WCF 服务调用返回空文件/页面

Question

问题： 当我调用已部署的 WCF 服务时，浏览器会下载一个空的 svc 文件，并且不会向我显示包含服务 xml 文件的页面。

上下文： 我必须将托管 WCF 服务的 webapp 移动到新服务器。该服务在运行 IIS 的旧服务器上运行良好。 新服务器有 2 个网络服务器正在运行。 IIS 8.5 和 WAMP 2.5，因为服务器托管了一个 Php 应用和 Jira。

设置： WAMP 服务器侦听 80 端口，然后根据需要重定向到 IIS 和特定端口。这是一个设置示例。

Wamp 配置（https-vhosts.confg）：

<VirtualHost *:80>    
ServerName site.de
ServerAlias www.site.de 
<Proxy *>
    Require all granted
</Proxy>

ProxyRequests           Off
ProxyPreserveHost       On
ProxyPass               /       http://localhost:9050/
ProxyPassReverse        /       http://localhost:9050/

服务网址： https://www.site.de/folder/service.svc

服务配置：

<system.serviceModel>
<bindings>
  <basicHttpBinding>
    <binding name="someBinding" maxReceivedMessageSize="2147483647" maxBufferSize="2147483647" maxBufferPoolSize="52428899">
      <readerQuotas maxDepth="64" maxStringContentLength="81920" maxArrayLength="163840" maxBytesPerRead="40960" maxNameTableCharCount="163840" />
      <security mode="Transport">
        <transport clientCredentialType="None" />
      </security>
    </binding>
  </basicHttpBinding>
</bindings>
<behaviors>

  <serviceBehaviors>
    <behavior name="LargeServiceBehavior">
      <serviceMetadata httpsGetEnabled="true" />
      <serviceDebug includeExceptionDetailInFaults="true" />
      <dataContractSerializer maxItemsInObjectGraph="2147483647" />
      <useRequestHeadersForMetadataAddress />
    </behavior>
  </serviceBehaviors>
</behaviors>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" aspNetCompatibilityEnabled="true" />

<services>
  <service name="ExampleServices.ExampleService" behaviorConfiguration="LargeServiceBehavior">
    <endpoint address="http://www.site.de/folder/service.svc" 
    binding="basicHttpBinding"
    bindingConfiguration="someBinding" 
    contract="ExampleServiceModels.IExampleService" />
  </service>
</services>

我以前从未使用过 wamp。而且我对 WCF 设置也没有太多经验。任何想法或提示将不胜感激。

编辑 使用 wcf 测试客户端我得到了这个：

Error: Cannot obtain Metadata from http://www.site.de/folder/ExampleService.svc If this is a Windows (R) Communication Foundation service to which you have access, please check that you have enabled metadata publishing at the specified address. For help enabling metadata publishing, please refer to the MSDN documentation at http://go.microsoft.com/fwlink/?LinkId=65455.WS-Metadata Exchange Error URI: http://www.site.de/folder/ExampleService.svc Metadata contains a reference that cannot be resolved: 'http://www.site.de/folder/ExampleService.svc'. The requested service, 'http://www.site.de/folder/ExampleService.svc' could not be activated. See the server's diagnostic trace logs for more information.HTTP GET Error URI: http://www.site.de/folder/ExampleService.svc The document at the url http://www.site.de/folder/ExampleService.svc was not recognized as a known document type.The error message from each known type may help you fix the problem:- Report from 'XML Schema' is 'Root element is missing.'.- Report from 'DISCO Document' is 'Root element is missing.'.- Report from 'WSDL Document' is 'There is an error in XML document (0, 0).'. - Root element is missing.

Answer 1

您需要指定一个 MEX（元数据交换）绑定来公开您的 WSDL。示例（查看地址“mex”）：

<service name="ExampleServices.ExampleService" behaviorConfiguration="LargeServiceBehavior">
    <endpoint address="http://www.site.de/folder/service.svc" binding="basicHttpBinding"
         bindingConfiguration="someBinding" 
    contract="ExampleServiceModels.IExampleService" />
    <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
</service>

在浏览器中获取 wsdl 类型： https://www.site.de/folder/service.svc?wsdl

Answer 2

不确定这个答案是否会在将近 3 年后对 OP 有所帮助。但它更适用于@GothamLlianen。但是，如果您想通过 HTTPS 连接访问 WFC 服务，则需要明确指定该绑定。

将此添加到 Web.Config 的 <system.serviceModel> 节点中

<bindings>
  <webHttpBinding>
    <binding name="HttpsBinding">
      <security mode="Transport">
        <transport clientCredentialType="None"/>
      </security>
    </binding>
  </webHttpBinding>
</bindings>

然后将name，在本例中为“HttpsBinding”添加到端点

<endpoint bindingConfiguration="HttpsBinding"

以下完整节点供参考

  <system.serviceModel>
    <services>
      <service behaviorConfiguration="ServiceBehaviour" name="MyProject.Api">
        <endpoint bindingConfiguration="HttpsBinding" address="" behaviorConfiguration="web" binding="webHttpBinding" contract="MyProject.IApi" />
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="ServiceBehaviour">
          <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true" />
          <serviceDebug includeExceptionDetailInFaults="false" />
          <serviceAuthorization principalPermissionMode="UseAspNetRoles" />
        </behavior>
      </serviceBehaviors>
      <endpointBehaviors>
        <behavior name="web">
          <webHttp defaultOutgoingResponseFormat="Json" defaultBodyStyle="Bare" />
        </behavior>
      </endpointBehaviors>
    </behaviors>
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
    <bindings>
      <webHttpBinding>
        <binding name="HttpsBinding">
          <security mode="Transport">
            <transport clientCredentialType="None"/>
          </security>
        </binding>
      </webHttpBinding>
    </bindings>
  </system.serviceModel>