|
@@ -0,0 +1,253 @@
|
|
|
|
+/*! FileSaver.js
|
|
|
|
+ * A saveAs() FileSaver implementation.
|
|
|
|
+ * 2014-01-24
|
|
|
|
+ *
|
|
|
|
+ * By Eli Grey, http://eligrey.com
|
|
|
|
+ * License: X11/MIT
|
|
|
|
+ * See 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 saveAs = saveAs
|
|
|
|
+ // IE 10+ (native saveAs)
|
|
|
|
+ || (typeof navigator !== "undefined" &&
|
|
|
|
+ navigator.msSaveOrOpenBlob && navigator.msSaveOrOpenBlob.bind(navigator))
|
|
|
|
+ // Everyone else
|
|
|
|
+ || (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 BlobBuilder.js hasn't overridden it yet
|
|
|
|
+ , get_URL = function () {
|
|
|
|
+ return view.URL || view.webkitURL || view;
|
|
|
|
+ }
|
|
|
|
+ , URL = view.URL || view.webkitURL || view
|
|
|
|
+ , save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a")
|
|
|
|
+ , can_use_save_link = !view.externalHost && "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
|
|
|
|
+ , deletion_queue = []
|
|
|
|
+ , process_deletion_queue = function () {
|
|
|
|
+ var i = deletion_queue.length;
|
|
|
|
+ while (i--) {
|
|
|
|
+ var file = deletion_queue[i];
|
|
|
|
+ if (typeof file === "string") { // file is an object URL
|
|
|
|
+ URL.revokeObjectURL(file);
|
|
|
|
+ } else { // file is a File
|
|
|
|
+ file.remove();
|
|
|
|
+ }
|
|
|
|
+ }
|
|
|
|
+ deletion_queue.length = 0; // clear queue
|
|
|
|
+ }
|
|
|
|
+ , 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);
|
|
|
|
+ }
|
|
|
|
+ }
|
|
|
|
+ }
|
|
|
|
+ }
|
|
|
|
+ , FileSaver = function (blob, name) {
|
|
|
|
+ // First try a.download, then web filesystem, then object URLs
|
|
|
|
+ var
|
|
|
|
+ filesaver = this
|
|
|
|
+ , type = blob.type
|
|
|
|
+ , blob_changed = false
|
|
|
|
+ , object_url
|
|
|
|
+ , target_view
|
|
|
|
+ , get_object_url = function () {
|
|
|
|
+ var object_url = get_URL().createObjectURL(blob);
|
|
|
|
+ deletion_queue.push(object_url);
|
|
|
|
+ return object_url;
|
|
|
|
+ }
|
|
|
|
+ , 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_object_url(blob);
|
|
|
|
+ }
|
|
|
|
+ if (target_view) {
|
|
|
|
+ target_view.location.href = object_url;
|
|
|
|
+ } else {
|
|
|
|
+ window.open(object_url, "_blank");
|
|
|
|
+ }
|
|
|
|
+ filesaver.readyState = filesaver.DONE;
|
|
|
|
+ dispatch_all();
|
|
|
|
+ }
|
|
|
|
+ , 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_object_url(blob);
|
|
|
|
+ // FF for Android has a nasty garbage collection mechanism
|
|
|
|
+ // that turns all objects that are not pure javascript into 'deadObject'
|
|
|
|
+ // this means `doc` and `save_link` are unusable and need to be recreated
|
|
|
|
+ // `view` is usable though:
|
|
|
|
+ doc = view.document;
|
|
|
|
+ save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a");
|
|
|
|
+ save_link.href = object_url;
|
|
|
|
+ save_link.download = name;
|
|
|
|
+ var event = doc.createEvent("MouseEvents");
|
|
|
|
+ event.initMouseEvent(
|
|
|
|
+ "click", true, false, view, 0, 0, 0, 0, 0
|
|
|
|
+ , false, false, false, false, 0, null
|
|
|
|
+ );
|
|
|
|
+ save_link.dispatchEvent(event);
|
|
|
|
+ filesaver.readyState = filesaver.DONE;
|
|
|
|
+ dispatch_all();
|
|
|
|
+ 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
|
|
|
|
+ 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();
|
|
|
|
+ deletion_queue.push(file);
|
|
|
|
+ filesaver.readyState = filesaver.DONE;
|
|
|
|
+ dispatch(filesaver, "writeend", event);
|
|
|
|
+ };
|
|
|
|
+ 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);
|
|
|
|
+ }
|
|
|
|
+ ;
|
|
|
|
+ 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;
|
|
|
|
+
|
|
|
|
+ view.addEventListener("unload", process_deletion_queue, false);
|
|
|
|
+ saveAs.unload = function () {
|
|
|
|
+ process_deletion_queue();
|
|
|
|
+ view.removeEventListener("unload", process_deletion_queue, false);
|
|
|
|
+ };
|
|
|
|
+ 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 !== null) {
|
|
|
|
+ module.exports = saveAs;
|
|
|
|
+} else if ((typeof define !== "undefined" && define !== null) && (define.amd != null)) {
|
|
|
|
+ define([], function () {
|
|
|
|
+ return saveAs;
|
|
|
|
+ });
|
|
|
|
+}
|