feat: Add other tasks from chapter 6

chirp.go

@@ -9,6 +9,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/finchrelia/chirpy-server/internal/auth"
 	"github.com/finchrelia/chirpy-server/internal/database"
 	"github.com/google/uuid"
 )
@@ -23,16 +24,23 @@ type Chirp struct {
 
 func (cfg *apiConfig) chirpsCreate(w http.ResponseWriter, r *http.Request) {
 	type parameters struct {
-		Content string    `json:"body"`
-		UserID  uuid.UUID `json:"user_id"`
+		Content string `json:"body"`
 	}
-	type returnVals struct {
-		Data string `json:"cleaned_body"`
+	token, err := auth.GetBearerToken(r.Header)
+	if err != nil {
+		log.Printf("Error extracting token: %s", err)
+		w.WriteHeader(401)
+		return
+	}
+	userId, err := auth.ValidateJWT(token, cfg.JWT)
+	if err != nil {
+		log.Printf("Invalid JWT: %s", err)
+		w.WriteHeader(401)
+		return
 	}
-
 	decoder := json.NewDecoder(r.Body)
 	params := parameters{}
-	err := decoder.Decode(&params)
+	err = decoder.Decode(&params)
 	if err != nil {
 		log.Printf("Error decoding parameters: %s", err)
 		w.WriteHeader(500)
@@ -56,12 +64,9 @@ func (cfg *apiConfig) chirpsCreate(w http.ResponseWriter, r *http.Request) {
 		w.Write(dat)
 	} else {
 		cleanedData := cleanText(params.Content)
-		// respBody := returnVals{
-		// 	Data: cleanedData,
-		// }
 		chirp, err := cfg.DB.CreateChirp(r.Context(), database.CreateChirpParams{
 			Body:   cleanedData,
-			UserID: params.UserID,
+			UserID: userId,
 		})
 		if err != nil {
 			log.Printf("Error creating chirp: %s", err)

go.mod

@@ -3,6 +3,7 @@ module github.com/finchrelia/chirpy-server
 go 1.22.5
 
 require (
+	github.com/golang-jwt/jwt/v5 v5.2.1 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/joho/godotenv v1.5.1 // indirect
 	github.com/lib/pq v1.10.9 // indirect

go.sum

@@ -1,3 +1,5 @@
+github.com/golang-jwt/jwt/v5 v5.2.1 h1:OuVbFODueb089Lh128TAcimifWaLhJwVflnrgM17wHk=
+github.com/golang-jwt/jwt/v5 v5.2.1/go.mod h1:pqrtFR0X4osieyHYxtmOUWsAWrfe1Q5UVIyoH402zdk=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=

internal/auth/auth.go

@@ -1,6 +1,17 @@
 package auth
 
-import "golang.org/x/crypto/bcrypt"
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"errors"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/golang-jwt/jwt/v5"
+	"github.com/google/uuid"
+	"golang.org/x/crypto/bcrypt"
+)
 
 func HashPassword(password string) (string, error) {
 	hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), 10)
@@ -10,3 +21,63 @@ func HashPassword(password string) (string, error) {
 func CheckPasswordHash(password, hash string) error {
 	return bcrypt.CompareHashAndPassword([]byte(hash), []byte(password))
 }
+
+func MakeJWT(userID uuid.UUID, tokenSecret string) (string, error) {
+	newToken := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.RegisteredClaims{
+		Issuer:    "chirpy",
+		IssuedAt:  jwt.NewNumericDate(time.Now()),
+		ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Hour)),
+		Subject:   userID.String(),
+	})
+	token, err := newToken.SignedString([]byte(tokenSecret))
+	if err != nil {
+		return "", err
+	}
+	return token, nil
+}
+
+func ValidateJWT(tokenString, tokenSecret string) (uuid.UUID, error) {
+
+	token, err := jwt.ParseWithClaims(tokenString, &jwt.RegisteredClaims{}, func(t *jwt.Token) (interface{}, error) {
+		return []byte(tokenSecret), nil
+	})
+	if err != nil {
+		return uuid.UUID{}, err
+	}
+	if !token.Valid {
+		return uuid.UUID{}, errors.New("token has expired")
+	}
+
+	userIDString, err := token.Claims.GetSubject()
+	if err != nil {
+		return uuid.UUID{}, err
+	}
+	userID, err := uuid.Parse(userIDString)
+	if err != nil {
+		return uuid.UUID{}, err
+	}
+
+	return userID, nil
+}
+
+func GetBearerToken(headers http.Header) (string, error) {
+	authHeader := headers.Get("Authorization")
+	if authHeader == "" {
+		return "", errors.New("authorization header is not set")
+	}
+	if !strings.HasPrefix(authHeader, "Bearer ") {
+		return "", errors.New("incorrect authorization type, must be of type Bearer")
+	}
+	bearerToken := strings.TrimPrefix(authHeader, "Bearer ")
+	return strings.TrimSpace(bearerToken), nil
+}
+
+func MakeRefreshToken() (string, error) {
+	buffer := make([]byte, 32)
+	_, err := rand.Read(buffer)
+	if err != nil {
+		return "", err
+	}
+	hexData := hex.EncodeToString(buffer)
+	return hexData, nil
+}

