wcf寄宿在iis上的跨域访问问题【不止是添加跨域文件】

当客户端为silverlight或者其它不默认支持跨域的技术时，需要为wcf手动开启跨域，详细方法如下：

首先跨域文件是必须的

ClientAccessPolicy.xml

 1 <?xml version="1.0" encoding="utf-8"?>
 2  <access-policy>
 3   <cross-domain-access>
 4     <policy>
 5       <allow-from http-request-headers="*">
 6         <domain uri="*"/>
 7       </allow-from>
 8       <grant-to>
 9         <resource path="/" include-subpaths="true"/>
10       </grant-to>
11     </policy>
12   </cross-domain-access>
13 </access-policy>

CrossDomain.xml

1 <?xml version="1.0"?>
2 <cross-domain-policy>
3   <allow-access-from domain="*" />
4 </cross-domain-policy>

以上两个跨域文件需放在部署在iis上的根目录下。

服务端config配置如下：

 1 <system.serviceModel>
 2     <behaviors>
 3       <serviceBehaviors>
 4         <behavior name="LoggerBehavior">
 5           <serviceDebug includeExceptionDetailInFaults="true" />
 6           <serviceMetadata httpGetEnabled="true" />       
 7         </behavior>
 8       </serviceBehaviors>
 9     </behaviors>
10     <extensions>
11     </extensions>
12     <bindings>
13       <basicHttpBinding>
14         <binding name="UnSecureConversationBinding" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="1048576" maxBufferPoolSize="2097152" maxReceivedMessageSize="1048576" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true">
15           <readerQuotas maxDepth="32" maxStringContentLength="16777216" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
16           <security mode="None"></security>       
17         </binding>
18       </basicHttpBinding>
19     </bindings>
20     <services>
21       <service behaviorConfiguration="LoggerBehavior" name="eTank.OIU.Service.OIUService" >
22         <endpoint  binding="basicHttpBinding" bindingConfiguration="UnSecureConversationBinding" contract="eTank.OIU.Contract.IOIUUC" />
23         <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
24       </service>
25       <service behaviorConfiguration="LoggerBehavior" name="eTank.OIU.Service.SMSConfigService" >
26         <endpoint  binding="basicHttpBinding" bindingConfiguration="UnSecureConversationBinding" contract="eTank.OIU.Contract.ISMSConfigUC" />
27         <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
28       </service>
29     </services>
30   </system.serviceModel>

以上服务器配置需要注意的地方为：

1.behavior中的<serviceMetadata httpGetEnabled="true" />是必须的；

2.binding中的安全级别设为none，如：<security mode="None"></security>；

3.每个服务添加一个元数据的终结点配置，如：<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>；

完成以上配置以后silverlight等客户端即可以实现跨域访问wcf服务了。