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executable file 187 lines (143 sloc) 6.664 kb
// SparkleShare, a collaboration and sharing tool.
// Copyright (C) 2010 Hylke Bons <hylkebons@gmail.com>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
using System;
using System.IO;
using System.Text;
using System.Threading;
using System.Net.Sockets;
using System.Security.Cryptography;
using System.Collections.Generic;
using System.Xml.Serialization;
namespace SparkleLib {
public class SparkleListenerTcp : SparkleListenerBase {
private Thread thread;
// these are shared
private readonly Object mutex = new Object();
private Socket socket;
private bool connected;
public SparkleListenerTcp (Uri server, string folder_identifier) :
base (server, folder_identifier)
{
base.channels.Add (folder_identifier);
this.connected = false;
}
public override bool IsConnected {
get {
bool result = false;
lock (this.mutex) {
result = this.connected;
}
return result;
}
}
// Starts a new thread and listens to the channel
public override void Connect ()
{
SparkleHelpers.DebugInfo ("ListenerTcp", "Connecting to " + Server.Host);
base.is_connecting = true;
this.thread = new Thread (
new ThreadStart (delegate {
try {
// Connect and subscribe to the channel
int port = Server.Port;
if (port < 0) port = 9999;
lock (this.mutex) {
this.socket = new Socket (AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
this.socket.Connect (Server.Host, port);
base.is_connecting = false;
this.connected = true;
OnConnected ();
foreach (string channel in base.channels) {
SparkleHelpers.DebugInfo ("ListenerTcp", "Subscribing to channel " + channel);
this.socket.Send (Encoding.UTF8.GetBytes ("subscribe " + channel + "\n"));
}
}
byte [] bytes = new byte [4096];
// List to the channels, this blocks the thread
while (this.socket.Connected) {
int bytes_read = this.socket.Receive (bytes);
if (bytes_read > 0) {
string received = Encoding.UTF8.GetString (bytes);
string line = received.Substring (0, received.IndexOf ("\n"));
if (!line.Contains ("!"))
continue;
string folder_identifier = line.Substring (0, line.IndexOf ("!"));
string message = this.CleanMessage (line.Substring (line.IndexOf ("!") + 1));
if (!folder_identifier.Equals("debug") &&
!String.IsNullOrEmpty(message))
OnAnnouncement (new SparkleAnnouncement (folder_identifier, message));
} else {
SparkleHelpers.DebugInfo ("ListenerTcp", "Error on socket");
lock (this.mutex) {
this.socket.Close ();
this.connected = false;
OnDisconnected ();
}
}
}
SparkleHelpers.DebugInfo ("ListenerTcp", "Disconnected from " + Server.Host);
} catch (SocketException e) {
SparkleHelpers.DebugInfo ("ListenerTcp", "Could not connect to " + Server + ": " + e.Message);
OnDisconnected ();
}
})
);
this.thread.Start ();
}
public override void AlsoListenTo (string folder_identifier)
{
string channel = folder_identifier;
if (!base.channels.Contains (channel)) {
base.channels.Add (channel);
if (IsConnected) {
SparkleHelpers.DebugInfo ("ListenerTcp", "Subscribing to channel " + channel);
string to_send = "subscribe " + folder_identifier + "\n";
try {
lock (this.mutex) {
this.socket.Send (Encoding.UTF8.GetBytes (to_send));
}
} catch (SocketException e) {
SparkleHelpers.DebugInfo ("ListenerTcp", "Could not connect to " + Server + ": " + e.Message);
OnDisconnected ();
}
}
}
}
public override void Announce (SparkleAnnouncement announcement)
{
string to_send = "announce " + announcement.FolderIdentifier
+ " " + announcement.Message + "\n";
try {
lock (this.mutex) {
this.socket.Send (Encoding.UTF8.GetBytes (to_send));
}
} catch (SocketException e) {
SparkleHelpers.DebugInfo ("ListenerTcp", "Could not connect to " + Server + ": " + e.Message);
OnDisconnected ();
}
}
public override void Dispose ()
{
this.thread.Abort ();
this.thread.Join ();
base.Dispose ();
}
private string CleanMessage(string message)
{
return message.Trim ().Replace ("\n", "").Replace ("\0", "");
}
}
}
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