Examples with ChannelFuture org.jboss.netty.channel.ChannelFuture used on opensource projects

Example 31 with ChannelFuture

use of org.jboss.netty.channel.ChannelFuture in project load-balancer by RestComm.

the class HttpRequestHandler method writeStatisticResponse.

private void writeStatisticResponse(MessageEvent e) {
    GsonBuilder builder = new GsonBuilder();
    Gson gson = builder.setPrettyPrinting().create();
    JsonElement je = gson.toJsonTree(new StatisticObject(balancerRunner));
    JsonObject jo = new JsonObject();
    jo.add("Metrics", je);
    String output = jo.toString();
    HttpResponse response = new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
    response.setHeader(HttpHeaders.Names.CONTENT_TYPE, APPLICATION_JSON);
    ChannelBuffer buf = ChannelBuffers.copiedBuffer(output, Charset.forName("UTF-8"));
    response.setContent(buf);
    ChannelFuture future = e.getChannel().write(response);
    future.addListener(ChannelFutureListener.CLOSE);
}

Example 32 with ChannelFuture

use of org.jboss.netty.channel.ChannelFuture in project load-balancer by RestComm.

the class HttpRequestHandler method writeResponse.

private void writeResponse(MessageEvent e, HttpResponseStatus status, String responseString) {
    // Convert the response content to a ChannelBuffer.
    ChannelBuffer buf = ChannelBuffers.copiedBuffer(responseString, Charset.forName("UTF-8"));
    // Decide whether to close the connection or not.
    boolean close = HttpHeaders.Values.CLOSE.equalsIgnoreCase(request.getHeader(HttpHeaders.Names.CONNECTION)) || request.getProtocolVersion().equals(HttpVersion.HTTP_1_0) && !HttpHeaders.Values.KEEP_ALIVE.equalsIgnoreCase(request.getHeader(HttpHeaders.Names.CONNECTION));
    // Build the response object.
    HttpResponse response = new DefaultHttpResponse(HttpVersion.HTTP_1_1, status);
    response.setContent(buf);
    response.setHeader(HttpHeaders.Names.CONTENT_TYPE, "text/plain; charset=UTF-8");
    if (!close) {
        // There's no need to add 'Content-Length' header
        // if this is the last response.
        response.setHeader(HttpHeaders.Names.CONTENT_LENGTH, String.valueOf(buf.readableBytes()));
    }
    String cookieString = request.getHeader(HttpHeaders.Names.COOKIE);
    if (cookieString != null) {
        CookieDecoder cookieDecoder = new CookieDecoder();
        Set<Cookie> cookies = cookieDecoder.decode(cookieString);
        if (!cookies.isEmpty()) {
            // Reset the cookies if necessary.
            CookieEncoder cookieEncoder = new CookieEncoder(true);
            for (Cookie cookie : cookies) {
                cookieEncoder.addCookie(cookie);
            }
            response.addHeader(HttpHeaders.Names.SET_COOKIE, cookieEncoder.encode());
        }
    }
    // Write the response.
    ChannelFuture future = null;
    if (status.equals(HttpResponseStatus.SERVICE_UNAVAILABLE) || status.equals(HttpResponseStatus.LOCKED))
        future = e.getChannel().write(buf);
    else
        future = e.getChannel().write(response);
    // Close the connection after the write operation is done if necessary.
    if (close) {
        future.addListener(ChannelFutureListener.CLOSE);
    }
}

Example 33 with ChannelFuture

use of org.jboss.netty.channel.ChannelFuture in project load-balancer by RestComm.

the class HttpRequestHandler method sendRedirectResponse.

private void sendRedirectResponse(MessageEvent e, HttpRequest request) {
    HttpResponse response = new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.FOUND);
    String host = request.getHeader("Host");
    host = host.replace(balancerRunner.balancerContext.lbConfig.getHttpConfiguration().getHttpPort().toString(), balancerRunner.balancerContext.lbConfig.getHttpConfiguration().getHttpsPort().toString());
    response.setHeader("Location", "https://" + host + request.getUri());
    ChannelFuture future = e.getChannel().write(response);
    future.addListener(ChannelFutureListener.CLOSE);
}

