Go Echo middleware that extract user info from Google Auth Token found in Authorization: Bearer header field

gauth.go

package echomw

import (
	"encoding/json"
	"io/ioutil"
	"net/http"

	"github.com/labstack/echo/v4"
	"github.com/labstack/echo/v4/middleware"
	"github.com/reedom/…/pkg/log"
	"github.com/reedom/…/pkg/service"
	"github.com/reedom/…/pkg/webservice"
	"go.uber.org/zap"
)

type OpenIdProfile struct {
	ID            string `json:"id"`
	EMail         string `json:"email"`
	VerifiedEMail bool   `json:"verified_email"`
	Name          string `json:"name"`
	GivenName     string `json:"given_name"`
	FamilyName    string `json:"family_name"`
	Picture       string `json:"picture"`
	Locale        string `json:"locale"`
	HD            string `json:"hd"`
}

func GoogleAuthMiddleware(skipper middleware.Skipper) echo.MiddlewareFunc {
	config := middleware.KeyAuthConfig{
		Skipper:   skipper,
		Validator: googleAuthValidator,
	}
	return middleware.KeyAuthWithConfig(config)
}

func googleAuthValidator(key string, e echo.Context) (bool, error) {
	log.Logger.Info("googleAuthValidator start")
	req, _ := http.NewRequest("GET", "https://www.googleapis.com/oauth2/v1/userinfo?alt=json", nil)
	req.Header.Add("Authorization", "Bearer "+key)
	req.Header.Add("Content-Type", "application/json")

	client := &http.Client{}
	resp, err := client.Do(req)
	if err != nil {
		log.Logger.Info("googleapis returns error", zap.Error(err))
		return false, err
	}

	//noinspection GoUnhandledErrorResult
	defer resp.Body.Close()

	if 400 <= resp.StatusCode {
		log.Logger.Info("googleAuth fail", zap.String("status", resp.Status))
		return false, nil
	}

	body, err := ioutil.ReadAll(resp.Body)
	log.Logger.Info("profile", zap.String("body", string(body)))
	var profile OpenIdProfile
	if err = json.Unmarshal(body, &profile); err != nil {
		log.Logger.Info("json.Unmarshal fail", zap.Error(err))
		return false, err
	}

	user := service.AuthUser{
		Email:  profile.EMail,
		Name:   profile.Name,
		UserID: profile.ID,
	}
	e.Set(webservice.AuthUserKey, user)
	return true, nil
}