跨域 WCF - Silverlight 配置错误 a:ActionNotSupported
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【中文标题】跨域 WCF - Silverlight 配置错误 a:ActionNotSupported【英文标题】:Crossdomain WCF - Silverlight configuration error a:ActionNotSupported 【发布时间】:2011-11-15 04:38:36 【问题描述】:我尝试从 SilverLight 代码运行 WCF 函数。 WCF 在网站 www.my-site.com 上运行 Silverlight 应用程序是从站点 www.my-site.com 下载的,作为从站点 www.vkontakte.ru 下载的 html 页面的 部分。我收到了一个 a:ActionNotSupported 错误。 怎么了?
这是我的 silverlight 应用程序发送的请求:
POST http://www.my-site.com/MyService.svc HTTP/1.1 接受:/ 推荐人:http://www.my-site.com/ClientBin/MySlApp.xap 接受语言:ru-RU 内容长度:153 内容类型:文本/xml;字符集=utf-8 SOAPAction:“http://tempuri.org/IMyService/Add” 接受编码:gzip、deflate 用户代理:Mozilla/5.0(兼容;MSIE 9.0;Windows NT 6.1;Trident/5.0) 主持人:www.my-site.com 连接:保持活动 编译指示:无缓存
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
<s:Body>
<Add xmlns="http://tempuri.org/">
<a1>1</a1>
<a2>1</a2>
</Add>
</s:Body>
</s:Envelope>
结果我收到了以下回复:
HTTP/1.1 500 内部服务器错误 缓存控制:私有 内容长度:710 内容类型:应用程序/xml;字符集=utf-8 服务器:Microsoft-IIS/7.5 X-AspNet-版本:4.0.30319 X-Powered-By:ASP.NET 日期:2011 年 9 月 11 日星期日 16:34:19 GMT
<Fault xmlns="http://schemas.microsoft.com/ws/2005/05/envelope/none">
<Code>
<Value>Sender</Value>
<Subcode>
<Value xmlns:a="http://schemas.microsoft.com/ws/2005/05/addressing/none">
a:ActionNotSupported
</Value>
</Subcode>
</Code>
<Reason>
<Text xml:lang="en-US">
The message with Action '' cannot be processed at the receiver,
due to a ContractFilter mismatch at the EndpointDispatcher.
This may be because of either a contract mismatch
(mismatched Actions between sender and receiver)
or a binding/security mismatch between the sender and the receiver.
Check that sender and receiver have the same contract and the same binding
(including security requirements, e.g. Message, Transport, None).
</Text>
</Reason>
</Fault>
Silverlight 请求代码:
BasicHttpBinding basicHttpBinding = new BasicHttpBinding();
EndpointAddress endpointAddress =
new EndpointAddress("http://www.my-site.com/MyService.svc");
IDbService service =
new ChannelFactory<IDbService>(basicHttpBinding, endpointAddress)
.CreateChannel();
AsyncCallback asy = delegate(IAsyncResult result)
Trace.WriteLine(service.EndAdd(result));
;
service.BeginAdd(1, 1, asy, null);
Silverlight 操作合约界面:
[ServiceContract]
public interface IMyService
[OperationContract(AsyncPattern = true)]
IAsyncResult BeginAdd(long a1, long a2, AsyncCallback callback, object state);
long EndAdd(IAsyncResult result);
WCF操作合约接口:
[ServiceContract]
public interface IMyService
[OperationContract]
long Add(long a1, long a2);
WCF 服务代码:
[AspNetCompatibilityRequirements(
RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class MyService: IMyService
public long Add(long a1, long a2)
return a1 + a2;
web.config 的一部分:
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior name="MySlApp.Web.ServiceMyServiceAspNetAjaxBehavior">
<serviceMetadata httpGetEnabled="true"/>
<serviceDebug includeExceptionDetailInFaults="true"/>
</behavior>
</serviceBehaviors>
<endpointBehaviors>
<behavior name="MySlApp.Web.MyServiceAspNetAjaxBehavior">
<enableWebScript />
</behavior>
</endpointBehaviors>
</behaviors>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true"
multipleSiteBindingsEnabled="true" />
<services>
<service name="MySlApp.Web.DbService"
behaviorConfiguration="MySlApp.Web.ServiceMyServiceAspNetAjaxBehavior">
<endpoint address=""
binding="webHttpBinding" contract="MySlApp.Web.IMyService" />
</service>
</services>
</system.serviceModel>
clientaccesspolicy.xml:
<?xml version="1.0" encoding="utf-8" ?>
<access-policy>
<cross-domain-access>
<policy>
<allow-from http-request-headers="*">
<domain uri="http://www.my-site.com" />
<domain uri="http://www.vkontakte.ru" />
<domain uri="http://*.vkontakte.ru" />
<domain uri="http://www.vk.com" />
<domain uri="http://*.vk.com" />
</allow-from>
<grant-to>
<resource path="/" include-subpaths="true"/>
</grant-to>
</policy>
</cross-domain-access>
</access-policy>
crossdomain.xml:
<?xml version="1.0" encoding="utf-8" ?>
<cross-domain-policy>
<allow-access-from domain="www.my-site.com" />
<allow-access-from domain="www.vkontakte.ru" />
<allow-access-from domain="*.vkontakte.ru" />
<allow-access-from domain="www.vk.com" />
<allow-access-from domain="*.vk.com" />
</cross-domain-policy>
【问题讨论】:
您将其创建为与 Silverlight 兼容的 WCF 服务还是普通的旧 WCF 服务? 【参考方案1】:这不是跨域问题。问题是您发送的请求符合basicHttpBinding
,而服务器端点使用webHttpBinding
。如果您将 web.config 更改为下面列出的配置,它应该可以工作。
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior name="MySlApp.Web.ServiceMyServiceAspNetAjaxBehavior">
<serviceMetadata httpGetEnabled="true"/>
<serviceDebug includeExceptionDetailInFaults="true"/>
</behavior>
</serviceBehaviors>
</behaviors>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true"
multipleSiteBindingsEnabled="true" />
<services>
<service name="MySlApp.Web.DbService"
behaviorConfiguration="MySlApp.Web.ServiceMyServiceAspNetAjaxBehavior">
<endpoint address=""
binding="basicHttpBinding" contract="MySlApp.Web.IMyService" />
</service>
</services>
</system.serviceModel>
如果您无法更改服务,则需要更改客户端。 webHttpBinding
端点也称为 WCF WebHttp 端点,或(以某种方式过度使用“REST”术语)WCF REST 端点,不能使用 WCF 编程模型(客户端类、ChannelFactory<T>
等)通过 SL 直接访问。可以做到(参见关于consuming REST/POX services via SL 的帖子和关于consuming REST/JSON services via SL 的帖子),但这并不是一件容易的事(大多数人使用简单的类,例如WebClient
或HttpWebRequest
来使用这些服务。
【讨论】:
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