/**
* Returns the content length of the specified web socket message. If the specified message is not
* a web socket message, {@code -1} is returned.
*/
private static int getWebSocketContentLength(HttpHeader message) {
// WebSockset messages have constant content-lengths.
if (message instanceof HttpRequestHeader) {
HttpRequestHeader req = (HttpRequestHeader) message;
if (HttpMethod.GET.equals(req.getMethod())
&& req.containsHeader(Names.SEC_WEBSOCKET_KEY1)
&& req.containsHeader(Names.SEC_WEBSOCKET_KEY2)) {
return 8;
}
} else if (message instanceof HttpResponseHeader) {
HttpResponseHeader res = (HttpResponseHeader) message;
if (res.getStatus().getCode() == 101
&& res.containsHeader(Names.SEC_WEBSOCKET_ORIGIN)
&& res.containsHeader(Names.SEC_WEBSOCKET_LOCATION)) {
return 16;
}
}
// Not a web socket message
return -1;
}
