2 // System.Net.WebConnection
5 // Gonzalo Paniagua Javier (gonzalo@ximian.com)
7 // (C) 2003 Ximian, Inc (http://www.ximian.com)
11 // Permission is hereby granted, free of charge, to any person obtaining
12 // a copy of this software and associated documentation files (the
13 // "Software"), to deal in the Software without restriction, including
14 // without limitation the rights to use, copy, modify, merge, publish,
15 // distribute, sublicense, and/or sell copies of the Software, and to
16 // permit persons to whom the Software is furnished to do so, subject to
17 // the following conditions:
19 // The above copyright notice and this permission notice shall be
20 // included in all copies or substantial portions of the Software.
22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
32 using System.Collections;
33 using System.Net.Sockets;
34 using System.Security.Cryptography.X509Certificates;
36 using System.Threading;
37 using System.Diagnostics;
38 using Mono.Net.Security;
55 internal Socket socket;
56 object socketLock = new object ();
57 IWebConnectionState state;
58 WebExceptionStatus status;
59 WaitCallback initConn;
62 static AsyncCallback readDoneDelegate = new AsyncCallback (ReadDone);
63 EventHandler abortHandler;
64 AbortHelper abortHelper;
65 internal WebConnectionData Data;
67 ChunkStream chunkStream;
71 HttpWebRequest priority_request;
72 NetworkCredential ntlm_credentials;
73 bool ntlm_authenticated;
82 NtlmAuthState connect_ntlm_auth_state;
83 HttpWebRequest connect_request;
85 Exception connect_exception;
86 MonoTlsStream tlsStream;
88 #if MONOTOUCH && !MONOTOUCH_TV && !MONOTOUCH_WATCH
89 [System.Runtime.InteropServices.DllImport ("__Internal")]
90 static extern void xamarin_start_wwan (string uri);
93 internal ChunkStream ChunkStream {
94 get { return chunkStream; }
97 public WebConnection (IWebConnectionState wcs, ServicePoint sPoint)
100 this.sPoint = sPoint;
101 buffer = new byte [4096];
102 Data = new WebConnectionData ();
103 initConn = new WaitCallback (state => {
105 InitConnection (state);
108 queue = wcs.Group.Queue;
109 abortHelper = new AbortHelper ();
110 abortHelper.Connection = this;
111 abortHandler = new EventHandler (abortHelper.Abort);
115 public WebConnection Connection;
117 public void Abort (object sender, EventArgs args)
119 WebConnection other = ((HttpWebRequest) sender).WebConnection;
122 other.Abort (sender, args);
128 // The real condition is !(socket.Poll (0, SelectMode.SelectRead) || socket.Available != 0)
129 // but if there's data pending to read (!) we won't reuse the socket.
130 return (socket.Poll (0, SelectMode.SelectRead) == false);
133 void Connect (HttpWebRequest request)
136 if (socket != null && socket.Connected && status == WebExceptionStatus.Success) {
137 // Take the chunked stream to the expected state (State.None)
138 if (CanReuse () && CompleteChunkedRead ()) {
145 if (socket != null) {
151 IPHostEntry hostEntry = sPoint.HostEntry;
153 if (hostEntry == null) {
154 #if MONOTOUCH && !MONOTOUCH_TV && !MONOTOUCH_WATCH
155 xamarin_start_wwan (sPoint.Address.ToString ());
156 hostEntry = sPoint.HostEntry;
157 if (hostEntry == null) {
159 status = sPoint.UsesProxy ? WebExceptionStatus.ProxyNameResolutionFailure :
160 WebExceptionStatus.NameResolutionFailure;
162 #if MONOTOUCH && !MONOTOUCH_TV && !MONOTOUCH_WATCH
167 //WebConnectionData data = Data;
168 foreach (IPAddress address in hostEntry.AddressList) {
170 socket = new Socket (address.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
171 } catch (Exception se) {
172 // The Socket ctor can throw if we run out of FD's
173 if (!request.Aborted)
174 status = WebExceptionStatus.ConnectFailure;
175 connect_exception = se;
178 IPEndPoint remote = new IPEndPoint (address, sPoint.Address.Port);
179 socket.NoDelay = !sPoint.UseNagleAlgorithm;
181 sPoint.KeepAliveSetup (socket);
183 // Ignore. Not supported in all platforms.
