68 lines
1.5 KiB
Go
68 lines
1.5 KiB
Go
// Copyright 2024 Patial Tech. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package handler
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import (
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"context"
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"net"
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"net/http"
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"strings"
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"gitserver.in/patialtech/rano/util/uid"
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)
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const RequestIDKey = "RequestID"
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const RequestIPKey = "RequestIP"
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const RequestUserAgentKey = "RequestUA"
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var defaultHeaders = []string{
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"True-Client-IP", // Cloudflare Enterprise plan
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"X-Real-IP",
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"X-Forwarded-For",
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}
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// Request middleware that will do the following:
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// - pull session user
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// - set requestID
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// - set ctx RealIP and client userAgent info
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func Request() func(http.Handler) http.Handler {
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return func(h http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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ctx := r.Context()
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// ID
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requestID := r.Header.Get("X-Request-Id")
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if requestID == "" {
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requestID = uid.NewUUID()
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}
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ctx = context.WithValue(ctx, RequestIDKey, requestID)
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// IP
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if ip := getRealIP(r, defaultHeaders); ip != "" {
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r.RemoteAddr = ip
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}
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ctx = context.WithValue(ctx, RequestIPKey, requestID)
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// User Agent
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ctx = context.WithValue(ctx, RequestUserAgentKey, r.UserAgent())
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h.ServeHTTP(w, r)
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})
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}
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}
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func getRealIP(r *http.Request, headers []string) string {
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for _, header := range headers {
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if ip := r.Header.Get(header); ip != "" {
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ips := strings.Split(ip, ",")
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if ips[0] == "" || net.ParseIP(ips[0]) == nil {
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continue
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}
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return ips[0]
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}
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}
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return ""
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}
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