/** * This singleton has methods for file manipulation. * * It allows file saving using browser features or remote server calls. * * Call {@link #saveAs} to save text files or {@link #saveBinaryAs} to save binary files. * If the browser doesn't support file saving then those functions will upload * the file content to the server address provided in {@link #url}. * * The script from the default {@link #url} has a 5Mb upload limitation for file content. * In the "server" folder of the `exporter` package there are examples of * scripts that could be used to implement an in-house server. * * **Note:** When using server side download browser pop-ups should NOT be blocked. */Ext.define('Ext.exporter.File', { singleton: true, requires: [ 'Ext.promise.Promise', 'Ext.Deferred' ], textPopupWait: 'You may close this window after the file is downloaded!', textPopupBlocker: 'The file was not saved because pop-up blocker might be enabled! Please check your browser settings.', /** * @property {String} url * * Address of the server that supports file downloading. Check out the scripts * from the "server" folder of the `exporter` package if an in-house server * needs to be implemented. */ url: 'https://exporter.sencha.com', /** * @property {Boolean} forceDownload * * Set to `true` to always download files from the server {@link #url} instead of saving * files using browser features. */ forceDownload: false, /** * Check if we need to use a pop-up window to download the file. * * @return {Boolean} Returns true if a pop-up window is needed to download files * @private */ requiresPopup: function(){ var pt = Ext.platformTags; //Safari and Blob are not friends yet return this.forceDownload || Ext.isSafari || pt.phone || pt.tablet; }, /** * This function tries to open a new pop-up window that will be used to * download the file using a remote server call. * * This function needs to be called after the end-user clicked a button and it should * happen in the same cycle as the user interaction otherwise the browser will block it. * * See http://stackoverflow.com/a/2587692 for more details. * * @param {Boolean} binary Set to true if the file to be downloaded is binary */ initializePopup: function(binary){ var me = this, required = me.requiresPopup(), win; if(!required && binary){ required = !me.saveBlobAs; } me.popup = null; if(required){ win = window.open('', '_blank'); if(win){ me.popup = win; win.document.write(Ext.dom.Helper.markup({ tag: 'html', children: [{ tag: 'head' }, { tag: 'body', children: [{ tag: 'p', html: me.textPopupWait }] }] })); } } }, /** * Save a binary file locally using either [Blob][1] or server side script. * * [1]: https://developer.mozilla.org/en/docs/Web/API/Blob * * Browser compatibility when using [Blob][1]: * * - Firefox 20+: max blob size 800 MB * - Chrome: max blob size 500 MB * - Chrome for Android: max blob size 500 MB * - Edge: max blob size n/a * - IE 10+: max blob size 600 MB * - Opera 15+: max blob size 500 MB * * For all other browsers it falls back to server side script which means that * the file content is uploaded to the server script defined in {@link #url} and comes * back to the browser as a file download. * * @param {String} content File content * @param {String} filename Name of the file including the extension * @param {String} [charset='UTF-8'] File's charset * @param {String} [mimeType='application/octet-stream'] Mime type of the file * @return {Ext.promise.Promise} */ saveBinaryAs: function(content, filename, charset, mimeType){ var me = this, saveAs = me.downloadBinaryAs; if(!me.requiresPopup() && me.saveBlobAs){ saveAs = me.saveBlobAs; } // The method saveBlobAs exists only if the browser supports Blob return saveAs.call(me, content, filename, charset, mimeType); }, /** * Save a binary file using a server side script. The file content, file name, charset and * mime-type are uploaded to the server side script and a download is forced from the server. * * This method can be used when the browser doesn't support [Blobs][1]. * * [1]: https://developer.mozilla.org/en/docs/Web/API/Blob * * **Note** Browsers pop-ups should NOT be blocked for this feature to work as expected. * * @param {String} content File content * @param {String} filename Name of the file including the extension * @param {String} [charset='UTF-8'] File's charset * @param {String} [mimeType='application/octet-stream'] Mime type of the file * @return {Ext.promise.Promise} */ downloadBinaryAs: function(content, filename, charset, mimeType){ var deferred = new Ext.Deferred(), markup, win; //<debug> if (!this.url) { Ext.raise('Cannot download file since no URL was defined!'); return deferred.promise; } //</debug> markup = Ext.dom.Helper.markup({ tag: 'html', children: [ {tag: 'head'}, { tag: 'body', children: [ { tag: 'form', method: 'POST', action: this.url, children: [{ tag: 'input', type: 'hidden', name: 'content', value: Ext.util.Base64.encode(content) }, { tag: 'input', type: 'hidden', name: 'filename', value: filename }, { tag: 'input', type: 'hidden', name: 'charset', value: charset || 'UTF-8' }, { tag: 'input', type: 'hidden', name: 'mime', value: mimeType || 'application/octet-stream' }] }, { tag: 'script', type: 'text/javascript', children: 'document.getElementsByTagName("form")[0].submit();' } ] } ] }); win = this.popup || window.open('', '_blank'); if (win) { win.document.write(markup); deferred.resolve(); } else { deferred.reject(this.textPopupBlocker); } this.popup = null; return deferred.promise; } /** * Save a text file locally using the content and name provided. * * Browser compatibility: * * - Firefox 20+: max blob size 800 MB * - Chrome: max blob size 500 MB * - Chrome for Android: max blob size 500 MB * - Edge: max blob size n/a * - IE 10+: max blob size 600 MB * - IE < 10: Files are saved as text/html and max file size n/a * - Opera 15+: max blob size 500 MB * - Opera < 15: max blob size n/a * - Safari 6.1+: max blob size n/a; Blobs may be opened instead of saved sometimes—you may have * to direct your Safari users to manually press ⌘+S to save the file after it is opened. * Using the application/octet-stream MIME type to force downloads can cause issues in Safari. * - Safari < 6: max blob size n/a * * @method saveAs * @param {String} content File content * @param {String} filename Name of the file including the extension * @param {String} [charset='UTF-8'] File's charset * @param {String} [mimeType='application/octet-stream'] Mime type of the file * @return {Ext.promise.Promise} */ /** * Save a binary file locally using [Blobs][1]. * * Browser compatibility: * * - Firefox 20+: max blob size 800 MB * - Chrome: max blob size 500 MB * - Chrome for Android: max blob size 500 MB * - Edge: max blob size n/a * - IE 10+: max blob size 600 MB * - Opera 15+: max blob size 500 MB * * [1]: https://developer.mozilla.org/en/docs/Web/API/Blob * * @method saveBlobAs * @param {String} content File content * @param {String} filename Name of the file including the extension * @param {String} [charset='UTF-8'] File's charset * @param {String} [mimeType='application/octet-stream'] Mime type of the file * @return {Ext.promise.Promise} * @private */ }, function(File){ /* FileSaver.js * A saveAs() & saveTextAs() FileSaver implementation. * 1.1.20160328 * * Modify by Brian Chen * By Eli Grey, http://eligrey.com * License: MIT * See https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md */ /*global self */ /*jslint bitwise: true, indent: 4, laxbreak: true, laxcomma: true, smarttabs: true, plusplus: true */ /*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */ var navigator = window.navigator, saveAs = window.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 = new MouseEvent("click"); node.dispatchEvent(event); } , is_safari = /Version\/[\d\.]+.