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POLarge WCF web service request failing with (400) HTTP Bad Request
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  1. POLarge WCF web service request failing with (400) HTTP Bad Request
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    copied!<p>I've encountered this apparently common problem and have been unable to resolve it.</p> <p><strong>If I call my WCF web service with a relatively small number of items in an array parameter (I've tested up to 50), everything is fine.</strong></p> <p><strong>However if I call the web service with 500 items, I get the Bad Request error.</strong></p> <p>Interestingly, I've run <a href="http://www.wireshark.org/" rel="nofollow noreferrer">Wireshark</a> on the server and it appears that the request isn't even hitting the server - the 400 error is being generated on the client side.</p> <p><strong>The exception is:</strong></p> <pre><code>System.ServiceModel.ProtocolException: The remote server returned an unexpected response: (400) Bad Request. ---&gt; System.Net.WebException: The remote server returned an error: (400) Bad Request. </code></pre> <p><strong>The <code>system.serviceModel</code> section of my client config file is:</strong></p> <pre><code>&lt;system.serviceModel&gt; &lt;bindings&gt; &lt;wsHttpBinding&gt; &lt;binding name="WSHttpBinding_IMyService" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard" maxBufferPoolSize="524288" maxReceivedMessageSize="2147483647" messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true" allowCookies="false"&gt; &lt;readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="2147483647" maxBytesPerRead="4096" maxNameTableCharCount="16384" /&gt; &lt;reliableSession ordered="true" inactivityTimeout="00:10:00" enabled="false" /&gt; &lt;security mode="None"&gt; &lt;transport clientCredentialType="Windows" proxyCredentialType="None" realm="" /&gt; &lt;message clientCredentialType="Windows" negotiateServiceCredential="true" establishSecurityContext="true" /&gt; &lt;/security&gt; &lt;/binding&gt; &lt;/wsHttpBinding&gt; &lt;/bindings&gt; &lt;client&gt; &lt;endpoint address="http://serviceserver/MyService.svc" binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_IMyService" contract="SmsSendingService.IMyService" name="WSHttpBinding_IMyService" /&gt; &lt;/client&gt; &lt;/system.serviceModel&gt; </code></pre> <p><strong>On the server side, my web.config file has the following <code>system.serviceModel</code> section:</strong></p> <pre><code>&lt;system.serviceModel&gt; &lt;services&gt; &lt;service name="MyService.MyService" behaviorConfiguration="MyService.MyServiceBehaviour" &gt; &lt;endpoint address="" binding="wsHttpBinding" bindingConfiguration="MyService.MyServiceBinding" contract="MyService.IMyService"&gt; &lt;/endpoint&gt; &lt;endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/&gt; &lt;/service&gt; &lt;/services&gt; &lt;bindings&gt; &lt;wsHttpBinding&gt; &lt;binding name="MyService.MyServiceBinding"&gt; &lt;security mode="None"&gt;&lt;/security&gt; &lt;/binding&gt; &lt;/wsHttpBinding&gt; &lt;/bindings&gt; &lt;behaviors&gt; &lt;serviceBehaviors&gt; &lt;behavior name="MyService.MyServiceBehaviour"&gt; &lt;!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment --&gt; &lt;serviceMetadata httpGetEnabled="true"/&gt; &lt;!-- To receive exception details in faults for debugging purposes, set the value below to true. Set to false before deployment to avoid disclosing exception information --&gt; &lt;serviceDebug includeExceptionDetailInFaults="true"/&gt; &lt;/behavior&gt; &lt;/serviceBehaviors&gt; &lt;/behaviors&gt; &lt;/system.serviceModel&gt; </code></pre> <p>I've <a href="https://stackoverflow.com/questions/740039/c-wcf-wcf-service-returning-a-404-bad-request-when-sending-an-array-of-items">looked at</a> a <a href="https://stackoverflow.com/questions/323551/http-bad-request-error-when-requesting-a-wcf-service-contract">fairly large</a> <a href="http://rajaramtechtalk.wordpress.com/2008/05/29/systemservicemodelprotocolexception-the-remote-server-returned-an-unexpected-response-400-bad-request/" rel="nofollow noreferrer">number</a> of <a href="http://www.stonejunction.com/post/2008/12/01/WCF-Call-gives-400-Bad-Request-response.aspx" rel="nofollow noreferrer">answers</a> to <a href="http://www.experts-exchange.com/Programming/Languages/.NET/Web_Services/Q_24002313.html" rel="nofollow noreferrer">this question</a> with <a href="http://joewirtley.blogspot.com/2007/08/maximum-string-content-length-and.html" rel="nofollow noreferrer">no success</a>.</p> <p>Can anyone help me with this?</p>
 

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