├── .gitignore ├── .npmignore ├── dist ├── zip-loader.js ├── zip-loader.min.js ├── zip-loader.module.js └── zip-loader.module.min.js ├── examples ├── 496_RPG_icons.html ├── 496_RPG_icons.zip ├── basic.html ├── basic.zip ├── basic │ └── data.json ├── direct-unzip.html ├── index.html ├── logo.svg ├── mixed.html └── mixed.zip ├── package.json ├── readme.md ├── rollup.config.mjs └── src ├── DataReader.js ├── ZipLoader.js ├── parseZip.js └── types.ts /.gitignore: -------------------------------------------------------------------------------- 1 | *.DS_Store 2 | Thumbs.db 3 | 4 | logs 5 | *.log 6 | npm-debug.log* 7 | 8 | *.map 9 | 10 | node_modules 11 | package-lock.json 12 | -------------------------------------------------------------------------------- /.npmignore: -------------------------------------------------------------------------------- 1 | examples/* 2 | -------------------------------------------------------------------------------- /dist/zip-loader.js: -------------------------------------------------------------------------------- 1 | /*! 2 | * zip-loader 3 | * https://github.com/yomotsu/ZipLoader 4 | * (c) 2017 @yomotsu 5 | * Released under the MIT License. 6 | * ZipLoader uses pako, released under the MIT license. 7 | */ 8 | (function (global, factory) { 9 | typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() : 10 | typeof define === 'function' && define.amd ? define(factory) : 11 | (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.ZipLoader = factory()); 12 | })(this, (function () { 'use strict'; 13 | 14 | var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {}; 15 | 16 | var pako_inflate_min = {exports: {}}; 17 | 18 | /*! pako 2.1.0 https://github.com/nodeca/pako @license (MIT AND Zlib) */ 19 | 20 | (function (module, exports) 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we=he,be=ue,me=function(e,t){return (t=t||{}).raw=!0,ue(e,t)},ke=ue,_e=h,ge={Inflate:we,inflate:be,inflateRaw:me,ungzip:ke,constants:_e};e.Inflate=we,e.constants=_e,e.default=ge,e.inflate=be,e.inflateRaw=me,e.ungzip=ke,Object.defineProperty(e,"__esModule",{value:!0});})); 22 | } (pako_inflate_min, pako_inflate_min.exports)); 23 | 24 | var pako_inflate_minExports = pako_inflate_min.exports; 25 | 26 | const LITTLE_ENDIAN = true; 27 | 28 | class DataReader { 29 | 30 | /** @param {ArrayBuffer} buffer */ 31 | constructor( buffer ) { 32 | 33 | this.dataView = new DataView( buffer ); 34 | this.position = 0; 35 | 36 | } 37 | 38 | /** @param {number} length */ 39 | skip( length ) { 40 | 41 | this.position += length; 42 | 43 | } 44 | 45 | /** @param {number} length */ 46 | readBytes( length ) { 47 | 48 | const type = length === 4 ? 'getUint32' : 49 | length === 2 ? 'getUint16' : 50 | 'getUint8'; 51 | const start = this.position; 52 | this.position += length; 53 | return this.dataView[ type ]( start, LITTLE_ENDIAN ); 54 | 55 | } 56 | 57 | } 58 | 59 | const LOCAL_FILE_HEADER = 0x04034b50; 60 | const CENTRAL_DIRECTORY = 0x02014b50; 61 | // const END_OF_CENTRAL_DIRECTORY = 0x06054b50; 62 | 63 | const parseZip = ( buffer ) => { 64 | 65 | const reader = new DataReader( buffer ); 66 | const files = {}; 67 | 68 | while ( true ) { 69 | 70 | const signature = reader.readBytes( 4 ); 71 | 72 | if ( signature === LOCAL_FILE_HEADER ) { 73 | 74 | const file = parseLocalFile( reader ); 75 | files[ file.name ] = { buffer: file.buffer }; 76 | continue; 77 | 78 | } 79 | 80 | if ( signature === CENTRAL_DIRECTORY ) { 81 | 82 | parseCentralDirectory( reader ); 83 | continue; 84 | 85 | } 86 | 87 | break; 88 | 89 | } 90 | 91 | return files; 92 | 93 | }; 94 | 95 | // # Local file header 96 | // 97 | // | Offset | Length | Contents | 98 | // | ------ | -------- | ---------------------------------------- | 99 | // | 0 | 4 bytes | Local file header signature (0x04034b50) | 100 | // | 4 | 2 bytes | Version needed to extract | 101 | // | 6 | 2 bytes | General purpose bit flag | 102 | // | 8 | 2 bytes | Compression method | 103 | // | 10 | 2 bytes | Last mod file time | 104 | // | 12 | 2 bytes | Last mod file date | 105 | // | 14 | 4 bytes | CRC-32 | 106 | // | 18 | 4 bytes | Compressed size (n) | 107 | // | 22 | 4 bytes | Uncompressed size | 108 | // | 26 | 2 bytes | Filename length (f) | 109 | // | 28 | 2 bytes | Extra field length (e) | 110 | // | | (f)bytes | Filename | 111 | // | | (e)bytes | Extra field | 112 | // | | (n)bytes | Compressed data | 113 | const parseLocalFile = ( reader ) => { 114 | 115 | let i = 0; 116 | let data; 117 | reader.skip( 4 ); 118 | // const version = reader.readBytes( 2 ); 119 | // const bitFlag = reader.readBytes( 2 ); 120 | const compression = reader.readBytes( 2 ); 121 | reader.skip( 8 ); 122 | // const lastModTime = reader.readBytes( 2 ); 123 | // const lastModDate = reader.readBytes( 2 ); 124 | // const crc32 = reader.readBytes( 4 ); 125 | const compressedSize = reader.readBytes( 4 ); 126 | reader.skip( 4 ); 127 | // const uncompressedSize = reader.readBytes( 4 ); 128 | const filenameLength = reader.readBytes( 2 ); 129 | const extraFieldLength = reader.readBytes( 2 ); 130 | const filename = []; 131 | // const extraField = []; 132 | const compressedData = new Uint8Array( compressedSize ); 133 | 134 | for ( i = 0; i < filenameLength; i ++ ) { 135 | 136 | filename.push( String.fromCharCode( reader.readBytes( 1 ) ) ); 137 | 138 | } 139 | 