Hi,
On Wed, Jun 27, 2012 at 4:42 PM, rwittev1 <[email protected]> wrote:
> We're sometimes getting a timeout on a HttpWebRequest response. Some data
> is
> received, but not all, resulting in an exception in
> WebConnectionStream.Read()
> The request is over SSL and the response is using chunked transfer
> encoding.
> Bypassing one of these 2 (i.e. chunked over http or non-chunked over https)
> solves the problem for this specific instance. As we only have this problem
> with a very few requests, there is no way to be certain that this solves
> the
> actual problem or only circumvents our only reproducible case.
> However, I might have found a cause in WebConnection.BeginRead() an was
> wondering if anyone can confirm this:
>
> Here is a (simplified) part of WebConnection.BeginRead():
> 1. if (!chunkedRead || (!chunkStream.DataAvailable &&
> chunkStream.WantMore))
> {
> 2. result = nstream.BeginRead (buffer, offset, size, cb,
> state);
> 3. cb = null;
> 4. }
> 5.
> 6. if (chunkedRead) {
> 7. WebAsyncResult wr = new WebAsyncResult (cb, state, buffer,
> offset,
> size);
> 8. wr.InnerAsyncResult = result;
> 9. ...
> 10. return wr;
> 11. }
>
> When chunkStream has only read a part of a chunk, then the 2nd part of line
> 1 will be true. However, line 2 directly reads from the HttpsClientStream
> to
> the buffer. And so, bypassing data which is still in the chunkedStream.
>
I suggest you file a bug with this information. This code was recently
changed to fix another bug, so it might be that something else regressed.
Rolf
>
>
> Robin
>
> Monotouch: 5.2.12
>
> --
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