package httpapi

import "net/http"

const (

// XForwardedHostHeader is a header used by proxies to indicate the

// original host of the request.

XForwardedHostHeader = "X-Forwarded-Host"

)

// RequestHost returns the name of the host from the request. It prioritizes

// 'X-Forwarded-Host' over r.Host since most requests are being proxied.

func RequestHost(r *http.Request) string {

host := r.Header.Get(XForwardedHostHeader)

if host != "" {

return host

}

return r.Host

}

func IsWebsocketUpgrade(r *http.Request) bool {

vs := r.Header.Values("Upgrade")

for _, v := range vs {

if v == "websocket" {

return true

}

}

return false

}