c# – WCF REST服务模板40(CS)跨域错误

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嗨,我有一个WCF休息服务使用(WCF REST服务模板40(CS)).我已设法让它返回Json响应.项目运行时工作正常.但是当我尝试从浏览器向服务进行Ajaxcall时,我收到错误：

Cross-Origin Request Blocked: The Same Origin Policy disallows reading
the remote resource at http://192.168.0.70:8001/Service/test.
This can be fixed by moving the resource to the same domain or
enabling CORS.

和Ajax电话：

$.ajax({
        type: "POST",
        url: "http://192.168.0.70:8001/Service/test",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        async: true,
        cache: false,
        success: function (msg) {
        var Tabels = msg.d;
        alert('success');
        }
    });

这是web.config：

    <?xml version="1.0"?>
    <configuration>
      <connectionStrings>

        <add name="ConString" connectionString="SERVER=localhost;DATABASE=fabapp;UID=root;PASSWORD=;"/>
      </connectionStrings>
      <system.web>
        <compilation debug="true" targetFramework="4.0" />
      </system.web>

      <system.webServer>
<httpProtocol>
      <customHeaders>
        <add name="Access-Control-Allow-Origin" value="*" />
      </customHeaders>
    </httpProtocol>
        <modules runAllManagedModulesForAllRequests="true">
          <add name="UrlRoutingModule" type="System.Web.Routing.UrlRoutingModule, System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
        </modules>
      </system.webServer>
      <system.serviceModel>
        <serviceHostingEnvironment aspNetCompatibilityEnabled="true"/>
        <standardEndpoints>
          <webHttpEndpoint>
            <!-- 
                Configure the WCF REST service base address via the global.asax.cs file and the default endpoint 
                via the attributes on the <standardEndpoint> element below
            -->
            <standardEndpoint name="" helpEnabled="true" automaticFormatSelectionEnabled="false" defaultOutgoingResponseFormat="Json"/>
          </webHttpEndpoint>
        </standardEndpoints>
      </system.serviceModel>

    </configuration>

我尝试添加crossDomainScriptAccessEnabled =“true”,但是当我这样做时,该服务也无法在localhost上运行.我明白了：

Cross domain javascript callback is not supported in authenticated
services.

我需要在web.config文件中更改什么？

解决方法:

实际上,我已经面临这个问题,我已经更进一步检查WebAPI,当我分析时,需要同样的努力.所以我不得不用WCF修复这个CORS.我会尽量解释一下.开始了.当您使用CrossOrigin访问WCF请求时,例如来自不同域中存在的JS代码,以及来自JS,您尝试执行PUT或POST请求,第一个浏览器发送一个OPTION请求405 HTTP状态,以查看该域是否在允许列表中,然后,如果您的WCF响应OPTIONS请求,发送带有标头值的必需响应,那么浏览器将再次执行POST或PUT请求(之前发布的浏览器),并且它将按预期工作.

注意：您不能发送(“Access-Control-Allow-Origin”,“*”),因为有一个安全功能,它要求在Access-Control-Allow-Origin中列出所需的域名而不是*.

欲了解更多信息 –

http://social.msdn.microsoft.com/Forums/ro-RO/5613de55-2573-49ca-a389-abacb39e4f8c/wcf-rest-service-post-cross-domain-not-working?forum=wcf

https://stackoverflow.com/questions/26163802/wcf-cors-request-from-jquery-not-working

从实际经验来看,我已尝试*在该标题中,它无法正常工作.如果你不相信我,请继续尝试.

最后代码如下.你需要把它放在Global.asax中.

protected void Application_BeginRequest(object sender, EventArgs e)
{
    String domainname = HttpContext.Current.Request.Headers["Origin"].ToString();
    if (IsAllowedDomain(domainname))
        HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin", domainname);
    String allowedmethods =  "POST, PUT, DELETE, GET";
    String headers = HttpContext.Current.Request.Headers["Access-Control-Request-Headers"].ToString();
    String accesscontrolmaxage =  "1728000";
    String contenttypeforoptionsrequest = "application/json";


    if (HttpContext.Current.Request.HttpMethod == "OPTIONS")
    {
        //These headers are handling the "pre-flight" OPTIONS call sent by the browser
        HttpContext.Current.Response.AddHeader("Access-Control-Allow-Methods", allowedmethods);
        HttpContext.Current.Response.AddHeader("Access-Control-Allow-Headers", headers);
        HttpContext.Current.Response.AddHeader("Access-Control-Max-Age", accesscontrolmaxage);
        HttpContext.Current.Response.AddHeader("ContentType", contenttypeforoptionsrequest);
        HttpContext.Current.Response.End();
    }

}
private bool IsAllowedDomain(String Domain)
{
    if (string.IsNullOrEmpty(Domain)) return false;
    string[] alloweddomains = "http://192.168.0.70:8001"; // you can place comma separated domains here.
    foreach (string alloweddomain in alloweddomains)
    {
        if (Domain.ToLower() == alloweddomain.ToLower())
            return true;
    }
    return false;
}

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