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Add postgres

Browse source 
This commits adds support for postgres database.
Currently two fields are stored: the bloom filter and the topic.
Only the bloom filter is actually used to query, but potentially we will
use also the topic in the future, so easier to separate it now in order
to avoid a migration.
This commit is contained in:
Andrea Maria Piana 2019-05-13 11:25:46 +02:00
parent 9e89efd859
commit 4ab08629f6
52 changed files with 7655 additions and 56 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
.codeclimate.yml
View file

@ -41,4 +41,5 @@ exclude_patterns:
- vendor/
- static/
- t/
- mailserver/migrations
- services/shhext/chat/migrations

17
Gopkg.lock generated
View file

@ -373,6 +373,18 @@
pruneopts = "T"
revision = "f00545f9f3748e591590be3732d913c77525b10f"
[[projects]]
branch = "master"
digest = "1:f8a9f7e4b9da760c589c6b4ce06a4b7b88085850605f8a9b88cd0d8dd523f614"
name = "github.com/lib/pq"
packages = [
".",
"oid",
"scram",
]
pruneopts = "NUT"
revision = "2ff3cb3adc01768e0a552b3a02575a6df38a9bea"
[[projects]]
digest = "1:7f9d01bc5289296160042e42e146052ae9fb8fdb92be6dd11b0e5d4916784f6d"
name = "github.com/libp2p/go-addr-util"
@ -822,10 +834,11 @@
version = "v1.0.0"
[[projects]]
digest = "1:7607ae0e3b67bdf37a65dc42f866a90bcbe543308e92184c51e33a4cca842ecb"
digest = "1:e93ff99796affffb8cfd16ff6fb8b54b089c3edac11b82d3ee2f17ffb2a0f7a2"
name = "github.com/status-im/migrate"
packages = [
".",
"database/postgres",
"database/sqlcipher",
"source/go_bindata",
]
@ -1112,6 +1125,7 @@
"github.com/ethereum/go-ethereum/rpc",
"github.com/golang/mock/gomock",
"github.com/golang/protobuf/proto",
"github.com/lib/pq",
"github.com/libp2p/go-libp2p-crypto",
"github.com/multiformats/go-multiaddr",
"github.com/mutecomm/go-sqlcipher",
@ -1120,6 +1134,7 @@
"github.com/status-im/doubleratchet",
"github.com/status-im/go-ethereum/common/hexutil",
"github.com/status-im/migrate",
"github.com/status-im/migrate/database/postgres",
"github.com/status-im/migrate/database/sqlcipher",
"github.com/status-im/migrate/source/go_bindata",
"github.com/status-im/rendezvous",

2
Makefile
View file

@ -191,7 +191,7 @@ setup-build: dep-install lint-install release-install gomobile-install ##@other
setup: setup-build setup-dev ##@other Prepare project for development and building
generate: ##@other Regenerate assets and other auto-generated stuff
go generate ./static ./static/migrations
go generate ./static ./static/encryption_migrations ./static/mailserver_db_migrations
$(shell cd ./services/shhext/chat && exec protoc --go_out=. ./*.proto)
prepare-release: clean-release

2
VERSION
View file

@ -1 +1 @@
0.25.0-beta.1
0.25.0-beta.2

20
config/README.md
View file

@ -67,6 +67,26 @@ If you want your node to relay Whisper(SHH) protocol messages you'll want to inc
```
The `MailServerPassword` is used for symmetric encryption of history requests.
By default it will use `leveldb` embedded database. To use postgres instead you need to
pass a config of this kind:
```json
{
"WhisperConfig": {
"Enabled": true,
"EnableMailServer": true,
"LightClient": false,
"MailServerPassword": "status-offline-inbox"
"DatabaseConfig": {
"PGConfig": {
"Enabled": true,
"URI": "postgres://user:password@host:port?options"
}
}
}
}
```
__NOTE:__ The default password used by Status App and [our mailservers](https://fleets.status.im/) is `status-offline-inbox`.
## `ClusterConfig`

4
mailserver/cleaner.go
View file

@ -16,7 +16,7 @@ const (
type dbCleaner struct {
sync.RWMutex
db dbImpl
db DB
batchSize int
retention time.Duration
@ -25,7 +25,7 @@ type dbCleaner struct {
}
// newDBCleaner returns a new cleaner for db.
func newDBCleaner(db dbImpl, retention time.Duration) *dbCleaner {
func newDBCleaner(db DB, retention time.Duration) *dbCleaner {
return &dbCleaner{
db: db,
retention: retention,

13
mailserver/cleaner_test.go
View file

@ -90,7 +90,7 @@ func setupTestServer(t *testing.T) *WMailServer {
var s WMailServer
db, _ := leveldb.Open(storage.NewMemStorage(), nil)
s.db = &LevelDBImpl{ldb: db}
s.db = &LevelDB{ldb: db}
s.pow = powRequirement
return &s
}
@ -114,7 +114,7 @@ func testMessagesCount(t *testing.T, expected int, s *WMailServer) {
require.Equal(t, expected, count, fmt.Sprintf("expected %d message, got: %d", expected, count))
}
func countMessages(t *testing.T, db dbImpl) int {
func countMessages(t *testing.T, db DB) int {
var (
count int
zero common.Hash
@ -130,12 +130,17 @@ func countMessages(t *testing.T, db dbImpl) int {
end: ku.raw,
}
i := db.BuildIterator(query)
i, _ := db.BuildIterator(query)
defer i.Release()
for i.Next() {
var env whisper.Envelope
err := rlp.DecodeBytes(i.Value(), &env)
value, err := i.GetEnvelope(query.bloom)
if err != nil {
t.Fatal(err)
}
err = rlp.DecodeBytes(value, &env)
if err != nil {
t.Fatal(err)
}

50
mailserver/mailserver.go
View file

@ -55,7 +55,7 @@ const (
// WMailServer whisper mailserver.
type WMailServer struct {
db dbImpl
db DB
w *whisper.Whisper
pow float64
symFilter *whisper.Filter
@ -69,8 +69,6 @@ type WMailServer struct {
// Init initializes mailServer.
func (s *WMailServer) Init(shh *whisper.Whisper, config *params.WhisperConfig) error {
var err error
if len(config.DataDir) == 0 {
return errDirectoryNotProvided
}
@ -92,11 +90,22 @@ func (s *WMailServer) Init(shh *whisper.Whisper, config *params.WhisperConfig) e
// Open database in the last step in order not to init with error
// and leave the database open by accident.
database, err := NewLevelDBImpl(config)
if err != nil {
return fmt.Errorf("open DB: %s", err)
if config.DatabaseConfig.PGConfig.Enabled {
log.Info("Connecting to postgres database")
database, err := NewPostgresDB(config)
if err != nil {
return fmt.Errorf("open DB: %s", err)
}
s.db = database
log.Info("Connected to postgres database")
} else {
// Defaults to LevelDB
database, err := NewLevelDB(config)
if err != nil {
return fmt.Errorf("open DB: %s", err)
}
s.db = database
}
s.db = database
if config.MailServerDataRetention > 0 {
// MailServerDataRetention is a number of days.
@ -253,7 +262,15 @@ func (s *WMailServer) DeliverMail(peer *whisper.Peer, request *whisper.Envelope)
requestsBatchedCounter.Inc(1)
}
iter := s.createIterator(lower, upper, cursor, bloom, limit)
iter, err := s.createIterator(lower, upper, cursor, bloom, limit)
if err != nil {
log.Error("[mailserver:DeliverMail] request failed",
"peerID", peerID,
"requestID", requestID)
return
}
defer iter.Release()
bundles := make(chan []rlp.RawValue, 5)
@ -347,7 +364,10 @@ func (s *WMailServer) SyncMail(peer *whisper.Peer, request whisper.SyncMailReque
return fmt.Errorf("request is invalid: %v", err)
}
iter := s.createIterator(request.Lower, request.Upper, request.Cursor, nil, 0)
iter, err := s.createIterator(request.Lower, request.Upper, request.Cursor, nil, 0)
if err != nil {
return err
}
defer iter.Release()
bundles := make(chan []rlp.RawValue, 5)
@ -393,7 +413,7 @@ func (s *WMailServer) SyncMail(peer *whisper.Peer, request whisper.SyncMailReque
peer,
whisper.SyncResponse{Error: "failed to process all envelopes"},
)
return fmt.Errorf("levelDB iterator failed: %v", err)
return fmt.Errorf("LevelDB iterator failed: %v", err)
}
log.Info("Finished syncing envelopes", "peer", peerIDString(peer))
@ -428,7 +448,7 @@ func (s *WMailServer) exceedsPeerRequests(peer []byte) bool {
return true
}
func (s *WMailServer) createIterator(lower, upper uint32, cursor []byte, bloom []byte, limit uint32) Iterator {
func (s *WMailServer) createIterator(lower, upper uint32, cursor []byte, bloom []byte, limit uint32) (Iterator, error) {
var (
emptyHash common.Hash
emptyTopic whisper.TopicType
@ -495,7 +515,13 @@ func (s *WMailServer) processRequestInBundles(
continue
}
key := iter.DBKey()
key, err := iter.DBKey()
if err != nil {
log.Error("[mailserver:processRequestInBundles] failed getting key",
"requestID", requestID)
break
}
lastEnvelopeHash = key.EnvelopeHash()
processedEnvelopes++

10
mailserver/mailserver_db.go
View file

@ -5,9 +5,9 @@ import (
"time"
)
// dbImpl is an interface to abstract interactions with the db so that the mailserver
// DB is an interface to abstract interactions with the db so that the mailserver
// is agnostic to the underlaying technology used
type dbImpl interface {
type DB interface {
Close() error
// SaveEnvelope stores an envelope
SaveEnvelope(*whisper.Envelope) error
@ -16,14 +16,12 @@ type dbImpl interface {
// Prune removes envelopes older than time
Prune(time.Time, int) (int, error)
// BuildIterator returns an iterator over envelopes
BuildIterator(query CursorQuery) Iterator
BuildIterator(query CursorQuery) (Iterator, error)
}
type Iterator interface {
Next() bool
Prev() bool
DBKey() *DBKey
Value() []byte
DBKey() (*DBKey, error)
Release()
Error() error
GetEnvelope(bloom []byte) ([]byte, error)

40
mailserver/mailserver_db_leveldb.go
View file

@ -14,7 +14,7 @@ import (
"time"
)
type LevelDBImpl struct {
type LevelDB struct {
// We can't embed as there are some state problems with go-routines
ldb *leveldb.DB
}
@ -23,10 +23,10 @@ type LevelDBIterator struct {
iterator.Iterator
}
func (i *LevelDBIterator) DBKey() *DBKey {
func (i *LevelDBIterator) DBKey() (*DBKey, error) {
return &DBKey{
raw: i.Key(),
}
}, nil
}
func (i *LevelDBIterator) GetEnvelope(bloom []byte) ([]byte, error) {
@ -34,7 +34,11 @@ func (i *LevelDBIterator) GetEnvelope(bloom []byte) ([]byte, error) {
rawValue := make([]byte, len(i.Value()))
copy(rawValue, i.Value())
key := i.DBKey()
key, err := i.DBKey()
if err != nil {
return nil, err
}
if len(key.Bytes()) != DBKeyLength {
var err error
envelopeBloom, err = extractBloomFromEncodedEnvelope(rawValue)
@ -51,18 +55,18 @@ func (i *LevelDBIterator) GetEnvelope(bloom []byte) ([]byte, error) {
}
func NewLevelDBImpl(config *params.WhisperConfig) (*LevelDBImpl, error) {
func NewLevelDB(config *params.WhisperConfig) (*LevelDB, error) {
// Open opens an existing leveldb database
db, err := leveldb.OpenFile(config.DataDir, nil)
if _, iscorrupted := err.(*errors.ErrCorrupted); iscorrupted {
log.Info("database is corrupted trying to recover", "path", config.DataDir)
db, err = leveldb.RecoverFile(config.DataDir, nil)
}
return &LevelDBImpl{ldb: db}, err
return &LevelDB{ldb: db}, err
}
// Build iterator returns an iterator given a start/end and a cursor
func (db *LevelDBImpl) BuildIterator(query CursorQuery) Iterator {
func (db *LevelDB) BuildIterator(query CursorQuery) (Iterator, error) {
defer recoverLevelDBPanics("BuildIterator")
i := db.ldb.NewIterator(&util.Range{Start: query.start, Limit: query.end}, nil)
@ -70,18 +74,18 @@ func (db *LevelDBImpl) BuildIterator(query CursorQuery) Iterator {
if len(query.cursor) == CursorLength {
i.Seek(query.cursor)
}
return &LevelDBIterator{i}
return &LevelDBIterator{i}, nil
}
// GetEnvelope get an envelope by its key
func (db *LevelDBImpl) GetEnvelope(key *DBKey) ([]byte, error) {
func (db *LevelDB) GetEnvelope(key *DBKey) ([]byte, error) {
defer recoverLevelDBPanics("GetEnvelope")
return db.ldb.Get(key.Bytes(), nil)
}
// Prune removes envelopes older than time
func (db *LevelDBImpl) Prune(t time.Time, batchSize int) (int, error) {
func (db *LevelDB) Prune(t time.Time, batchSize int) (int, error) {
defer recoverLevelDBPanics("Prune")
var zero common.Hash
@ -92,14 +96,22 @@ func (db *LevelDBImpl) Prune(t time.Time, batchSize int) (int, error) {
start: kl.Bytes(),
end: ku.Bytes(),
}
i := db.BuildIterator(query)
i, err := db.BuildIterator(query)
if err != nil {
return 0, err
}
defer i.Release()
batch := leveldb.Batch{}
removed := 0
for i.Next() {
batch.Delete(i.DBKey().Bytes())
dbKey, err := i.DBKey()
if err != nil {
return 0, err
}
batch.Delete(dbKey.Bytes())
if batch.Len() == batchSize {
if err := db.ldb.Write(&batch, nil); err != nil {
@ -123,7 +135,7 @@ func (db *LevelDBImpl) Prune(t time.Time, batchSize int) (int, error) {
}
// SaveEnvelope stores an envelope in leveldb and increments the metrics
func (db *LevelDBImpl) SaveEnvelope(env *whisper.Envelope) error {
func (db *LevelDB) SaveEnvelope(env *whisper.Envelope) error {
defer recoverLevelDBPanics("SaveEnvelope")
key := NewDBKey(env.Expiry-env.TTL, env.Topic, env.Hash())
@ -143,7 +155,7 @@ func (db *LevelDBImpl) SaveEnvelope(env *whisper.Envelope) error {
return err
}
func (db *LevelDBImpl) Close() error {
func (db *LevelDB) Close() error {
return db.ldb.Close()
}

225
mailserver/mailserver_db_postgres.go Normal file
View file

@ -0,0 +1,225 @@
package mailserver
import (
"database/sql"
"fmt"
"time"
// Import postgres driver
_ "github.com/lib/pq"
"github.com/status-im/migrate"
"github.com/status-im/migrate/database/postgres"
"github.com/status-im/migrate/source/go_bindata"
"github.com/status-im/status-go/mailserver/migrations"
"github.com/status-im/status-go/params"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/rlp"
whisper "github.com/status-im/whisper/whisperv6"
)
func NewPostgresDB(config *params.WhisperConfig) (*PostgresDB, error) {
db, err := sql.Open("postgres", config.DatabaseConfig.PGConfig.URI)
if err != nil {
return nil, err
}
instance := &PostgresDB{db: db}
if err := instance.setup(); err != nil {
return nil, err
}
return instance, nil
}
type PostgresDB struct {
db *sql.DB
}
type postgresIterator struct {
*sql.Rows
}
func (i *postgresIterator) DBKey() (*DBKey, error) {
var value []byte
var id []byte
if err := i.Scan(&id, &value); err != nil {
return nil, err
}
return &DBKey{raw: id}, nil
}
func (i *postgresIterator) Error() error {
return nil
}
func (i *postgresIterator) Release() {
i.Close()
}
func (i *postgresIterator) GetEnvelope(bloom []byte) ([]byte, error) {
var value []byte
var id []byte
if err := i.Scan(&id, &value); err != nil {
return nil, err
}
return value, nil
}
func (i *PostgresDB) BuildIterator(query CursorQuery) (Iterator, error) {
var upperLimit []byte
var stmtString string
if len(query.cursor) > 0 {
// If we have a cursor, we don't want to include that envelope in the result set
upperLimit = query.cursor
// We disable security checks as we need to use string interpolation
// for this, but it's converted to 0s and 1s so no injection should be possible
/* #nosec */
stmtString = fmt.Sprintf("SELECT id, data FROM envelopes where id >= $1 AND id < $2 AND bloom & b'%s'::bit(512) = bloom ORDER BY ID DESC LIMIT $3", toBitString(query.bloom))
} else {
upperLimit = query.end
// We disable security checks as we need to use string interpolation
// for this, but it's converted to 0s and 1s so no injection should be possible
/* #nosec */
stmtString = fmt.Sprintf("SELECT id, data FROM envelopes where id >= $1 AND id <= $2 AND bloom & b'%s'::bit(512) = bloom ORDER BY ID DESC LIMIT $3", toBitString(query.bloom))
}
stmt, err := i.db.Prepare(stmtString)
if err != nil {
return nil, err
}
rows, err := stmt.Query(query.start, upperLimit, query.limit)
if err != nil {
return nil, err
}
return &postgresIterator{rows}, nil
}
func (i *PostgresDB) setup() error {
resources := bindata.Resource(
migrations.AssetNames(),
func(name string) ([]byte, error) {
return migrations.Asset(name)
},
)
source, err := bindata.WithInstance(resources)
if err != nil {
return err
}
driver, err := postgres.WithInstance(i.db, &postgres.Config{})
if err != nil {
return err
}
m, err := migrate.NewWithInstance(
"go-bindata",
source,
"postgres",
driver)
if err != nil {
return err
}
if err = m.Up(); err != migrate.ErrNoChange {
return err
}
return nil
}
func (i *PostgresDB) Close() error {
return i.db.Close()
}
func (i *PostgresDB) GetEnvelope(key *DBKey) ([]byte, error) {
statement := `SELECT data FROM envelopes WHERE id = $1`
stmt, err := i.db.Prepare(statement)
if err != nil {
return nil, err
}
defer stmt.Close()
var envelope []byte
if err = stmt.QueryRow(key.Bytes()).Scan(&envelope); err != nil {
return nil, err
}
return envelope, nil
}
func (i *PostgresDB) Prune(t time.Time, batch int) (int, error) {
var zero common.Hash
var emptyTopic whisper.TopicType
kl := NewDBKey(0, emptyTopic, zero)
ku := NewDBKey(uint32(t.Unix()), emptyTopic, zero)
statement := "DELETE FROM envelopes WHERE id BETWEEN $1 AND $2"
stmt, err := i.db.Prepare(statement)
if err != nil {
return 0, err
}
defer stmt.Close()
if _, err = stmt.Exec(kl.Bytes(), ku.Bytes()); err != nil {
return 0, err
}
return 0, nil
}
func (i *PostgresDB) SaveEnvelope(env *whisper.Envelope) error {
key := NewDBKey(env.Expiry-env.TTL, env.Topic, env.Hash())
rawEnvelope, err := rlp.EncodeToBytes(env)
if err != nil {
log.Error(fmt.Sprintf("rlp.EncodeToBytes failed: %s", err))
archivedErrorsCounter.Inc(1)
return err
}
statement := "INSERT INTO envelopes (id, data, topic, bloom) VALUES ($1, $2, $3, B'"
statement += toBitString(env.Bloom())
statement += "'::bit(512)) ON CONFLICT (id) DO NOTHING;"
stmt, err := i.db.Prepare(statement)
if err != nil {
return err
}
defer stmt.Close()
_, err = stmt.Exec(
key.Bytes(),
rawEnvelope,
topicToByte(env.Topic),
)
if err != nil {
archivedErrorsCounter.Inc(1)
return err
}
archivedMeter.Mark(1)
archivedSizeMeter.Mark(int64(whisper.EnvelopeHeaderLength + len(env.Data)))
return nil
}
func topicToByte(t whisper.TopicType) []byte {
return []byte{t[0], t[1], t[2], t[3]}
}
func toBitString(bloom []byte) string {
val := ""
for _, n := range bloom {
val += fmt.Sprintf("%08b", n)
}
return val
}

6
mailserver/mailserver_test.go
View file

@ -577,7 +577,9 @@ func (s *MailserverSuite) TestProcessRequestDeadlockHandling() {
for _, tc := range testCases {
s.T().Run(tc.Name, func(t *testing.T) {
iter := s.server.createIterator(lower, upper, cursor, nil, 0)
iter, err := s.server.createIterator(lower, upper, cursor, nil, 0)
s.Require().NoError(err)
defer iter.Release()
// Nothing reads from this unbuffered channel which simulates a situation
@ -776,7 +778,7 @@ func generateEnvelope(sentTime time.Time) (*whisper.Envelope, error) {
func processRequestAndCollectHashes(
server *WMailServer, lower, upper uint32, cursor []byte, bloom []byte, limit int,
) ([]common.Hash, []byte, common.Hash) {
iter := server.createIterator(lower, upper, cursor, nil, 0)
iter, _ := server.createIterator(lower, upper, cursor, nil, 0)
defer iter.Release()
bundles := make(chan []rlp.RawValue, 10)
done := make(chan struct{})

281
mailserver/migrations/bindata.go Normal file
View file

@ -0,0 +1,281 @@
// Code generated by go-bindata.
