message: fix http2 bug
diff: @@ -374,7 +374,7 @@ static int swPort_onRead_http(swReactor *reactor, swListenPort *port, swEvent *e
  }
  swoole_error_log(SW_LOG_TRACE, SW_ERROR_HTTP_INVALID_PROTOCOL, "get protocol failed.");
  #ifdef SW_HTTP_BAD_REQUEST_TIP
  - if (swConnection_send(conn, SW_STRL(SW_HTTP_BAD_REQUEST_TIP), 0) < 0)
  + _bad_request: if (swConnection_send(conn, SW_STRL(SW_HTTP_BAD_REQUEST_TIP), 0) < 0)
  {
  swSysError("send() failed.");
  }
  @@ -390,6 +390,11 @@ static int swPort_onRead_http(swReactor *reactor, swListenPort *port, swEvent *e
  #ifdef SW_USE_HTTP2
  else if (request->method == SW_HTTP_PRI)
  {
  + if (unlikely(!port->open_http2_protocol))
  + {
  + goto _bad_request;
  + }
  +
  conn->http2_stream = 1;
  swHttp2_send_setting_frame(protocol, conn);
  if (n == sizeof(SW_HTTP2_PRI_STRING) - 1)
  