Examples of io.netty.handler.codec.http.QueryStringDecoder

io.netty.handler.codec.http.QueryStringDecoder
.io/s/hashdos">HashDOS vulnerability, the decoder limits the maximum number of decoded key-value parameter pairs, up to {@literal 1024} bydefault, and you can configure it when you construct the decoder by passing an additional integer parameter. @see QueryStringEncoder


    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        if (msg instanceof FullHttpRequest) {
            FullHttpRequest req = (FullHttpRequest) msg;
            QueryStringDecoder queryDecoder = new QueryStringDecoder(req.getUri());


            if (queryDecoder.path().startsWith(path)) {
                handleMessage(req, queryDecoder, ctx);
                req.release();
                return;
            }
        }

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                throw e;
            }


            try {
                container.logger().warn("Invalid URI: " + uri + ".  Attempting to parse query string.", e);
                QueryStringDecoder decoder = new QueryStringDecoder(uri);


                StringBuilder sb = new StringBuilder(decoder.path() + "?");


                for (Map.Entry<String, List<String>> p : decoder.parameters().entrySet()) {
                    for (String value : p.getValue()) {
                        sb.append(p.getKey()).append("=").append(URLEncoder.encode(value, "UTF-8"));
                    }
                }

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        this.contextPath = contextPath;
        this.uriParser = new URIParser(contextPath);
        uriParser.parse(request.getUri());
        this.inputStream = new NettyServletInputStream((HttpContent)request);
        this.reader = new BufferedReader(new InputStreamReader(inputStream));
        this.queryStringDecoder = new QueryStringDecoder(request.getUri());
        // setup the SSL security attributes
        this.channelHandlerContext = ctx;
        SslHandler sslHandler = channelHandlerContext.pipeline().get(SslHandler.class);
        if (sslHandler != null) {
            SSLSession session = sslHandler.engine().getSession();

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                throw e;
            }


            try {
                container.logger().warn("Invalid URI: " + uri + ".  Attempting to parse query string.", e);
                QueryStringDecoder decoder = new QueryStringDecoder(uri);


                StringBuilder sb = new StringBuilder(decoder.path() + "?");


                for (Map.Entry<String, List<String>> p : decoder.parameters().entrySet()) {
                    for (String value : p.getValue()) {
                        sb.append(p.getKey()).append("=").append(URLEncoder.encode(value, "UTF-8"));
                    }
                }

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    }


    @Override
    public void channelRead(final ChannelHandlerContext ctx, final Object msg) throws Exception {
        if (msg instanceof HttpRequest) {
            final QueryStringDecoder qsd = new QueryStringDecoder(request.getUri());
            final List<String> c = qsd.parameters().get("c");
            if (c == null) {
                ReferenceCountUtil.release(msg);
                respond(ctx, request.getProtocolVersion(), INTERNAL_SERVER_ERROR, "\"callback\" parameter required");
                ctx.fireUserEventTriggered(Event.CLOSE_SESSION);
                return;

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        }
    }


    @Override
    public void messageReceived(final ChannelHandlerContext ctx, final FullHttpRequest request) throws Exception {
        final String path = new QueryStringDecoder(request.getUri()).path();
        for (SockJsServiceFactory factory : factories.values()) {
            if (path.startsWith(factory.config().prefix())) {
                handleService(factory, request, ctx);
                return;
            }

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                                      final ChannelHandlerContext ctx) throws Exception {
        if (logger.isDebugEnabled()) {
            logger.debug("RequestUri : [{}]", request.getUri());
        }
        final String pathWithoutPrefix = request.getUri().replaceFirst(factory.config().prefix(), "");
        final String path = new QueryStringDecoder(pathWithoutPrefix).path();
        if (Greeting.matches(path)) {
            writeResponse(ctx.channel(), request, Greeting.response(request));
        } else if (Info.matches(path)) {
            writeResponse(ctx.channel(), request, Info.response(factory.config(), request));
        } else if (Iframe.matches(path)) {

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    public static boolean matches(final String path) {
        return path.startsWith("/iframe");
    }


    public static FullHttpResponse response(final SockJsConfig config, final HttpRequest request) throws Exception {
        final QueryStringDecoder qsd = new QueryStringDecoder(request.getUri());
        final String path = qsd.path();


        if (!PATH_PATTERN.matcher(path).matches()) {
            return createResponse(request, NOT_FOUND, copiedBuffer("Not found", UTF_8));
        }

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        }
        return contentType;
    }


    private static List<String> getDataFormParameter(final FullHttpRequest request) {
        final QueryStringDecoder decoder = new QueryStringDecoder('?' + request.content().toString(CharsetUtil.UTF_8));
        return decoder.parameters().get("d");
    }

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        }
        ctx.fireChannelRead(msg);
    }


    private static String getCallbackFromRequest(final HttpRequest request) {
        final QueryStringDecoder qsd = new QueryStringDecoder(request.getUri());
        final List<String> c = qsd.parameters().get("c");
        return c == null || c.isEmpty() ? "" : c.get(0);
    }

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