Telegram Channel反代

// Custom pathname for the upstream website.

const channel_name = 'channel_name'

const host_name = 'telegram.bestrui.workers.dev'

const icon_url = 'https://image.idealclover.cn/blog/assets/icon.png'

  

const upstream_me = 't.me'

const upstream_org = 'telegram.org'

const upstream_path = '/s/' + channel_name

// const cdn_name = 'cdn5.telesco.pe'

const https = true

  

addEventListener('fetch', event => {

  event.respondWith(fetchAndApply(event.request))

})

  

async function replace_response_text(response) {

  let text = await response.text()

  // replace View Img

  let re2 = new RegExp('/img/tgme/eye(_2x)?.png', 'g')

  text = text.replace(re2, '/static/img/tgme/eye_2x.png')

  // replace channel link

  let re1 = new RegExp('telegram.org/dl', 'g')

  text = text.replace(re1, 't.me/' + channel_name)

  // replace static file

  let i = upstream_org.replace('.', '.')

  let j = host_name + '/static'

  let re = new RegExp(i, 'g')

  text = text.replace(re, j)

  // replace CDN

  // let k = cdn_name.replace('.', '\.');

  // let l = host_name + '/cdn';

  // let re4 = new RegExp(k, 'g')

  // text = text.replace(re4, l);

  // replace icon

  let re3 = new RegExp(

    'data-content=\\\\".\\\\"><img src=\\\\".*?"><\\\\?/i>',

    'g',

  )

  text = text.replace(

    re3,

    '<i class=\\"tgme_widget_message_user_photo bgcolor1\\" data-content=\\"i\\"><img src=\\"' +

      icon_url +

      '\\"></i>',

  )

  let re4 = new RegExp('data-content="."><img src=".*?"><\\/i>', 'g')

  text = text.replace(

    re4,

    '<i class="tgme_widget_message_user_photo bgcolor1" data-content="i"><img src="' +

      icon_url +

      '"></i>',

  )

  return text

}

  

async function fetchAndApply(request) {

  let response = null

  let url = new URL(request.url)

  let url_hostname = url.hostname

  

  if (https == true) {

    url.protocol = 'https:'

  } else {

    url.protocol = 'http:'

  }

  

  var upstream_domain = upstream_me

  

  let pathname = url.pathname

  console.log(pathname)

  if (pathname.startsWith('/static')) {

    upstream_domain = upstream_org

    url.pathname = pathname.replace('/static', '')

    // } else if(pathname.startsWith('/cdn')) {

    //   upstream_domain = cdn_name;

    //   url.pathname = pathname.replace('/cdn', '');

  } else if (pathname == '/') {

    url.pathname = upstream_path

  } else {

    url.pathname = upstream_path + url.pathname

  }

  

  url.host = upstream_domain

  

  let method = request.method

  let request_headers = request.headers

  let new_request_headers = new Headers(request_headers)

  

  new_request_headers.set('Host', url.hostname)

  new_request_headers.set('Referer', url.hostname)

  let original_response = await fetch(url.href, {

    method: method,

    headers: new_request_headers,

  })

  

  let original_response_clone = original_response.clone()

  const content_type = original_response.headers.get('content-type')

  if (content_type.includes('text/') || content_type.includes('json')) {

    let modified = await replace_response_text(original_response_clone)

    // console.log(modified);

    return new Response(modified, {

      status: original_response.status,

      headers: original_response.headers,

    })

  } else {

    return original_response

  }

}