jjwxc-download.js

/*
 * 从 jjwxc.net 下载文章
 * 使用方法：
 * 1. 打开网址 http://www.jjwxc.net/onebook.php?novelid=0000000 （替换000为需要的数字）
 * 2. 打开网页控制台
 * 3. 把这段粘贴进去
 * 4. 等一段时间，浏览器提示你要下载时，确认下载
 */
const decoder = new TextDecoder('gbk');
const parser = new DOMParser();

async function getContent(url) {
  const ab = await fetch(url).then(r=> r.arrayBuffer());
  const html = decoder.decode(ab);
  const dom = parser.parseFromString(html, 'text/html');
  const noveltextNode = dom.querySelector('.noveltext');
  const titleNode = noveltextNode.querySelector('h2');
  const title = titleNode.parentNode.removeChild(titleNode).textContent;
  const noteNode = noveltextNode.querySelector('.readsmall');
  const note = noteNode && noteNode.parentNode.removeChild(noteNode).textContent.trim();
  const text = [...noveltextNode.childNodes].map(x => {
    if (x.nodeType === Node.TEXT_NODE) {
      return x.textContent.replace(/　/g,'<SP!>>').trim().replace(/<SP!>>/g, '　').trimRight();
    }
    if (x.tagName.toUpperCase() === 'BR') return '\n';
    return null;
  }).filter(x => x).join('');
  return `## ${title}\n\n${text}\n\n${note?`--------\n${note}\n\n`:''}`;
}

async function getListContent(list) {
  const result = [], length = list.length;
  for (let index = 0; index < length; index++) {
    console.log('%d / %d', index, length);
    try {
      result.push(await getContent(list[index]));
    } catch (e) {
      console.error(e);
    }
  }
  return result;
}

async function downloadAsText() {
  const content = await getListContent([...document.querySelectorAll('a[itemprop="url"]')])
  const text = '\ufeff' + content.join('\n\n========\n\n').replace(/\n/g, '\r\n');
  const blob = new Blob([text], { type: 'text/plain' });
  const url = URL.createObjectURL(blob);
  const link = document.createElement('a');
  link.href = url;
  const title = document.querySelector('[itemprop="articleSection"]');
  link.download = title.textContent + '.txt';
  document.body.appendChild(link);
  link.click();
  document.body.removeChild(link);
}

downloadAsText()