xmlhttprequest无法加载响应URL。预检具有无效的HTTP状态代码405 $ http.delete

Question

我有网络API服务：

public void Delete(int id) 
     { 
} 

的Web API-的Web.config

<httpProtocol> 
     <customHeaders> 
     <add name="Access-Control-Allow-Origin" value="*" /> 
     <add name="Access-Control-Allow-Headers" value="Content-Type" /> 
     <add name="Access-Control-Allow-Methods" value="GET, POST, PUT, DELETE, OPTIONS" /> 
     </customHeaders> 
    </httpProtocol> 
    <validation validateIntegratedModeConfiguration="false" /> 
    <directoryBrowse enabled="true" /> 
    <modules runAllManagedModulesForAllRequests="true" /> 
    <handlers> 
     <remove name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" /> 
     <remove name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" /> 
     <remove name="ExtensionlessUrlHandler-Integrated-4.0" /> 
     <add name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll" 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.NET\Framework64\v4.0.30319\aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv4.0,bitness64" responseBufferLimit="0" /> 
     <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" /> 
    </handlers> 

当我使用它使用邮差（Chrome扩展）。我将数据作为“表单数据”传递。我得到200个返回码。 我使用angularjs调用这个方法：

deletesurvey: function(surveyData) { 
       var objFormData = new FormData(); 
       for (var key in surveyData) 
        objFormData.append(key, surveyData[key]); 
       return $http.delete(configurationurl + 'Survey', objFormData, { 
        transformRequest: angular.identity, 
        headers: { 'Content-Type': undefined } 
       }); 

我已经设置头在我的web.config：

<modules runAllManagedModulesForAllRequests="true" /> 
    <httpProtocol> 
     <customHeaders> 
     <add name="Access-Control-Allow-Origin" value="*" /> 
     <add name="Access-Control-Allow-Methods" value="GET,POST,PUT,HEAD,DELETE,OPTIONS" /> 
     <add name="Access-Control-Allow-Headers" value="Origin, X-Requested-With, Content-Type, Accept" /> 
     <add name="Access-Control-Request-Methods" value="*" /> 
     <add name="Access-Control-Max-Age" value="1728000" /> 

     </customHeaders> 
    </httpProtocol> 

它称之为deletesurvey功能它给我的错误后（Browser是铬） xmlhttprequest无法加载响应URL的预检具有无效http状态代码405

Answer 1

似乎正在发生的是CORS“预检”请求（它使用OPTIONS方法）没有/不正确地由服务器处理。

推荐阅读：

• HTML5 Rocks tutorial
• The awesome Enable CORS website

到preflight请求的响应应该包含这样的

OPTIONS/HTTP/1.1 
Origin: http://example.com 
Access-Control-Request-Method: DELETE 

（Access-Control-Request-Method是主要的焦点在这里）

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至于为何“Postman'展期，并不给这个老马，它根本就不是受Same Origin Policy