Examples of io.undertow.server.HttpServerExchange$UpgradeCompletionListener

io.undertow.server.HttpServerExchange
Channel implementation that is actually provided to clients of the exchange. We do not provide the underlying conduit channel, as this will become the next requests conduit channel, so if a thread is still hanging onto this exchange it can result in problems.
It also delays a readResume call until the current call stack has returned, thus ensuring that only 1 thread is active in the exchange at any one time.
It also handles buffered request data.

    @Override
    public void dispatchMockRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException {


        final ByteBufferSlicePool bufferPool = new ByteBufferSlicePool(BufferAllocator.BYTE_BUFFER_ALLOCATOR, 1024, 1024);
        MockServerConnection connection = new MockServerConnection(bufferPool);
        HttpServerExchange exchange = new HttpServerExchange(connection);
        exchange.setRequestScheme(request.getScheme());
        exchange.setRequestMethod(new HttpString(request.getMethod()));
        exchange.setProtocol(Protocols.HTTP_1_0);
        exchange.setResolvedPath(request.getContextPath());
        String relative;
        if (request.getPathInfo() == null) {
            relative = request.getServletPath();
        } else {
            relative = request.getServletPath() + request.getPathInfo();
        }
        exchange.setRelativePath(relative);
        final ServletPathMatch info = paths.getServletHandlerByPath(request.getServletPath());
        final HttpServletResponseImpl oResponse = new HttpServletResponseImpl(exchange, servletContext);
        final HttpServletRequestImpl oRequest = new HttpServletRequestImpl(exchange, servletContext);
        final ServletRequestContext servletRequestContext = new ServletRequestContext(servletContext.getDeployment(), oRequest, oResponse, info);
        servletRequestContext.setServletRequest(request);
        servletRequestContext.setServletResponse(response);
        //set the max request size if applicable
        if (info.getServletChain().getManagedServlet().getMaxRequestSize() > 0) {
            exchange.setMaxEntitySize(info.getServletChain().getManagedServlet().getMaxRequestSize());
        }
        exchange.putAttachment(ServletRequestContext.ATTACHMENT_KEY, servletRequestContext);


        exchange.startBlocking(new ServletBlockingHttpExchange(exchange));
        servletRequestContext.setServletPathMatch(info);


        try {
            dispatchRequest(exchange, servletRequestContext, info.getServletChain(), DispatcherType.REQUEST);
        } catch (Exception e) {

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    @Override
    public void dispatchMockRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException {


        final ByteBufferSlicePool bufferPool = new ByteBufferSlicePool(BufferAllocator.BYTE_BUFFER_ALLOCATOR, 1024, 1024);
        MockServerConnection connection = new MockServerConnection(bufferPool);
        HttpServerExchange exchange = new HttpServerExchange(connection);
        exchange.setRequestScheme(request.getScheme());
        exchange.setRequestMethod(new HttpString(request.getMethod()));
        exchange.setProtocol(Protocols.HTTP_1_0);
        exchange.setResolvedPath(request.getContextPath());
        String relative;
        if (request.getPathInfo() == null) {
            relative = request.getServletPath();
        } else {
            relative = request.getServletPath() + request.getPathInfo();
        }
        exchange.setRelativePath(relative);
        final ServletPathMatch info = paths.getServletHandlerByPath(request.getServletPath());
        final HttpServletResponseImpl oResponse = new HttpServletResponseImpl(exchange, servletContext);
        final HttpServletRequestImpl oRequest = new HttpServletRequestImpl(exchange, servletContext);
        final ServletRequestContext servletRequestContext = new ServletRequestContext(servletContext.getDeployment(), oRequest, oResponse, info);
        servletRequestContext.setServletRequest(request);
        servletRequestContext.setServletResponse(response);
        //set the max request size if applicable
        if (info.getServletChain().getManagedServlet().getMaxRequestSize() > 0) {
            exchange.setMaxEntitySize(info.getServletChain().getManagedServlet().getMaxRequestSize());
        }
        exchange.putAttachment(ServletRequestContext.ATTACHMENT_KEY, servletRequestContext);


        exchange.startBlocking(new ServletBlockingHttpExchange(exchange));
        servletRequestContext.setServletPathMatch(info);


        try {
            dispatchRequest(exchange, servletRequestContext, info.getServletChain(), DispatcherType.REQUEST);
        } catch (Exception e) {

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            this.exchange = exchange;
        }


