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headless.js

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+import puppeteer from 'puppeteer';
+import tough from 'tough-cookie';
+import iconv from 'iconv-lite';
+import {load} from 'cheerio';
+import path from 'path';
+import fs from 'fs-extra';
+import dotenv from 'dotenv';
+import { execSync } from 'child_process';
+import {join} from 'path';
+import {jar, chineseToUnicode, downloadFile, gb2312UrlEncode, get, post, parseCookies, reset_cookie_jar} from './utils.js';
+
+dotenv.config();
+
+const host = 'https://mmis.hkpl.gov.hk'
+async function get_list(page) {
+  const url = `${host}/search-result?p_p_id=search_WAR_mmisportalportlet&p_p_lifecycle=0&p_p_state=normal&_search_WAR_mmisportalportlet_keywords=%E5%B7%A5%E5%95%86%E6%99%9A%E5%A0%B1&_search_WAR_mmisportalportlet_hsf=%E5%B7%A5%E5%95%86%E6%99%9A%E5%A0%B1&p_r_p_-1078056564_actual_q=%28%20all_dc.title%3A%28%22%E5%B7%A5%E5%95%86%E6%99%9A%E5%A0%B1%22%29%29%20AND+%28%20verbatim_dc.collection%3A%28%22Old%5C%20HK%5C%20Newspapers%22%29%29&p_r_p_-1078056564_sort_field=dc.publicationdate_bsort&_search_WAR_mmisportalportlet_formDate=1448775486359&_search_WAR_mmisportalportlet_mode=Advanced&p_r_p_-1078056564_curr_page=${page}&p_r_p_-1078056564_new_search=true&p_r_p_-1078056564_sort_order=desc&p_r_p_-1078056564_filter=&_search_WAR_mmisportalportlet_jspPage=%2Fjsp%2Fsearch%2Fcnsc05.jsp`;
+  let html = "";
+  const dir = `./html/list`;
+  const f = join(dir, page + ".html");
+  if (await fs.exists(f)) {
+    console.log("exists", f);
+    html = (await fs.readFile(f)).toString();
+  } else {
+    while (true) {
+      const { data } = await get(url);
+      if (data.indexOf("The system is busy. Please retry later") != -1) {
+        continue;
+      }
+      html = data;
+      const a = html.indexOf("<body");
+      const b = html.indexOf("</body>");
+      html = html.substring(a, b) + "</body>";
+      await fs.writeFile(f, html);
+      break;
+    }
+  }
+
+  const links = load(html)(".result-title a");
+  const inputs = load(html)(".aui-button-input.mmis-button-full");
+  await fs.ensureDir(dir);
+  const res = [];
+  let x = 0;
+  for (const link of links) {
+    res.push({
+      href: link.attribs.href,
+      text: link.children[0].data,
+      id: inputs[x].attribs.onclick.split('ITEM_ID=')[1].split('&')[0],
+    });
+    ++x;
+  }
+  return res;
+}
+
+function page_transform(year, month, day, page) {
+  if (year == 1984 && month == 10 && day == 9 && page == 12)
+    return page.toString().padStart(3, "0")
+  return page.toString().padStart(2, "0")
+}
+async function crawl_by_page(page) {
+  const links = await get_list(page);
+  for (const link of links) {
+    const date_str = link.text.split(" ")[1];
+    let [year, month, day] = date_str.split("-");
+    month = parseInt(month);
+    day = parseInt(day);
+    year = parseInt(year);
+    const dir = join(`./html/newspaper/${year}/${month}/${day}`);
+    const f = join(dir, "index.html");
+    let detail_html = "";
+    if (await fs.exists(f)) {
+      console.log("exists", f);
+      detail_html = (await fs.readFile(f)).toString();
+    } else {
+      await fs.ensureDir(dir);
+      while (true) {
+        const { data: html } = await get(`${host}${link.href}`);
+        if (html.indexOf("The system is busy. Please retry later") != -1) continue;
+        await fs.writeFile(f, html);
+        detail_html = html;
+        break;
+      }
+    }
+
+    const key = 'htmlURL="';
+    const pivot = detail_html.indexOf(key);
+    const viewer_url = `${host}${detail_html.substring(
+      pivot + key.length,
+      detail_html.indexOf('"', pivot + key.length)
+    )}`;
+    const key2 = "initPageLinks(null,";
+    const pivot2 = detail_html.indexOf(key2);
+    const total_page = parseInt(
+      detail_html.substring(
+        pivot2 + key2.length,
+        detail_html.indexOf(",", pivot2 + key2.length)
+      )
+    );
+
+    const search_params = new URLSearchParams("?" + viewer_url.split("?")[1]);
+
+    // fid may mismatch year_month_day. fid is correct.
+    const fid = detail_html.substring(detail_html.indexOf('Bib ID')).split('value-content " > <span>')[1].split('<')[0];
+
+    for (let i = 1; i <= total_page; ++i) {
+      console.log("download img", year, month, day, i, "/", total_page);
+      const img_path = join(dir, i + ".png");
+      if (await fs.exists(img_path)) {
+        console.log("skip");
+        continue;
+      }
+
+      // const encToken = search_params.get("encToken");
+      const encToken =
+      '';
+      const img_url =
+        `https://mmis.hkpl.gov.hk/ebook/viewer?resource=page` +
+        `&item=${search_params.get("item")}` +
+        // `&item=${link.id}` +
+        `&type=` +
+        `&ref=%2FMULTI_IMAGE_INDEX%2F${
+          fid.substring(fid.length - 4)
+        }%2F${
+          fid
+        }%2Fimage%2F${
+          fid
+        }_${
+          page_transform(year, month, day, i)
+        }.png` +
+        `&encToken=${encodeURIComponent(encToken)}`;
+      // console.log(img_url);
+      await downloadFile(img_url, img_path, Infinity);
+    }
+    // const {data: viewer_html} = await get(viewer_url);
+    // console.log(viewer_html);
+    // return;
+  }
+}
+
+
+(async () => {
+  const pages = Math.floor(16191 / 10);
+  const arr = (new Array(pages)).fill(0).map((_, i) => i+1);//.sort(() => Math.random() > 0.5 ? 1 : -1);
+  /*
+  for (let i = 1; i <= pages; ++i) {
+    // console.log(i + "/" + pages);
+    crawl_by_page(i);
+  }
+  */
+  await Promise.all[
+    new Array(10).fill(0).map(async (i) => {
+      while (arr.length) {
+        console.log(arr.length);
+        await crawl_by_page(arr.pop());
+      }
+    })
+  ];
+})();