lib/csharp/src/Transport/THttpClient.cs - common/thrift - Gitiles

 /**
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements. See the NOTICE file
  * distributed with this work for additional information
  * regarding copyright ownership. The ASF licenses this file
  * to you under the Apache License, Version 2.0 (the
  * "License"); you may not use this file except in compliance
  * with the License. You may obtain a copy of the License at
  *
  *	 http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing,
  * software distributed under the License is distributed on an
  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  * KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations
  * under the License.
  *
  *
  */

 using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Net;
 using System.Threading;

 namespace Thrift.Transport
 {
 	public class THttpClient : TTransport, IDisposable
 	{
 		private readonly Uri uri;
 		private Stream inputStream;
 		private MemoryStream outputStream = new MemoryStream();

         // Timeouts in milliseconds
         private int connectTimeout = 30000;

         private int readTimeout = 30000;

 		private IDictionary<String, String> customHeaders = new Dictionary<string, string>();

         private HttpWebRequest connection = null;
 #if !SILVERLIGHT
         private IWebProxy proxy = WebRequest.DefaultWebProxy;
 #endif

         public THttpClient(Uri u)
 		{
 			uri = u;
             connection = CreateRequest();
 		}

 		public int ConnectTimeout
 		{
 			set
 			{
 			   connectTimeout = value;
 			}
 		}

 		public int ReadTimeout
 		{
 			set
 			{
 				readTimeout = value;
 			}
 		}

 		public IDictionary<String, String> CustomHeaders
 		{
 			get
 			{
 				return customHeaders;
 			}
 		}

 #if !SILVERLIGHT
         public IWebProxy Proxy
         {
             set
             {
                 proxy = value;
             }
         }
 #endif

 		public override bool IsOpen
 		{
 			get
 			{
 				return true;
 			}
 		}

 		public override void Open()
 		{
 		}

 		public override void Close()
 		{
 			if (inputStream != null)
 			{
 				inputStream.Close();
 				inputStream = null;
 			}
 			if (outputStream != null)
 			{
 				outputStream.Close();
 				outputStream = null;
 			}
 		}

 		public override int Read(byte[] buf, int off, int len)
 		{
 			if (inputStream == null)
 			{
 				throw new TTransportException(TTransportException.ExceptionType.NotOpen, "No request has been sent");
 			}

 			try
 			{
 				int ret = inputStream.Read(buf, off, len);

 				if (ret == -1)
 				{
 					throw new TTransportException(TTransportException.ExceptionType.EndOfFile, "No more data available");
 				}

 				return ret;
 			}
 			catch (IOException iox)
 			{
 				throw new TTransportException(TTransportException.ExceptionType.Unknown, iox.ToString());
 			}
 		}

 		public override void Write(byte[] buf, int off, int len)
 		{
 			outputStream.Write(buf, off, len);
 		}

 #if !SILVERLIGHT
 		public override void Flush()
 		{
 			try
 			{
 				SendRequest();
 			}
 			finally
 			{
 				outputStream = new MemoryStream();
 			}
 		}

 		private void SendRequest()
 		{
 			try
 			{
 				HttpWebRequest connection = CreateRequest();

 				byte[] data = outputStream.ToArray();
 				connection.ContentLength = data.Length;

 				using (Stream requestStream = connection.GetRequestStream())
 				{
 					requestStream.Write(data, 0, data.Length);
 					inputStream = connection.GetResponse().GetResponseStream();
 				}
 			}
 			catch (IOException iox)
 			{
 				throw new TTransportException(TTransportException.ExceptionType.Unknown, iox.ToString());
 			}
 			catch (WebException wx)
 			{
 				throw new TTransportException(TTransportException.ExceptionType.Unknown, "Couldn't connect to server: " + wx);
 			}
 		}
 #endif
 				private HttpWebRequest CreateRequest()
 		{
 			HttpWebRequest connection = (HttpWebRequest)WebRequest.Create(uri);

 #if !SILVERLIGHT
 			if (connectTimeout > 0)
 			{
 				connection.Timeout = connectTimeout;
 			}
 			if (readTimeout > 0)
 			{
 				connection.ReadWriteTimeout = readTimeout;
 			}
 #endif
 			// Make the request
 			connection.ContentType = "application/x-thrift";
 			connection.Accept = "application/x-thrift";
 			connection.UserAgent = "C#/THttpClient";
 			connection.Method = "POST";
 #if !SILVERLIGHT
 			connection.ProtocolVersion = HttpVersion.Version10;
 #endif

             //add custom headers here
 			foreach (KeyValuePair<string, string> item in customHeaders)
 			{
 #if !SILVERLIGHT
 				connection.Headers.Add(item.Key, item.Value);
 #else
                 connection.Headers[item.Key] = item.Value;
 #endif
 			}

