javascript – Preflight具有无效的HTTP状态代码404 Jquery AJAX POST
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好吧,当它在控制台中出现此错误时,我真的很讨厌它.而且我知道stackoverflow充斥着这些类型的问题.但是,我已经完成了研究,并且在我的Web API 2 Web服务中启用了CORS,我仍然遇到此错误.
这是我的Web API 2代码:
namespace WebApi.App.Controllers
{
[EnableCors(origins: "*", headers: "*", methods: "*")]
public class ServiceController : ApiController
{
[HttpGet]
[Route("GetData")]
public IHttpActionResult GetEmpData(DATAvars theDATA)
{
return Ok("WORKED! " + theDATA);
}
[HttpPost]
[Route("PostData")]
public IHttpActionResult PostEmpData(DATAvars theDATA)
{
return Ok("WORKED! " + theDATA.theID);
}
}
public class DATAvars
{
public string theID { get; set; }
public string empImg { get; set; }
}
}
和
<system.webServer>
<modules runAllManagedModulesForAllRequests="true">
<remove name="WebDAVModule"/>
</modules>
<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>
<handlers>
<remove name="WebDAV" />
<remove name="ExtensionlessUrlHandler-Integrated-4.0" />
<remove name="OPTIONSVerbHandler" />
<remove name="TRACEVerbHandler" />
<add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
</handlers>
和
namespace WebApi.App
{
public static class WebApiConfig
{
public static void Register(HttpConfiguration config)
{
config.Formatters.Clear();
config.Formatters.Add(new JsonMediaTypeFormatter());
config.MapHttpAttributeRoutes();
config.EnableCors();
}
}
}
和
public class WebApiApplication : System.Web.HttpApplication
{
protected void Application_Start()
{
GlobalConfiguration.Configure(WebApiConfig.Register);
}
protected void Application_BeginRequest(object sender, EventArgs e)
{
HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin" , "*");
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" , "GET, POST" );
HttpContext.Current.Response.AddHeader("Access-Control-Allow-Headers" , "Content-Type, Accept" );
HttpContext.Current.Response.AddHeader("Access-Control-Max-Age", "1728000");
HttpContext.Current.Response.End();
}
}
}
然后为我的AJAX调用代码(在另一个域上托管):
$.ajax({
type: "POST",
crossDomain: true,
url: "http://dev-blahblah/newWS/PostData",
beforeSend: function (xhrObj) {
xhrObj.setRequestHeader("Content-Type", "application/json");
},
data: {
theID: "2135648792",
empImg: "false"
},
dataType: "json",
success: function (data) {
console.log(data);
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
console.log(XMLHttpRequest);
}
});
这是控制台中的错误:
控制台网络说:
Failed to load resource: the server responded with a status of 404 (Not Found)
index.html:1 XMLHttpRequest cannot load 07002. Response for preflight has invalid HTTP status code 404
现在这是SAME请求但在POSTMAN中:
我花了DAYS试图弄清楚这个和无休止的googleing找到例子,我有,但似乎所有的例子都不起作用.
我非常感谢有人让我知道我需要做什么才能使用JQUERY AJAX.
-Running it on the same domain in CHROME = WORKS
-Running it on a different domain in CHROME = DOES NOT WORK
-Running it on the same domain in IE = WORKS
-Running it on a different domain in IE = WORKS
解决方法:
在我的Web API web.config文件中使用以下配置部分以避免404错误.
<handlers>
<remove name="WebDAV"/>
<remove name="OPTIONSVerbHandler" />
<remove name="TRACEVerbHandler" />
<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" />
<add name="OPTIONSVerbHandler" path="*" verb="OPTIONS" modules="ProtocolSupportModule" requireAccess="None" responseBufferLimit="4194304" />
</handlers>
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