JS实现网页下载[转]

Posted 2020-08-14 jimson

    function downloadById() {
        var url = "http://localhost:64610/WorkProcess/ResumeDetail/7";
        new FileDownloader({
            url: encodeURI(url),
            filename: "resume.html"
        });
    }
    (function (e) {
        "use strict";
        function r(e, t, n) {
            var r = function () {
                n.apply(e, arguments)
            };
            if (e.addEventListener) {
                e.addEventListener(t, r, false)
            } else {
                e.attachEvent("on" + t, r)
            }
            return r
        }

        function i(e, t) {
            var n = arguments.length > 2 ? Array.prototype.slice.call(arguments, 1) : [];
            var r;
            for (var s = 0; s < n.length; s++) {
                r = n[s];
                for (var o in r) {
                    if (typeof r[o] === "object") {
                        e[o] = i({}, r[o])
                    } else if (o != null && r.hasOwnProperty(o) && typeof r[o] !== "undefined") {
                        e[o] = r[o]
                    }
                }
            }
            return e
        }

        function s(t, n) {
            var r = document.createElementNS("http://www.w3.org/1999/xhtml", "a");
            r.download = t;
            r.href = URL.createObjectURL(n);
            var i = document.createEvent("MouseEvents");
            i.initMouseEvent("click", true, true, e, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
            r.dispatchEvent(i)
        }

        function o(e, t, n) {
            var r;
            t = t || "GET";
            if (window.XMLHttpRequest) {
                r = new XMLHttpRequest
            } else {
                r = new ActiveXObject("Microsoft.XMLHTTP")
            }
            r.open(t, e, true);
            r.responseType = "blob";
            r.onreadystatechange = function () {
                if (r.readyState == r.DONE) {
                    if (n) n.call(r, r.response)
                }
            };
            r.send();
            return r
        }
        var t = {
            url: "",
            filename: "",
            type: "GET",
            progress: function () { },
            done: function () { }
        };
        var n = function (e) {
            function h(e) {
                var t = e.total;
                var r = e.loaded;
                var i = r / t;
                var s = (new Date).getTime();
                var o = (s - l) / 1e3;
                var u = r - c;
                var a = u / o;
                c = r;
                l = s;
                e.per = i;
                e.speed = a;
                n.progress.call(f, e)
            }

            function p(e) {
                var t = n.done();
                if (typeof t === "boolean" && !t) return t;
                s(a, e)
            }
            var n = i({}, t, e);
            var u = n.url;
            var a = n.filename;
            var f = o(u, n.type, p);
            var l = (new Date).getTime();
            var c = 0;
            r(f, "progress", h)
        };
        e.FileDownloader = n
    })(window)
    //---------------------------------------------------------------------------