140 | reader.skip( extraFieldLength ); 141 | // for ( i = 0; i < extraFieldLength; i ++ ) { 142 | 143 | // extraField.push( reader.readBytes( 1 ) ); 144 | 145 | // } 146 | 147 | for ( i = 0; i < compressedSize; i ++ ) { 148 | 149 | compressedData[ i ] = reader.readBytes( 1 ); 150 | 151 | } 152 | 153 | switch ( compression ) { 154 | 155 | case 0: 156 | data = compressedData; 157 | break; 158 | case 8: 159 | data = new Uint8Array( pako_inflate_minExports.inflate( compressedData, { raw: true } ) ); 160 | break; 161 | default: 162 | console.log( `${ filename.join( '' ) }: unsupported compression type` ); 163 | data = compressedData; 164 | 165 | } 166 | 167 | return { 168 | name: filename.join( '' ), 169 | buffer: data 170 | }; 171 | 172 | }; 173 | 174 | // # Central directory 175 | // 176 | // | Offset | Length | Contents | 177 | // | ------ | -------- | ------------------------------------------ | 178 | // | 0 | 4 bytes | Central file header signature (0x02014b50) | 179 | // | 4 | 2 bytes | Version made by | 180 | // | 6 | 2 bytes | Version needed to extract | 181 | // | 8 | 2 bytes | General purpose bit flag | 182 | // | 10 | 2 bytes | Compression method | 183 | // | 12 | 2 bytes | Last mod file time | 184 | // | 14 | 2 bytes | Last mod file date | 185 | // | 16 | 4 bytes | CRC-32 | 186 | // | 20 | 4 bytes | Compressed size | 187 | // | 24 | 4 bytes | Uncompressed size | 188 | // | 28 | 2 bytes | Filename length (f) | 189 | // | 30 | 2 bytes | Extra field length (e) | 190 | // | 32 | 2 bytes | File comment length (c) | 191 | // | 34 | 2 bytes | Disk number start | 192 | // | 36 | 2 bytes | Internal file attributes | 193 | // | 38 | 4 bytes | External file attributes | 194 | // | 42 | 4 bytes | Relative offset of local header | 195 | // | 46 | (f)bytes | Filename | 196 | // | | (e)bytes | Extra field | 197 | // | | (c)bytes | File comment | 198 | const parseCentralDirectory = ( reader ) => { 199 | 200 | // let i = 0; 201 | reader.skip( 24 ); 202 | // const versionMadeby = reader.readBytes( 2 ); 203 | // const versionNeedToExtract = reader.readBytes( 2 ); 204 | // const bitFlag = reader.readBytes( 2 ); 205 | // const compression = reader.readBytes( 2 ); 206 | // const lastModTime = reader.readBytes( 2 ); 207 | // const lastModDate = reader.readBytes( 2 ); 208 | // const crc32 = reader.readBytes( 4 ); 209 | // const compressedSize = reader.readBytes( 4 ); 210 | // const uncompressedSize = reader.readBytes( 4 ); 211 | const filenameLength = reader.readBytes( 2 ); 212 | const extraFieldLength = reader.readBytes( 2 ); 213 | const fileCommentLength = reader.readBytes( 2 ); 214 | reader.skip( 12 ); 215 | // const diskNumberStart = reader.readBytes( 2 ); 216 | // const internalFileAttrs = reader.readBytes( 2 ); 217 | // const externalFileAttrs = reader.readBytes( 4 ); 218 | // const relativeOffset = reader.readBytes( 4 ); 219 | // const filename = []; 220 | // const extraField = []; 221 | // const fileComment = []; 222 | 223 | reader.skip( filenameLength ); 224 | // for ( i = 0; i < filenameLength; i ++ ) { 225 | 226 | // filename.push( String.fromCharCode( reader.readBytes( 1 ) ) ); 227 | 228 | // } 229 | 230 | reader.skip( extraFieldLength ); 231 | // for ( i = 0; i < extraFieldLength; i ++ ) { 232 | 233 | // extraField.push( reader.readBytes( 1 ) ); 234 | 235 | // } 236 | 237 | reader.skip( fileCommentLength ); 238 | // for ( i = 0; i < fileCommentLength; i ++ ) { 239 | 240 | // fileComment.push( reader.readBytes( 1 ) ); 241 | 242 | // } 243 | 244 | }; 245 | 246 | /** 247 | * @class ZipLoader 248 | * @classdesc A class for loading and extracting files from a ZIP archive. 249 | */ 250 | const ZipLoader = class ZipLoader { 251 | 252 | /** 253 | * @function 254 | * @description Loads a zip archive from a File or Blob object and returns a Promise that resolves with a new ZipLoader instance 255 | * @param {Blob|File} blobOrFile - The Blob or File object to load 256 | * @returns {Promise} 257 | */ 258 | static unzip( blobOrFile ) { 259 | 260 | return new Promise( ( resolve ) => { 261 | 262 | const instance = new ZipLoader(); 263 | const fileReader = new FileReader(); 264 | 265 | fileReader.onload = ( event ) => { 266 | 267 | const arrayBuffer = event.target.result; 268 | instance.files = parseZip( arrayBuffer ); 269 | resolve( instance ); 270 | 271 | }; 272 | 273 | if ( blobOrFile instanceof Blob ) { 274 | 275 | fileReader.readAsArrayBuffer( blobOrFile ); 276 | 277 | } 278 | 279 | } ); 280 | 281 | } 282 | 283 | /** 284 | * @constructor 285 | * @param {string} url 286 | * @param {RequestInit} fetchOptions 287 | */ 288 | constructor( url, fetchOptions = {} ) { 289 | 290 | /** @private */ 291 | this._listeners = {}; 292 | 293 | /** @type {String|undefined} */ 294 | this.url = url; 295 | 296 | /** @type {RequestInit} */ 297 | this.fetchOptions = fetchOptions; 298 | 299 | /** @type {import('./types.ts').Files | null} */ 300 | this.files = null; 301 | 302 | } 303 | 304 | /** 305 | * Loads the ZIP archive specified by the url property. 306 | * Returns a Promise that resolves when the ZIP archive has been loaded and extracted. 307 | * 308 | * @async 309 | * @returns {Promise} A Promise that resolves when the ZIP archive has been loaded and extracted. 