private void ServerThread_DoWork(Object args)
{
Object[] arg = (Object[])args;
int port = (int)arg[0];
IPAddress ifaceip = (IPAddress)arg[1];
//Boolean natt = (Boolean)arg[2];
TcpListener listener = null;
List<connection> clients = new List<connection>();
int threadsleep = 100;
listener = new TcpListener(ifaceip, port);
listener.Start();
while (true)
{
// Break loop if cancel pending
if (_cancel)
{
_cancel = false;
listener.Stop();
foreach(connection c in clients)
{
c.Client.Client.Disconnect(false);
c.Client.Close();
}
clients.Clear();
return;
}
// Establishes new Client connections and adds them to the list to b
// processed.
while (listener.Pending())
{
TcpClient client = listener.AcceptTcpClient();
//client.NoDelay = true;
//client.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.KeepAlive, true);
connection tcc = new connection();
tcc.Client = client;
tcc.ConnectionEstablished = DateTime.Now;
clients.Insert(0, tcc);
}
// Create a copy to work on instead of working directly on
// the list.
connection[] nowclients = clients.ToArray ();
#if DEBUG_CON
if(nowclients.Length != lastclientc) {
lastclientc = nowclients.Length;
Console.Error.WriteLine("Client Connections: " + lastclientc);
}
#endif
// This thread has the potential to lock up the whole
// pc if there are no connections to process. Here
// we attempt to put in some sleep time if there are
// no connections. This might require some tweaking.
if(nowclients.Length > 0)
threadsleep = 10;
else
threadsleep = 500;
try
{
#region Main Loop
for (int i = 0; i < nowclients.Length; i++)
{
// Skip Clients that are processing.
if (nowclients[i].processing)
{
continue;
}
else if(nowclients[i].is_disposed) {
nowclients[i].Tag = null;
clients.Remove(nowclients[i]);
}
// Remove clients that have disconnected.
else if (!nowclients[i].Client.Connected || nowclients[i].Client.Client.Poll(1, SelectMode.SelectError))
{
nowclients[i].Close();
nowclients[i].Tag = null;
clients.Remove(nowclients[i]);
continue;
}
// This fires the main process
else if (!nowclients[i].processing && !nowclients[i].is_disposed && nowclients[i].data_available)
{
nowclients[i].processing = true;
nowclients[i].lifespans += 1;
nowclients[i].ActivityUpdate();
HandleRequest(nowclients[i]);
continue;
}
// Disconnect clients that have been idle for too long.
if(!nowclients[i].processing && (DateTime.Now - nowclients[i].LastActivity) > TimeSpan.FromSeconds(_idle_timeount)) {
nowclients[i].Close();
nowclients[i].Tag = null;
clients.Remove(nowclients[i]);
}
}
// Believe it or not this is extremely important.
// Without this line, this thread can lock the entire
// computer up.
Thread.Sleep(threadsleep);
#endregion
}
catch (Exception ex)
{
#if DEBUG
Console.Error.WriteLine(ex.Message);
Console.Error.WriteLine(ex.StackTrace);
#endif
throw ex;
}
}
}
public abstract void HandleRequest(connection cc);
public override void HandleRequest(connection cc)
{
ParameterizedThreadStart pts = new ParameterizedThreadStart(worker_DoWork);
Thread t = new Thread(pts);
t.IsBackground = false;
t.Priority = ThreadPriority.Normal;
t.Start(new Object[] { cc,_scripters });
}
public static proxied_http_response Create(http_request req, connection con)
{
if (req.Header.Values.ContainsKey("Proxy-Connection"))
{
String pcon = req.Header.GetValue("Proxy-Connection");
req.Header.Values.Remove("Proxy-Connection");
if (String.IsNullOrEmpty(pcon) == false)
req.Header.SetValue("Connection", pcon);
}
//ALL CUSTOM TAGS MUST BE REMOVED BEFORE SENDING HEADERS.
