2 // System.Net.HttpConnection
5 // Gonzalo Paniagua Javier (gonzalo.mono@gmail.com)
7 // Copyright (c) 2005-2009 Novell, Inc. (http://www.novell.com)
8 // Copyright (c) 2012 Xamarin, Inc. (http://xamarin.com)
10 // Permission is hereby granted, free of charge, to any person obtaining
11 // a copy of this software and associated documentation files (the
12 // "Software"), to deal in the Software without restriction, including
13 // without limitation the rights to use, copy, modify, merge, publish,
14 // distribute, sublicense, and/or sell copies of the Software, and to
15 // permit persons to whom the Software is furnished to do so, subject to
16 // the following conditions:
18 // The above copyright notice and this permission notice shall be
19 // included in all copies or substantial portions of the Software.
21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
33 using Mono.Security.Protocol.Tls;
35 extern alias MonoSecurity;
36 using MonoSecurity::Mono.Security.Protocol.Tls;
40 using System.Net.Sockets;
41 using System.Reflection;
43 using System.Threading;
44 using System.Security.Cryptography;
45 using System.Security.Cryptography.X509Certificates;
47 namespace System.Net {
48 sealed class HttpConnection
50 static AsyncCallback onread_cb = new AsyncCallback (OnRead);
51 const int BufferSize = 8192;
57 HttpListenerContext context;
58 StringBuilder current_line;
59 ListenerPrefix prefix;
60 RequestStream i_stream;
61 ResponseStream o_stream;
66 AsymmetricAlgorithm key;
67 int s_timeout = 90000; // 90k ms for first request, 15k ms from then on
70 HttpListener last_listener;
71 int [] client_cert_errors;
72 X509Certificate2 client_cert;
74 public HttpConnection (Socket sock, EndPointListener epl, bool secure, X509Certificate2 cert, AsymmetricAlgorithm key)
80 if (secure == false) {
81 stream = new NetworkStream (sock, false);
83 SslServerStream ssl_stream = new SslServerStream (new NetworkStream (sock, false), cert, false, true, false);
84 ssl_stream.PrivateKeyCertSelectionDelegate += OnPVKSelection;
85 ssl_stream.ClientCertValidationDelegate += OnClientCertificateValidation;
88 timer = new Timer (OnTimeout, null, Timeout.Infinite, Timeout.Infinite);
92 internal int [] ClientCertificateErrors {
93 get { return client_cert_errors; }
96 internal X509Certificate2 ClientCertificate {
97 get { return client_cert; }
100 bool OnClientCertificateValidation (X509Certificate certificate, int[] errors)
102 if (certificate == null)
104 X509Certificate2 cert = certificate as X509Certificate2;
106 cert = new X509Certificate2 (certificate.GetRawCertData ());
108 client_cert_errors = errors;
112 AsymmetricAlgorithm OnPVKSelection (X509Certificate certificate, string targetHost)
119 context_bound = false;
124 ms = new MemoryStream ();
126 input_state = InputState.RequestLine;
127 line_state = LineState.None;
128 context = new HttpListenerContext (this);
131 public bool IsClosed {
132 get { return (sock == null); }
136 get { return reuses; }
139 public IPEndPoint LocalEndPoint {
141 if (local_ep != null)
144 local_ep = (IPEndPoint) sock.LocalEndPoint;
149 public IPEndPoint RemoteEndPoint {
150 get { return (IPEndPoint) sock.RemoteEndPoint; }
153 public bool IsSecure {
154 get { return secure; }
157 public ListenerPrefix Prefix {
158 get { return prefix; }
159 set { prefix = value; }
162 void OnTimeout (object unused)
168 public void BeginReadRequest ()
171 buffer = new byte [BufferSize];
175 timer.Change (s_timeout, Timeout.Infinite);
176 stream.BeginRead (buffer, 0, BufferSize, onread_cb, this);
178 timer.Change (Timeout.Infinite, Timeout.Infinite);
184 public RequestStream GetRequestStream (bool chunked, long contentlength)
186 if (i_stream == null) {
187 byte [] buffer = ms.GetBuffer ();
188 int length = (int) ms.Length;
192 context.Response.SendChunked = true;
193 i_stream = new ChunkedInputStream (context, stream, buffer, position, length - position);
195 i_stream = new RequestStream (stream, buffer, position, length - position, contentlength);
201 public ResponseStream GetResponseStream ()
203 // TODO: can we get this stream before reading the input?
