Function websocketExtensions

accept.go:334–355

(h http.Header)

}

func websocketExtensions(h http.Header) []websocketExtension {
	var exts []websocketExtension
	extStrs := headerTokens(h, "Sec-WebSocket-Extensions")
	for _, extStr := range extStrs {
		if extStr == "" {
			continue
		}

		vals := strings.Split(extStr, ";")
		for i := range vals {
			vals[i] = strings.TrimSpace(vals[i])
		}

		e := websocketExtension{
			name:   vals[0],
			params: vals[1:],
		}

		exts = append(exts, e)
	}
	return exts
}

func headerTokens(h http.Header, key string) []string {
	key = textproto.CanonicalMIMEHeaderKey(key)