@@ -87,7 +87,7 @@ func postAuth(srv *Server, version float64, w http.ResponseWriter, r *http.Reque

 	if err != nil {

 		return err

 	}

-	status, err := auth.Login(authConfig)

+	status, err := auth.Login(authConfig, srv.HTTPRequestFactory())

 	if err != nil {

 		return err

 	}

@@ -5,6 +5,7 @@ import (

 	"encoding/json"

 	"errors"

 	"fmt"

+	"github.com/dotcloud/docker/utils"

 	"io/ioutil"

 	"net/http"

 	"os"

@@ -140,7 +141,7 @@ func SaveConfig(configFile *ConfigFile) error {

 }

 // try to register/login to the registry server

-func Login(authConfig *AuthConfig) (string, error) {

+func Login(authConfig *AuthConfig, factory *utils.HTTPRequestFactory) (string, error) {

 	client := &http.Client{}

 	reqStatusCode := 0

 	var status string

@@ -171,7 +172,7 @@ func Login(authConfig *AuthConfig) (string, error) {

 			"Please check your e-mail for a confirmation link.")

 	} else if reqStatusCode == 400 {

 		if string(reqBody) == "\"Username or email already exists\"" {

-			req, err := http.NewRequest("GET", IndexServerAddress()+"users/", nil)

+			req, err := factory.NewRequest("GET", IndexServerAddress()+"users/", nil)

 			req.SetBasicAuth(authConfig.Username, authConfig.Password)

 			resp, err := client.Do(req)

 			if err != nil {

@@ -1173,6 +1173,15 @@ func NewServer(flGraphPath string, autoRestart, enableCors bool, dns ListOpts) (

 	return srv, nil

 }

+func (srv *Server) HTTPRequestFactory() *utils.HTTPRequestFactory {

+	if srv.reqFactory == nil {

+		ud := utils.NewHTTPUserAgentDecorator(srv.versionInfos()...)

+		factory := utils.NewHTTPRequestFactory(ud)

+		srv.reqFactory = factory

+	}

+	return srv.reqFactory

+}

+

 func (srv *Server) LogEvent(action, id string) {

 	now := time.Now().Unix()

 	jm := utils.JSONMessage{Status: action, ID: id, Time: now}