204 if (o_stream == null) {
205 HttpListener listener = context.Listener;
206 bool ign = (listener == null) ? true : listener.IgnoreWriteExceptions;
207 o_stream = new ResponseStream (stream, context.Response, ign);
212 internal Stream Hijack ()
214 // TODO: disable normal request/response.
218 static void OnRead (IAsyncResult ares)
220 HttpConnection cnc = (HttpConnection) ares.AsyncState;
221 cnc.OnReadInternal (ares);
224 void OnReadInternal (IAsyncResult ares)
226 timer.Change (Timeout.Infinite, Timeout.Infinite);
229 nread = stream.EndRead (ares);
230 ms.Write (buffer, 0, nread);
231 if (ms.Length > 32768) {
232 SendError ("Bad request", 400);
237 if (ms != null && ms.Length > 0)
248 // SendError (); // Why bother?
254 if (ProcessInput (ms)) {
255 if (!context.HaveError)
256 context.Request.FinishInitialization ();
258 if (context.HaveError) {
264 if (!epl.BindContext (context)) {
265 SendError ("Invalid host", 400);
269 HttpListener listener = context.Listener;
270 if (last_listener != listener) {
272 listener.AddConnection (this);
273 last_listener = listener;
276 context_bound = true;
277 listener.RegisterContext (context);
280 stream.BeginRead (buffer, 0, BufferSize, onread_cb, this);
283 void RemoveConnection ()
285 if (last_listener == null)
286 epl.RemoveConnection (this);
288 last_listener.RemoveConnection (this);
302 InputState input_state = InputState.RequestLine;
303 LineState line_state = LineState.None;
306 // true -> done processing
307 // false -> need more input
308 bool ProcessInput (MemoryStream ms)
310 byte [] buffer = ms.GetBuffer ();
311 int len = (int) ms.Length;
316 line = ReadLine (buffer, position, len - position, ref used);
319 context.ErrorMessage = "Bad request";
320 context.ErrorStatus = 400;
328 if (input_state == InputState.RequestLine)
335 if (input_state == InputState.RequestLine) {
336 context.Request.SetRequestLine (line);
337 input_state = InputState.Headers;
340 context.Request.AddHeader (line);
341 } catch (Exception e) {
342 context.ErrorMessage = e.Message;
343 context.ErrorStatus = 400;
348 if (context.HaveError)
354 line = ReadLine (buffer, position, len - position, ref used);
357 context.ErrorMessage = "Bad request";
358 context.ErrorStatus = 400;
361 } while (line != null);
370 string ReadLine (byte [] buffer, int offset, int len, ref int used)
372 if (current_line == null)
373 current_line = new StringBuilder (128);
374 int last = offset + len;
376 for (int i = offset; i < last && line_state != LineState.LF; i++) {
380 line_state = LineState.CR;
381 } else if (b == 10) {
382 line_state = LineState.LF;
384 current_line.Append ((char) b);
388 string result = null;
389 if (line_state == LineState.LF) {
390 line_state = LineState.None;
391 result = current_line.ToString ();
392 current_line.Length = 0;
398 public void SendError (string msg, int status)
401 HttpListenerResponse response = context.Response;
402 response.StatusCode = status;
403 response.ContentType = "text/html";
404 string description = HttpListenerResponse.GetStatusDescription (status);
407 str = String.Format ("<h1>{0} ({1})</h1>", description, msg);
409 str = String.Format ("<h1>{0}</h1>", description);
411 byte [] error = context.Response.ContentEncoding.GetBytes (str);
412 response.Close (error, false);
414 // response was already closed
418 public void SendError ()
420 SendError (context.ErrorMessage, context.ErrorStatus);
426 epl.UnbindContext (context);
427 context_bound = false;
450 internal void Close (bool force_close)
453 Stream st = GetResponseStream ();
461 force_close |= !context.Request.KeepAlive;
463 force_close = (context.Response.Headers ["connection"] == "close");
466 // bool conn_close = (status_code == 400 || status_code == 408 || status_code == 411 ||
467 // status_code == 413 || status_code == 414 || status_code == 500 ||
468 // status_code == 503);
470 force_close |= (context.Request.ProtocolVersion <= HttpVersion.Version10);
474 if (!force_close && context.Request.FlushInput ()) {
475 if (chunked && context.Response.ForceCloseChunked == false) {
476 // Don't close. Keep working.
495 s.Shutdown (SocketShutdown.Both);