 #if !SILVERLIGHT
             connection.Proxy = proxy;
 #endif

             return connection;
 		}

 #if SILVERLIGHT
         public override IAsyncResult BeginFlush(AsyncCallback callback, object state)
         {
             // Extract request and reset buffer
             var data = outputStream.ToArray();

             //requestBuffer_ = new MemoryStream();

             try
             {
                 // Create connection object
                 var flushAsyncResult = new FlushAsyncResult(callback, state);
                 flushAsyncResult.Connection = CreateRequest();

                 flushAsyncResult.Data = data;


                 flushAsyncResult.Connection.BeginGetRequestStream(GetRequestStreamCallback, flushAsyncResult);
                 return flushAsyncResult;

             }
             catch (IOException iox)
             {
                 throw new TTransportException(iox.ToString());
             }
         }

         public override void EndFlush(IAsyncResult asyncResult)
         {
             try
             {
                 var flushAsyncResult = (FlushAsyncResult) asyncResult;

                 if (!flushAsyncResult.IsCompleted)
                 {
                     var waitHandle = flushAsyncResult.AsyncWaitHandle;
                     waitHandle.WaitOne();  // blocking INFINITEly
                     waitHandle.Close();
                 }

                 if (flushAsyncResult.AsyncException != null)
                 {
                     throw flushAsyncResult.AsyncException;
                 }
             } finally
             {
                 outputStream = new MemoryStream();
             }

         }


         private void GetRequestStreamCallback(IAsyncResult asynchronousResult)
         {
             var flushAsyncResult = (FlushAsyncResult)asynchronousResult.AsyncState;
             try
             {
                 var reqStream = flushAsyncResult.Connection.EndGetRequestStream(asynchronousResult);
                 reqStream.Write(flushAsyncResult.Data, 0, flushAsyncResult.Data.Length);
                 reqStream.Flush();
                 reqStream.Close();

                 // Start the asynchronous operation to get the response
                 flushAsyncResult.Connection.BeginGetResponse(GetResponseCallback, flushAsyncResult);
             }
             catch (Exception exception)
             {
                 flushAsyncResult.AsyncException = new TTransportException(exception.ToString());
                 flushAsyncResult.UpdateStatusToComplete();
                 flushAsyncResult.NotifyCallbackWhenAvailable();
             }
         }

         private void GetResponseCallback(IAsyncResult asynchronousResult)
         {
             var flushAsyncResult = (FlushAsyncResult)asynchronousResult.AsyncState;
             try
             {
                 inputStream = flushAsyncResult.Connection.EndGetResponse(asynchronousResult).GetResponseStream();
             }
             catch (Exception exception)
             {
                 flushAsyncResult.AsyncException = new TTransportException(exception.ToString());
             }
             flushAsyncResult.UpdateStatusToComplete();
             flushAsyncResult.NotifyCallbackWhenAvailable();
         }

         // Based on http://msmvps.com/blogs/luisabreu/archive/2009/06/15/multithreading-implementing-the-iasyncresult-interface.aspx
         class FlushAsyncResult : IAsyncResult
         {
             private volatile Boolean _isCompleted;
             private ManualResetEvent _evt;
             private readonly AsyncCallback _cbMethod;
             private readonly Object _state;

             public FlushAsyncResult(AsyncCallback cbMethod, Object state)
             {
                 _cbMethod = cbMethod;
                 _state = state;
             }

             internal byte[] Data { get; set; }
             internal HttpWebRequest Connection { get; set; }
             internal TTransportException AsyncException { get; set; }

             public object AsyncState
             {
                 get { return _state; }
             }
             public WaitHandle AsyncWaitHandle
             {
                 get { return GetEvtHandle(); }
             }
             public bool CompletedSynchronously
             {
                 get { return false; }
             }
             public bool IsCompleted
             {
                 get { return _isCompleted; }
             }
             private readonly Object _locker = new Object();
             private ManualResetEvent GetEvtHandle()
             {
                 lock (_locker)
                 {
                     if (_evt == null)
                     {
                         _evt = new ManualResetEvent(false);
                     }
                     if (_isCompleted)
                     {
                         _evt.Set();
                     }
                 }
                 return _evt;
             }
             internal void UpdateStatusToComplete()
             {
                 _isCompleted = true; //1. set _iscompleted to true
                 lock (_locker)
                 {
                     if (_evt != null)
                     {
                         _evt.Set(); //2. set the event, when it exists
                     }
                 }
             }

             internal void NotifyCallbackWhenAvailable()
             {
                 if (_cbMethod != null)
                 {
                     _cbMethod(this);
                 }
             }
         }

 #endif
 #region " IDisposable Support "
 		private bool _IsDisposed;