Example 34 with ChannelFuture

use of org.jboss.netty.channel.ChannelFuture in project load-balancer by RestComm.

the class HttpRequestHandler method writeInfoResponse.

private void writeInfoResponse(MessageEvent e) {
    GsonBuilder builder = new GsonBuilder();
    Gson gson = builder.setPrettyPrinting().create();
    JsonElement je = gson.toJsonTree(new NodesInfoObject(balancerRunner));
    JsonObject jo = new JsonObject();
    jo.add("Nodes info", je);
    String output = jo.toString();
    HttpResponse response = new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
    ChannelBuffer buf = ChannelBuffers.copiedBuffer(output, Charset.forName("UTF-8"));
    response.setContent(buf);
    ChannelFuture future = e.getChannel().write(response);
    future.addListener(ChannelFutureListener.CLOSE);
}

Example 35 with ChannelFuture

use of org.jboss.netty.channel.ChannelFuture in project load-balancer by RestComm.

the class HttpRequestHandler method handleHttpRequest.

private void handleHttpRequest(ChannelHandlerContext ctx, final MessageEvent e) throws Exception {
    String currAddress = e.getRemoteAddress().toString();
    semaphore = semaphoreMap.get(currAddress);
    if (semaphore == null) {
        semaphore = new Semaphore(1);
        Semaphore tempSemaphore = semaphoreMap.putIfAbsent(currAddress, semaphore);
        if (tempSemaphore != null)
            semaphore = tempSemaphore;
    }
    try {
        semaphore.acquire();
    } catch (InterruptedException ex) {
    }
    if (!readingChunks && e.getMessage() instanceof HttpRequest) {
        request = (HttpRequest) e.getMessage();
        if (logger.isDebugEnabled()) {
            logger.debug("Request URI accessed: " + request.getUri() + " channel " + e.getChannel());
        }
        if (HttpChannelAssociations.urlRewriteFilter != null)
            HttpChannelAssociations.urlRewriteFilter.doFilter(request, e);
        AdvancedChannel currentAC = HttpChannelAssociations.channels.get(new AdvancedChannel(e.getChannel()));
        Channel associatedChannel = null;
        if (currentAC != null)
            associatedChannel = currentAC.getChannel();
        InvocationContext invocationContext = balancerRunner.getLatestInvocationContext();
        // SIPNode node = null;
        try {
            // TODO: If WebSocket request, choose a NODE that is able to
            // handle WebSocket requests (has a websocket connector)
            node = invocationContext.balancerAlgorithm.processHttpRequest(request);
        } catch (Exception ex) {
            StringWriter sw = new StringWriter();
            ex.printStackTrace(new PrintWriter(sw));
            logger.warn("Problem in balancer algorithm", ex);
            writeResponse(e, HttpResponseStatus.INTERNAL_SERVER_ERROR, "Load Balancer Error: Exception in the balancer algorithm:\n" + sw.toString());
            return;
        }
        if (node == null) {
            if (logger.isInfoEnabled()) {
                logger.info("Service unavailable. No server is available.");
            }
            writeResponse(e, HttpResponseStatus.SERVICE_UNAVAILABLE, IOUtils.toString(this.getClass().getClassLoader().getResourceAsStream("500.html")));
            return;
        }
        if (associatedChannel != null && associatedChannel.isConnected()) {
            semaphore.release();
            associatedChannel.write(request);
        } else {
            e.getChannel().getCloseFuture().addListener(new ChannelFutureListener() {

