untar.min.js

!function(e,r){"function"==typeof define&&define.amd?define([],r):"object"==typeof exports?module.exports=r():e.untar=r()}(this,function(){"use strict";function e(e){function r(e){for(var r=0,n=t.length;r<n;++r)t[r](e);a.push(e)}if("function"!=typeof Promise)throw new Error("Promise implementation not available in this environment.");var t=[],a=[],n=new Promise(function(t,a){e(t,a,r)});n.progress=function(e){if("function"!=typeof e)throw new Error("cb is not a function.");for(var r=0,i=a.length;r<i;++r)e(a[r]);return t.push(e),n};var i=n.then;return n.then=function(e,r,t){return i.call(n,e,r),void 0!==t&&n.progress(t),n},n}function r(r){if(!(r instanceof ArrayBuffer))throw new TypeError("arrayBuffer is not an instance of ArrayBuffer.");if(!n.Worker)throw new Error("Worker implementation is not available in this environment.");return new e(function(e,n,i){var o=new Worker(a),s=[];o.onerror=function(e){n(e)},o.onmessage=function(r){switch(r=r.data,r.type){case"log":console[r.data.level]("Worker: "+r.data.msg);break;case"extract":var a=t(r.data);s.push(a),i(a);break;case"complete":o.terminate(),e(s);break;case"error":o.terminate(),n(new Error(r.data.message));break;default:o.terminate(),n(new Error("Unknown message from worker: "+r.type))}},o.postMessage({type:"extract",buffer:r},[r])})}function t(e){return Object.defineProperties(e,o),e}var a,n=window||this,i=n.URL||n.webkitURL,o={blob:{get:function(){return this._blob||(this._blob=new Blob([this.buffer]))}},getBlobUrl:{value:function(){return this._blobUrl||(this._blobUrl=i.createObjectURL(this.blob))}},readAsString:{value:function(){for(var e=this.buffer,r=e.byteLength,t=1,a=new DataView(e),n=[],i=0;i<r;++i){var o=a.getUint8(i*t,!0);n.push(o)}return this._string=String.fromCharCode.apply(null,n)}},readAsJSON:{value:function(){return JSON.parse(this.readAsString())}}};return a=(window||this).URL.createObjectURL(new Blob(['"use strict";function UntarWorker(){}function decodeUTF8(e){for(var r="",t=0;t<e.length;){var a=e[t++];if(a>127){if(a>191&&a<224){if(t>=e.length)throw"UTF-8 decode: incomplete 2-byte sequence";a=(31&a)<<6|63&e[t]}else if(a>223&&a<240){if(t+1>=e.length)throw"UTF-8 decode: incomplete 3-byte sequence";a=(15&a)<<12|(63&e[t])<<6|63&e[++t]}else{if(!(a>239&&a<248))throw"UTF-8 decode: unknown multibyte start 0x"+a.toString(16)+" at index "+(t-1);if(t+2>=e.length)throw"UTF-8 decode: incomplete 4-byte sequence";a=(7&a)<<18|(63&e[t])<<12|(63&e[++t])<<6|63&e[++t]}++t}if(a<=65535)r+=String.fromCharCode(a);else{if(!(a<=1114111))throw"UTF-8 decode: code point 0x"+a.toString(16)+" exceeds UTF-16 reach";a-=65536,r+=String.fromCharCode(a>>10|55296),r+=String.fromCharCode(1023&a|56320)}}return r}function PaxHeader(e){this._fields=e}function TarFile(){}function UntarStream(e){this._bufferView=new DataView(e),this._position=0}function UntarFileStream(e){this._stream=new UntarStream(e),this._globalPaxHeader=null}if(UntarWorker.prototype={onmessage:function(e){try{if("extract"!