 		// IDisposable
 		protected override void Dispose(bool disposing)
 		{
 			if (!_IsDisposed)
 			{
 				if (disposing)
 				{
 					if (inputStream != null)
 						inputStream.Dispose();
 					if (outputStream != null)
 						outputStream.Dispose();
 				}
 			}
 			_IsDisposed = true;
 		}
 #endregion
 	}
 }
	/**
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file
	* to you under the Apache License, Version 2.0 (the
	* "License"); you may not use this file except in compliance
	* with the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing,
	* software distributed under the License is distributed on an
	* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	* KIND, either express or implied. See the License for the
	* specific language governing permissions and limitations
	* under the License.
	*
	*
	*/

	using System;
	using System.Collections.Generic;
	using System.IO;
	using System.Net;
	using System.Threading;

	namespace Thrift.Transport
	{
	public class THttpClient : TTransport, IDisposable
	{
	private readonly Uri uri;
	private Stream inputStream;
	private MemoryStream outputStream = new MemoryStream();

	// Timeouts in milliseconds
	private int connectTimeout = 30000;

	private int readTimeout = 30000;

	private IDictionary<String, String> customHeaders = new Dictionary<string, string>();

	private HttpWebRequest connection = null;
	#if !SILVERLIGHT
	private IWebProxy proxy = WebRequest.DefaultWebProxy;
	#endif

	public THttpClient(Uri u)
	{
	uri = u;
	connection = CreateRequest();
	}

	public int ConnectTimeout
	{
	set
	{
	connectTimeout = value;
	}
	}

	public int ReadTimeout
	{
	set
	{
	readTimeout = value;
	}
	}

	public IDictionary<String, String> CustomHeaders
	{
	get
	{
	return customHeaders;
	}
	}

	#if !SILVERLIGHT
	public IWebProxy Proxy
	{
	set
	{
	proxy = value;
	}
	}
	#endif

	public override bool IsOpen
	{
	get
	{
	return true;
	}
	}

	public override void Open()
	{
	}

	public override void Close()
	{
	if (inputStream != null)
	{
	inputStream.Close();
	inputStream = null;
	}
	if (outputStream != null)
	{
	outputStream.Close();
	outputStream = null;
	}
	}

	public override int Read(byte[] buf, int off, int len)
	{
	if (inputStream == null)
	{
	throw new TTransportException(TTransportException.ExceptionType.NotOpen, "No request has been sent");
	}

	try
	{
	int ret = inputStream.Read(buf, off, len);

	if (ret == -1)
	{
	throw new TTransportException(TTransportException.ExceptionType.EndOfFile, "No more data available");
	}

	return ret;
	}
	catch (IOException iox)
	{
	throw new TTransportException(TTransportException.ExceptionType.Unknown, iox.ToString());
	}
	}

	public override void Write(byte[] buf, int off, int len)
	{
	outputStream.Write(buf, off, len);
	}

	#if !SILVERLIGHT
	public override void Flush()
	{
	try
	{
	SendRequest();
	}
	finally
	{
	outputStream = new MemoryStream();
	}
	}

	private void SendRequest()
	{
	try
	{
	HttpWebRequest connection = CreateRequest();

	byte[] data = outputStream.ToArray();
	connection.ContentLength = data.Length;

	using (Stream requestStream = connection.GetRequestStream())
	{
	requestStream.Write(data, 0, data.Length);
	inputStream = connection.GetResponse().GetResponseStream();
	}
	}
	catch (IOException iox)
	{
	throw new TTransportException(TTransportException.ExceptionType.Unknown, iox.ToString());
	}
	catch (WebException wx)
	{
	throw new TTransportException(TTransportException.ExceptionType.Unknown, "Couldn't connect to server: " + wx);
	}
	}
	#endif
	private HttpWebRequest CreateRequest()
	{
	HttpWebRequest connection = (HttpWebRequest)WebRequest.Create(uri);

	#if !SILVERLIGHT
	if (connectTimeout > 0)
	{
	connection.Timeout = connectTimeout;
	}
	if (readTimeout > 0)
	{
	connection.ReadWriteTimeout = readTimeout;
	}
	#endif
	// Make the request
	connection.ContentType = "application/x-thrift";
	connection.Accept = "application/x-thrift";
	connection.UserAgent = "C#/THttpClient";
	connection.Method = "POST";
	#if !SILVERLIGHT
	connection.ProtocolVersion = HttpVersion.Version10;
	#endif

	//add custom headers here
	foreach (KeyValuePair<string, string> item in customHeaders)
	{
	#if !SILVERLIGHT
	connection.Headers.Add(item.Key, item.Value);
	#else
	connection.Headers[item.Key] = item.Value;
	#endif
	}

