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authentik/outpost/pkg/proxy/utils.go

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package proxy
import (
"net"
"net/http"
)
var xForwardedHost = http.CanonicalHeaderKey("X-Forwarded-Host")
func getHost(req *http.Request) string {
host := req.Host
if req.Header.Get(xForwardedHost) != "" {
host = req.Header.Get(xForwardedHost)
}
hostOnly, _, err := net.SplitHostPort(host)
if err != nil {
return host
}
return hostOnly
}