forked from um/web
158 lines
6.2 KiB
JavaScript
158 lines
6.2 KiB
JavaScript
import {
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AudioMimeType,
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DetectAudioExt,
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GetArrayBuffer,
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GetFileInfo,
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GetMetaCoverURL,
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GetWebImage,
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RequestJsonp
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} from "./util";
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const MetaFlac = require('metaflac-js');
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import {QmcMaskCreate58, QmcMaskDetectMflac, QmcMaskDetectMgg, QmcMaskGetDefault} from "./qmcMask";
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import {fromByteArray as Base64Encode, toByteArray as Base64Decode} from 'base64-js'
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const ID3Writer = require("browser-id3-writer");
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const iconv = require('iconv-lite');
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const decode = iconv.decode
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const musicMetadata = require("music-metadata-browser");
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const HandlerMap = {
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"mgg": {handler: QmcMaskDetectMgg, ext: "ogg", detect: true},
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"mflac": {handler: QmcMaskDetectMflac, ext: "flac", detect: true},
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"qmc0": {handler: QmcMaskGetDefault, ext: "mp3", detect: false},
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"qmc2": {handler: QmcMaskGetDefault, ext: "ogg", detect: false},
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"qmc3": {handler: QmcMaskGetDefault, ext: "mp3", detect: false},
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"qmcogg": {handler: QmcMaskGetDefault, ext: "ogg", detect: false},
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"qmcflac": {handler: QmcMaskGetDefault, ext: "flac", detect: false},
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"bkcmp3": {handler: QmcMaskGetDefault, ext: "mp3", detect: false},
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"bkcflac": {handler: QmcMaskGetDefault, ext: "flac", detect: false},
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"tkm": {handler: QmcMaskGetDefault, ext: "m4a", detect: false}
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};
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export async function Decrypt(file, raw_filename, raw_ext) {
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if (!(raw_ext in HandlerMap)) return {status: false, message: "File type is incorrect!"};
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const handler = HandlerMap[raw_ext];
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const fileData = new Uint8Array(await GetArrayBuffer(file));
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let audioData, seed, keyData;
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if (handler.detect) {
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const keyLen = new DataView(fileData.slice(fileData.length - 4).buffer).getUint32(0, true)
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const keyPos = fileData.length - 4 - keyLen;
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audioData = fileData.slice(0, keyPos);
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seed = handler.handler(audioData);
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keyData = fileData.slice(keyPos, keyPos + keyLen);
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if (seed === undefined) seed = await queryKeyInfo(keyData, raw_filename, raw_ext);
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if (seed === undefined) return {status: false, message: raw_ext + "格式仅提供实验性支持"};
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} else {
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audioData = fileData;
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seed = handler.handler(audioData);
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}
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let musicDecoded = seed.Decrypt(audioData);
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const ext = DetectAudioExt(musicDecoded, handler.ext);
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const mime = AudioMimeType[ext];
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let musicBlob = new Blob([musicDecoded], {type: mime});
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const musicMeta = await musicMetadata.parseBlob(musicBlob);
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for (let metaIdx in musicMeta.native) {
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if (musicMeta.native[metaIdx].some(item => item.id === "TCON" && item.value === "(12)")) {
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musicMeta.common.artist = decode(musicMeta.common.artist, "gbk");
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musicMeta.common.title = decode(musicMeta.common.title, "gbk");
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musicMeta.common.album = decode(musicMeta.common.album, "gbk");
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}
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}
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const info = GetFileInfo(musicMeta.common.artist, musicMeta.common.title, raw_filename);
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if (handler.detect) reportKeyUsage(keyData, seed.Matrix128,
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info.artist, info.title, musicMeta.common.album, raw_filename, raw_ext);
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let imgUrl = GetMetaCoverURL(musicMeta);
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if (imgUrl === "") {
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imgUrl = await queryAlbumCoverImage(info.artist, info.title, musicMeta.common.album);
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if (imgUrl !== "") {
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const imageInfo = await GetWebImage(imgUrl);
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if (imageInfo.url !== "") {
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imgUrl = imageInfo.url
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if (ext === "mp3") {
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let writer = new ID3Writer(musicDecoded)
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writer.setFrame('APIC', {
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type: 3,
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data: imageInfo.buffer,
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description: "Cover",
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})
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writer.addTag();
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musicDecoded = writer.arrayBuffer
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musicBlob = new Blob([musicDecoded], {type: mime});
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} else if (ext === 'flac') {
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const writer = new MetaFlac(Buffer.from(musicDecoded))
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writer.importPictureFromBuffer(Buffer.from(imageInfo.buffer))
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musicDecoded = writer.save()
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musicBlob = new Blob([musicDecoded], {type: mime});
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}
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}
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}
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}
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return {
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status: true,
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title: info.title,
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artist: info.artist,
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ext: ext,
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album: musicMeta.common.album,
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picture: imgUrl,
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file: URL.createObjectURL(musicBlob),
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mime: mime
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}
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}
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function reportKeyUsage(keyData, maskData, artist, title, album, filename, format) {
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fetch("https://stats.ixarea.com/collect/qmcmask/usage", {
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method: "POST",
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headers: {"Content-Type": "application/json"},
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body: JSON.stringify({
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Mask: Base64Encode(new Uint8Array(maskData)), Key: Base64Encode(keyData),
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Artist: artist, Title: title, Album: album, Filename: filename, Format: format
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}),
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}).then().catch()
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}
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async function queryKeyInfo(keyData, filename, format) {
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try {
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const resp = await fetch("https://stats.ixarea.com/collect/qmcmask/query", {
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method: "POST",
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headers: {"Content-Type": "application/json"},
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body: JSON.stringify({Format: format, Key: Base64Encode(keyData), Filename: filename, Type: 44}),
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});
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let data = await resp.json();
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return QmcMaskCreate58(Base64Decode(data.Matrix44));
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} catch (e) {
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console.log(e);
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}
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}
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async function queryAlbumCoverImage(artist, title, album) {
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let song_query_url = "https://c.y.qq.com/soso/fcgi-bin/client_search_cp?n=10&new_json=1&w=" +
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encodeURIComponent(artist + " " + title + " " + album);
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let jsonpData;
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let queriedSong = undefined;
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try {
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jsonpData = await RequestJsonp(song_query_url, "callback");
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queriedSong = jsonpData["data"]["song"]["list"][0];
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} catch (e) {
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console.log(e)
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}
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let imgUrl = "";
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if (!!queriedSong && !!queriedSong["album"]) {
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if (queriedSong["album"]["pmid"] !== undefined) {
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imgUrl = "https://stats.ixarea.com/collect/music/qq-cover/1/" + queriedSong["album"]["pmid"]
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} else if (queriedSong["album"]["id"] !== undefined) {
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imgUrl = "https://stats.ixarea.com/collect/music/qq-cover/2/" + queriedSong["album"]["id"]
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}
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}
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return imgUrl;
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}
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