80 lines
2.2 KiB
Go
80 lines
2.2 KiB
Go
package api
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import (
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"context"
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"net/http"
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"os"
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"strings"
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"github.com/golang-jwt/jwt/v5"
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)
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type contextKey string
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const ClaimsContextKey = contextKey("claims")
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// AuthMiddleware проверяет JWT токен и добавляет claims в контекст запроса.
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func AuthMiddleware(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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authHeader := r.Header.Get("Authorization")
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if authHeader == "" {
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http.Error(w, "Authorization header required", http.StatusUnauthorized)
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return
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}
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tokenString := strings.TrimPrefix(authHeader, "Bearer ")
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if tokenString == authHeader {
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http.Error(w, "Invalid token format", http.StatusUnauthorized)
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return
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}
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jwtSecret := []byte(os.Getenv("JWT_SECRET_KEY"))
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if len(jwtSecret) == 0 {
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http.Error(w, "JWT secret not configured", http.StatusInternalServerError)
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return
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}
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token, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
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if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, jwt.ErrSignatureInvalid
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}
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return jwtSecret, nil
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})
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if err != nil || !token.Valid {
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http.Error(w, "Invalid or expired token", http.StatusUnauthorized)
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return
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}
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claims, ok := token.Claims.(jwt.MapClaims)
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if !ok {
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http.Error(w, "Invalid token claims", http.StatusUnauthorized)
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return
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}
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// Добавляем claims в контекст
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ctx := context.WithValue(r.Context(), ClaimsContextKey, claims)
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next.ServeHTTP(w, r.WithContext(ctx))
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})
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}
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// AdminMiddleware проверяет, что пользователь аутентифицирован и имеет роль 'admin'.
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func AdminMiddleware(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// Получаем claims из контекста
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claims, ok := r.Context().Value(ClaimsContextKey).(jwt.MapClaims)
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if !ok {
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http.Error(w, "Could not get claims from context", http.StatusInternalServerError)
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return
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}
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role, ok := claims["role"].(string)
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if !ok || role != "admin" {
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http.Error(w, "Forbidden: insufficient permissions", http.StatusForbidden)
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return
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}
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next.ServeHTTP(w, r)
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})
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}
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