rar.min.js

(function(){"use strict";var Reader=function(type){this.type=type||Reader.OPEN_URI;this.size=null;this.file=null};Reader.OPEN_FILE=1;Reader.OPEN_URI=2;Reader.OPEN_LOCAL=3;if(typeof require==="function"){var fs=require("fs")}Reader.prototype.open=function(file,callback){this.file=file;var self=this;switch(this.type){case Reader.OPEN_LOCAL:fs.stat(this.file,function(err,stat){if(err){return callback(err)}self.size=stat.size;fs.open(self.file,"r",function(err,fd){if(err){return callback(err)}self.fd=fd;callback()})});break;case Reader.OPEN_FILE:this.size=this.file.size;callback();break;default:this.ajax({uri:this.file,type:"HEAD"},function(err,resp,xhr){if(err){return callback(err)}self.size=parseInt(xhr.getResponseHeader("Content-Length"));callback()});break}};Reader.prototype.close=function(){if(this.type===Reader.OPEN_LOCAL){fs.close(this.fd)}};Reader.prototype.read=function(length,position,callback){if(this.type===Reader.OPEN_LOCAL){this.readLocal(length,position,callback)}else if(this.type===Reader.OPEN_FILE){this.readFile(length,position,callback)}else{this.readUri(length,position,callback)}};Reader.prototype.readBlob=function(length,position,type,callback){if(typeof type==="function"){callback=type;type="application/octet-stream"}this.read(length,position,function(err,data){if(err){callback(err);return}callback(null,new Blob([data],{type:type}))})};Reader.prototype.readLocal=function(length,position,callback){var buffer=new Buffer(length);fs.read(this.fd,buffer,0,length,position,function(err,bytesRead,buffer){if(err){return callback(err)}var ab=new ArrayBuffer(buffer.length),view=new Uint8Array(ab);for(var i=0;i<buffer.length;i++){view[i]=buffer[i]}callback(null,ab)})};Reader.prototype.ajax=function(opts,callback){var options={type:"GET",uri:null,responseType:"text"};if(typeof opts==="string"){opts={uri:opts}}for(var k in opts){options[k]=opts[k]}var xhr=new XMLHttpRequest;xhr.onreadystatechange=function(){if(xhr.readyState!==4)return;if(xhr.status!==200&&xhr.status!==206){return callback("Received non-200/206 response ("+xhr.status+")")}callback(null,xhr.response,xhr)};xhr.responseType=options.responseType;xhr.open(options.type,options.uri,true);if(options.range){options.range=[].concat(options.range);if(options.range.length===2){xhr.setRequestHeader("Range","bytes="+options.range[0]+"-"+options.range[1])}else{xhr.setRequestHeader("Range","bytes="+options.range[0])}}xhr.send()};Reader.prototype.readUri=function(length,position,callback){this.ajax({uri:this.file,type:"GET",responseType:"arraybuffer",range:[position,position+length-1]},function(err,buffer){if(err){return callback(err)}return callback(null,buffer)})};Reader.prototype.readFile=function(length,position,callback){var slice=this.file.slice(position,position+length),fr=new FileReader;fr.onload=function(e){callback(null,e.target.result)};fr.onerror=function(e){callback("File read failed")};fr.readAsArrayBuffer(slice)};DataView.prototype.getString=function(length,offset,raw){offset=offset||0;length=length||this.byteLength-offset;if(length<0){length+=this.byteLength}var str="";if(typeof Buffer!=="undefined"){var data=[];for(var i=offset;i<offset+length;i++){data.push(this.getUint8(i))}return new Buffer(data).toString()}else{for(var i=offset;i<offset+length;i++){str+=String.fromCharCode(this.getUint8(i))}if(raw){return str}return decodeURIComponent(escape(str))}};DataView.prototype.getStringUtf16=function(length,offset,bom){offset=offset||0;length=length||this.byteLength-offset;var littleEndian=false,str="",useBuffer=false;if(typeof Buffer!