163LyricDownloader.user.js

// ==UserScript==
// @name        163LyricDownloader
// @namespace   https://github.com/dodying/Dodying-UserJs
// @include     http://music.163.com/*
// @version     1.00
// @grant       GM_xmlhttpRequest
// @author      dodying
// @namespace   https://github.com/dodying/Dodying-UserJs
// @supportURL  https://github.com/dodying/Dodying-UserJs/issues
// @icon        https://gitee.com/dodying/userJs/raw/master/Logo.png
// @require     https://greasyfork.org/scripts/18532-filesaver/code/FileSaver.js?version=127839
// @require     http://cdn.bootcss.com/jszip/3.0.0/jszip.min.js
// @run-at      document-end
// ==/UserScript==
init();
function init() {
  document.querySelector('.wrap>ul>li.lst').innerHTML = '<span><a><em class="_163LyricDownloader">下载歌词</em></a></span>';
  document.querySelector('._163LyricDownloader').onclick = function () {
    getStatus();
  };
}
function getStatus() {
  const musicHref = window.frames.contentFrame.document.querySelectorAll('.txt>a');
  if (musicHref.length === 0) return;
  const musicAuthor = window.frames.contentFrame.document.querySelectorAll('.text>span');
  const musicStatus = new Object();
  musicStatus.length = musicHref.length;
  const downloadingList = new Array();
  const downloadingNow = new Array();
  let tempId;
  for (let i = 0; i < musicHref.length; i++) {
    tempId = musicHref[i].href.replace(/.*song\?id=/, '');
    musicStatus[tempId] = {
      id: tempId,
      ok: false,
      musicUrl: musicHref[i].href,
      lyricUrl: `http://music.163.com/api/song/media?id=${tempId}`,
      name: musicHref[i].innerText,
      singer: musicAuthor[i].innerText.replace(/\//g, ','),
      lyric: '',
    };
    downloadingList.push(tempId);
  }
  window._status = musicStatus;
  window._list = downloadingList;
  window._now = downloadingNow;
  var isDownloaded = setInterval(() => {
    addDownloadTask();
    if (checkDownloaded()) {
      clearInterval(isDownloaded);
      const zip = new JSZip();
      for (const i in window._status) {
        if (!/^\d+$/.test(i)) continue;
        zip.file(`${window._status[i].singer} - ${window._status[i].name}.lrc`, window._status[i].lyric);
      }
      zip.generateAsync({
        type: 'blob',
      }).then((content) => {
        saveAs(content, `${window.frames.contentFrame.document.querySelector('h2.f-ff2').innerText}.zip`);
      });
    }
  }, 200);
}
function addDownloadTask() {
  for (let i = 0; i < window._now.length; i++) {
    if (!window._now[i].start) {
      window._now[i].start = true;
      getLyric(i);
    }
    if (window._now[i].ok) {
      window._now.splice(i, 1);
      i--;
    }
  }
  if (window._now.length < 10 && window._list.length > 0) {
    window._now.push({
      id: window._list[0],
      start: false,
      ok: false,
    });
    window._list.splice(0, 1);
    addDownloadTask();
  }
}
function getLyric(num) {
  GM_xmlhttpRequest({
    method: 'GET',
    url: `http://music.163.com/api/song/media?id=${window._now[num].id}`,
    timeout: 1500,
    onload(res) {
      window._status[window._now[num].id].lyric = JSON.parse(res.response).lyric;
      window._now[num].ok = true;
      window._status[window._now[num].id].ok = true;
    },
    ontimeout() {
      window._status[window._now[num].id].lyric = '下载超时，请重试';
      window._now[num].ok = true;
      window._status[window._now[num].id].ok = true;
    },
  });
}
function checkDownloaded() {
  let downloaded = 0;
  for (const i in window._status) {
    if (!/^\d+$/.test(i)) continue;
    if (window._status[i].ok) downloaded++;
  }
  if (downloaded === window._status.length) {
    document.title = '歌词下载完成';
    return true;
  }
  document.title = `${downloaded}/${window._status.length}`;
  return false;
}