From 96ad657bf94190481e130ecbe7b803688357677d Mon Sep 17 00:00:00 2001 From: Isaiah Odhner Date: Fri, 30 Jul 2021 03:29:44 -0400 Subject: [PATCH] Update FileSaver.js not for any particular fix --- lib/FileSaver.js | 425 ++++++++++++++++++++--------------------------- 1 file changed, 180 insertions(+), 245 deletions(-) diff --git a/lib/FileSaver.js b/lib/FileSaver.js index 11081a8..54fc090 100644 --- a/lib/FileSaver.js +++ b/lib/FileSaver.js @@ -1,253 +1,188 @@ -/* FileSaver.js - * A saveAs() FileSaver implementation. - * 2015-05-07.2 - * - * By Eli Grey, http://eligrey.com - * License: X11/MIT - * See https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md - */ +(function (global, factory) { + if (typeof define === "function" && define.amd) { + define([], factory); + } else if (typeof exports !== "undefined") { + factory(); + } else { + var mod = { + exports: {} + }; + factory(); + global.FileSaver = mod.exports; + } +})(this, function () { + "use strict"; -/*global self */ -/*jslint bitwise: true, indent: 4, laxbreak: true, laxcomma: true, smarttabs: true, plusplus: true */ + /* + * FileSaver.js + * A saveAs() FileSaver implementation. + * + * By Eli Grey, http://eligrey.com + * + * License : https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md (MIT) + * source : http://purl.eligrey.com/github/FileSaver.js + */ + // The one and only way of getting global scope in all environments + // https://stackoverflow.com/q/3277182/1008999 + 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; -/*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */ + function bom(blob, opts) { + if (typeof opts === 'undefined') opts = { + autoBom: false + };else if (typeof opts !== 'object') { + console.warn('Deprecated: Expected third argument to be a object'); + opts = { + autoBom: !opts + }; + } // prepend BOM for UTF-8 XML and text/* types (including HTML) + // note: your browser will automatically convert UTF-16 U+FEFF to EF BB BF -var saveAs = saveAs || (function(view) { - "use strict"; - // IE <10 is explicitly unsupported - if (typeof navigator !== "undefined" && /MSIE [1-9]\./.test(navigator.userAgent)) { - return; - } - var - doc = view.document - // only get URL when necessary in case Blob.js hasn't overridden it yet - , get_URL = function() { - return view.URL || view.webkitURL || view; - } - , save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a") - , can_use_save_link = "download" in save_link - , click = function(node) { - var event = doc.createEvent("MouseEvents"); - event.initMouseEvent( - "click", true, false, view, 0, 0, 0, 0, 0 - , false, false, false, false, 0, null - ); - node.dispatchEvent(event); - } - , webkit_req_fs = view.webkitRequestFileSystem - , req_fs = view.requestFileSystem || webkit_req_fs || view.mozRequestFileSystem - , throw_outside = function(ex) { - (view.setImmediate || view.setTimeout)(function() { - throw ex; - }, 0); - } - , force_saveable_type = "application/octet-stream" - , fs_min_size = 0 - // See https://code.google.com/p/chromium/issues/detail?id=375297#c7 and - // https://github.com/eligrey/FileSaver.js/commit/485930a#commitcomment-8768047 - // for the reasoning behind the timeout and revocation flow - , arbitrary_revoke_timeout = 500 // in ms - , revoke = function(file) { - var revoker = function() { - if (typeof file === "string") { // file is an object URL - get_URL().revokeObjectURL(file); - } else { // file is a File - file.remove(); - } - }; - if (view.chrome) { - revoker(); - } else { - setTimeout(revoker, arbitrary_revoke_timeout); - } - } - , dispatch = function(filesaver, event_types, event) { - event_types = [].concat(event_types); - var i = event_types.length; - while (i--) { - var listener = filesaver["on" + event_types[i]]; - if (typeof listener === "function") { - try { - listener.call(filesaver, event || filesaver); - } catch (ex) { - throw_outside(ex); - } - } - } - } - , auto_bom = function(blob) { - // prepend BOM for UTF-8 XML and text/* types (including HTML) - if (/^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(blob.type)) { - return new Blob(["\ufeff", blob], {type: blob.type}); - } - return blob; - } - , FileSaver = function(blob, name) { - blob = auto_bom(blob); - // First try a.download, then web filesystem, then object URLs - var - filesaver = this - , type = blob.type - , blob_changed = false - , object_url - , target_view - , dispatch_all = function() { - dispatch(filesaver, "writestart progress write writeend".split(" ")); - } - // on any filesys errors revert to saving with object URLs - , fs_error = function() { - // don't create more object URLs than needed - if (blob_changed || !object_url) { - object_url = get_URL().createObjectURL(blob); - } - if (target_view) { - target_view.location.href = object_url; - } else { - var new_tab = view.open(object_url, "_blank"); - if (new_tab == undefined && typeof safari !