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