初始化项目框架，完成部分接口开发

utility/jwt/jwt.go

@@ -0,0 +1,78 @@
+package jwt
+
+import (
+	"errors"
+	"server/utility/ecode"
+	"strings"
+	"time"
+
+	"github.com/golang-jwt/jwt/v5"
+	"github.com/google/uuid"
+)
+
+var (
+	secretKey = []byte("1a40c1d5b7a1b0f0fasdfaf835e0b24ca292a6")
+	issuer    = "novel"
+)
+
+type (
+	TokenIn struct {
+		UserId int64  // 用户 ID
+		Role   string // 权限标识
+	}
+	TokenOut struct {
+		UserId int64  // 用户 ID
+		Role   string // 权限标识
+		JTI    string // JWT 唯一标识
+	}
+
+	jwtClaims struct {
+		UserId int64  `json:"user_id"` // 用户 ID
+		Role   string `json:"Role"`    // 权限标识
+		JTI    string `json:"jti"`     // 唯一标识
+		jwt.RegisteredClaims
+	}
+)
+
+func GenerateToken(in *TokenIn) (string, error) {
+	claims := jwtClaims{
+		UserId: in.UserId,
+		Role:   in.Role,
+		JTI:    uuid.NewString(),
+		RegisteredClaims: jwt.RegisteredClaims{
+			IssuedAt:  jwt.NewNumericDate(time.Now()),
+			NotBefore: jwt.NewNumericDate(time.Now()),
+			Issuer:    issuer,
+		},
+	}
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	return token.SignedString(secretKey)
+}
+
+func ParseToken(tokenString string) (*TokenOut, error) {
+	if strings.HasPrefix(tokenString, "Bearer ") {
+		tokenString = strings.TrimPrefix(tokenString, "Bearer ")
+	}
+
+	token, err := jwt.ParseWithClaims(tokenString, &jwtClaims{}, func(token *jwt.Token) (interface{}, error) {
+		return secretKey, nil
+	})
+	if err != nil {
+		if errors.Is(err, jwt.ErrTokenExpired) {
+			return nil, ecode.Expire.Sub("token_expired")
+		}
+		return nil, ecode.Fail.Sub("token_parse_failed")
+	}
+
+	claims, ok := token.Claims.(*jwtClaims)
+	if !ok || !token.Valid {
+		return nil, ecode.InvalidOperation.Sub("invalid_token")
+	}
+
+	return &TokenOut{
+		UserId: claims.UserId,
+		Role:   claims.Role,
+		JTI:    claims.JTI,
+	}, nil
+}