إشعارات Webhook

X-PDFgine-Signature: v1=<hex>

hex = HMAC-SHA256(
        key     = <the secret you registered>,
        message = <X-PDFgine-Timestamp> + "." + <raw request body>
      )            // lower-case hexadecimal

import crypto from "node:crypto";
import express from "express";

const app = express();
const SECRET = process.env.PDFGINE_WEBHOOK_SECRET;
const TOLERANCE_SECONDS = 300;

// يلزم المحتوى الخام: تُبطل express.json() التوقيع لأنها تعيد كتابة JSON.
app.post("/hooks/pdfgine", express.raw({ type: "application/json" }), (req, res) => {
  const timestamp = req.get("X-PDFgine-Timestamp");
  const header = req.get("X-PDFgine-Signature") ?? "";

  const age = Math.abs(Math.floor(Date.now() / 1000) - Number(timestamp));
  if (!timestamp || Number.isNaN(age) || age > TOLERANCE_SECONDS) {
    return res.sendStatus(400);
  }

  const expected = crypto
    .createHmac("sha256", SECRET)
    .update(`${timestamp}.${req.body.toString("utf8")}`)
    .digest("hex");
  const supplied = header.startsWith("v1=") ? header.slice(3) : "";

  const a = Buffer.from(expected, "utf8");
  const b = Buffer.from(supplied, "utf8");
  if (a.length !== b.length || !crypto.timingSafeEqual(a, b)) {
    return res.sendStatus(401);
  }

  const event = JSON.parse(req.body.toString("utf8"));
  console.log(req.get("X-PDFgine-Event"), req.get("X-PDFgine-Delivery"), event);
  res.sendStatus(204);
});

app.MapPost("/hooks/pdfgine", async (HttpRequest request) =>
{
    const int toleranceSeconds = 300;
    var secret = Environment.GetEnvironmentVariable("PDFGINE_WEBHOOK_SECRET")!;

    using var reader = new StreamReader(request.Body);
    var body = await reader.ReadToEndAsync();

    var timestampHeader = request.Headers["X-PDFgine-Timestamp"].ToString();
    if (!long.TryParse(timestampHeader, out var timestamp)
        || Math.Abs(DateTimeOffset.UtcNow.ToUnixTimeSeconds() - timestamp) > toleranceSeconds)
    {
        return Results.BadRequest();
    }

    var expected = Convert.ToHexString(HMACSHA256.HashData(
            Encoding.UTF8.GetBytes(secret),
            Encoding.UTF8.GetBytes($"{timestamp}.{body}")))
        .ToLowerInvariant();

    var header = request.Headers["X-PDFgine-Signature"].ToString();
    var supplied = header.StartsWith("v1=", StringComparison.Ordinal) ? header[3..] : "";
    if (!CryptographicOperations.FixedTimeEquals(
            Encoding.UTF8.GetBytes(expected),
            Encoding.UTF8.GetBytes(supplied)))
    {
        return Results.Unauthorized();
    }

    return Results.NoContent();
});

{
  "id": "evt_8f1c4a7d6b2e4f0a91c3d5e7f9a1b3c5",
  "type": "document.render.succeeded",
  "createdAt": "2026-09-26T14:39:45+00:00",
  "data": {
    "queueId": "queue_fe86ad38402a4909b3b5a7965847924a",
    "batchId": "batch_69c4ecb63f8642628b72bca89d4f280c",
    "status": "succeeded",
    "templateCode": "invoice",
    "format": "pdf",
    "renderJobId": "job_bfae00cc59354089bffd41fa298377b2",
    "documentId": "doc_a96063f5dcd5400286ce9b3be9b0595b",
    "failureCode": null
  }
}

{
  "previewId": "prv_510ff800bbcd4f848b0b769cf37ad4c2",
  "templateCode": "invoice",
  "deviceClass": "desktop",
  "accessedAt": "2026-09-26T14:41:02+00:00",
  "format": "pdf"
}