// sources:
// 1557732988_initialize_db.down.sql
// 1557732988_initialize_db.up.sql
// static.go
// DO NOT EDIT!
package migrations
import (
"bytes"
"compress/gzip"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"strings"
"time"
)
func bindataRead(data []byte, name string) ([]byte, error) {
gz, err := gzip.NewReader(bytes.NewBuffer(data))
if err != nil {
return nil, fmt.Errorf("Read %q: %v", name, err)
}
var buf bytes.Buffer
_, err = io.Copy(&buf, gz)
clErr := gz.Close()
if err != nil {
return nil, fmt.Errorf("Read %q: %v", name, err)
}
if clErr != nil {
return nil, err
}
return buf.Bytes(), nil
}
type asset struct {
bytes []byte
info os.FileInfo
}
type bindataFileInfo struct {
name string
size int64
mode os.FileMode
modTime time.Time
}
func (fi bindataFileInfo) Name() string {
return fi.name
}
func (fi bindataFileInfo) Size() int64 {
return fi.size
}
func (fi bindataFileInfo) Mode() os.FileMode {
return fi.mode
}
func (fi bindataFileInfo) ModTime() time.Time {
return fi.modTime
}
func (fi bindataFileInfo) IsDir() bool {
return false
}
func (fi bindataFileInfo) Sys() interface{} {
return nil
}
var __1557732988_initialize_dbDownSql = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x72\x09\xf2\x0f\x50\xf0\xf4\x73\x71\x8d\x50\xc8\x4c\x89\x4f\xca\xc9\xcf\xcf\x8d\xcf\x4c\xa9\xb0\xe6\x42\x95\x28\xc9\x2f\xc8\x4c\x46\x92\x08\x71\x74\xf2\x71\x55\x48\xcd\x2b\x4b\xcd\xc9\x2f\x48\x2d\xb6\xe6\x02\x04\x00\x00\xff\xff\x6b\x93\xaa\x08\x48\x00\x00\x00")
func _1557732988_initialize_dbDownSqlBytes() ([]byte, error) {
return bindataRead(
__1557732988_initialize_dbDownSql,
"1557732988_initialize_db.down.sql",
)
}
func _1557732988_initialize_dbDownSql() (*asset, error) {
bytes, err := _1557732988_initialize_dbDownSqlBytes()
if err != nil {
return nil, err
}
info := bindataFileInfo{name: "1557732988_initialize_db.down.sql", size: 72, mode: os.FileMode(420), modTime: time.Unix(1557741108, 0)}
a := &asset{bytes: bytes, info: info}
return a, nil
}
var __1557732988_initialize_dbUpSql = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x72\x0e\x72\x75\x0c\x71\x55\x08\x71\x74\xf2\x71\x55\x48\xcd\x2b\x4b\xcd\xc9\x2f\x48\x2d\x56\xd0\xc8\x4c\x51\x70\x8a\x0c\x71\x75\x54\xf0\xf3\x0f\x51\xf0\x0b\xf5\xf1\x51\x08\xf5\xf3\x0c\x0c\x75\xd5\x51\x48\x49\x2c\x49\x44\x93\xd3\x51\x28\xc9\x2f\xc8\x4c\xc6\x10\x4d\xca\xc9\xcf\xcf\x55\x70\xf2\x0c\xd1\x30\x35\x34\xd2\x84\x4b\x68\x5a\x73\x71\x41\xed\xf5\xf4\x73\x71\x8d\x50\xc8\x4c\x89\x07\x2b\x8d\xcf\x4c\xa9\x50\xf0\xf7\x43\x73\x87\x8b\x6b\xb0\x33\xd4\x2c\x4d\x6b\x0c\x8d\x60\x9b\xf1\x69\x04\x2b\xd0\xb4\xe6\x02\x04\x00\x00\xff\xff\xe2\x06\x6b\x16\xea\x00\x00\x00")
func _1557732988_initialize_dbUpSqlBytes() ([]byte, error) {
return bindataRead(
__1557732988_initialize_dbUpSql,
"1557732988_initialize_db.up.sql",
)
}
func _1557732988_initialize_dbUpSql() (*asset, error) {
bytes, err := _1557732988_initialize_dbUpSqlBytes()
if err != nil {
return nil, err
}
info := bindataFileInfo{name: "1557732988_initialize_db.up.sql", size: 234, mode: os.FileMode(420), modTime: time.Unix(1557742866, 0)}
a := &asset{bytes: bytes, info: info}
return a, nil
}
var _staticGo = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x54\x8c\x41\x6a\xc3\x40\x0c\x45\xf7\x73\x8a\xbf\x6c\xa1\x1e\xed\x7b\x82\x52\x12\x08\x24\x17\x90\x6d\x21\x0b\xc7\x33\x46\x52\x72\xfe\x6c\x12\x42\x96\x8f\xc7\x7b\x44\x38\xf1\xb4\xb2\x0a\x22\x39\x6d\x82\x6c\xa3\xcc\xf1\xa2\xaf\xff\xf3\x0f\xfe\x2e\xc7\xc3\x37\x5c\xa2\xdf\x7c\x92\x80\x9b\x2e\x09\x6b\xd9\x91\x8b\x60\xb4\xc6\x6e\x12\x65\xff\x38\x95\x42\xa4\xfd\x57\xa5\x89\x73\x0a\xb4\x0f\xa3\xb5\x99\x93\x31\xec\xab\x62\x33\x75\x4e\xeb\x2d\x30\x74\xd4\x4a\xb5\xd2\xc6\x76\x0d\xf1\xbb\x38\xbd\x35\x3d\xb3\xaa\x1d\xb5\x3c\x02\x00\x00\xff\xff\xf4\xe4\x35\xe2\xb2\x00\x00\x00")
func staticGoBytes() ([]byte, error) {
return bindataRead(
_staticGo,
"static.go",
)
}
func staticGo() (*asset, error) {
bytes, err := staticGoBytes()
if err != nil {
return nil, err
}
info := bindataFileInfo{name: "static.go", size: 178, mode: os.FileMode(420), modTime: time.Unix(1557739557, 0)}
a := &asset{bytes: bytes, info: info}
return a, nil
}
// Asset loads and returns the asset for the given name.
// It returns an error if the asset could not be found or
// could not be loaded.
func Asset(name string) ([]byte, error) {
cannonicalName := strings.Replace(name, "\\", "/", -1)
if f, ok := _bindata[cannonicalName]; ok {
a, err := f()
if err != nil {
return nil, fmt.Errorf("Asset %s can't read by error: %v", name, err)
}
return a.bytes, nil
}
return nil, fmt.Errorf("Asset %s not found", name)
}
// MustAsset is like Asset but panics when Asset would return an error.
// It simplifies safe initialization of global variables.
func MustAsset(name string) []byte {
a, err := Asset(name)
if err != nil {
panic("asset: Asset(" + name + "): " + err.Error())
}
return a
}
// AssetInfo loads and returns the asset info for the given name.
// It returns an error if the asset could not be found or
// could not be loaded.
func AssetInfo(name string) (os.FileInfo, error) {
cannonicalName := strings.Replace(name, "\\", "/", -1)
if f, ok := _bindata[cannonicalName]; ok {
a, err := f()
if err != nil {
return nil, fmt.Errorf("AssetInfo %s can't read by error: %v", name, err)
}
return a.info, nil
}
return nil, fmt.Errorf("AssetInfo %s not found", name)
}
// AssetNames returns the names of the assets.
func AssetNames() []string {
names := make([]string, 0, len(_bindata))
for name := range _bindata {
names = append(names, name)
}
return names
}
// _bindata is a table, holding each asset generator, mapped to its name.
var _bindata = map[string]func() (*asset, error){
"1557732988_initialize_db.down.sql": _1557732988_initialize_dbDownSql,
"1557732988_initialize_db.up.sql": _1557732988_initialize_dbUpSql,
"static.go": staticGo,
}
// AssetDir returns the file names below a certain
// directory embedded in the file by go-bindata.
// For example if you run go-bindata on data/... and data contains the
// following hierarchy:
// data/
// foo.txt
// img/
// a.png
// b.png
// then AssetDir("data") would return []string{"foo.txt", "img"}
// AssetDir("data/img") would return []string{"a.png", "b.png"}
// AssetDir("foo.txt") and AssetDir("notexist") would return an error
// AssetDir("") will return []string{"data"}.
func AssetDir(name string) ([]string, error) {
node := _bintree
if len(name) != 0 {
cannonicalName := strings.Replace(name, "\\", "/", -1)
pathList := strings.Split(cannonicalName, "/")
for _, p := range pathList {
node = node.Children[p]
if node == nil {
return nil, fmt.Errorf("Asset %s not found", name)
}
}
}
if node.Func != nil {
return nil, fmt.Errorf("Asset %s not found", name)
}
rv := make([]string, 0, len(node.Children))
for childName := range node.Children {
rv = append(rv, childName)
}
return rv, nil
}
type bintree struct {
Func func() (*asset, error)
Children map[string]*bintree
}
var _bintree = &bintree{nil, map[string]*bintree{
"1557732988_initialize_db.down.sql": &bintree{_1557732988_initialize_dbDownSql, map[string]*bintree{}},
"1557732988_initialize_db.up.sql": &bintree{_1557732988_initialize_dbUpSql, map[string]*bintree{}},
"static.go": &bintree{staticGo, map[string]*bintree{}},
}}
// RestoreAsset restores an asset under the given directory
func RestoreAsset(dir, name string) error {
data, err := Asset(name)
if err != nil {
return err
}
info, err := AssetInfo(name)
if err != nil {
return err
}
err = os.MkdirAll(_filePath(dir, filepath.Dir(name)), os.FileMode(0755))
if err != nil {
return err
}
err = ioutil.WriteFile(_filePath(dir, name), data, info.Mode())
if err != nil {
return err
}
err = os.Chtimes(_filePath(dir, name), info.ModTime(), info.ModTime())
if err != nil {
return err
}
return nil
}
// RestoreAssets restores an asset under the given directory recursively
func RestoreAssets(dir, name string) error {
children, err := AssetDir(name)
// File
if err != nil {
return RestoreAsset(dir, name)
}
// Dir
for _, child := range children {
err = RestoreAssets(dir, filepath.Join(name, child))
if err != nil {
return err
}
}
return nil
}
func _filePath(dir, name string) string {
cannonicalName := strings.Replace(name, "\\", "/", -1)
return filepath.Join(append([]string{dir}, strings.Split(cannonicalName, "/")...)...)
}

14
params/config.go
View file

@ -85,6 +85,20 @@ type WhisperConfig struct {
// MaxMessageSize is a maximum size of a devp2p packet handled by the Whisper protocol,
// not only the size of envelopes sent in that packet.
MaxMessageSize uint32
// DatabaseConfig is configuration for which datastore we use
DatabaseConfig DatabaseConfig
}
type DatabaseConfig struct {
PGConfig PGConfig
}
type PGConfig struct {
// Enabled whether we should use a posgres instance
Enabled bool
// The URI of the server
URI string
}
// String dumps config object as nicely indented JSON

18
services/shhext/chat/migrations/bindata.go
View file

@ -91,7 +91,7 @@ func _1536754952_initial_schemaDownSql() (*asset, error) {
return nil, err
}
info := bindataFileInfo{name: "1536754952_initial_schema.down.sql", size: 83, mode: os.FileMode(420), modTime: time.Unix(1541418081, 0)}
info := bindataFileInfo{name: "1536754952_initial_schema.down.sql", size: 83, mode: os.FileMode(420), modTime: time.Unix(1557739557, 0)}
a := &asset{bytes: bytes, info: info}
return a, nil
}
@ -111,7 +111,7 @@ func _1536754952_initial_schemaUpSql() (*asset, error) {
return nil, err
}
info := bindataFileInfo{name: "1536754952_initial_schema.up.sql", size: 962, mode: os.FileMode(420), modTime: time.Unix(1541418081, 0)}
info := bindataFileInfo{name: "1536754952_initial_schema.up.sql", size: 962, mode: os.FileMode(420), modTime: time.Unix(1557739557, 0)}
a := &asset{bytes: bytes, info: info}
return a, nil
}
@ -131,7 +131,7 @@ func _1539249977_update_ratchet_infoDownSql() (*asset, error) {
return nil, err
}
info := bindataFileInfo{name: "1539249977_update_ratchet_info.down.sql", size: 311, mode: os.FileMode(420), modTime: time.Unix(1543402727, 0)}
info := bindataFileInfo{name: "1539249977_update_ratchet_info.down.sql", size: 311, mode: os.FileMode(420), modTime: time.Unix(1557739557, 0)}
a := &asset{bytes: bytes, info: info}
return a, nil
}
@ -151,7 +151,7 @@ func _1539249977_update_ratchet_infoUpSql() (*asset, error) {
return nil, err
}
info := bindataFileInfo{name: "1539249977_update_ratchet_info.up.sql", size: 368, mode: os.FileMode(420), modTime: time.Unix(1543402727, 0)}
info := bindataFileInfo{name: "1539249977_update_ratchet_info.up.sql", size: 368, mode: os.FileMode(420), modTime: time.Unix(1557739557, 0)}
a := &asset{bytes: bytes, info: info}
return a, nil
}
@ -171,7 +171,7 @@ func _1540715431_add_versionDownSql() (*asset, error) {
return nil, err
}
info := bindataFileInfo{name: "1540715431_add_version.down.sql", size: 127, mode: os.FileMode(420), modTime: time.Unix(1543402867, 0)}
info := bindataFileInfo{name: "1540715431_add_version.down.sql", size: 127, mode: os.FileMode(420), modTime: time.Unix(1557739557, 0)}
a := &asset{bytes: bytes, info: info}
return a, nil
}
@ -191,7 +191,7 @@ func _1540715431_add_versionUpSql() (*asset, error) {
return nil, err
}
info := bindataFileInfo{name: "1540715431_add_version.up.sql", size: 265, mode: os.FileMode(420), modTime: time.Unix(1543402867, 0)}
info := bindataFileInfo{name: "1540715431_add_version.up.sql", size: 265, mode: os.FileMode(420), modTime: time.Unix(1557739557, 0)}
a := &asset{bytes: bytes, info: info}
return a, nil
}
@ -211,7 +211,7 @@ func _1541164797_add_installationsDownSql() (*asset, error) {
return nil, err
}
info := bindataFileInfo{name: "1541164797_add_installations.down.sql", size: 26, mode: os.FileMode(420), modTime: time.Unix(1543402888, 0)}
info := bindataFileInfo{name: "1541164797_add_installations.down.sql", size: 26, mode: os.FileMode(420), modTime: time.Unix(1557739557, 0)}
a := &asset{bytes: bytes, info: info}
return a, nil
}
@ -231,7 +231,7 @@ func _1541164797_add_installationsUpSql() (*asset, error) {
return nil, err
}
info := bindataFileInfo{name: "1541164797_add_installations.up.sql", size: 216, mode: os.FileMode(420), modTime: time.Unix(1543402888, 0)}
info := bindataFileInfo{name: "1541164797_add_installations.up.sql", size: 216, mode: os.FileMode(420), modTime: time.Unix(1557739557, 0)}
a := &asset{bytes: bytes, info: info}
return a, nil
}
@ -251,7 +251,7 @@ func staticGo() (*asset, error) {
return nil, err
}
info := bindataFileInfo{name: "static.go", size: 188, mode: os.FileMode(420), modTime: time.Unix(1541418081, 0)}
info := bindataFileInfo{name: "static.go", size: 188, mode: os.FileMode(420), modTime: time.Unix(1557739557, 0)}
a := &asset{bytes: bytes, info: info}
return a, nil
}

29
static/bindata.go
View file

File diff suppressed because one or more lines are too long

0
static/migrations/1536754952_initial_schema.down.sql → static/encryption_migrations/1536754952_initial_schema.down.sql
View file

0
static/migrations/1536754952_initial_schema.up.sql → static/encryption_migrations/1536754952_initial_schema.up.sql
View file

0
static/migrations/1539249977_update_ratchet_info.down.sql → static/encryption_migrations/1539249977_update_ratchet_info.down.sql
View file

0
static/migrations/1539249977_update_ratchet_info.up.sql → static/encryption_migrations/1539249977_update_ratchet_info.up.sql
View file

0
static/migrations/1540715431_add_version.down.sql → static/encryption_migrations/1540715431_add_version.down.sql
View file

0
static/migrations/1540715431_add_version.up.sql → static/encryption_migrations/1540715431_add_version.up.sql
View file

0
static/migrations/1541164797_add_installations.down.sql → static/encryption_migrations/1541164797_add_installations.down.sql
View file

0
static/migrations/1541164797_add_installations.up.sql → static/encryption_migrations/1541164797_add_installations.up.sql
View file

0
static/migrations/static.go → static/encryption_migrations/static.go
View file

3
static/mailserver_db_migrations/1557732988_initialize_db.down.sql Normal file
View file

@ -0,0 +1,3 @@
DROP INDEX id_bloom_idx;
DROP INDEX id_topic_idx;
DROP TABLE envelopes;

4
static/mailserver_db_migrations/1557732988_initialize_db.up.sql Normal file
View file

@ -0,0 +1,4 @@
CREATE TABLE envelopes (id BYTEA NOT NULL UNIQUE, data BYTEA NOT NULL, topic BYTEA NOT NULL, bloom BIT(512) NOT NULL);
CREATE INDEX id_bloom_idx ON envelopes (id DESC, bloom);
CREATE INDEX id_topic_idx ON envelopes (id DESC, topic);

4
static/mailserver_db_migrations/static.go Normal file
View file

@ -0,0 +1,4 @@
// Package static embeds static (JS, HTML) resources right into the binaries
package static
//go:generate go-bindata -pkg migrations -o ../../mailserver/migrations/bindata.go .

8
vendor/github.com/lib/pq/LICENSE.md generated vendored Normal file
View file

@ -0,0 +1,8 @@
Copyright (c) 2011-2013, 'pq' Contributors
Portions Copyright (C) 2011 Blake Mizerany
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

756
vendor/github.com/lib/pq/array.go generated vendored Normal file
View file

@ -0,0 +1,756 @@
package pq
import (
"bytes"
"database/sql"
"database/sql/driver"
"encoding/hex"
"fmt"
"reflect"
"strconv"
"strings"
)
var typeByteSlice = reflect.TypeOf([]byte{})
var typeDriverValuer = reflect.TypeOf((*driver.Valuer)(nil)).Elem()
var typeSQLScanner = reflect.TypeOf((*sql.Scanner)(nil)).Elem()
// Array returns the optimal driver.Valuer and sql.Scanner for an array or
// slice of any dimension.
//
// For example:
// db.Query(`SELECT * FROM t WHERE id = ANY($1)`, pq.Array([]int{235, 401}))
//
// var x []sql.NullInt64
// db.QueryRow('SELECT ARRAY[235, 401]').Scan(pq.Array(&x))
//
// Scanning multi-dimensional arrays is not supported. Arrays where the lower
// bound is not one (such as `[0:0]={1}') are not supported.
func Array(a interface{}) interface {
driver.Valuer
sql.Scanner
} {
switch a := a.(type) {
case []bool:
return (*BoolArray)(&a)
case []float64:
return (*Float64Array)(&a)
case []int64:
return (*Int64Array)(&a)
case []string:
return (*StringArray)(&a)
case *[]bool:
return (*BoolArray)(a)
case *[]float64:
return (*Float64Array)(a)
case *[]int64:
return (*Int64Array)(a)
case *[]string:
return (*StringArray)(a)
}
return GenericArray{a}
}
// ArrayDelimiter may be optionally implemented by driver.Valuer or sql.Scanner
// to override the array delimiter used by GenericArray.
type ArrayDelimiter interface {
// ArrayDelimiter returns the delimiter character(s) for this element's type.
ArrayDelimiter() string
}
// BoolArray represents a one-dimensional array of the PostgreSQL boolean type.
type BoolArray []bool
// Scan implements the sql.Scanner interface.
func (a *BoolArray) Scan(src interface{}) error {
switch src := src.(type) {
case []byte:
return a.scanBytes(src)
case string:
return a.scanBytes([]byte(src))
case nil:
*a = nil
return nil
}
return fmt.Errorf("pq: cannot convert %T to BoolArray", src)
}
func (a *BoolArray) scanBytes(src []byte) error {
elems, err := scanLinearArray(src, []byte{','}, "BoolArray")
if err != nil {
return err
}
if *a != nil && len(elems) == 0 {
*a = (*a)[:0]
} else {
b := make(BoolArray, len(elems))
for i, v := range elems {
if len(v) != 1 {
return fmt.Errorf("pq: could not parse boolean array index %d: invalid boolean %q", i, v)
}
switch v[0] {
case 't':
b[i] = true
case 'f':
b[i] = false
default:
return fmt.Errorf("pq: could not parse boolean array index %d: invalid boolean %q", i, v)
}
}
*a = b
}
return nil
}
// Value implements the driver.Valuer interface.
func (a BoolArray) Value() (driver.Value, error) {
if a == nil {
return nil, nil
}
if n := len(a); n > 0 {
// There will be exactly two curly brackets, N bytes of values,
// and N-1 bytes of delimiters.
b := make([]byte, 1+2*n)
for i := 0; i < n; i++ {
b[2*i] = ','
if a[i] {
b[1+2*i] = 't'
} else {
b[1+2*i] = 'f'
}
}
b[0] = '{'
b[2*n] = '}'
return string(b), nil
}
return "{}", nil
}
// ByteaArray represents a one-dimensional array of the PostgreSQL bytea type.
type ByteaArray [][]byte
// Scan implements the sql.Scanner interface.
func (a *ByteaArray) Scan(src interface{}) error {
switch src := src.(type) {
case []byte:
return a.scanBytes(src)
case string:
return a.scanBytes([]byte(src))
case nil:
*a = nil
return nil
}
return fmt.Errorf("pq: cannot convert %T to ByteaArray", src)
}
func (a *ByteaArray) scanBytes(src []byte) error {
elems, err := scanLinearArray(src, []byte{','}, "ByteaArray")
if err != nil {
return err
}
if *a != nil && len(elems) == 0 {
*a = (*a)[:0]
} else {
b := make(ByteaArray, len(elems))
for i, v := range elems {
b[i], err = parseBytea(v)
if err != nil {
return fmt.Errorf("could not parse bytea array index %d: %s", i, err.Error())
}
}
*a = b
}
return nil
}
// Value implements the driver.Valuer interface. It uses the "hex" format which
// is only supported on PostgreSQL 9.0 or newer.
func (a ByteaArray) Value() (driver.Value, error) {
if a == nil {
return nil, nil
}
if n := len(a); n > 0 {
// There will be at least two curly brackets, 2*N bytes of quotes,
// 3*N bytes of hex formatting, and N-1 bytes of delimiters.
size := 1 + 6*n
for _, x := range a {
size += hex.EncodedLen(len(x))
}
b := make([]byte, size)
for i, s := 0, b; i < n; i++ {
o := copy(s, `,"\\x`)
o += hex.Encode(s[o:], a[i])
s[o] = '"'
s = s[o+1:]
}
b[0] = '{'
b[size-1] = '}'
return string(b), nil
}
return "{}", nil
}
// Float64Array represents a one-dimensional array of the PostgreSQL double
// precision type.
type Float64Array []float64
// Scan implements the sql.Scanner interface.
