mcs/class/System.Runtime.Remoting/MonoHttp/RequestStream.cs

   1 #define EMBEDDED_IN_1_0
   2
   3 //
   4 // System.Net.RequestStream
   5 //
   6 // Author:
   7 //      Gonzalo Paniagua Javier (gonzalo@novell.com)
   8 //
   9 // Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
  10 //
  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:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  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.
  29 //
  30 #if EMBEDDED_IN_1_0
  31 using System.IO;
  32 using System.Net.Sockets;
  33 using System.Runtime.InteropServices;
  34 using System; using System.Net; namespace MonoHttp {
  35         class RequestStream : Stream
  36         {
  37                 byte [] buffer;
  38                 int offset;
  39                 int length;
  40                 long remaining_body;
  41                 bool disposed;
  42                 Stream stream;
  43
  44                 internal RequestStream (Stream stream, byte [] buffer, int offset, int length)
  45                         : this (stream, buffer, offset, length, -1)
  46                 {
  47                 }
  48
  49                 internal RequestStream (Stream stream, byte [] buffer, int offset, int length, long contentlength)
  50                 {
  51                         this.stream = stream;
  52                         this.buffer = buffer;
  53                         this.offset = offset;
  54                         this.length = length;
  55                         this.remaining_body = contentlength;
  56                 }
  57
  58                 public override bool CanRead {
  59                         get { return true; }
  60                 }
  61
  62                 public override bool CanSeek {
  63                         get { return false; }
  64                 }
  65
  66                 public override bool CanWrite {
  67                         get { return false; }
  68                 }
  69
  70                 public override long Length {
  71                         get { throw new NotSupportedException (); }
  72                 }
  73
  74                 public override long Position {
  75                         get { throw new NotSupportedException (); }
  76                         set { throw new NotSupportedException (); }
  77                 }
  78
  79
  80                 public override void Close ()
  81                 {
  82                         disposed = true;
  83                 }
  84
  85                 public override void Flush ()
  86                 {
  87                 }
  88
  89
  90                 // Returns 0 if we can keep reading from the base stream,
  91                 // > 0 if we read something from the buffer.
  92                 // -1 if we had a content length set and we finished reading that many bytes.
  93                 int FillFromBuffer (byte [] buffer, int off, int count)
  94                 {
  95                         if (buffer == null)
  96                                 throw new ArgumentNullException ("buffer");
  97                         if (off < 0)
  98                                 throw new ArgumentOutOfRangeException ("offset", "< 0");
  99                         if (count < 0)
 100                                 throw new ArgumentOutOfRangeException ("count", "< 0");
 101                         int len = buffer.Length;
 102                         if (off > len)
 103                                 throw new ArgumentException ("destination offset is beyond array size");
 104                         if (off > len - count)
 105                                 throw new ArgumentException ("Reading would overrun buffer");
 106
 107                         if (this.remaining_body == 0)
 108                                 return -1;
 109
 110                         if (this.length == 0)
 111                                 return 0;
 112
 113                         int size = Math.Min (this.length, count);
 114                         if (this.remaining_body > 0)
 115                                 size = (int) Math.Min (size, this.remaining_body);
 116
 117                         if (this.offset > this.buffer.Length - size) {
 118                                 size = Math.Min (size, this.buffer.Length - this.offset);
 119                         }
 120                         if (size == 0)
 121                                 return 0;
 122
 123                         Buffer.BlockCopy (this.buffer, this.offset, buffer, off, size);
 124                         this.offset += size;
 125                         this.length -= size;
 126                         if (this.remaining_body > 0)
 127                                 remaining_body -= size;
 128                         return size;
 129                 }
 130
 131                 public override int Read ([In,Out] byte[] buffer, int offset, int count)
 132                 {
 133                         if (disposed)
 134                                 throw new ObjectDisposedException (typeof (RequestStream).ToString ());
 135
 136                         // Call FillFromBuffer to check for buffer boundaries even when remaining_body is 0
 137                         int nread = FillFromBuffer (buffer, offset, count);
 138                         if (nread == -1) { // No more bytes available (Content-Length)
 139                                 return 0;
 140                         } else if (nread > 0) {
 141                                 return nread;
 142                         }
 143
 144                         nread = stream.Read (buffer, offset, count);
 145                         if (nread > 0 && remaining_body > 0)
 146                                 remaining_body -= nread;
 147                         return nread;
 148                 }
 149
 150                 public override IAsyncResult BeginRead (byte [] buffer, int offset, int count,
 151                                                         AsyncCallback cback, object state)
 152                 {
 153                         if (disposed)
 154                                 throw new ObjectDisposedException (typeof (RequestStream).ToString ());
 155
 156                         int nread = FillFromBuffer (buffer, offset, count);
 157                         if (nread > 0 || nread == -1) {
 158                                 HttpStreamAsyncResult ares = new HttpStreamAsyncResult ();
 159                                 ares.Buffer = buffer;
 160                                 ares.Offset = offset;
 161                                 ares.Count = count;
 162                                 ares.Callback = cback;
 163                                 ares.State = state;
 164                                 ares.SynchRead = nread;
 165                                 ares.Complete ();
 166                                 return ares;
 167                         }
 168
 169                         // Avoid reading past the end of the request to allow
 170                         // for HTTP pipelining
 171                         if (remaining_body >= 0 && count > remaining_body)
 172                                 count = (int) Math.Min (Int32.MaxValue, remaining_body);
 173                         return stream.BeginRead (buffer, offset, count, cback, state);
 174                 }
 175
 176                 public override int EndRead (IAsyncResult ares)
 177                 {
 178                         if (disposed)
 179                                 throw new ObjectDisposedException (typeof (RequestStream).ToString ());
 180
 181                         if (ares == null)
 182                                 throw new ArgumentNullException ("async_result");
 183
 184                         if (ares is HttpStreamAsyncResult) {
 185                                 HttpStreamAsyncResult r = (HttpStreamAsyncResult) ares;
 186                                 if (!ares.IsCompleted)
 187                                         ares.AsyncWaitHandle.WaitOne ();
 188                                 return r.SynchRead;
 189                         }
 190
 191                         // Close on exception?
 192                         int nread = stream.EndRead (ares);
 193                         if (remaining_body > 0 && nread > 0)
 194                                 remaining_body -= nread;
 195                         return nread;
 196                 }
 197
 198                 public override long Seek (long offset, SeekOrigin origin)
 199                 {
 200                         throw new NotSupportedException ();
 201                 }
 202
 203                 public override void SetLength (long value)
 204                 {
 205                         throw new NotSupportedException ();
 206                 }
 207
 208                 public override void Write (byte[] buffer, int offset, int count)
 209                 {
 210                         throw new NotSupportedException ();
 211                 }
 212
 213                 public override IAsyncResult BeginWrite (byte [] buffer, int offset, int count,
 214                                                         AsyncCallback cback, object state)
 215                 {
 216                         throw new NotSupportedException ();
 217                 }
 218
 219                 public override void EndWrite (IAsyncResult async_result)
 220                 {
 221                         throw new NotSupportedException ();
 222                 }
 223         }
 224 }
 225 #endif
 226