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 充满了这些类型的问题。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();
}
}
}
然后我的AJAX调用代码(托管在另一个域上):
$.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);
}
});
无法加载资源:服务器响应状态为404(未找到) index.html:1 XMLHttpRequest无法加载http://dev-blahblah/newWS/PostData。预检的响应具有无效的HTTP状态代码404
我花了 DAYS 试图解决这个问题并且无休止的googleing找到示例,我有,但似乎所有示例都不起作用。
我会非常感激让某人知道我需要做些什么才能让这个与JQUERY AJAX一起工作。
- 在CHROME = WORKS
中在同一个域上运行它- 在CHROME中的另一个域上运行它=不工作
- 在IE = WORKS
中的相同域上运行它- 在IE = WORKS
中的不同域上运行它
答案 0 :(得分:0)
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>
答案 1 :(得分:0)
删除WebDAV对我不起作用,因为我的服务器上可能存在全局策略。然而,这削减了它:
<system.webServer>
<security>
<requestFiltering>
<verbs applyToWebDAV="false">
<add verb="DELETE" allowed="true" />
<add verb="PUT" allowed="true" />
<add verb="OPTIONS" allowed="true" />
</verbs>
</requestFiltering>
</security>
</system.webServer>
<add verb="OPTIONS" allowed="true" />
是有所作为的。