/* FileSaver.js
* A saveAs() FileSaver implementation.
* 1.1.20151003
*
* 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 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 = 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
// 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, 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);
save_link.href = object_url;
save_link.download = name;
setTimeout(function () {
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;
});
}