//THIS IS FOR ONE TAG, NEEDS TO BE MORE ABSTACT. SUCH AS
//REMOVE ALL "X-ANYTHING" TAGS. NEED TO FIND A WAY TO DO
//THIS IN THE HEADER LOGIC POSSIBLY!
if(req.Header.Values.ContainsKey("X-Profile"))
req.Header.Values.Remove("X-Profile");
// Formatting the proper header needs to happen before now
// Correcting Target header.
if(req.Header.Target.ToLower().StartsWith("http"))
{
if(req.Uri.OriginalString.Contains(String.Format("{0}:{1}",req.Uri.Host,req.Uri.Port)))
{
req.Header.Target = req.Uri.OriginalString.Substring(
req.Uri.OriginalString.IndexOf(String.Format("{0}:{1}",req.Uri.Host,req.Uri.Port)) +
String.Format("{0}:{1}",req.Uri.Host,req.Uri.Port).Length);
}
else
{
req.Header.Target = req.Uri.OriginalString.Substring(
req.Uri.OriginalString.IndexOf(req.Uri.Host) + req.Uri.Host.Length);
}
}
#if !OFFLINE_DEBUG
if(con.data_available)
{
#if DEBUG
byte[] bytes = con.read();
Console.Error.WriteLine(String.Format("{0}: {1}","EARLY SERVER DATA!",Encoding.Default.GetString(bytes)));
#endif
proxied_retry_exception ex =
new proxied_retry_exception(req,"We have not sent a request, yet the server has sent us something! This should not happen ever!",null,502);
ex.secure = con.stream is SslStream;
throw ex;
}
///Send Request
if (con.Client.Connected)
{
if (con.Client.Client.Poll(1, SelectMode.SelectWrite) && !con.Client.Client.Poll(1,SelectMode.SelectError))
{
///req.toByteArray() should be the entire request including POST!
byte[] requestbytes = req.ToByteArray();
try {
con.stream.Write(requestbytes, 0, requestbytes.Length);
con.stream.Flush();
} catch {
proxied_retry_exception ex = new proxied_retry_exception(req,"Can not send request upstream!",null,502);
ex.secure = con.stream is SslStream;
throw ex;
}
}
else {
proxied_retry_exception ex = new proxied_retry_exception(req,"Can not send request upstream!",null,502);
ex.secure = con.stream is SslStream;
throw ex;
}
}
else {
proxied_retry_exception ex = new proxied_retry_exception(req,"Upstream server disconnected while send request!",null,502);
ex.secure = con.stream is SslStream;
throw ex;
}
//wait for data
int count = 0;
while (!con.is_disposed && !con.data_available && count < 3000 && con.Client.Client.Connected && req.Connection.Client.Connected &&
!con.Client.Client.Poll(1, SelectMode.SelectError) && !req.Connection.Client.Poll(1, SelectMode.SelectError))
{
//if(server.Client.Poll(100, SelectMode.SelectRead))
// throw new Exception("Server connection failed!");
if(count == 2999) {
proxied_retry_exception ex = new proxied_retry_exception(req,"Server failed to respond in a timely manner after sending request!",null,502);
ex.secure = con.stream is SslStream;
throw ex;
}
System.Threading.Thread.Sleep(100);
count += 1;
}
#endif
proxied_http_response pres = new proxied_http_response();
pres.Request = req;
return pres;
}
public override void Initialize (connection con)
{
try {
base.Initialize (con);
} catch (Exception ex) {
#if DEBUG
if(_request != null)
Console.Error.WriteLine("Error: " +_request.Uri.ToString());
Console.Error.WriteLine(ex.Message);
Console.Error.WriteLine(ex.StackTrace);
#endif
proxied_retry_exception ex1 = new proxied_retry_exception(
this.Request,"Response init problem",ex,502);
ex1.secure = con.stream is SslStream;
this.Errors.Add(ex1);
throw ex1;
}
if(Header.Statuscode == "408") {
proxied_retry_exception ex = new proxied_retry_exception(
this.Request,"Server replied with 'bad request'",null,408);
ex.secure = con.stream is SslStream;
this.Errors.Add(ex);
throw ex;
}
}
public virtual void Initialize(connection con)
{
_connection = con.Client;
_neworkStream = con.stream;
_neworkStream.WriteTimeout = 10000;
_neworkStream.ReadTimeout = 10000;
int headersplit = -1;
Boolean headerfound = false;
long ContentLength = -1;
int constpasses = 0;
byte[] readbytes = null;
List<byte> allbytes = new List<byte>();
while (con.Client.Connected && !con.Client.Client.Poll(1, SelectMode.SelectError))
{
if (_cancel)
break;
if (con.data_available)
{
//find the header first. Due to wacky initialization bytes are stored globally until header is found;
readbytes = con.read();
if (headerfound == false)
{
allbytes.AddRange(readbytes);
//check for header!
headersplit = http_function.FindHeaderBodySplit(allbytes.ToArray());
if (headersplit > 0)
{
//Creates the header object and writes the intital
//bytes to body if there are any
HandleInitialBytes(allbytes.ToArray(),headersplit);
CreateUri();
headerfound = true;
//Optimizations based on header
// I can't measure how effective they are... yet.
