受信メッセージのWebhook（リスナー）

{
  "event": "message_received",
  "timestamp": "2026-09-16T10:31:12.482913+00:00",
  "webhook_id": 42,
  "whatsapp_client_id": "678",
  "whatsapp_phone": "919812345678",
  "message": {
    "id": "[email protected]_3EB0C1A2B3D4E5F60718",
    "type": "chat",
    "content": "Hi, is my order #4821 out for delivery?",
    "from": "919876543210",
    "from_name": "Aman",
    "to": "919812345678",
    "timestamp": "2026-09-16T10:29:58+00:00",
    "whatsapp_timestamp": 1789554598,
    "direction": "incoming",
    "status": "pending",
    "is_forwarded": false,
    "forwarding_score": 0
  },
  "contact": {
    "whatsapp_id": "[email protected]",
    "phone": "919876543210",
    "name": "Aman",
    "is_group": false,
    "is_business": false
  },
  "organisation": {
    "id": "10314",
    "name": "Acme Stores"
  }
}

{
  "event": "message_sent",
  "timestamp": "2026-09-16T10:33:40.117205+00:00",
  "webhook_id": 42,
  "whatsapp_client_id": "678",
  "whatsapp_phone": "919812345678",
  "message": {
    "id": "[email protected]_3EB0F9E8D7C6B5A40312",
    "type": "chat",
    "content": "Yes, it will reach you today by 6 PM.",
    "from": "919876543210",
    "from_name": "Aman",
    "to": "919812345678",
    "timestamp": "2026-09-16T10:31:04+00:00",
    "whatsapp_timestamp": 1789554664,
    "direction": "outgoing",
    "status": "pending",
    "is_forwarded": false,
    "forwarding_score": 0
  },
  "contact": {
    "whatsapp_id": "[email protected]",
    "phone": "919876543210",
    "name": "Aman",
    "is_group": false,
    "is_business": false
  },
  "organisation": {
    "id": "10314",
    "name": "Acme Stores"
  }
}

{
  "event": "message_received",
  "timestamp": "2026-09-16T10:36:02.904311+00:00",
  "webhook_id": 42,
  "whatsapp_client_id": "678",
  "whatsapp_phone": "919812345678",
  "message": {
    "id": "[email protected]_3EB0A7B6C5D4E3F20109",
    "type": "image",
    "content": "📸 Image",
    "from": "919876543210",
    "from_name": "Aman",
    "to": "919812345678",
    "timestamp": "2026-09-16T10:34:51+00:00",
    "whatsapp_timestamp": 1789554891,
    "direction": "incoming",
    "status": "pending",
    "is_forwarded": false,
    "forwarding_score": 0,
    "media": {
      "filename": "",
      "mimetype": "image/jpeg",
      "size": 245760
    }
  },
  "contact": {
    "whatsapp_id": "[email protected]",
    "phone": "919876543210",
    "name": "Aman",
    "is_group": false,
    "is_business": false
  },
  "organisation": {
    "id": "10314",
    "name": "Acme Stores"
  }
}

{
  "event": "message_received",
  "timestamp": "2026-09-16T10:40:15.330187+00:00",
  "webhook_id": 42,
  "whatsapp_client_id": "678",
  "whatsapp_phone": "919812345678",
  "message": {
    "id": "[email protected][email protected]",
    "type": "chat",
    "content": "Is the store open on Sunday?",
    "from": "120363041234567890",
    "from_name": "Acme Loyalty Club",
    "to": "919812345678",
    "timestamp": "2026-09-16T10:39:02+00:00",
    "whatsapp_timestamp": 1789555142,
    "direction": "incoming",
    "status": "pending",
    "is_forwarded": false,
    "forwarding_score": 0
  },
  "contact": {
    "whatsapp_id": "[email protected]",
    "phone": "120363041234567890",
    "name": "Acme Loyalty Club",
    "is_group": true,
    "is_business": false
  },
  "organisation": {
    "id": "10314",
    "name": "Acme Stores"
  },
  "group": {
    "name": "Acme Loyalty Club"
  }
}

// Express: keep the raw body for this route
import crypto from "node:crypto";
import express from "express";

const app = express();
const SECRET = process.env.WBIZTOOL_WEBHOOK_SECRET;

app.post("/wbiztool/webhook", express.raw({ type: "application/json" }), (req, res) => {
  const expected = "sha256=" + crypto.createHmac("sha256", SECRET).update(req.body).digest("hex");
  const received = req.get("X-Wbiztool-Signature") || "";

  const valid =
    received.length === expected.length &&
    crypto.timingSafeEqual(Buffer.from(received), Buffer.from(expected));
  if (!valid) return res.status(401).send("Invalid signature");

  const data = JSON.parse(req.body.toString("utf8"));
  if (data.event === "message_received") {
    console.log(`New message from ${data.contact.phone}: ${data.message.content}`);
  }
  res.sendStatus(200); // reply quickly; do slow work in the background
});

app.listen(3000);

# Flask
import hashlib
import hmac
import json
import os

from flask import Flask, abort, request

app = Flask(__name__)
SECRET = os.environ["WBIZTOOL_WEBHOOK_SECRET"].encode()


@app.post("/wbiztool/webhook")
def wbiztool_webhook():
    raw_body = request.get_data()  # raw bytes, before parsing
    expected = "sha256=" + hmac.new(SECRET, raw_body, hashlib.sha256).hexdigest()
    received = request.headers.get("X-Wbiztool-Signature", "")
    if not hmac.compare_digest(expected, received):
        abort(401)

    data = json.loads(raw_body)
    if data["event"] == "message_received":
        print(f"New message from {data['contact']['phone']}: {data['message']['content']}")
    return "", 200

<?php
$secret   = getenv('WBIZTOOL_WEBHOOK_SECRET');
$rawBody  = file_get_contents('php://input');
$expected = 'sha256=' . hash_hmac('sha256', $rawBody, $secret);
$received = $_SERVER['HTTP_X_WBIZTOOL_SIGNATURE'] ?? '';

if (!hash_equals($expected, $received)) {
    http_response_code(401);
    exit('Invalid signature');
}

$data = json_decode($rawBody, true);
if ($data['event'] === 'message_received') {
    error_log('New message from ' . $data['contact']['phone'] . ': ' . $data['message']['content']);
}
http_response_code(200);