                public void operationComplete(ChannelFuture arg0) throws Exception {
                    closeChannelPair(arg0.getChannel());
                }
            });
            // Start the connection attempt.
            ChannelFuture future = null;
            Set<String> headers = request.getHeaderNames();
            if (headers.contains("Sec-WebSocket-Protocol")) {
                if (request.getHeader("Sec-WebSocket-Protocol").equalsIgnoreCase("sip")) {
                    if (logger.isDebugEnabled()) {
                        logger.debug("New SIP over WebSocket request. WebSocket uri: " + request.getUri());
                        logger.debug("Dispatching WebSocket request to node: " + node.getIp() + " port: " + node.getProperties().get("wsPort"));
                    }
                    wsrequest = true;
                    wsVersion = request.getHeader(Names.SEC_WEBSOCKET_VERSION);
                    websocketServerPipelineFactory = new WebsocketModifyClientPipelineFactory();
                    future = HttpChannelAssociations.inboundBootstrap.connect(new InetSocketAddress(node.getIp(), Integer.parseInt(node.getProperties().get("wsPort"))));
                }
            } else {
                if (!isSecured) {
                    if (logger.isDebugEnabled()) {
                        logger.debug("Dispatching HTTP request to node: " + node.getIp() + " port: " + node.getProperties().get("httpPort"));
                    }
                    future = HttpChannelAssociations.inboundBootstrap.connect(new InetSocketAddress(node.getIp(), Integer.parseInt(node.getProperties().get("httpPort"))));
                } else {
                    if (logger.isDebugEnabled()) {
                        logger.debug("Dispatching HTTPS request to node: " + node.getIp() + " port: " + node.getProperties().get("sslPort"));
                    }
                    future = HttpChannelAssociations.inboundSecureBootstrap.connect(new InetSocketAddress(node.getIp(), Integer.parseInt(node.getProperties().get("sslPort"))));
                }
            }
            future.addListener(new ChannelFutureListener() {

                public void operationComplete(ChannelFuture arg0) throws Exception {
                    Channel channel = arg0.getChannel();
                    if (pattern != null && pattern.matcher(request.getUri()).find()) {
                        logger.info("request : " + request.getUri() + " matches to pattern : " + pattern);
                        HttpChannelAssociations.channels.put(new AdvancedChannel(e.getChannel(), true), new AdvancedChannel(channel, true));
                        HttpChannelAssociations.channels.put(new AdvancedChannel(channel, true), new AdvancedChannel(e.getChannel(), true));
                    } else {
                        HttpChannelAssociations.channels.put(new AdvancedChannel(e.getChannel(), false), new AdvancedChannel(channel, false));
                        HttpChannelAssociations.channels.put(new AdvancedChannel(channel, false), new AdvancedChannel(e.getChannel(), false));
                    }
                    if (request.isChunked()) {
                        readingChunks = true;
                    }
                    semaphore.release();
                    channel.write(request);
                    if (wsrequest) {
                        if (logger.isDebugEnabled()) {
                            logger.debug("This is a websocket request, changing the pipeline");
                        }
                        // Modify the Client Pipeline - Phase 1
                        ChannelPipeline p = channel.getPipeline();
                        websocketServerPipelineFactory.upgradeClientPipelineFactoryPhase1(p, wsVersion);
                    }
                    channel.getCloseFuture().addListener(new ChannelFutureListener() {

                        public void operationComplete(ChannelFuture arg0) throws Exception {
                            closeChannelPair(arg0.getChannel());
                        }
                    });
                }
            });
        }
    } else {
        HttpChunk chunk = (HttpChunk) e.getMessage();
        if (chunk.isLast()) {
            readingChunks = false;
        }
        semaphore.release();
        HttpChannelAssociations.channels.get(new AdvancedChannel(e.getChannel())).getChannel().write(chunk);
        if (logger.isDebugEnabled())
            logger.debug("Send chunked request from : " + e.getChannel().getLocalAddress() + " to : " + e.getChannel().getRemoteAddress() + " capacity : " + chunk.getContent().capacity());
    }
}