internal/utils/token/token.go

@@ -0,0 +1,60 @@
+package token
+
+import (
+	"time"
+
+	"github.com/golang-jwt/jwt/v5"
+)
+
+// Claims 定义了 JWT 的声明结构
+type Claims struct {
+	UserID uint `json:"user_id"`
+	jwt.RegisteredClaims
+}
+
+// TokenService 定义了 token 操作的接口
+type TokenService interface {
+	GenerateToken(userID uint) (string, error)
+	ParseToken(tokenString string) (*Claims, error)
+}
+
+// tokenService 是 TokenService 接口的实现
+type tokenService struct {
+	secret []byte
+}
+
+// NewTokenService 创建并返回一个新的 TokenService 实例
+func NewTokenService(secret []byte) TokenService {
+	return &tokenService{secret: secret}
+}
+
+// GenerateToken 生成一个新的 JWT token
+func (s *tokenService) GenerateToken(userID uint) (string, error) {
+	nowTime := time.Now()
+	expireTime := nowTime.Add(24 * time.Hour) // Token 有效期为 24 小时
+
+	claims := Claims{
+		UserID: userID,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(expireTime),
+			Issuer:    "pig-farm-controller",
+		},
+	}
+
+	tokenClaims := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	token, err := tokenClaims.SignedString(s.secret)
+	return token, err
+}
+
+// ParseToken 解析并验证 JWT token
+func (s *tokenService) ParseToken(tokenString string) (*Claims, error) {
+	token, err := jwt.ParseWithClaims(tokenString, &Claims{}, func(token *jwt.Token) (interface{}, error) {
+		return s.secret, nil
+	})
+
+	if claims, ok := token.Claims.(*Claims); ok && token.Valid {
+		return claims, nil
+	}
+
+	return nil, err
+}

internal/utils/token/token_test.go

@@ -0,0 +1,94 @@
+package token
+
+import (
+	"testing"
+	"time"
+
+	"github.com/golang-jwt/jwt/v5"
+)
+
+func TestGenerateToken(t *testing.T) {
+	// 使用一个测试密钥初始化 TokenService
+	testSecret := []byte("test_secret_key")
+	service := NewTokenService(testSecret)
+
+	userID := uint(123)
+	tokenString, err := service.GenerateToken(userID)
+
+	if err != nil {
+		t.Fatalf("GenerateToken failed: %v", err)
+	}
+
+	if tokenString == "" {
+		t.Fatal("Generated token string is empty")
+	}
+
+	// 解析 token 以确保其有效性及声明
+	claims, err := service.ParseToken(tokenString)
+	if err != nil {
+		t.Fatalf("ParseToken failed after generation: %v", err)
+	}
+
+	if claims.UserID != userID {
+		t.Errorf("Expected UserID %d, got %d", userID, claims.UserID)
+	}
+
+	// 检查 token 是否未过期 (在合理范围内)
+	if claims.ExpiresAt == nil || claims.ExpiresAt.Time.Before(time.Now().Add(-time.Minute)) {
+		t.Errorf("Token expiration time is invalid or already expired")
+	}
+
+	if claims.Issuer != "pig-farm-controller" {
+		t.Errorf("Expected Issuer \"pig-farm-controller\", got \"%s\"", claims.Issuer)
+	}
+}
+
+func TestParseToken(t *testing.T) {
+	// 使用一个测试密钥初始化 TokenService
+	testSecret := []byte("test_secret_key")
+	service := NewTokenService(testSecret)
+
+	userID := uint(456)
+
+	// 生成一个有效的 token 用于解析测试
+	validToken, err := service.GenerateToken(userID)
+	if err != nil {
+		t.Fatalf("Failed to generate valid token for parsing test: %v", err)
+	}
+
+	// 测试用例 1: 有效 token
+	claims, err := service.ParseToken(validToken)
+	if err != nil {
+		t.Errorf("ParseToken failed for valid token: %v", err)
+	}
+
+	if claims.UserID != userID {
+		t.Errorf("Expected UserID %d, got %d for valid token", userID, claims.UserID)
+	}
+
+	// 测试用例 2: 无效 token (例如, 错误的签名)
+	invalidToken := "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VyX2lkIjoxMjMsImV4cCI6MTY3ODkwNTYwMCwiaXNzIjoicGlnLWZhcm0tY29udHJvbGxlciJ9.invalid_signature_here"
+	_, err = service.ParseToken(invalidToken)
+	if err == nil {
+		t.Error("ParseToken unexpectedly succeeded for invalid token")
+	}
+
+	// 测试用例 3: 过期 token (创建一个过期时间在过去的 token)
+	expiredClaims := Claims{
+		UserID: userID,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(time.Now().Add(-time.Hour)), // 1 小时前
+			Issuer:    "pig-farm-controller",
+		},
+	}
+	expiredTokenClaims := jwt.NewWithClaims(jwt.SigningMethodHS256, expiredClaims)
+	expiredTokenString, err := expiredTokenClaims.SignedString(testSecret)
+	if err != nil {
+		t.Fatalf("Failed to generate expired token: %v", err)
+	}
+
+	_, err = service.ParseToken(expiredTokenString)
+	if err == nil {
+		t.Error("ParseToken unexpectedly succeeded for expired token")
+	}
+}