file-type.js

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f}if(i([80,75])&&(3===t[2]||5===t[2]||7===t[2])&&(4===t[3]||6===t[3]||8===t[3]))return{ext:"zip",mime:"application/zip"};if(i([48,48,48,48,48,48],{offset:148,mask:[248,248,248,248,248,248]})&&tarHeaderChecksumMatches(t))return{ext:"tar",mime:"application/x-tar"};if(i([82,97,114,33,26,7])&&(0===t[6]||1===t[6]))return{ext:"rar",mime:"application/x-rar-compressed"};if(i([31,139,8]))return{ext:"gz",mime:"application/gzip"};if(i([66,90,104]))return{ext:"bz2",mime:"application/x-bzip2"};if(i([55,122,188,175,39,28]))return{ext:"7z",mime:"application/x-7z-compressed"};if(i([120,1]))return{ext:"dmg",mime:"application/x-apple-diskimage"};if(i([102,114,101,101],{offset:4})||i([109,100,97,116],{offset:4})||i([109,111,111,118],{offset:4})||i([119,105,100,101],{offset:4}))return{ext:"mov",mime:"video/quicktime"};if(i([102,116,121,112],{offset:4})&&0!=(96&t[8])&&0!=(96&t[9])&&0!=(96&t[10])&&0!=(96&t[11])){var x=uint8ArrayUtf8ByteString(t,8,12);switch(x){case"mif1":return{ext:"heic",mime:"image/heif"};case"msf1":return{ext:"heic",mime:"image/heif-sequence"};case"heic":case"heix":return{ext:"heic",mime:"image/heic"};case"hevc":case"hevx":return{ext:"heic",mime:"image/heic-sequence"};case"qt  ":return{ext:"mov",mime:"video/quicktime"};case"M4V ":case"M4VH":case"M4VP":return{ext:"m4v",mime:"video/x-m4v"};case"M4P ":return{ext:"m4p",mime:"video/mp4"};case"M4B ":return{ext:"m4b",mime:"audio/mp4"};case"M4A ":return{ext:"m4a",mime:"audio/x-m4a"};case"F4V ":return{ext:"f4v",mime:"video/mp4"};case"F4P ":return{ext:"f4p",mime:"video/mp4"};case"F4A ":return{ext:"f4a",mime:"audio/mp4"};case"F4B ":return{ext:"f4b",mime:"audio/mp4"};default:return x.startsWith("3g")?x.startsWith("3g2")?{ext:"3g2",mime:"video/3gpp2"}:{ext:"3gp",mime:"video/3gpp"}:{ext:"mp4",mime:"video/mp4"}}}if(i([77,84,104,100]))return{ext:"mid",mime:"audio/midi"};if(i([26,69,223,163])){var c=t.subarray(4,4100),l=c.findIndex(function(e,t,i){return 66===i[t]&&130===i[t+1]});if(-1!==l){var d=l+3,g=function(e){return _toConsumableArray(e).every(function(e,t){return c[d+t]===e.charCodeAt(0)})};if(g("matroska"))return{ext:"mkv",mime:"video/x-matroska"};if(g("webm"))return{ext:"webm",mime:"video/webm"}}}if(i([82,73,70,70])){if(i([65,86,73],{offset:8}))return{ext:"avi",mime:"video/vnd.avi"};if(i([87,65,86,69],{offset:8}))return{ext:"wav",mime:"audio/vnd.wave"};if(i([81,76,67,77],{offset:8}))return{ext:"qcp",mime:"audio/qcelp"}}if(i([48,38,178,117,142,102,207,17,166,217])){var v=30;do{var y=readUInt64LE(t,v+16);if(i([145,7,220,183,183,169,207,17,142,230,0,192,12,32,83,101],{offset:v})){if(i([64,158,105,248,77,91,207,17,168,253,0,128,95,92,68,43],{offset:v+24}))return{ext:"wma",mime:"audio/x-ms-wma"};if(i([192,239,25,188,77,91,207,17,168,253,0,128,95,92,68,43],{offset:v+24}))return{ext:"wmv",mime:"video/x-ms-asf"};break}v+=y}while(v+24<=t.length);return{ext:"asf",mime:"application/vnd.ms-asf"}}if(i([0,0,1,186])||i([0,0,1,179]))return{ext:"mpg",mime:"video/mpeg"};for(var