feat: jwt and check

go.mod

@@ -4,6 +4,8 @@ go 1.24.5
 
 require (
 	github.com/gin-gonic/gin v1.11.0
+	github.com/golang-jwt/jwt/v5 v5.3.0
+	golang.org/x/crypto v0.40.0
 	gopkg.in/yaml.v3 v3.0.1
 	gorm.io/driver/mysql v1.6.0
 	gorm.io/gorm v1.31.1
@@ -37,7 +39,6 @@ require (
 	github.com/ugorji/go/codec v1.3.0 // indirect
 	go.uber.org/mock v0.5.0 // indirect
 	golang.org/x/arch v0.20.0 // indirect
-	golang.org/x/crypto v0.40.0 // indirect
 	golang.org/x/mod v0.25.0 // indirect
 	golang.org/x/net v0.42.0 // indirect
 	golang.org/x/sync v0.16.0 // indirect

go.sum

@@ -29,6 +29,8 @@ github.com/goccy/go-json v0.10.2 h1:CrxCmQqYDkv1z7lO7Wbh2HN93uovUHgrECaO5ZrCXAU=
 github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
 github.com/goccy/go-yaml v1.18.0 h1:8W7wMFS12Pcas7KU+VVkaiCng+kG8QiFeFwzFb+rwuw=
 github.com/goccy/go-yaml v1.18.0/go.mod h1:XBurs7gK8ATbW4ZPGKgcbrY1Br56PdM69F7LkFRi1kA=
+github.com/golang-jwt/jwt/v5 v5.3.0 h1:pv4AsKCKKZuqlgs5sUmn4x8UlGa0kEVt/puTpKx9vvo=
+github.com/golang-jwt/jwt/v5 v5.3.0/go.mod h1:fxCRLWMO43lRc8nhHWY6LGqRcf+1gQWArsqaEUEa5bE=
 github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
 github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=

internal/auth/jwt.go

@@ -0,0 +1,54 @@
+// internal/auth/jwt.go
+package auth
+
+import (
+	"time"
+
+	"github.com/golang-jwt/jwt/v5"
+)
+
+var secret = []byte("change-me-in-env")
+
+type Claims struct {
+	UserID   int64  `json:"user_id"`
+	Username string `json:"username"`
+	jwt.RegisteredClaims
+}
+
+func GenerateToken(userID int64, username string) (string, error) {
+	now := time.Now()
+
+	claims := Claims{
+		UserID:   userID,
+		Username: username,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(now.Add(24 * time.Hour)),
+			IssuedAt:  jwt.NewNumericDate(now),
+			NotBefore: jwt.NewNumericDate(now),
+		},
+	}
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+
+	return token.SignedString(secret)
+}
+
+func ParseToken(tokenString string) (*Claims, error) {
+	token, err := jwt.ParseWithClaims(
+		tokenString,
+		&Claims{},
+		func(token *jwt.Token) (interface{}, error) {
+			return secret, nil
+		},
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	claims, ok := token.Claims.(*Claims)
+	if !ok || !token.Valid {
+		return nil, jwt.ErrTokenInvalidClaims
+	}
+
+	return claims, nil
+}

internal/middleware/jwt.go

@@ -0,0 +1,41 @@
+// internal/middleware/jwt.go
+package middleware
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+
+	"feedsystem_video_go/internal/auth"
+)
+
+// JWTAuth check jwt token
+func JWTAuth() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		authHeader := c.GetHeader("Authorization")
+		if authHeader == "" {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "missing authorization header"})
+			return
+		}
+
+		parts := strings.SplitN(authHeader, " ", 2)
+		if len(parts) != 2 || !strings.EqualFold(parts[0], "Bearer") {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "invalid authorization header"})
+			return
+		}
+
+		tokenString := parts[1]
+
+		claims, err := auth.ParseToken(tokenString)
+		if err != nil {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "invalid or expired token"})
+			return
+		}
+
+		c.Set("userID", claims.UserID)
+		c.Set("username", claims.Username)
+
+		c.Next()
+	}
+}