310 | */ 311 | async load() { 312 | 313 | this.clear(); 314 | 315 | const startTime = Date.now(); 316 | const res = await fetch( this.url, this.fetchOptions ).then( ( res ) => { 317 | 318 | const that = this; 319 | const total = parseInt( res.headers.get( 'content-length' ), 10 ); 320 | let loaded = 0; 321 | 322 | return new Response( new ReadableStream( { 323 | start( controller ) { 324 | const reader = res.body.getReader(); 325 | 326 | const pump = async () => { 327 | const { done, value } = await reader.read(); 328 | if ( done ) { 329 | 330 | controller.close(); 331 | return; 332 | 333 | } 334 | loaded += value.byteLength; 335 | controller.enqueue( value ); 336 | that.dispatch( { 337 | type: 'progress', 338 | loaded, 339 | total, 340 | elapsedTime: Date.now() - startTime, 341 | } ); 342 | pump(); 343 | }; 344 | pump(); 345 | } 346 | } ) ); 347 | 348 | } ).catch( ( error ) => { 349 | 350 | this.dispatch( { 351 | type: 'error', 352 | error 353 | } ); 354 | 355 | } ); 356 | 357 | const arrayBuffer = await res.arrayBuffer(); 358 | this.files = parseZip( arrayBuffer ); 359 | this.dispatch( { 360 | type: 'load', 361 | elapsedTime: Date.now() - startTime, 362 | } ); 363 | 364 | return this.files; 365 | 366 | } 367 | 368 | /** 369 | * Extracts a file from the loaded ZIP archive and returns it as a Blob URL. 370 | * 371 | * @param {string} filename - The name of the file to extract. 372 | * @param {string} type - The MIME type of the file. 373 | * @returns {string} The Blob URL of the extracted file. 374 | */ 375 | extractAsBlobUrl( filename, type ) { 376 | 377 | if ( this.files[ filename ].url ) { 378 | 379 | return this.files[ filename ].url; 380 | 381 | } 382 | 383 | const blob = new Blob( [ this.files[ filename ].buffer ], { type: type } ); 384 | this.files[ filename ].url = URL.createObjectURL( blob ); 385 | return this.files[ filename ].url; 386 | 387 | } 388 | 389 | /** 390 | * @param {string} filename 391 | * @returns {string|undefined} 392 | */ 393 | extractAsText( filename ) { 394 | 395 | const buffer = this.files[ filename ].buffer; 396 | 397 | if ( typeof TextDecoder !== 'undefined' ) { 398 | 399 | return new TextDecoder().decode( buffer ); 400 | 401 | } 402 | 403 | let str = ''; 404 | 405 | for ( let i = 0, l = buffer.length; i < l; i ++ ) { 406 | 407 | str += String.fromCharCode( buffer[ i ] ); 408 | 409 | } 410 | 411 | return decodeURIComponent( escape( str ) ); 412 | 413 | } 414 | 415 | /** 416 | * @param {string} filename 417 | * @returns {*} 418 | */ 419 | extractAsJSON( filename ) { 420 | 421 | return JSON.parse( this.extractAsText( filename ) ); 422 | 423 | } 424 | 425 | /** 426 | * Adds the specified event listener. 427 | * @param {string} type event name 428 | * @param {import('./types.ts').Listener} listener handler function 429 | */ 430 | on( type, listener ) { 431 | 432 | if ( ! this._listeners[ type ] ) { 433 | 434 | this._listeners[ type ] = []; 435 | 436 | } 437 | 438 | if ( this._listeners[ type ].indexOf( listener ) === - 1 ) { 439 | 440 | this._listeners[ type ].push( listener ); 441 | 442 | } 443 | 444 | } 445 | 446 | /** 447 | * Removes the specified event listener 448 | * @param {string} type event name 449 | * @param {import('./types.ts').Listener} listener handler function 450 | */ 451 | off( type, listener ) { 452 | 453 | const listenerArray = this._listeners[ type ]; 454 | 455 | if ( !! listenerArray ) { 456 | 457 | const index = listenerArray.indexOf( listener ); 458 | 459 | if ( index !== - 1 ) { 460 | 461 | listenerArray.splice( index, 1 ); 462 | 463 | } 464 | 465 | } 466 | 467 | } 468 | 469 | dispatch( event ) { 470 | 471 | const listenerArray = this._listeners[ event.type ]; 472 | 473 | if ( !! listenerArray ) { 474 | 475 | event.target = this; 476 | const length = listenerArray.length; 477 | 478 | for ( let i = 0; i < length; i ++ ) { 479 | 480 | listenerArray[ i ].call( this, event ); 481 | 482 | } 483 | 484 | } 485 | 486 | } 487 | 488 | /** @param {string=} filename */ 489 | clear( filename ) { 490 | 491 | if ( !! filename ) { 492 | 493 | URL.revokeObjectURL( this.files[ filename ].url ); 494 | delete this.files[ filename ]; 495 | return; 496 | 497 | } 498 | 499 | for ( let key in this.files ) { 500 | 501 | URL.revokeObjectURL( this.files[ key ].url ); 502 | 503 | } 504 | 505 | this.files = null; 506 | 507 | } 508 | 509 | }; 510 | 511 | return ZipLoader; 512 | 513 | })); 514 | -------------------------------------------------------------------------------- /dist/zip-loader.min.js: -------------------------------------------------------------------------------- 1 | /*! 2 | * zip-loader 3 | * https://github.com/yomotsu/ZipLoader 4 | * (c) 2017 @yomotsu 5 | * Released under the MIT License. 6 | * ZipLoader uses pako, released under the MIT license. 7 | */ 8 | (function(global,factory){typeof exports==="object"&&typeof module!=="undefined"?module.exports=factory():typeof define==="function"&&define.amd?define(factory):(global=typeof globalThis!