besterd/source/app.d

141 lines
3.8 KiB
D

module besterd;
import server.server : BesterServer;
import std.conv : to;
import std.socket : SocketOSException, parseAddress, UnixAddress;
import utils.debugging : dprint;
import std.stdio : File, writeln;
import std.json : parseJSON, JSONValue;
import listeners.listener : BesterListener, BesterListenerException;
import listeners.types : TCP4Listener, TCP6Listener, UNIXListener;
import std.file : exists;
void main(string[] args)
{
/* Make sure we have atleast two arguments */
if(args.length >= 2)
{
/* Get the second argument for configuration file path */
string configFilePath = args[1];
/* Start thhe server if the file exists, else show an error */
if(exists(configFilePath))
{
startServer(args[1]);
}
else
{
writeln("Provided server configuration file \"" ~ configFilePath ~ "\" does not exist");
}
}
/* TODO: Add usage check and arguments before this */
dprint("Main finished, remaining threads are keeping this open if it hangs");
/* TODO: Install signal handler so a shutdown can trigger shutdown */
}
private JSONValue getConfig(string configurationFilePath)
{
/* TODO: Open the file here */
File configFile;
configFile.open(configurationFilePath);
/* The file buffer */
byte[] fileBuffer;
/* Allocate the buffer to be the size of the file */
fileBuffer.length = configFile.size();
/* Read the content of the file */
/* TODO: Error handling ErrnoException */
fileBuffer = configFile.rawRead(fileBuffer);
configFile.close();
JSONValue config;
/* TODO: JSON error checking */
config = parseJSON(cast(string)fileBuffer);
return config;
}
private BesterListener[] getListeners(BesterServer server, JSONValue networkBlock)
{
BesterListener[] listeners;
/* TODO: Error handling and get keys and clean up for formality */
try
{
/* Look for IPv4 TCP block */
JSONValue inet4TCPBlock = networkBlock["tcp4"];
dprint("<<< IPv4 TCP Block >>>\n" ~ inet4TCPBlock.toPrettyString());
string inet4Address = inet4TCPBlock["address"].str();
ushort inet4Port = to!(ushort)(inet4TCPBlock["port"].str());
TCP4Listener tcp4Listener = new TCP4Listener(server, parseAddress(inet4Address, inet4Port));
listeners ~= tcp4Listener;
/* Look for IPv6 TCP block */
JSONValue inet6TCPBlock = networkBlock["tcp6"];
dprint("<<< IPv6 TCP Block >>>\n" ~ inet6TCPBlock.toPrettyString());
string inet6Address = inet6TCPBlock["address"].str();
ushort inet6Port = to!(ushort)(inet6TCPBlock["port"].str());
TCP6Listener tcp6Listener = new TCP6Listener(server, parseAddress(inet6Address, inet6Port));
listeners ~= tcp6Listener;
/* Look for UNIX Domain block */
JSONValue unixDomainBlock = networkBlock["unix"];
dprint("<<< UNIX Domain Block >>>\n" ~ unixDomainBlock.toPrettyString());
string unixAddress = unixDomainBlock["address"].str();
// UNIXListener unixListener = new UNIXListener(server, new UnixAddress(unixAddress));
// listeners ~= unixListener;
}
catch(BesterListenerException e)
{
}
return listeners;
}
private void startServer(string configurationFilePath)
{
/* The server configuration */
JSONValue serverConfiguration = getConfig(configurationFilePath);
dprint("<<< Bester.d configuration >>>\n" ~ serverConfiguration.toPrettyString());
try
{
/* The server */
BesterServer server = null;
/* TODO: Bounds anc type checking */
/* Get the network block */
JSONValue networkBlock = serverConfiguration["network"];
/* Create the Bester server */
server = new BesterServer(serverConfiguration);
/* TODO: Get keys */
BesterListener[] listeners = getListeners(server, networkBlock);
for(ulong i = 0; i < listeners.length; i++)
{
/* Add listener */
server.addListener(listeners[i]);
}
/* Start running the server (starts the listeners) */
server.run();
}
catch(SocketOSException exception)
{
dprint("Error binding: " ~ exception.toString());
}
}