新增酷狗歌词翻译

publish/changeLog.md

@@ -2,6 +2,7 @@
 
 - 在歌单详情界面新增播放当前歌单按钮、收藏歌单按钮，注：播放歌单不会将歌曲添加到试听列表
 - 新增`不允许将歌词窗口拖出主屏幕之外`的设置项，默认开启，在连接多个屏幕时想要拖动到其他屏幕时可关闭此设置
+- 新增大部分平台的歌词翻译，感谢 @InoriHimea 提供的[krc解码算法](https://github.com/lyswhut/lx-music-desktop/issues/296#issuecomment-683285784)
 - 新增`显示歌词翻译`设置，默认开启，仅支持某些平台，注：无论该设置是否开启，嵌入或下载歌词时都不会带上翻译
 - 新增`显示切换动画`设置，默认开启，关闭时将基本禁用软件内的所有切换动画
 

src/renderer/utils/music/kg/lyric.js

@@ -1,4 +1,41 @@
 import { httpFetch } from '../../request'
+import { decodeLyric } from './util'
+
+const parseLyric = str => {
+  str = str.replace(/(?:<\d+,\d+,\d+>|\r)/g, '')
+  let trans = str.match(/\[language:([\w=\\/+]+)\]/)
+  let tlyric
+  if (trans) {
+    str = str.replace(/\[language:[\w=\\/+]+\]\n/, '')
+    let json = JSON.parse(Buffer.from(trans[1], 'base64').toString())
+    for (const item of json.content) {
+      if (item.type == 1) {
+        tlyric = item.lyricContent
+        break
+      }
+    }
+  }
+  let i = 0
+  let lyric = str.replace(/\[((\d+),\d+)\].*/g, str => {
+    let result = str.match(/\[((\d+),\d+)\].*/)
+    let time = parseInt(result[2])
+    let ms = time % 1000
+    time /= 1000
+    let h = parseInt(time / 3600).toString().padStart(2, '0')
+    time %= 3600
+    let m = parseInt(time / 60).toString().padStart(2, '0')
+    time %= 60
+    let s = parseInt(time).toString().padStart(2, '0')
+    time = `${h}:${m}:${s}.${ms}`
+    if (tlyric) tlyric[i] = `[${time}]${tlyric[i++][0]}`
+    return str.replace(result[1], time)
+  })
+  tlyric = tlyric ? tlyric.join('\n') : ''
+  return {
+    lyric,
+    tlyric,
+  }
+}
 
