void targetSendBackLoop(object o)
{
ManagedProxyStream stream = o as ManagedProxyStream;
TimeSpan sleepTime = TimeSpan.FromMilliseconds(200);
try
{
while (this.running)
{
// if no data available, wait for a while
if (stream.TargetClient.Connected && stream.TargetClient.Available == 0)
{
Thread.Sleep(sleepTime);
}
// if data coming
else
{
byte[] data;
// receive data
using (var t = new MemoryStream())
{
var buf = new byte[stream.TargetClient.ReceiveBufferSize];
lock (stream.IOLock)
{
do
{
var bytes = stream.TargetStream.Read(buf, 0, buf.Length);
t.Write(buf, 0, bytes);
} while (stream.TargetClient.Available > 0);
stream.LastUsed = DateTime.Now;
}
data = t.ToArray();
}
// pack as ManagedEvent
var e = new ManagedProxyEvent();
e.Data = data;
e.Sender = SenderType.Target;
e.EventType = ProxyEventType.IncomingMessage;
//parse the endpoint
string str = Encoding.UTF8.GetString(data);
e.Text = str;
// try to parse as http
try
{
HttpResponse res = new HttpResponse();
res.Parse(e.Text);
e.ParsedHttpResponse = res;
}
// if not http message
catch
{
e.EventType = ProxyEventType.Unknown;
}
finally
{
byte[] tosend = e.Data;
if (ReceiveMessageFromTargetCallback != null)
{
byte[] replacedResponse = ReceiveMessageFromTargetCallback(e);
if (replacedResponse != null)
{
tosend = replacedResponse;
}
}
if (tosend == null)
{
// OACR do not allow throwing exception in a final clause
Trace.Fail("tosend is null");
}
lock (stream)
{
stream.SourceStream.Write(tosend, 0, tosend.Length);
}
}
}
}
}
catch (Exception)
{
}
}
private void ReceiveLoop(object o)
{
TimeSpan idleTime = TimeSpan.FromMilliseconds(0);
TimeSpan sleepTime = TimeSpan.FromMilliseconds(200);
Stream s;
Stream targetS;
System.Threading.Thread targetSideThread = new Thread(new ParameterizedThreadStart(targetSendBackLoop));
X509Certificate2 currentTargetClientCert = null;
lock (clientCertLocker)
{
currentTargetClientCert = clientCert;
}
using (TcpClient targetServerCon = new TcpClient(targetServerIP, targetServerPort))
{
using (var c = o as TcpClient)
{
if (this.useSSL)
{
SslStream ssl2 = connectToTargetSSLPort(targetServerCon);
targetS = ssl2;
SslStream ssl = new SslStream(c.GetStream(), false, this.proxySideUserCertificateValidationCallback, this.proxySideServerCertificateSelectionCallback, this.encryptionPolicy);
ssl.AuthenticateAsServer(this.serverCert, false, System.Security.Authentication.SslProtocols.Tls, false);
s = ssl;
}
else
{
s = c.GetStream();
targetS = targetServerCon.GetStream();
}
// cache stream
var ms = new ManagedProxyStream();
this.clientStreams.Add(ms);
ms.SourceClient = c;
ms.TargetClient = targetServerCon;
ms.SourceStream = s;
ms.TargetStream = targetS;
if (SSLConnectedCallback != null)
{
SSLConnectedCallback(ms);
}
targetSideThread.Start(ms);
using (s)
{
while (this.running)
{
// if no data available, wait for a while
if (c.Available == 0)
{
Thread.Sleep(sleepTime);
idleTime += sleepTime;
}
// if data coming
else
{
idleTime = TimeSpan.FromMilliseconds(0);
byte[] data;
// receive data
using (var t = new MemoryStream())
{
var buf = new byte[c.ReceiveBufferSize];
lock (ms.IOLock)
{
do
{
var bytes = s.Read(buf, 0, buf.Length);
t.Write(buf, 0, bytes);
System.Threading.Thread.Sleep(50);
} while (c.Available > 0);
ms.LastUsed = DateTime.Now;
}
data = t.ToArray();
}
// pack as ManagedEvent
var e = new ManagedProxyEvent();
e.Data = data;
e.Sender = SenderType.Source;
e.EventType = ProxyEventType.IncomingMessage;
lock (clientCertLocker)
{
if (0 != string.Compare(clientCert.Thumbprint.ToLower(), currentTargetClientCert.Thumbprint.ToLower()))
{
currentTargetClientCert = clientCert;
ms.TargetClient.Close();
TcpClient targetCon = new TcpClient(targetServerIP, targetServerPort);
SslStream ssl2 = connectToTargetSSLPort(targetCon);
targetS = ssl2;
ms.TargetClient = targetCon;
ms.TargetStream = ssl2;
targetSideThread = new Thread(new ParameterizedThreadStart(targetSendBackLoop));
if (SSLConnectedCallback != null)
{
SSLConnectedCallback(ms);
}
targetSideThread.Start(ms);
}
}
//parse the endpoint
string str = Encoding.UTF8.GetString(data);
e.Text = str;
// try to parse as http
try
{
HttpRequest req = new HttpRequest();
req.Parse(e.Text);
e.ParsedHttpRequest = req;
}
// if not http message
catch
{
e.EventType = ProxyEventType.Unknown;
}
finally
{
byte[] tosend = e.Data;
if (ReceiveMessageFromSourceCallback != null)
{
tosend = ReceiveMessageFromSourceCallback(e);
}
if (tosend != null)
{
if (!ms.TargetClient.Connected)
{
ms.TargetClient = new TcpClient(targetServerIP, targetServerPort);
if (useSSL)
{
ms.TargetStream = connectToTargetSSLPort(ms.TargetClient);
}
targetSideThread = new Thread(new ParameterizedThreadStart(targetSendBackLoop));
targetSideThread.Start(ms);
}
ms.TargetStream.Write(tosend, 0, tosend.Length);
}
}
}
}
}
}
}
}