186 if (!sPoint.CallEndPointDelegate (socket, remote)) {
189 status = WebExceptionStatus.ConnectFailure;
194 socket.Connect (remote);
195 status = WebExceptionStatus.Success;
197 } catch (ThreadAbortException) {
198 // program exiting...
204 } catch (ObjectDisposedException) {
205 // socket closed from another thread
207 } catch (Exception exc) {
212 if (!request.Aborted)
213 status = WebExceptionStatus.ConnectFailure;
214 connect_exception = exc;
221 bool CreateTunnel (HttpWebRequest request, Uri connectUri,
222 Stream stream, out byte[] buffer)
224 StringBuilder sb = new StringBuilder ();
225 sb.Append ("CONNECT ");
226 sb.Append (request.Address.Host);
228 sb.Append (request.Address.Port);
229 sb.Append (" HTTP/");
230 if (request.ServicePoint.ProtocolVersion == HttpVersion.Version11)
235 sb.Append ("\r\nHost: ");
236 sb.Append (request.Address.Authority);
239 var challenge = Data.Challenge;
240 Data.Challenge = null;
241 var auth_header = request.Headers ["Proxy-Authorization"];
242 bool have_auth = auth_header != null;
244 sb.Append ("\r\nProxy-Authorization: ");
245 sb.Append (auth_header);
246 ntlm = auth_header.ToUpper ().Contains ("NTLM");
247 } else if (challenge != null && Data.StatusCode == 407) {
248 ICredentials creds = request.Proxy.Credentials;
251 if (connect_request == null) {
252 // create a CONNECT request to use with Authenticate
253 connect_request = (HttpWebRequest)WebRequest.Create (
254 connectUri.Scheme + "://" + connectUri.Host + ":" + connectUri.Port + "/");
255 connect_request.Method = "CONNECT";
256 connect_request.Credentials = creds;
260 for (int i = 0; i < challenge.Length; i++) {
261 var auth = AuthenticationManager.Authenticate (challenge [i], connect_request, creds);
264 ntlm = (auth.ModuleAuthenticationType == "NTLM");
265 sb.Append ("\r\nProxy-Authorization: ");
266 sb.Append (auth.Message);
273 sb.Append ("\r\nProxy-Connection: keep-alive");
274 connect_ntlm_auth_state++;
277 sb.Append ("\r\n\r\n");
280 byte [] connectBytes = Encoding.Default.GetBytes (sb.ToString ());
281 stream.Write (connectBytes, 0, connectBytes.Length);
284 WebHeaderCollection result = ReadHeaders (stream, out buffer, out status);
285 if ((!have_auth || connect_ntlm_auth_state == NtlmAuthState.Challenge) &&
286 result != null && status == 407) { // Needs proxy auth
287 var connectionHeader = result ["Connection"];
288 if (socket != null && !string.IsNullOrEmpty (connectionHeader) &&
289 connectionHeader.ToLower() == "close") {
290 // The server is requesting that this connection be closed
295 Data.StatusCode = status;
296 Data.Challenge = result.GetValues ("Proxy-Authenticate");
297 Data.Headers = result;
302 Data.StatusCode = status;
303 Data.Headers = result;
307 return (result != null);
310 WebHeaderCollection ReadHeaders (Stream stream, out byte [] retBuffer, out int status)
315 byte [] buffer = new byte [1024];
316 MemoryStream ms = new MemoryStream ();
319 int n = stream.Read (buffer, 0, 1024);
321 HandleError (WebExceptionStatus.ServerProtocolViolation, null, "ReadHeaders");
325 ms.Write (buffer, 0, n);
328 bool gotStatus = false;
329 WebHeaderCollection headers = new WebHeaderCollection ();
330 while (ReadLine (ms.GetBuffer (), ref start, (int) ms.Length, ref str)) {
334 contentLen = int.Parse(headers["Content-Length"]);
340 if (ms.Length - start - contentLen > 0) {
341 // we've read more data than the response header and conents,
342 // give back extra data to the caller
343 retBuffer = new byte[ms.Length - start - contentLen];
344 Buffer.BlockCopy(ms.GetBuffer(), start + contentLen, retBuffer, 0, retBuffer.Length);
347 // haven't read in some or all of the contents for the response, do so now
