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POHttpClient.SendAsync HttpException: The Client Disconnected
 

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  1. POHttpClient.SendAsync HttpException: The Client Disconnected
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    <p>I have an ASP.NET web API application hosted in a Windows Azure Web Role. The purpose of this application is to proxy Http Requests to other web enabled endpoints - such as a Service Bus Relay and return their response.</p> <p>On occasion our application throws an exception when sending a request with a significant (>5MB) payload. This might happen 1 in 20 requests with a large payload.</p> <blockquote> <p>Exception Details: System.AggregateException: One or more errors occurred. ---> System.Web.HttpException: The client disconnected.<br> at System.Web.Hosting.IIS7WorkerRequest.EndRead(IAsyncResult asyncResult) at System.Web.HttpBufferlessInputStream.EndRead(IAsyncResult asyncResult) at System.Net.Http.StreamToStreamCopy.BufferReadCallback(IAsyncResult ar) --- End of inner exception stack trace --- ---> (Inner Exception #0) System.Web.HttpException (0x800703E3): The client disconnected. at System.Web.Hosting.IIS7WorkerRequest.EndRead(IAsyncResult asyncResult) at System.Web.HttpBufferlessInputStream.EndRead(IAsyncResult asyncResult) at System.Net.Http.StreamToStreamCopy.BufferReadCallback(IAsyncResult ar)&lt;--- ; TraceSource 'w3wp.exe' event</p> </blockquote> <p>We send these Http Requests using the System.Net.HttpClient in .NET 4.5.</p> <pre><code>public class ProxyController : ApiController { private static readonly HttpClient HttpClient = new HttpClient(); private static readonly Uri BaseUri = new Uri("http://webendpoint.com"); public HttpResponseMessage Post() { var newUri = new Uri(BaseUri, Request.RequestUri.PathAndQuery); var request = new HttpRequestMessage(HttpMethod.Post, newUri) { Content = this.Request.Content }; var task = HttpClient.SendAsync(request, HttpCompletionOption.ResponseHeadersRead); task.Wait(); var response = task.Result; return new HttpResponseMessage(response.StatusCode) { Content = new PushStreamContent((stream, content, ctx) =&gt; { var tempStream = response.Content.ReadAsStreamAsync().Result; tempStream.CopyToAsync(stream).Wait(); stream.Flush(); stream.Close(); }) }; } } </code></pre> <p>Any thoughts on what could be causing this problem?</p>
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    1. USGavin Osborn
    1. USGavin Osborn
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      1. VTUpMod
    1. COIt's hard to help you debug that code as you must have written it from memory because it is full of errors. However, the first thing I would recommend if you truly are creating just a proxy is to just use a DelegatingHandler and don't bother with an ApiController.
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      1. POHttpClient.SendAsync HttpException: The Client Disconnected
      1. USDarrel Miller
    2. COFair point, I wasn't doing you any favours with that code. My Bad. Updated.
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      1. POHttpClient.SendAsync HttpException: The Client Disconnected
      1. USGavin Osborn
 

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