=="undefined"){str=[];useBuffer=true}if(length<0){length+=this.byteLength}if(bom){var bomInt=this.getUint16(offset);if(bomInt===65534){littleEndian=true}offset+=2;length-=2}for(var i=offset;i<offset+length;i+=2){var ch=this.getUint16(i,littleEndian);if(ch>=0&&ch<=55295||ch>=57344&&ch<=65535){if(useBuffer){str.push(ch)}else{str+=String.fromCharCode(ch)}}else if(ch>=65536&&ch<=1114111){ch-=65536;if(useBuffer){str.push(((1047552&ch)>>10)+55296);str.push((1023&ch)+56320)}else{str+=String.fromCharCode(((1047552&ch)>>10)+55296)+String.fromCharCode((1023&ch)+56320)}}}if(useBuffer){return new Buffer(str).toString()}else{return decodeURIComponent(escape(str))}};DataView.prototype.getSynch=function(num){var out=0,mask=2130706432;while(mask){out>>=1;out|=num&mask;mask>>=8}return out};DataView.prototype.getUint8Synch=function(offset){return this.getSynch(this.getUint8(offset))};DataView.prototype.getUint32Synch=function(offset){return this.getSynch(this.getUint32(offset))};DataView.prototype.getUint24=function(offset,littleEndian){if(littleEndian){return this.getUint8(offset)+(this.getUint8(offset+1)<<8)+(this.getUint8(offset+2)<<16)}return this.getUint8(offset+2)+(this.getUint8(offset+1)<<8)+(this.getUint8(offset)<<16)};var RarEntry=function(){this.name=null;this.path=null;this.size=0;this.sizePacked=0;this.crc=null;this.offset=0;this.blockSize=0;this.headerSize=0;this.encrypted=false;this.version=null;this.time=null;this.method=null;this.os=null;this.partial=false;this.continuesFrom=false;this.continues=false};RarEntry.METHOD_STORE=48;RarEntry.METHOD_FASTEST=49;RarEntry.METHOD_FAST=50;RarEntry.METHOD_NORMAL=51;RarEntry.METHOD_GOOD=52;RarEntry.METHOD_BEST=53;var RarArchive=function(){if(!(this instanceof RarArchive)){return new RarArchive(arguments[0],arguments[1])}this.options={type:RarArchive.OPEN_URI};var opts=arguments[0];if(typeof opts==="string"){opts={file:opts,type:RarArchive.OPEN_URI}}else if(typeof window!=="undefined"&&window.File&&opts instanceof window.File){opts={file:opts,type:RarArchive.OPEN_FILE}}for(var k in opts){this.options[k]=opts[k]}if(!this.options.file){if(arguments[1])arguments[1].call(this,"No file was set");return}if(this.options.type===RarArchive.OPEN_FILE){if(typeof window==="undefined"||!window.File||!window.FileReader||typeof ArrayBuffer==="undefined"){if(arguments[1])arguments[1].call(this,"Browser does not have support for the File API and/or ArrayBuffers")}}else if(this.options.type===RarArchive.OPEN_LOCAL){if(typeof require!=="function"){if(arguments[1])arguments[1].call(this,"Local paths may not be read within a browser");return}}else{}this.file=this.options.file;this.rd=new Reader(this.options.type);this.entries=[];this.valid=false;this.validate(arguments[1])};RarArchive.prototype.validate=function(callback){var self=this;this.rd.open(this.file,function(err){if(err){if(callback)callback.call(self,err);return}self.rd.read(14,0,function(err,data){if(err){if(callback)callback.call(self,err);return}var view=new DataView(data);if(view.getString(7,0,true)!=="Rar!\x00"){if(callback)callback.call(self,"Invalid RAR archive");return}var crc=view.getUint16(7,true),type=view.getUint8(9),flags=view.getUint16(10,true),size=view.getUint16(12,true);if(type!==115){if(callback)callback.call(self,"Invalid RAR archive");return}if((flags&128)!