Golang echo framework logging with (extended) common log format like nginx/Apache.

clf.go

import (
	"github.com/labstack/echo/v4"
	"github.com/labstack/echo/v4/middleware"
)

func Serve() {
	e := echo.New()

	// Common Log Format
	logFormat := `${remote_ip} - - [${time_custom}] "${method} ${path} ${protocol}" ${status} ${bytes_out}`
	customTimeFormat := "2/Jan/2006:15:04:05 -0700"
	if extended {
		// NCSA extended/combined log format
		logFormat += ` "${referer}" "${user_agent}"`
	}
	logFormat += "\n"
	e.Use(middleware.LoggerWithConfig(middleware.LoggerConfig{
		Format:           logFormat,
		CustomTimeFormat: customTimeFormat,
	}))

	// ...
}