51 lines
1.4 KiB
Go
51 lines
1.4 KiB
Go
package middleware
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import (
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"fmt"
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"net/http"
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"os"
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"strings"
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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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func AuthMiddleware() gin.HandlerFunc {
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return func(c *gin.Context) {
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// 1. Ambil Header "Authorization"
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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": "Butuh Token untuk akses ini!"})
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c.Abort()
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return
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}
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// 2. Format token biasanya "Bearer <token_panjang>"
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// Kita pisahkan kata "Bearer" dan ambil tokennya saja
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tokenString := strings.Split(authHeader, " ")
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if len(tokenString) != 2 {
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c.JSON(http.StatusUnauthorized, gin.H{"error": "Format Token salah!"})
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c.Abort()
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return
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}
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// 3. Validasi Token dengan Secret Key kita
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token, err := jwt.Parse(tokenString[1], func(token *jwt.Token) (interface{}, error) {
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if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, fmt.Errorf("metode sign tidak valid")
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}
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return []byte(os.Getenv("JWT_SECRET")), nil
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})
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// 4. Jika token valid, ambil data user di dalamnya
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if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
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// Simpan user_id ke dalam konteks agar bisa dipakai di controller nanti
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c.Set("user_id", claims["user_id"])
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c.Set("role", claims["role"])
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c.Next() // Lanjut ke proses berikutnya
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} else {
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c.JSON(http.StatusUnauthorized, gin.H{"error": "Token tidak valid: " + err.Error()})
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c.Abort()
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}
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}
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} |