/
userhandler.go
191 lines (159 loc) · 4.55 KB
/
userhandler.go
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package main
import (
"encoding/json"
"log"
"net/http"
"os"
"strings"
goboardcookie "github.com/dguihal/goboard/cookie"
goboarduser "github.com/dguihal/goboard/user"
)
// UserHandler represents the handler of user URLs
type UserHandler struct {
GoBoardHandler
cookieDurationD int
logger *log.Logger
}
// NewUserHandler creates an UserHandler object
func NewUserHandler(cookieDuration int) (u *UserHandler) {
u = &UserHandler{}
u.logger = log.New(os.Stdout, "", log.Ldate|log.Ltime|log.Lshortfile)
u.supportedOps = []SupportedOp{
{"/user/add", "/user/add", "POST", u.addUser}, // Add a user
{"/user/login", "/user/login", "POST", u.authUser}, // Authenticate a user
{"/user/logout", "/user/logout", "GET", u.unAuthUser}, // Unauthenticate a user
{"/user/whoami", "/user/whoami", "GET", u.whoAmI}, // Get self account infos
}
u.cookieDurationD = cookieDuration
u.BasePath = ""
return
}
func (u *UserHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
for _, op := range u.supportedOps {
if r.Method == op.Method && strings.HasPrefix(r.URL.Path, u.BasePath+op.PathBase) {
// Call specific handling method
op.handler(w, r)
return
}
}
}
func (u *UserHandler) addUser(w http.ResponseWriter, r *http.Request) {
r.ParseForm()
var login, passwd string = "", ""
if login = r.FormValue("login"); len(login) == 0 {
w.WriteHeader(http.StatusBadRequest)
w.Write([]byte("Login can't be empty"))
return
}
if passwd = r.FormValue("password"); len(passwd) == 0 {
w.WriteHeader(http.StatusBadRequest)
w.Write([]byte("Password can't be empty"))
return
}
err := goboarduser.AddUser(u.Db, login, passwd)
if err == nil {
// User created : Send him a cookie
if cookie, err := goboardcookie.ForUser(u.Db, login, u.cookieDurationD); err == nil {
http.SetCookie(w, &cookie)
w.WriteHeader(http.StatusOK)
return
}
} else {
if uerr, ok := err.(*goboarduser.UserError); ok {
if uerr.ErrCode == goboarduser.UserAlreadyExistsError {
w.WriteHeader(http.StatusConflict)
w.Write([]byte("User login already exists"))
return
}
}
}
w.WriteHeader(http.StatusInternalServerError)
u.logger.Println(err.Error())
return
}
func (u *UserHandler) authUser(w http.ResponseWriter, r *http.Request) {
r.ParseForm()
var login, passwd string = "", ""
if login = r.FormValue("login"); len(login) == 0 {
w.WriteHeader(http.StatusBadRequest)
w.Write([]byte("Login can't be empty"))
return
}
if passwd = r.FormValue("password"); len(passwd) == 0 {
w.WriteHeader(http.StatusBadRequest)
w.Write([]byte("Password can't be empty"))
return
}
if err := goboarduser.AuthUser(u.Db, login, passwd); err != nil {
u.logger.Println(err.Error())
if uerr, ok := err.(*goboarduser.UserError); ok {
switch uerr.ErrCode {
case goboarduser.AuthenticationFailed:
w.WriteHeader(http.StatusUnauthorized)
case goboarduser.DatabaseError:
w.WriteHeader(http.StatusInternalServerError)
u.logger.Println(err.Error())
}
} else {
w.WriteHeader(http.StatusInternalServerError)
u.logger.Println(err.Error())
}
} else {
var cookie http.Cookie
var user goboarduser.User
var userJSON []byte
var err error
// User authenticated : Send him a cookie
if cookie, err = goboardcookie.ForUser(u.Db, login, u.cookieDurationD); err == nil {
if user, err = goboarduser.GetUser(u.Db, login); err == nil {
userJSON, err = json.Marshal(user)
}
}
u.logger.Println(cookie)
u.logger.Println(err)
if err == nil {
http.SetCookie(w, &cookie)
w.WriteHeader(http.StatusOK)
w.Write(userJSON)
} else {
w.WriteHeader(http.StatusInternalServerError)
u.logger.Println(err.Error())
}
}
}
func (u *UserHandler) unAuthUser(w http.ResponseWriter, r *http.Request) {
for _, cookie := range r.Cookies() {
cookie.MaxAge = 0
cookie.Value = ""
cookie.Path = "/"
http.SetCookie(w, cookie)
}
w.WriteHeader(http.StatusNoContent)
}
func (u *UserHandler) whoAmI(w http.ResponseWriter, r *http.Request) {
var login = ""
for _, c := range r.Cookies() {
login, _ = goboardcookie.LoginForCookie(u.Db, c)
if len(login) > 0 {
break
}
}
if len(login) > 0 {
var err error
var user goboarduser.User
if user, err = goboarduser.GetUser(u.Db, login); err == nil {
var data []byte
if data, err = json.Marshal(user); err == nil {
w.WriteHeader(http.StatusOK)
w.Write(data)
return
}
}
w.WriteHeader(http.StatusInternalServerError)
u.logger.Println(err.Error())
return
}
w.WriteHeader(http.StatusForbidden)
w.Write([]byte("You need to be authenticated"))
return
}