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8 min readHow to Enable CORS in Express and Next.js
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8 minHow to Verify HubSpot Webhook Signatures
HubSpot signs webhooks with HMAC SHA-256 over method, URL, body and timestamp. A tested Node.js verifier, a Python cross-check and the pitfalls behind 401s.
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8 minHow to Check SSL Certificate Expiration
Pipe openssl s_client into openssl x509 -enddate to see when a server's SSL certificate expires. Plus -checkend for cron, curl, Python, Node and PFX files.
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8 minHow to Use curl: 12 Commands for APIs
curl commands for GET, POST, PUT and DELETE, JSON and form data, bearer tokens, redirects and timing, plus fixes for the errors curl actually throws.
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