internal/database/models.go

@@ -5,6 +5,7 @@
 package database
 
 import (
+	"database/sql"
 	"time"
 
 	"github.com/google/uuid"
@@ -18,6 +19,15 @@ type Chirp struct {
 	UserID    uuid.UUID
 }
 
+type RefreshToken struct {
+	Token     string
+	CreatedAt time.Time
+	UpdatedAt time.Time
+	UserID    uuid.UUID
+	ExpiresAt sql.NullTime
+	RevokedAt sql.NullTime
+}
+
 type User struct {
 	ID             uuid.UUID
 	CreatedAt      time.Time

internal/database/refresh_token.sql.go

@@ -0,0 +1,46 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.27.0
+// source: refresh_token.sql
+
+package database
+
+import (
+	"context"
+	"database/sql"
+
+	"github.com/google/uuid"
+)
+
+const createRefreshToken = `-- name: CreateRefreshToken :one
+INSERT INTO refresh_tokens (token, created_at, updated_at, user_id, expires_at, revoked_at)
+VALUES (
+    $1,
+    NOW(),
+    NOW(),
+    $2,
+    $3,
+    NULL
+)
+RETURNING token, created_at, updated_at, user_id, expires_at, revoked_at
+`
+
+type CreateRefreshTokenParams struct {
+	Token     string
+	UserID    uuid.UUID
+	ExpiresAt sql.NullTime
+}
+
+func (q *Queries) CreateRefreshToken(ctx context.Context, arg CreateRefreshTokenParams) (RefreshToken, error) {
+	row := q.db.QueryRowContext(ctx, createRefreshToken, arg.Token, arg.UserID, arg.ExpiresAt)
+	var i RefreshToken
+	err := row.Scan(
+		&i.Token,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+		&i.UserID,
+		&i.ExpiresAt,
+		&i.RevokedAt,
+	)
+	return i, err
+}

internal/database/update_token.sql.go

@@ -0,0 +1,23 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.27.0
+// source: update_token.sql
+
+package database
+
+import (
+	"context"
+)
+
+const revokeRefreshToken = `-- name: RevokeRefreshToken :exec
+UPDATE refresh_tokens
+SET 
+    revoked_at = NOW(),
+    updated_at = NOW()
+WHERE token = $1
+`
+
+func (q *Queries) RevokeRefreshToken(ctx context.Context, token string) error {
+	_, err := q.db.ExecContext(ctx, revokeRefreshToken, token)
+	return err
+}

internal/database/user_from_token.sql.go

@@ -0,0 +1,26 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.27.0
+// source: user_from_token.sql
+
+package database
+
+import (
+	"context"
+
+	"github.com/google/uuid"
+)
+
+const getUserFromRefreshToken = `-- name: GetUserFromRefreshToken :one
+SELECT user_id FROM refresh_tokens
+WHERE refresh_tokens.token = $1
+AND refresh_tokens.expires_at > NOW()
+AND refresh_tokens.revoked_at IS NULL
+`
+
+func (q *Queries) GetUserFromRefreshToken(ctx context.Context, token string) (uuid.UUID, error) {
+	row := q.db.QueryRowContext(ctx, getUserFromRefreshToken, token)
+	var user_id uuid.UUID
+	err := row.Scan(&user_id)
+	return user_id, err
+}

internal/database/users.sql.go

@@ -16,13 +16,18 @@ VALUES (
     NOW(),
     NOW(),
     $1,
-	$2
+    $2
 )
 RETURNING id, created_at, updated_at, email, hashed_password
 `
 
-func (q *Queries) CreateUser(ctx context.Context, email string, hashed_password string) (User, error) {
-	row := q.db.QueryRowContext(ctx, createUser, email, hashed_password)
+type CreateUserParams struct {
+	Email          string
+	HashedPassword string
+}
+
+func (q *Queries) CreateUser(ctx context.Context, arg CreateUserParams) (User, error) {
+	row := q.db.QueryRowContext(ctx, createUser, arg.Email, arg.HashedPassword)
 	var i User
 	err := row.Scan(
 		&i.ID,

login.go

@@ -1,11 +1,15 @@
 package main
 
 import (
+	"database/sql"
 	"encoding/json"
 	"log"
 	"net/http"
+	"time"
 