== "undefined") { - //Apple do not allow window.open, see http://bit.ly/1kZffRI - view.location.href = object_url - } - } - filesaver.readyState = filesaver.DONE; - dispatch_all(); - revoke(object_url); - } - , abortable = function(func) { - return function() { - if (filesaver.readyState !== filesaver.DONE) { - return func.apply(this, arguments); - } - }; - } - , create_if_not_found = {create: true, exclusive: false} - , slice - ; - filesaver.readyState = filesaver.INIT; - if (!name) { - name = "download"; - } - if (can_use_save_link) { - object_url = get_URL().createObjectURL(blob); - save_link.href = object_url; - save_link.download = name; - click(save_link); - filesaver.readyState = filesaver.DONE; - dispatch_all(); - revoke(object_url); - return; - } - // Object and web filesystem URLs have a problem saving in Google Chrome when - // viewed in a tab, so I force save with application/octet-stream - // http://code.google.com/p/chromium/issues/detail?id=91158 - // Update: Google errantly closed 91158, I submitted it again: - // https://code.google.com/p/chromium/issues/detail?id=389642 - if (view.chrome && type && type !== force_saveable_type) { - slice = blob.slice || blob.webkitSlice; - blob = slice.call(blob, 0, blob.size, force_saveable_type); - blob_changed = true; - } - // Since I can't be sure that the guessed media type will trigger a download - // in WebKit, I append .download to the filename. - // https://bugs.webkit.org/show_bug.cgi?id=65440 - if (webkit_req_fs && name !== "download") { - name += ".download"; - } - if (type === force_saveable_type || webkit_req_fs) { - target_view = view; - } - if (!req_fs) { - fs_error(); - return; - } - fs_min_size += blob.size; - req_fs(view.TEMPORARY, fs_min_size, abortable(function(fs) { - fs.root.getDirectory("saved", create_if_not_found, abortable(function(dir) { - var save = function() { - dir.getFile(name, create_if_not_found, abortable(function(file) { - file.createWriter(abortable(function(writer) { - writer.onwriteend = function(event) { - target_view.location.href = file.toURL(); - filesaver.readyState = filesaver.DONE; - dispatch(filesaver, "writeend", event); - revoke(file); - }; - writer.onerror = function() { - var error = writer.error; - if (error.code !== error.ABORT_ERR) { - fs_error(); - } - }; - "writestart progress write abort".split(" ").forEach(function(event) { - writer["on" + event] = filesaver["on" + event]; - }); - writer.write(blob); - filesaver.abort = function() { - writer.abort(); - filesaver.readyState = filesaver.DONE; - }; - filesaver.readyState = filesaver.WRITING; - }), fs_error); - }), fs_error); - }; - dir.getFile(name, {create: false}, abortable(function(file) { - // delete file if it already exists - file.remove(); - save(); - }), abortable(function(ex) { - if (ex.code === ex.NOT_FOUND_ERR) { - save(); - } else { - fs_error(); - } - })); - }), fs_error); - }), fs_error); - } - , FS_proto = FileSaver.prototype - , saveAs = function(blob, name) { - return new FileSaver(blob, name); - } - ; - // IE 10+ (native saveAs) - if (typeof navigator !== "undefined" && navigator.msSaveOrOpenBlob) { - return function(blob, name) { - return navigator.msSaveOrOpenBlob(auto_bom(blob), name); - }; - } + if (opts.autoBom && /^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(blob.type)) { + return new Blob([String.fromCharCode(0xFEFF), blob], { + type: blob.type + }); + } - FS_proto.abort = function() { - var filesaver = this; - filesaver.readyState = filesaver.DONE; - dispatch(filesaver, "abort"); - }; - FS_proto.readyState = FS_proto.INIT = 0; - FS_proto.WRITING = 1; - FS_proto.DONE = 2; + return blob; + } - FS_proto.error = - FS_proto.onwritestart = - FS_proto.onprogress = - FS_proto.onwrite = - FS_proto.onabort = - FS_proto.onerror = - FS_proto.onwriteend = - null; + function download(url, name, opts) { + var xhr = new XMLHttpRequest(); + xhr.open('GET', url); + xhr.responseType = 'blob'; - return saveAs; -}( - typeof self !== "undefined" && self - || typeof window !