 export default {
   getIntv(interval) {
@@ -11,8 +48,30 @@ export default {
     }
     return parseInt(intv)
   },
-  getLyric(songInfo, tryNum = 0) {
-    let requestObj = httpFetch(`http://m.kugou.com/app/i/krc.php?cmd=100&keyword=${encodeURIComponent(songInfo.name)}&hash=${songInfo.hash}&timelength=${songInfo._interval || this.getIntv(songInfo.interval)}&d=0.38664927426725626`, {
+  // getLyric(songInfo, tryNum = 0) {
+  //   let requestObj = httpFetch(`http://m.kugou.com/app/i/krc.php?cmd=100&keyword=${encodeURIComponent(songInfo.name)}&hash=${songInfo.hash}&timelength=${songInfo._interval || this.getIntv(songInfo.interval)}&d=0.38664927426725626`, {
+  //     headers: {
+  //       'KG-RC': 1,
+  //       'KG-THash': 'expand_search_manager.cpp:852736169:451',
+  //       'User-Agent': 'KuGou2012-9020-ExpandSearchManager',
+  //     },
+  //   })
+  //   requestObj.promise = requestObj.promise.then(({ body, statusCode }) => {
+  //     if (statusCode !== 200) {
+  //       if (tryNum > 5) return Promise.reject('歌词获取失败')
+  //       let tryRequestObj = this.getLyric(songInfo, ++tryNum)
+  //       requestObj.cancelHttp = tryRequestObj.cancelHttp.bind(tryRequestObj)
+  //       return tryRequestObj.promise
+  //     }
+  //     return {
+  //       lyric: body,
+  //       tlyric: '',
+  //     }
+  //   })
+  //   return requestObj
+  // },
+  searchLyric(name, hash, time, tryNum = 0) {
+    let requestObj = httpFetch(`http://lyrics.kugou.com/search?ver=1&man=yes&client=pc&keyword=${encodeURIComponent(name)}&hash=${hash}&timelength=${time}`, {
       headers: {
         'KG-RC': 1,
         'KG-THash': 'expand_search_manager.cpp:852736169:451',
@@ -22,14 +81,49 @@ export default {
     requestObj.promise = requestObj.promise.then(({ body, statusCode }) => {
       if (statusCode !== 200) {
         if (tryNum > 5) return Promise.reject('歌词获取失败')
-        let tryRequestObj = this.getLyric(songInfo, ++tryNum)
+        let tryRequestObj = this.searchLyric(name, hash, time, ++tryNum)
         requestObj.cancelHttp = tryRequestObj.cancelHttp.bind(tryRequestObj)
         return tryRequestObj.promise
       }
-      return {
-        lyric: body,
-        tlyric: '',
+      if (body.candidates.length) {
+        let info = body.candidates[0]
+        return { id: info.id, accessKey: info.accesskey }
       }
+      return null
+    })
+    return requestObj
+  },
+  getLyricDownload(id, accessKey, tryNum = 0) {
+    let requestObj = httpFetch(`http://lyrics.kugou.com/download?ver=1&client=pc&id=${id}&accesskey=${accessKey}&fmt=krc&charset=utf8`, {
+      headers: {
+        'KG-RC': 1,
+        'KG-THash': 'expand_search_manager.cpp:852736169:451',
+        'User-Agent': 'KuGou2012-9020-ExpandSearchManager',
+      },
+    })
+    requestObj.promise = requestObj.promise.then(({ body, statusCode }) => {
+      if (statusCode !== 200) {
+        if (tryNum > 5) return Promise.reject('歌词获取失败')
+        let tryRequestObj = this.getLyric(id, accessKey, ++tryNum)
+        requestObj.cancelHttp = tryRequestObj.cancelHttp.bind(tryRequestObj)
+        return tryRequestObj.promise
+      }
+
+      return decodeLyric(body.content).then(result => parseLyric(result))
+    })
+    return requestObj
+  },
+  getLyric(songInfo, tryNum = 0) {
+    let requestObj = this.searchLyric(songInfo.name, songInfo.hash, songInfo._interval || this.getIntv(songInfo.interval))
+
+    requestObj.promise = requestObj.promise.then(result => {
+      if (!result) return { lyric: '', tlyric: '' }
+
+      let requestObj2 = this.getLyricDownload(result.id, result.accessKey)
+
+      requestObj.cancelHttp = requestObj2.cancelHttp.bind(requestObj2)
+
+      return requestObj2.promise
     })
     return requestObj
   },

src/renderer/utils/music/kg/util.js

@@ -0,0 +1,19 @@
+import { inflate } from 'zlib'
+
+// https://github.com/lyswhut/lx-music-desktop/issues/296#issuecomment-683285784
+const enc_key = Buffer.from([0x40, 0x47, 0x61, 0x77, 0x5e, 0x32, 0x74, 0x47, 0x51, 0x36, 0x31, 0x2d, 0xce, 0xd2, 0x6e, 0x69], 'binary')
+export const decodeLyric = str => new Promise((resolve, reject) => {
+  if (!str.length) return
+  const buf_str = Buffer.from(str, 'base64').slice(4)
+  for (let i = 0, len = buf_str.length; i < len; i++) {
+    buf_str[i] = buf_str[i] ^ enc_key[i % 16]
+  }
+  inflate(buf_str, (err, result) => {
+    if (err) return reject(err)
+    resolve(result.toString())
+  })
+})
+
+// s.content[0].lyricContent.forEach(([str]) => {
+//   console.log(str)
+// })