modify response(Bad Gateway:xxxxxxx)

[wolflowhereu]

`private boolean respondWithShortCircuitResponse(HttpResponse httpResponse) {
// we are sending a response to the client, so we are done handling this request
this.currentRequest = null;

    HttpResponse filteredResponse = (HttpResponse) currentFilters.proxyToClientResponse(httpResponse);
    if (filteredResponse == null) {
        disconnect();
        return false;
    }

    // allow short-circuit messages to close the connection. normally the Connection header would be stripped when modifying
    // the message for proxying, so save the keep-alive status before the modifications are made.
    boolean isKeepAlive = HttpHeaders.isKeepAlive(httpResponse);

    // if the response is not a Bad Gateway or Gateway Timeout, modify the headers "as if" the short-circuit response were proxied
    int statusCode = httpResponse.getStatus().code();
    if (statusCode != HttpResponseStatus.BAD_GATEWAY.code() && statusCode != HttpResponseStatus.GATEWAY_TIMEOUT.code()) {
        modifyResponseHeadersToReflectProxying(httpResponse);
    }

    // restore the keep alive status, if it was overwritten when modifying headers for proxying
    HttpHeaders.setKeepAlive(httpResponse, isKeepAlive);

    write(httpResponse);

    if (ProxyUtils.isLastChunk(httpResponse)) {
        writeEmptyBuffer();
    }

    if (!HttpHeaders.isKeepAlive(httpResponse)) {
        disconnect();
        return false;
    }

    return true;
}`

HttpResponse filteredResponse = (HttpResponse) currentFilters.proxyToClientResponse(httpResponse);

I try to use filteredResponse repeat httpResponse, but this not support; why not use filteredResponse to write????

[wolflowhereu]

write(filteredResponse);

[AleksejsGrocevs]

Fix proposed in #383 pull request