cky-image-public/lib/postimg.js

public image to public host

const fs = require('fs');
const _ = require('lodash');
const async = require('async');
const request = require('request').defaults({
  headers: {
    Origin: 'https://postimages.org',
    Accept: 'application/json',
    'Cache-Control': 'no-cache',
    'X-Requested-With': 'XMLHttpRequest',
    'Referer': 'https://postimages.org/',
    DNT: 1,
    'user-agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.142 Safari/537.36'
  }
})

const cheerio = require('cheerio');

let helper = require('../helper');

function rand_string (e) {
  for (var t = "", i = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789", n = 0; n < e; n++)
    t += i.charAt(Math.floor(Math.random() * i.length));
  return t;
}

let _parse = ($, script, type) => {
  // token=
  //   var text = script.innerText
  //   var sub = text.substr(text.indexOf('token'))
  //   sub = sub.substr(0, sub.indexOf('")'))
  //   sub = sub.substr(sub.lastIndexOf('"'))

  if (!script) return '';

  let text = $(script).html();

  if (!text || text.length == 0) return '';

  let sub = text.substr(text.indexOf(type));
  sub = sub.substr(0, sub.indexOf('")'));
  sub = sub.substr(sub.lastIndexOf('"') + 1);

  return sub;
}

class Postimg {
  constructor (options = {}) {

  }

  upload (imgPath, callback) {
    async.waterfall([
      (next) => {
        request({
          url: 'https://postimages.org',
          method: 'GET'
        }, (err, response, body) => {
          if (err || !body) return next('EGETHOMEPAGE', err);

          let $ = cheerio.load(body);
          let scripts = $('script');
          let data = null;

          _.forEach(scripts, (s) => {
            let innerText = $(s).html();
            if (innerText.indexOf('token') > -1) {
              data = s;
              return false;
            }
          })

          if (!data) return next('EPARSETOKEN');

          let now = new Date();
          let upload_session = rand_string(32);
          let session_upload = now.getTime();
          let ui = `[24,1440,900,"true","","","${now.toLocaleString()}"]`;

          let token = _parse($, data, 'token');
          let upload_referer = _parse($, data, 'upload_referer');

          let options = {
            url: 'https://postimages.org/json/rr',
            method: 'POST',
            formData: {
              file: {
                value: fs.createReadStream(imgPath),
                options: {
                  filename: imgPath,
                  contentType: 'image/jpeg'
                }
              },
              session_upload,
              ui,
              gallery: '',
              token,
              upload_session,
              numfiles: 1,
              upload_referer
            }
          }

          return next(null, options);
        });
      },
      (options, next) => {
        request(options, (err, response, body) => {
          if (err || (response && response.statusCode != 200)) return next('EUPLOADPOSTIMG', err);

          body = helper.safeParse(body);
          if (!body) return next('EPARSEBODY', body);

          /*
          {
            "status": "error",
            "error": "Forbidden"
          }
          */
          /*{"status":"OK","url":"https://postimg.cc/MvyNB6C3/4afce76e"}*/
          if (body.status && body.status == 'error') return callback('EUPLOAD', body);
          return next(null, body);
        });
      },
      // get direct link
      (result, next) => {
        request({
          url: result.url,
          method: 'GET'
        }, (err, response, body) => {
          let $ = cheerio.load(body);

          let link = $('#code_html').attr('value');
          let linkDirect = $('#code_direct').attr('value');
          let linkRemove = $('#code_remove').attr('value');
          let thumbnail = $('#code_web_thumb').attr('value');

          let $$ = cheerio.load(thumbnail);
          let linkThumbnail = $$('img').attr('src');

          result['link'] = link;
          result['linkDirect'] = linkDirect;
          result['linkRemove'] = linkRemove;
          result['linkThumbnail'] = linkThumbnail;

          return next(null, result);
        });
      }
    ], callback);
  }
}

module.exports = Postimg;