js中如何使用ajax的get来向后台获取文件流进行文件下载（其中header中传token参数）

Question

js中如何使用ajax的get来向后台获取文件流进行文件另存为的下载其中header需要传token和os参数到后台进行验证请问这个JS应该如何写？希望大神不吝赐教，谢谢~如下方法后台无法获取header参数，360浏览器中也没有启动另存为的窗口var url = "{#$apiHost#}/aw/export?brand_ids="+brand_ids;var xhr = new XMLHttpRequest(); xhr.open('GET', url, true); xhr.responseType = "blob"; xhr.setRequestHeader("token", "5f963175cc75613398e25ce2e5da56d7"); xhr.setRequestHeader("os", "1"); xhr.onload = function() {     if (this.status == 200) {         try{                     var elemIF = document.createElement("iframe");                         elemIF.src = this.responseURL;                         elemIF.style.display = "none";                                     document.body.appendChild(elemIF);         }catch(e){         }     } } xhr.send();

Answer 1

var xhh = new XMLHttpRequest();
                xhh.open("post", Action.FILES_W_DOWNLOADFILE + "/"+ fileName );
                xhh.setRequestHeader("Authorization", this.Axios.defaults.headers.Authorization = JSON.parse(getCookie('userInfo')).tokenType+ ' ' + JSON.parse(getCookie('userInfo')).accessToken);
                xhh.setRequestHeader("Content-Type","application/json");
                xhh.responseType = 'blob';
                xhh.onreadystatechange = function () {
                       if (xhh.readyState === 4 && xhh.status === 200) {                        
                       var name = xhh.getResponseHeader("ajax-filename");                        
                       var mimeType = xhh.getResponseHeader("ajax-mimeType");                        
                       var blob = new Blob([xhh.response], {type: mimeType});                        
                       var csvUrl = URL.createObjectURL(blob);                        
                       var link = document.createElement('a');                        
                       document.body.appendChild(link); //创建的标签添加到body，解决Firefox下无法打开页面的问题
                        link.href = csvUrl;
                        link.target = '_blank';
                        link.id = 'linkId',
                        link.className = 'linkId',
                        link.download = decodeURI(name);                        
                        document.getElementById("linkId").click();                        
                        // link.remove(); //将a标签移除
                        $('.linkId').remove()
                    }
                };
                xhh.send();

改成这样就好了。