func (a *Float64Array) Scan(src interface{}) error {
switch src := src.(type) {
case []byte:
return a.scanBytes(src)
case string:
return a.scanBytes([]byte(src))
case nil:
*a = nil
return nil
}
return fmt.Errorf("pq: cannot convert %T to Float64Array", src)
}
func (a *Float64Array) scanBytes(src []byte) error {
elems, err := scanLinearArray(src, []byte{','}, "Float64Array")
if err != nil {
return err
}
if *a != nil && len(elems) == 0 {
*a = (*a)[:0]
} else {
b := make(Float64Array, len(elems))
for i, v := range elems {
if b[i], err = strconv.ParseFloat(string(v), 64); err != nil {
return fmt.Errorf("pq: parsing array element index %d: %v", i, err)
}
}
*a = b
}
return nil
}
// Value implements the driver.Valuer interface.
func (a Float64Array) Value() (driver.Value, error) {
if a == nil {
return nil, nil
}
if n := len(a); n > 0 {
// There will be at least two curly brackets, N bytes of values,
// and N-1 bytes of delimiters.
b := make([]byte, 1, 1+2*n)
b[0] = '{'
b = strconv.AppendFloat(b, a[0], 'f', -1, 64)
for i := 1; i < n; i++ {
b = append(b, ',')
b = strconv.AppendFloat(b, a[i], 'f', -1, 64)
}
return string(append(b, '}')), nil
}
return "{}", nil
}
// GenericArray implements the driver.Valuer and sql.Scanner interfaces for
// an array or slice of any dimension.
type GenericArray struct{ A interface{} }
func (GenericArray) evaluateDestination(rt reflect.Type) (reflect.Type, func([]byte, reflect.Value) error, string) {
var assign func([]byte, reflect.Value) error
var del = ","
// TODO calculate the assign function for other types
// TODO repeat this section on the element type of arrays or slices (multidimensional)
{
if reflect.PtrTo(rt).Implements(typeSQLScanner) {
// dest is always addressable because it is an element of a slice.
assign = func(src []byte, dest reflect.Value) (err error) {
ss := dest.Addr().Interface().(sql.Scanner)
if src == nil {
err = ss.Scan(nil)
} else {
err = ss.Scan(src)
}
return
}
goto FoundType
}
assign = func([]byte, reflect.Value) error {
return fmt.Errorf("pq: scanning to %s is not implemented; only sql.Scanner", rt)
}
}
FoundType:
if ad, ok := reflect.Zero(rt).Interface().(ArrayDelimiter); ok {
del = ad.ArrayDelimiter()
}
return rt, assign, del
}
// Scan implements the sql.Scanner interface.
func (a GenericArray) Scan(src interface{}) error {
dpv := reflect.ValueOf(a.A)
switch {
case dpv.Kind() != reflect.Ptr:
return fmt.Errorf("pq: destination %T is not a pointer to array or slice", a.A)
case dpv.IsNil():
return fmt.Errorf("pq: destination %T is nil", a.A)
}
dv := dpv.Elem()
switch dv.Kind() {
case reflect.Slice:
case reflect.Array:
default:
return fmt.Errorf("pq: destination %T is not a pointer to array or slice", a.A)
}
switch src := src.(type) {
case []byte:
return a.scanBytes(src, dv)
case string:
return a.scanBytes([]byte(src), dv)
case nil:
if dv.Kind() == reflect.Slice {
dv.Set(reflect.Zero(dv.Type()))
return nil
}
}
return fmt.Errorf("pq: cannot convert %T to %s", src, dv.Type())
}
func (a GenericArray) scanBytes(src []byte, dv reflect.Value) error {
dtype, assign, del := a.evaluateDestination(dv.Type().Elem())
dims, elems, err := parseArray(src, []byte(del))
if err != nil {
return err
}
// TODO allow multidimensional
if len(dims) > 1 {
return fmt.Errorf("pq: scanning from multidimensional ARRAY%s is not implemented",
strings.Replace(fmt.Sprint(dims), " ", "][", -1))
}
// Treat a zero-dimensional array like an array with a single dimension of zero.
if len(dims) == 0 {
dims = append(dims, 0)
}
for i, rt := 0, dv.Type(); i < len(dims); i, rt = i+1, rt.Elem() {
switch rt.Kind() {
case reflect.Slice:
case reflect.Array:
if rt.Len() != dims[i] {
return fmt.Errorf("pq: cannot convert ARRAY%s to %s",
strings.Replace(fmt.Sprint(dims), " ", "][", -1), dv.Type())
}
default:
// TODO handle multidimensional
}
}
values := reflect.MakeSlice(reflect.SliceOf(dtype), len(elems), len(elems))
for i, e := range elems {
if err := assign(e, values.Index(i)); err != nil {
return fmt.Errorf("pq: parsing array element index %d: %v", i, err)
}
}
// TODO handle multidimensional
switch dv.Kind() {
case reflect.Slice:
dv.Set(values.Slice(0, dims[0]))
case reflect.Array:
for i := 0; i < dims[0]; i++ {
dv.Index(i).Set(values.Index(i))
}
}
return nil
}
// Value implements the driver.Valuer interface.
func (a GenericArray) Value() (driver.Value, error) {
if a.A == nil {
return nil, nil
}
rv := reflect.ValueOf(a.A)
switch rv.Kind() {
case reflect.Slice:
if rv.IsNil() {
return nil, nil
}
case reflect.Array:
default:
return nil, fmt.Errorf("pq: Unable to convert %T to array", a.A)
}
if n := rv.Len(); n > 0 {
// There will be at least two curly brackets, N bytes of values,
// and N-1 bytes of delimiters.
b := make([]byte, 0, 1+2*n)
b, _, err := appendArray(b, rv, n)
return string(b), err
}
return "{}", nil
}
// Int64Array represents a one-dimensional array of the PostgreSQL integer types.
type Int64Array []int64
// Scan implements the sql.Scanner interface.
func (a *Int64Array) Scan(src interface{}) error {
switch src := src.(type) {
case []byte:
return a.scanBytes(src)
case string:
return a.scanBytes([]byte(src))
case nil:
*a = nil
return nil
}
return fmt.Errorf("pq: cannot convert %T to Int64Array", src)
}
func (a *Int64Array) scanBytes(src []byte) error {
elems, err := scanLinearArray(src, []byte{','}, "Int64Array")
if err != nil {
return err
}
if *a != nil && len(elems) == 0 {
*a = (*a)[:0]
} else {
b := make(Int64Array, len(elems))
for i, v := range elems {
if b[i], err = strconv.ParseInt(string(v), 10, 64); err != nil {
return fmt.Errorf("pq: parsing array element index %d: %v", i, err)
}
}
*a = b
}
return nil
}
// Value implements the driver.Valuer interface.
func (a Int64Array) Value() (driver.Value, error) {
if a == nil {
return nil, nil
}
if n := len(a); n > 0 {
// There will be at least two curly brackets, N bytes of values,
// and N-1 bytes of delimiters.
b := make([]byte, 1, 1+2*n)
b[0] = '{'
b = strconv.AppendInt(b, a[0], 10)
for i := 1; i < n; i++ {
b = append(b, ',')
b = strconv.AppendInt(b, a[i], 10)
}
return string(append(b, '}')), nil
}
return "{}", nil
}
// StringArray represents a one-dimensional array of the PostgreSQL character types.
type StringArray []string
// Scan implements the sql.Scanner interface.
func (a *StringArray) Scan(src interface{}) error {
switch src := src.(type) {
case []byte:
return a.scanBytes(src)
case string:
return a.scanBytes([]byte(src))
case nil:
*a = nil
return nil
}
return fmt.Errorf("pq: cannot convert %T to StringArray", src)
}
func (a *StringArray) scanBytes(src []byte) error {
elems, err := scanLinearArray(src, []byte{','}, "StringArray")
if err != nil {
return err
}
if *a != nil && len(elems) == 0 {
*a = (*a)[:0]
} else {
b := make(StringArray, len(elems))
for i, v := range elems {
if b[i] = string(v); v == nil {
return fmt.Errorf("pq: parsing array element index %d: cannot convert nil to string", i)
}
}
*a = b
}
return nil
}
// Value implements the driver.Valuer interface.
func (a StringArray) Value() (driver.Value, error) {
if a == nil {
return nil, nil
}
if n := len(a); n > 0 {
// There will be at least two curly brackets, 2*N bytes of quotes,
// and N-1 bytes of delimiters.
b := make([]byte, 1, 1+3*n)
b[0] = '{'
b = appendArrayQuotedBytes(b, []byte(a[0]))
for i := 1; i < n; i++ {
b = append(b, ',')
b = appendArrayQuotedBytes(b, []byte(a[i]))
}
return string(append(b, '}')), nil
}
return "{}", nil
}
// appendArray appends rv to the buffer, returning the extended buffer and
// the delimiter used between elements.
//
// It panics when n <= 0 or rv's Kind is not reflect.Array nor reflect.Slice.
func appendArray(b []byte, rv reflect.Value, n int) ([]byte, string, error) {
var del string
var err error
b = append(b, '{')
if b, del, err = appendArrayElement(b, rv.Index(0)); err != nil {
return b, del, err
}
for i := 1; i < n; i++ {
b = append(b, del...)
if b, del, err = appendArrayElement(b, rv.Index(i)); err != nil {
return b, del, err
}
}
return append(b, '}'), del, nil
}
// appendArrayElement appends rv to the buffer, returning the extended buffer
// and the delimiter to use before the next element.
//
// When rv's Kind is neither reflect.Array nor reflect.Slice, it is converted
// using driver.DefaultParameterConverter and the resulting []byte or string
// is double-quoted.
//
// See http://www.postgresql.org/docs/current/static/arrays.html#ARRAYS-IO
func appendArrayElement(b []byte, rv reflect.Value) ([]byte, string, error) {
if k := rv.Kind(); k == reflect.Array || k == reflect.Slice {
if t := rv.Type(); t != typeByteSlice && !t.Implements(typeDriverValuer) {
if n := rv.Len(); n > 0 {
return appendArray(b, rv, n)
}
return b, "", nil
}
}
var del = ","
var err error
var iv interface{} = rv.Interface()
if ad, ok := iv.(ArrayDelimiter); ok {
del = ad.ArrayDelimiter()
}
if iv, err = driver.DefaultParameterConverter.ConvertValue(iv); err != nil {
return b, del, err
}
switch v := iv.(type) {
case nil:
return append(b, "NULL"...), del, nil
case []byte:
return appendArrayQuotedBytes(b, v), del, nil
case string:
return appendArrayQuotedBytes(b, []byte(v)), del, nil
}
b, err = appendValue(b, iv)
return b, del, err
}
func appendArrayQuotedBytes(b, v []byte) []byte {
b = append(b, '"')
for {
i := bytes.IndexAny(v, `"\`)
if i < 0 {
b = append(b, v...)
break
}
if i > 0 {
b = append(b, v[:i]...)
}
b = append(b, '\\', v[i])
v = v[i+1:]
}
return append(b, '"')
}
func appendValue(b []byte, v driver.Value) ([]byte, error) {
return append(b, encode(nil, v, 0)...), nil
}
// parseArray extracts the dimensions and elements of an array represented in
// text format. Only representations emitted by the backend are supported.
// Notably, whitespace around brackets and delimiters is significant, and NULL
// is case-sensitive.
//
// See http://www.postgresql.org/docs/current/static/arrays.html#ARRAYS-IO
func parseArray(src, del []byte) (dims []int, elems [][]byte, err error) {
var depth, i int
if len(src) < 1 || src[0] != '{' {
return nil, nil, fmt.Errorf("pq: unable to parse array; expected %q at offset %d", '{', 0)
}
Open:
for i < len(src) {
switch src[i] {
case '{':
depth++
i++
case '}':
elems = make([][]byte, 0)
goto Close
default:
break Open
}
}
dims = make([]int, i)
Element:
for i < len(src) {
switch src[i] {
case '{':
if depth == len(dims) {
break Element
}
depth++
dims[depth-1] = 0
i++
case '"':
var elem = []byte{}
var escape bool
for i++; i < len(src); i++ {
if escape {
elem = append(elem, src[i])
escape = false
} else {
switch src[i] {
default:
elem = append(elem, src[i])
case '\\':
escape = true
case '"':
elems = append(elems, elem)
i++
break Element
}
}
}
default:
for start := i; i < len(src); i++ {
if bytes.HasPrefix(src[i:], del) || src[i] == '}' {
elem := src[start:i]
if len(elem) == 0 {
return nil, nil, fmt.Errorf("pq: unable to parse array; unexpected %q at offset %d", src[i], i)
}
if bytes.Equal(elem, []byte("NULL")) {
elem = nil
}
elems = append(elems, elem)
break Element
}
}
}
}
for i < len(src) {
if bytes.HasPrefix(src[i:], del) && depth > 0 {
dims[depth-1]++
i += len(del)
goto Element
} else if src[i] == '}' && depth > 0 {
dims[depth-1]++
depth--
i++
} else {
return nil, nil, fmt.Errorf("pq: unable to parse array; unexpected %q at offset %d", src[i], i)
}
}
Close:
for i < len(src) {
if src[i] == '}' && depth > 0 {
depth--
i++
} else {
return nil, nil, fmt.Errorf("pq: unable to parse array; unexpected %q at offset %d", src[i], i)
}
}
if depth > 0 {
err = fmt.Errorf("pq: unable to parse array; expected %q at offset %d", '}', i)
}
if err == nil {
for _, d := range dims {
if (len(elems) % d) != 0 {
err = fmt.Errorf("pq: multidimensional arrays must have elements with matching dimensions")
}
}
}
return
}
func scanLinearArray(src, del []byte, typ string) (elems [][]byte, err error) {
dims, elems, err := parseArray(src, del)
if err != nil {
return nil, err
}
if len(dims) > 1 {
return nil, fmt.Errorf("pq: cannot convert ARRAY%s to %s", strings.Replace(fmt.Sprint(dims), " ", "][", -1), typ)
}
return elems, err
}

91
vendor/github.com/lib/pq/buf.go generated vendored Normal file
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@ -0,0 +1,91 @@
package pq
import (
"bytes"
"encoding/binary"
"github.com/lib/pq/oid"
)
type readBuf []byte
func (b *readBuf) int32() (n int) {
n = int(int32(binary.BigEndian.Uint32(*b)))
*b = (*b)[4:]
return
}
func (b *readBuf) oid() (n oid.Oid) {
n = oid.Oid(binary.BigEndian.Uint32(*b))
*b = (*b)[4:]
return
}
// N.B: this is actually an unsigned 16-bit integer, unlike int32
func (b *readBuf) int16() (n int) {
n = int(binary.BigEndian.Uint16(*b))
*b = (*b)[2:]
return
}
func (b *readBuf) string() string {
i := bytes.IndexByte(*b, 0)
if i < 0 {
errorf("invalid message format; expected string terminator")
}
s := (*b)[:i]
*b = (*b)[i+1:]
return string(s)
}
func (b *readBuf) next(n int) (v []byte) {
v = (*b)[:n]
*b = (*b)[n:]
return
}
func (b *readBuf) byte() byte {
return b.next(1)[0]
}
type writeBuf struct {
buf []byte
pos int
}
func (b *writeBuf) int32(n int) {
x := make([]byte, 4)
binary.BigEndian.PutUint32(x, uint32(n))
b.buf = append(b.buf, x...)
}
func (b *writeBuf) int16(n int) {
x := make([]byte, 2)
binary.BigEndian.PutUint16(x, uint16(n))
b.buf = append(b.buf, x...)
}
func (b *writeBuf) string(s string) {
b.buf = append(b.buf, (s + "\000")...)
}
func (b *writeBuf) byte(c byte) {
b.buf = append(b.buf, c)
}
func (b *writeBuf) bytes(v []byte) {
b.buf = append(b.buf, v...)
}
func (b *writeBuf) wrap() []byte {
p := b.buf[b.pos:]
binary.BigEndian.PutUint32(p, uint32(len(p)))
return b.buf
}
func (b *writeBuf) next(c byte) {
p := b.buf[b.pos:]
binary.BigEndian.PutUint32(p, uint32(len(p)))
b.pos = len(b.buf) + 1
b.buf = append(b.buf, c, 0, 0, 0, 0)
}

1919
vendor/github.com/lib/pq/conn.go generated vendored Normal file
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File diff suppressed because it is too large Load diff

149
vendor/github.com/lib/pq/conn_go18.go generated vendored Normal file
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@ -0,0 +1,149 @@
package pq
import (
"context"
"database/sql"
"database/sql/driver"
"fmt"
"io"
"io/ioutil"
"time"
)
// Implement the "QueryerContext" interface
func (cn *conn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Rows, error) {
list := make([]driver.Value, len(args))
for i, nv := range args {
list[i] = nv.Value
}
finish := cn.watchCancel(ctx)
r, err := cn.query(query, list)
if err != nil {
if finish != nil {
finish()
}
return nil, err
}
r.finish = finish
return r, nil
}
// Implement the "ExecerContext" interface
func (cn *conn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
list := make([]driver.Value, len(args))
for i, nv := range args {
list[i] = nv.Value
}
if finish := cn.watchCancel(ctx); finish != nil {
defer finish()
}
return cn.Exec(query, list)
}
// Implement the "ConnBeginTx" interface
func (cn *conn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
var mode string
switch sql.IsolationLevel(opts.Isolation) {
case sql.LevelDefault:
// Don't touch mode: use the server's default
case sql.LevelReadUncommitted:
mode = " ISOLATION LEVEL READ UNCOMMITTED"
case sql.LevelReadCommitted:
mode = " ISOLATION LEVEL READ COMMITTED"
case sql.LevelRepeatableRead:
mode = " ISOLATION LEVEL REPEATABLE READ"
case sql.LevelSerializable:
mode = " ISOLATION LEVEL SERIALIZABLE"
default:
return nil, fmt.Errorf("pq: isolation level not supported: %d", opts.Isolation)
}
if opts.ReadOnly {
mode += " READ ONLY"
} else {
mode += " READ WRITE"
}
tx, err := cn.begin(mode)
if err != nil {
return nil, err
}
cn.txnFinish = cn.watchCancel(ctx)
return tx, nil
}
func (cn *conn) Ping(ctx context.Context) error {
if finish := cn.watchCancel(ctx); finish != nil {
defer finish()
}
rows, err := cn.simpleQuery("SELECT 'lib/pq ping test';")
if err != nil {
return driver.ErrBadConn // https://golang.org/pkg/database/sql/driver/#Pinger
}
rows.Close()
return nil
}
func (cn *conn) watchCancel(ctx context.Context) func() {
if done := ctx.Done(); done != nil {
finished := make(chan struct{})
go func() {
select {
case <-done:
// At this point the function level context is canceled,
// so it must not be used for the additional network
// request to cancel the query.
// Create a new context to pass into the dial.
ctxCancel, cancel := context.WithTimeout(context.Background(), time.Second*10)
defer cancel()
_ = cn.cancel(ctxCancel)
finished <- struct{}{}
case <-finished:
}
}()
return func() {
select {
case <-finished:
case finished <- struct{}{}:
}
}
}
return nil
}
func (cn *conn) cancel(ctx context.Context) error {
c, err := dial(ctx, cn.dialer, cn.opts)
if err != nil {
return err
}
defer c.Close()
{
can := conn{
c: c,
}
err = can.ssl(cn.opts)
if err != nil {
return err
}
w := can.writeBuf(0)
w.int32(80877102) // cancel request code
w.int32(cn.processID)
w.int32(cn.secretKey)
if err := can.sendStartupPacket(w); err != nil {
return err
}
}
// Read until EOF to ensure that the server received the cancel.
{
_, err := io.Copy(ioutil.Discard, c)
return err
}
}

110
vendor/github.com/lib/pq/connector.go generated vendored Normal file
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@ -0,0 +1,110 @@
package pq
import (
"context"
"database/sql/driver"
"errors"
"fmt"
"os"
"strings"
)
// Connector represents a fixed configuration for the pq driver with a given
// name. Connector satisfies the database/sql/driver Connector interface and
// can be used to create any number of DB Conn's via the database/sql OpenDB
// function.
//
// See https://golang.org/pkg/database/sql/driver/#Connector.
// See https://golang.org/pkg/database/sql/#OpenDB.
type Connector struct {
opts values
dialer Dialer
}
// Connect returns a connection to the database using the fixed configuration
// of this Connector. Context is not used.
func (c *Connector) Connect(ctx context.Context) (driver.Conn, error) {
return c.open(ctx)
}
// Driver returnst the underlying driver of this Connector.
func (c *Connector) Driver() driver.Driver {
return &Driver{}
}
// NewConnector returns a connector for the pq driver in a fixed configuration
// with the given dsn. The returned connector can be used to create any number
// of equivalent Conn's. The returned connector is intended to be used with
// database/sql.OpenDB.
//
// See https://golang.org/pkg/database/sql/driver/#Connector.
// See https://golang.org/pkg/database/sql/#OpenDB.
func NewConnector(dsn string) (*Connector, error) {
var err error
o := make(values)
// A number of defaults are applied here, in this order:
//
// * Very low precedence defaults applied in every situation
// * Environment variables
// * Explicitly passed connection information
o["host"] = "localhost"
o["port"] = "5432"
// N.B.: Extra float digits should be set to 3, but that breaks
// Postgres 8.4 and older, where the max is 2.
o["extra_float_digits"] = "2"
for k, v := range parseEnviron(os.Environ()) {
o[k] = v
}
if strings.HasPrefix(dsn, "postgres://") || strings.HasPrefix(dsn, "postgresql://") {
dsn, err = ParseURL(dsn)
if err != nil {
return nil, err
}
}
if err := parseOpts(dsn, o); err != nil {
return nil, err
}
// Use the "fallback" application name if necessary
if fallback, ok := o["fallback_application_name"]; ok {
if _, ok := o["application_name"]; !ok {
o["application_name"] = fallback
}
}
// We can't work with any client_encoding other than UTF-8 currently.
// However, we have historically allowed the user to set it to UTF-8
// explicitly, and there's no reason to break such programs, so allow that.
