logging body middleware for labstack/echo

example.go

package main

import (
	"bytes"
	"io/ioutil"

	"github.com/labstack/echo"
	"github.com/labstack/echo/engine/standard"
	mw "github.com/labstack/echo/middleware"
)

func logBodyMiddleware(next echo.HandlerFunc) echo.HandlerFunc {
	return func(c echo.Context) error {
		if c.Request().Header().Get("Content-Type") != echo.MIMEApplicationJSON {
			return next(c)
		}

		data, err := ioutil.ReadAll(c.Request().Body())
		if err != nil {
			return err
		}

		c.Logger().Error(string(data))
		c.Request().SetBody(bytes.NewReader(data))

		return next(c)
	}
}

func main() {
	e := echo.New()
	e.Use(
		mw.Recover(),
		//mw.Logger(),
		logBodyMiddleware,
	)

	e.Post("/", func(c echo.Context) error {
		result := struct {
			Message string `json:"message"`
		}{}
		if err := c.Bind(&result); err != nil {
			return err
		}

		return c.JSON(200, result)
	})

	e.Run(standard.New(":3000"))
}

For echo v4:

e.Use(func(next echo.HandlerFunc) echo.HandlerFunc {
	return func(c echo.Context) error {
		if c.Request().Header.Get("Content-Type") != echo.MIMEApplicationJSON {
			return next(c)
		}

		data, err := ioutil.ReadAll(c.Request().Body)
		if err != nil {
			return err
		}

		c.Logger().Error(string(data))
		c.Request().Body = ioutil.NopCloser(bytes.NewReader(data))

		return next(c)
	}
})