348 FlushContents(stream, contentLen - (int)(ms.Length - start));
359 string[] parts = str.Split (' ');
360 if (parts.Length < 2) {
361 HandleError (WebExceptionStatus.ServerProtocolViolation, null, "ReadHeaders2");
365 if (String.Compare (parts [0], "HTTP/1.1", true) == 0)
366 Data.ProxyVersion = HttpVersion.Version11;
367 else if (String.Compare (parts [0], "HTTP/1.0", true) == 0)
368 Data.ProxyVersion = HttpVersion.Version10;
370 HandleError (WebExceptionStatus.ServerProtocolViolation, null, "ReadHeaders2");
374 status = (int)UInt32.Parse (parts [1]);
375 if (parts.Length >= 3)
376 Data.StatusDescription = String.Join (" ", parts, 2, parts.Length - 2);
383 void FlushContents(Stream stream, int contentLength)
385 while (contentLength > 0) {
386 byte[] contentBuffer = new byte[contentLength];
387 int bytesRead = stream.Read(contentBuffer, 0, contentLength);
389 contentLength -= bytesRead;
397 bool CreateStream (HttpWebRequest request)
400 NetworkStream serverStream = new NetworkStream (socket, false);
402 if (request.Address.Scheme == Uri.UriSchemeHttps) {
404 if (!reused || nstream == null || tlsStream == null) {
405 byte [] buffer = null;
406 if (sPoint.UseConnect) {
407 bool ok = CreateTunnel (request, sPoint.Address, serverStream, out buffer);
411 tlsStream = new MonoTlsStream (request, serverStream);
412 nstream = tlsStream.CreateStream (buffer);
414 // we also need to set ServicePoint.Certificate
415 // and ServicePoint.ClientCertificate but this can
416 // only be done later (after handshake - which is
417 // done only after a read operation).
419 throw new NotSupportedException ();
422 nstream = serverStream;
424 } catch (Exception ex) {
425 if (tlsStream != null)
426 status = tlsStream.ExceptionStatus;
427 else if (!request.Aborted)
428 status = WebExceptionStatus.ConnectFailure;
429 connect_exception = ex;
436 void HandleError (WebExceptionStatus st, Exception e, string where)
440 if (st == WebExceptionStatus.RequestCanceled)
441 Data = new WebConnectionData ();
444 if (e == null) { // At least we now where it comes from
446 throw new Exception (new System.Diagnostics.StackTrace ().ToString ());
447 } catch (Exception e2) {
452 HttpWebRequest req = null;
453 if (Data != null && Data.request != null)
458 req.FinishedReading = true;
459 req.SetResponseError (st, e, where);
463 static void ReadDone (IAsyncResult result)
465 WebConnection cnc = (WebConnection)result.AsyncState;
466 WebConnectionData data = cnc.Data;
467 Stream ns = cnc.nstream;
475 nread = ns.EndRead (result);
476 } catch (ObjectDisposedException) {
478 } catch (Exception e) {
479 if (e.InnerException is ObjectDisposedException)
482 cnc.HandleError (WebExceptionStatus.ReceiveFailure, e, "ReadDone1");
487 cnc.HandleError (WebExceptionStatus.ReceiveFailure, null, "ReadDone2");
492 cnc.HandleError (WebExceptionStatus.ServerProtocolViolation, null, "ReadDone3");
497 nread += cnc.position;
498 if (data.ReadState == ReadState.None) {
499 Exception exc = null;
501 pos = GetResponse (data, cnc.sPoint, cnc.buffer, nread);
502 } catch (Exception e) {
506 if (exc != null || pos == -1) {
507 cnc.HandleError (WebExceptionStatus.ServerProtocolViolation, exc, "ReadDone4");
512 if (data.ReadState == ReadState.Aborted) {
513 cnc.HandleError (WebExceptionStatus.RequestCanceled, null, "ReadDone");
517 if (data.ReadState != ReadState.Content) {
519 int max = (est < cnc.buffer.Length) ? cnc.buffer.Length : est;
520 byte [] newBuffer = new byte [max];
521 Buffer.BlockCopy (cnc.buffer, 0, newBuffer, 0, nread);
522 cnc.buffer = newBuffer;
523 cnc.position = nread;
524 data.ReadState = ReadState.None;
531 WebConnectionStream stream = new WebConnectionStream (cnc, data);
