.net IIS MVC Rest api 跨域 PUT DELETE 404 无法使用问题解决方案

一、WebConfig配置法(system.webServer 重点是 httpProtocol handlers)

http://www.jinxuliang.com/blog/article/read/3348d442-9432-49d8-abe9-2c64ce6436cd

http://www.matlus.com/rest-apis-put-and-delete-cause-http-error-404/  * 

2个内容配合使用 ,第二个连接的方法,会自动改Web.config

 <system.webServer>
    <!--IIS7/7.5上必须加这个配置,否则访问报错-->
    <modules runAllManagedModulesForAllRequests="true">
      <remove name="WebDAVModule"/>
    </modules>
    <validation validateIntegratedModeConfiguration="false"/>
    <!--以下配置为了让IIS7+支持Put/Delete方法(CORS)-->
    <httpProtocol>
      <customHeaders>
        <!--<add name="Access-Control-Allow-Origin" value="http://*.com" />-->
        <!--<add name="Access-Control-Allow-Origin" value="http://local*:49356" />-->
        <add name="Access-Control-Allow-Methods" value="GET,POST,PUT,DELETE,PATCH,OPTIONS"/>
        <add name="Access-Control-Allow-Headers" value="Accept,Content-Type,X-Requested-With"/>
        <add name="Access-Control-Allow-Credentials" value="true"/>
        <!-- 跨域session保持 -->
      </customHeaders>
    </httpProtocol>

 <handlers>
      <remove name="ExtensionlessUrlHandler-ISAPI-4.0_64bit"/>
      <remove name="ExtensionlessUrlHandler-ISAPI-4.0_32bit"/>
      <remove name="WebDAV"/>
      <remove name="OPTIONSVerbHandler"/>
      <!--跨域重点配置-->
      <add name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%Microsoft.NETFrameworkv4.0.30319aspnet_isapi.dll" resourceType="Unspecified" requireAccess="Script" preCondition="classicMode,runtimeVersionv4.0,bitness32" responseBufferLimit="0"/>
      <add name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%Microsoft.NETFramework64v4.0.30319aspnet_isapi.dll" resourceType="Unspecified" requireAccess="Script" preCondition="classicMode,runtimeVersionv4.0,bitness64" responseBufferLimit="0"/>
    </handlers>
</system.webServer>

 ***************

<remove name="OPTIONSVerbHandler"/>

 二、终级Global.asax代码处理方法

 //cros  跨域请求配置
    protected void Application_BeginRequest(object sender, EventArgs e)
    {
        string origin = HttpContext.Current.Request.Headers["Origin"];
        if (origin != null)
        {
            HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin", origin);
        }
        else
        {
            HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin", "*");
        }
        if (HttpContext.Current.Request.HttpMethod == "OPTIONS" && Request.RawUrl.ToLower().Contains(".asmx/"))
        {
            HttpContext.Current.Response.End();
        }

    }