将文件字节流发送到WCF服务时，为什么会出现“ 401-未经授权”错误？

Question

I have a WCF service with a basicHttp binding hosted on II7 being called from a Silverlight client. I can call all of the services on the endpoint without issue except for one.

I'm trying to upload a file so the service receives a byte array. If I upload files over 3MB in size, I get the error below.

When I try calling this service:

[OperationContract]
public AuditResponse UploadVendorAuditFile( int vendorID, 
                                            int sourceSystemID, 
                                            string fileName,
                                            byte[] fileBytes )
{
    // stuff
}

I get the following error:

401 - Unauthorized: Access is denied due to invalid credentials. You do not have permission to view this directory or page using the credentials that you supplied.

Here are my configurations.

Endpoint Binding

<basicHttpBinding>
  <binding 
    name="basicHttpBindingConfiguration" 
    maxBufferSize="2147483647"
    maxBufferPoolSize="2147483647" 
    maxReceivedMessageSize="2147483647"
    >
    <readerQuotas 
    maxDepth="2147483647" 
    maxStringContentLength="2147483647"
    maxArrayLength="2147483647" 
    maxBytesPerRead="2147483647" 
    maxNameTableCharCount="2147483647" 
    />
    <security mode="TransportCredentialOnly">
    <transport clientCredentialType="Ntlm" proxyCredentialType="None" realm="" />
    </security>
  </binding>
</basicHttpBinding>

Service Configuration

<behaviors>
  <serviceBehaviors>
    <behavior name="">
      <serviceMetadata httpGetEnabled="true" />
      <serviceDebug includeExceptionDetailInFaults="true" />
      <dataContractSerializer maxItemsInObjectGraph="2147483647" />
    </behavior>
  </serviceBehaviors>
</behaviors>

Client

<system.serviceModel>
    <bindings>
        <basicHttpBinding>
            <binding 
              name="BasicHttpBinding_WMService" 
              maxBufferSize="2147483647"
              maxReceivedMessageSize="2147483647"
              >
                <security mode="TransportCredentialOnly" />
            </binding>
        </basicHttpBinding>
    </bindings>

Answer 1

Are the files for which it fails are bigger in size say greater than 1MB or so? Try enabling tracing to know the actual cause of the error.

If the files are of larger size then it might be cause of the reader quota settings which need to be set for larger values on both server and client side

Also consider adding the maxItemsInObjectGraph in your serviceBehaviour as shown

 <serviceBehaviors>        
    <behavior>
      <dataContractSerializer maxItemsInObjectGraph="2147483647" />
      <serviceMetadata httpGetEnabled="true" />
      <serviceDebug includeExceptionDetailInFaults="true" />
    </behavior>
  </serviceBehaviors>

NOTE: Make sure to have the same readerQuotas settings on both client and server side

Also try to set the below setting in your web.config

<system.web>  
     <httpRuntime maxRequestLength ="32768"/>
  </system.web>  

Answer 2

Make sure you are setting the max message size in your bindings on the WCF service..

For Example:

<binding name="xxx" maxBufferSize="2147483647" maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647">
  <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="50000000" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
</binding>