532 bool expect_content = ExpectContent (data.StatusCode, data.request.Method);
533 string tencoding = null;
535 tencoding = data.Headers ["Transfer-Encoding"];
537 cnc.chunkedRead = (tencoding != null && tencoding.IndexOf ("chunked", StringComparison.OrdinalIgnoreCase) != -1);
538 if (!cnc.chunkedRead) {
539 stream.ReadBuffer = cnc.buffer;
540 stream.ReadBufferOffset = pos;
541 stream.ReadBufferSize = nread;
543 stream.CheckResponseInBuffer ();
544 } catch (Exception e) {
545 cnc.HandleError (WebExceptionStatus.ReceiveFailure, e, "ReadDone7");
547 } else if (cnc.chunkStream == null) {
549 cnc.chunkStream = new ChunkStream (cnc.buffer, pos, nread, data.Headers);
550 } catch (Exception e) {
551 cnc.HandleError (WebExceptionStatus.ServerProtocolViolation, e, "ReadDone5");
555 cnc.chunkStream.ResetBuffer ();
557 cnc.chunkStream.Write (cnc.buffer, pos, nread);
558 } catch (Exception e) {
559 cnc.HandleError (WebExceptionStatus.ServerProtocolViolation, e, "ReadDone6");
564 data.stream = stream;
567 stream.ForceCompletion ();
569 data.request.SetResponseData (data);
572 static bool ExpectContent (int statusCode, string method)
574 if (method == "HEAD")
576 return (statusCode >= 200 && statusCode != 204 && statusCode != 304);
579 internal static void InitRead (object state)
581 WebConnection cnc = (WebConnection) state;
582 Stream ns = cnc.nstream;
585 int size = cnc.buffer.Length - cnc.position;
586 ns.BeginRead (cnc.buffer, cnc.position, size, readDoneDelegate, cnc);
587 } catch (Exception e) {
588 cnc.HandleError (WebExceptionStatus.ReceiveFailure, e, "InitRead");
592 static int GetResponse (WebConnectionData data, ServicePoint sPoint,
593 byte [] buffer, int max)
598 bool isContinue = false;
599 bool emptyFirstLine = false;
601 if (data.ReadState == ReadState.Aborted)
604 if (data.ReadState == ReadState.None) {
605 lineok = ReadLine (buffer, ref pos, max, ref line);
610 emptyFirstLine = true;
613 emptyFirstLine = false;
614 data.ReadState = ReadState.Status;
616 string [] parts = line.Split (' ');
617 if (parts.Length < 2)
620 if (String.Compare (parts [0], "HTTP/1.1", true) == 0) {
621 data.Version = HttpVersion.Version11;
622 sPoint.SetVersion (HttpVersion.Version11);
624 data.Version = HttpVersion.Version10;
625 sPoint.SetVersion (HttpVersion.Version10);
628 data.StatusCode = (int) UInt32.Parse (parts [1]);
629 if (parts.Length >= 3)
630 data.StatusDescription = String.Join (" ", parts, 2, parts.Length - 2);
632 data.StatusDescription = "";
638 emptyFirstLine = false;
639 if (data.ReadState == ReadState.Status) {
640 data.ReadState = ReadState.Headers;
641 data.Headers = new WebHeaderCollection ();
642 ArrayList headers = new ArrayList ();
643 bool finished = false;
645 if (ReadLine (buffer, ref pos, max, ref line) == false)
649 // Empty line: end of headers
654 if (line.Length > 0 && (line [0] == ' ' || line [0] == '\t')) {
655 int count = headers.Count - 1;
659 string prev = (string) headers [count] + line;
660 headers [count] = prev;
669 // .NET uses ParseHeaders or ParseHeadersStrict which is much better
670 foreach (string s in headers) {
672 int pos_s = s.IndexOf (':');
674 throw new ArgumentException ("no colon found", "header");
676 var header = s.Substring (0, pos_s);
677 var value = s.Substring (pos_s + 1).Trim ();
679 var h = data.Headers;
680 if (WebHeaderCollection.AllowMultiValues (header)) {
681 h.AddInternal (header, value);
683 h.SetInternal (header, value);
687 if (data.StatusCode == (int) HttpStatusCode.Continue) {
688 sPoint.SendContinue = true;
692 if (data.request.ExpectContinue) {
693 data.request.DoContinueDelegate (data.StatusCode, data.Headers);
694 // Prevent double calls when getting the
695 // headers in several packets.
