go-imap/v2 doesn't support context cancellation for in-flight requests #2

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opened 2026-05-10 23:29:25 +02:00 by heiko · 1 comment

heiko commented

2026-05-10 23:29:25 +02:00

Owner

Ctrl+C (SIGINT) cannot immediately abort in-flight IMAP network requests because the go-imap/v2 library doesn't expose context parameters in its command methods.

Current Behavior

✓ New message processing stops immediately
✓ IDLE listener exits gracefully
✗ Hung network requests block indefinitely until timeout

Solutions to Investigate

Switch IMAP library to one with context support
Add per-operation timeouts
Use goroutine killables for requests
Close connection on signal, forcing request failures

internal/imap/client.go - Methods without context support
cmd/scanner/main.go - Signal handling and context setup

Notes

The limitation is fundamental to the go-imap/v2 library design, not a bug in our code.

Ctrl+C (SIGINT) cannot immediately abort in-flight IMAP network requests because the go-imap/v2 library doesn't expose context parameters in its command methods. ## Current Behavior - ✓ New message processing stops immediately - ✓ IDLE listener exits gracefully - ✗ Hung network requests block indefinitely until timeout ## Solutions to Investigate 1. Switch IMAP library to one with context support 2. Add per-operation timeouts 3. Use goroutine killables for requests 4. Close connection on signal, forcing request failures ## Related Code - `internal/imap/client.go` - Methods without context support - `cmd/scanner/main.go` - Signal handling and context setup ## Notes The limitation is fundamental to the go-imap/v2 library design, not a bug in our code.

heiko added the

enhancement

label

2026-05-10 23:36:53 +02:00

heiko changed title from ~~BUG: go-imap/v2 doesn't support context cancellation for in-flight requests~~ to go-imap/v2 doesn't support context cancellation for in-flight requests

2026-05-10 23:37:04 +02:00

heiko commented

2026-05-10 23:38:14 +02:00

Author

Owner

Do we really need an IMAP library? Can't we implement the some IMAP interactions we need in a more generic way. Isn't there a more generic library for text based protocols, like IMAP, SMTP, ...? Or can we create one?

heiko referenced this issue from a commit

2026-05-12 00:14:56 +02:00

fix: force-close IMAP connections on signal for immediate shutdown

heiko closed this issue

2026-05-12 00:15:34 +02:00

heiko referenced this issue from a commit

2026-05-13 17:55:20 +02:00

fix: force-close IMAP connections on signal for immediate shutdown