@Override public void process(final HttpRequest request, final HttpContext context) throws HttpException, IOException { Args.notNull(request, "HTTP request"); final String method = request.getRequestLine().getMethod(); if (method.equalsIgnoreCase("CONNECT")) { request.setHeader(PROXY_CONN_DIRECTIVE, HTTP.CONN_KEEP_ALIVE); return; } final HttpClientContext clientContext = HttpClientContext.adapt(context); // Obtain the client connection (required) final RouteInfo route = clientContext.getHttpRoute(); if (route == null) { this.log.debug("Connection route not set in the context"); return; } if (route.getHopCount() == 1 || route.isTunnelled()) { if (!request.containsHeader(HTTP.CONN_DIRECTIVE)) { request.addHeader(HTTP.CONN_DIRECTIVE, HTTP.CONN_KEEP_ALIVE); } } if (route.getHopCount() == 2 && !route.isTunnelled()) { if (!request.containsHeader(PROXY_CONN_DIRECTIVE)) { request.addHeader(PROXY_CONN_DIRECTIVE, HTTP.CONN_KEEP_ALIVE); } } }