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control/controlhttp: fix header case-sensitivity

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Change-Id: I49269bc969a80382997ec5c9de33c4f56d9dc787
Signed-off-by: Matthias Gabriel <matthias.gabriel@etit.tu-chemnitz.de>
This commit is contained in:
Matthias Gabriel 2023-01-13 11:53:13 +01:00 committed by Brad Fitzpatrick
parent 61dfbc0a6e
commit 355c3b2be7
1 changed files with 2 additions and 1 deletions
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3
control/controlhttp/server.go
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@ -12,6 +12,7 @@ import (
"io"
"net"
"net/http"
"strings"
"time"
"nhooyr.io/websocket"
@ -35,7 +36,7 @@ func AcceptHTTP(ctx context.Context, w http.ResponseWriter, r *http.Request, pri
}
func acceptHTTP(ctx context.Context, w http.ResponseWriter, r *http.Request, private key.MachinePrivate, earlyWrite func(protocolVersion int, w io.Writer) error) (_ *controlbase.Conn, retErr error) {
next := r.Header.Get("Upgrade")
next := strings.ToLower(r.Header.Get("Upgrade"))
if next == "" {
http.Error(w, "missing next protocol", http.StatusBadRequest)
return nil, errors.New("no next protocol in HTTP request")