b=0;b<2&&b<t.length-16;b++){if(i([73,68,51],{offset:b})||i([255,226],{offset:b,mask:[255,230]}))return{ext:"mp3",mime:"audio/mpeg"};if(i([255,228],{offset:b,mask:[255,230]}))return{ext:"mp2",mime:"audio/mpeg"};if(i([255,248],{offset:b,mask:[255,252]}))return{ext:"mp2",mime:"audio/mpeg"};if(i([255,240],{offset:b,mask:[255,252]}))return{ext:"mp4",mime:"audio/mpeg"}}if(i([79,112,117,115,72,101,97,100],{offset:28}))return{ext:"opus",mime:"audio/opus"};if(i([79,103,103,83]))return i([128,116,104,101,111,114,97],{offset:28})?{ext:"ogv",mime:"video/ogg"}:i([1,118,105,100,101,111,0],{offset:28})?{ext:"ogm",mime:"video/ogg"}:i([127,70,76,65,67],{offset:28})?{ext:"oga",mime:"audio/ogg"}:i([83,112,101,101,120,32,32],{offset:28})?{ext:"spx",mime:"audio/ogg"}:i([1,118,111,114,98,105,115],{offset:28})?{ext:"ogg",mime:"audio/ogg"}:{ext:"ogx",mime:"application/ogg"};if(i([102,76,97,67]))return{ext:"flac",mime:"audio/x-flac"};if(i([77,65,67,32]))return{ext:"ape",mime:"audio/ape"};if(i([119,118,112,107]))return{ext:"wv",mime:"audio/wavpack"};if(i([35,33,65,77,82,10]))return{ext:"amr",mime:"audio/amr"};if(i([37,80,68,70]))return{ext:"pdf",mime:"application/pdf"};if(i([77,90]))return{ext:"exe",mime:"application/x-msdownload"};if((67===t[0]||70===t[0])&&i([87,83],{offset:1}))return{ext:"swf",mime:"application/x-shockwave-flash"};if(i([123,92,114,116,102]))return{ext:"rtf",mime:"application/rtf"};if(i([0,97,115,109]))return{ext:"wasm",mime:"application/wasm"};if(i([119,79,70,70])&&(i([0,1,0,0],{offset:4})||i([79,84,84,79],{offset:4})))return{ext:"woff",mime:"font/woff"};if(i([119,79,70,50])&&(i([0,1,0,0],{offset:4})||i([79,84,84,79],{offset:4})))return{ext:"woff2",mime:"font/woff2"};if(i([76,80],{offset:34})&&(i([0,0,1],{offset:8})||i([1,0,2],{offset:8})||i([2,0,2],{offset:8})))return{ext:"eot",mime:"application/vnd.ms-fontobject"};if(i([0,1,0,0,0]))return{ext:"ttf",mime:"font/ttf"};if(i([79,84,84,79,0]))return{ext:"otf",mime:"font/otf"};if(i([0,0,1,0]))return{ext:"ico",mime:"image/x-icon"};if(i([0,0,2,0]))return{ext:"cur",mime:"image/x-icon"};if(i([70,76,86,1]))return{ext:"flv",mime:"video/x-flv"};if(i([37,33]))return{ext:"ps",mime:"application/postscript"};if(i([253,55,122,88,90,0]))return{ext:"xz",mime:"application/x-xz"};if(i([83,81,76,105]))return{ext:"sqlite",mime:"application/x-sqlite3"};if(i([78,69,83,26]))return{ext:"nes",mime:"application/x-nintendo-nes-rom"};if(i([67,114,50,52]))return{ext:"crx",mime:"application/x-google-chrome-extension"};if(i([77,83,67,70])||i([73,83,99,40]))return{ext:"cab",mime:"application/vnd.