=="undefined"?globalThis:global||self,global.ZipLoader=factory())})(this,(function(){"use strict";var commonjsGlobal=typeof 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we=he,be=ue,me=function(e,t){return (t=t||{}).raw=!0,ue(e,t)},ke=ue,_e=h,ge={Inflate:we,inflate:be,inflateRaw:me,ungzip:ke,constants:_e};e.Inflate=we,e.constants=_e,e.default=ge,e.inflate=be,e.inflateRaw=me,e.ungzip=ke,Object.defineProperty(e,"__esModule",{value:!0});})); 16 | } (pako_inflate_min, pako_inflate_min.exports)); 17 | 18 | var pako_inflate_minExports = pako_inflate_min.exports; 19 | 20 | const LITTLE_ENDIAN = true; 21 | 22 | class DataReader { 23 | 24 | /** @param {ArrayBuffer} buffer */ 25 | constructor( buffer ) { 26 | 27 | this.dataView = new DataView( buffer ); 28 | this.position = 0; 29 | 30 | } 31 | 32 | /** @param {number} length */ 33 | skip( length ) { 34 | 35 | this.position += length; 36 | 37 | } 38 | 39 | /** @param {number} length */ 40 | readBytes( length ) { 41 | 42 | const type = length === 4 ? 'getUint32' : 43 | length === 2 ? 'getUint16' : 44 | 'getUint8'; 45 | const start = this.position; 46 | this.position += length; 47 | return this.dataView[ type ]( start, LITTLE_ENDIAN ); 48 | 49 | } 50 | 51 | } 52 | 53 | const LOCAL_FILE_HEADER = 0x04034b50; 54 | const CENTRAL_DIRECTORY = 0x02014b50; 55 | // const END_OF_CENTRAL_DIRECTORY = 0x06054b50; 56 | 57 | const parseZip = ( buffer ) => { 58 | 59 | const reader = new DataReader( buffer ); 60 | const files = {}; 61 | 62 | while ( true ) { 63 | 64 | const signature = reader.readBytes( 4 ); 65 | 66 | if ( signature === LOCAL_FILE_HEADER ) { 67 | 68 | const file = parseLocalFile( reader ); 69 | files[ file.name ] = { buffer: file.buffer }; 70 | continue; 71 | 72 | } 73 | 74 | if ( signature === CENTRAL_DIRECTORY ) { 75 | 76 | parseCentralDirectory( reader ); 77 | continue; 78 | 79 | } 80 | 81 | break; 82 | 83 | } 84 | 85 | return files; 86 | 87 | }; 88 | 89 | // # Local file header 90 | // 91 | // | Offset | Length | Contents | 92 | // | ------ | -------- | ---------------------------------------- | 93 | // | 0 | 4 bytes | Local file header signature (0x04034b50) | 94 | // | 4 | 2 bytes | Version needed to extract | 95 | // | 6 | 2 bytes | General purpose bit flag | 96 | // | 8 | 2 bytes | Compression method | 97 | // | 10 | 2 bytes | Last mod file time | 98 | // | 12 | 2 bytes | Last mod file date | 99 | // | 14 | 4 bytes | CRC-32 | 100 | // | 18 | 4 bytes | Compressed size (n) | 101 | // | 22 | 4 bytes | Uncompressed size | 102 | // | 26 | 2 bytes | Filename length (f) | 103 | // | 28 | 2 bytes | Extra field length (e) | 104 | // | | (f)bytes | Filename | 105 | // | | (e)bytes | Extra field | 106 | // | | (n)bytes | Compressed data | 107 | const parseLocalFile = ( reader ) => { 108 | 109 | let i = 0; 110 | let data; 111 | reader.skip( 4 ); 112 | // const version = reader.readBytes( 2 ); 113 | // const bitFlag = reader.readBytes( 2 ); 114 | const compression = reader.readBytes( 2 ); 115 | reader.skip( 8 ); 116 | // const lastModTime = reader.readBytes( 2 ); 117 | // const lastModDate = reader.readBytes( 2 ); 118 | // const crc32 = reader.readBytes( 4 ); 119 | const compressedSize = reader.readBytes( 4 ); 120 | reader.skip( 4 ); 121 | // const uncompressedSize = reader.readBytes( 4 ); 122 | const filenameLength = reader.readBytes( 2 ); 123 | const extraFieldLength = reader.readBytes( 2 ); 124 | const filename = []; 125 | // const extraField = []; 126 | const compressedData = new Uint8Array( compressedSize ); 127 | 128 | for ( i = 0; i < filenameLength; i ++ ) { 129 | 130 | filename.push( String.fromCharCode( reader.readBytes( 1 ) ) ); 131 | 132 | } 133 | 134 | reader.skip( extraFieldLength ); 135 | // for ( i = 0; i < extraFieldLength; i ++ ) { 136 | 137 | // extraField.push( reader.readBytes( 1 ) ); 138 | 139 | // } 140 | 141 | for ( i = 0; i < compressedSize; i ++ ) { 142 | 143 | compressedData[ i ] = reader.readBytes( 1 ); 144 | 145 | } 146 | 147 | switch ( compression ) { 148 | 149 | case 0: 150 | data = compressedData; 151 | break; 152 | case 8: 153 | data = new Uint8Array( pako_inflate_minExports.inflate( compressedData, { raw: true } ) ); 154 | break; 155 | default: 156 | console.log( `${ filename.join( '' ) }: unsupported compression type` ); 157 | data = compressedData; 158 | 159 | } 160 | 161 | return { 162 | name: filename.join( '' ), 163 | buffer: data 164 | }; 165 | 166 | }; 167 | 168 | // # Central directory 169 | // 170 | // | Offset | Length | Contents | 171 | // | ------ | -------- | ------------------------------------------ | 172 | // | 0 | 4 bytes | Central file header signature (0x02014b50) | 173 | // | 4 | 2 bytes | Version made by | 174 | // | 6 | 2 bytes | Version needed to extract | 175 | // | 8 | 2 bytes | General purpose bit flag | 176 | // | 10 | 2 bytes | Compression method | 177 | // | 12 | 2 bytes | Last mod file time | 178 | // | 14 | 2 bytes | Last mod file date | 179 | // | 16 | 4 bytes | CRC-32 | 180 | // | 20 | 4 bytes | Compressed size | 181 | // | 24 | 4 bytes | Uncompressed size | 182 | // | 28 | 2 bytes | Filename length (f) | 183 | // | 30 | 2 bytes | Extra field length (e) | 184 | // | 32 | 2 bytes | File comment length (c) | 185 | // | 34 | 2 bytes | Disk number start | 186 | // | 36 | 2 bytes | Internal file attributes | 187 | // | 38 | 4 bytes | External file attributes | 188 | // | 42 | 4 bytes | Relative offset of local header | 189 | // | 46 | (f)bytes | Filename | 190 | // | | (e)bytes | Extra field | 191 | // | | (c)bytes | File comment | 192 | const parseCentralDirectory = ( reader ) => { 193 | 194 | // let i = 0; 195 | reader.skip( 24 ); 196 | // const versionMadeby = reader.readBytes( 2 ); 197 | // const versionNeedToExtract = reader.readBytes( 2 ); 198 | // const bitFlag = reader.readBytes( 