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Allow mixed case Upgrade headers

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Caddy expects websocket to be completely lowercase.
Some applications send websocket upgrade headers like the following:
`Upgrade: WebSocket`

This change allows all variations of websocket.
This commit is contained in:
Ruben Callewaert 2016-04-03 17:48:53 +02:00
parent 462128cd80
commit 1a9f700287
1 changed files with 1 additions and 1 deletions
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2
middleware/proxy/reverseproxy.go
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@ -207,7 +207,7 @@ func (p *ReverseProxy) ServeHTTP(rw http.ResponseWriter, req *http.Request, extr
return err
}
if res.StatusCode == http.StatusSwitchingProtocols && res.Header.Get("Upgrade") == "websocket" {
if res.StatusCode == http.StatusSwitchingProtocols && strings.ToLower(res.Header.Get("Upgrade")) == "websocket" {
res.Body.Close()
hj, ok := rw.(http.Hijacker)
if !ok {