	#if !SILVERLIGHT
	connection.Proxy = proxy;
	#endif

	return connection;
	}

	#if SILVERLIGHT
	public override IAsyncResult BeginFlush(AsyncCallback callback, object state)
	{
	// Extract request and reset buffer
	var data = outputStream.ToArray();

	//requestBuffer_ = new MemoryStream();

	try
	{
	// Create connection object
	var flushAsyncResult = new FlushAsyncResult(callback, state);
	flushAsyncResult.Connection = CreateRequest();

	flushAsyncResult.Data = data;


	flushAsyncResult.Connection.BeginGetRequestStream(GetRequestStreamCallback, flushAsyncResult);
	return flushAsyncResult;

	}
	catch (IOException iox)
	{
	throw new TTransportException(iox.ToString());
	}
	}

	public override void EndFlush(IAsyncResult asyncResult)
	{
	try
	{
	var flushAsyncResult = (FlushAsyncResult) asyncResult;

	if (!flushAsyncResult.IsCompleted)
	{
	var waitHandle = flushAsyncResult.AsyncWaitHandle;
	waitHandle.WaitOne(); // blocking INFINITEly
	waitHandle.Close();
	}

	if (flushAsyncResult.AsyncException != null)
	{
	throw flushAsyncResult.AsyncException;
	}
	} finally
	{
	outputStream = new MemoryStream();
	}

	}


	private void GetRequestStreamCallback(IAsyncResult asynchronousResult)
	{
	var flushAsyncResult = (FlushAsyncResult)asynchronousResult.AsyncState;
	try
	{
	var reqStream = flushAsyncResult.Connection.EndGetRequestStream(asynchronousResult);
	reqStream.Write(flushAsyncResult.Data, 0, flushAsyncResult.Data.Length);
	reqStream.Flush();
	reqStream.Close();

	// Start the asynchronous operation to get the response
	flushAsyncResult.Connection.BeginGetResponse(GetResponseCallback, flushAsyncResult);
	}
	catch (Exception exception)
	{
	flushAsyncResult.AsyncException = new TTransportException(exception.ToString());
	flushAsyncResult.UpdateStatusToComplete();
	flushAsyncResult.NotifyCallbackWhenAvailable();
	}
	}

	private void GetResponseCallback(IAsyncResult asynchronousResult)
	{
	var flushAsyncResult = (FlushAsyncResult)asynchronousResult.AsyncState;
	try
	{
	inputStream = flushAsyncResult.Connection.EndGetResponse(asynchronousResult).GetResponseStream();
	}
	catch (Exception exception)
	{
	flushAsyncResult.AsyncException = new TTransportException(exception.ToString());
	}
	flushAsyncResult.UpdateStatusToComplete();
	flushAsyncResult.NotifyCallbackWhenAvailable();
	}

	// Based on http://msmvps.com/blogs/luisabreu/archive/2009/06/15/multithreading-implementing-the-iasyncresult-interface.aspx
	class FlushAsyncResult : IAsyncResult
	{
	private volatile Boolean _isCompleted;
	private ManualResetEvent _evt;
	private readonly AsyncCallback _cbMethod;
	private readonly Object _state;

	public FlushAsyncResult(AsyncCallback cbMethod, Object state)
	{
	_cbMethod = cbMethod;
	_state = state;
	}

	internal byte[] Data { get; set; }
	internal HttpWebRequest Connection { get; set; }
	internal TTransportException AsyncException { get; set; }

	public object AsyncState
	{
	get { return _state; }
	}
	public WaitHandle AsyncWaitHandle
	{
	get { return GetEvtHandle(); }
	}
	public bool CompletedSynchronously
	{
	get { return false; }
	}
	public bool IsCompleted
	{
	get { return _isCompleted; }
	}
	private readonly Object _locker = new Object();
	private ManualResetEvent GetEvtHandle()
	{
	lock (_locker)
	{
	if (_evt == null)
	{
	_evt = new ManualResetEvent(false);
	}
	if (_isCompleted)
	{
	_evt.Set();
	}
	}
	return _evt;
	}
	internal void UpdateStatusToComplete()
	{
	_isCompleted = true; //1. set _iscompleted to true
	lock (_locker)
	{
	if (_evt != null)
	{
	_evt.Set(); //2. set the event, when it exists
	}
	}
	}

	internal void NotifyCallbackWhenAvailable()
	{
	if (_cbMethod != null)
	{
	_cbMethod(this);
	}
	}
	}

	#endif
	#region " IDisposable Support "
	private bool _IsDisposed;

	// IDisposable
	protected override void Dispose(bool disposing)
	{
	if (!_IsDisposed)
	{
	if (disposing)
	{
	if (inputStream != null)
	inputStream.Dispose();
	if (outputStream != null)
	outputStream.Dispose();
	}
	}
	_IsDisposed = true;
	}
	#endregion
	}
	}