channelRead0() — netty Function Reference

Source Code

example/src/main/java/io/netty/example/http/upload/HttpUploadServerHandler.java lines 98–199

    @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())) {
                // GET Method: should not try to create an HttpPostRequestDecoder
                // So stop here
                responseContent.append("\r\n\r\nEND OF GET CONTENT\r\n");
                // Not now: LastHttpContent will be sent writeResponse(ctx.channel());
                return;
            }
            try {
                decoder = new HttpPostRequestDecoder(factory, request);
            } catch (ErrorDataDecoderException e1) {
                e1.printStackTrace();
                responseContent.append(e1.getMessage());
                writeResponse(ctx.channel(), true);
                return;
            }

            boolean readingChunks = HttpUtil.isTransferEncodingChunked(request);
            responseContent.append("Is Chunked: " + readingChunks + "\r\n");
            responseContent.append("IsMultipart: " + decoder.isMultipart() + "\r\n");
            if (readingChunks) {
                // Chunk version
                responseContent.append("Chunks: ");
            }
        }

        // check if the decoder was constructed before
        // if not it handles the form get
        if (decoder != null) {
            if (msg instanceof HttpContent) {
                // New chunk is received
                HttpContent chunk = (HttpContent) msg;
                try {
                    decoder.offer(chunk);