HAProxy community

Redirect POST data api http to https

My Server not connect to internet and I can’t use api telegram for alert notification.
I have a HAProxy server and I want it to be an api proxy.
But I can’t redirect request to api.telegram.org
My HAProxy config:

frontend http_vip_6_199
mode http

    capture request header Host len 128
    capture request header User-Agent len 256
    capture request  header Referer len 128

    option forwardfor
    option http-server-close
    option http-keep-alive
    timeout http-keep-alive 3000
    timeout http-request  5000

use_backend api_telegram if { hdr(host) -i api.telegram.org }
redirect scheme https if !{ ssl_fc } { hdr(host) -i api.telegram.org }
backend api_telegram
mode http
server test api.telegram.org:443

and myscript sent telegram msg
curl -i -L
-H “Host: api.telegram.org
-d “chat_id={TELEGRAM_CHAT_ID}" \ -d "text={MESSAGE}”
-d “parse_mode=HTML”
-d “disable_web_page_preview=true”${TELEGRAM_BOT_TOKEN}/sendMessage

HTTP/1.1 400 Bad Request
Server: nginx/1.16.1
Date: Thu, 27 Feb 2020 02:02:39 GMT
Content-Type: application/json
Content-Length: 80
Connection: keep-alive
Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
Access-Control-Allow-Origin: *
Access-Control-Expose-Headers: Content-Length,Content-Type,Date,Server,Connection

{“ok”:false,“error_code”:400,“description”:“Bad Request: message text is empty”}

From your description you are trying to use haproxy to proxy request to api.telegram.org.

I would suggest checking from your haproxy server if you can get out to api.telegram.org.

Secondly you should probably use tcp mode instead of http as this will pass the traffic without any ssl tampering etc.