downlaods files
此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.cn-greasyfork.org/scripts/381311/685821/downloadjs.js
(function (root, factory) {
if (typeof define === 'function' && define.amd) {
// AMD. Register as an anonymous module.
define([], factory);
} else if (typeof exports === 'object') {
// Node. Does not work with strict CommonJS, but
// only CommonJS-like environments that support module.exports,
// like Node.
module.exports = factory();
} else {
// Browser globals (root is window)
root.download = factory();
}
}(this, function () {
return function download(data, strFileName, strMimeType) {
var self = window, // this script is only for browsers anyway...
defaultMime = "application/octet-stream", // this default mime also triggers iframe downloads
mimeType = strMimeType || defaultMime,
payload = data,
url = !strFileName && !strMimeType && payload,
anchor = document.createElement("a"),
toString = function (a) { return String(a); },
myBlob = (self.Blob || self.MozBlob || self.WebKitBlob || toString),
fileName = strFileName || "download",
blob,
reader;
myBlob = myBlob.call ? myBlob.bind(self) : Blob;
if (String(this) === "true") { //reverse arguments, allowing download.bind(true, "text/xml", "export.xml") to act as a callback
payload = [payload, mimeType];
mimeType = payload[0];
payload = payload[1];
}
if (url && url.length < 2048) { // if no filename and no mime, assume a url was passed as the only argument
fileName = url.split("/").pop().split("?")[0];
anchor.href = url; // assign href prop to temp anchor
if (anchor.href.indexOf(url) !== -1) { // if the browser determines that it's a potentially valid url path:
var ajax = new XMLHttpRequest();
ajax.open("GET", url, true);
ajax.responseType = 'blob';
ajax.onload = function (e) {
download(e.target.response, fileName, defaultMime);
};
setTimeout(function () { ajax.send(); }, 0); // allows setting custom ajax headers using the return:
return ajax;
} // end if valid url?
} // end if url?
//go ahead and download dataURLs right away
if (/^data\:[\w+\-]+\/[\w+\-]+[,;]/.test(payload)) {
if (payload.length > (1024 * 1024 * 1.999) && myBlob !== toString) {
payload = dataUrlToBlob(payload);
mimeType = payload.type || defaultMime;
} else {
return navigator.msSaveBlob ? // IE10 can't do a[download], only Blobs:
navigator.msSaveBlob(dataUrlToBlob(payload), fileName) :
saver(payload); // everyone else can save dataURLs un-processed
}
}//end if dataURL passed?
blob = payload instanceof myBlob ?
payload :
new myBlob([payload], { type: mimeType });
function dataUrlToBlob(strUrl) {
var parts = strUrl.split(/[:;,]/),
type = parts[1],
decoder = parts[2] == "base64" ? atob : decodeURIComponent,
binData = decoder(parts.pop()),
mx = binData.length,
i = 0,
uiArr = new Uint8Array(mx);
for (i; i < mx; ++i) uiArr[i] = binData.charCodeAt(i);
return new myBlob([uiArr], { type: type });
}
function saver(url, winMode) {
if ('download' in anchor) { //html5 A[download]
anchor.href = url;
anchor.setAttribute("download", fileName);
anchor.className = "download-js-link";
anchor.innerHTML = "downloading...";
anchor.style.display = "none";
document.body.appendChild(anchor);
setTimeout(function () {
anchor.click();
document.body.removeChild(anchor);
if (winMode === true) { setTimeout(function () { self.URL.revokeObjectURL(anchor.href); }, 250); }
}, 66);
return true;
}
// handle non-a[download] safari as best we can:
if (/(Version)\/(\d+)\.(\d+)(?:\.(\d+))?.*Safari\//.test(navigator.userAgent)) {
url = url.replace(/^data:([\w\/\-\+]+)/, defaultMime);
if (!window.open(url)) { // popup blocked, offer direct download:
if (confirm("Displaying New Document\n\nUse Save As... to download, then click back to return to this page.")) { location.href = url; }
}
return true;
}
//do iframe dataURL download (old ch+FF):
var f = document.createElement("iframe");
document.body.appendChild(f);
if (!winMode) { // force a mime that will download:
url = "data:" + url.replace(/^data:([\w\/\-\+]+)/, defaultMime);
}
f.src = url;
setTimeout(function () { document.body.removeChild(f); }, 333);
}//end saver
if (navigator.msSaveBlob) { // IE10+ : (has Blob, but not a[download] or URL)
return navigator.msSaveBlob(blob, fileName);
}
if (self.URL) { // simple fast and modern way using Blob and URL:
saver(self.URL.createObjectURL(blob), true);
} else {
// handle non-Blob()+non-URL browsers:
if (typeof blob === "string" || blob.constructor === toString) {
try {
return saver("data:" + mimeType + ";base64," + self.btoa(blob));
} catch (y) {
return saver("data:" + mimeType + "," + encodeURIComponent(blob));
}
}
// Blob but not URL support:
reader = new FileReader();
reader.onload = function (e) {
saver(this.result);
};
reader.readAsDataURL(blob);
}
return true;
}; /* end download() */
}));