2 ); 199 | // const compression = reader.readBytes( 2 ); 200 | // const lastModTime = reader.readBytes( 2 ); 201 | // const lastModDate = reader.readBytes( 2 ); 202 | // const crc32 = reader.readBytes( 4 ); 203 | // const compressedSize = reader.readBytes( 4 ); 204 | // const uncompressedSize = reader.readBytes( 4 ); 205 | const filenameLength = reader.readBytes( 2 ); 206 | const extraFieldLength = reader.readBytes( 2 ); 207 | const fileCommentLength = reader.readBytes( 2 ); 208 | reader.skip( 12 ); 209 | // const diskNumberStart = reader.readBytes( 2 ); 210 | // const internalFileAttrs = reader.readBytes( 2 ); 211 | // const externalFileAttrs = reader.readBytes( 4 ); 212 | // const relativeOffset = reader.readBytes( 4 ); 213 | // const filename = []; 214 | // const extraField = []; 215 | // const fileComment = []; 216 | 217 | reader.skip( filenameLength ); 218 | // for ( i = 0; i < filenameLength; i ++ ) { 219 | 220 | // filename.push( String.fromCharCode( reader.readBytes( 1 ) ) ); 221 | 222 | // } 223 | 224 | reader.skip( extraFieldLength ); 225 | // for ( i = 0; i < extraFieldLength; i ++ ) { 226 | 227 | // extraField.push( reader.readBytes( 1 ) ); 228 | 229 | // } 230 | 231 | reader.skip( fileCommentLength ); 232 | // for ( i = 0; i < fileCommentLength; i ++ ) { 233 | 234 | // fileComment.push( reader.readBytes( 1 ) ); 235 | 236 | // } 237 | 238 | }; 239 | 240 | /** 241 | * @class ZipLoader 242 | * @classdesc A class for loading and extracting files from a ZIP archive. 243 | */ 244 | const ZipLoader = class ZipLoader { 245 | 246 | /** 247 | * @function 248 | * @description Loads a zip archive from a File or Blob object and returns a Promise that resolves with a new ZipLoader instance 249 | * @param {Blob|File} blobOrFile - The Blob or File object to load 250 | * @returns {Promise} 251 | */ 252 | static unzip( blobOrFile ) { 253 | 254 | return new Promise( ( resolve ) => { 255 | 256 | const instance = new ZipLoader(); 257 | const fileReader = new FileReader(); 258 | 259 | fileReader.onload = ( event ) => { 260 | 261 | const arrayBuffer = event.target.result; 262 | instance.files = parseZip( arrayBuffer ); 263 | resolve( instance ); 264 | 265 | }; 266 | 267 | if ( blobOrFile instanceof Blob ) { 268 | 269 | fileReader.readAsArrayBuffer( blobOrFile ); 270 | 271 | } 272 | 273 | } ); 274 | 275 | } 276 | 277 | /** 278 | * @constructor 279 | * @param {string} url 280 | * @param {RequestInit} fetchOptions 281 | */ 282 | constructor( url, fetchOptions = {} ) { 283 | 284 | /** @private */ 285 | this._listeners = {}; 286 | 287 | /** @type {String|undefined} */ 288 | this.url = url; 289 | 290 | /** @type {RequestInit} */ 291 | this.fetchOptions = fetchOptions; 292 | 293 | /** @type {import('./types.ts').Files | null} */ 294 | this.files = null; 295 | 296 | } 297 | 298 | /** 299 | * Loads the ZIP archive specified by the url property. 300 | * Returns a Promise that resolves when the ZIP archive has been loaded and extracted. 301 | * 302 | * @async 303 | * @returns {Promise} A Promise that resolves when the ZIP archive has been loaded and extracted. 304 | */ 305 | async load() { 306 | 307 | this.clear(); 308 | 309 | const startTime = Date.now(); 310 | const res = await fetch( this.url, this.fetchOptions ).then( ( res ) => { 311 | 312 | const that = this; 313 | const total = parseInt( res.headers.get( 'content-length' ), 10 ); 314 | let loaded = 0; 315 | 316 | return new Response( new ReadableStream( { 317 | start( controller ) { 318 | const reader = res.body.getReader(); 319 | 320 | const pump = async () => { 321 | const { done, value } = await reader.read(); 322 | if ( done ) { 323 | 324 | controller.close(); 325 | return; 326 | 327 | } 328 | loaded += value.byteLength; 329 | controller.enqueue( value ); 330 | that.dispatch( { 331 | type: 'progress', 332 | loaded, 333 | total, 334 | elapsedTime: Date.now() - startTime, 335 | } ); 336 | pump(); 337 | }; 338 | pump(); 339 | } 340 | } ) ); 341 | 342 | } ).catch( ( error ) => { 343 | 344 | this.dispatch( { 345 | type: 'error', 346 | error 347 | } ); 348 | 349 | } ); 350 | 351 | const arrayBuffer = await res.arrayBuffer(); 352 | this.files = parseZip( arrayBuffer ); 353 | this.dispatch( { 354 | type: 'load', 355 | elapsedTime: Date.now() - startTime, 356 | } ); 357 | 358 | return this.files; 359 | 360 | } 361 | 362 | /** 363 | * Extracts a file from the loaded ZIP archive and returns it as a Blob URL. 364 | * 365 | * @param {string} filename - The name of the file to extract. 366 | * @param {string} type - The MIME type of the file. 367 | * @returns {string} The Blob URL of the extracted file. 368 | */ 369 | extractAsBlobUrl( filename, type ) { 370 | 371 | if ( this.files[ filename ].url ) { 372 | 373 | return this.files[ filename ].url; 374 | 375 | } 376 | 377 | const blob = new Blob( [ this.files[ filename ].buffer ], { type: type } ); 378 | this.files[ filename ].url = URL.createObjectURL( blob ); 379 | return this.files[ filename ].url; 380 | 381 | } 382 | 383 | /** 384 | * @param {string} filename 385 | * @returns {string|undefined} 386 | */ 387 | extractAsText( filename ) { 388 | 389 | const buffer = this.files[ filename ].buffer; 390 | 391 | if ( typeof TextDecoder !