72 lines
1.6 KiB
Go
72 lines
1.6 KiB
Go
package middleware
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import (
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"net/http"
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"strings"
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"time"
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"github.com/gin-gonic/gin"
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"github.com/golang-jwt/jwt/v5"
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)
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type Claims struct {
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UserID string `json:"user_id"`
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jwt.RegisteredClaims
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}
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var jwtSecret = []byte("gitm-default-secret")
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func SetJWTSecret(secret string) {
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jwtSecret = []byte(secret)
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}
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func GenerateToken(userID string) (string, error) {
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claims := Claims{
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UserID: userID,
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(time.Now().Add(24 * time.Hour)),
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IssuedAt: jwt.NewNumericDate(time.Now()),
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},
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}
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
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return token.SignedString(jwtSecret)
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}
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func ValidateToken(tokenString string) (*Claims, error) {
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token, err := jwt.ParseWithClaims(tokenString, &Claims{}, func(token *jwt.Token) (interface{}, error) {
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return jwtSecret, nil
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})
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if err != nil {
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return nil, err
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}
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if claims, ok := token.Claims.(*Claims); ok && token.Valid {
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return claims, nil
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}
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return nil, jwt.ErrSignatureInvalid
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}
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func AuthMiddleware() gin.HandlerFunc {
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return func(c *gin.Context) {
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authHeader := c.GetHeader("Authorization")
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if authHeader == "" {
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c.JSON(http.StatusUnauthorized, gin.H{"error": "Authorization header required"})
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c.Abort()
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return
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}
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parts := strings.SplitN(authHeader, " ", 2)
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if len(parts) != 2 || parts[0] != "Bearer" {
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c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid authorization format"})
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c.Abort()
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return
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}
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claims, err := ValidateToken(parts[1])
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if err != nil {
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c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid token"})
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c.Abort()
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return
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}
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c.Set("user_id", claims.UserID)
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c.Next()
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}
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}
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