How does one make a Telegram MTProto protocol api call?

Question

For instance to call/wrap the auth.sentCode method (link below):

https://core.telegram.org/method/auth.sendCode

I have tried:

var url = "https://149.154.167.40";  
var data = "(auth.sendCode \"PHONE_CODE+NO\" 0 APP_ID \"SECRET_HASH\" \"en\")";  
using (var wc = new WebClient())  
{  
var result = wc.UploadData(url, GetBytes(data));  
}

I get this exception (and inner exception)

The underlying connection was closed: An unexpected error occurred on a send. (Authentication failed because the remote party has closed the transport stream.)

I have no experience with this protocol, but most of the time I see exceptions like that it's an SSL/TLS issue. I see you're using a hard-coded IP - is it possible there's self-signed certificates that your app is rejecting? (Alternatively: does that endpoint definitely support https? I've gotten similar errors from sending https requests to an http endpoint.) — Chris Hayes, May 19 '15 at 08:08
i think till now no example, just unimplemented lib's at githhub — Khalid Omar, May 23 '15 at 11:54
I have posted some code (in vb.net) to get you started here http://stackoverflow.com/a/32809138/44080 — Charles Okwuagwu, Sep 30 '15 at 18:03

score 5 · Accepted Answer · edited May 23 '17 at 12:25

5

You an get started with this SO post

You would need to understand how to generate an AuthKey first.

The Telegram-API documentation is not very well written, but if you keep studying it... you eventually get the hand of it.

Working through generating the AuthKey would help you build up a pattern and functions that you can then use to tackle the rest of the API

Cheers.

edited May 23 '17 at 12:25

Community

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answered Sep 30 '15 at 18:01

Charles Okwuagwu

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score 1 · Answer 2 · answered May 30 '15 at 18:22

If you try to access to https://149.154.167.40 via a Web Browser, you can see that the https protocol is not enabled. If you look at here, there are a list of subdomains that implements https, you could try one of those to make your api request. I'm not really sure that telegram blocks your request due to the CROSS-ORIGIN policy, because the access-control-allow-origin:* header is present in the response. If that doesn't work, you could implement your own handshake like the android application does in here. I hope this help you.

score 1 · Answer 3 · answered Feb 18 '16 at 08:19

1

Use TLSharp. To authenticate user, just run this code

   var hash = await client.SendCodeRequest(phoneNumber);

   var code = "1234"; //code that you receive from Telegram 

   var user = await client.MakeAuth(phoneNumber, hash, code);

answered Feb 18 '16 at 08:19

Ilia P

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How does one make a Telegram MTProto protocol api call?

3 Answers3