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最近,我遇到了 wcf 服务调用的问题,在消息的开头和结尾的消息中随机返回了 2 次标头。这是我通过提琴手看到的一个例子:

HTTP/1.1 200 OK
Cache-Control: private
Content-Type: text/xml; charset=utf-8
Vary: Accept-Encoding
Server: Microsoft-IIS/7.5
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Thu, 16 Feb 2012 15:48:22 GMT
Content-Length: 308

<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"><s:Body><Person_UpdateLastCSIDResponse/></s:Body></s:Envelope>HTTP/1.1 200 OK
Cache-Control: private
Content-Length: 126
Content-Type: text/xml; charset=utf-8
Server: Microsoft-IIS/7.5
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET

这并非一直发生,但似乎是随机发生的。它不仅仅发生在一个特定的服务调用中,而是可以在任何调用下发生。我还不能确定一个模式。

我们在 silverlight 应用程序中通过负载均衡器使用绑定类型 basicHttpBinding。

编辑:

我们有一个相当基本的配置:

服务端:

<system.serviceModel>
 <extensions>
  <behaviorExtensions>
    <add name="silverlightFaults" type="Website.Support.SilverlightFaultBehavior, Website" />
  </behaviorExtensions>
 </extensions>
 <behaviors>
  <serviceBehaviors>
   <behavior>
    <serviceMetadata httpGetEnabled="true" />
    <serviceDebug includeExceptionDetailInFaults="true" />
   </behavior>
  </serviceBehaviors>
 </behaviors>
 <serviceHostingEnvironment aspNetCompatibilityEnabled="true"
  multipleSiteBindingsEnabled="true" />
 <services>
  <service name="Website.Services.CommonService">
   <endpoint address="" behaviorConfiguration="SilverlightFaultBehavior"
    binding="basicHttpBinding" bindingConfiguration="MyDefaultBinding"
    contract="Website.Services.CommonService" />
   <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
  </service>
 <bindings>
  <basicHttpBinding>
   <binding name="MyDefaultBinding" maxBufferSize="6500000" maxReceivedMessageSize="6500000">
     <readerQuotas maxDepth="32" maxStringContentLength="52428800" maxArrayLength="52428800"
      maxBytesPerRead="4096" maxNameTableCharCount="52428800" />
   </binding>
  </basicHttpBinding>
 </bindings>
 <client />
</system.serviceModel>

客户端:

<system.serviceModel>
    <bindings>
        <basicHttpBinding>
            <binding name="SecureBinding" maxBufferSize="8388608" maxReceivedMessageSize="8388608">
                <security mode="Transport" />
            </binding>
        </basicHttpBinding>
    </bindings>

    <client>
      <endpoint address="https://Website/Services/CommonService.svc" binding="basicHttpBinding" bindingConfiguration="SecureBinding"
          contract="CommonSvcReference.CommonService" name="BasicHttpBinding_CommonService"/>
    </client>
</system.serviceModel>
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1 回答 1

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我相信我终于解决了我的问题。由于我们使用的是负载均衡器,因此您需要将 keep-alive 设置为 false。问题是 BasicHttpBinding 的 keep-alive 为真。切换到 customBinding 允许您关闭 keep-alive,这解决了问题。

作为一个扩展,将 keep-alive 设置为 false 会导致应用程序变慢。为了解决这个问题,我在http://blog.tonysneed.com/2012/06/18/building-scalable-and-secure-wcf-services/上使用了示例代码

于 2012-06-20T14:50:04.703 回答