189 lines
6.0 KiB
JavaScript
189 lines
6.0 KiB
JavaScript
(function (global, factory) {
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if (typeof define === "function" && define.amd) {
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define([], factory);
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} else if (typeof exports !== "undefined") {
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factory();
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} else {
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var mod = {
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exports: {}
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};
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factory();
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global.FileSaver = mod.exports;
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}
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})(this, function () {
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"use strict";
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/*
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* FileSaver.js
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* A saveAs() FileSaver implementation.
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*
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* By Eli Grey, http://eligrey.com
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*
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* License : https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md (MIT)
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* source : http://purl.eligrey.com/github/FileSaver.js
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*/
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// The one and only way of getting global scope in all environments
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// https://stackoverflow.com/q/3277182/1008999
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var _global = typeof window === 'object' && window.window === window ? window : typeof self === 'object' && self.self === self ? self : typeof global === 'object' && global.global === global ? global : void 0;
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function bom(blob, opts) {
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if (typeof opts === 'undefined') opts = {
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autoBom: false
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};else if (typeof opts !== 'object') {
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console.warn('Deprecated: Expected third argument to be a object');
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opts = {
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autoBom: !opts
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};
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} // prepend BOM for UTF-8 XML and text/* types (including HTML)
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// note: your browser will automatically convert UTF-16 U+FEFF to EF BB BF
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if (opts.autoBom && /^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(blob.type)) {
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return new Blob([String.fromCharCode(0xFEFF), blob], {
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type: blob.type
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});
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}
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return blob;
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}
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function download(url, name, opts) {
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var xhr = new XMLHttpRequest();
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xhr.open('GET', url);
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xhr.responseType = 'blob';
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xhr.onload = function () {
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saveAs(xhr.response, name, opts);
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};
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xhr.onerror = function () {
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console.error('could not download file');
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};
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xhr.send();
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}
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function corsEnabled(url) {
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var xhr = new XMLHttpRequest(); // use sync to avoid popup blocker
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xhr.open('HEAD', url, false);
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try {
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xhr.send();
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} catch (e) {}
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return xhr.status >= 200 && xhr.status <= 299;
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} // `a.click()` doesn't work for all browsers (#465)
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function click(node) {
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try {
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node.dispatchEvent(new MouseEvent('click'));
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} catch (e) {
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var evt = document.createEvent('MouseEvents');
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evt.initMouseEvent('click', true, true, window, 0, 0, 0, 80, 20, false, false, false, false, 0, null);
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node.dispatchEvent(evt);
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}
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} // Detect WebView inside a native macOS app by ruling out all browsers
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// We just need to check for 'Safari' because all other browsers (besides Firefox) include that too
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// https://www.whatismybrowser.com/guides/the-latest-user-agent/macos
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var isMacOSWebView = _global.navigator && /Macintosh/.test(navigator.userAgent) && /AppleWebKit/.test(navigator.userAgent) && !/Safari/.test(navigator.userAgent);
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var saveAs = _global.saveAs || ( // probably in some web worker
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typeof window !== 'object' || window !== _global ? function saveAs() {}
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/* noop */
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// Use download attribute first if possible (#193 Lumia mobile) unless this is a macOS WebView
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: 'download' in HTMLAnchorElement.prototype && !isMacOSWebView ? function saveAs(blob, name, opts) {
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var URL = _global.URL || _global.webkitURL;
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var a = document.createElement('a');
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name = name || blob.name || 'download';
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a.download = name;
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a.rel = 'noopener'; // tabnabbing
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// TODO: detect chrome extensions & packaged apps
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// a.target = '_blank'
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if (typeof blob === 'string') {
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// Support regular links
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a.href = blob;
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if (a.origin !== location.origin) {
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corsEnabled(a.href) ? download(blob, name, opts) : click(a, a.target = '_blank');
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} else {
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click(a);
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}
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} else {
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// Support blobs
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a.href = URL.createObjectURL(blob);
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setTimeout(function () {
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URL.revokeObjectURL(a.href);
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}, 4E4); // 40s
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setTimeout(function () {
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click(a);
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}, 0);
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}
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} // Use msSaveOrOpenBlob as a second approach
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: 'msSaveOrOpenBlob' in navigator ? function saveAs(blob, name, opts) {
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name = name || blob.name || 'download';
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if (typeof blob === 'string') {
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if (corsEnabled(blob)) {
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download(blob, name, opts);
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} else {
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var a = document.createElement('a');
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a.href = blob;
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a.target = '_blank';
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setTimeout(function () {
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click(a);
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});
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}
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} else {
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navigator.msSaveOrOpenBlob(bom(blob, opts), name);
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}
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} // Fallback to using FileReader and a popup
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: function saveAs(blob, name, opts, popup) {
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// Open a popup immediately do go around popup blocker
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// Mostly only available on user interaction and the fileReader is async so...
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popup = popup || open('', '_blank');
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if (popup) {
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popup.document.title = popup.document.body.innerText = 'downloading...';
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}
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if (typeof blob === 'string') return download(blob, name, opts);
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var force = blob.type === 'application/octet-stream';
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var isSafari = /constructor/i.test(_global.HTMLElement) || _global.safari;
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var isChromeIOS = /CriOS\/[\d]+/.test(navigator.userAgent);
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if ((isChromeIOS || force && isSafari || isMacOSWebView) && typeof FileReader !== 'undefined') {
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// Safari doesn't allow downloading of blob URLs
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var reader = new FileReader();
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reader.onloadend = function () {
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var url = reader.result;
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url = isChromeIOS ? url : url.replace(/^data:[^;]*;/, 'data:attachment/file;');
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if (popup) popup.location.href = url;else location = url;
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popup = null; // reverse-tabnabbing #460
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};
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reader.readAsDataURL(blob);
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} else {
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var URL = _global.URL || _global.webkitURL;
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var url = URL.createObjectURL(blob);
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if (popup) popup.location = url;else location.href = url;
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popup = null; // reverse-tabnabbing #460
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setTimeout(function () {
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URL.revokeObjectURL(url);
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}, 4E4); // 40s
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}
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});
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_global.saveAs = saveAs.saveAs = saveAs;
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if (typeof module !== 'undefined') {
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module.exports = saveAs;
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}
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});
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