== 'undefined' ) { 392 | 393 | return new TextDecoder().decode( buffer ); 394 | 395 | } 396 | 397 | let str = ''; 398 | 399 | for ( let i = 0, l = buffer.length; i < l; i ++ ) { 400 | 401 | str += String.fromCharCode( buffer[ i ] ); 402 | 403 | } 404 | 405 | return decodeURIComponent( escape( str ) ); 406 | 407 | } 408 | 409 | /** 410 | * @param {string} filename 411 | * @returns {*} 412 | */ 413 | extractAsJSON( filename ) { 414 | 415 | return JSON.parse( this.extractAsText( filename ) ); 416 | 417 | } 418 | 419 | /** 420 | * Adds the specified event listener. 421 | * @param {string} type event name 422 | * @param {import('./types.ts').Listener} listener handler function 423 | */ 424 | on( type, listener ) { 425 | 426 | if ( ! this._listeners[ type ] ) { 427 | 428 | this._listeners[ type ] = []; 429 | 430 | } 431 | 432 | if ( this._listeners[ type ].indexOf( listener ) === - 1 ) { 433 | 434 | this._listeners[ type ].push( listener ); 435 | 436 | } 437 | 438 | } 439 | 440 | /** 441 | * Removes the specified event listener 442 | * @param {string} type event name 443 | * @param {import('./types.ts').Listener} listener handler function 444 | */ 445 | off( type, listener ) { 446 | 447 | const listenerArray = this._listeners[ type ]; 448 | 449 | if ( !! listenerArray ) { 450 | 451 | const index = listenerArray.indexOf( listener ); 452 | 453 | if ( index !== - 1 ) { 454 | 455 | listenerArray.splice( index, 1 ); 456 | 457 | } 458 | 459 | } 460 | 461 | } 462 | 463 | dispatch( event ) { 464 | 465 | const listenerArray = this._listeners[ event.type ]; 466 | 467 | if ( !! listenerArray ) { 468 | 469 | event.target = this; 470 | const length = listenerArray.length; 471 | 472 | for ( let i = 0; i < length; i ++ ) { 473 | 474 | listenerArray[ i ].call( this, event ); 475 | 476 | } 477 | 478 | } 479 | 480 | } 481 | 482 | /** @param {string=} filename */ 483 | clear( filename ) { 484 | 485 | if ( !! filename ) { 486 | 487 | URL.revokeObjectURL( this.files[ filename ].url ); 488 | delete this.files[ filename ]; 489 | return; 490 | 491 | } 492 | 493 | for ( let key in this.files ) { 494 | 495 | URL.revokeObjectURL( this.files[ key ].url ); 496 | 497 | } 498 | 499 | this.files = null; 500 | 501 | } 502 | 503 | }; 504 | 505 | export { ZipLoader as default }; 506 | -------------------------------------------------------------------------------- /dist/zip-loader.module.min.js: -------------------------------------------------------------------------------- 1 | /*! 2 | * zip-loader 3 | * https://github.com/yomotsu/ZipLoader 4 | * (c) 2017 @yomotsu 5 | * Released under the MIT License. 6 | * ZipLoader uses pako, released under the MIT license. 7 | */ 8 | var commonjsGlobal=typeof globalThis!=="undefined"?globalThis:typeof window!=="undefined"?window:typeof global!=="undefined"?global:typeof self!=="undefined"?self:{};var pako_inflate_min={exports:{}}; 9 | /*! pako 2.1.0 https://github.com/nodeca/pako @license (MIT AND Zlib) 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file=parseLocalFile(reader);files[file.name]={buffer:file.buffer};continue}if(signature===CENTRAL_DIRECTORY){parseCentralDirectory(reader);continue}break}return files};const parseLocalFile=reader=>{let i=0;let data;reader.skip(4);const compression=reader.readBytes(2);reader.skip(8);const compressedSize=reader.readBytes(4);reader.skip(4);const filenameLength=reader.readBytes(2);const extraFieldLength=reader.readBytes(2);const filename=[];const compressedData=new Uint8Array(compressedSize);for(i=0;i{reader.skip(24);const filenameLength=reader.readBytes(2);const extraFieldLength=reader.readBytes(2);const fileCommentLength=reader.readBytes(2);reader.skip(12);reader.skip(filenameLength);reader.skip(extraFieldLength);reader.skip(fileCommentLength)};const ZipLoader=class ZipLoader{static unzip(blobOrFile){return new Promise((resolve=>{const instance=new ZipLoader;const fileReader=new FileReader;fileReader.onload=event=>{const arrayBuffer=event.target.result;instance.files=parseZip(arrayBuffer);resolve(instance)};if(blobOrFile instanceof Blob){fileReader.readAsArrayBuffer(blobOrFile)}}))}constructor(url,fetchOptions={}){this._listeners={};this.url=url;this.fetchOptions=fetchOptions;this.files=null}async load(){this.clear();const startTime=Date.now();const res=await fetch(this.url,this.fetchOptions).then((res=>{const that=this;const total=parseInt(res.headers.get("content-length"),10);let loaded=0;return new Response(new ReadableStream({start(controller){const reader=res.body.getReader();const pump=async()=>{const{done:done,value:value}=await reader.read();if(done){controller.close();return}loaded+=value.byteLength;controller.enqueue(value);that.dispatch({type:"progress",loaded:loaded,total:total,elapsedTime:Date.now()-startTime});pump()};pump()}}))})).catch((error=>{this.dispatch({type:"error",error:error})}));const arrayBuffer=await res.arrayBuffer();this.files=parseZip(arrayBuffer);this.dispatch({type:"load",elapsedTime:Date.now()-startTime});return this.files}extractAsBlobUrl(filename,type){if(this.files[filename].url){return this.files[filename].url}const blob=new Blob([this.files[filename].buffer],{type:type});this.files[filename].url=URL.createObjectURL(blob);return this.files[filename].url}extractAsText(filename){const buffer=this.files[filename].buffer;if(typeof TextDecoder!=="undefined"){return(new TextDecoder).decode(buffer)}let str="";for(let i=0,l=buffer.length;i 2 | 3 | 4 | 5 | =^.^= 6 | 12 | 13 | 14 |