// Note that the "options" setting could also set client_encoding, but
// parsing its value is not worth it. Instead, we always explicitly send
// client_encoding as a separate run-time parameter, which should override
// anything set in options.
if enc, ok := o["client_encoding"]; ok && !isUTF8(enc) {
return nil, errors.New("client_encoding must be absent or 'UTF8'")
}
o["client_encoding"] = "UTF8"
// DateStyle needs a similar treatment.
if datestyle, ok := o["datestyle"]; ok {
if datestyle != "ISO, MDY" {
return nil, fmt.Errorf("setting datestyle must be absent or %v; got %v", "ISO, MDY", datestyle)
}
} else {
o["datestyle"] = "ISO, MDY"
}
// If a user is not provided by any other means, the last
// resort is to use the current operating system provided user
// name.
if _, ok := o["user"]; !ok {
u, err := userCurrent()
if err != nil {
return nil, err
}
o["user"] = u
}
return &Connector{opts: o, dialer: defaultDialer{}}, nil
}

282
vendor/github.com/lib/pq/copy.go generated vendored Normal file
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@ -0,0 +1,282 @@
package pq
import (
"database/sql/driver"
"encoding/binary"
"errors"
"fmt"
"sync"
)
var (
errCopyInClosed = errors.New("pq: copyin statement has already been closed")
errBinaryCopyNotSupported = errors.New("pq: only text format supported for COPY")
errCopyToNotSupported = errors.New("pq: COPY TO is not supported")
errCopyNotSupportedOutsideTxn = errors.New("pq: COPY is only allowed inside a transaction")
errCopyInProgress = errors.New("pq: COPY in progress")
)
// CopyIn creates a COPY FROM statement which can be prepared with
// Tx.Prepare(). The target table should be visible in search_path.
func CopyIn(table string, columns ...string) string {
stmt := "COPY " + QuoteIdentifier(table) + " ("
for i, col := range columns {
if i != 0 {
stmt += ", "
}
stmt += QuoteIdentifier(col)
}
stmt += ") FROM STDIN"
return stmt
}
// CopyInSchema creates a COPY FROM statement which can be prepared with
// Tx.Prepare().
func CopyInSchema(schema, table string, columns ...string) string {
stmt := "COPY " + QuoteIdentifier(schema) + "." + QuoteIdentifier(table) + " ("
for i, col := range columns {
if i != 0 {
stmt += ", "
}
stmt += QuoteIdentifier(col)
}
stmt += ") FROM STDIN"
return stmt
}
type copyin struct {
cn *conn
buffer []byte
rowData chan []byte
done chan bool
closed bool
sync.Mutex // guards err
err error
}
const ciBufferSize = 64 * 1024
// flush buffer before the buffer is filled up and needs reallocation
const ciBufferFlushSize = 63 * 1024
func (cn *conn) prepareCopyIn(q string) (_ driver.Stmt, err error) {
if !cn.isInTransaction() {
return nil, errCopyNotSupportedOutsideTxn
}
ci := &copyin{
cn: cn,
buffer: make([]byte, 0, ciBufferSize),
rowData: make(chan []byte),
done: make(chan bool, 1),
}
// add CopyData identifier + 4 bytes for message length
ci.buffer = append(ci.buffer, 'd', 0, 0, 0, 0)
b := cn.writeBuf('Q')
b.string(q)
cn.send(b)
awaitCopyInResponse:
for {
t, r := cn.recv1()
switch t {
case 'G':
if r.byte() != 0 {
err = errBinaryCopyNotSupported
break awaitCopyInResponse
}
go ci.resploop()
return ci, nil
case 'H':
err = errCopyToNotSupported
break awaitCopyInResponse
case 'E':
err = parseError(r)
case 'Z':
if err == nil {
ci.setBad()
errorf("unexpected ReadyForQuery in response to COPY")
}
cn.processReadyForQuery(r)
return nil, err
default:
ci.setBad()
errorf("unknown response for copy query: %q", t)
}
}
// something went wrong, abort COPY before we return
b = cn.writeBuf('f')
b.string(err.Error())
cn.send(b)
for {
t, r := cn.recv1()
switch t {
case 'c', 'C', 'E':
case 'Z':
// correctly aborted, we're done
cn.processReadyForQuery(r)
return nil, err
default:
ci.setBad()
errorf("unknown response for CopyFail: %q", t)
}
}
}
func (ci *copyin) flush(buf []byte) {
// set message length (without message identifier)
binary.BigEndian.PutUint32(buf[1:], uint32(len(buf)-1))
_, err := ci.cn.c.Write(buf)
if err != nil {
panic(err)
}
}
func (ci *copyin) resploop() {
for {
var r readBuf
t, err := ci.cn.recvMessage(&r)
if err != nil {
ci.setBad()
ci.setError(err)
ci.done <- true
return
}
switch t {
case 'C':
// complete
case 'N':
// NoticeResponse
case 'Z':
ci.cn.processReadyForQuery(&r)
ci.done <- true
return
case 'E':
err := parseError(&r)
ci.setError(err)
default:
ci.setBad()
ci.setError(fmt.Errorf("unknown response during CopyIn: %q", t))
ci.done <- true
return
}
}
}
func (ci *copyin) setBad() {
ci.Lock()
ci.cn.bad = true
ci.Unlock()
}
func (ci *copyin) isBad() bool {
ci.Lock()
b := ci.cn.bad
ci.Unlock()
return b
}
func (ci *copyin) isErrorSet() bool {
ci.Lock()
isSet := (ci.err != nil)
ci.Unlock()
return isSet
}
// setError() sets ci.err if one has not been set already. Caller must not be
// holding ci.Mutex.
func (ci *copyin) setError(err error) {
ci.Lock()
if ci.err == nil {
ci.err = err
}
ci.Unlock()
}
func (ci *copyin) NumInput() int {
return -1
}
func (ci *copyin) Query(v []driver.Value) (r driver.Rows, err error) {
return nil, ErrNotSupported
}
// Exec inserts values into the COPY stream. The insert is asynchronous
// and Exec can return errors from previous Exec calls to the same
// COPY stmt.
//
// You need to call Exec(nil) to sync the COPY stream and to get any
// errors from pending data, since Stmt.Close() doesn't return errors
// to the user.
func (ci *copyin) Exec(v []driver.Value) (r driver.Result, err error) {
if ci.closed {
return nil, errCopyInClosed
}
if ci.isBad() {
return nil, driver.ErrBadConn
}
defer ci.cn.errRecover(&err)
if ci.isErrorSet() {
return nil, ci.err
}
if len(v) == 0 {
return nil, ci.Close()
}
numValues := len(v)
for i, value := range v {
ci.buffer = appendEncodedText(&ci.cn.parameterStatus, ci.buffer, value)
if i < numValues-1 {
ci.buffer = append(ci.buffer, '\t')
}
}
ci.buffer = append(ci.buffer, '\n')
if len(ci.buffer) > ciBufferFlushSize {
ci.flush(ci.buffer)
// reset buffer, keep bytes for message identifier and length
ci.buffer = ci.buffer[:5]
}
return driver.RowsAffected(0), nil
}
func (ci *copyin) Close() (err error) {
if ci.closed { // Don't do anything, we're already closed
return nil
}
ci.closed = true
if ci.isBad() {
return driver.ErrBadConn
}
defer ci.cn.errRecover(&err)
if len(ci.buffer) > 0 {
ci.flush(ci.buffer)
}
// Avoid touching the scratch buffer as resploop could be using it.
err = ci.cn.sendSimpleMessage('c')
if err != nil {
return err
}
<-ci.done
ci.cn.inCopy = false
if ci.isErrorSet() {
err = ci.err
return err
}
return nil
}

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/*
Package pq is a pure Go Postgres driver for the database/sql package.
In most cases clients will use the database/sql package instead of
using this package directly. For example:
import (
"database/sql"
_ "github.com/lib/pq"
)
func main() {
connStr := "user=pqgotest dbname=pqgotest sslmode=verify-full"
db, err := sql.Open("postgres", connStr)
if err != nil {
log.Fatal(err)
}
age := 21
rows, err := db.Query("SELECT name FROM users WHERE age = $1", age)
…
}
You can also connect to a database using a URL. For example:
connStr := "postgres://pqgotest:password@localhost/pqgotest?sslmode=verify-full"
db, err := sql.Open("postgres", connStr)
Connection String Parameters
Similarly to libpq, when establishing a connection using pq you are expected to
supply a connection string containing zero or more parameters.
A subset of the connection parameters supported by libpq are also supported by pq.
Additionally, pq also lets you specify run-time parameters (such as search_path or work_mem)
directly in the connection string. This is different from libpq, which does not allow
run-time parameters in the connection string, instead requiring you to supply
them in the options parameter.
For compatibility with libpq, the following special connection parameters are
supported:
* dbname - The name of the database to connect to
* user - The user to sign in as
* password - The user's password
* host - The host to connect to. Values that start with / are for unix
domain sockets. (default is localhost)
* port - The port to bind to. (default is 5432)
* sslmode - Whether or not to use SSL (default is require, this is not
the default for libpq)
* fallback_application_name - An application_name to fall back to if one isn't provided.
* connect_timeout - Maximum wait for connection, in seconds. Zero or
not specified means wait indefinitely.
* sslcert - Cert file location. The file must contain PEM encoded data.
* sslkey - Key file location. The file must contain PEM encoded data.
* sslrootcert - The location of the root certificate file. The file
must contain PEM encoded data.
Valid values for sslmode are:
* disable - No SSL
* require - Always SSL (skip verification)
* verify-ca - Always SSL (verify that the certificate presented by the
server was signed by a trusted CA)
* verify-full - Always SSL (verify that the certification presented by
the server was signed by a trusted CA and the server host name
matches the one in the certificate)
See http://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-CONNSTRING
for more information about connection string parameters.
Use single quotes for values that contain whitespace:
"user=pqgotest password='with spaces'"
A backslash will escape the next character in values:
"user=space\ man password='it\'s valid'"
Note that the connection parameter client_encoding (which sets the
text encoding for the connection) may be set but must be "UTF8",
matching with the same rules as Postgres. It is an error to provide
any other value.
In addition to the parameters listed above, any run-time parameter that can be
set at backend start time can be set in the connection string. For more
information, see
http://www.postgresql.org/docs/current/static/runtime-config.html.
Most environment variables as specified at http://www.postgresql.org/docs/current/static/libpq-envars.html
supported by libpq are also supported by pq. If any of the environment
variables not supported by pq are set, pq will panic during connection
establishment. Environment variables have a lower precedence than explicitly
provided connection parameters.
The pgpass mechanism as described in http://www.postgresql.org/docs/current/static/libpq-pgpass.html
is supported, but on Windows PGPASSFILE must be specified explicitly.
Queries
database/sql does not dictate any specific format for parameter
markers in query strings, and pq uses the Postgres-native ordinal markers,
as shown above. The same marker can be reused for the same parameter:
rows, err := db.Query(`SELECT name FROM users WHERE favorite_fruit = $1
OR age BETWEEN $2 AND $2 + 3`, "orange", 64)
pq does not support the LastInsertId() method of the Result type in database/sql.
To return the identifier of an INSERT (or UPDATE or DELETE), use the Postgres
RETURNING clause with a standard Query or QueryRow call:
var userid int
err := db.QueryRow(`INSERT INTO users(name, favorite_fruit, age)
VALUES('beatrice', 'starfruit', 93) RETURNING id`).Scan(&userid)
For more details on RETURNING, see the Postgres documentation:
http://www.postgresql.org/docs/current/static/sql-insert.html
http://www.postgresql.org/docs/current/static/sql-update.html
http://www.postgresql.org/docs/current/static/sql-delete.html
For additional instructions on querying see the documentation for the database/sql package.
Data Types
Parameters pass through driver.DefaultParameterConverter before they are handled
by this package. When the binary_parameters connection option is enabled,
[]byte values are sent directly to the backend as data in binary format.
This package returns the following types for values from the PostgreSQL backend:
- integer types smallint, integer, and bigint are returned as int64
- floating-point types real and double precision are returned as float64
- character types char, varchar, and text are returned as string
- temporal types date, time, timetz, timestamp, and timestamptz are
returned as time.Time
- the boolean type is returned as bool
- the bytea type is returned as []byte
All other types are returned directly from the backend as []byte values in text format.
Errors
pq may return errors of type *pq.Error which can be interrogated for error details:
if err, ok := err.(*pq.Error); ok {
fmt.Println("pq error:", err.Code.Name())
}
See the pq.Error type for details.
Bulk imports
You can perform bulk imports by preparing a statement returned by pq.CopyIn (or
pq.CopyInSchema) in an explicit transaction (sql.Tx). The returned statement
handle can then be repeatedly "executed" to copy data into the target table.
After all data has been processed you should call Exec() once with no arguments
to flush all buffered data. Any call to Exec() might return an error which
should be handled appropriately, but because of the internal buffering an error
returned by Exec() might not be related to the data passed in the call that
failed.
CopyIn uses COPY FROM internally. It is not possible to COPY outside of an
explicit transaction in pq.
Usage example:
txn, err := db.Begin()
if err != nil {
log.Fatal(err)
}
stmt, err := txn.Prepare(pq.CopyIn("users", "name", "age"))
if err != nil {
log.Fatal(err)
}
for _, user := range users {
_, err = stmt.Exec(user.Name, int64(user.Age))
if err != nil {
log.Fatal(err)
}
}
_, err = stmt.Exec()
if err != nil {
log.Fatal(err)
}
err = stmt.Close()
if err != nil {
log.Fatal(err)
}
err = txn.Commit()
if err != nil {
log.Fatal(err)
}
Notifications
PostgreSQL supports a simple publish/subscribe model over database
connections. See http://www.postgresql.org/docs/current/static/sql-notify.html
for more information about the general mechanism.
To start listening for notifications, you first have to open a new connection
to the database by calling NewListener. This connection can not be used for
anything other than LISTEN / NOTIFY. Calling Listen will open a "notification
channel"; once a notification channel is open, a notification generated on that
channel will effect a send on the Listener.Notify channel. A notification
channel will remain open until Unlisten is called, though connection loss might
result in some notifications being lost. To solve this problem, Listener sends
a nil pointer over the Notify channel any time the connection is re-established
following a connection loss. The application can get information about the
state of the underlying connection by setting an event callback in the call to
NewListener.
A single Listener can safely be used from concurrent goroutines, which means
that there is often no need to create more than one Listener in your
application. However, a Listener is always connected to a single database, so
you will need to create a new Listener instance for every database you want to
receive notifications in.
The channel name in both Listen and Unlisten is case sensitive, and can contain
any characters legal in an identifier (see
http://www.postgresql.org/docs/current/static/sql-syntax-lexical.html#SQL-SYNTAX-IDENTIFIERS
for more information). Note that the channel name will be truncated to 63
bytes by the PostgreSQL server.
You can find a complete, working example of Listener usage at
https://godoc.org/github.com/lib/pq/example/listen.
*/
package pq

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vendor/github.com/lib/pq/encode.go generated vendored Normal file
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package pq
import (
"bytes"
"database/sql/driver"
"encoding/binary"
"encoding/hex"
"errors"
"fmt"
"math"
"strconv"
"strings"
"sync"
"time"
"github.com/lib/pq/oid"
)
func binaryEncode(parameterStatus *parameterStatus, x interface{}) []byte {
switch v := x.(type) {
case []byte:
return v
default:
return encode(parameterStatus, x, oid.T_unknown)
}
}
func encode(parameterStatus *parameterStatus, x interface{}, pgtypOid oid.Oid) []byte {
switch v := x.(type) {
case int64:
return strconv.AppendInt(nil, v, 10)
case float64:
return strconv.AppendFloat(nil, v, 'f', -1, 64)
case []byte:
if pgtypOid == oid.T_bytea {
return encodeBytea(parameterStatus.serverVersion, v)
}
return v
case string:
if pgtypOid == oid.T_bytea {
return encodeBytea(parameterStatus.serverVersion, []byte(v))
}
return []byte(v)
case bool:
return strconv.AppendBool(nil, v)
case time.Time:
return formatTs(v)
default:
errorf("encode: unknown type for %T", v)
}
panic("not reached")
}
func decode(parameterStatus *parameterStatus, s []byte, typ oid.Oid, f format) interface{} {
switch f {
case formatBinary:
return binaryDecode(parameterStatus, s, typ)
case formatText:
return textDecode(parameterStatus, s, typ)
default:
panic("not reached")
}
}
func binaryDecode(parameterStatus *parameterStatus, s []byte, typ oid.Oid) interface{} {
switch typ {
case oid.T_bytea:
return s
case oid.T_int8:
return int64(binary.BigEndian.Uint64(s))
case oid.T_int4:
return int64(int32(binary.BigEndian.Uint32(s)))
case oid.T_int2:
return int64(int16(binary.BigEndian.Uint16(s)))
case oid.T_uuid:
b, err := decodeUUIDBinary(s)
if err != nil {
panic(err)
}
return b
default:
errorf("don't know how to decode binary parameter of type %d", uint32(typ))
}
panic("not reached")
}
func textDecode(parameterStatus *parameterStatus, s []byte, typ oid.Oid) interface{} {
switch typ {
case oid.T_char, oid.T_varchar, oid.T_text:
return string(s)
case oid.T_bytea:
b, err := parseBytea(s)
if err != nil {
errorf("%s", err)
}
return b
case oid.T_timestamptz:
return parseTs(parameterStatus.currentLocation, string(s))
case oid.T_timestamp, oid.T_date:
return parseTs(nil, string(s))
case oid.T_time:
return mustParse("15:04:05", typ, s)
case oid.T_timetz:
return mustParse("15:04:05-07", typ, s)
case oid.T_bool:
return s[0] == 't'
case oid.T_int8, oid.T_int4, oid.T_int2:
i, err := strconv.ParseInt(string(s), 10, 64)
if err != nil {
errorf("%s", err)
}
return i
case oid.T_float4, oid.T_float8:
// We always use 64 bit parsing, regardless of whether the input text is for
// a float4 or float8, because clients expect float64s for all float datatypes
// and returning a 32-bit parsed float64 produces lossy results.
f, err := strconv.ParseFloat(string(s), 64)
if err != nil {
errorf("%s", err)
}
return f
}
return s
}
// appendEncodedText encodes item in text format as required by COPY
// and appends to buf
func appendEncodedText(parameterStatus *parameterStatus, buf []byte, x interface{}) []byte {
switch v := x.(type) {
case int64:
return strconv.AppendInt(buf, v, 10)
case float64:
return strconv.AppendFloat(buf, v, 'f', -1, 64)
case []byte:
encodedBytea := encodeBytea(parameterStatus.serverVersion, v)
return appendEscapedText(buf, string(encodedBytea))
case string:
return appendEscapedText(buf, v)
case bool:
return strconv.AppendBool(buf, v)
case time.Time:
return append(buf, formatTs(v)...)
case nil:
return append(buf, "\\N"...)
default:
errorf("encode: unknown type for %T", v)
}
panic("not reached")
}
func appendEscapedText(buf []byte, text string) []byte {
escapeNeeded := false
startPos := 0
var c byte
// check if we need to escape
for i := 0; i < len(text); i++ {
c = text[i]
if c == '\\' || c == '\n' || c == '\r' || c == '\t' {
escapeNeeded = true
startPos = i
break
}
}
if !escapeNeeded {
return append(buf, text...)
}
// copy till first char to escape, iterate the rest
result := append(buf, text[:startPos]...)
for i := startPos; i < len(text); i++ {
c = text[i]
switch c {
case '\\':
result = append(result, '\\', '\\')
case '\n':
result = append(result, '\\', 'n')
case '\r':
result = append(result, '\\', 'r')
case '\t':
result = append(result, '\\', 't')
default:
result = append(result, c)
}
}
return result
}
func mustParse(f string, typ oid.Oid, s []byte) time.Time {
str := string(s)
// check for a 30-minute-offset timezone
if (typ == oid.T_timestamptz || typ == oid.T_timetz) &&
str[len(str)-3] == ':' {
f += ":00"
}
t, err := time.Parse(f, str)
if err != nil {
errorf("decode: %s", err)
}
return t
}
var errInvalidTimestamp = errors.New("invalid timestamp")
type timestampParser struct {
err error
}
func (p *timestampParser) expect(str string, char byte, pos int) {
if p.err != nil {
return
}
if pos+1 > len(str) {
p.err = errInvalidTimestamp
return
}
if c := str[pos]; c != char && p.err == nil {
p.err = fmt.Errorf("expected '%v' at position %v; got '%v'", char, pos, c)
}
}
func (p *timestampParser) mustAtoi(str string, begin int, end int) int {
if p.err != nil {
return 0
}
if begin < 0 || end < 0 || begin > end || end > len(str) {
p.err = errInvalidTimestamp
return 0
}
result, err := strconv.Atoi(str[begin:end])
if err != nil {
if p.err == nil {
p.err = fmt.Errorf("expected number; got '%v'", str)
}
return 0
}
return result
}
// The location cache caches the time zones typically used by the client.
type locationCache struct {
cache map[int]*time.Location
lock sync.Mutex
}
// All connections share the same list of timezones. Benchmarking shows that
// about 5% speed could be gained by putting the cache in the connection and
// losing the mutex, at the cost of a small amount of memory and a somewhat
// significant increase in code complexity.
var globalLocationCache = newLocationCache()
func newLocationCache() *locationCache {
return &locationCache{cache: make(map[int]*time.Location)}
}
// Returns the cached timezone for the specified offset, creating and caching
// it if necessary.
func (c *locationCache) getLocation(offset int) *time.Location {
c.lock.Lock()
defer c.lock.Unlock()
location, ok := c.cache[offset]
if !ok {
location = time.FixedZone("", offset)
c.cache[offset] = location
}
return location
}
var infinityTsEnabled = false
var infinityTsNegative time.Time
var infinityTsPositive time.Time
const (
infinityTsEnabledAlready = "pq: infinity timestamp enabled already"
infinityTsNegativeMustBeSmaller = "pq: infinity timestamp: negative value must be smaller (before) than positive"
)
// EnableInfinityTs controls the handling of Postgres' "-infinity" and
// "infinity" "timestamp"s.
//
// If EnableInfinityTs is not called, "-infinity" and "infinity" will return
// []byte("-infinity") and []byte("infinity") respectively, and potentially
// cause error "sql: Scan error on column index 0: unsupported driver -> Scan
// pair: []uint8 -> *time.Time", when scanning into a time.Time value.
//
// Once EnableInfinityTs has been called, all connections created using this
// driver will decode Postgres' "-infinity" and "infinity" for "timestamp",
// "timestamp with time zone" and "date" types to the predefined minimum and
// maximum times, respectively. When encoding time.Time values, any time which
// equals or precedes the predefined minimum time will be encoded to
// "-infinity". Any values at or past the maximum time will similarly be
// encoded to "infinity".
//
// If EnableInfinityTs is called with negative >= positive, it will panic.
