[Mono-bugs] [Bug 508027] HttpWebRequest.BeginGetResponseStream throws ProtocolViolationException

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http://bugzilla.novell.com/show_bug.cgi?id=508027

User gert.driesen at pandora.be added comment
http://bugzilla.novell.com/show_bug.cgi?id=508027#c2


Gert Driesen <gert.driesen at pandora.be> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
                 CC|                            |gert.driesen at pandora.be
         Resolution|FIXED                       |




--- Comment #2 from Gert Driesen <gert.driesen at pandora.be>  2009-06-05 17:10:50 MDT ---
According to the MSDN doc page for HttpWebRequest.BeginGetResponse, a
ProtocolViolationException is thrown in the following conditions:

Method is GET or HEAD, and either ContentLength is greater than zero or
SendChunked is true.

-or- 

KeepAlive is true, AllowWriteStreamBuffering is false, and either ContentLength
is -1 or SendChunked is false, and Method is POST or PUT.


However, starting from .NET 2.0 that exception is no longer thrown in any of
these conditions.
I've filed a (documentation) bug report against MS for this:
https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=464686

To reproduce, compile and run the following code:

using System;
using System.Net;

class Program
{
  static void Main ()
  {
    Uri url  = new Uri ("http://www.microsoft.com");

    HttpWebRequest req = (HttpWebRequest) WebRequest.Create (url);
    req.Method = "POST";
    req.SendChunked = false;
    req.KeepAlive = true;
    req.AllowWriteStreamBuffering = false;
    try {
      req.BeginGetResponse (null, null);
    } catch (ProtocolViolationException ex) {
      Console.WriteLine (ex.ToString ());
      Console.WriteLine ();
    } finally {
      req.Abort ();
    }

    req = (HttpWebRequest) WebRequest.Create (url);
    req.Method = "GET";
    req.SendChunked = true;
    try {
      req.BeginGetResponse (null, null);
    } catch (ProtocolViolationException ex) {
      Console.WriteLine (ex.ToString ());
      Console.WriteLine ();
    } finally {
      req.Abort ();
    }

    req = (HttpWebRequest) WebRequest.Create (url);
    req.Method = "GET";
    req.ContentLength = 5;
    try {
      req.BeginGetResponse (null, null);
    } catch (ProtocolViolationException ex) {
      Console.WriteLine (ex.ToString ());
      Console.WriteLine ();
    } finally {
      req.Abort ();
    }
  }
}

Expected result:

1.0 profile / .NET 1.x:

Three ProtocolViolationExceptions are written to stdout.

2.0 profile (and higher):

Successful execution without output to stdout.

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