请问JS 如何保存后端传来的图片到本地计算机

Question

有后端图片的url，请问怎么保存到本地计算机。我用blob保存数据流的方式保存后发现图片不能打开，而且图片大小小于后端图片大小
$.ajax({
type: "GET",
url: '/api/settings/downLoad',
success: function(response, status, xhr) {
var filename = "down.jpeg";
var blob = new Blob([response], {
type: 'image/jpeg'

                    });
                    if (typeof window.navigator.msSaveBlob !== 'undefined') {
                        window.navigator.msSaveBlob(blob, filename);
                    } else {
                        var URL = window.URL || window.webkitURL||window;
                        var downloadURL = URL.createObjectURL(blob);
                        var a = document.createElement("a");
                        if (typeof a.download == "undefined") {
                            window.location = downloadURL;
                        } else {
                            /*var evt=document.createEvent("HTMLEvents");
                            evt.initEvent("click", false, false);*/
                            $(a).attr("href", downloadURL);
                            $(a).attr("download", filename);
                            $(a).attr("target", "_blank");
                            $(a).css({
                                "position": "absolute",
                                "opacity": "0"
                            });

                            document.body.appendChild(a);
                            a.click();

Answer 1

只是有路径，但是你没有指定图片的数据啊