 	"github.com/finchrelia/chirpy-server/internal/auth"
+	"github.com/finchrelia/chirpy-server/internal/database"
+	"github.com/google/uuid"
 )
 
 func (cfg *apiConfig) Login(w http.ResponseWriter, r *http.Request) {
@@ -22,9 +26,10 @@ func (cfg *apiConfig) Login(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(401)
 		return
 	}
+
 	loggedUser, err := cfg.DB.GetUserByEmail(r.Context(), p.Email)
 	if err != nil {
-		log.Printf("Error retrieving user: %s", err)
+		log.Printf("Error retrieving user: %v", err)
 	}
 
 	err = auth.CheckPasswordHash(p.Password, loggedUser.HashedPassword)
@@ -34,11 +39,46 @@ func (cfg *apiConfig) Login(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	data, err := json.Marshal(User{
-		ID:        loggedUser.ID,
-		CreatedAt: loggedUser.CreatedAt,
-		UpdatedAt: loggedUser.UpdatedAt,
-		Email:     loggedUser.Email,
+	newJwt, err := auth.MakeJWT(loggedUser.ID, cfg.JWT)
+	if err != nil {
+		log.Printf("Error creating JWT: %s", newJwt)
+		w.WriteHeader(500)
+		return
+	}
+	newRefreshToken, err := auth.MakeRefreshToken()
+	if err != nil {
+		log.Printf("Error creating refresh token: %v", err)
+		w.WriteHeader(500)
+		return
+	}
+
+	refreshTokenParams := database.CreateRefreshTokenParams{
+		Token:     newRefreshToken,
+		UserID:    loggedUser.ID,
+		ExpiresAt: sql.NullTime{Time: time.Now().AddDate(0, 0, 60), Valid: true},
+	}
+	_, err = cfg.DB.CreateRefreshToken(r.Context(), refreshTokenParams)
+	if err != nil {
+		log.Printf("Error adding refresh token to db: %s", err)
+		w.WriteHeader(500)
+		return
+	}
+	type loginResponse struct {
+		ID           uuid.UUID `json:"id"`
+		CreatedAt    time.Time `json:"created_at"`
+		UpdatedAt    time.Time `json:"updated_at"`
+		Email        string    `json:"email"`
+		AccessToken  string    `json:"token"`
+		RefreshToken string    `json:"refresh_token"`
+	}
+
+	data, err := json.Marshal(loginResponse{
+		ID:           loggedUser.ID,
+		CreatedAt:    loggedUser.CreatedAt,
+		UpdatedAt:    loggedUser.UpdatedAt,
+		Email:        loggedUser.Email,
+		AccessToken:  newJwt,
+		RefreshToken: newRefreshToken,
 	})
 	if err != nil {
 		log.Printf("Error marshalling JSON: %s", err)

main.go

@@ -16,6 +16,7 @@ type apiConfig struct {
 	fileserverHits atomic.Int32
 	DB             *database.Queries
 	Platform       string
+	JWT            string
 }
 
 func main() {
@@ -28,6 +29,10 @@ func main() {
 	if platform == "" {
 		log.Fatalf("Empty PLATFORM env var!")
 	}
+	jwtSecret := os.Getenv("JWT_SECRET")
+	if jwtSecret == "" {
+		log.Fatalf("Empty JWT_SECRET env var!")
+	}
 	db, err := sql.Open("postgres", dbURL)
 	if err != nil {
 		log.Fatalf("Unable to connect to db: %s", err)
@@ -36,6 +41,7 @@ func main() {
 		fileserverHits: atomic.Int32{},
 		DB:             database.New(db),
 		Platform:       platform,
+		JWT:            jwtSecret,
 	}
 	mux := http.NewServeMux()
 	fsHandler := apiCfg.middlewareMetricsInc(http.StripPrefix("/app", http.FileServer(http.Dir("."))))
@@ -52,6 +58,8 @@ func main() {
 	mux.HandleFunc("POST /api/users", apiCfg.createUsers)
 	mux.HandleFunc("GET /api/chirps/{chirpID}", apiCfg.getChirp)
 	mux.HandleFunc("POST /api/login", apiCfg.Login)
+	mux.HandleFunc("POST /api/refresh", apiCfg.RefreshToken)
+	mux.HandleFunc("POST /api/revoke", apiCfg.RevokeToken)
 
