Initial commit
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Eli Grey
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/* BlobBuilder.js
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* A BlobBuilder implementation.
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* 2011-07-13
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*
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* By Eli Grey, http://eligrey.com
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* License: X11/MIT
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* See LICENSE.md
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*/
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/*global self, unescape */
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/*jslint bitwise: true, regexp: true, confusion: true, es5: true, vars: true, white: true,
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plusplus: true */
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/*! @source http://purl.eligrey.com/github/BlobBuilder.js/blob/master/BlobBuilder.js */
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var BlobBuilder = BlobBuilder || self.WebKitBlobBuilder || self.MozBlobBuilder || (function(view) {
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"use strict";
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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(){
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this.data = [];
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}
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, FakeBlob = function(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 = view.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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, realURL = view.URL || view.webkitURL || view
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, real_create_object_URL = realURL.createObjectURL
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, real_revoke_object_URL = realURL.revokeObjectURL
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, URL = realURL
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, btoa = view.btoa
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, atob = view.atob
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, can_apply_typed_arrays = false
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, can_apply_typed_arrays_test = function(pass) {
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can_apply_typed_arrays = !pass;
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}
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, ArrayBuffer = view.ArrayBuffer
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, Uint8Array = view.Uint8Array
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;
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FakeBlobBuilder.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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try {
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if (Uint8Array) {
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can_apply_typed_arrays_test.apply(0, new Uint8Array(1));
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}
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} catch (ex) {}
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// Create URL if it doesn't exist or to fix a bug in Firefox where URL's properties are
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// reset after the page finishes loading.
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if (!realURL.createObjectURL || get_class(realURL) === "MozURLProperty") {
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URL = view.URL = {};
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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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} 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(realURL, 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(realURL, 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) {
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if (can_apply_typed_arrays) {
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bb.push(String.fromCharCode.apply(String, new Uint8Array(data)));
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} else {
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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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}
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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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return FakeBlobBuilder;
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}(self));
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Vendored
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/*! @source http://purl.eligrey.com/github/BlobBuilder.js/blob/master/BlobBuilder.js */
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var BlobBuilder=BlobBuilder||self.WebKitBlobBuilder||self.MozBlobBuilder||(function(j){"use strict";var c=function(v){return Object.prototype.toString.call(v).match(/^\[object\s(.*)\]$/)[1]},u=function(){this.data=[]},t=function(x,v,w){this.data=x;this.size=x.length;this.type=v;this.encoding=w},k=u.prototype,s=t.prototype,n=j.FileReaderSync,a=function(v){this.code=this[this.name=v]},l=("NOT_FOUND_ERR SECURITY_ERR ABORT_ERR NOT_READABLE_ERR ENCODING_ERR NO_MODIFICATION_ALLOWED_ERR INVALID_STATE_ERR SYNTAX_ERR").split(" "),r=l.length,o=j.URL||j.webkitURL||j,p=o.createObjectURL,b=o.revokeObjectURL,e=o,i=j.btoa,f=j.atob,m=false,h=function(v){m=!v},d=j.ArrayBuffer,g=j.Uint8Array;u.fake=s.fake=true;while(r--){a.prototype[l[r]]=r+1}try{if(g){h.apply(0,new g(1))}}catch(q){}if(!o.createObjectURL||c(o)==="MozURLProperty"){e=j.URL={}}e.createObjectURL=function(w){var x=w.type,v;if(x===null){x="application/octet-stream"}if(w instanceof t){v="data:"+x;if(w.encoding==="base64"){return v+";base64,"+w.data}else{if(w.encoding==="URI"){return v+","+decodeURIComponent(w.data)}}if(i){return v+";base64,"+i(w.data)}else{return v+","+encodeURIComponent(w.data)}}else{if(real_create_object_url){return real_create_object_url.call(o,w)}}};e.revokeObjectURL=function(v){if(v.substring(0,5)!=="data:"&&real_revoke_object_url){real_revoke_object_url.call(o,v)}};k.append=function(z){var B=this.data;if(g&&z instanceof d){if(m){B.push(String.fromCharCode.apply(String,new g(z)))}else{var A="",w=new g(z),x=0,y=w.length;for(;x<y;x++){A+=String.fromCharCode(w[x])}}}else{if(c(z)==="Blob"||c(z)==="File"){if(n){var v=new n;B.push(v.readAsBinaryString(z))}else{throw new a("NOT_READABLE_ERR")}}else{if(z instanceof t){if(z.encoding==="base64"&&f){B.push(f(z.data))}else{if(z.encoding==="URI"){B.push(decodeURIComponent(z.data))}else{if(z.encoding==="raw"){B.push(z.data)}}}}else{if(typeof z!=="string"){z+=""}B.push(unescape(encodeURIComponent(z)))}}}};k.getBlob=function(v){if(!arguments.length){v=null}return new t(this.data.join(""),v,"raw")};k.toString=function(){return"[object BlobBuilder]"};s.slice=function(y,v,x){var w=arguments.length;if(w<3){x=null}return new t(this.data.slice(y,w>1?v:this.data.length),x,this.encoding)};s.toString=function(){return"[object Blob]"};return u}(self));
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+30
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This software is licensed under the MIT/X11 license.
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MIT/X11 license
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---------------
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Copyright © 2011 [Eli Grey][1].
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use,
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copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following
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conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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[1]: http://eligrey.com
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@@ -0,0 +1,15 @@
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BlobBuilder.js
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==============
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BlobBuilder.js implements the W3C [`BlobBuilder`][1] interface in browsers that do
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not natively support it.
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Limitations
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-----------
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You can not append native blobs to a BlobBuilder.js `BlobBuilder` unless the script is in
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a web worker thread, as the necessary `FileReaderSync` interface for reading native blobs
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is limited to web worker threads only.
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[1]: http://www.w3.org/TR/file-writer-api/#the-blobbuilder-interface
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