696 data.request.ExpectContinue = false;
699 data.ReadState = ReadState.None;
703 data.ReadState = ReadState.Content;
707 } while (emptyFirstLine || isContinue);
712 void InitConnection (object state)
714 HttpWebRequest request = (HttpWebRequest) state;
715 request.WebConnection = this;
716 if (request.ReuseConnection)
717 request.StoredConnection = this;
722 keepAlive = request.KeepAlive;
723 Data = new WebConnectionData (request);
729 if (status != WebExceptionStatus.Success) {
730 if (!request.Aborted) {
731 request.SetWriteStreamError (status, connect_exception);
737 if (!CreateStream (request)) {
741 WebExceptionStatus st = status;
742 if (Data.Challenge != null)
745 Exception cnc_exc = connect_exception;
746 if (cnc_exc == null && (Data.StatusCode == 401 || Data.StatusCode == 407)) {
747 st = WebExceptionStatus.ProtocolError;
748 if (Data.Headers == null)
749 Data.Headers = new WebHeaderCollection ();
751 var webResponse = new HttpWebResponse (sPoint.Address, "CONNECT", Data, null);
752 cnc_exc = new WebException (Data.StatusCode == 407 ? "(407) Proxy Authentication Required" : "(401) Unauthorized", null, st, webResponse);
755 connect_exception = null;
756 request.SetWriteStreamError (st, cnc_exc);
761 request.SetWriteStream (new WebConnectionStream (this, request));
765 static bool warned_about_queue = false;
768 internal EventHandler SendRequest (HttpWebRequest request)
774 if (state.TrySetBusy ()) {
775 status = WebExceptionStatus.Success;
776 ThreadPool.QueueUserWorkItem (initConn, request);
780 if (!warned_about_queue) {
781 warned_about_queue = true;
782 Console.WriteLine ("WARNING: An HttpWebRequest was added to the ConnectionGroup queue because the connection limit was reached.");
785 queue.Enqueue (request);
796 if (queue.Count > 0) {
797 SendRequest ((HttpWebRequest) queue.Dequeue ());
802 internal void NextRead ()
805 if (Data.request != null)
806 Data.request.FinishedReading = true;
807 string header = (sPoint.UsesProxy) ? "Proxy-Connection" : "Connection";
808 string cncHeader = (Data.Headers != null) ? Data.Headers [header] : null;
809 bool keepAlive = (Data.Version == HttpVersion.Version11 && this.keepAlive);
810 if (Data.ProxyVersion != null && Data.ProxyVersion != HttpVersion.Version11)
812 if (cncHeader != null) {
813 cncHeader = cncHeader.ToLower ();
814 keepAlive = (this.keepAlive && cncHeader.IndexOf ("keep-alive", StringComparison.Ordinal) != -1);
817 if ((socket != null && !socket.Connected) ||
818 (!keepAlive || (cncHeader != null && cncHeader.IndexOf ("close", StringComparison.Ordinal) != -1))) {
823 if (priority_request != null) {
824 SendRequest (priority_request);
825 priority_request = null;
832 static bool ReadLine (byte [] buffer, ref int start, int max, ref string output)
834 bool foundCR = false;
835 StringBuilder text = new StringBuilder ();
838 while (start < max) {
839 c = (int) buffer [start++];
841 if (c == '\n') { // newline
842 if ((text.Length > 0) && (text [text.Length - 1] == '\r'))
847 } else if (foundCR) {
856 text.Append ((char) c);
859 if (c != '\n' && c != '\r')
862 if (text.Length == 0) {
864 return (c == '\n' || c == '\r');
870 output = text.ToString ();
875 internal IAsyncResult BeginRead (HttpWebRequest request, byte [] buffer, int offset, int size, AsyncCallback cb, object state)
879 if (Data.request != request)
880 throw new ObjectDisposedException (typeof (NetworkStream).FullName);
886 IAsyncResult result = null;