// Calling EnableInfinityTs after a connection has been established results in
// undefined behavior. If EnableInfinityTs is called more than once, it will
// panic.
func EnableInfinityTs(negative time.Time, positive time.Time) {
if infinityTsEnabled {
panic(infinityTsEnabledAlready)
}
if !negative.Before(positive) {
panic(infinityTsNegativeMustBeSmaller)
}
infinityTsEnabled = true
infinityTsNegative = negative
infinityTsPositive = positive
}
/*
* Testing might want to toggle infinityTsEnabled
*/
func disableInfinityTs() {
infinityTsEnabled = false
}
// This is a time function specific to the Postgres default DateStyle
// setting ("ISO, MDY"), the only one we currently support. This
// accounts for the discrepancies between the parsing available with
// time.Parse and the Postgres date formatting quirks.
func parseTs(currentLocation *time.Location, str string) interface{} {
switch str {
case "-infinity":
if infinityTsEnabled {
return infinityTsNegative
}
return []byte(str)
case "infinity":
if infinityTsEnabled {
return infinityTsPositive
}
return []byte(str)
}
t, err := ParseTimestamp(currentLocation, str)
if err != nil {
panic(err)
}
return t
}
// ParseTimestamp parses Postgres' text format. It returns a time.Time in
// currentLocation iff that time's offset agrees with the offset sent from the
// Postgres server. Otherwise, ParseTimestamp returns a time.Time with the
// fixed offset offset provided by the Postgres server.
func ParseTimestamp(currentLocation *time.Location, str string) (time.Time, error) {
p := timestampParser{}
monSep := strings.IndexRune(str, '-')
// this is Gregorian year, not ISO Year
// In Gregorian system, the year 1 BC is followed by AD 1
year := p.mustAtoi(str, 0, monSep)
daySep := monSep + 3
month := p.mustAtoi(str, monSep+1, daySep)
p.expect(str, '-', daySep)
timeSep := daySep + 3
day := p.mustAtoi(str, daySep+1, timeSep)
minLen := monSep + len("01-01") + 1
isBC := strings.HasSuffix(str, " BC")
if isBC {
minLen += 3
}
var hour, minute, second int
if len(str) > minLen {
p.expect(str, ' ', timeSep)
minSep := timeSep + 3
p.expect(str, ':', minSep)
hour = p.mustAtoi(str, timeSep+1, minSep)
secSep := minSep + 3
p.expect(str, ':', secSep)
minute = p.mustAtoi(str, minSep+1, secSep)
secEnd := secSep + 3
second = p.mustAtoi(str, secSep+1, secEnd)
}
remainderIdx := monSep + len("01-01 00:00:00") + 1
// Three optional (but ordered) sections follow: the
// fractional seconds, the time zone offset, and the BC
// designation. We set them up here and adjust the other
// offsets if the preceding sections exist.
nanoSec := 0
tzOff := 0
if remainderIdx < len(str) && str[remainderIdx] == '.' {
fracStart := remainderIdx + 1
fracOff := strings.IndexAny(str[fracStart:], "-+ ")
if fracOff < 0 {
fracOff = len(str) - fracStart
}
fracSec := p.mustAtoi(str, fracStart, fracStart+fracOff)
nanoSec = fracSec * (1000000000 / int(math.Pow(10, float64(fracOff))))
remainderIdx += fracOff + 1
}
if tzStart := remainderIdx; tzStart < len(str) && (str[tzStart] == '-' || str[tzStart] == '+') {
// time zone separator is always '-' or '+' (UTC is +00)
var tzSign int
switch c := str[tzStart]; c {
case '-':
tzSign = -1
case '+':
tzSign = +1
default:
return time.Time{}, fmt.Errorf("expected '-' or '+' at position %v; got %v", tzStart, c)
}
tzHours := p.mustAtoi(str, tzStart+1, tzStart+3)
remainderIdx += 3
var tzMin, tzSec int
if remainderIdx < len(str) && str[remainderIdx] == ':' {
tzMin = p.mustAtoi(str, remainderIdx+1, remainderIdx+3)
remainderIdx += 3
}
if remainderIdx < len(str) && str[remainderIdx] == ':' {
tzSec = p.mustAtoi(str, remainderIdx+1, remainderIdx+3)
remainderIdx += 3
}
tzOff = tzSign * ((tzHours * 60 * 60) + (tzMin * 60) + tzSec)
}
var isoYear int
if isBC {
isoYear = 1 - year
remainderIdx += 3
} else {
isoYear = year
}
if remainderIdx < len(str) {
return time.Time{}, fmt.Errorf("expected end of input, got %v", str[remainderIdx:])
}
t := time.Date(isoYear, time.Month(month), day,
hour, minute, second, nanoSec,
globalLocationCache.getLocation(tzOff))
if currentLocation != nil {
// Set the location of the returned Time based on the session's
// TimeZone value, but only if the local time zone database agrees with
// the remote database on the offset.
lt := t.In(currentLocation)
_, newOff := lt.Zone()
if newOff == tzOff {
t = lt
}
}
return t, p.err
}
// formatTs formats t into a format postgres understands.
func formatTs(t time.Time) []byte {
if infinityTsEnabled {
// t <= -infinity : ! (t > -infinity)
if !t.After(infinityTsNegative) {
return []byte("-infinity")
}
// t >= infinity : ! (!t < infinity)
if !t.Before(infinityTsPositive) {
return []byte("infinity")
}
}
return FormatTimestamp(t)
}
// FormatTimestamp formats t into Postgres' text format for timestamps.
func FormatTimestamp(t time.Time) []byte {
// Need to send dates before 0001 A.D. with " BC" suffix, instead of the
// minus sign preferred by Go.
// Beware, "0000" in ISO is "1 BC", "-0001" is "2 BC" and so on
bc := false
if t.Year() <= 0 {
// flip year sign, and add 1, e.g: "0" will be "1", and "-10" will be "11"
t = t.AddDate((-t.Year())*2+1, 0, 0)
bc = true
}
b := []byte(t.Format("2006-01-02 15:04:05.999999999Z07:00"))
_, offset := t.Zone()
offset = offset % 60
if offset != 0 {
// RFC3339Nano already printed the minus sign
if offset < 0 {
offset = -offset
}
b = append(b, ':')
if offset < 10 {
b = append(b, '0')
}
b = strconv.AppendInt(b, int64(offset), 10)
}
if bc {
b = append(b, " BC"...)
}
return b
}
// Parse a bytea value received from the server. Both "hex" and the legacy
// "escape" format are supported.
func parseBytea(s []byte) (result []byte, err error) {
if len(s) >= 2 && bytes.Equal(s[:2], []byte("\\x")) {
// bytea_output = hex
s = s[2:] // trim off leading "\\x"
result = make([]byte, hex.DecodedLen(len(s)))
_, err := hex.Decode(result, s)
if err != nil {
return nil, err
}
} else {
// bytea_output = escape
for len(s) > 0 {
if s[0] == '\\' {
// escaped '\\'
if len(s) >= 2 && s[1] == '\\' {
result = append(result, '\\')
s = s[2:]
continue
}
// '\\' followed by an octal number
if len(s) < 4 {
return nil, fmt.Errorf("invalid bytea sequence %v", s)
}
r, err := strconv.ParseInt(string(s[1:4]), 8, 9)
if err != nil {
return nil, fmt.Errorf("could not parse bytea value: %s", err.Error())
}
result = append(result, byte(r))
s = s[4:]
} else {
// We hit an unescaped, raw byte. Try to read in as many as
// possible in one go.
i := bytes.IndexByte(s, '\\')
if i == -1 {
result = append(result, s...)
break
}
result = append(result, s[:i]...)
s = s[i:]
}
}
}
return result, nil
}
func encodeBytea(serverVersion int, v []byte) (result []byte) {
if serverVersion >= 90000 {
// Use the hex format if we know that the server supports it
result = make([]byte, 2+hex.EncodedLen(len(v)))
result[0] = '\\'
result[1] = 'x'
hex.Encode(result[2:], v)
} else {
// .. or resort to "escape"
for _, b := range v {
if b == '\\' {
result = append(result, '\\', '\\')
} else if b < 0x20 || b > 0x7e {
result = append(result, []byte(fmt.Sprintf("\\%03o", b))...)
} else {
result = append(result, b)
}
}
}
return result
}
// NullTime represents a time.Time that may be null. NullTime implements the
// sql.Scanner interface so it can be used as a scan destination, similar to
// sql.NullString.
type NullTime struct {
Time time.Time
Valid bool // Valid is true if Time is not NULL
}
// Scan implements the Scanner interface.
func (nt *NullTime) Scan(value interface{}) error {
nt.Time, nt.Valid = value.(time.Time)
return nil
}
// Value implements the driver Valuer interface.
func (nt NullTime) Value() (driver.Value, error) {
if !nt.Valid {
return nil, nil
}
return nt.Time, nil
}

515
vendor/github.com/lib/pq/error.go generated vendored Normal file
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@ -0,0 +1,515 @@
package pq
import (
"database/sql/driver"
"fmt"
"io"
"net"
"runtime"
)
// Error severities
const (
Efatal = "FATAL"
Epanic = "PANIC"
Ewarning = "WARNING"
Enotice = "NOTICE"
Edebug = "DEBUG"
Einfo = "INFO"
Elog = "LOG"
)
// Error represents an error communicating with the server.
//
// See http://www.postgresql.org/docs/current/static/protocol-error-fields.html for details of the fields
type Error struct {
Severity string
Code ErrorCode
Message string
Detail string
Hint string
Position string
InternalPosition string
InternalQuery string
Where string
Schema string
Table string
Column string
DataTypeName string
Constraint string
File string
Line string
Routine string
}
// ErrorCode is a five-character error code.
type ErrorCode string
// Name returns a more human friendly rendering of the error code, namely the
// "condition name".
//
// See http://www.postgresql.org/docs/9.3/static/errcodes-appendix.html for
// details.
func (ec ErrorCode) Name() string {
return errorCodeNames[ec]
}
// ErrorClass is only the class part of an error code.
type ErrorClass string
// Name returns the condition name of an error class. It is equivalent to the
// condition name of the "standard" error code (i.e. the one having the last
// three characters "000").
func (ec ErrorClass) Name() string {
return errorCodeNames[ErrorCode(ec+"000")]
}
// Class returns the error class, e.g. "28".
//
// See http://www.postgresql.org/docs/9.3/static/errcodes-appendix.html for
// details.
func (ec ErrorCode) Class() ErrorClass {
return ErrorClass(ec[0:2])
}
// errorCodeNames is a mapping between the five-character error codes and the
// human readable "condition names". It is derived from the list at
// http://www.postgresql.org/docs/9.3/static/errcodes-appendix.html
var errorCodeNames = map[ErrorCode]string{
// Class 00 - Successful Completion
"00000": "successful_completion",
// Class 01 - Warning
"01000": "warning",
"0100C": "dynamic_result_sets_returned",
"01008": "implicit_zero_bit_padding",
"01003": "null_value_eliminated_in_set_function",
"01007": "privilege_not_granted",
"01006": "privilege_not_revoked",
"01004": "string_data_right_truncation",
"01P01": "deprecated_feature",
// Class 02 - No Data (this is also a warning class per the SQL standard)
"02000": "no_data",
"02001": "no_additional_dynamic_result_sets_returned",
// Class 03 - SQL Statement Not Yet Complete
"03000": "sql_statement_not_yet_complete",
// Class 08 - Connection Exception
"08000": "connection_exception",
"08003": "connection_does_not_exist",
"08006": "connection_failure",
"08001": "sqlclient_unable_to_establish_sqlconnection",
"08004": "sqlserver_rejected_establishment_of_sqlconnection",
"08007": "transaction_resolution_unknown",
"08P01": "protocol_violation",
// Class 09 - Triggered Action Exception
"09000": "triggered_action_exception",
// Class 0A - Feature Not Supported
"0A000": "feature_not_supported",
// Class 0B - Invalid Transaction Initiation
"0B000": "invalid_transaction_initiation",
// Class 0F - Locator Exception
"0F000": "locator_exception",
"0F001": "invalid_locator_specification",
// Class 0L - Invalid Grantor
"0L000": "invalid_grantor",
"0LP01": "invalid_grant_operation",
// Class 0P - Invalid Role Specification
"0P000": "invalid_role_specification",
// Class 0Z - Diagnostics Exception
"0Z000": "diagnostics_exception",
"0Z002": "stacked_diagnostics_accessed_without_active_handler",
// Class 20 - Case Not Found
"20000": "case_not_found",
// Class 21 - Cardinality Violation
"21000": "cardinality_violation",
// Class 22 - Data Exception
"22000": "data_exception",
"2202E": "array_subscript_error",
"22021": "character_not_in_repertoire",
"22008": "datetime_field_overflow",
"22012": "division_by_zero",
"22005": "error_in_assignment",
"2200B": "escape_character_conflict",
"22022": "indicator_overflow",
"22015": "interval_field_overflow",
"2201E": "invalid_argument_for_logarithm",
"22014": "invalid_argument_for_ntile_function",
"22016": "invalid_argument_for_nth_value_function",
"2201F": "invalid_argument_for_power_function",
"2201G": "invalid_argument_for_width_bucket_function",
"22018": "invalid_character_value_for_cast",
"22007": "invalid_datetime_format",
"22019": "invalid_escape_character",
"2200D": "invalid_escape_octet",
"22025": "invalid_escape_sequence",
"22P06": "nonstandard_use_of_escape_character",
"22010": "invalid_indicator_parameter_value",
"22023": "invalid_parameter_value",
"2201B": "invalid_regular_expression",
"2201W": "invalid_row_count_in_limit_clause",
"2201X": "invalid_row_count_in_result_offset_clause",
"22009": "invalid_time_zone_displacement_value",
"2200C": "invalid_use_of_escape_character",
"2200G": "most_specific_type_mismatch",
"22004": "null_value_not_allowed",
"22002": "null_value_no_indicator_parameter",
"22003": "numeric_value_out_of_range",
"2200H": "sequence_generator_limit_exceeded",
"22026": "string_data_length_mismatch",
"22001": "string_data_right_truncation",
"22011": "substring_error",
"22027": "trim_error",
"22024": "unterminated_c_string",
"2200F": "zero_length_character_string",
"22P01": "floating_point_exception",
"22P02": "invalid_text_representation",
"22P03": "invalid_binary_representation",
"22P04": "bad_copy_file_format",
"22P05": "untranslatable_character",
"2200L": "not_an_xml_document",
"2200M": "invalid_xml_document",
"2200N": "invalid_xml_content",
"2200S": "invalid_xml_comment",
"2200T": "invalid_xml_processing_instruction",
// Class 23 - Integrity Constraint Violation
"23000": "integrity_constraint_violation",
"23001": "restrict_violation",
"23502": "not_null_violation",
"23503": "foreign_key_violation",
"23505": "unique_violation",
"23514": "check_violation",
"23P01": "exclusion_violation",
// Class 24 - Invalid Cursor State
"24000": "invalid_cursor_state",
// Class 25 - Invalid Transaction State
"25000": "invalid_transaction_state",
"25001": "active_sql_transaction",
"25002": "branch_transaction_already_active",
"25008": "held_cursor_requires_same_isolation_level",
"25003": "inappropriate_access_mode_for_branch_transaction",
"25004": "inappropriate_isolation_level_for_branch_transaction",
"25005": "no_active_sql_transaction_for_branch_transaction",
"25006": "read_only_sql_transaction",
"25007": "schema_and_data_statement_mixing_not_supported",
"25P01": "no_active_sql_transaction",
"25P02": "in_failed_sql_transaction",
// Class 26 - Invalid SQL Statement Name
"26000": "invalid_sql_statement_name",
// Class 27 - Triggered Data Change Violation
"27000": "triggered_data_change_violation",
// Class 28 - Invalid Authorization Specification
"28000": "invalid_authorization_specification",
"28P01": "invalid_password",
// Class 2B - Dependent Privilege Descriptors Still Exist
"2B000": "dependent_privilege_descriptors_still_exist",
"2BP01": "dependent_objects_still_exist",
// Class 2D - Invalid Transaction Termination
"2D000": "invalid_transaction_termination",
// Class 2F - SQL Routine Exception
"2F000": "sql_routine_exception",
"2F005": "function_executed_no_return_statement",
"2F002": "modifying_sql_data_not_permitted",
"2F003": "prohibited_sql_statement_attempted",
"2F004": "reading_sql_data_not_permitted",
// Class 34 - Invalid Cursor Name
"34000": "invalid_cursor_name",
// Class 38 - External Routine Exception
"38000": "external_routine_exception",
"38001": "containing_sql_not_permitted",
"38002": "modifying_sql_data_not_permitted",
"38003": "prohibited_sql_statement_attempted",
"38004": "reading_sql_data_not_permitted",
// Class 39 - External Routine Invocation Exception
"39000": "external_routine_invocation_exception",
"39001": "invalid_sqlstate_returned",
"39004": "null_value_not_allowed",
"39P01": "trigger_protocol_violated",
"39P02": "srf_protocol_violated",
// Class 3B - Savepoint Exception
"3B000": "savepoint_exception",
"3B001": "invalid_savepoint_specification",
// Class 3D - Invalid Catalog Name
"3D000": "invalid_catalog_name",
// Class 3F - Invalid Schema Name
"3F000": "invalid_schema_name",
// Class 40 - Transaction Rollback
"40000": "transaction_rollback",
"40002": "transaction_integrity_constraint_violation",
"40001": "serialization_failure",
"40003": "statement_completion_unknown",
"40P01": "deadlock_detected",
// Class 42 - Syntax Error or Access Rule Violation
"42000": "syntax_error_or_access_rule_violation",
"42601": "syntax_error",
"42501": "insufficient_privilege",
"42846": "cannot_coerce",
"42803": "grouping_error",
"42P20": "windowing_error",
"42P19": "invalid_recursion",
"42830": "invalid_foreign_key",
"42602": "invalid_name",
"42622": "name_too_long",
"42939": "reserved_name",
"42804": "datatype_mismatch",
"42P18": "indeterminate_datatype",
"42P21": "collation_mismatch",
"42P22": "indeterminate_collation",
"42809": "wrong_object_type",
"42703": "undefined_column",
"42883": "undefined_function",
"42P01": "undefined_table",
"42P02": "undefined_parameter",
"42704": "undefined_object",
"42701": "duplicate_column",
"42P03": "duplicate_cursor",
"42P04": "duplicate_database",
"42723": "duplicate_function",
"42P05": "duplicate_prepared_statement",
"42P06": "duplicate_schema",
"42P07": "duplicate_table",
"42712": "duplicate_alias",
"42710": "duplicate_object",
"42702": "ambiguous_column",
"42725": "ambiguous_function",
"42P08": "ambiguous_parameter",
"42P09": "ambiguous_alias",
"42P10": "invalid_column_reference",
"42611": "invalid_column_definition",
"42P11": "invalid_cursor_definition",
"42P12": "invalid_database_definition",
"42P13": "invalid_function_definition",
"42P14": "invalid_prepared_statement_definition",
"42P15": "invalid_schema_definition",
"42P16": "invalid_table_definition",
"42P17": "invalid_object_definition",
// Class 44 - WITH CHECK OPTION Violation
"44000": "with_check_option_violation",
// Class 53 - Insufficient Resources
"53000": "insufficient_resources",
"53100": "disk_full",
"53200": "out_of_memory",
"53300": "too_many_connections",
"53400": "configuration_limit_exceeded",
// Class 54 - Program Limit Exceeded
"54000": "program_limit_exceeded",
"54001": "statement_too_complex",
"54011": "too_many_columns",
"54023": "too_many_arguments",
// Class 55 - Object Not In Prerequisite State
"55000": "object_not_in_prerequisite_state",
"55006": "object_in_use",
"55P02": "cant_change_runtime_param",
"55P03": "lock_not_available",
// Class 57 - Operator Intervention
"57000": "operator_intervention",
"57014": "query_canceled",
"57P01": "admin_shutdown",
"57P02": "crash_shutdown",
"57P03": "cannot_connect_now",
"57P04": "database_dropped",
// Class 58 - System Error (errors external to PostgreSQL itself)
"58000": "system_error",
"58030": "io_error",
"58P01": "undefined_file",
"58P02": "duplicate_file",
// Class F0 - Configuration File Error
"F0000": "config_file_error",
"F0001": "lock_file_exists",
// Class HV - Foreign Data Wrapper Error (SQL/MED)
"HV000": "fdw_error",
"HV005": "fdw_column_name_not_found",
"HV002": "fdw_dynamic_parameter_value_needed",
"HV010": "fdw_function_sequence_error",
"HV021": "fdw_inconsistent_descriptor_information",
"HV024": "fdw_invalid_attribute_value",
"HV007": "fdw_invalid_column_name",
"HV008": "fdw_invalid_column_number",
"HV004": "fdw_invalid_data_type",
"HV006": "fdw_invalid_data_type_descriptors",
"HV091": "fdw_invalid_descriptor_field_identifier",
"HV00B": "fdw_invalid_handle",
"HV00C": "fdw_invalid_option_index",
"HV00D": "fdw_invalid_option_name",
"HV090": "fdw_invalid_string_length_or_buffer_length",
"HV00A": "fdw_invalid_string_format",
"HV009": "fdw_invalid_use_of_null_pointer",
"HV014": "fdw_too_many_handles",
"HV001": "fdw_out_of_memory",
"HV00P": "fdw_no_schemas",
"HV00J": "fdw_option_name_not_found",
"HV00K": "fdw_reply_handle",
"HV00Q": "fdw_schema_not_found",
"HV00R": "fdw_table_not_found",
"HV00L": "fdw_unable_to_create_execution",
"HV00M": "fdw_unable_to_create_reply",
"HV00N": "fdw_unable_to_establish_connection",
// Class P0 - PL/pgSQL Error
"P0000": "plpgsql_error",
"P0001": "raise_exception",
"P0002": "no_data_found",
"P0003": "too_many_rows",
// Class XX - Internal Error
"XX000": "internal_error",
"XX001": "data_corrupted",
"XX002": "index_corrupted",
}
func parseError(r *readBuf) *Error {
err := new(Error)
for t := r.byte(); t != 0; t = r.byte() {
msg := r.string()
switch t {
case 'S':
err.Severity = msg
case 'C':
err.Code = ErrorCode(msg)
case 'M':
err.Message = msg
case 'D':
err.Detail = msg
case 'H':
err.Hint = msg
case 'P':
err.Position = msg
case 'p':
err.InternalPosition = msg
case 'q':
err.InternalQuery = msg
case 'W':
err.Where = msg
case 's':
err.Schema = msg
case 't':
err.Table = msg
case 'c':
err.Column = msg
case 'd':
err.DataTypeName = msg
case 'n':
err.Constraint = msg
case 'F':
err.File = msg
case 'L':
err.Line = msg
case 'R':
err.Routine = msg
}
}
return err
}
// Fatal returns true if the Error Severity is fatal.
func (err *Error) Fatal() bool {
return err.Severity == Efatal
}
// Get implements the legacy PGError interface. New code should use the fields
// of the Error struct directly.
func (err *Error) Get(k byte) (v string) {
switch k {
case 'S':
return err.Severity
case 'C':
return string(err.Code)
case 'M':
return err.Message
case 'D':
return err.Detail
case 'H':
return err.Hint
case 'P':
return err.Position
case 'p':
return err.InternalPosition
case 'q':
return err.InternalQuery
case 'W':
return err.Where
case 's':
return err.Schema
case 't':
return err.Table
case 'c':
return err.Column
case 'd':
return err.DataTypeName
case 'n':
return err.Constraint
case 'F':
return err.File
case 'L':
return err.Line
case 'R':
return err.Routine
}
return ""
}
func (err Error) Error() string {
return "pq: " + err.Message
}
// PGError is an interface used by previous versions of pq. It is provided
// only to support legacy code. New code should use the Error type.
type PGError interface {
Error() string
Fatal() bool
Get(k byte) (v string)
}
func errorf(s string, args ...interface{}) {
panic(fmt.Errorf("pq: %s", fmt.Sprintf(s, args...)))
