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Resolve panic in the console writer for short level field values #665

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merged 1 commit into from Apr 24, 2024

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ndk
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@ndk ndk commented Apr 9, 2024

This PR fixes an issue in the zerolog console writer. Specifying a non-typical value for the level field, resulting in a serialized value of less than 3 bytes, causes a panic. For instance:

log := zerolog.New(zerolog.NewConsoleWriter())
log.Debug().Str("level", "-").Msg("Hello World")

@ndk ndk changed the title Resolve Panic in zerolog for Short level Field Values Resolve panic in zerolog for short level field values Apr 9, 2024
console.go Outdated
@@ -401,21 +401,38 @@ func consoleDefaultFormatTimestamp(timeFormat string, location *time.Location, n
}

func consoleDefaultFormatLevel(noColor bool) Formatter {
prefix := func(s string) string {
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Why isn't this a top level function?

console.go Outdated
Comment on lines 420 to 424
if len(ll) == 0 {
l = unknownLevel
} else {
l = strings.ToUpper(prefix(ll))
}
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What about making all this logic a function instead of just prefix?

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Done :)

@ndk ndk marked this pull request as draft April 10, 2024 07:38
@ndk ndk marked this pull request as ready for review April 10, 2024 07:38
@ndk ndk changed the title Resolve panic in zerolog for short level field values Resolve panic in the console writer for short level field values Apr 10, 2024
@ndk ndk requested a review from rs April 11, 2024 13:32
console.go Outdated
@@ -401,24 +401,29 @@ func consoleDefaultFormatTimestamp(timeFormat string, location *time.Location, n
}

func consoleDefaultFormatLevel(noColor bool) Formatter {
const unknownLevel = "???"
stripLevel := func(ll string) string {
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Any reason for this function not to be top level?

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@ndk ndk Apr 12, 2024

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By default, I try to reduce the scope of visibility as much as possible (especially when the stuff is too specific and doesn't look like it's to be reused elsewhere), but I don't have any strong preferences. So, if you think it's better to extract it from the function to the package I'll do it promptly. :)

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I prefer smaller unit functions as they enhance readability and do not eliminate the possibility of inlining.

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Sure. Done. :)

@rs rs merged commit 0efa414 into rs:master Apr 24, 2024
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2 participants