如何从Telegram频道接收数据到webhook？

Question

I have set a Telegram webhook to mybot using node.js/express:

app.get('/hook', function (req, res) {    

        url='https://api.telegram.org/bot17xxxxx/setwebhook?url=https://example.com/hook'
            request(url, function (error, response, body) {
                    if (!error && response.statusCode == 200) {
                console.log(body)
              }
            response.emit('close');
            });        
    });

and when I GET https://example.com/hook I could received into my bot console:

{"ok":true,"result":true,"description":"Webhook was set"}

Now I want to receive data from the bot so that when a users visits https://telegram.me/mybot?start=xyz and press /start , the bot should receive xyz in a post to /hook (at least that's my understaning of the procedure)

Here is the route that I have to receive the post:

app.post("/hook", function(req, res) {
            console.log(body);

});

But I see nothing happen in the bot when user visits https://telegram.me/mybot?start=xyz in her browser and presses /start .

What can be wrong here, and how to fix it?

Answer 1

Data comes in req.body on https://example.com/hook . So you need to work with (req.body)

app.post("/hook", function(req, res) {
        console.log(req.body);

});

There will be something like that

{"update_id":1111111111,"message":{"message_id":2222,"from":{"id":333333333333,"is_bot":false,"first_name":"Username","last_name":"Lastname","username":"username","language_code":"en},"chat":{"id":1111111111,"first_name":"Username","last_name":"Lastname","username":"username","type":"private"},"date":1518592199,"text":"xyz"}}

You can if you don't use something like bodyParser bodyParser middleware you should parse it

See simple example. All info in body and text in text

body=JSON.parse(req.body)
text=body.message.text
console.log(body)
console.log(text)