}
// TODO(ainar-g) Rename to errorf after removing panics.
func fmterrorf(s string, args ...interface{}) error {
return fmt.Errorf("pq: %s", fmt.Sprintf(s, args...))
}
func errRecoverNoErrBadConn(err *error) {
e := recover()
if e == nil {
// Do nothing
return
}
var ok bool
*err, ok = e.(error)
if !ok {
*err = fmt.Errorf("pq: unexpected error: %#v", e)
}
}
func (c *conn) errRecover(err *error) {
e := recover()
switch v := e.(type) {
case nil:
// Do nothing
case runtime.Error:
c.bad = true
panic(v)
case *Error:
if v.Fatal() {
*err = driver.ErrBadConn
} else {
*err = v
}
case *net.OpError:
c.bad = true
*err = v
case error:
if v == io.EOF || v.(error).Error() == "remote error: handshake failure" {
*err = driver.ErrBadConn
} else {
*err = v
}
default:
c.bad = true
panic(fmt.Sprintf("unknown error: %#v", e))
}
// Any time we return ErrBadConn, we need to remember it since *Tx doesn't
// mark the connection bad in database/sql.
if *err == driver.ErrBadConn {
c.bad = true
}
}

797
vendor/github.com/lib/pq/notify.go generated vendored Normal file
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package pq
// Package pq is a pure Go Postgres driver for the database/sql package.
// This module contains support for Postgres LISTEN/NOTIFY.
import (
"errors"
"fmt"
"sync"
"sync/atomic"
"time"
)
// Notification represents a single notification from the database.
type Notification struct {
// Process ID (PID) of the notifying postgres backend.
BePid int
// Name of the channel the notification was sent on.
Channel string
// Payload, or the empty string if unspecified.
Extra string
}
func recvNotification(r *readBuf) *Notification {
bePid := r.int32()
channel := r.string()
extra := r.string()
return &Notification{bePid, channel, extra}
}
const (
connStateIdle int32 = iota
connStateExpectResponse
connStateExpectReadyForQuery
)
type message struct {
typ byte
err error
}
var errListenerConnClosed = errors.New("pq: ListenerConn has been closed")
// ListenerConn is a low-level interface for waiting for notifications. You
// should use Listener instead.
type ListenerConn struct {
// guards cn and err
connectionLock sync.Mutex
cn *conn
err error
connState int32
// the sending goroutine will be holding this lock
senderLock sync.Mutex
notificationChan chan<- *Notification
replyChan chan message
}
// NewListenerConn creates a new ListenerConn. Use NewListener instead.
func NewListenerConn(name string, notificationChan chan<- *Notification) (*ListenerConn, error) {
return newDialListenerConn(defaultDialer{}, name, notificationChan)
}
func newDialListenerConn(d Dialer, name string, c chan<- *Notification) (*ListenerConn, error) {
cn, err := DialOpen(d, name)
if err != nil {
return nil, err
}
l := &ListenerConn{
cn: cn.(*conn),
notificationChan: c,
connState: connStateIdle,
replyChan: make(chan message, 2),
}
go l.listenerConnMain()
return l, nil
}
// We can only allow one goroutine at a time to be running a query on the
// connection for various reasons, so the goroutine sending on the connection
// must be holding senderLock.
//
// Returns an error if an unrecoverable error has occurred and the ListenerConn
// should be abandoned.
func (l *ListenerConn) acquireSenderLock() error {
// we must acquire senderLock first to avoid deadlocks; see ExecSimpleQuery
l.senderLock.Lock()
l.connectionLock.Lock()
err := l.err
l.connectionLock.Unlock()
if err != nil {
l.senderLock.Unlock()
return err
}
return nil
}
func (l *ListenerConn) releaseSenderLock() {
l.senderLock.Unlock()
}
// setState advances the protocol state to newState. Returns false if moving
// to that state from the current state is not allowed.
func (l *ListenerConn) setState(newState int32) bool {
var expectedState int32
switch newState {
case connStateIdle:
expectedState = connStateExpectReadyForQuery
case connStateExpectResponse:
expectedState = connStateIdle
case connStateExpectReadyForQuery:
expectedState = connStateExpectResponse
default:
panic(fmt.Sprintf("unexpected listenerConnState %d", newState))
}
return atomic.CompareAndSwapInt32(&l.connState, expectedState, newState)
}
// Main logic is here: receive messages from the postgres backend, forward
// notifications and query replies and keep the internal state in sync with the
// protocol state. Returns when the connection has been lost, is about to go
// away or should be discarded because we couldn't agree on the state with the
// server backend.
func (l *ListenerConn) listenerConnLoop() (err error) {
defer errRecoverNoErrBadConn(&err)
r := &readBuf{}
for {
t, err := l.cn.recvMessage(r)
if err != nil {
return err
}
switch t {
case 'A':
// recvNotification copies all the data so we don't need to worry
// about the scratch buffer being overwritten.
l.notificationChan <- recvNotification(r)
case 'T', 'D':
// only used by tests; ignore
case 'E':
// We might receive an ErrorResponse even when not in a query; it
// is expected that the server will close the connection after
// that, but we should make sure that the error we display is the
// one from the stray ErrorResponse, not io.ErrUnexpectedEOF.
if !l.setState(connStateExpectReadyForQuery) {
return parseError(r)
}
l.replyChan <- message{t, parseError(r)}
case 'C', 'I':
if !l.setState(connStateExpectReadyForQuery) {
// protocol out of sync
return fmt.Errorf("unexpected CommandComplete")
}
// ExecSimpleQuery doesn't need to know about this message
case 'Z':
if !l.setState(connStateIdle) {
// protocol out of sync
return fmt.Errorf("unexpected ReadyForQuery")
}
l.replyChan <- message{t, nil}
case 'N', 'S':
// ignore
default:
return fmt.Errorf("unexpected message %q from server in listenerConnLoop", t)
}
}
}
// This is the main routine for the goroutine receiving on the database
// connection. Most of the main logic is in listenerConnLoop.
func (l *ListenerConn) listenerConnMain() {
err := l.listenerConnLoop()
// listenerConnLoop terminated; we're done, but we still have to clean up.
// Make sure nobody tries to start any new queries by making sure the err
// pointer is set. It is important that we do not overwrite its value; a
// connection could be closed by either this goroutine or one sending on
// the connection -- whoever closes the connection is assumed to have the
// more meaningful error message (as the other one will probably get
// net.errClosed), so that goroutine sets the error we expose while the
// other error is discarded. If the connection is lost while two
// goroutines are operating on the socket, it probably doesn't matter which
// error we expose so we don't try to do anything more complex.
l.connectionLock.Lock()
if l.err == nil {
l.err = err
}
l.cn.Close()
l.connectionLock.Unlock()
// There might be a query in-flight; make sure nobody's waiting for a
// response to it, since there's not going to be one.
close(l.replyChan)
// let the listener know we're done
close(l.notificationChan)
// this ListenerConn is done
}
// Listen sends a LISTEN query to the server. See ExecSimpleQuery.
func (l *ListenerConn) Listen(channel string) (bool, error) {
return l.ExecSimpleQuery("LISTEN " + QuoteIdentifier(channel))
}
// Unlisten sends an UNLISTEN query to the server. See ExecSimpleQuery.
func (l *ListenerConn) Unlisten(channel string) (bool, error) {
return l.ExecSimpleQuery("UNLISTEN " + QuoteIdentifier(channel))
}
// UnlistenAll sends an `UNLISTEN *` query to the server. See ExecSimpleQuery.
func (l *ListenerConn) UnlistenAll() (bool, error) {
return l.ExecSimpleQuery("UNLISTEN *")
}
// Ping the remote server to make sure it's alive. Non-nil error means the
// connection has failed and should be abandoned.
func (l *ListenerConn) Ping() error {
sent, err := l.ExecSimpleQuery("")
if !sent {
return err
}
if err != nil {
// shouldn't happen
panic(err)
}
return nil
}
// Attempt to send a query on the connection. Returns an error if sending the
// query failed, and the caller should initiate closure of this connection.
// The caller must be holding senderLock (see acquireSenderLock and
// releaseSenderLock).
func (l *ListenerConn) sendSimpleQuery(q string) (err error) {
defer errRecoverNoErrBadConn(&err)
// must set connection state before sending the query
if !l.setState(connStateExpectResponse) {
panic("two queries running at the same time")
}
// Can't use l.cn.writeBuf here because it uses the scratch buffer which
// might get overwritten by listenerConnLoop.
b := &writeBuf{
buf: []byte("Q\x00\x00\x00\x00"),
pos: 1,
}
b.string(q)
l.cn.send(b)
return nil
}
// ExecSimpleQuery executes a "simple query" (i.e. one with no bindable
// parameters) on the connection. The possible return values are:
// 1) "executed" is true; the query was executed to completion on the
// database server. If the query failed, err will be set to the error
// returned by the database, otherwise err will be nil.
// 2) If "executed" is false, the query could not be executed on the remote
// server. err will be non-nil.
//
// After a call to ExecSimpleQuery has returned an executed=false value, the
// connection has either been closed or will be closed shortly thereafter, and
// all subsequently executed queries will return an error.
func (l *ListenerConn) ExecSimpleQuery(q string) (executed bool, err error) {
if err = l.acquireSenderLock(); err != nil {
return false, err
}
defer l.releaseSenderLock()
err = l.sendSimpleQuery(q)
if err != nil {
// We can't know what state the protocol is in, so we need to abandon
// this connection.
l.connectionLock.Lock()
// Set the error pointer if it hasn't been set already; see
// listenerConnMain.
if l.err == nil {
l.err = err
}
l.connectionLock.Unlock()
l.cn.c.Close()
return false, err
}
// now we just wait for a reply..
for {
m, ok := <-l.replyChan
if !ok {
// We lost the connection to server, don't bother waiting for a
// a response. err should have been set already.
l.connectionLock.Lock()
err := l.err
l.connectionLock.Unlock()
return false, err
}
switch m.typ {
case 'Z':
// sanity check
if m.err != nil {
panic("m.err != nil")
}
// done; err might or might not be set
return true, err
case 'E':
// sanity check
if m.err == nil {
panic("m.err == nil")
}
// server responded with an error; ReadyForQuery to follow
err = m.err
default:
return false, fmt.Errorf("unknown response for simple query: %q", m.typ)
}
}
}
// Close closes the connection.
func (l *ListenerConn) Close() error {
l.connectionLock.Lock()
if l.err != nil {
l.connectionLock.Unlock()
return errListenerConnClosed
}
l.err = errListenerConnClosed
l.connectionLock.Unlock()
// We can't send anything on the connection without holding senderLock.
// Simply close the net.Conn to wake up everyone operating on it.
return l.cn.c.Close()
}
// Err returns the reason the connection was closed. It is not safe to call
// this function until l.Notify has been closed.
func (l *ListenerConn) Err() error {
return l.err
}
var errListenerClosed = errors.New("pq: Listener has been closed")
// ErrChannelAlreadyOpen is returned from Listen when a channel is already
// open.
var ErrChannelAlreadyOpen = errors.New("pq: channel is already open")
// ErrChannelNotOpen is returned from Unlisten when a channel is not open.
var ErrChannelNotOpen = errors.New("pq: channel is not open")
// ListenerEventType is an enumeration of listener event types.
type ListenerEventType int
const (
// ListenerEventConnected is emitted only when the database connection
// has been initially initialized. The err argument of the callback
// will always be nil.
ListenerEventConnected ListenerEventType = iota
// ListenerEventDisconnected is emitted after a database connection has
// been lost, either because of an error or because Close has been
// called. The err argument will be set to the reason the database
// connection was lost.
ListenerEventDisconnected
// ListenerEventReconnected is emitted after a database connection has
// been re-established after connection loss. The err argument of the
// callback will always be nil. After this event has been emitted, a
// nil pq.Notification is sent on the Listener.Notify channel.
ListenerEventReconnected
// ListenerEventConnectionAttemptFailed is emitted after a connection
// to the database was attempted, but failed. The err argument will be
// set to an error describing why the connection attempt did not
// succeed.
ListenerEventConnectionAttemptFailed
)
// EventCallbackType is the event callback type. See also ListenerEventType
// constants' documentation.
type EventCallbackType func(event ListenerEventType, err error)
// Listener provides an interface for listening to notifications from a
// PostgreSQL database. For general usage information, see section
// "Notifications".
//
// Listener can safely be used from concurrently running goroutines.
type Listener struct {
// Channel for receiving notifications from the database. In some cases a
// nil value will be sent. See section "Notifications" above.
Notify chan *Notification
name string
minReconnectInterval time.Duration
maxReconnectInterval time.Duration
dialer Dialer
eventCallback EventCallbackType
lock sync.Mutex
isClosed bool
reconnectCond *sync.Cond
cn *ListenerConn
connNotificationChan <-chan *Notification
channels map[string]struct{}
}
// NewListener creates a new database connection dedicated to LISTEN / NOTIFY.
//
// name should be set to a connection string to be used to establish the
// database connection (see section "Connection String Parameters" above).
//
// minReconnectInterval controls the duration to wait before trying to
// re-establish the database connection after connection loss. After each
// consecutive failure this interval is doubled, until maxReconnectInterval is
// reached. Successfully completing the connection establishment procedure
// resets the interval back to minReconnectInterval.
//
// The last parameter eventCallback can be set to a function which will be
// called by the Listener when the state of the underlying database connection
// changes. This callback will be called by the goroutine which dispatches the
// notifications over the Notify channel, so you should try to avoid doing
// potentially time-consuming operations from the callback.
func NewListener(name string,
minReconnectInterval time.Duration,
maxReconnectInterval time.Duration,
eventCallback EventCallbackType) *Listener {
return NewDialListener(defaultDialer{}, name, minReconnectInterval, maxReconnectInterval, eventCallback)
}
// NewDialListener is like NewListener but it takes a Dialer.
func NewDialListener(d Dialer,
name string,
minReconnectInterval time.Duration,
maxReconnectInterval time.Duration,
eventCallback EventCallbackType) *Listener {
l := &Listener{
name: name,
minReconnectInterval: minReconnectInterval,
maxReconnectInterval: maxReconnectInterval,
dialer: d,
eventCallback: eventCallback,
channels: make(map[string]struct{}),
Notify: make(chan *Notification, 32),
}
l.reconnectCond = sync.NewCond(&l.lock)
go l.listenerMain()
return l
}
// NotificationChannel returns the notification channel for this listener.
// This is the same channel as Notify, and will not be recreated during the
// life time of the Listener.
func (l *Listener) NotificationChannel() <-chan *Notification {
return l.Notify
}
// Listen starts listening for notifications on a channel. Calls to this
// function will block until an acknowledgement has been received from the
// server. Note that Listener automatically re-establishes the connection
// after connection loss, so this function may block indefinitely if the
// connection can not be re-established.
//
// Listen will only fail in three conditions:
// 1) The channel is already open. The returned error will be
// ErrChannelAlreadyOpen.
// 2) The query was executed on the remote server, but PostgreSQL returned an
// error message in response to the query. The returned error will be a
// pq.Error containing the information the server supplied.
// 3) Close is called on the Listener before the request could be completed.
//
// The channel name is case-sensitive.
func (l *Listener) Listen(channel string) error {
l.lock.Lock()
defer l.lock.Unlock()
if l.isClosed {
return errListenerClosed
}
// The server allows you to issue a LISTEN on a channel which is already
// open, but it seems useful to be able to detect this case to spot for
// mistakes in application logic. If the application genuinely does't
// care, it can check the exported error and ignore it.
_, exists := l.channels[channel]
if exists {
return ErrChannelAlreadyOpen
}
if l.cn != nil {
// If gotResponse is true but error is set, the query was executed on
// the remote server, but resulted in an error. This should be
// relatively rare, so it's fine if we just pass the error to our
// caller. However, if gotResponse is false, we could not complete the
// query on the remote server and our underlying connection is about
// to go away, so we only add relname to l.channels, and wait for
// resync() to take care of the rest.
gotResponse, err := l.cn.Listen(channel)
if gotResponse && err != nil {
return err
}
}
l.channels[channel] = struct{}{}
for l.cn == nil {
l.reconnectCond.Wait()
// we let go of the mutex for a while
if l.isClosed {
return errListenerClosed
}
}
return nil
}
// Unlisten removes a channel from the Listener's channel list. Returns
// ErrChannelNotOpen if the Listener is not listening on the specified channel.
// Returns immediately with no error if there is no connection. Note that you
// might still get notifications for this channel even after Unlisten has
// returned.
//
// The channel name is case-sensitive.
func (l *Listener) Unlisten(channel string) error {
l.lock.Lock()
defer l.lock.Unlock()
if l.isClosed {
return errListenerClosed
}
// Similarly to LISTEN, this is not an error in Postgres, but it seems
// useful to distinguish from the normal conditions.
_, exists := l.channels[channel]
if !exists {
return ErrChannelNotOpen
}
if l.cn != nil {
// Similarly to Listen (see comment in that function), the caller
// should only be bothered with an error if it came from the backend as
// a response to our query.
gotResponse, err := l.cn.Unlisten(channel)
if gotResponse && err != nil {
return err
}
}
// Don't bother waiting for resync if there's no connection.
delete(l.channels, channel)
return nil
}
// UnlistenAll removes all channels from the Listener's channel list. Returns
// immediately with no error if there is no connection. Note that you might
// still get notifications for any of the deleted channels even after
// UnlistenAll has returned.
func (l *Listener) UnlistenAll() error {
l.lock.Lock()
defer l.lock.Unlock()
if l.isClosed {
return errListenerClosed
}
if l.cn != nil {
// Similarly to Listen (see comment in that function), the caller
// should only be bothered with an error if it came from the backend as
// a response to our query.
gotResponse, err := l.cn.UnlistenAll()
if gotResponse && err != nil {
return err
}
}
// Don't bother waiting for resync if there's no connection.
l.channels = make(map[string]struct{})
return nil
}
// Ping the remote server to make sure it's alive. Non-nil return value means
// that there is no active connection.
func (l *Listener) Ping() error {
l.lock.Lock()
defer l.lock.Unlock()
if l.isClosed {
return errListenerClosed
}
if l.cn == nil {
return errors.New("no connection")
}
return l.cn.Ping()
}
// Clean up after losing the server connection. Returns l.cn.Err(), which
// should have the reason the connection was lost.
func (l *Listener) disconnectCleanup() error {
l.lock.Lock()
defer l.lock.Unlock()
// sanity check; can't look at Err() until the channel has been closed
select {
case _, ok := <-l.connNotificationChan:
if ok {
panic("connNotificationChan not closed")
}
default:
panic("connNotificationChan not closed")
}
err := l.cn.Err()
l.cn.Close()
l.cn = nil
return err
}
// Synchronize the list of channels we want to be listening on with the server
// after the connection has been established.
func (l *Listener) resync(cn *ListenerConn, notificationChan <-chan *Notification) error {
doneChan := make(chan error)
go func(notificationChan <-chan *Notification) {
for channel := range l.channels {
// If we got a response, return that error to our caller as it's
// going to be more descriptive than cn.Err().
gotResponse, err := cn.Listen(channel)
if gotResponse && err != nil {
doneChan <- err
return
}
// If we couldn't reach the server, wait for notificationChan to
// close and then return the error message from the connection, as
// per ListenerConn's interface.
if err != nil {
for range notificationChan {
}
doneChan <- cn.Err()
return
}
}
doneChan <- nil
}(notificationChan)
// Ignore notifications while synchronization is going on to avoid
// deadlocks. We have to send a nil notification over Notify anyway as
// we can't possibly know which notifications (if any) were lost while
// the connection was down, so there's no reason to try and process
// these messages at all.
for {
select {
case _, ok := <-notificationChan:
if !ok {
notificationChan = nil
}
case err := <-doneChan:
return err
}
}
}
// caller should NOT be holding l.lock
func (l *Listener) closed() bool {
l.lock.Lock()
defer l.lock.Unlock()
return l.isClosed
}
func (l *Listener) connect() error {
notificationChan := make(chan *Notification, 32)
cn, err := newDialListenerConn(l.dialer, l.name, notificationChan)
if err != nil {
return err
}
l.lock.Lock()
defer l.lock.Unlock()
err = l.resync(cn, notificationChan)
if err != nil {
cn.Close()
return err
}
l.cn = cn
l.connNotificationChan = notificationChan
l.reconnectCond.Broadcast()
return nil
}
// Close disconnects the Listener from the database and shuts it down.
