为什么Edge中XMLHttpRequest请求的响应来自缓存？

Question

我在Edge中使用XMLHttpRequest，但是得到这个。我使用各种请求，例如：Fetch，XMLHttpRequest，superagen，它们都是一样的XMLHttpRequst failed

它可以在Chrome / ie / etc。但仅在Edge中失败。

奇怪的是，当我打开Fiddler4时，请求成功，一切都显示完美。

var xhr = new XMLHttpRequest();
    let uri = 'http://' + '10.13.40.70' + ':' + '55666' + '/connect' + '?ts=' + new Date().getTime() + "&webconnectid=" + '0037d82f5c17830b437188e33f91a5c3' + "&webconnecttype=" + 'WEBCONNECTTYPE_FIRST' ;
    console.log(uri)
    xhr.open('GET', uri);
    xhr.setRequestHeader('Cache-Control', 'max-age=0');
    xhr.setRequestHeader('Access-Control-Allow-Origin', '*');
    xhr.setRequestHeader('Access-Control-Allow-Credentials', 'true');
    xhr.setRequestHeader('If-Modified-Since', 'no-cache');
    xhr.send();
    xhr.onreadystatechange = function(){
      console.log("readyState:" + this.readyState)
    }
    xhr.onload = function() {
        console.log(xhr)
        if (xhr.status != 200) { // analyze HTTP status of the response
          alert(`Error ${xhr.status}: ${xhr.statusText}`); // e.g. 404: Not Found
        } else { // show the result
          alert(`Done, got ${xhr.response.length} bytes`); // responseText is the server
        }
    };

    xhr.onerror = function(){
       console.log(xhr)
       alert("failed !")
    }

opened Fiddler4

我想知道为什么会这样。

Answer 1

对不起，这是我的代码：

    var xhr = new XMLHttpRequest();
    let uri = 'http://' + '10.13.40.70' + ':' + '55666' + '/connect' + '?ts=' + new Date().getTime() + "&webconnectid=" + '0037d82f5c17830b437188e33f91a5c3' + "&webconnecttype=" + 'WEBCONNECTTYPE_FIRST' ;
    console.log(uri)
    xhr.open('GET', uri);
    xhr.setRequestHeader('Cache-Control', 'max-age=0');
    xhr.setRequestHeader('Access-Control-Allow-Origin', '*');
    xhr.setRequestHeader('Access-Control-Allow-Credentials', 'true');
    xhr.setRequestHeader('If-Modified-Since', 'no-cache');
    xhr.send();
    xhr.onreadystatechange = function(){
      console.log("readyState:" + this.readyState)
    }
    xhr.onload = function() {
        console.log(xhr)
        if (xhr.status != 200) { // analyze HTTP status of the response
          alert(`Error ${xhr.status}: ${xhr.statusText}`); // e.g. 404: Not Found
        } else { // show the result
          alert(`Done, got ${xhr.response.length} bytes`); // responseText is the server
        }
    };

    xhr.onerror = function(){
       console.log(xhr)
       alert("failed !")
    }