index

15 |

Load 495 PNGs in one http request

16 |

Zip archive can contain multiple files. That mean you don't need to concern about number of http connections.

17 | 18 | 19 | 20 | 63 | 64 | 65 | 66 | -------------------------------------------------------------------------------- /examples/496_RPG_icons.zip: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/yomotsu/ZipLoader/3075ed397fef2ba23e2415a7b65def9d1b6753f3/examples/496_RPG_icons.zip -------------------------------------------------------------------------------- /examples/basic.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | =^.^= 6 | 7 | 8 |

index

9 |

Check to see your console!

10 |

"basic.zip" which was loaded in this demo contains a JSON file, and it will be extracted into your console.

11 | 12 |

You can compare with original JSON file, that can be seen here

13 | 14 | 15 | 40 | 41 | 42 | 43 | -------------------------------------------------------------------------------- /examples/basic.zip: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/yomotsu/ZipLoader/3075ed397fef2ba23e2415a7b65def9d1b6753f3/examples/basic.zip -------------------------------------------------------------------------------- /examples/basic/data.json: -------------------------------------------------------------------------------- 1 | { 2 | "someText": "hello!", 3 | "someNumber": 1, 4 | "yesOrNo": true 5 | } 6 | -------------------------------------------------------------------------------- /examples/direct-unzip.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | =^.^= 6 | 7 | 8 |

index

9 |

Select a zip file to extract

10 | 11 | select a zip file
12 |
13 | 14 | 15 | 58 | 59 | 60 | 61 | -------------------------------------------------------------------------------- /examples/index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | ZipLoader.js 6 | 8 | 9 | 10 | 11 |

GitHub repo

12 | 13 |

zip-loader.js

14 | 15 |

demos

16 | 22 | 23 | 24 | 25 | -------------------------------------------------------------------------------- /examples/logo.svg: -------------------------------------------------------------------------------- 1 | 2 | -------------------------------------------------------------------------------- /examples/mixed.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | =^.^= 6 | 35 | 36 | 37 |

index

38 |

Multiple file types in 1 zip file

39 | 40 | 41 |
42 |
JPEG image
43 |
44 |
45 | 46 |
47 |
SVG image
48 |
49 |
50 | 51 |
52 |
Video
53 |
54 |
55 | 56 |
57 |
Audio
58 |
59 |
60 | 61 |
62 |
Text
63 | 