// Subsequent calls to its methods will return an error. Close returns an
// error if the connection has already been closed.
func (l *Listener) Close() error {
l.lock.Lock()
defer l.lock.Unlock()
if l.isClosed {
return errListenerClosed
}
if l.cn != nil {
l.cn.Close()
}
l.isClosed = true
// Unblock calls to Listen()
l.reconnectCond.Broadcast()
return nil
}
func (l *Listener) emitEvent(event ListenerEventType, err error) {
if l.eventCallback != nil {
l.eventCallback(event, err)
}
}
// Main logic here: maintain a connection to the server when possible, wait
// for notifications and emit events.
func (l *Listener) listenerConnLoop() {
var nextReconnect time.Time
reconnectInterval := l.minReconnectInterval
for {
for {
err := l.connect()
if err == nil {
break
}
if l.closed() {
return
}
l.emitEvent(ListenerEventConnectionAttemptFailed, err)
time.Sleep(reconnectInterval)
reconnectInterval *= 2
if reconnectInterval > l.maxReconnectInterval {
reconnectInterval = l.maxReconnectInterval
}
}
if nextReconnect.IsZero() {
l.emitEvent(ListenerEventConnected, nil)
} else {
l.emitEvent(ListenerEventReconnected, nil)
l.Notify <- nil
}
reconnectInterval = l.minReconnectInterval
nextReconnect = time.Now().Add(reconnectInterval)
for {
notification, ok := <-l.connNotificationChan
if !ok {
// lost connection, loop again
break
}
l.Notify <- notification
}
err := l.disconnectCleanup()
if l.closed() {
return
}
l.emitEvent(ListenerEventDisconnected, err)
time.Sleep(time.Until(nextReconnect))
}
}
func (l *Listener) listenerMain() {
l.listenerConnLoop()
close(l.Notify)
}

6
vendor/github.com/lib/pq/oid/doc.go generated vendored Normal file
View file

@ -0,0 +1,6 @@
// Package oid contains OID constants
// as defined by the Postgres server.
package oid
// Oid is a Postgres Object ID.
type Oid uint32

93
vendor/github.com/lib/pq/oid/gen.go generated vendored Normal file
View file

@ -0,0 +1,93 @@
// +build ignore
// Generate the table of OID values
// Run with 'go run gen.go'.
package main
import (
"database/sql"
"fmt"
"log"
"os"
"os/exec"
"strings"
_ "github.com/lib/pq"
)
// OID represent a postgres Object Identifier Type.
type OID struct {
ID int
Type string
}
// Name returns an upper case version of the oid type.
func (o OID) Name() string {
return strings.ToUpper(o.Type)
}
func main() {
datname := os.Getenv("PGDATABASE")
sslmode := os.Getenv("PGSSLMODE")
if datname == "" {
os.Setenv("PGDATABASE", "pqgotest")
}
if sslmode == "" {
os.Setenv("PGSSLMODE", "disable")
}
db, err := sql.Open("postgres", "")
if err != nil {
log.Fatal(err)
}
rows, err := db.Query(`
SELECT typname, oid
FROM pg_type WHERE oid < 10000
ORDER BY oid;
`)
if err != nil {
log.Fatal(err)
}
oids := make([]*OID, 0)
for rows.Next() {
var oid OID
if err = rows.Scan(&oid.Type, &oid.ID); err != nil {
log.Fatal(err)
}
oids = append(oids, &oid)
}
if err = rows.Err(); err != nil {
log.Fatal(err)
}
cmd := exec.Command("gofmt")
cmd.Stderr = os.Stderr
w, err := cmd.StdinPipe()
if err != nil {
log.Fatal(err)
}
f, err := os.Create("types.go")
if err != nil {
log.Fatal(err)
}
cmd.Stdout = f
err = cmd.Start()
if err != nil {
log.Fatal(err)
}
fmt.Fprintln(w, "// Code generated by gen.go. DO NOT EDIT.")
fmt.Fprintln(w, "\npackage oid")
fmt.Fprintln(w, "const (")
for _, oid := range oids {
fmt.Fprintf(w, "T_%s Oid = %d\n", oid.Type, oid.ID)
}
fmt.Fprintln(w, ")")
fmt.Fprintln(w, "var TypeName = map[Oid]string{")
for _, oid := range oids {
fmt.Fprintf(w, "T_%s: \"%s\",\n", oid.Type, oid.Name())
}
fmt.Fprintln(w, "}")
w.Close()
cmd.Wait()
}

343
vendor/github.com/lib/pq/oid/types.go generated vendored Normal file
View file

@ -0,0 +1,343 @@
// Code generated by gen.go. DO NOT EDIT.
package oid
const (
T_bool Oid = 16
T_bytea Oid = 17
T_char Oid = 18
T_name Oid = 19
T_int8 Oid = 20
T_int2 Oid = 21
T_int2vector Oid = 22
T_int4 Oid = 23
T_regproc Oid = 24
T_text Oid = 25
T_oid Oid = 26
T_tid Oid = 27
T_xid Oid = 28
T_cid Oid = 29
T_oidvector Oid = 30
T_pg_ddl_command Oid = 32
T_pg_type Oid = 71
T_pg_attribute Oid = 75
T_pg_proc Oid = 81
T_pg_class Oid = 83
T_json Oid = 114
T_xml Oid = 142
T__xml Oid = 143
T_pg_node_tree Oid = 194
T__json Oid = 199
T_smgr Oid = 210
T_index_am_handler Oid = 325
T_point Oid = 600
T_lseg Oid = 601
T_path Oid = 602
T_box Oid = 603
T_polygon Oid = 604
T_line Oid = 628
T__line Oid = 629
T_cidr Oid = 650
T__cidr Oid = 651
T_float4 Oid = 700
T_float8 Oid = 701
T_abstime Oid = 702
T_reltime Oid = 703
T_tinterval Oid = 704
T_unknown Oid = 705
T_circle Oid = 718
T__circle Oid = 719
T_money Oid = 790
T__money Oid = 791
T_macaddr Oid = 829
T_inet Oid = 869
T__bool Oid = 1000
T__bytea Oid = 1001
T__char Oid = 1002
T__name Oid = 1003
T__int2 Oid = 1005
T__int2vector Oid = 1006
T__int4 Oid = 1007
T__regproc Oid = 1008
T__text Oid = 1009
T__tid Oid = 1010
T__xid Oid = 1011
T__cid Oid = 1012
T__oidvector Oid = 1013
T__bpchar Oid = 1014
T__varchar Oid = 1015
T__int8 Oid = 1016
T__point Oid = 1017
T__lseg Oid = 1018
T__path Oid = 1019
T__box Oid = 1020
T__float4 Oid = 1021
T__float8 Oid = 1022
T__abstime Oid = 1023
T__reltime Oid = 1024
T__tinterval Oid = 1025
T__polygon Oid = 1027
T__oid Oid = 1028
T_aclitem Oid = 1033
T__aclitem Oid = 1034
T__macaddr Oid = 1040
T__inet Oid = 1041
T_bpchar Oid = 1042
T_varchar Oid = 1043
T_date Oid = 1082
T_time Oid = 1083
T_timestamp Oid = 1114
T__timestamp Oid = 1115
T__date Oid = 1182
T__time Oid = 1183
T_timestamptz Oid = 1184
T__timestamptz Oid = 1185
T_interval Oid = 1186
T__interval Oid = 1187
T__numeric Oid = 1231
T_pg_database Oid = 1248
T__cstring Oid = 1263
T_timetz Oid = 1266
T__timetz Oid = 1270
T_bit Oid = 1560
T__bit Oid = 1561
T_varbit Oid = 1562
T__varbit Oid = 1563
T_numeric Oid = 1700
T_refcursor Oid = 1790
T__refcursor Oid = 2201
T_regprocedure Oid = 2202
T_regoper Oid = 2203
T_regoperator Oid = 2204
T_regclass Oid = 2205
T_regtype Oid = 2206
T__regprocedure Oid = 2207
T__regoper Oid = 2208
T__regoperator Oid = 2209
T__regclass Oid = 2210
T__regtype Oid = 2211
T_record Oid = 2249
T_cstring Oid = 2275
T_any Oid = 2276
T_anyarray Oid = 2277
T_void Oid = 2278
T_trigger Oid = 2279
T_language_handler Oid = 2280
T_internal Oid = 2281
T_opaque Oid = 2282
T_anyelement Oid = 2283
T__record Oid = 2287
T_anynonarray Oid = 2776
T_pg_authid Oid = 2842
T_pg_auth_members Oid = 2843
T__txid_snapshot Oid = 2949
T_uuid Oid = 2950
T__uuid Oid = 2951
T_txid_snapshot Oid = 2970
T_fdw_handler Oid = 3115
T_pg_lsn Oid = 3220
T__pg_lsn Oid = 3221
T_tsm_handler Oid = 3310
T_anyenum Oid = 3500
T_tsvector Oid = 3614
T_tsquery Oid = 3615
T_gtsvector Oid = 3642
T__tsvector Oid = 3643
T__gtsvector Oid = 3644
T__tsquery Oid = 3645
T_regconfig Oid = 3734
T__regconfig Oid = 3735
T_regdictionary Oid = 3769
T__regdictionary Oid = 3770
T_jsonb Oid = 3802
T__jsonb Oid = 3807
T_anyrange Oid = 3831
T_event_trigger Oid = 3838
T_int4range Oid = 3904
T__int4range Oid = 3905
T_numrange Oid = 3906
T__numrange Oid = 3907
T_tsrange Oid = 3908
T__tsrange Oid = 3909
T_tstzrange Oid = 3910
T__tstzrange Oid = 3911
T_daterange Oid = 3912
T__daterange Oid = 3913
T_int8range Oid = 3926
T__int8range Oid = 3927
T_pg_shseclabel Oid = 4066
T_regnamespace Oid = 4089
T__regnamespace Oid = 4090
T_regrole Oid = 4096
T__regrole Oid = 4097
)
var TypeName = map[Oid]string{
T_bool: "BOOL",
T_bytea: "BYTEA",
T_char: "CHAR",
T_name: "NAME",
T_int8: "INT8",
T_int2: "INT2",
T_int2vector: "INT2VECTOR",
T_int4: "INT4",
T_regproc: "REGPROC",
T_text: "TEXT",
T_oid: "OID",
T_tid: "TID",
T_xid: "XID",
T_cid: "CID",
T_oidvector: "OIDVECTOR",
T_pg_ddl_command: "PG_DDL_COMMAND",
T_pg_type: "PG_TYPE",
T_pg_attribute: "PG_ATTRIBUTE",
T_pg_proc: "PG_PROC",
T_pg_class: "PG_CLASS",
T_json: "JSON",
T_xml: "XML",
T__xml: "_XML",
T_pg_node_tree: "PG_NODE_TREE",
T__json: "_JSON",
T_smgr: "SMGR",
T_index_am_handler: "INDEX_AM_HANDLER",
T_point: "POINT",
T_lseg: "LSEG",
T_path: "PATH",
T_box: "BOX",
T_polygon: "POLYGON",
T_line: "LINE",
T__line: "_LINE",
T_cidr: "CIDR",
T__cidr: "_CIDR",
T_float4: "FLOAT4",
T_float8: "FLOAT8",
T_abstime: "ABSTIME",
T_reltime: "RELTIME",
T_tinterval: "TINTERVAL",
T_unknown: "UNKNOWN",
T_circle: "CIRCLE",
T__circle: "_CIRCLE",
T_money: "MONEY",
T__money: "_MONEY",
T_macaddr: "MACADDR",
T_inet: "INET",
T__bool: "_BOOL",
T__bytea: "_BYTEA",
T__char: "_CHAR",
T__name: "_NAME",
T__int2: "_INT2",
T__int2vector: "_INT2VECTOR",
T__int4: "_INT4",
T__regproc: "_REGPROC",
T__text: "_TEXT",
T__tid: "_TID",
T__xid: "_XID",
T__cid: "_CID",
T__oidvector: "_OIDVECTOR",
T__bpchar: "_BPCHAR",
T__varchar: "_VARCHAR",
T__int8: "_INT8",
T__point: "_POINT",
T__lseg: "_LSEG",
T__path: "_PATH",
T__box: "_BOX",
T__float4: "_FLOAT4",
T__float8: "_FLOAT8",
T__abstime: "_ABSTIME",
T__reltime: "_RELTIME",
T__tinterval: "_TINTERVAL",
T__polygon: "_POLYGON",
T__oid: "_OID",
T_aclitem: "ACLITEM",
T__aclitem: "_ACLITEM",
T__macaddr: "_MACADDR",
T__inet: "_INET",
T_bpchar: "BPCHAR",
T_varchar: "VARCHAR",
T_date: "DATE",
T_time: "TIME",
T_timestamp: "TIMESTAMP",
T__timestamp: "_TIMESTAMP",
T__date: "_DATE",
T__time: "_TIME",
T_timestamptz: "TIMESTAMPTZ",
T__timestamptz: "_TIMESTAMPTZ",
T_interval: "INTERVAL",
T__interval: "_INTERVAL",
T__numeric: "_NUMERIC",
T_pg_database: "PG_DATABASE",
T__cstring: "_CSTRING",
T_timetz: "TIMETZ",
T__timetz: "_TIMETZ",
T_bit: "BIT",
T__bit: "_BIT",
T_varbit: "VARBIT",
T__varbit: "_VARBIT",
T_numeric: "NUMERIC",
T_refcursor: "REFCURSOR",
T__refcursor: "_REFCURSOR",
T_regprocedure: "REGPROCEDURE",
T_regoper: "REGOPER",
T_regoperator: "REGOPERATOR",
T_regclass: "REGCLASS",
T_regtype: "REGTYPE",
T__regprocedure: "_REGPROCEDURE",
T__regoper: "_REGOPER",
T__regoperator: "_REGOPERATOR",
T__regclass: "_REGCLASS",
T__regtype: "_REGTYPE",
T_record: "RECORD",
T_cstring: "CSTRING",
T_any: "ANY",
T_anyarray: "ANYARRAY",
T_void: "VOID",
T_trigger: "TRIGGER",
T_language_handler: "LANGUAGE_HANDLER",
T_internal: "INTERNAL",
T_opaque: "OPAQUE",
T_anyelement: "ANYELEMENT",
T__record: "_RECORD",
T_anynonarray: "ANYNONARRAY",
T_pg_authid: "PG_AUTHID",
T_pg_auth_members: "PG_AUTH_MEMBERS",
T__txid_snapshot: "_TXID_SNAPSHOT",
T_uuid: "UUID",
T__uuid: "_UUID",
T_txid_snapshot: "TXID_SNAPSHOT",
T_fdw_handler: "FDW_HANDLER",
T_pg_lsn: "PG_LSN",
T__pg_lsn: "_PG_LSN",
T_tsm_handler: "TSM_HANDLER",
T_anyenum: "ANYENUM",
T_tsvector: "TSVECTOR",
T_tsquery: "TSQUERY",
T_gtsvector: "GTSVECTOR",
T__tsvector: "_TSVECTOR",
T__gtsvector: "_GTSVECTOR",
T__tsquery: "_TSQUERY",
T_regconfig: "REGCONFIG",
T__regconfig: "_REGCONFIG",
T_regdictionary: "REGDICTIONARY",
T__regdictionary: "_REGDICTIONARY",
T_jsonb: "JSONB",
T__jsonb: "_JSONB",
T_anyrange: "ANYRANGE",
T_event_trigger: "EVENT_TRIGGER",
T_int4range: "INT4RANGE",
T__int4range: "_INT4RANGE",
T_numrange: "NUMRANGE",
T__numrange: "_NUMRANGE",
T_tsrange: "TSRANGE",
T__tsrange: "_TSRANGE",
T_tstzrange: "TSTZRANGE",
T__tstzrange: "_TSTZRANGE",
T_daterange: "DATERANGE",
T__daterange: "_DATERANGE",
T_int8range: "INT8RANGE",
T__int8range: "_INT8RANGE",
T_pg_shseclabel: "PG_SHSECLABEL",
T_regnamespace: "REGNAMESPACE",
T__regnamespace: "_REGNAMESPACE",
T_regrole: "REGROLE",
T__regrole: "_REGROLE",
}

93
vendor/github.com/lib/pq/rows.go generated vendored Normal file
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package pq
import (
"math"
"reflect"
"time"
"github.com/lib/pq/oid"
)
const headerSize = 4
type fieldDesc struct {
// The object ID of the data type.
OID oid.Oid
// The data type size (see pg_type.typlen).
// Note that negative values denote variable-width types.
Len int
// The type modifier (see pg_attribute.atttypmod).
// The meaning of the modifier is type-specific.
Mod int
}
func (fd fieldDesc) Type() reflect.Type {
switch fd.OID {
case oid.T_int8:
return reflect.TypeOf(int64(0))
case oid.T_int4:
return reflect.TypeOf(int32(0))
case oid.T_int2:
return reflect.TypeOf(int16(0))
case oid.T_varchar, oid.T_text:
return reflect.TypeOf("")
case oid.T_bool:
return reflect.TypeOf(false)
case oid.T_date, oid.T_time, oid.T_timetz, oid.T_timestamp, oid.T_timestamptz:
return reflect.TypeOf(time.Time{})
case oid.T_bytea:
return reflect.TypeOf([]byte(nil))
default:
return reflect.TypeOf(new(interface{})).Elem()
}
}
func (fd fieldDesc) Name() string {
return oid.TypeName[fd.OID]
}
func (fd fieldDesc) Length() (length int64, ok bool) {
switch fd.OID {
case oid.T_text, oid.T_bytea:
return math.MaxInt64, true
case oid.T_varchar, oid.T_bpchar:
return int64(fd.Mod - headerSize), true
default:
return 0, false
}
}
func (fd fieldDesc) PrecisionScale() (precision, scale int64, ok bool) {
switch fd.OID {
case oid.T_numeric, oid.T__numeric:
mod := fd.Mod - headerSize
precision = int64((mod >> 16) & 0xffff)
scale = int64(mod & 0xffff)
return precision, scale, true
default:
return 0, 0, false
}
}
// ColumnTypeScanType returns the value type that can be used to scan types into.
func (rs *rows) ColumnTypeScanType(index int) reflect.Type {
return rs.colTyps[index].Type()
}
// ColumnTypeDatabaseTypeName return the database system type name.
func (rs *rows) ColumnTypeDatabaseTypeName(index int) string {
return rs.colTyps[index].Name()
}
// ColumnTypeLength returns the length of the column type if the column is a
// variable length type. If the column is not a variable length type ok
// should return false.
func (rs *rows) ColumnTypeLength(index int) (length int64, ok bool) {
return rs.colTyps[index].Length()
}
// ColumnTypePrecisionScale should return the precision and scale for decimal
// types. If not applicable, ok should be false.
func (rs *rows) ColumnTypePrecisionScale(index int) (precision, scale int64, ok bool) {
return rs.colTyps[index].PrecisionScale()
}

264
vendor/github.com/lib/pq/scram/scram.go generated vendored Normal file
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// Copyright (c) 2014 - Gustavo Niemeyer <gustavo@niemeyer.net>
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Pacakage scram implements a SCRAM-{SHA-1,etc} client per RFC5802.
//
// http://tools.ietf.org/html/rfc5802
//
package scram
import (
"bytes"
"crypto/hmac"
"crypto/rand"
"encoding/base64"
"fmt"
"hash"
"strconv"
"strings"
)
// Client implements a SCRAM-* client (SCRAM-SHA-1, SCRAM-SHA-256, etc).
//
// A Client may be used within a SASL conversation with logic resembling:
//
// var in []byte
// var client = scram.NewClient(sha1.New, user, pass)
// for client.Step(in) {
// out := client.Out()
// // send out to server
// in := serverOut
// }
// if client.Err() != nil {
// // auth failed
// }
//
type Client struct {
newHash func() hash.Hash
user string
pass string
step int
out bytes.Buffer
err error
clientNonce []byte
serverNonce []byte
saltedPass []byte
authMsg bytes.Buffer
}
// NewClient returns a new SCRAM-* client with the provided hash algorithm.
//
// For SCRAM-SHA-256, for example, use:
//
// client := scram.NewClient(sha256.New, user, pass)
//
func NewClient(newHash func() hash.Hash, user, pass string) *Client {
c := &Client{
newHash: newHash,
user: user,
pass: pass,
}
c.out.Grow(256)
c.authMsg.Grow(256)
return c
}
// Out returns the data to be sent to the server in the current step.
func (c *Client) Out() []byte {
if c.out.Len() == 0 {
return nil
}
return c.out.Bytes()
}
// Err returns the error that ocurred, or nil if there were no errors.
func (c *Client) Err() error {
return c.err
}
// SetNonce sets the client nonce to the provided value.
// If not set, the nonce is generated automatically out of crypto/rand on the first step.
func (c *Client) SetNonce(nonce []byte) {
c.clientNonce = nonce
}
var escaper = strings.NewReplacer("=", "=3D", ",", "=2C")
// Step processes the incoming data from the server and makes the
// next round of data for the server available via Client.Out.
