Bug 7637 - HttpWebRequest::BeginGetResponse hangs when send request stream is empty
Summary: HttpWebRequest::BeginGetResponse hangs when send request stream is empty
Alias: None
Product: Class Libraries
Classification: Mono
Component: System ()
Version: unspecified
Hardware: PC Mac OS
: --- normal
Target Milestone: Untriaged
Assignee: Martin Baulig
Depends on:
Reported: 2012-10-04 05:49 UTC by Marek Safar
Modified: 2012-10-29 10:55 UTC (History)
1 user (show)

Is this bug a regression?: ---
Last known good build:

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Description Marek Safar 2012-10-04 05:49:46 UTC
using System;
using System.IO;
using System.Net;

public class Bugged
	static void CB (IAsyncResult res)

	public static void Main ()
		var wr = HttpWebRequest.Create ("http://google.com");
		wr.Method = "POST";
		var stream = wr.GetRequestStream ();
		//str.WriteByte (0xAC); // Uncomment this to make it work

		var gr = wr.BeginGetResponse (CB, null);
		gr.AsyncWaitHandle.WaitOne ();
		Console.WriteLine ("end");
Comment 1 Marek Safar 2012-10-04 05:52:47 UTC
I did quite some digging when fixing other bug and the issue is most likely in how

		void CheckIfForceWrite ()

works. It seems to assume that when the stream was requested it will always be filled.
Comment 2 Martin Baulig 2012-10-26 19:20:22 UTC
Fixed; master 1ccb01e, mono-2-10 63506fa, mobile-master f0a2a4f
Comment 3 Martin Baulig 2012-10-29 10:55:31 UTC
This is a .NET 4.0 feature.  Fixed in 3a7a355 / 4025e28 / 2853ddd.