//Post data is not included in a head or get request.
//So we know we are done regardless of the
//Content-Length.
if(_header.Verb == "GET" || _header.Verb == "CONNECT" || _header.Verb == "HEAD" )
_cancel = true;
//If we have a Content-Length then we have a definate
//place to end the read.
if (_header.Values.ContainsKey("Content-Length"))
{
ContentLength = Convert.ToInt64(_header.Values["Content-Length"]);
if(ContentLength == 0)
_cancel = true;
//_timeOut = _timeOut * 2;
}
//Allow a little more time for the server to process post data
//Might come in handy when uploading files.
if (_header.Verb == "POST") {
if(!_header.Values.ContainsKey("Content-Length"))
{
http_exception ex = new http_exception(this,"Content-Length is mandatory!",null,411);
ex.add_header("Connection","close");
throw ex;
}
//_timeOut = _timeOut * 2;
}
if(!string.IsNullOrEmpty(_header.Verb) && string.IsNullOrEmpty(this.Host)) {
throw new Exception("request requires a host!");
}
//When there is a transfer-encoding there is usually no
//Content-Length and the file size is unknown so
//there is no exact point where we no we can end this read
//For good measure we are giving a little more time.
//if (_header.Values.ContainsKey("Transfer-Encoding"))
// if (_header.GetValue("Transfer-Encoding").ToLower() == "chunked")
// _timeOut = _timeOut * 2;
}
}
else //headerfound == false
{
// Make sure that bytes is not empty very important.
if (readbytes.Length > 0)
{
//Writing bytes to body file!
AppendBytesToFile(readbytes);
// Part of a hard timeout implemented as a death counter
// in ProxyTransaction.
if(Activity!=null){Activity(this,new EventArgs());}
constpasses = 0;
}
}
}
else //client.Available <= 0
{
if (headerfound)
{
if (ContentLength == 0 )
{
_cancel = true;
}
//There is a Content-Length and it's greater than 0 but Body.Length is
//less than Content-Length. Basically we are in mid-transfer
else if (ContentLength > 0)
{
if (Body.Length < ContentLength)
{
Thread.Sleep(10);
constpasses = constpasses + 1;
}
else if(Body.Length == ContentLength) {
_cancel = true;
}
}
//There is no Content-Length so we are using the timeout.
else if(ContentLength < 0)
{
if(_header.Httpversion == "HTTP/1.0")
_cancel = true;
Thread.Sleep(10);
constpasses = constpasses + 1;
}
}
else {
Thread.Sleep(10);
constpasses = constpasses +1;
}
//Checking for timeout situation.
if (constpasses >= (_timeOut / 10))
{
Exception ex = new Exception("Read Timeout!");
_errors.Add(ex);
//if (ReadTimeOut != null) { ReadTimeOut(this, new EventArgs()); }
//throw ex;
_cancel = true;
}
}
}
if(! headerfound && _header.Connection.ToLower() != "close")
if(!con.Client.Client.Connected || con.Client.Client.Poll(1, SelectMode.SelectError))
throw new Exception("hr: Client Disconnected!");
if(headerfound && _header != null && _header.Verb != "HEAD" && _header.Statuscode != " 206" && _header.Values.ContainsKey("Content-Length")) {
if(Convert.ToInt32(_body.Length) != _header.ContentLength) {
#if DEBUG
Console.Error.WriteLine(String.Format("Entity size mismatch {0}/{1}",_header.ContentLength,_body.Length));
#endif
_header.ContentLength = Convert.ToInt32(_body.Length);
}
}
if (headerfound == false || _header == null)
{
if(allbytes.Count == 0)
{
throw new Exception("Zero bytes have been recieved!");
}
else
{
throw new Exception("The request/response did not seem to have the http head/body dilimeter (CRLFCRLF)");
}
}
}
