Webhooks

import express from 'express';
import { Kavchat, WebhookVerificationError } from '@kavchat/node';

const kavchat = new Kavchat(process.env.KAVCHAT_SECRET_KEY!);

// Use the raw body. A body that was parsed and serialized again will not match the signature.
app.post('/kavchat/webhook', express.raw({ type: 'application/json' }), (req, res) => {
  try {
    const event = kavchat.verifyWebhook(req.body, req.get('Kavchat-Signature'));
    if (event.type === 'ticket.created') console.log('New ticket', event.data.number);
    res.sendStatus(200);
  } catch (err) {
    if (err instanceof WebhookVerificationError) return res.status(400).send(err.code);
    throw err;
  }
});

from flask import Flask, request
from kavchat import WebhookVerificationError

app = Flask(__name__)

@app.post("/kavchat/webhook")
def webhook():
    try:
        # raw bytes: request.get_data() in Flask, request.body in Django
        event = kavchat.verify_webhook(request.get_data(), request.headers.get("Kavchat-Signature"))
    except WebhookVerificationError as err:
        return err.code, 400
    if event["type"] == "ticket.created":
        print("New ticket", event["data"]["number"])
    return "", 200

use Kavchat\WebhookVerificationException;

try {
    $event = $kavchat->verifyWebhook(
        file_get_contents('php://input'),
        $_SERVER['HTTP_KAVCHAT_SIGNATURE'] ?? null,
    );
} catch (WebhookVerificationException $e) {
    http_response_code(400);
    exit($e->errorCode);
}

if ($event->type === 'ticket.created') {
    error_log('New ticket ' . $event->data->number);
}

@PostMapping("/kavchat/webhook")
public ResponseEntity<String> webhook(@RequestBody byte[] body,
                                      @RequestHeader(value = "Kavchat-Signature", required = false) String signature) {
    try {
        WebhookEvent event = kavchat.verifyWebhook(body, signature);
        if ("ticket.created".equals(event.getType())) log.info("New ticket {}", event.getData().getNumber());
        return ResponseEntity.ok("");
    } catch (WebhookVerificationException e) {
        return ResponseEntity.badRequest().body(e.getCode());
    }
}

app.MapPost("/kavchat/webhook", async (HttpRequest request, KavchatClient kavchat) =>
{
    using var ms = new MemoryStream();
    await request.Body.CopyToAsync(ms);
    try
    {
        var evt = kavchat.VerifyWebhook(ms.ToArray(), request.Headers[KavchatWebhook.SignatureHeader]);
        if (evt.Type == "ticket.created") Console.WriteLine($"New ticket {evt.Data.Number}");
        return Results.Ok();
    }
    catch (WebhookVerificationException e)
    {
        return Results.BadRequest(e.Code);
    }
});

http.HandleFunc("/kavchat/webhook", func(w http.ResponseWriter, r *http.Request) {
	body, err := io.ReadAll(io.LimitReader(r.Body, 1<<20))
	if err != nil {
		http.Error(w, "read error", http.StatusBadRequest)
		return
	}
	event, err := client.VerifyWebhook(body, r.Header.Get(kavchat.SignatureHeader))
	var werr *kavchat.WebhookError
	if errors.As(err, &werr) {
		http.Error(w, werr.Code, http.StatusBadRequest)
		return
	}
	if event.Type == "ticket.created" {
		log.Printf("new ticket %d", event.Data.Number)
	}
})

class KavchatWebhooksController < ActionController::API
  def create
    event = KAVCHAT.verify_webhook(request.raw_post, request.headers["Kavchat-Signature"])
    Rails.logger.info("New ticket #{event.data.number}") if event.type == "ticket.created"
    head :ok
  rescue Kavchat::WebhookVerificationError => e
    render plain: e.code, status: :bad_request
  end
end