2 * A Blob implementation.
5 * By Eli Grey, http://eligrey.com
6 * By Devin Samarin, https://github.com/eboyjr
11 /*global self, unescape */
12 /*jslint bitwise: true, regexp: true, confusion: true, es5: true, vars: true, white: true,
15 /*! @source http://purl.eligrey.com/github/Blob.js/blob/master/Blob.js */
17 if (typeof Blob !== "function" || typeof URL === "undefined")
18 if (typeof Blob === "function" && typeof webkitURL !== "undefined") self.URL = webkitURL;
19 else var Blob = (function (view) {
22 var BlobBuilder = view.BlobBuilder || view.WebKitBlobBuilder || view.MozBlobBuilder || view.MSBlobBuilder || (function(view) {
24 get_class = function(object) {
25 return Object.prototype.toString.call(object).match(/^\[object\s(.*)\]$/)[1];
27 , FakeBlobBuilder = function BlobBuilder() {
30 , FakeBlob = function Blob(data, type, encoding) {
32 this.size = data.length;
34 this.encoding = encoding;
36 , FBB_proto = FakeBlobBuilder.prototype
37 , FB_proto = FakeBlob.prototype
38 , FileReaderSync = view.FileReaderSync
39 , FileException = function(type) {
40 this.code = this[this.name = type];
43 "NOT_FOUND_ERR SECURITY_ERR ABORT_ERR NOT_READABLE_ERR ENCODING_ERR "
44 + "NO_MODIFICATION_ALLOWED_ERR INVALID_STATE_ERR SYNTAX_ERR"
46 , file_ex_code = file_ex_codes.length
47 , real_URL = view.URL || view.webkitURL || view
48 , real_create_object_URL = real_URL.createObjectURL
49 , real_revoke_object_URL = real_URL.revokeObjectURL
54 , ArrayBuffer = view.ArrayBuffer
55 , Uint8Array = view.Uint8Array
57 FakeBlob.fake = FB_proto.fake = true;
58 while (file_ex_code--) {
59 FileException.prototype[file_ex_codes[file_ex_code]] = file_ex_code + 1;
61 if (!real_URL.createObjectURL) {
64 URL.createObjectURL = function(blob) {
70 type = "application/octet-stream";
72 if (blob instanceof FakeBlob) {
73 data_URI_header = "data:" + type;
74 if (blob.encoding === "base64") {
75 return data_URI_header + ";base64," + blob.data;
76 } else if (blob.encoding === "URI") {
77 return data_URI_header + "," + decodeURIComponent(blob.data);
79 return data_URI_header + ";base64," + btoa(blob.data);
81 return data_URI_header + "," + encodeURIComponent(blob.data);
83 } else if (real_create_object_URL) {
84 return real_create_object_URL.call(real_URL, blob);
87 URL.revokeObjectURL = function(object_URL) {
88 if (object_URL.substring(0, 5) !== "data:" && real_revoke_object_URL) {
89 real_revoke_object_URL.call(real_URL, object_URL);
92 FBB_proto.append = function(data/*, endings*/) {
94 // decode data to a binary string
95 if (Uint8Array && (data instanceof ArrayBuffer || data instanceof Uint8Array)) {
98 , buf = new Uint8Array(data)
100 , buf_len = buf.length
102 for (; i < buf_len; i++) {
103 str += String.fromCharCode(buf[i]);
106 } else if (get_class(data) === "Blob" || get_class(data) === "File") {
107 if (FileReaderSync) {
108 var fr = new FileReaderSync;
109 bb.push(fr.readAsBinaryString(data));
111 // async FileReader won't work as BlobBuilder is sync
112 throw new FileException("NOT_READABLE_ERR");
114 } else if (data instanceof FakeBlob) {
115 if (data.encoding === "base64" && atob) {
116 bb.push(atob(data.data));
117 } else if (data.encoding === "URI") {
118 bb.push(decodeURIComponent(data.data));
119 } else if (data.encoding === "raw") {
123 if (typeof data !== "string") {
124 data += ""; // convert unsupported types to strings
