81 lines
2.0 KiB
Go
81 lines
2.0 KiB
Go
/*
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* Copyright 2024 Jonas Kaninda
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package middleware
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import (
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"encoding/json"
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"fmt"
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"github.com/jkaninda/goma-gateway/pkg/errorinterceptor"
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"net/http"
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"slices"
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)
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func getRealIP(r *http.Request) string {
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if ip := r.Header.Get("X-Real-IP"); ip != "" {
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return ip
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}
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if ip := r.Header.Get("X-Forwarded-For"); ip != "" {
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return ip
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}
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return r.RemoteAddr
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}
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func allowedOrigin(origins []string, origin string) bool {
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return slices.Contains(origins, origin)
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}
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func canInterceptError(code int, errors []errorinterceptor.Error) bool {
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for _, er := range errors {
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if er.Code == code {
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return true
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}
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continue
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}
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return false
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}
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func errMessage(code int, errors []errorinterceptor.Error) (string, error) {
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for _, er := range errors {
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if er.Code == code {
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if len(er.Message) != 0 {
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return er.Message, nil
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}
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continue
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}
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}
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return "", fmt.Errorf("%d errors occurred", code)
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}
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// RespondWithError is a helper function to handle error responses with flexible content type
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func RespondWithError(w http.ResponseWriter, statusCode int, logMessage string, errorIntercept errorinterceptor.ErrorInterceptor) {
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message, err := errMessage(statusCode, errorIntercept.Errors)
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if err != nil {
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message = logMessage
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}
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(statusCode)
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err = json.NewEncoder(w).Encode(ProxyResponseError{
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Success: false,
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Code: statusCode,
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Message: message,
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})
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if err != nil {
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return
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}
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return
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}
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