==0){if(callback)callback.call(self,"Encrypted RAR archives are not yet supported");return}self.valid=true;self.readHeaders(size+7,callback)})})};RarArchive.prototype.parseEntry=function(offset,callback){var self=this;this.rd.read(11,offset,function(err,data){if(err){if(callback)callback.call(self,err);return}var view=new DataView(data),flags=view.getUint16(3,true),size=view.getUint16(5,true);self.rd.read(size,offset,function(err,data){var view=new DataView(data);var entry=new RarEntry;entry.partial=(flags&1)!==0||(flags&2)!==0;entry.continuesFrom=(flags&1)!==0;entry.continues=(flags&2)!==0;entry.offset=offset;entry.sizePacked=view.getUint32(7,true);entry.size=view.getUint32(11,true);entry.crc=view.getUint32(16,true);entry.time=function(){var time=view.getUint32(20,true).toString(2);if(time.length<32){time=new Array(32-time.length+1).join("0")+time}time=time.match(/(\d{7})(\d{4})(\d{5})(\d{5})(\d{6})(\d{5})/).slice(1).map(function(val){return parseInt(val,2)});return new Date(1980+time[0],time[1]-1,time[2],time[3],time[4],time[5])}();entry.os=function(){var os=view.getUint8(15);switch(os){case 0:return"MS-DOS";case 1:return"OS/2";case 2:return"Windows";case 3:return"Unix";case 4:return"Mac";case 5:return"BeOS"}}();entry.version=view.getUint8(24);entry.method=view.getUint8(25);entry.encrypted=(flags&4)!==0;var nameSize=view.getUint16(26,true);if((flags&256)!==0){entry.sizePacked+=view.getUint32(32,true)*4294967296;entry.size+=view.getUint32(36,true)*4294967296;entry.path=view.getString(nameSize,40)}else{entry.path=view.getString(nameSize,32)}if((flags&512)!==0&&entry.path.indexOf("\x00")!==-1){entry.path=entry.path.split("\x00")[1]}entry.name=entry.path;if(entry.name.indexOf("\\")!==-1){entry.name=entry.name.substr(entry.name.lastIndexOf("\\")+1)}else{entry.name=entry.name.substr(entry.name.lastIndexOf("/")+1)}entry.headerSize=size;entry.blockSize=entry.headerSize+entry.sizePacked;if(callback)callback.call(self,null,entry)})})};RarArchive.prototype.readHeaders=function(offset,callback){var self=this;var cb=function(err,data){if(err){if(callback)callback.call(self,err);return}var view=new DataView(data),crc=view.getUint16(0,true),type=view.getUint8(2),flags=view.getUint16(3,true),size=view.getUint16(5,true);if((flags&32768)!==0){size+=view.getUint32(7,true)}switch(type){case 116:self.parseEntry(offset,function(err,entry){if(err){if(callback)callback.call(self,"Read error occurred while reading entry");return}self.entries.push(entry);offset+=entry.blockSize;if(offset>=self.rd.size){if(callback)callback.call(self,null);return}self.rd.read(11,offset,cb)});break;default:offset+=size;if(offset>=self.rd.size){if(callback)callback.call(self,null);return}self.rd.read(11,offset,cb);break}};if(this.rd.size<=14){if(callback)callback.call(self,null,this.entries);return}this.rd.read(11,offset,cb)};RarArchive.prototype.get=function(entry,callback){if(!this.valid){if(callback)callback.call(this,"Invalid RAR archive");return}if(!(entry instanceof RarEntry)){if(callback)callback.call(this,"Invalid RAR entry, must be an instance of RarEntry");return}if(entry.method!==RarEntry.METHOD_STORE){if(callback)callback.call(this,"Compression is not yet supported");return}this.rd.readBlob(entry.blockSize-1,entry.offset+entry.headerSize,function(err,data){if(err){if(callback)callback.call(self,err);return}if(callback)callback.call(self,null,data)})};RarArchive.OPEN_FILE=Reader.OPEN_FILE;RarArchive.OPEN_URI=Reader.OPEN_URI;RarArchive.OPEN_LOCAL=Reader.OPEN_LOCAL;if(typeof module!=="undefined"&&module.exports){module.exports=RarArchive}else{if(typeof define==="function"&&define.amd){define("rar",[],function(){return RarArchive})}else{window.RarArchive=RarArchive}}})();