HttpUploadServerHandler Class — netty Architecture

Source Code

example/src/main/java/io/netty/example/http/upload/HttpUploadServerHandler.java lines 66–453

public class HttpUploadServerHandler extends SimpleChannelInboundHandler<HttpObject> {

    private static final Logger logger = Logger.getLogger(HttpUploadServerHandler.class.getName());

    private HttpRequest request;

    private HttpData partialContent;

    private final StringBuilder responseContent = new StringBuilder();

    private static final HttpDataFactory factory =
            new DefaultHttpDataFactory(DefaultHttpDataFactory.MINSIZE); // Disk if size exceed

    private HttpPostRequestDecoder decoder;

    static {
        DiskFileUpload.deleteOnExitTemporaryFile = true; // should delete file
                                                         // on exit (in normal
                                                         // exit)
        DiskFileUpload.baseDirectory = null; // system temp directory
        DiskAttribute.deleteOnExitTemporaryFile = true; // should delete file on
                                                        // exit (in normal exit)
        DiskAttribute.baseDirectory = null; // system temp directory
    }

    @Override
    public void channelInactive(ChannelHandlerContext ctx) throws Exception {
        if (decoder != null) {
            decoder.cleanFiles();
        }
    }

    @Override
    public void channelRead0(ChannelHandlerContext ctx, HttpObject msg) throws Exception {
        if (msg instanceof HttpRequest) {
            HttpRequest request = this.request = (HttpRequest) msg;
            URI uri = new URI(request.uri());
            if (!uri.getPath().startsWith("/form")) {
                // Write Menu
                writeMenu(ctx);
                return;
            }
            responseContent.setLength(0);
            responseContent.append("WELCOME TO THE WILD WILD WEB SERVER\r\n");
            responseContent.append("===================================\r\n");

            responseContent.append("VERSION: " + request.protocolVersion().text() + "\r\n");

            responseContent.append("REQUEST_URI: " + request.uri() + "\r\n\r\n");
            responseContent.append("\r\n\r\n");

            // new getMethod
            for (Entry<String, String> entry : request.headers()) {
                responseContent.append("HEADER: " + entry.getKey() + '=' + entry.getValue() + "\r\n");
            }
            responseContent.append("\r\n\r\n");

            // new getMethod
            Set<Cookie> cookies;
            String value = request.headers().get(HttpHeaderNames.COOKIE);
            if (value == null) {
                cookies = Collections.emptySet();
            } else {
                cookies = ServerCookieDecoder.STRICT.decode(value);
            }
            for (Cookie cookie : cookies) {
                responseContent.append("COOKIE: " + cookie + "\r\n");
            }
            responseContent.append("\r\n\r\n");

            QueryStringDecoder decoderQuery = new QueryStringDecoder(request.uri());
            Map<String, List<String>> uriAttributes = decoderQuery.parameters();
            for (Entry<String, List<String>> attr: uriAttributes.entrySet()) {
                for (String attrVal: attr.getValue()) {
                    responseContent.append("URI: " + attr.getKey() + '=' + attrVal + "\r\n");
                }
            }
            responseContent.append("\r\n\r\n");

            // if GET Method: should not try to create an HttpPostRequestDecoder
            if (HttpMethod.GET.equals(request.method())) {