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@wijayaerick
wijayaerick / slog_console_handler.go
Last active July 27, 2024 08:05
Example ConsoleHandler for golang.org/x/exp/slog Logger
// ConsoleHandler formats slog.Logger output in console format, a bit similar with Uber's zap ConsoleEncoder
// The log format is designed to be human-readable.
//
// Performance can definitely be improved, however it's not in my priority as
// this should only be used in development environment.
//
// e.g. log output:
// 2022-11-24T11:40:20+08:00 DEBUG ./main.go:162 Debug message {"hello":"world","!BADKEY":"bad kv"}
// 2022-11-24T11:40:20+08:00 INFO ./main.go:167 Info message {"with_key_1":"with_value_1","group_1":{"with_key_2":"with_value_2","hello":"world"}}
// 2022-11-24T11:40:20+08:00 WARN ./main.go:168 Warn message {"with_key_1":"with_value_1","group_1":{"with_key_2":"with_value_2","hello":"world"}}