go 46 lines · 7 steps

Handling batched webhooks in Gin

A Gin handler that validates, authenticates, and enqueues a batch of webhook events for asynchronous processing.

Explained by highlit
Gin Intermediate webhooks signature-verification job-queue validation http-status-codes
1func (h *WebhookHandler) HandleBatch(c *gin.Context) {
2 var payload BatchWebhookPayload
3 if err := c.ShouldBindJSON(&payload); err != nil {
4 c.JSON(http.StatusBadRequest, gin.H{"error": "invalid payload"})
5 return
6 }
7 
8 sig := c.GetHeader("X-Signature-256")
9 if !h.verifier.Valid(sig, payload.Raw) {
10 c.JSON(http.StatusUnauthorized, gin.H{"error": "signature mismatch"})
11 return
12 }
13 
14 if len(payload.Events) == 0 {
15 c.JSON(http.StatusAccepted, gin.H{"accepted": 0, "batch_id": payload.BatchID})
16 return
17 }
18 
19 batchID := payload.BatchID
20 receivedAt := time.Now().UTC()
21 
22 for _, ev := range payload.Events {
23 job := WebhookJob{
24 BatchID: batchID,
25 EventID: ev.ID,
26 Type: ev.Type,
27 Data: ev.Data,
28 ReceivedAt: receivedAt,
29 }
30 if err := h.dispatcher.Enqueue(c.Request.Context(), job); err != nil {
31 h.logger.Error("enqueue failed",
32 zap.String("batch_id", batchID),
33 zap.String("event_id", ev.ID),
34 zap.Error(err),
35 )
36 c.JSON(http.StatusServiceUnavailable, gin.H{"error": "unable to accept batch"})
37 return
38 }
39 }
40 
41 c.JSON(http.StatusAccepted, gin.H{
42 "batch_id": batchID,
43 "accepted": len(payload.Events),
44 "status": "queued",
45 })
46}
01 / 01
STEP 01

Walkthrough

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Three takeaways
  1. 1Validate structure and authenticate the sender before trusting any part of a webhook request.
  2. 2Returning distinct HTTP status codes lets the caller know whether to retry, resend, or give up.
  3. 3Enqueuing work rather than processing it inline keeps webhook endpoints fast and resilient.

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