143 lines
3.5 KiB
Go
143 lines
3.5 KiB
Go
package handler
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import (
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"encoding/json"
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"net/http"
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"strings"
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"time"
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"5803025024/w04/internal/auth"
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"5803025024/w04/internal/models"
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"5803025024/w04/internal/store"
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"github.com/google/uuid"
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)
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type AuthHandler struct {
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userStore *store.UserStore
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sessionStore *store.SessionStore
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}
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func NewAuthHandler(userStore *store.UserStore, sessionStore *store.SessionStore) *AuthHandler {
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return &AuthHandler{
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userStore: userStore,
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sessionStore: sessionStore,
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}
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}
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type authRequest struct {
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Username string `json:"username"`
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Password string `json:"password"`
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}
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func (h *AuthHandler) Register(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodPost {
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http.Error(w, "Method Not Allowed", http.StatusMethodNotAllowed)
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return
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}
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var req authRequest
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if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
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http.Error(w, "Bad Request", http.StatusBadRequest)
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return
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}
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req.Username = strings.TrimSpace(req.Username)
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if len(req.Username) < 3 || len(req.Username) > 32 || req.Password == "" {
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http.Error(w, "Invalid username or password", http.StatusBadRequest)
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return
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}
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hash, err := auth.HashPassword(req.Password)
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if err != nil {
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http.Error(w, "Internal Server Error", http.StatusInternalServerError)
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return
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}
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user := &models.User{
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ID: uuid.New().String(),
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Username: req.Username,
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PasswordHash: hash,
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}
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if err := h.userStore.Create(r.Context(), user); err != nil {
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http.Error(w, "Username already exists or create failed", http.StatusBadRequest)
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return
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}
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusCreated)
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_ = json.NewEncoder(w).Encode(user)
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}
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func (h *AuthHandler) Login(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodPost {
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http.Error(w, "Method Not Allowed", http.StatusMethodNotAllowed)
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return
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}
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var req authRequest
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if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
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http.Error(w, "Bad Request", http.StatusBadRequest)
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return
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}
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user, err := h.userStore.GetByUsername(r.Context(), req.Username)
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if err != nil || !auth.CheckPassword(req.Password, user.PasswordHash) {
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http.Error(w, "Invalid credentials", http.StatusUnauthorized)
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return
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}
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token, err := auth.GenerateToken()
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if err != nil {
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http.Error(w, "Internal Server Error", http.StatusInternalServerError)
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return
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}
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session := &models.Session{
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Token: token,
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UserID: user.ID,
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CreatedAt: time.Now(),
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}
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if err := h.sessionStore.Create(r.Context(), session); err != nil {
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http.Error(w, "Internal Server Error", http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusOK)
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_ = json.NewEncoder(w).Encode(session)
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}
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func (h *AuthHandler) Logout(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodPost {
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http.Error(w, "Method Not Allowed", http.StatusMethodNotAllowed)
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return
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}
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authHeader := r.Header.Get("Authorization")
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if authHeader == "" {
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http.Error(w, "Unauthorized", http.StatusUnauthorized)
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return
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}
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token := authHeader
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if strings.HasPrefix(strings.ToLower(authHeader), "bearer ") {
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token = authHeader[7:]
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}
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token = strings.TrimSpace(token)
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if token == "" {
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http.Error(w, "Unauthorized", http.StatusUnauthorized)
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return
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}
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if err := h.sessionStore.Delete(r.Context(), token); err != nil {
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http.Error(w, "Internal Server Error", http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusOK)
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_ = json.NewEncoder(w).Encode(map[string]string{"message": "logged out"})
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}
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