2 // System.Net.RequestStream
5 // Gonzalo Paniagua Javier (gonzalo@novell.com)
7 // Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 using System.Net.Sockets;
31 using System.Runtime.InteropServices;
32 namespace System.Net {
33 class RequestStream : Stream
42 internal RequestStream (Stream stream, byte [] buffer, int offset, int length)
43 : this (stream, buffer, offset, length, -1)
47 internal RequestStream (Stream stream, byte [] buffer, int offset, int length, long contentlength)
53 this.remaining_body = contentlength;
56 public override bool CanRead {
60 public override bool CanSeek {
64 public override bool CanWrite {
68 public override long Length {
69 get { throw new NotSupportedException (); }
72 public override long Position {
73 get { throw new NotSupportedException (); }
74 set { throw new NotSupportedException (); }
78 public override void Close ()
83 public override void Flush ()
88 // Returns 0 if we can keep reading from the base stream,
89 // > 0 if we read something from the buffer.
90 // -1 if we had a content length set and we finished reading that many bytes.
91 int FillFromBuffer (byte [] buffer, int off, int count)
94 throw new ArgumentNullException ("buffer");
96 throw new ArgumentOutOfRangeException ("offset", "< 0");
98 throw new ArgumentOutOfRangeException ("count", "< 0");
99 int len = buffer.Length;
101 throw new ArgumentException ("destination offset is beyond array size");
102 if (off > len - count)
103 throw new ArgumentException ("Reading would overrun buffer");
105 if (this.remaining_body == 0)
108 if (this.length == 0)
111 int size = Math.Min (this.length, count);
112 if (this.remaining_body > 0)
113 size = (int) Math.Min (size, this.remaining_body);
115 if (this.offset > this.buffer.Length - size) {
116 size = Math.Min (size, this.buffer.Length - this.offset);
121 Buffer.BlockCopy (this.buffer, this.offset, buffer, off, size);
124 if (this.remaining_body > 0)
125 remaining_body -= size;
129 public override int Read ([In,Out] byte[] buffer, int offset, int count)
132 throw new ObjectDisposedException (typeof (RequestStream).ToString ());
134 // Call FillFromBuffer to check for buffer boundaries even when remaining_body is 0
135 int nread = FillFromBuffer (buffer, offset, count);
136 if (nread == -1) { // No more bytes available (Content-Length)
138 } else if (nread > 0) {
142 nread = stream.Read (buffer, offset, count);
143 if (nread > 0 && remaining_body > 0)
144 remaining_body -= nread;
148 public override IAsyncResult BeginRead (byte [] buffer, int offset, int count,
149 AsyncCallback cback, object state)
152 throw new ObjectDisposedException (typeof (RequestStream).ToString ());
154 int nread = FillFromBuffer (buffer, offset, count);
155 if (nread > 0 || nread == -1) {
156 HttpStreamAsyncResult ares = new HttpStreamAsyncResult ();
157 ares.Buffer = buffer;
158 ares.Offset = offset;
160 ares.Callback = cback;
162 ares.SynchRead = nread;
167 // Avoid reading past the end of the request to allow
168 // for HTTP pipelining
169 if (remaining_body >= 0 && count > remaining_body)
170 count = (int) Math.Min (Int32.MaxValue, remaining_body);
171 return stream.BeginRead (buffer, offset, count, cback, state);
174 public override int EndRead (IAsyncResult ares)
177 throw new ObjectDisposedException (typeof (RequestStream).ToString ());
180 throw new ArgumentNullException ("async_result");
182 if (ares is HttpStreamAsyncResult) {
183 HttpStreamAsyncResult r = (HttpStreamAsyncResult) ares;
184 if (!ares.IsCompleted)
185 ares.AsyncWaitHandle.WaitOne ();
189 // Close on exception?
190 int nread = stream.EndRead (ares);
191 if (remaining_body > 0 && nread > 0)
192 remaining_body -= nread;
196 public override long Seek (long offset, SeekOrigin origin)
198 throw new NotSupportedException ();
201 public override void SetLength (long value)
203 throw new NotSupportedException ();
206 public override void Write (byte[] buffer, int offset, int count)
208 throw new NotSupportedException ();
211 public override IAsyncResult BeginWrite (byte [] buffer, int offset, int count,
212 AsyncCallback cback, object state)
214 throw new NotSupportedException ();
217 public override void EndWrite (IAsyncResult async_result)
219 throw new NotSupportedException ();