 64 | 

 65 | 
 66 | 

 67 | 	
JSON

 68 | 	

 69 | 

 70 | 
 71 | 
 72 | 
 73 | 
 74 | 
178 | 
179 | 
180 | 
181 | 


--------------------------------------------------------------------------------
/examples/mixed.zip:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/yomotsu/ZipLoader/3075ed397fef2ba23e2415a7b65def9d1b6753f3/examples/mixed.zip


--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "zip-loader",
 3 |   "version": "1.3.0",
 4 |   "author": "Yomotsu",
 5 |   "license": "MIT",
 6 |   "repository": "yomotsu/ZipLoader",
 7 |   "main": "dist/zip-loader.js",
 8 |   "jsnext:main": "dist/zip-loader.module.js",
 9 |   "module": "dist/zip-loader.module.js",
10 |   "types": "dist/ZipLoader.d.ts",
11 |   "dependencies": {
12 |     "pako": "^2.1.0"
13 |   },
14 |   "devDependencies": {
15 |     "@rollup/plugin-commonjs": "^25.0.7",
16 |     "@rollup/plugin-node-resolve": "^15.2.3",
17 |     "rollup": "^4.14.2",
18 |     "terser": "^5.30.3",
19 |     "typescript": "^5.4.5"
20 |   },
21 |   "scripts": {
22 |     "dev": "rollup --config --watch",
23 |     "build": "rollup --config && terser 'dist/zip-loader.js' -o 'dist/zip-loader.min.js' --comments '/^!/' && terser 'dist/zip-loader.module.js' -o 'dist/zip-loader.module.min.js' --comments '/^!/'",
24 |     "types": "tsc -p src/ZipLoader.js --declaration --allowJs --emitDeclarationOnly --outDir dist"
25 |   },
26 |   "browserslist": [
27 |     "> 1%",
28 |     "last 3 versions",
29 |     "not dead"
30 |   ]
31 | }
32 | 


--------------------------------------------------------------------------------
/readme.md:
--------------------------------------------------------------------------------
  1 | # ZipLoader
  2 | 
  3 | ZipLoader is a light weight zip file loader and unzipper for Web browsers.
  4 | (only 25KB (gzipped 9KB) )
  5 | 
  6 | Plus, It makes easy to make loading progress bar.
  7 | 
  8 | [![Latest NPM release](https://img.shields.io/npm/v/zip-loader.svg)](https://www.npmjs.com/package/zip-loader)
  9 | ![MIT License](https://img.shields.io/npm/l/zip-loader.svg)
 10 | [![dependencies Status](https://david-dm.org/yomotsu/ZipLoader/status.svg)](https://david-dm.org/yomotsu/ZipLoader)
 11 | [![devDependencies Status](https://david-dm.org/yomotsu/ZipLoader/dev-status.svg)](https://david-dm.org/yomotsu/ZipLoader?type=dev)
 12 | 
 13 | [Demos can be seen here](https://yomotsu.github.io/ZipLoader/examples/).
 14 | 
 15 | ## Usage
 16 | 
 17 | Both standalone version and [NPM module](https://www.npmjs.com/package/zip-loader) version are available.
 18 | 
 19 | ### Standalone
 20 | 
 21 | Copy zip-loader.js from `/dist/zip-loader.js` and place it in your project.
 22 | ```html
 23 | 
 24 | ```
 25 | 
 26 | ### NPM
 27 | ```
 28 | $ npm install --save zip-loader
 29 | ```
 30 | 
 31 | then
 32 | ```javascript
 33 | import ZipLoader from 'zip-loader';
 34 | ```
 35 | 
 36 | ## To load and unzip
 37 | 
 38 | Make a loader instance with a target zip url. Then, `load()` it.
 39 | 
 40 | ```javascript
 41 | const fetchOptions = { /* same as the second argument of `fetch()` */}
 42 | const loader = new ZipLoader( './foldername.zip', fetchOptions );
 43 | loader.load();
 44 | ```
 45 | 
 46 | You can track the loading progress through the `'progress'` event.  
 47 | Once complete, the zip file is automatically unzipped, and the `'load'` event is triggered.  
 48 | As a result, the instance will include a `files` property, which contains the filename and binary buffer
 49 | 
 50 | ```javascript
 51 | const loader = new ZipLoader( './foldername.zip' );
 52 | 
 53 | loader.on( 'progress', ( event ) => {
 54 | 
 55 |   console.log( 'loading', event.loaded, event.total );
 56 | 
 57 | } );
 58 | 
 59 | loader.on( 'load', ( event ) => {
 60 | 
 61 |   console.log( 'loaded!' );
 62 |   console.log( loader.files );
 63 | 
 64 |   const json = loader.extractAsJSON( 'foldername/data.json' );
 65 |   console.log( json );
 66 | 
 67 | } );
 68 | 
 69 | loader.on( 'error', ( event ) => {
 70 | 
 71 |   console.log( 'error', event.error );
 72 | 
 73 | } );
 74 | 
 75 | loader.load();
 76 | ```
 77 | 
 78 | It also returns a `Promise`.
 79 | 
 80 | ```javascript
 81 | const loader = new ZipLoader( './foldername.zip' );
 82 | 
 83 | await loader.load();
 84 | 
 85 | console.log( 'loaded!' );
 86 | console.log( loader.files );
 87 | 
 88 | const json = loader.extractAsJSON( 'foldername/data.json' );
 89 | console.log( json );
 90 | ```
 91 | 
 92 | ## unzip Blob/File directly
 93 | 
 94 | ```javascript
 95 | const zipLoaderInstance = await ZipLoader.unzip( blobOrFile );
 96 | console.log( zipLoaderInstance.files );
 97 | ```
 98 | 
 99 | ## Pick up unzipped files
100 | 
101 | There are 3 (+1) ways to pick up unzipped files.
102 | 
103 | - as a text.
104 | - as a JSON.
105 | - as an URL (for ``, `