gengitkan/internal/route/proxy.go

package route

import (
	"fmt"
	"net/http"
	"net/http/httputil"
	"net/url"

	"forge.cadoles.com/wpetit/gengitkan/internal/config"
	"forge.cadoles.com/wpetit/gengitkan/internal/middleware"
	"github.com/pkg/errors"
	"gitlab.com/wpetit/goweb/middleware/container"
	"gitlab.com/wpetit/goweb/service/session"
)

func proxyAPIRequest(w http.ResponseWriter, r *http.Request) {
	ctn := container.Must(r.Context())
	conf := config.Must(ctn)

	apiBaseURL, err := url.Parse(conf.Gitea.APIBaseURL)
	if err != nil {
		panic(errors.Wrap(err, "could not parse api base url"))
	}

	sess, err := session.Must(ctn).Get(w, r)
	if err != nil {
		panic(errors.Wrap(err, "could not retrieve session"))
	}

	accessToken := sess.Get(middleware.SessionOAuth2AccessToken)

	proxy := httputil.NewSingleHostReverseProxy(apiBaseURL)
	proxy.Director = func(rr *http.Request) {
		rr.Host = apiBaseURL.Host
		rr.URL.Scheme = apiBaseURL.Scheme
		rr.URL.Host = apiBaseURL.Host
		rr.Method = r.Method
		rr.Header.Add("Accept", "application/json")
		rr.Header.Add("Authorization", fmt.Sprintf("token %s", accessToken))
	}

	proxy.ServeHTTP(w, r)
}