887 if (!chunkedRead || (!chunkStream.DataAvailable && chunkStream.WantMore)) {
889 result = s.BeginRead (buffer, offset, size, cb, state);
891 } catch (Exception) {
892 HandleError (WebExceptionStatus.ReceiveFailure, null, "chunked BeginRead");
898 WebAsyncResult wr = new WebAsyncResult (cb, state, buffer, offset, size);
899 wr.InnerAsyncResult = result;
900 if (result == null) {
901 // Will be completed from the data in ChunkStream
902 wr.SetCompleted (true, (Exception) null);
911 internal int EndRead (HttpWebRequest request, IAsyncResult result)
916 throw new WebException ("Request aborted", WebExceptionStatus.RequestCanceled);
917 if (Data.request != request)
918 throw new ObjectDisposedException (typeof (NetworkStream).FullName);
920 throw new ObjectDisposedException (typeof (NetworkStream).FullName);
926 WebAsyncResult wr = null;
927 IAsyncResult nsAsync = ((WebAsyncResult) result).InnerAsyncResult;
928 if (chunkedRead && (nsAsync is WebAsyncResult)) {
929 wr = (WebAsyncResult) nsAsync;
930 IAsyncResult inner = wr.InnerAsyncResult;
931 if (inner != null && !(inner is WebAsyncResult)) {
932 nbytes = s.EndRead (inner);
935 } else if (!(nsAsync is WebAsyncResult)) {
936 nbytes = s.EndRead (nsAsync);
937 wr = (WebAsyncResult) result;
943 chunkStream.WriteAndReadBack (wr.Buffer, wr.Offset, wr.Size, ref nbytes);
944 if (!done && nbytes == 0 && chunkStream.WantMore)
945 nbytes = EnsureRead (wr.Buffer, wr.Offset, wr.Size);
946 } catch (Exception e) {
947 if (e is WebException)
950 throw new WebException ("Invalid chunked data.", e,
951 WebExceptionStatus.ServerProtocolViolation, null);
954 if ((done || nbytes == 0) && chunkStream.ChunkLeft != 0) {
955 HandleError (WebExceptionStatus.ReceiveFailure, null, "chunked EndRead");
956 throw new WebException ("Read error", null, WebExceptionStatus.ReceiveFailure, null);
960 return (nbytes != 0) ? nbytes : -1;
963 // To be called on chunkedRead when we can read no data from the ChunkStream yet
964 int EnsureRead (byte [] buffer, int offset, int size)
966 byte [] morebytes = null;
968 while (nbytes == 0 && chunkStream.WantMore) {
969 int localsize = chunkStream.ChunkLeft;
970 if (localsize <= 0) // not read chunk size yet
972 else if (localsize > 16384)
975 if (morebytes == null || morebytes.Length < localsize)
976 morebytes = new byte [localsize];
978 int nread = nstream.Read (morebytes, 0, localsize);
982 chunkStream.Write (morebytes, 0, nread);
983 nbytes += chunkStream.Read (buffer, offset + nbytes, size - nbytes);
989 bool CompleteChunkedRead()
991 if (!chunkedRead || chunkStream == null)
994 while (chunkStream.WantMore) {
995 int nbytes = nstream.Read (buffer, 0, buffer.Length);
997 return false; // Socket was disconnected
999 chunkStream.Write (buffer, 0, nbytes);
1005 internal IAsyncResult BeginWrite (HttpWebRequest request, byte [] buffer, int offset, int size, AsyncCallback cb, object state)
1009 if (Data.request != request)
1010 throw new ObjectDisposedException (typeof (NetworkStream).FullName);
1011 if (nstream == null)
1016 IAsyncResult result = null;
1018 result = s.BeginWrite (buffer, offset, size, cb, state);
1019 } catch (Exception) {
1020 status = WebExceptionStatus.SendFailure;
1027 internal bool EndWrite (HttpWebRequest request, bool throwOnError, IAsyncResult result)
1031 if (status == WebExceptionStatus.RequestCanceled)
1033 if (Data.request != request)
1034 throw new ObjectDisposedException (typeof (NetworkStream).FullName);
1035 if (nstream == null)
