/*! Blob.js v1.1.1
*
* native Blob interface support (polyfill)
*
* By Travis Clarke, https://travismclarke.com
* By Eli Grey, http://eligrey.com
* By Devin Samarin, https://github.com/dsamarin
*
* License: MIT (https://github.com/clarketm/Blob.js/blob/master/LICENSE.md)
*
*/
;(function (root, factory) {
if (typeof exports === 'object' && typeof exports.nodeName !== 'string') {
module.exports = root.document ? factory(root, true) : function (w) {
if (!w.document) {
throw new Error("blobjs requires a window with a document");
}
return factory(w);
};
} else {
factory(root);
}
}(window || this, function (window, noGlobal) {
"use strict";
var is_safari = /^((?!chrome|android).)*safari/i.test(navigator.userAgent);
window.URL = window.URL || window.webkitURL;
if (window.Blob && window.URL && !is_safari) {
try {
new window.Blob;
if (typeof define === "function" && define.amd) {
define("blobjs", [], function () {
return window.Blob;
});
}
return window.Blob;
} catch (e) {
}
}
// Internally we use a BlobBuilder implementation to base Blob off of
// in order to support older browsers that only have BlobBuilder
var BlobBuilder = window.BlobBuilder || window.WebKitBlobBuilder || window.MozBlobBuilder || (function (window) {
var
get_class = function (object) {
return Object.prototype.toString.call(object).match(/^\[object\s(.*)\]$/)[1];
}
, FakeBlobBuilder = function BlobBuilder() {
this.data = [];
}
, FakeBlob = function Blob(data, type, encoding) {
this.data = data;
this.size = data.length;
this.type = type;
this.encoding = encoding;
}
, FBB_proto = FakeBlobBuilder.prototype
, FB_proto = FakeBlob.prototype
, FileReaderSync = window.FileReaderSync
, FileException = function (type) {
this.code = this[this.name = type];
}
, file_ex_codes = (
"NOT_FOUND_ERR SECURITY_ERR ABORT_ERR NOT_READABLE_ERR ENCODING_ERR "
+ "NO_MODIFICATION_ALLOWED_ERR INVALID_STATE_ERR SYNTAX_ERR"
).split(" ")
, file_ex_code = file_ex_codes.length
, real_URL = window.URL || window.webkitURL || window
, real_create_object_URL = real_URL.createObjectURL
, real_revoke_object_URL = real_URL.revokeObjectURL
, URL = real_URL
, btoa = window.btoa
, atob = window.atob
, ArrayBuffer = window.ArrayBuffer
, Uint8Array = window.Uint8Array
, origin = /^[\w-]+:\/*\[?[\w\.:-]+\]?(?::[0-9]+)?/
;
FakeBlob.fake = FB_proto.fake = true;
while (file_ex_code--) {
FileException.prototype[file_ex_codes[file_ex_code]] = file_ex_code + 1;
}
// Polyfill URL
if (!real_URL.createObjectURL) {
URL = window.URL = function (uri) {
var
uri_info = document.createElementNS("http://www.w3.org/1999/xhtml", "a")
, uri_origin
;
uri_info.href = uri;
if (!("origin" in uri_info)) {
if (uri_info.protocol.toLowerCase() === "data:") {
uri_info.origin = null;
} else {
uri_origin = uri.match(origin);
uri_info.origin = uri_origin && uri_origin[1];
}
}
return uri_info;
};
}
URL.createObjectURL = function (blob) {
var
type = blob.type
, data_URI_header
;
if (type === null) {
type = "application/octet-stream";
}
if (blob instanceof FakeBlob) {
data_URI_header = "data:" + type;
if (blob.encoding === "base64") {
return data_URI_header + ";base64," + blob.data;
} else if (blob.encoding === "URI") {
return data_URI_header + "," + decodeURIComponent(blob.data);
}
if (btoa) {
return data_URI_header + ";base64," + btoa(blob.data);
} else {
return data_URI_header + "," + encodeURIComponent(blob.data);
}
} else if (real_create_object_URL) {
return real_create_object_URL.call(real_URL, blob);
}
};
URL.revokeObjectURL = function (object_URL) {
if (object_URL.substring(0, 5) !== "data:" && real_revoke_object_URL) {
real_revoke_object_URL.call(real_URL, object_URL);
}
};
FBB_proto.append = function (data/*, endings*/) {
var bb = this.data;
// decode data to a binary string
if (Uint8Array && (data instanceof ArrayBuffer || data instanceof Uint8Array)) {
var
str = ""
, buf = new Uint8Array(data)
, i = 0
, buf_len = buf.length
;
for (; i < buf_len; i++) {
str += String.fromCharCode(buf[i]);
}
bb.push(str);
} else if (get_class(data) === "Blob" || get_class(data) === "File") {
if (FileReaderSync) {
var fr = new FileReaderSync;
bb.push(fr.readAsBinaryString(data));
} else {
// async FileReader won't work as BlobBuilder is sync
throw new FileException("NOT_READABLE_ERR");
}
} else if (data instanceof FakeBlob) {
if (data.encoding === "base64" && atob) {
bb.push(atob(data.data));
} else if (data.encoding === "URI") {
bb.push(decodeURIComponent(data.data));
} else if (data.encoding === "raw") {
bb.push(data.data);
}
} else {
if (typeof data !== "string") {
data += ""; // convert unsupported types to strings
}
// decode UTF-16 to binary string
bb.push(unescape(encodeURIComponent(data)));
}
};
FBB_proto.getBlob = function (type) {
if (!arguments.length) {
type = null;
}
return new FakeBlob(this.data.join(""), type, "raw");
};
FBB_proto.toString = function () {
return "[object BlobBuilder]";
};
FB_proto.slice = function (start, end, type) {
var args = arguments.length;
if (args < 3) {
type = null;
}
return new FakeBlob(
this.data.slice(start, args > 1 ? end : this.data.length)
, type
, this.encoding
);
};
FB_proto.toString = function () {
return "[object Blob]";
};
FB_proto.close = function () {
this.size = 0;
delete this.data;
};
return FakeBlobBuilder;
}(window));
var Blob = function (blobParts, options) {
var type = options ? (options.type || "") : "";
var builder = new BlobBuilder();
if (blobParts) {
for (var i = 0, len = blobParts.length; i < len; i++) {
if (Uint8Array && blobParts[i] instanceof Uint8Array) {
builder.append(blobParts[i].buffer);
}
else {
builder.append(blobParts[i]);
}
}
}
var blob = builder.getBlob(type);
if (!blob.slice && blob.webkitSlice) {
blob.slice = blob.webkitSlice;
}
return blob;
};
var getPrototypeOf = Object.getPrototypeOf || function (object) {
return object.__proto__;
};
Blob.prototype = getPrototypeOf(new window.Blob());
if (typeof define === "function" && define.amd) {
define("blobjs", [], function () {
return Blob;
});
}
if (typeof noGlobal === 'undefined') {
window.Blob = Blob;
}
return Blob;
}
));