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25 lines
532 B
Go
25 lines
532 B
Go
package httputil
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import (
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"net"
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"net/http"
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"strings"
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)
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// GetClientAddr returns the first value in X-Forwarded-For if it exists
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// otherwise fall back to use RemoteAddr
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func GetClientAddr(r *http.Request) string {
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addr := r.RemoteAddr
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if s := r.Header.Get("X-Forwarded-For"); s != "" {
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ips := strings.Split(s, ",")
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// assume the first one is the client address
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if len(ips) != 0 {
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// validate the ip
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if realIP := net.ParseIP(ips[0]); realIP != nil {
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addr = strings.TrimSpace(ips[0])
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}
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}
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}
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return addr
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}
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