我已经阅读了大多数涉及跨域错误的主题,但仍无法使其正常运行。在网站中,我加载了与WCF Webservice通信的Silverlight模块。在localhost上,它工作正常,没有发生错误。
我在http://localhost:50283上托管了Webservice,并在端口50283所指的同一文件夹中找到了 clientaccesspolicy.xml ,如下所示
<access-policy>
<cross-domain-access>
<policy>
<allow-from http-request-headers="*">
<domain uri="*"/>
</allow-from>
<grant-to>
<resource path="/" include-subpaths="true"/>
</grant-to>
</policy>
</cross-domain-access>
</access-policy>
我放置了clientaccesspolicy.XML几乎无处不在,包括\ wwwroot,但无论如何都没有带来任何影响。我可以在同一网络中的本地和另一台计算机上访问 clientaccesspolicy.xml (http://computerIP:50283/clientaccesspolicy.xml显示内容)。我试图拦截错误,以便找出有关错误性质的更多细节,但是fiddler不会出现任何错误,唯一的浏览器就是这样。从字面上看,我尝试了一切,但仍然没有改变。有没有人遇到类似的问题,可以提供一些我应该寻求解决方案的提示?
我遇到了类似的话题,没有解决方案,唉 Silverlight-to-WCF cross-domain exception, but clientaccesspolicy.xml is being read successfully
答案 0 :(得分:3)
我记得很多年前遇到这种情况并且解决方法有点不同,即行为。请考虑以下事项:
using System;
using System.IO;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Configuration;
using System.ServiceModel.Description;
using System.Xml;
internal class CrossDomainServiceBehavior : BehaviorExtensionElement, IEndpointBehavior
{
private ServiceHost serviceHost;
public override Type BehaviorType
{
get { return typeof(CrossDomainServiceBehavior); }
}
public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters)
{
if (serviceHost == null)
{
serviceHost = new ServiceHost(typeof(CrossDomainPolicyService));
string address = new Uri(endpoint.Address.Uri, "/").ToString();
ServiceEndpoint crossDomainEndpoint = serviceHost.AddServiceEndpoint(typeof(ICrossDomainPolicyService), new WebHttpBinding(), address);
crossDomainEndpoint.Behaviors.Add(new WebHttpBehavior());
serviceHost.Open();
}
}
public void ApplyClientBehavior(ServiceEndpoint endpoint, System.ServiceModel.Dispatcher.ClientRuntime clientRuntime)
{
}
public void ApplyDispatchBehavior(ServiceEndpoint endpoint, System.ServiceModel.Dispatcher.EndpointDispatcher endpointDispatcher)
{
}
public void Validate(ServiceEndpoint endpoint)
{
}
protected override object CreateBehavior()
{
return new CrossDomainServiceBehavior();
}
}
internal class CrossDomainPolicyService : ICrossDomainPolicyService
{
public Message ProvideClientAccessPolicyFile()
{
XmlReader xmlReader = CreateClientAccessXml();
return Message.CreateMessage(MessageVersion.None, string.Empty, xmlReader);
}
public Message ProvideCrossDomainPolicyFile()
{
XmlReader xmlReader = CreateCrossDomainXml();
return Message.CreateMessage(MessageVersion.None, string.Empty, xmlReader);
}
private static XmlReader CreateClientAccessXml()
{
TextReader reader = new StringReader(@"<?xml version='1.0' encoding='utf-8'?>
<access-policy>
<cross-domain-access>
<policy>
<allow-from http-request-headers='*' >
<domain uri='*'/>
</allow-from>
<grant-to>
<resource path='/' include-subpaths='true'/>
</grant-to>
</policy>
</cross-domain-access>
</access-policy>");
return XmlReader.Create(reader);
}
private static XmlReader CreateCrossDomainXml()
{
TextReader reader = new StringReader(@"<?xml version='1.0'?>
<cross-domain-policy>
<allow-http-request-headers-from domain='*' headers='*'/>
</cross-domain-policy>");
return XmlReader.Create(reader);
}
}
需要将CrossDomainServiceBehavior添加到WCF服务上的行为,并使用CrossDomainPolicyService动态添加跨域策略。这可以防止您必须将跨域文件添加到网站本身。
从代码中添加行为(例如,使用自托管服务):
endPoint.Behaviors.Add(new CrossDomainServiceBehavior());
或者在配置中的WCF定义的情况下: 为了这个例子,我将假设CrossDomainServiceBehavior位于名称空间Services.CrossDomainServiceBehavior中,它所在的程序集是版本1.0.0.0,具有中性文化。它还假设您对名为webHttp的服务声明具有绑定。
注册行为:
<system.serviceModel>
<extensions>
<behaviorExtensions>
<add name="CrossDomainServiceBehavior" type="Services.CrossDomainServiceBehavior, CrossDomainServiceBehavior.AssemblyName, Version=1.0.0.0, Culture=neutral" />
</behaviorExtensions>
</extensions>
声明行为:
<behaviors>
<endpointBehaviors>
<behavior name="CrossDomainServiceBehavior">
<webHttp/>
<CrossDomainServiceBehavior/>
</behavior>
</endpointBehaviors>
<behaviors>
将行为添加到绑定(此处为名为webHttp的示例):
<bindings>
<webHttpBinding>
<binding name="webHttp"
maxReceivedMessageSize="20000000" >
<security mode="None">
<transport clientCredentialType = "None"/>
</security>
</binding>
<CrossDomainServiceBehavior />
</webHttpBinding>
</bindings>
最后,将行为添加到服务端点,此处为实现ISomeService的示例:
<endpoint address="" binding="webHttpBinding" contract="Services.ISomeService" bindingConfiguration="webHttp" behaviorConfiguration="CrossDomainServiceBehavior "/>
答案 1 :(得分:1)
不确定是否必须对它做任何事情,但我有类似的设置,而我的clientaccesspolicy.xml看起来有点不同。
<?xml version="1.0" encoding="utf-8" ?>
<access-policy>
<cross-domain-access>
<policy>
<allow-from http-request-headers="SOAPAction">
<domain uri="http://*"/>
<domain uri="https://*" />
</allow-from>
<grant-to>
<resource include-subpaths="true" path="/"/>
</grant-to>
</policy>
</cross-domain-access>
</access-policy>
特别是http和https地址的分割是不同的。 除此之外,您尝试使用非默认端口执行此操作,您是否在默认端口80上尝试过它?哦,在生产环境中,这些*被替换为实际的域名。