// Step returns false if there are no errors and more data is
// still expected.
func (c *Client) Step(in []byte) bool {
c.out.Reset()
if c.step > 2 || c.err != nil {
return false
}
c.step++
switch c.step {
case 1:
c.err = c.step1(in)
case 2:
c.err = c.step2(in)
case 3:
c.err = c.step3(in)
}
return c.step > 2 || c.err != nil
}
func (c *Client) step1(in []byte) error {
if len(c.clientNonce) == 0 {
const nonceLen = 16
buf := make([]byte, nonceLen+b64.EncodedLen(nonceLen))
if _, err := rand.Read(buf[:nonceLen]); err != nil {
return fmt.Errorf("cannot read random SCRAM-SHA-256 nonce from operating system: %v", err)
}
c.clientNonce = buf[nonceLen:]
b64.Encode(c.clientNonce, buf[:nonceLen])
}
c.authMsg.WriteString("n=")
escaper.WriteString(&c.authMsg, c.user)
c.authMsg.WriteString(",r=")
c.authMsg.Write(c.clientNonce)
c.out.WriteString("n,,")
c.out.Write(c.authMsg.Bytes())
return nil
}
var b64 = base64.StdEncoding
func (c *Client) step2(in []byte) error {
c.authMsg.WriteByte(',')
c.authMsg.Write(in)
fields := bytes.Split(in, []byte(","))
if len(fields) != 3 {
return fmt.Errorf("expected 3 fields in first SCRAM-SHA-256 server message, got %d: %q", len(fields), in)
}
if !bytes.HasPrefix(fields[0], []byte("r=")) || len(fields[0]) < 2 {
return fmt.Errorf("server sent an invalid SCRAM-SHA-256 nonce: %q", fields[0])
}
if !bytes.HasPrefix(fields[1], []byte("s=")) || len(fields[1]) < 6 {
return fmt.Errorf("server sent an invalid SCRAM-SHA-256 salt: %q", fields[1])
}
if !bytes.HasPrefix(fields[2], []byte("i=")) || len(fields[2]) < 6 {
return fmt.Errorf("server sent an invalid SCRAM-SHA-256 iteration count: %q", fields[2])
}
c.serverNonce = fields[0][2:]
if !bytes.HasPrefix(c.serverNonce, c.clientNonce) {
return fmt.Errorf("server SCRAM-SHA-256 nonce is not prefixed by client nonce: got %q, want %q+\"...\"", c.serverNonce, c.clientNonce)
}
salt := make([]byte, b64.DecodedLen(len(fields[1][2:])))
n, err := b64.Decode(salt, fields[1][2:])
if err != nil {
return fmt.Errorf("cannot decode SCRAM-SHA-256 salt sent by server: %q", fields[1])
}
salt = salt[:n]
iterCount, err := strconv.Atoi(string(fields[2][2:]))
if err != nil {
return fmt.Errorf("server sent an invalid SCRAM-SHA-256 iteration count: %q", fields[2])
}
c.saltPassword(salt, iterCount)
c.authMsg.WriteString(",c=biws,r=")
c.authMsg.Write(c.serverNonce)
c.out.WriteString("c=biws,r=")
c.out.Write(c.serverNonce)
c.out.WriteString(",p=")
c.out.Write(c.clientProof())
return nil
}
func (c *Client) step3(in []byte) error {
var isv, ise bool
var fields = bytes.Split(in, []byte(","))
if len(fields) == 1 {
isv = bytes.HasPrefix(fields[0], []byte("v="))
ise = bytes.HasPrefix(fields[0], []byte("e="))
}
if ise {
return fmt.Errorf("SCRAM-SHA-256 authentication error: %s", fields[0][2:])
} else if !isv {
return fmt.Errorf("unsupported SCRAM-SHA-256 final message from server: %q", in)
}
if !bytes.Equal(c.serverSignature(), fields[0][2:]) {
return fmt.Errorf("cannot authenticate SCRAM-SHA-256 server signature: %q", fields[0][2:])
}
return nil
}
func (c *Client) saltPassword(salt []byte, iterCount int) {
mac := hmac.New(c.newHash, []byte(c.pass))
mac.Write(salt)
mac.Write([]byte{0, 0, 0, 1})
ui := mac.Sum(nil)
hi := make([]byte, len(ui))
copy(hi, ui)
for i := 1; i < iterCount; i++ {
mac.Reset()
mac.Write(ui)
mac.Sum(ui[:0])
for j, b := range ui {
hi[j] ^= b
}
}
c.saltedPass = hi
}
func (c *Client) clientProof() []byte {
mac := hmac.New(c.newHash, c.saltedPass)
mac.Write([]byte("Client Key"))
clientKey := mac.Sum(nil)
hash := c.newHash()
hash.Write(clientKey)
storedKey := hash.Sum(nil)
mac = hmac.New(c.newHash, storedKey)
mac.Write(c.authMsg.Bytes())
clientProof := mac.Sum(nil)
for i, b := range clientKey {
clientProof[i] ^= b
}
clientProof64 := make([]byte, b64.EncodedLen(len(clientProof)))
b64.Encode(clientProof64, clientProof)
return clientProof64
}
func (c *Client) serverSignature() []byte {
mac := hmac.New(c.newHash, c.saltedPass)
mac.Write([]byte("Server Key"))
serverKey := mac.Sum(nil)
mac = hmac.New(c.newHash, serverKey)
mac.Write(c.authMsg.Bytes())
serverSignature := mac.Sum(nil)
encoded := make([]byte, b64.EncodedLen(len(serverSignature)))
b64.Encode(encoded, serverSignature)
return encoded
}

175
vendor/github.com/lib/pq/ssl.go generated vendored Normal file
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package pq
import (
"crypto/tls"
"crypto/x509"
"io/ioutil"
"net"
"os"
"os/user"
"path/filepath"
)
// ssl generates a function to upgrade a net.Conn based on the "sslmode" and
// related settings. The function is nil when no upgrade should take place.
func ssl(o values) (func(net.Conn) (net.Conn, error), error) {
verifyCaOnly := false
tlsConf := tls.Config{}
switch mode := o["sslmode"]; mode {
// "require" is the default.
case "", "require":
// We must skip TLS's own verification since it requires full
// verification since Go 1.3.
tlsConf.InsecureSkipVerify = true
// From http://www.postgresql.org/docs/current/static/libpq-ssl.html:
//
// Note: For backwards compatibility with earlier versions of
// PostgreSQL, if a root CA file exists, the behavior of
// sslmode=require will be the same as that of verify-ca, meaning the
// server certificate is validated against the CA. Relying on this
// behavior is discouraged, and applications that need certificate
// validation should always use verify-ca or verify-full.
if sslrootcert, ok := o["sslrootcert"]; ok {
if _, err := os.Stat(sslrootcert); err == nil {
verifyCaOnly = true
} else {
delete(o, "sslrootcert")
}
}
case "verify-ca":
// We must skip TLS's own verification since it requires full
// verification since Go 1.3.
tlsConf.InsecureSkipVerify = true
verifyCaOnly = true
case "verify-full":
tlsConf.ServerName = o["host"]
case "disable":
return nil, nil
default:
return nil, fmterrorf(`unsupported sslmode %q; only "require" (default), "verify-full", "verify-ca", and "disable" supported`, mode)
}
err := sslClientCertificates(&tlsConf, o)
if err != nil {
return nil, err
}
err = sslCertificateAuthority(&tlsConf, o)
if err != nil {
return nil, err
}
// Accept renegotiation requests initiated by the backend.
//
// Renegotiation was deprecated then removed from PostgreSQL 9.5, but
// the default configuration of older versions has it enabled. Redshift
// also initiates renegotiations and cannot be reconfigured.
tlsConf.Renegotiation = tls.RenegotiateFreelyAsClient
return func(conn net.Conn) (net.Conn, error) {
client := tls.Client(conn, &tlsConf)
if verifyCaOnly {
err := sslVerifyCertificateAuthority(client, &tlsConf)
if err != nil {
return nil, err
}
}
return client, nil
}, nil
}
// sslClientCertificates adds the certificate specified in the "sslcert" and
// "sslkey" settings, or if they aren't set, from the .postgresql directory
// in the user's home directory. The configured files must exist and have
// the correct permissions.
func sslClientCertificates(tlsConf *tls.Config, o values) error {
// user.Current() might fail when cross-compiling. We have to ignore the
// error and continue without home directory defaults, since we wouldn't
// know from where to load them.
user, _ := user.Current()
// In libpq, the client certificate is only loaded if the setting is not blank.
//
// https://github.com/postgres/postgres/blob/REL9_6_2/src/interfaces/libpq/fe-secure-openssl.c#L1036-L1037
sslcert := o["sslcert"]
if len(sslcert) == 0 && user != nil {
sslcert = filepath.Join(user.HomeDir, ".postgresql", "postgresql.crt")
}
// https://github.com/postgres/postgres/blob/REL9_6_2/src/interfaces/libpq/fe-secure-openssl.c#L1045
if len(sslcert) == 0 {
return nil
}
// https://github.com/postgres/postgres/blob/REL9_6_2/src/interfaces/libpq/fe-secure-openssl.c#L1050:L1054
if _, err := os.Stat(sslcert); os.IsNotExist(err) {
return nil
} else if err != nil {
return err
}
// In libpq, the ssl key is only loaded if the setting is not blank.
//
// https://github.com/postgres/postgres/blob/REL9_6_2/src/interfaces/libpq/fe-secure-openssl.c#L1123-L1222
sslkey := o["sslkey"]
if len(sslkey) == 0 && user != nil {
sslkey = filepath.Join(user.HomeDir, ".postgresql", "postgresql.key")
}
if len(sslkey) > 0 {
if err := sslKeyPermissions(sslkey); err != nil {
return err
}
}
cert, err := tls.LoadX509KeyPair(sslcert, sslkey)
if err != nil {
return err
}
tlsConf.Certificates = []tls.Certificate{cert}
return nil
}
// sslCertificateAuthority adds the RootCA specified in the "sslrootcert" setting.
func sslCertificateAuthority(tlsConf *tls.Config, o values) error {
// In libpq, the root certificate is only loaded if the setting is not blank.
//
// https://github.com/postgres/postgres/blob/REL9_6_2/src/interfaces/libpq/fe-secure-openssl.c#L950-L951
if sslrootcert := o["sslrootcert"]; len(sslrootcert) > 0 {
tlsConf.RootCAs = x509.NewCertPool()
cert, err := ioutil.ReadFile(sslrootcert)
if err != nil {
return err
}
if !tlsConf.RootCAs.AppendCertsFromPEM(cert) {
return fmterrorf("couldn't parse pem in sslrootcert")
}
}
return nil
}
// sslVerifyCertificateAuthority carries out a TLS handshake to the server and
// verifies the presented certificate against the CA, i.e. the one specified in
// sslrootcert or the system CA if sslrootcert was not specified.
func sslVerifyCertificateAuthority(client *tls.Conn, tlsConf *tls.Config) error {
err := client.Handshake()
if err != nil {
return err
}
certs := client.ConnectionState().PeerCertificates
opts := x509.VerifyOptions{
DNSName: client.ConnectionState().ServerName,
Intermediates: x509.NewCertPool(),
Roots: tlsConf.RootCAs,
}
for i, cert := range certs {
if i == 0 {
continue
}
opts.Intermediates.AddCert(cert)
}
_, err = certs[0].Verify(opts)
return err
}

20
vendor/github.com/lib/pq/ssl_permissions.go generated vendored Normal file
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// +build !windows
package pq
import "os"
// sslKeyPermissions checks the permissions on user-supplied ssl key files.
// The key file should have very little access.
//
// libpq does not check key file permissions on Windows.
func sslKeyPermissions(sslkey string) error {
info, err := os.Stat(sslkey)
if err != nil {
return err
}
if info.Mode().Perm()&0077 != 0 {
return ErrSSLKeyHasWorldPermissions
}
return nil
}

9
vendor/github.com/lib/pq/ssl_windows.go generated vendored Normal file
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@ -0,0 +1,9 @@
// +build windows
package pq
// sslKeyPermissions checks the permissions on user-supplied ssl key files.
// The key file should have very little access.
//
// libpq does not check key file permissions on Windows.
func sslKeyPermissions(string) error { return nil }

76
vendor/github.com/lib/pq/url.go generated vendored Normal file
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package pq
import (
"fmt"
"net"
nurl "net/url"
"sort"
"strings"
)
// ParseURL no longer needs to be used by clients of this library since supplying a URL as a
// connection string to sql.Open() is now supported:
//
// sql.Open("postgres", "postgres://bob:secret@1.2.3.4:5432/mydb?sslmode=verify-full")
//
// It remains exported here for backwards-compatibility.
//
// ParseURL converts a url to a connection string for driver.Open.
// Example:
//
// "postgres://bob:secret@1.2.3.4:5432/mydb?sslmode=verify-full"
//
// converts to:
//
// "user=bob password=secret host=1.2.3.4 port=5432 dbname=mydb sslmode=verify-full"
//
// A minimal example:
//
// "postgres://"
//
// This will be blank, causing driver.Open to use all of the defaults
func ParseURL(url string) (string, error) {
u, err := nurl.Parse(url)
if err != nil {
return "", err
}
if u.Scheme != "postgres" && u.Scheme != "postgresql" {
return "", fmt.Errorf("invalid connection protocol: %s", u.Scheme)
}
var kvs []string
escaper := strings.NewReplacer(` `, `\ `, `'`, `\'`, `\`, `\\`)
accrue := func(k, v string) {
if v != "" {
kvs = append(kvs, k+"="+escaper.Replace(v))
}
}
if u.User != nil {
v := u.User.Username()
accrue("user", v)
v, _ = u.User.Password()
accrue("password", v)
}
if host, port, err := net.SplitHostPort(u.Host); err != nil {
accrue("host", u.Host)
} else {
accrue("host", host)
accrue("port", port)
}
if u.Path != "" {
accrue("dbname", u.Path[1:])
}
q := u.Query()
for k := range q {
accrue(k, q.Get(k))
}
sort.Strings(kvs) // Makes testing easier (not a performance concern)
return strings.Join(kvs, " "), nil
}

24
vendor/github.com/lib/pq/user_posix.go generated vendored Normal file
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// Package pq is a pure Go Postgres driver for the database/sql package.
// +build darwin dragonfly freebsd linux nacl netbsd openbsd solaris rumprun
package pq
import (
"os"
"os/user"
)
func userCurrent() (string, error) {
u, err := user.Current()
if err == nil {
return u.Username, nil
}
name := os.Getenv("USER")
if name != "" {
return name, nil
}
return "", ErrCouldNotDetectUsername
}

27
vendor/github.com/lib/pq/user_windows.go generated vendored Normal file
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// Package pq is a pure Go Postgres driver for the database/sql package.
package pq
import (
"path/filepath"
"syscall"
)
// Perform Windows user name lookup identically to libpq.
//
// The PostgreSQL code makes use of the legacy Win32 function
// GetUserName, and that function has not been imported into stock Go.
// GetUserNameEx is available though, the difference being that a
// wider range of names are available. To get the output to be the
// same as GetUserName, only the base (or last) component of the
// result is returned.
func userCurrent() (string, error) {
pw_name := make([]uint16, 128)
pwname_size := uint32(len(pw_name)) - 1
err := syscall.GetUserNameEx(syscall.NameSamCompatible, &pw_name[0], &pwname_size)
if err != nil {
return "", ErrCouldNotDetectUsername
}
s := syscall.UTF16ToString(pw_name)
u := filepath.Base(s)
return u, nil
}

23
vendor/github.com/lib/pq/uuid.go generated vendored Normal file
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package pq
import (
"encoding/hex"
"fmt"
)
// decodeUUIDBinary interprets the binary format of a uuid, returning it in text format.
func decodeUUIDBinary(src []byte) ([]byte, error) {
if len(src) != 16 {
return nil, fmt.Errorf("pq: unable to decode uuid; bad length: %d", len(src))
}
dst := make([]byte, 36)
dst[8], dst[13], dst[18], dst[23] = '-', '-', '-', '-'
hex.Encode(dst[0:], src[0:4])
hex.Encode(dst[9:], src[4:6])
hex.Encode(dst[14:], src[6:8])
hex.Encode(dst[19:], src[8:10])
hex.Encode(dst[24:], src[10:16])
return dst, nil
}

339
vendor/github.com/status-im/migrate/database/postgres/postgres.go generated vendored Normal file
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// +build go1.9
package postgres
import (
"context"
"database/sql"
"fmt"
"io"
"io/ioutil"
nurl "net/url"
"strconv"
"strings"
"github.com/golang-migrate/migrate"
"github.com/golang-migrate/migrate/database"
"github.com/lib/pq"
)
func init() {
db := Postgres{}
database.Register("postgres", &db)
database.Register("postgresql", &db)
}
var DefaultMigrationsTable = "schema_migrations"
var (
ErrNilConfig = fmt.Errorf("no config")
ErrNoDatabaseName = fmt.Errorf("no database name")
ErrNoSchema = fmt.Errorf("no schema")
ErrDatabaseDirty = fmt.Errorf("database is dirty")
)
type Config struct {
MigrationsTable string
DatabaseName string
}
type Postgres struct {
// Locking and unlocking need to use the same connection
conn *sql.Conn
db *sql.DB
isLocked bool
// Open and WithInstance need to garantuee that config is never nil
config *Config
}
func WithInstance(instance *sql.DB, config *Config) (database.Driver, error) {
if config == nil {
return nil, ErrNilConfig
}
if err := instance.Ping(); err != nil {
return nil, err
}
query := `SELECT CURRENT_DATABASE()`
var databaseName string
if err := instance.QueryRow(query).Scan(&databaseName); err != nil {
return nil, &database.Error{OrigErr: err, Query: []byte(query)}
}
if len(databaseName) == 0 {
return nil, ErrNoDatabaseName
}
config.DatabaseName = databaseName
if len(config.MigrationsTable) == 0 {
config.MigrationsTable = DefaultMigrationsTable
}
conn, err := instance.Conn(context.Background())
if err != nil {
return nil, err
}
px := &Postgres{
conn: conn,
db: instance,
config: config,
}
if err := px.ensureVersionTable(); err != nil {
return nil, err
}
return px, nil
}
func (p *Postgres) Open(url string) (database.Driver, error) {
purl, err := nurl.Parse(url)
if err != nil {
return nil, err
}
db, err := sql.Open("postgres", migrate.FilterCustomQuery(purl).String())
if err != nil {
return nil, err
}
migrationsTable := purl.Query().Get("x-migrations-table")
if len(migrationsTable) == 0 {
migrationsTable = DefaultMigrationsTable
}
px, err := WithInstance(db, &Config{
DatabaseName: purl.Path,
MigrationsTable: migrationsTable,
})
if err != nil {
return nil, err
}
return px, nil
}
func (p *Postgres) Close() error {
connErr := p.conn.Close()
dbErr := p.db.Close()
if connErr != nil || dbErr != nil {
return fmt.Errorf("conn: %v, db: %v", connErr, dbErr)
}
return nil
}
// https://www.postgresql.org/docs/9.6/static/explicit-locking.html#ADVISORY-LOCKS
func (p *Postgres) Lock() error {
if p.isLocked {
return database.ErrLocked
}
aid, err := database.GenerateAdvisoryLockId(p.config.DatabaseName)
if err != nil {
return err
}
// This will either obtain the lock immediately and return true,
// or return false if the lock cannot be acquired immediately.
query := `SELECT pg_advisory_lock($1)`
if _, err := p.conn.ExecContext(context.Background(), query, aid); err != nil {
return &database.Error{OrigErr: err, Err: "try lock failed", Query: []byte(query)}
}
p.isLocked = true
return nil
}
func (p *Postgres) Unlock() error {
if !p.isLocked {
return nil
}
aid, err := database.GenerateAdvisoryLockId(p.config.DatabaseName)
if err != nil {
return err
}
query := `SELECT pg_advisory_unlock($1)`
if _, err := p.conn.ExecContext(context.Background(), query, aid); err != nil {
return &database.Error{OrigErr: err, Query: []byte(query)}
}
p.isLocked = false
return nil
}
func (p *Postgres) Run(migration io.Reader) error {
migr, err := ioutil.ReadAll(migration)
if err != nil {
return err
}
// run migration
query := string(migr[:])
if _, err := p.conn.ExecContext(context.Background(), query); err != nil {
if pgErr, ok := err.(*pq.Error); ok {
var line uint
var col uint
var lineColOK bool
if pgErr.Position != "" {
if pos, err := strconv.ParseUint(pgErr.Position, 10, 64); err == nil {
line, col, lineColOK = computeLineFromPos(query, int(pos))
}
}
message := fmt.Sprintf("migration failed: %s", pgErr.Message)
if lineColOK {
message = fmt.Sprintf("%s (column %d)", message, col)
}
if pgErr.Detail != "" {
message = fmt.Sprintf("%s, %s", message, pgErr.Detail)
}
return database.Error{OrigErr: err, Err: message, Query: migr, Line: line}
}
return database.Error{OrigErr: err, Err: "migration failed", Query: migr}
}
return nil
}
func computeLineFromPos(s string, pos int) (line uint, col uint, ok bool) {
// replace crlf with lf
s = strings.Replace(s, "\r\n", "\n", -1)
// pg docs: pos uses index 1 for the first character, and positions are measured in characters not bytes
runes := []rune(s)
if pos > len(runes) {
return 0, 0, false
}
sel := runes[:pos]
line = uint(runesCount(sel, newLine) + 1)
col = uint(pos - 1 - runesLastIndex(sel, newLine))
return line, col, true
}
const newLine = '\n'
func runesCount(input []rune, target rune) int {
var count int
for _, r := range input {
if r == target {
count++
}
}
return count
}
func runesLastIndex(input []rune, target rune) int {
for i := len(input) - 1; i >= 0; i-- {
if input[i] == target {
return i
}
}
return -1
}
func (p *Postgres) SetVersion(version int, dirty bool) error {
tx, err := p.conn.BeginTx(context.Background(), &sql.TxOptions{})
if err != nil {
return &database.Error{OrigErr: err, Err: "transaction start failed"}
}
query := `TRUNCATE "` + p.config.MigrationsTable + `"`
if _, err := tx.Exec(query); err != nil {
tx.Rollback()
return &database.Error{OrigErr: err, Query: []byte(query)}
}
if version >= 0 {
query = `INSERT INTO "` + p.config.MigrationsTable + `" (version, dirty) VALUES ($1, $2)`
if _, err := tx.Exec(query, version, dirty); err != nil {
tx.Rollback()
return &database.Error{OrigErr: err, Query: []byte(query)}
}
}
if err := tx.Commit(); err != nil {
return &database.Error{OrigErr: err, Err: "transaction commit failed"}
}
return nil
}
func (p *Postgres) Version() (version int, dirty bool, err error) {
query := `SELECT version, dirty FROM "` + p.config.MigrationsTable + `" LIMIT 1`
err = p.conn.QueryRowContext(context.Background(), query).Scan(&version, &dirty)
switch {
case err == sql.ErrNoRows:
return database.NilVersion, false, nil
case err != nil:
if e, ok := err.(*pq.Error); ok {
if e.Code.Name() == "undefined_table" {
return database.NilVersion, false, nil
}
}
return 0, false, &database.Error{OrigErr: err, Query: []byte(query)}
default:
return version, dirty, nil
}
}
func (p *Postgres) Drop() error {
// select all tables in current schema
query := `SELECT table_name FROM information_schema.tables WHERE table_schema=(SELECT current_schema())`
tables, err := p.conn.QueryContext(context.Background(), query)
if err != nil {
return &database.Error{OrigErr: err, Query: []byte(query)}
}
defer tables.Close()
// delete one table after another
tableNames := make([]string, 0)
for tables.Next() {
var tableName string
if err := tables.Scan(&tableName); err != nil {
return err
}
if len(tableName) > 0 {
tableNames = append(tableNames, tableName)
}
}
if len(tableNames) > 0 {
// delete one by one ...
for _, t := range tableNames {
query = `DROP TABLE IF EXISTS ` + t + ` CASCADE`
if _, err := p.conn.ExecContext(context.Background(), query); err != nil {
return &database.Error{OrigErr: err, Query: []byte(query)}
}
}
if err := p.ensureVersionTable(); err != nil {
return err
}
}
return nil
}
func (p *Postgres) ensureVersionTable() error {
// check if migration table exists
var count int
query := `SELECT COUNT(1) FROM information_schema.tables WHERE table_name = $1 AND table_schema = (SELECT current_schema()) LIMIT 1`
if err := p.conn.QueryRowContext(context.Background(), query, p.config.MigrationsTable).Scan(&count); err != nil {
return &database.Error{OrigErr: err, Query: []byte(query)}
}
if count == 1 {
return nil
}
// if not, create the empty migration table
query = `CREATE TABLE "` + p.config.MigrationsTable + `" (version bigint not null primary key, dirty boolean not null)`
if _, err := p.conn.ExecContext(context.Background(), query); err != nil {
return &database.Error{OrigErr: err, Query: []byte(query)}
}
return nil
}