refac: removed 7 direct and 12 indirect go modules for custom code instead

api/pkg/authtoken/middleware.go

@@ -0,0 +1,79 @@
+package authtoken
+
+import (
+	"RenewCMS/api/pkg/apperr"
+	"context"
+	"net/http"
+	"strings"
+)
+
+const (
+	cookieName   = "jwt"
+	bearerPrefix = "bearer "
+)
+
+type contextKey struct{}
+
+type verdict struct {
+	claims Claims
+	err    error
+}
+
+func Verifier(auth *Auth) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			claims, err := auth.Decode(tokenFromRequest(r))
+			next.ServeHTTP(w, r.WithContext(NewContext(r.Context(), claims, err)))
+		})
+	}
+}
+
+func Authenticator(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if _, err := FromContext(r.Context()); err != nil {
+			http.Error(w, apperr.UnauthorizedErrorMessage, http.StatusUnauthorized)
+			return
+		}
+		next.ServeHTTP(w, r)
+	})
+}
+
+func NewContext(ctx context.Context, claims Claims, err error) context.Context {
+	return context.WithValue(ctx, contextKey{}, verdict{claims: claims, err: err})
+}
+
+func FromContext(ctx context.Context) (Claims, error) {
+	stored, ok := ctx.Value(contextKey{}).(verdict)
+	switch {
+	case !ok:
+		return nil, ErrNoToken
+	case stored.err != nil:
+		return nil, stored.err
+	case stored.claims == nil:
+		return nil, ErrNoToken
+	}
+	return stored.claims, nil
+}
+
+func tokenFromRequest(r *http.Request) string {
+	if token := tokenFromHeader(r); token != "" {
+		return token
+	}
+	return tokenFromCookie(r)
+}
+
+func tokenFromHeader(r *http.Request) string {
+	header := r.Header.Get("Authorization")
+	if len(header) <= len(bearerPrefix) || !strings.EqualFold(header[:len(bearerPrefix)], bearerPrefix) {
+		return ""
+	}
+	return header[len(bearerPrefix):]
+}
+
+func tokenFromCookie(r *http.Request) string {
+	cookie, err := r.Cookie(cookieName)
+	if err != nil {
+		return ""
+	}
+	return cookie.Value
+}