Every article tagged Error Handling, in one place.
Showing 7 articles
Rust has no exceptions. Functions that can fail return Result<T, E> , and the compiler makes sure you deal with the error case. Result and match use std::fs; match fs::read_to_string("config.toml") { Ok(text) => println!("{} bytes", text.len()), Err(e) => epri...
In Go, errors are ordinary values returned alongside results. The pattern is repetitive by design: it keeps every failure path visible. The basic pattern f, err := os.Open("config.json") if err != nil { return fmt.Errorf("open config: %w", err) } defer f.Close...
Every API needs an error format, and many invent their own. Problem Details (RFC 9457, which replaced RFC 7807) is a standard JSON shape for HTTP API errors that clients and tools already understand. The format HTTP/1.1 403 Forbidden Content-Type: application/...
LLM APIs are network services under heavy load, so failures are normal. The trick is knowing which errors to retry and which to surface to the user. Retryable vs non-retryable Retry: 429 rate limit, 5xx server errors, overloaded errors, timeouts and dropped co...
Express 5 finally handles async route handlers properly: if an async handler throws or returns a rejected promise, the error goes to your error middleware. No more express-async-errors or wrapping every route in try/catch. Async handlers just work app.get('/us...
The App Router turns error handling into file conventions. Each route segment can have its own error UI, so one broken widget doesn't take down the whole app. error.tsx: catch unexpected errors // app/dashboard/error.tsx 'use client'; // error boundaries must...
Two related OWASP risks are about what happens when things go wrong: whether your app fails safely, and whether anyone notices an attack in progress. Fail closed When an error happens during a security decision, the safe default is "deny". // Dangerous: an err...