ms-cab-compressed"};if(i([33,60,97,114,99,104,62,10,100,101,98,105,97,110,45,98,105,110,97,114,121]))return{ext:"deb",mime:"application/x-deb"};if(i([33,60,97,114,99,104,62]))return{ext:"ar",mime:"application/x-unix-archive"};if(i([237,171,238,219]))return{ext:"rpm",mime:"application/x-rpm"};if(i([31,160])||i([31,157]))return{ext:"Z",mime:"application/x-compress"};if(i([76,90,73,80]))return{ext:"lz",mime:"application/x-lzip"};if(i([208,207,17,224,161,177,26,225]))return{ext:"msi",mime:"application/x-msi"};if(i([6,14,43,52,2,5,1,1,13,1,2,1,1,2]))return{ext:"mxf",mime:"application/mxf"};if(i([71],{offset:4})&&(i([71],{offset:192})||i([71],{offset:196})))return{ext:"mts",mime:"video/mp2t"};if(i([66,76,69,78,68,69,82]))return{ext:"blend",mime:"application/x-blender"};if(i([66,80,71,251]))return{ext:"bpg",mime:"image/bpg"};if(i([0,0,0,12,106,80,32,32,13,10,135,10])){if(i([106,112,50,32],{offset:20}))return{ext:"jp2",mime:"image/jp2"};if(i([106,112,120,32],{offset:20}))return{ext:"jpx",mime:"image/jpx"};if(i([106,112,109,32],{offset:20}))return{ext:"jpm",mime:"image/jpm"};if(i([109,106,112,50],{offset:20}))return{ext:"mj2",mime:"image/mj2"}}return i([70,79,82,77])?{ext:"aif",mime:"audio/aiff"}:r("<?xml ")?{ext:"xml",mime:"application/xml"}:i([66,79,79,75,77,79,66,73],{offset:60})?{ext:"mobi",mime:"application/x-mobipocket-ebook"}:i([171,75,84,88,32,49,49,187,13,10,26,10])?{ext:"ktx",mime:"image/ktx"}:i([68,73,67,77],{offset:128})?{ext:"dcm",mime:"application/dicom"}:i([77,80,43])?{ext:"mpc",mime:"audio/x-musepack"}:i([77,80,67,75])?{ext:"mpc",mime:"audio/x-musepack"}:i([66,69,71,73,78,58])?{ext:"ics",mime:"text/calendar"}:i([103,108,84,70,2,0,0,0])?{ext:"glb",mime:"model/gltf-binary"}:i([212,195,178,161])||i([161,178,195,212])?{ext:"pcap",mime:"application/vnd.tcpdump.pcap"}:i([68,83,68,32])?{ext:"dsf",mime:"audio/x-dsf"}:i([76,0,0,0,1,20,2,0,0,0,0,0,192,0,0,0,0,0,0,70])?{ext:"lnk",mime:"application/x.ms.shortcut"}:i([98,111,111,107,0,0,0,0,109,97,114,107,0,0,0,0])?{ext:"alias",mime:"application/x.apple.alias"}:r("Creative Voice File")?{ext:"voc",mime:"audio/x-voc"}:i([11,119])?{ext:"ac3",mime:"audio/vnd.dolby.dd-raw"}:void 0}};module.exports=fileType,Object.defineProperty(fileType,"minimumBytes",{value:4100}),fileType.stream=function(readableStream){return new Promise(function(resolve,reject){var stream=eval("require")("stream");readableStream.on("error",reject),readableStream.once("readable",function(){var e=new stream.PassThrough,t=readableStream.read(module.exports.minimumBytes)||readableStream.read();try{e.fileType=fileType(t)}catch(i){reject(i)}readableStream.unshift(t),stream.pipeline?resolve(stream.pipeline(readableStream,e,function(){})):resolve(readableStream.pipe(e))})})};
},{"./util":"Y/Oq","buffer":"c0T1"}]},{},["Focm"], null)

