319 lines
7.2 KiB
C#
319 lines
7.2 KiB
C#
#region License
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/*
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* RequestStream.cs
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*
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* This code is derived from RequestStream.cs (System.Net) of Mono
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* (http://www.mono-project.com).
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*
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* The MIT License
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*
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* Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
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* Copyright (c) 2012-2021 sta.blockhead
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#endregion
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#region Authors
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/*
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* Authors:
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* - Gonzalo Paniagua Javier <gonzalo@novell.com>
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*/
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#endregion
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using System;
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using System.IO;
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namespace WebSocketSharp.Net
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{
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internal class RequestStream : Stream
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{
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#region Private Fields
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private long _bodyLeft;
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private byte[] _buffer;
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private int _count;
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private bool _disposed;
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private int _offset;
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private Stream _stream;
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#endregion
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#region Internal Constructors
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internal RequestStream (
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Stream stream, byte[] buffer, int offset, int count, long contentLength
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)
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{
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_stream = stream;
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_buffer = buffer;
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_offset = offset;
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_count = count;
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_bodyLeft = contentLength;
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}
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#endregion
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#region Public Properties
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public override bool CanRead {
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get {
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return true;
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}
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}
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public override bool CanSeek {
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get {
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return false;
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}
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}
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public override bool CanWrite {
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get {
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return false;
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}
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}
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public override long Length {
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get {
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throw new NotSupportedException ();
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}
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}
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public override long Position {
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get {
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throw new NotSupportedException ();
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}
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set {
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throw new NotSupportedException ();
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}
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}
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#endregion
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#region Private Methods
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private int fillFromBuffer (byte[] buffer, int offset, int count)
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{
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// This method returns a int:
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// - > 0 The number of bytes read from the internal buffer
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// - 0 No more bytes read from the internal buffer
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// - -1 No more content data
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if (_bodyLeft == 0)
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return -1;
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if (_count == 0)
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return 0;
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if (count > _count)
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count = _count;
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if (_bodyLeft > 0 && _bodyLeft < count)
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count = (int) _bodyLeft;
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Buffer.BlockCopy (_buffer, _offset, buffer, offset, count);
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_offset += count;
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_count -= count;
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if (_bodyLeft > 0)
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_bodyLeft -= count;
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return count;
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}
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#endregion
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#region Public Methods
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public override IAsyncResult BeginRead (
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byte[] buffer, int offset, int count, AsyncCallback callback, object state
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)
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{
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if (_disposed) {
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var name = GetType ().ToString ();
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throw new ObjectDisposedException (name);
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}
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if (buffer == null)
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throw new ArgumentNullException ("buffer");
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if (offset < 0) {
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var msg = "A negative value.";
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throw new ArgumentOutOfRangeException ("offset", msg);
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}
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if (count < 0) {
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var msg = "A negative value.";
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throw new ArgumentOutOfRangeException ("count", msg);
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}
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var len = buffer.Length;
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if (offset + count > len) {
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var msg = "The sum of 'offset' and 'count' is greater than the length of 'buffer'.";
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throw new ArgumentException (msg);
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}
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if (count == 0)
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return _stream.BeginRead (buffer, offset, 0, callback, state);
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var nread = fillFromBuffer (buffer, offset, count);
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if (nread != 0) {
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var ares = new HttpStreamAsyncResult (callback, state);
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ares.Buffer = buffer;
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ares.Offset = offset;
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ares.Count = count;
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ares.SyncRead = nread > 0 ? nread : 0;
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ares.Complete ();
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return ares;
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}
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if (_bodyLeft >= 0 && _bodyLeft < count)
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count = (int) _bodyLeft;
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return _stream.BeginRead (buffer, offset, count, callback, state);
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}
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public override IAsyncResult BeginWrite (
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byte[] buffer, int offset, int count, AsyncCallback callback, object state
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)
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{
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throw new NotSupportedException ();
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}
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public override void Close ()
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{
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_disposed = true;
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}
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public override int EndRead (IAsyncResult asyncResult)
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{
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if (_disposed) {
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var name = GetType ().ToString ();
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throw new ObjectDisposedException (name);
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}
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if (asyncResult == null)
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throw new ArgumentNullException ("asyncResult");
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if (asyncResult is HttpStreamAsyncResult) {
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var ares = (HttpStreamAsyncResult) asyncResult;
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if (!ares.IsCompleted)
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ares.AsyncWaitHandle.WaitOne ();
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return ares.SyncRead;
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}
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var nread = _stream.EndRead (asyncResult);
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if (nread > 0 && _bodyLeft > 0)
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_bodyLeft -= nread;
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return nread;
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}
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public override void EndWrite (IAsyncResult asyncResult)
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{
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throw new NotSupportedException ();
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}
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public override void Flush ()
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{
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}
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public override int Read (byte[] buffer, int offset, int count)
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{
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if (_disposed) {
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var name = GetType ().ToString ();
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throw new ObjectDisposedException (name);
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}
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if (buffer == null)
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throw new ArgumentNullException ("buffer");
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if (offset < 0) {
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var msg = "A negative value.";
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throw new ArgumentOutOfRangeException ("offset", msg);
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}
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if (count < 0) {
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var msg = "A negative value.";
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throw new ArgumentOutOfRangeException ("count", msg);
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}
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var len = buffer.Length;
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if (offset + count > len) {
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var msg = "The sum of 'offset' and 'count' is greater than the length of 'buffer'.";
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throw new ArgumentException (msg);
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}
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if (count == 0)
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return 0;
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var nread = fillFromBuffer (buffer, offset, count);
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if (nread == -1)
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return 0;
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if (nread > 0)
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return nread;
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nread = _stream.Read (buffer, offset, count);
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if (nread > 0 && _bodyLeft > 0)
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_bodyLeft -= nread;
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return nread;
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}
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public override long Seek (long offset, SeekOrigin origin)
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{
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throw new NotSupportedException ();
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}
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public override void SetLength (long value)
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{
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throw new NotSupportedException ();
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}
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public override void Write (byte[] buffer, int offset, int count)
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{
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throw new NotSupportedException ();
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}
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#endregion
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}
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}
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