== "undefined" && window - || this.content -)); -// `self` is undefined in Firefox for Android content script context -// while `this` is nsIContentFrameMessageManager -// with an attribute `content` that corresponds to the window + xhr.onload = function () { + saveAs(xhr.response, name, opts); + }; -if (typeof module !== "undefined" && module.exports) { - module.exports.saveAs = saveAs; -} else if ((typeof define !== "undefined" && define !== null) && (define.amd != null)) { - define([], function() { - return saveAs; + xhr.onerror = function () { + console.error('could not download file'); + }; + + xhr.send(); + } + + function corsEnabled(url) { + var xhr = new XMLHttpRequest(); // use sync to avoid popup blocker + + xhr.open('HEAD', url, false); + + try { + xhr.send(); + } catch (e) {} + + return xhr.status >= 200 && xhr.status <= 299; + } // `a.click()` doesn't work for all browsers (#465) + + + function click(node) { + try { + node.dispatchEvent(new MouseEvent('click')); + } catch (e) { + var evt = document.createEvent('MouseEvents'); + evt.initMouseEvent('click', true, true, window, 0, 0, 0, 80, 20, false, false, false, false, 0, null); + node.dispatchEvent(evt); + } + } // Detect WebView inside a native macOS app by ruling out all browsers + // We just need to check for 'Safari' because all other browsers (besides Firefox) include that too + // https://www.whatismybrowser.com/guides/the-latest-user-agent/macos + + + var isMacOSWebView = /Macintosh/.test(navigator.userAgent) && /AppleWebKit/.test(navigator.userAgent) && !/Safari/.test(navigator.userAgent); + var saveAs = _global.saveAs || ( // probably in some web worker + typeof window !== 'object' || window !== _global ? function saveAs() {} + /* noop */ + // Use download attribute first if possible (#193 Lumia mobile) unless this is a macOS WebView + : 'download' in HTMLAnchorElement.prototype && !isMacOSWebView ? function saveAs(blob, name, opts) { + var URL = _global.URL || _global.webkitURL; + var a = document.createElement('a'); + name = name || blob.name || 'download'; + a.download = name; + a.rel = 'noopener'; // tabnabbing + // TODO: detect chrome extensions & packaged apps + // a.target = '_blank' + + if (typeof blob === 'string') { + // Support regular links + a.href = blob; + + if (a.origin !== location.origin) { + corsEnabled(a.href) ? download(blob, name, opts) : click(a, a.target = '_blank'); + } else { + click(a); + } + } else { + // Support blobs + a.href = URL.createObjectURL(blob); + setTimeout(function () { + URL.revokeObjectURL(a.href); + }, 4E4); // 40s + + setTimeout(function () { + click(a); + }, 0); + } + } // Use msSaveOrOpenBlob as a second approach + : 'msSaveOrOpenBlob' in navigator ? function saveAs(blob, name, opts) { + name = name || blob.name || 'download'; + + if (typeof blob === 'string') { + if (corsEnabled(blob)) { + download(blob, name, opts); + } else { + var a = document.createElement('a'); + a.href = blob; + a.target = '_blank'; + setTimeout(function () { + click(a); + }); + } + } else { + navigator.msSaveOrOpenBlob(bom(blob, opts), name); + } + } // Fallback to using FileReader and a popup + : function saveAs(blob, name, opts, popup) { + // Open a popup immediately do go around popup blocker + // Mostly only available on user interaction and the fileReader is async so... + popup = popup || open('', '_blank'); + + if (popup) { + popup.document.title = popup.document.body.innerText = 'downloading...'; + } + + if (typeof blob === 'string') return download(blob, name, opts); + var force = blob.type === 'application/octet-stream'; + + var isSafari = /constructor/i.test(_global.HTMLElement) || _global.safari; + + var isChromeIOS = /CriOS\/[\d]+/.test(navigator.userAgent); + + if ((isChromeIOS || force && isSafari || isMacOSWebView) && typeof FileReader !== 'undefined') { + // Safari doesn't allow downloading of blob URLs + var reader = new FileReader(); + + reader.onloadend = function () { + var url = reader.result; + url = isChromeIOS ? url : url.replace(/^data:[^;]*;/, 'data:attachment/file;'); + if (popup) popup.location.href = url;else location = url; + popup = null; // reverse-tabnabbing #460 + }; + + reader.readAsDataURL(blob); + } else { + var URL = _global.URL || _global.webkitURL; + var url = URL.createObjectURL(blob); + if (popup) popup.location = url;else location.href = url; + popup = null; // reverse-tabnabbing #460 + + setTimeout(function () { + URL.revokeObjectURL(url); + }, 4E4); // 40s + } }); -} \ No newline at end of file + _global.saveAs = saveAs.saveAs = saveAs; + + if (typeof module !== 'undefined') { + module.exports = saveAs; + } +});