Cors专门在Internet Explorer XMLHttpRequest中发出：网络错误0x80070005，访问被拒绝

Question

只有在从ajax调用调用API时，才会在Internet Explorer中专门发布Cors。

1）Access-Control-Allow-Headers列表中不存在请求头内容类型2）XMLHttpRequest：网络错误0x80070005，拒绝访问。

我尝试了以下

   xhrFields: {
     withCredentials: true
    }

也通过设置...

crossDomain：true

...

标题：{'Access-Control-Allow-Origin'：'*'}，

Ajax调用

    var url = "https://dev-connectivity.dummylink";
 var data = JSON.stringify({    
    "lang": "en",
    "ClientId": "asdfasf3452345c42352345c",
    "CountryCode": "34"
});  

     $.ajax({
    url: url,
    type: 'POST',
    contentType: 'application/json; charset=utf-8',
    headers: {
        'Access-Control-Allow-Origin': '*' },
    data: data,
    success: function (data) {
        alert("tets");
    },
    error: function (error) {
       alert("error");
                }
});

//我的api Web配置代码

     <httpProtocol>
    <customHeaders>
      <remove name="Access-Control-Allow-Origin" />
      <add name="Access-Control-Allow-Origin" value="*" />
      <add name="Access-Control-Allow-Methods" value="*" />
      <add name="Access-Control-Allow-Headers" value="*" />
    </customHeaders>
  </httpProtocol>

//也在启动时启用Cors

          services.AddCors(o => o.AddPolicy("CorsPolicy", builder =>
        {
            builder.AllowAnyMethod()
                .AllowAnyHeader();
        }));

app.UseCors（“CorsPolicy”）;

Answer 1

如果您在web.config文件中提供了*，则IE不接受Content-Type标头，以解决此问题，您需要在web.config文件中的Access-Control-Allow-Headers列表中手动添加Content-Type标头。

  <customHeaders>
     <remove name="Access-Control-Allow-Origin" />
     <add name="Access-Control-Allow-Origin" value="*" />
     <add name="Access-Control-Allow-Headers" value="Content-Type, Any-Other-Header" />
  </customHeaders>