TLDR: if you want to try my free VPN bot, click this link @hidemail_vpn_bot
I decided to share what I have for my own Outline VPN Server - it simple bot where you can generate a new personal key to access this VPN server.
In the end, you will have Telegram chat id and @nickname of a user (if exist) inside a list of your outline VPN keys, like on cover for this post
Here is all code with a few comments, in general, you only need to create a telegram bot and put a token there, your chat id and outline server URL and Port.
<?php
const TELEGRAM_BOT_TOKEN = 'XXXXX:XXXXX';
const TELEGRAM_BOT_ADMIN_CHAT_ID = 'XXXXX';
const API_PORT = 'PORT';
const API_URL = 'https://XXXXX:PORT/SOMEKEYFROMOUTLINE/';
function sendToTelegram(array $args, $url): void
{
$curl = curl_init();
$urlWithName = $url . urlencode('Name of your server for Outline VPN Client');
$id = $args['message']['chat']['id'];
$lang = $args['message']['from']['language_code'] ?? 'en';
$message = 'Hello! I invite you to connect to my VPN (Outline) serverm so you will get access to the free Internet, wherever you are. Follow the instructions on the link provided in the invitation to download the app and set up your connection.
https://s3.amazonaws.com/outline-vpn/invite.html#' . $url . '
Have problems accessing the invitation link? Write to: @flatroy
Click and copy an access key: `' . $urlWithName . '`
';
$message = urlencode($message);
curl_setopt_array($curl, [
CURLOPT_URL => 'https://api.telegram.org/bot'.TELEGRAM_BOT_TOKEN.'/sendMessage?chat_id=' . $id . '&parse_mode=Markdown&text=' . $message,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
CURLOPT_POSTFIELDS => "",
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
$curl = curl_init();
$id = $args['message']['chat']['id'];
$message = 'new user message: ' . $args['message']['text'] . " from @" . $args['message']['chat']['username'] . ' ' . $args['message']['chat']['id'] . ' ' . $args['message']['chat']['first_name'] . ' - lang: ' . $args['message']['from']['language_code'];
curl_setopt_array($curl, [
CURLOPT_URL => 'https://api.telegram.org/bot'.TELEGRAM_BOT_TOKEN.'/sendMessage?chat_id='.TELEGRAM_BOT_ADMIN_CHAT_ID.'&text=' . $message,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
CURLOPT_POSTFIELDS => "",
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
}
function main(array $args): array
{
$API_PORT = API_PORT;
$API_URL = API_URL;
if ($args['message']['text'] === '/create' || $args['message']['text'] === '/start') {
$name = "@" . $args['message']['chat']['username'] . ' ' . $args['message']['chat']['id'] . ' ' . $args['message']['chat']['first_name'] . ' - from My Bot';
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_PORT => $API_PORT,
CURLOPT_URL => $API_URL . '/access-keys/',
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
CURLOPT_POSTFIELDS => "",
CURLOPT_SSL_VERIFYHOST => false,
CURLOPT_SSL_VERIFYPEER => false,
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
return ["body" => "cURL Error #:" . $err];
} else {
$keys = json_decode($response, true);
foreach ($keys['accessKeys'] as $key) {
if ($key['name'] === $name) {
sendToTelegram($args, $key['accessUrl']);
return ["body" => 'ok'];
}
}
}
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_PORT => $API_PORT,
CURLOPT_URL => $API_URL . '/access-keys/',
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => "",
CURLOPT_SSL_VERIFYHOST => false,
CURLOPT_SSL_VERIFYPEER => false,
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
return ["body" => "cURL Error #:" . $err];
}
echo $response;
$data = json_decode($response, true);
sendToTelegram($args, $data['accessUrl']);
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_PORT => $API_PORT,
CURLOPT_URL => $API_URL . '/access-keys/' . $data['id'] . '/name',
CURLOPT_CUSTOMREQUEST => "PUT",
CURLOPT_POSTFIELDS => "name=" . $name,
CURLOPT_HTTPHEADER => [
"Content-Type: application/x-www-form-urlencoded"
],
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 30,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_SSL_VERIFYHOST => false,
CURLOPT_SSL_VERIFYPEER => false,
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_PORT => $API_PORT,
CURLOPT_URL => $API_URL . '/access-keys/' . $data['id'] . '/data-limit',
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "PUT",
CURLOPT_POSTFIELDS => "{\"limit\":{\n\t\"bytes\": 200000000\n}}",
CURLOPT_HTTPHEADER => [
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}
}
return ["body" => 'ok'];
}
This code is done only to use on DigitalOcean (serverless) functions: you can read about it here - https://www.digitalocean.com/products/functions
Hope it will help anyone, cheers!
