default_logger.go — fiber Source File

Source Code

package logger

import (
	"fmt"
	"io"
	"os"
	"strconv"

	"github.com/gofiber/fiber/v3"
	"github.com/gofiber/utils/v2"
	"github.com/mattn/go-colorable"
	"github.com/mattn/go-isatty"
	"github.com/valyala/bytebufferpool"
)

// default logger for fiber
func defaultLoggerInstance(c fiber.Ctx, data *Data, cfg *Config) error {
	if cfg == nil {
		cfg = &Config{
			Stream:       os.Stdout,
			Format:       DefaultFormat,
			enableColors: true,
		}
	}
	// Check if Skip is defined and call it.
	// Now, if Skip(c) == true, we SKIP logging:
	if cfg.Skip != nil && cfg.Skip(c) {
		return nil // Skip logging if Skip returns true
	}

	// Alias colors
	colors := c.App().Config().ColorScheme

	// Get new buffer
	buf := bytebufferpool.Get()

	// Default output when no custom Format or io.Writer is given
	if cfg.Format == DefaultFormat {
		// Format error if exist
		formatErr := ""
		if cfg.enableColors {
			if data.ChainErr != nil {
				formatErr = colors.Red + " | " + data.ChainErr.Error() + colors.Reset
			}
			fmt.Fprintf(buf,
				"%s |%s %3d %s| %13v | %15s |%s %-7s %s| %-"+data.ErrPaddingStr+"s %s\n",
				data.Timestamp.Load().(string), //nolint:forcetypeassert,errcheck // Timestamp is always a string
				statusColor(c.Response().StatusCode(), &colors), c.Response().StatusCode(), colors.Reset,
				data.Stop.Sub(data.Start),
				c.IP(),
				methodColor(c.Method(), &colors), c.Method(), colors.Reset,
				c.Path(),
				formatErr,
			)
		} else {
			if data.ChainErr != nil {
				formatErr = " | " + data.ChainErr.Error()
			}

			// Helper function to append fixed-width string with padding
// ... (123 more lines)