Application Error Tracking

app.use((err, req, res, next) => {
  const priority = err.status >= 500 ? 5 : 3;

  fetch("https://app.alphorn.dev/api/webhooks/wh_abc123", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({
      title: `${err.name}: ${err.message}`,
      message: `${req.method} ${req.path}\n\nStack:\n${err.stack?.slice(0, 500)}`,
      priority,
      tags: ["error", `http-${err.status || 500}`, "backend"],
    }),
  }).catch(() => {}); // Don't block the error response

  res.status(err.status || 500).json({ error: "Internal server error" });
});

import traceback
import requests

def notify_error(exc, context=""):
    requests.post(
        "https://app.alphorn.dev/api/webhooks/wh_abc123",
        json={
            "title": f"{type(exc).__name__}: {str(exc)[:100]}",
            "message": f"{context}\n\n{traceback.format_exc()[:500]}",
            "priority": 5,
            "tags": ["error", "exception", "backend"],
        },
        timeout=5,
    )

# Usage
try:
    process_payment(order)
except Exception as e:
    notify_error(e, context=f"Processing order {order.id}")
    raise

window.addEventListener("error", (event) => {
  fetch("https://app.alphorn.dev/api/webhooks/wh_abc123", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({
      title: `Frontend error: ${event.message}`,
      message: `${event.filename}:${event.lineno}\n\nUser-Agent: ${navigator.userAgent}`,
      priority: 3,
      tags: ["error", "frontend"],
    }),
  });
});