snowy-yang
66d06ef48a
- 四平台 tipSearch 全部删除（永不做搜索联想），types 同步去掉 tipSearch 字段 - 歌词解码器归位：kg/krcDecode、tx/qrcDecode、kw/lyricDecode（原 common/ 下三处） - rendererIpc/ipcNames IPC 桥删除，SDK 纯服务端化 - supportQuality 由各平台 apis 内联导出（sdk/index 汇总），kg/kw/tx/wy 改直连 apis/*，api-source 旧层移除
49 lines
1.5 KiB
TypeScript
49 lines
1.5 KiB
TypeScript
// 酷我歌词解码（原主进程 IPC 处理器的纯 JS 实现）
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// - 酷我歌词（inflate + yeelion XOR + gb18030）
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// 算法来源: kw 桌面端歌词解码实现
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import zlib from 'node:zlib'
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import iconv from 'iconv-lite'
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const handleInflate = (data: Buffer): Promise<Buffer> => new Promise((resolve, reject) => {
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zlib.inflate(data, (err, result) => {
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if (err) return reject(err)
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resolve(result)
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})
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})
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const buf_key = Buffer.from('yeelion')
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const buf_key_len = buf_key.length
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const decodeKwLyric = async(buf, isGetLyricx) => {
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if (buf.toString('utf8', 0, 10) != 'tp=content') return ''
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const lrcData = await handleInflate(buf.subarray(buf.indexOf('\r\n\r\n') + 4))
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if (!isGetLyricx) return iconv.decode(lrcData, 'gb18030')
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const buf_str = Buffer.from(lrcData.toString(), 'base64')
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const buf_str_len = buf_str.length
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const output = new Uint8Array(buf_str_len)
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let i = 0
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while (i < buf_str_len) {
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let j = 0
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while (j < buf_key_len && i < buf_str_len) {
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output[i] = buf_str[i] ^ buf_key[j]
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i++
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j++
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}
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}
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return iconv.decode(Buffer.from(output), 'gb18030')
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}
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/**
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* 酷我歌词解码
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* @param {{ lrcBase64: string, isGetLyricx: boolean }} params
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* @returns {Promise<string>} 解码后歌词的 base64
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*/
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export const handleKwDecodeLyric = async({ lrcBase64, isGetLyricx }) => {
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const lrc = await decodeKwLyric(Buffer.from(lrcBase64, 'base64'), isGetLyricx)
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return Buffer.from(lrc).toString('base64')
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}
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