Bug 7510 - Overloading HttpContent.SerializeToStreamAsync and using a StreamWriter doesn't behave properly.
Summary: Overloading HttpContent.SerializeToStreamAsync and using a StreamWriter doesn...
Alias: None
Product: Class Libraries
Classification: Mono
Component: System ()
Version: master
Hardware: PC Linux
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
Depends on:
Reported: 2012-09-27 13:19 UTC by Ivailo Karamanolev
Modified: 2012-10-04 06:53 UTC (History)
3 users (show)

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

Example demonstrating the hang. (1.20 KB, text/x-csharp)
2012-09-27 13:19 UTC, Ivailo Karamanolev

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Description Ivailo Karamanolev 2012-09-27 13:19:14 UTC
Created attachment 2640 [details]
Example demonstrating the hang.

When using HttpClient, in order to push data over the network you have to implement HttpContent and overload SerializeToStreamAsync. Inside the overload, if a StreamWriter is used and it is just flushed, everything works correctly. However, if the StreamWriter is disposed, even if it's set to leave the underlying stream open, the call never finishes. strace shows a connect() call and then a hang on wait (never send()s the data). Both of them work in MS.NET 4.5.

This doesn't work, but it should:
using (StreamWriter writer = new StreamWriter(stream, new UTF8Encoding(false), 4096, true))
    writer.WriteLine("hello world");

This works, but doesn't close the StreamWriter:
StreamWriter writer = new StreamWriter(stream);
writer.WriteLine("hello world");

Compiling the attached example is simple:
mcs -r:System.Net.Http Program.cs

The error happens when compiling both with mcs and Visual Studio 2012.
Comment 1 Marek Safar 2012-10-04 06:53:40 UTC
Fixed in master