{
  const htmlBuffer = new TextEncoder().encode('<html');
  module.exports = (fileType => b => {
    const result = fileType(b);
    if (result) {
      return result;
    } else {
      for (let i = 0; i < b.length; i++) {
        let j;
        for (j = 0; j < htmlBuffer.length; j++) {
          if (b[i + j] !== htmlBuffer[j]) {
            break;
          }
        }
        if (j === htmlBuffer.length) {
          return {ext: 'html', mime: 'text/html'};
        }
      }
      return {ext: '', mime: 'application/octet-stream'};
    }
  })(module.exports);
}

function _getBaseUrl(u, currentBaseUrl = '') {
  let result;
  if (/^file:\/\//.test(u)) {
    result = u;
  } else if (/^(?:data|blob):/.test(u)) {
    result = currentBaseUrl;
  } else {
    const parsedUrl = new URL(u);
    result = (parsedUrl.protocol || 'http:') + '//' + (parsedUrl.host || '127.0.0.1') + (parsedUrl.pathname.replace(/\/[^\/]*\.[^\/]*$/, '') || '/');
    /* const parsedUrl = url.parse(u);
    result = url.format({
      protocol: parsedUrl.protocol || 'http:',
      host: parsedUrl.host || '127.0.0.1',
      pathname: parsedUrl.pathname.replace(/\/[^\/]*\.[^\/]*$/, '') || '/',
    }); */
  }
  if (!/\/$/.test(result) && !/\/[^\/]*?\.[^\/]*?$/.test(result)) {
    result += '/';
  }
  return result;
}
function _normalizeUrl(src, baseUrl) {
  if (/^\/\//.test(src)) {
    src = new url.URL(baseUrl).protocol + src;
  }
  if (!/^(?:https?|data|blob):/.test(src)) {
    return new URL(src, baseUrl).href
      .replace(/^(file:\/\/)\/([a-z]:.*)$/i, '$1$2');
  } else {
    return src;
  }
}
function _findAll(el, fn) {
  const result = [];
  const _recurse = el => {
    if (fn(el)) {
      result.push(el);
    }
    const {childNodes} = el;
    if (childNodes) {
      for (let i = 0; i < childNodes.length; i++) {
        const childNode = childNodes[i];
        _recurse(childNode);
      }
    }
  };
  _recurse(el);
  return result;
}
async function _fetchData(u) {
  if (typeof u === 'string') {
    const res = await fetch(u);
    const arrayBuffer = await res.arrayBuffer();
    const baseUrl = _getBaseUrl(u);
    return {
      arrayBuffer,
      baseUrl,
    };
  } else if (u && u instanceof ArrayBuffer) {
    return {
      arrayBuffer: u,
      baseUrl: 'https://content.exokit.org/',
    };
  } else {
    throw new Error(`could not fetch data`);
  }
}

module.exports = (fileType => async function(u) {
  const {arrayBuffer, baseUrl} = await _fetchData(u);

  const ui = new Uint8Array(arrayBuffer);
  const type = fileType(ui);
  if (type && type.mime === 'text/html') {
    const s = new TextDecoder().decode(ui);
    const el = parse5.parseFragment(s);
    const scripts = _findAll(el, el => el.tagName === 'script');

    const scriptsSrc = scripts.filter(script => script.attrs.some(attr => attr.name === 'src'));
    const srcs = scriptsSrc.map(script => script.attrs.find(attr => attr.name === 'src').value);

    const scriptsInnerHTML = scripts.filter(script => script.childNodes.length > 0 && script.childNodes[0].nodeName === '#text');
    const innerHTMLs = scriptsInnerHTML.map(script => script.childNodes[0].value)
      .concat(await Promise.all(srcs.map(src =>
        fetch(_normalizeUrl(src, baseUrl))
          .then(res => res.text())
      )));

    const hasWebgl = innerHTMLs.some(innerHTML => /['"](?:experimental-)?webgl2?['"]/.test(innerHTML));
    const hasDraw = innerHTMLs.some(innerHTML => /(?:drawElements|drawArrays)/.test(innerHTML));
    if (hasWebgl && hasDraw) {
      type.mime += '+webgl';
    }
  }
  arrayBuffer.type = type;
  return arrayBuffer;
})(module.exports);

window.fetchType = module.exports;

})();