 	server := &http.Server{
 		Addr:    ":8080",

sql/queries/refresh_token.sql

@@ -0,0 +1,11 @@
+-- name: CreateRefreshToken :one
+INSERT INTO refresh_tokens (token, created_at, updated_at, user_id, expires_at, revoked_at)
+VALUES (
+    $1,
+    NOW(),
+    NOW(),
+    $2,
+    $3,
+    NULL
+)
+RETURNING *;

sql/queries/update_token.sql

@@ -0,0 +1,6 @@
+-- name: RevokeRefreshToken :exec
+UPDATE refresh_tokens
+SET 
+    revoked_at = NOW(),
+    updated_at = NOW()
+WHERE token = $1;

sql/queries/user_from_token.sql

@@ -0,0 +1,5 @@
+-- name: GetUserFromRefreshToken :one
+SELECT user_id FROM refresh_tokens
+WHERE refresh_tokens.token = $1
+AND refresh_tokens.expires_at > NOW()
+AND refresh_tokens.revoked_at IS NULL;

sql/queries/users.sql

@@ -1,10 +1,11 @@
 -- name: CreateUser :one
-INSERT INTO users (id, created_at, updated_at, email)
+INSERT INTO users (id, created_at, updated_at, email, hashed_password)
 VALUES (
     gen_random_uuid(),
     NOW(),
     NOW(),
-    $1
+    $1,
+    $2
 )
 RETURNING *;
 

sql/schema/004_refresh_token.sql

@@ -0,0 +1,12 @@
+-- +goose Up
+CREATE TABLE refresh_tokens (
+    token TEXT PRIMARY KEY,
+    created_at TIMESTAMP NOT NULL,
+    updated_at TIMESTAMP NOT NULL,
+    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    expires_at TIMESTAMP,
+    revoked_at TIMESTAMP
+);
+
+-- +goose Down
+DROP TABLE refresh_tokens;

token.go

@@ -0,0 +1,62 @@
+package main
+
+import (
+	"encoding/json"
+	"log"
+	"net/http"
+
+	"github.com/finchrelia/chirpy-server/internal/auth"
+)
+
+func (cfg *apiConfig) RefreshToken(w http.ResponseWriter, r *http.Request) {
+	token, err := auth.GetBearerToken(r.Header)
+	if err != nil {
+		log.Printf("Error extracting token: %s", err)
+		w.WriteHeader(401)
+		return
+	}
+
+	dbUser, err := cfg.DB.GetUserFromRefreshToken(r.Context(), token)
+	if err != nil {
+		log.Printf("Error getting user: %v", err)
+		w.WriteHeader(401)
+		return
+	}
+	newToken, err := auth.MakeJWT(dbUser, cfg.JWT)
+	if err != nil {
+		log.Printf("Error creating new JWT: %v", err)
+		w.WriteHeader(500)
+		return
+	}
+	type tokenResponse struct {
+		AccessToken string `json:"token"`
+	}
+
+	data, err := json.Marshal(tokenResponse{
+		AccessToken: newToken,
+	})
+	if err != nil {
+		log.Printf("Error marshalling JSON: %s", err)
+		w.WriteHeader(500)
+		return
+	}
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(200)
+	w.Write(data)
+}
+
+func (cfg *apiConfig) RevokeToken(w http.ResponseWriter, r *http.Request) {
+	token, err := auth.GetBearerToken(r.Header)
+	if err != nil {
+		log.Printf("Error extracting token: %s", err)
+		w.WriteHeader(401)
+		return
+	}
+	err = cfg.DB.RevokeRefreshToken(r.Context(), token)
+	if err != nil {
+		log.Printf("Error revoking token in database: %v", err)
+		w.WriteHeader(500)
+		return
+	}
+	w.WriteHeader(204)
+}

users.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"github.com/finchrelia/chirpy-server/internal/auth"
+	"github.com/finchrelia/chirpy-server/internal/database"
 	"github.com/google/uuid"
 )
 
@@ -38,7 +39,10 @@ func (cfg *apiConfig) createUsers(w http.ResponseWriter, r *http.Request) {
 	if err != nil {
 		log.Printf("Error hashing password: %s", err)
 	}
-	newDBUser, err := cfg.DB.CreateUser(r.Context(), params.Email, hashedPassword)
+	newDBUser, err := cfg.DB.CreateUser(r.Context(), database.CreateUserParams{
+		Email:          params.Email,
+		HashedPassword: hashedPassword,
+	})
 	if err != nil {
 		log.Printf("Error creating user %s: %s", params.Email, err)
 		w.WriteHeader(500)