关于服务跨域边界可用问题

今天在做silverlight调用wcf的时候遇到一个问题，Debug的时候抛出"An error occurred while trying to make a request to URI
'http://localhost:XXXX/XXXX.svc'. This could be e to attempting to access a service in a cross-domain way without

a proper cross-domain policy in place, or a policy that is unsuitable for SOAP services...."，经过查找发现有好多人遇到这个

问题经过一翻折腾终于解决了。

首先你需要向你的wcf的服务端添加两个xml文件，一个是clientaccesspolicy.xml文件

 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"/>
      </grant-to>
    </policy>
  </cross-domain-access>
</access-policy>

第二个重要的文件是crossdomain.xml

<?xml version="1.0"?>
<!DOCTYPE cross-domain-policy SYSTEM "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd">
<cross-domain-policy>
  <allow-http-request-headers-from domain="*" headers="*"/>
</cross-domain-policy>

到这里就结束了吗？当然不是紧接着抛出第二个问题"The remote server returned an error: NotFound",

看到这个错误我就想到了config中的binding，于是查找一翻，在config中添加一个binding就好了

 

 1    <bindings>
 2      <basicHttpBinding>
 3        <binding name="myServicesBinding" maxReceivedMessageSize="2000000" maxBufferSize="2000000">
 4          <readerQuotas maxDepth="50" maxArrayLength="2000000" maxStringContentLength="2000000"/>
 5        </binding>
 6      </basicHttpBinding>
 7    </bindings>
 8
 9            <service behaviorConfiguration="SilverlightWcf.BlogBehavior" name="SilverlightWcf.Blog">
                <host>
                    <baseAddresses>
                        <add baseAddress="http://172.28.3.99:8010/Blog.svc"/>
                    </baseAddresses>
                    <timeouts closeTimeout="00:00:20" openTimeout="00:02:00"/>
                </host>
                <endpoint address="" bindingConfiguration="myServicesBinding" binding="basicHttpBinding" contract="SilverlightWcf.IBlog">
                    <identity>
                        <dns value="localhost"/>
                    </identity>
                </endpoint>
                <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
            </service>
        </services>

 

虽然这个问题解决了但真正的原因还是有些不清楚，也请哪位高手能指点一下