deeplx for cloundflare workers (DEPRECATED)

deeplx_cloudflare_workers.js

export default {
  async fetch(request, env, ctx) {
    const DEEPL_BASE_URL = 'https://www2.deepl.com/jsonrpc';
    const DEEPLX_TOKEN = env.DEEPLX_TOKEN;
    const headers = new Headers({
      'Content-Type': 'application/json',
      'Accept': '*/*',
      'x-app-os-name': 'iOS',
      'x-app-os-version': '16.3.0',
      'Accept-Language': 'en-US,en;q=0.9',
      'Accept-Encoding': 'gzip, deflate, br',
      'x-app-device': 'iPhone13,2',
      'User-Agent': 'DeepL-iOS/2.9.1 iOS 16.3.0 (iPhone13,2)',
      'x-app-build': '510265',
      'x-app-version': '2.9.1',
      'Connection': 'keep-alive',
    });

    if (request.headers.get('Deeplx-Token') !== DEEPLX_TOKEN) {
      return new Response(JSON.stringify({}),
        { status: 403 });
    }

    const requestData = await request.json();

    const iCount = ((requestData.text || '').split('i').length - 1);
    const id = Math.floor(Math.random() * (8399998 - 8300000) + 8300000) * 1000;
    const timestamp = Date.now();
    const deeplTimestamp = (iCount === 0) ? timestamp : (timestamp - (timestamp % iCount) + iCount);

    const postData = {
      jsonrpc: '2.0',
      method: 'LMT_handle_texts',
      id: id,
      params: {
        texts: [{
          text: requestData.text,
          requestAlternatives: Math.max(Math.min(3, requestData.numberAlternative), 0)
        }],
        splitting: 'newlines',
        lang: {
          source_lang_user_selected: requestData.sourceLang.toUpperCase() || 'AUTO',
          target_lang: requestData.targetLang.toUpperCase() || 'EN',
        },
        timestamp: deeplTimestamp,
      },
    };

    let postDataJson = JSON.stringify(postData);

    if ((id + 5) % 29 === 0 || (id + 3) % 13 === 0) {
      postDataJson = postDataJson.replace('"method":"', '"method" : "');
    } else {
      postDataJson = postDataJson.replace('"method":"', '"method": "');
    }

    console.log(postDataJson);

    return await fetch(DEEPL_BASE_URL,
      { body: postDataJson, method: 'POST', headers: headers });
  },
};