126 // decode UTF-16 to binary string
127 bb.push(unescape(encodeURIComponent(data)));
130 FBB_proto.getBlob = function(type) {
131 if (!arguments.length) {
134 return new FakeBlob(this.data.join(""), type, "raw");
136 FBB_proto.toString = function() {
137 return "[object BlobBuilder]";
139 FB_proto.slice = function(start, end, type) {
140 var args = arguments.length;
145 this.data.slice(start, args > 1 ? end : this.data.length)
150 FB_proto.toString = function() {
151 return "[object Blob]";
153 return FakeBlobBuilder;
156 return function Blob(blobParts, options) {
157 var type = options ? (options.type || "") : "";
158 var builder = new BlobBuilder();
160 for (var i = 0, len = blobParts.length; i < len; i++) {
161 builder.append(blobParts[i]);
164 return builder.getBlob(type);
168 /*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */
169 var saveAs=saveAs||(navigator.msSaveOrOpenBlob&&navigator.msSaveOrOpenBlob.bind(navigator))||(function(h){"use strict";var r=h.document,l=function(){return h.URL||h.webkitURL||h},e=h.URL||h.webkitURL||h,n=r.createElementNS("http://www.w3.org/1999/xhtml","a"),g=!h.externalHost&&"download" in n,j=function(t){var s=r.createEvent("MouseEvents");s.initMouseEvent("click",true,false,h,0,0,0,0,0,false,false,false,false,0,null);t.dispatchEvent(s)},o=h.webkitRequestFileSystem,p=h.requestFileSystem||o||h.mozRequestFileSystem,m=function(s){(h.setImmediate||h.setTimeout)(function(){throw s},0)},c="application/octet-stream",k=0,b=[],i=function(){var t=b.length;while(t--){var s=b[t];if(typeof s==="string"){e.revokeObjectURL(s)}else{s.remove()}}b.length=0},q=function(t,s,w){s=[].concat(s);var v=s.length;while(v--){var x=t["on"+s[v]];if(typeof x==="function"){try{x.call(t,w||t)}catch(u){m(u)}}}},f=function(t,u){var v=this,B=t.type,E=false,x,w,s=function(){var F=l().createObjectURL(t);b.push(F);return F},A=function(){q(v,"writestart progress write writeend".split(" "))},D=function(){if(E||!x){x=s(t)}if(w){w.location.href=x}else{window.open(x,"_blank")}v.readyState=v.DONE;A()},z=function(F){return function(){if(v.readyState!==v.DONE){return F.apply(this,arguments)}}},y={create:true,exclusive:false},C;v.readyState=v.INIT;if(!u){u="download"}if(g){x=s(t);n.href=x;n.download=u;j(n);v.readyState=v.DONE;A();return}if(h.chrome&&B&&B!==c){C=t.slice||t.webkitSlice;t=C.call(t,0,t.size,c);E=true}if(o&&u!=="download"){u+=".download"}if(B===c||o){w=h}if(!p){D();return}k+=t.size;p(h.TEMPORARY,k,z(function(F){F.root.getDirectory("saved",y,z(function(G){var H=function(){G.getFile(u,y,z(function(I){I.createWriter(z(function(J){J.onwriteend=function(K){w.location.href=I.toURL();b.push(I);v.readyState=v.DONE;q(v,"writeend",K)};J.onerror=function(){var K=J.error;if(K.code!==K.ABORT_ERR){D()}};"writestart progress write abort".split(" ").forEach(function(K){J["on"+K]=v["on"+K]});J.write(t);v.abort=function(){J.abort();v.readyState=v.DONE};v.readyState=v.WRITING}),D)}),D)};G.getFile(u,{create:false},z(function(I){I.remove();H()}),z(function(I){if(I.code===I.NOT_FOUND_ERR){H()}else{D()}}))}),D)}),D)},d=f.prototype,a=function(s,t){return new f(s,t)};d.abort=function(){var s=this;s.readyState=s.DONE;q(s,"abort")};d.readyState=d.INIT=0;d.WRITING=1;d.DONE=2;d.error=d.onwritestart=d.onprogress=d.onwrite=d.onabort=d.onerror=d.onwriteend=null;h.addEventListener("unload",i,false);return a}(self));