1036 throw new ObjectDisposedException (typeof (NetworkStream).FullName);
1041 s.EndWrite (result);
1043 } catch (Exception exc) {
1044 status = WebExceptionStatus.SendFailure;
1045 if (throwOnError && exc.InnerException != null)
1046 throw exc.InnerException;
1051 internal int Read (HttpWebRequest request, byte [] buffer, int offset, int size)
1055 if (Data.request != request)
1056 throw new ObjectDisposedException (typeof (NetworkStream).FullName);
1057 if (nstream == null)
1066 result = s.Read (buffer, offset, size);
1067 done = (result == 0);
1072 chunkStream.WriteAndReadBack (buffer, offset, size, ref result);
1073 if (!done && result == 0 && chunkStream.WantMore)
1074 result = EnsureRead (buffer, offset, size);
1075 } catch (Exception e) {
1076 HandleError (WebExceptionStatus.ReceiveFailure, e, "chunked Read1");
1080 if ((done || result == 0) && chunkStream.WantMore) {
1081 HandleError (WebExceptionStatus.ReceiveFailure, null, "chunked Read2");
1082 throw new WebException ("Read error", null, WebExceptionStatus.ReceiveFailure, null);
1085 } catch (Exception e) {
1086 HandleError (WebExceptionStatus.ReceiveFailure, e, "Read");
1092 internal bool Write (HttpWebRequest request, byte [] buffer, int offset, int size, ref string err_msg)
1097 if (Data.request != request)
1098 throw new ObjectDisposedException (typeof (NetworkStream).FullName);
1105 s.Write (buffer, offset, size);
1106 } catch (Exception e) {
1107 err_msg = e.Message;
1108 WebExceptionStatus wes = WebExceptionStatus.SendFailure;
1109 string msg = "Write: " + err_msg;
1110 if (e is WebException) {
1111 HandleError (wes, e, msg);
1115 HandleError (wes, e, msg);
1121 internal void Close (bool sendNext)
1124 if (Data != null && Data.request != null && Data.request.ReuseConnection) {
1125 Data.request.ReuseConnection = false;
1129 if (nstream != null) {
1136 if (socket != null) {
1143 if (ntlm_authenticated)
1147 Data.ReadState = ReadState.Aborted;
1151 Data = new WebConnectionData ();
1155 connect_request = null;
1156 connect_ntlm_auth_state = NtlmAuthState.None;
1160 void Abort (object sender, EventArgs args)
1164 HttpWebRequest req = (HttpWebRequest) sender;
1165 if (Data.request == req || Data.request == null) {
1166 if (!req.FinishedReading) {
1167 status = WebExceptionStatus.RequestCanceled;
1169 if (queue.Count > 0) {
1170 Data.request = (HttpWebRequest) queue.Dequeue ();
1171 SendRequest (Data.request);
1177 req.FinishedReading = true;
1178 req.SetResponseError (WebExceptionStatus.RequestCanceled, null, "User aborted");
1179 if (queue.Count > 0 && queue.Peek () == sender) {
1181 } else if (queue.Count > 0) {
1182 object [] old = queue.ToArray ();
1184 for (int i = old.Length - 1; i >= 0; i--) {
1185 if (old [i] != sender)
1186 queue.Enqueue (old [i]);
1193 internal void ResetNtlm ()
1195 ntlm_authenticated = false;
1196 ntlm_credentials = null;
1197 unsafe_sharing = false;
1200 internal bool Connected {
1203 return (socket != null && socket.Connected);
1208 // -Used for NTLM authentication
1209 internal HttpWebRequest PriorityRequest {
1210 set { priority_request = value; }
1213 internal bool NtlmAuthenticated {
1214 get { return ntlm_authenticated; }
1215 set { ntlm_authenticated = value; }
1218 internal NetworkCredential NtlmCredential {
1219 get { return ntlm_credentials; }
1220 set { ntlm_credentials = value; }
1223 internal bool UnsafeAuthenticatedConnectionSharing {
1224 get { return unsafe_sharing; }
1225 set { unsafe_sharing = value; }