==e.data.type)throw new Error("Unknown message type: "+e.data.type);this.untarBuffer(e.data.buffer)}catch(r){this.postError(r)}},postError:function(e){this.postMessage({type:"error",data:{message:e.message}})},postLog:function(e,r){this.postMessage({type:"log",data:{level:e,msg:r}})},untarBuffer:function(e){try{for(var r=new UntarFileStream(e);r.hasNext();){var t=r.next();this.postMessage({type:"extract",data:t},[t.buffer])}this.postMessage({type:"complete"})}catch(a){this.postError(a)}},postMessage:function(e,r){self.postMessage(e,r)}},"undefined"!=typeof self){var worker=new UntarWorker;self.onmessage=function(e){worker.onmessage(e)}}PaxHeader.parse=function(e){for(var r=new Uint8Array(e),t=[];r.length>0;){var a=parseInt(decodeUTF8(r.subarray(0,r.indexOf(32)))),n=decodeUTF8(r.subarray(0,a)),i=n.match(/^\\d+ ([^=]+)=(.*)\\n$/);if(null===i)throw new Error("Invalid PAX header data format.");var s=i[1],o=i[2];0===o.length?o=null:null!==o.match(/^\\d+$/)&&(o=parseInt(o));var f={name:s,value:o};t.push(f),r=r.subarray(a)}return new PaxHeader(t)},PaxHeader.prototype={applyHeader:function(e){this._fields.forEach(function(r){var t=r.name,a=r.value;"path"===t?(t="name",void 0!==e.prefix&&delete e.prefix):"linkpath"===t&&(t="linkname"),null===a?delete e[t]:e[t]=a})}},UntarStream.prototype={readString:function(e){for(var r=1,t=e*r,a=[],n=0;n<e;++n){var i=this._bufferView.getUint8(this.position()+n*r,!0);if(0===i)break;a.push(i)}return this.seek(t),String.fromCharCode.apply(null,a)},readBuffer:function(e){var r;if("function"==typeof ArrayBuffer.prototype.slice)r=this._bufferView.buffer.slice(this.position(),this.position()+e);else{r=new ArrayBuffer(e);var t=new Uint8Array(r),a=new Uint8Array(this._bufferView.buffer,this.position(),e);t.set(a)}return this.seek(e),r},seek:function(e){this._position+=e},peekUint32:function(){return this._bufferView.getUint32(this.position(),!0)},position:function(e){return void 0===e?this._position:void(this._position=e)},size:function(){return this._bufferView.byteLength}},UntarFileStream.prototype={hasNext:function(){return this._stream.position()+4<this._stream.size()&&0!==this._stream.peekUint32()},next:function(){return this._readNextFile()},_readNextFile:function(){var e=this._stream,r=new TarFile,t=!1,a=null,n=e.position(),i=n+512;switch(r.name=e.readString(100),r.mode=e.readString(8),r.uid=parseInt(e.readString(8)),r.gid=parseInt(e.readString(8)),r.size=parseInt(e.readString(12),8),r.mtime=parseInt(e.readString(12),8),r.checksum=parseInt(e.readString(8)),r.type=e.readString(1),r.linkname=e.readString(100),r.ustarFormat=e.readString(6),r.ustarFormat.indexOf("ustar")>-1&&(r.version=e.readString(2),r.uname=e.readString(32),r.gname=e.readString(32),r.devmajor=parseInt(e.readString(8)),r.devminor=parseInt(e.readString(8)),r.namePrefix=e.readString(155),r.namePrefix.length>0&&(r.name=r.namePrefix+"/"+r.name)),e.position(i),r.type){case"0":case"":r.buffer=e.readBuffer(r.size);break;case"1":break;case"2":break;case"3":break;case"4":break;case"5":break;case"6":break;case"7":break;case"g":t=!0,this._globalPaxHeader=PaxHeader.parse(e.readBuffer(r.size));break;case"x":t=!0,a=PaxHeader.parse(e.readBuffer(r.size))}void 0===r.buffer&&(r.buffer=new ArrayBuffer(0));var s=i+r.size;return r.size%512!==0&&(s+=512-r.size%512),e.position(s),t&&(r=this._readNextFile()),null!==this._globalPaxHeader&&this._globalPaxHeader.applyHeader(r),null!==a&&a.applyHeader(r),r}};'])),r});