golang-context

Fix broken Go context cancellation chains by enforcing ctx-first parameter conventions and ensuring the same context flows from entry points through every downstream operation. This prevents leaked resources and lost cancellation signals in request processing.

Safely pass request-scoped values in Go by using unexported key types for context.WithValue and limiting values to request metadata like trace IDs. This approach prevents key collisions and maintains type safety across API boundaries.

Run background goroutines that outlive requests by using context.WithoutCancel, which allows work to continue after the request completes while preserving context values. This prevents premature cancellation of necessary cleanup or async tasks.

Handle non-blocking cleanup on cancellation in Go 1.21+ by using context.AfterFunc. This registers a callback executed when the context is cancelled, allowing graceful resource release without blocking the main goroutine.

Prevent context leaks in Go by calling the cancel function returned by context.WithTimeout or WithCancel immediately when the operation completes. This ensures derived contexts are properly cleaned up and avoids lingering goroutines.

Use context correctly with database calls in Go by passing the request context to QueryContext or ExecContext methods. This ensures database operations respect cancellation and deadlines, properly terminating long-running queries when the request is cancelled.