6 changed files with 240 additions and 11 deletions
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(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 = /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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