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check only 5 headers

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This commit is contained in:
WeidiDeng 2024-10-11 15:56:06 +08:00
parent b099cc4c2d
commit 519ed06414
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1 changed files with 11 additions and 6 deletions
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17
modules/caddyhttp/reverseproxy/reverseproxy.go
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@ -569,19 +569,24 @@ func (h *Handler) proxyLoopIteration(r *http.Request, origReq *http.Request, w h
return false, proxyErr
}
const canonicalWsHeaderPrefix = "Sec-Websocket"
// only 5 headers to check
var wsHeaderMapping = map[string]string{
"Sec-Websocket-Accept": "Sec-WebSocket-Accept",
"Sec-Websocket-Extensions": "Sec-WebSocket-Extensions",
"Sec-Websocket-Key": "Sec-WebSocket-Key",
"Sec-Websocket-Protocol": "Sec-WebSocket-Protocol",
"Sec-Websocket-Version": "Sec-WebSocket-Version",
}
// websocket header replacer, normally server doesn't care about this difference,
// but some do, and RFC use the case too
// gorilla/websocket, gobwas/ws all use this case too.
// see https://caddy.community/t/websockets-fail-venus-os-cerbo-gx-victron/25685
var wsHeaderReplacer = strings.NewReplacer(canonicalWsHeaderPrefix, "Sec-WebSocket")
func normalizeWsHeader(header http.Header) {
for k, v := range header {
if strings.HasPrefix(k, canonicalWsHeaderPrefix) {
header[wsHeaderReplacer.Replace(k)] = v
for k, rk := range wsHeaderMapping {
if v, ok := header[k]; ok {
delete(header, k)
header[rk] = v
}
}
}