我有一个托管在 Azure 上的 ASP.NET Web API。我已将 HTTP 消息处理程序集成到该 API。当我使用 AJAX 调用击中消息处理程序时,它会被击中。我还在我的 AJAX 调用中发送了一些请求标头。问题是我没有从 AJAX 调用发送到 Web API 中集成的消息处理程序的标头。参考图片:调试器截图
下面是我的 AJAX 请求的代码:
$.ajax({
url: "https://someservicename.azurewebsites.net/Service/RequestHandler",
beforeSend: function (xhr) {
xhr.setRequestHeader('Token', '86810e135958961ad4880ad');
},
type: "POST",
crossDomain: true,
data: {
param: "Passed Parameter"
},
success: function (msg) {
console.log(msg);
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
console.log(textStatus);
}
});
Web API 中的消息处理程序如下所示:
protected async override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
string authToken;
try
{
authToken = request.Headers.GetValues("Token").FirstOrDefault();
if (authToken != "86810e135958961ad4880ad")
{
return await Task.Factory.StartNew(() =>
{
return new HttpResponseMessage(HttpStatusCode.BadRequest)
{
Content = new StringContent("Unauthorized access!")
};
});
}
else
{
return await base.SendAsync(request, cancellationToken);
}
}
catch (System.InvalidOperationException)
{
return null;
}
}
当我从我的 IIS 本地主机运行代码时,发送的请求如下所示:
Accept:*/*
Accept-Encoding:gzip, deflate, sdch, br
Accept-Language:en-US,en;q=0.8
Access-Control-Request-Headers:token
Access-Control-Request-Method:POST
Connection:keep-alive
Host:someservicename.azurewebsites.net
Origin:http://localhost:12522
Referer:http://localhost:12522/pocppd.html
User-Agent:Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36
我在控制台中得到的响应是:
https://someservicename.azurewebsites.net/Service/RequestHandler. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:12522' is therefore not allowed access. The response had HTTP status code 500.
使用 POSTMAN 客户端,请求工作正常,但从本地主机返回错误。请让我知道在我的消息处理程序中没有获取标题的原因?