*Safari/.test(navigator.userAgent) , 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 // the Blob API is fundamentally broken as there is no "downloadfinished" event to subscribe to , arbitrary_revoke_timeout = 1000 * 40 // 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(); } }; /* // Take note W3C: var uri = typeof file === "string" ? file : file.toURL() , revoker = function(evt) { // idealy DownloadFinishedEvent.data would be the URL requested if (evt.data === uri) { if (typeof file === "string") { // file is an object URL get_URL().revokeObjectURL(file); } else { // file is a File file.remove(); } } } ; view.addEventListener("downloadfinished", revoker); */ 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, no_auto_bom) { if (!no_auto_bom) { 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() { if (target_view && is_safari && typeof FileReader !== "undefined") { // Safari doesn't allow downloading of blob urls var reader = new FileReader(); reader.onloadend = function() { var base64Data = reader.result; target_view.location.href = "data:attachment/file" + base64Data.slice(base64Data.search(/[,;]/)); filesaver.readyState = filesaver.DONE; dispatch_all(); }; reader.readAsDataURL(blob); filesaver.readyState = filesaver.INIT; return; } // 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 && is_safari) { //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); setTimeout(function() { save_link.href = object_url; save_link.download = name; click(save_link); dispatch_all(); revoke(object_url); filesaver.readyState = filesaver.DONE; }); 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, no_auto_bom) { return new FileSaver(blob, name, no_auto_bom); } ; // IE 10+ (native saveAs) if (typeof navigator !== "undefined" && navigator.msSaveOrOpenBlob) { return function(blob, name, no_auto_bom) { if (!no_auto_bom) { blob = auto_bom(blob); } return navigator.msSaveOrOpenBlob(blob, name || "download"); }; } 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; FS_proto.error = FS_proto.onwritestart = FS_proto.onprogress = FS_proto.onwrite = FS_proto.onabort = FS_proto.onerror = FS_proto.onwriteend = null; 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 if (typeof module !== "undefined" && module.exports) { module.exports.saveAs = saveAs; } else if ((typeof define !== "undefined" && define !== null) && (define.amd !== null)) { define([], function() { return saveAs; }); } var saveTextAs = window.saveTextAs || (function (textContent, fileName, charset) { fileName = fileName || 'download.txt'; charset = charset || 'utf-8'; textContent = (textContent || '').replace(/\r?\n/g, "\r\n"); if (saveAs && Blob) { var blob = new Blob([textContent], { type: "text/plain;charset=" + charset }); saveAs(blob, fileName); return true; } else {//IE9- var saveTxtWindow = window.frames.saveTxtWindow; if (!saveTxtWindow) { saveTxtWindow = document.createElement('iframe'); saveTxtWindow.id = 'saveTxtWindow'; saveTxtWindow.style.display = 'none'; document.body.insertBefore(saveTxtWindow, null); saveTxtWindow = window.frames.saveTxtWindow; if (!saveTxtWindow) { saveTxtWindow = File.popup || window.open('', '_temp', 'width=100,height=100'); if (!saveTxtWindow) { //window.alert('Sorry, download file could not be created.'); return false; } } } var doc = saveTxtWindow.document; doc.open('text/html', 'replace'); doc.charset = charset; // if the textContent is a full html page then we need to update the entire document not only the body doc.write(textContent); doc.close(); var retValue = doc.execCommand('SaveAs', null, fileName); saveTxtWindow.close(); return retValue; } }); File.saveAs = function(content, filename, charset, mimeType){ var deferred; if(this.requiresPopup()){ return this.downloadBinaryAs(content, filename, charset || 'UTF-8', mimeType || 'text/plain'); }else{ deferred = new Ext.Deferred(); if(saveTextAs(content, filename, charset)) { deferred.resolve(); }else{ deferred.reject(); } return deferred.promise; } }; if(saveAs && Blob){ File.saveBlobAs = function(textContent, fileName, charset, mimeType){ var deferred = new Ext.Deferred(); var uint8 = new Uint8Array(textContent.length), len = uint8.length, bType = {type: mimeType || 'application/octet-stream'}, blob, i; for (i = 0; i < len; i++) { uint8[i] = textContent.charCodeAt(i); } blob = new Blob([uint8], bType); saveAs(blob, fileName); deferred.resolve(); return deferred.promise; }; }});