Archived

This project is archived in favor of the official Fiber slog middleware:

• github.com/gofiber/contrib/fiberslog

This package remains here for existing users, but new projects should prefer the official package above.

It is an opinionated Fiber request logger middleware using slog.

It allows adding attributes from anywhere within the handler.

Usage

Registering middleware with custom config:

app.Use(logger.New(logger.Config{
    // skip logger with filter
    Filter: func(ctx *fiber.Ctx) bool {
        return ctx.Path() == "/exclude"
    },
    // customize attributes with builtin tag
    BuiltinAttrs []string{PathTag,StatusTag}
    // adding custom attributes with custom function
    CustomAttr: []logger.CustomFunc{
		func(c *fiber.Ctx, r *slog.Record, e error) {
            r.AddAttrs(slog.String("custom_key", "custom_value"))
        },
    },
    // assign slog logger
    Logger: slog.Default(),
}))

Adding extra attributes from anywhere within a handler:

router.Post("/", func(ctx *fiber.Ctx) error {
    ...
    logger.AddAttrs(ctx, slog.Any("params", params))
    logger.Add(ctx, "params", params))
    ...
})