191 lines
7.3 KiB
Python
191 lines
7.3 KiB
Python
import os, msgpack, shutil, gevent, socket, struct, random
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from cStringIO import StringIO
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from Debug import Debug
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from Config import config
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from util import RateLimit, StreamingMsgpack
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FILE_BUFF = 1024*512
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# Request from me
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class FileRequest(object):
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__slots__ = ("server", "connection", "req_id", "sites", "log", "responded")
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def __init__(self, server, connection):
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self.server = server
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self.connection = connection
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self.req_id = None
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self.sites = self.server.sites
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self.log = server.log
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self.responded = False # Responded to the request
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def unpackAddress(self, packed):
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return (socket.inet_ntoa(packed[0:4]), struct.unpack_from("H", packed, 4)[0])
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def send(self, msg, streaming=False):
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if not self.connection.closed:
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self.connection.send(msg, streaming)
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def response(self, msg, streaming=False):
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if self.responded:
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self.log.debug("Req id %s already responded" % self.req_id)
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return
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if not isinstance(msg, dict): # If msg not a dict create a {"body": msg}
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msg = {"body": msg}
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msg["cmd"] = "response"
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msg["to"] = self.req_id
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self.responded = True
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self.send(msg, streaming=streaming)
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# Route file requests
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def route(self, cmd, req_id, params):
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self.req_id = req_id
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if cmd == "getFile":
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self.actionGetFile(params)
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elif cmd == "update":
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event = "%s update %s %s" % (self.connection.id, params["site"], params["inner_path"])
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if not RateLimit.isAllowed(event): # There was already an updat for this file in the last 10 second
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self.response({"ok": "File update queued"})
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RateLimit.callAsync(event, 10, self.actionUpdate, params) # If called more than once within 10 sec only keep the last update
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elif cmd == "pex":
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self.actionPex(params)
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elif cmd == "listModified":
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self.actionListModified(params)
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elif cmd == "ping":
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self.actionPing()
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else:
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self.actionUnknown(cmd, params)
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# Update a site file request
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def actionUpdate(self, params):
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site = self.sites.get(params["site"])
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if not site or not site.settings["serving"]: # Site unknown or not serving
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self.response({"error": "Unknown site"})
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return False
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if site.settings["own"] and params["inner_path"].endswith("content.json"):
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self.log.debug("Someone trying to push a file to own site %s, reload local %s first" % (site.address, params["inner_path"]))
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changed = site.content_manager.loadContent(params["inner_path"], add_bad_files=False)
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if changed: # Content.json changed locally
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site.settings["size"] = site.content_manager.getTotalSize() # Update site size
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buff = StringIO(params["body"])
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valid = site.content_manager.verifyFile(params["inner_path"], buff)
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if valid == True: # Valid and changed
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self.log.info("Update for %s looks valid, saving..." % params["inner_path"])
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buff.seek(0)
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site.storage.write(params["inner_path"], buff)
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site.onFileDone(params["inner_path"]) # Trigger filedone
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if params["inner_path"].endswith("content.json"): # Download every changed file from peer
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peer = site.addPeer(self.connection.ip, self.connection.port, return_peer = True) # Add or get peer
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site.onComplete.once(lambda: site.publish(inner_path=params["inner_path"]), "publish_%s" % params["inner_path"]) # On complete publish to other peers
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gevent.spawn(
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lambda: site.downloadContent(params["inner_path"], peer=peer)
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) # Load new content file and download changed files in new thread
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self.response({"ok": "Thanks, file %s updated!" % params["inner_path"]})
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elif valid == None: # Not changed
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peer = site.addPeer(*params["peer"], return_peer = True) # Add or get peer
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if peer:
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self.log.debug("Same version, adding new peer for locked files: %s, tasks: %s" % (peer.key, len(site.worker_manager.tasks)) )
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for task in site.worker_manager.tasks: # New peer add to every ongoing task
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if task["peers"]: site.needFile(task["inner_path"], peer=peer, update=True, blocking=False) # Download file from this peer too if its peer locked
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self.response({"ok": "File not changed"})
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else: # Invalid sign or sha1 hash
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self.log.debug("Update for %s is invalid" % params["inner_path"])
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self.response({"error": "File invalid"})
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# Send file content request
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def actionGetFile(self, params):
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site = self.sites.get(params["site"])
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if not site or not site.settings["serving"]: # Site unknown or not serving
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self.response({"error": "Unknown site"})
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return False
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try:
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file_path = site.storage.getPath(params["inner_path"])
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if config.debug_socket: self.log.debug("Opening file: %s" % file_path)
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with StreamingMsgpack.FilePart(file_path, "rb") as file:
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file.seek(params["location"])
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file.read_bytes = FILE_BUFF
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back = {}
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back["body"] = file
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back["size"] = os.fstat(file.fileno()).st_size
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back["location"] = min(file.tell()+FILE_BUFF, back["size"])
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if config.debug_socket: self.log.debug("Sending file %s from position %s to %s" % (file_path, params["location"], back["location"]))
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self.response(back, streaming=True)
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if config.debug_socket: self.log.debug("File %s sent" % file_path)
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# Add peer to site if not added before
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connected_peer = site.addPeer(self.connection.ip, self.connection.port)
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if connected_peer: # Just added
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connected_peer.connect(self.connection) # Assign current connection to peer
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except Exception, err:
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self.log.debug("GetFile read error: %s" % Debug.formatException(err))
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self.response({"error": "File read error: %s" % Debug.formatException(err)})
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return False
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# Peer exchange request
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def actionPex(self, params):
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site = self.sites.get(params["site"])
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if not site or not site.settings["serving"]: # Site unknown or not serving
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self.response({"error": "Unknown site"})
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return False
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got_peer_keys = []
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added = 0
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connected_peer = site.addPeer(self.connection.ip, self.connection.port) # Add requester peer to site
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if connected_peer: # Just added
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added +=1
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connected_peer.connect(self.connection) # Assign current connection to peer
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for peer in params["peers"]: # Add sent peers to site
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address = self.unpackAddress(peer)
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got_peer_keys.append("%s:%s" % address)
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if site.addPeer(*address): added += 1
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# Send back peers that is not in the sent list and connectable (not port 0)
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packed_peers = [peer.packAddress() for peer in site.getConnectablePeers(params["need"], got_peer_keys)]
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if added:
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site.worker_manager.onPeers()
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self.log.debug("Added %s peers to %s using pex, sending back %s" % (added, site, len(packed_peers)))
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self.response({"peers": packed_peers})
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# Get modified content.json files since
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def actionListModified(self, params):
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site = self.sites.get(params["site"])
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if not site or not site.settings["serving"]: # Site unknown or not serving
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self.response({"error": "Unknown site"})
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return False
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modified_files = {inner_path: content["modified"] for inner_path, content in site.content_manager.contents.iteritems() if content["modified"] > params["since"]}
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# Add peer to site if not added before
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connected_peer = site.addPeer(self.connection.ip, self.connection.port)
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if connected_peer: # Just added
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connected_peer.connect(self.connection) # Assign current connection to peer
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self.response({"modified_files": modified_files})
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# Send a simple Pong! answer
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def actionPing(self):
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self.response("Pong!")
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# Unknown command
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def actionUnknown(self, cmd, params):
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self.response({"error": "Unknown command: %s" % cmd})
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