        @Override
        public void completed(final ClientExchange result) {
            HttpServerExchange exchange = result.getAttachment(EXCHANGE);
            final ClientResponse response = result.getResponse();
            final HeaderMap inboundResponseHeaders = response.getResponseHeaders();
            final HeaderMap outboundResponseHeaders = exchange.getResponseHeaders();
            exchange.setResponseCode(response.getResponseCode());
            copyHeaders(outboundResponseHeaders, inboundResponseHeaders);


            if (exchange.isUpgrade()) {
                exchange.upgradeChannel(new HttpUpgradeListener() {
                    @Override
                    public void handleUpgrade(StreamConnection streamConnection, HttpServerExchange exchange) {
                        StreamConnection clientChannel = null;
                        try {
                            clientChannel = result.getConnection().performUpgrade();


                            ChannelListeners.initiateTransfer(Long.MAX_VALUE, clientChannel.getSourceChannel(), streamConnection.getSinkChannel(), ChannelListeners.closingChannelListener(), ChannelListeners.<StreamSinkChannel>writeShutdownChannelListener(ChannelListeners.<StreamSinkChannel>flushingChannelListener(ChannelListeners.closingChannelListener(), ChannelListeners.closingChannelExceptionHandler()), ChannelListeners.closingChannelExceptionHandler()), ChannelListeners.closingChannelExceptionHandler(), ChannelListeners.closingChannelExceptionHandler(), result.getConnection().getBufferPool());
                            ChannelListeners.initiateTransfer(Long.MAX_VALUE, streamConnection.getSourceChannel(), clientChannel.getSinkChannel(), ChannelListeners.closingChannelListener(), ChannelListeners.<StreamSinkChannel>writeShutdownChannelListener(ChannelListeners.<StreamSinkChannel>flushingChannelListener(ChannelListeners.closingChannelListener(), ChannelListeners.closingChannelExceptionHandler()), ChannelListeners.closingChannelExceptionHandler()), ChannelListeners.closingChannelExceptionHandler(), ChannelListeners.closingChannelExceptionHandler(), result.getConnection().getBufferPool());


                        } catch (IOException e) {
                            IoUtils.safeClose(streamConnection, clientChannel);
                        }
                    }
                });
            }
            IoExceptionHandler handler = new IoExceptionHandler(exchange, result.getConnection());
            ChannelListeners.initiateTransfer(Long.MAX_VALUE, result.getResponseChannel(), exchange.getResponseChannel(), ChannelListeners.closingChannelListener(), new HTTPTrailerChannelListener(result, exchange), handler, handler, exchange.getConnection().getBufferPool());


        }

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    @Test
    public void testPredicateParser() {
        Predicate predicate = PredicateParser.parse("path[foo]", PredicateParsingTestCase.class.getClassLoader());
        Assert.assertTrue(predicate instanceof PathMatchPredicate);
        HttpServerExchange e = new HttpServerExchange(null);
        e.setRelativePath("/foo");
        Assert.assertTrue(predicate.resolve(e));
        e.setRelativePath("/bob");
        Assert.assertFalse(predicate.resolve(e));


        for (String string : new String[]{
                "not path[\"/foo\"]",
                "not path[foo] and true",
                "false or not path[path=/foo]",
                "false or not path[/foo]",
                "true and not path[foo] or not path[foo] and false"}) {
            try {
                predicate = PredicateParser.parse(string, PredicateParsingTestCase.class.getClassLoader());
                e = new HttpServerExchange(null);
                e.setRelativePath("/foo");
                Assert.assertFalse(predicate.resolve(e));
                e.setRelativePath("/bob");
                Assert.assertTrue(predicate.resolve(e));
            } catch (Throwable ex) {
                throw new RuntimeException("String " + string, ex);
            }
        }

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    }


    @Test
    public void testRegularExpressionsWithPredicateContext() {
        Predicate predicate = PredicateParser.parse("regex[pattern=a* , value=%{RELATIVE_PATH}] and equals[{$0, aaa}]", PredicateParsingTestCase.class.getClassLoader());
        HttpServerExchange e = new HttpServerExchange(null);
        e.putAttachment(Predicate.PREDICATE_CONTEXT, new HashMap<String, Object>());
        e.setRelativePath("aaab");
        Assert.assertTrue(predicate.resolve(e));
        e.setRelativePath("aaaab");
        Assert.assertFalse(predicate.resolve(e));


        predicate = PredicateParser.parse("regex[pattern='a(b*)a*' , value=%{RELATIVE_PATH}] and equals[$1, bb]", PredicateParsingTestCase.class.getClassLoader());
        e.putAttachment(Predicate.PREDICATE_CONTEXT, new HashMap<String, Object>());
        e.setRelativePath("abb");
        Assert.assertTrue(predicate.resolve(e));
        e.setRelativePath("abbaaa");
        Assert.assertTrue(predicate.resolve(e));
        e.setRelativePath("abbb");
        Assert.assertFalse(predicate.resolve(e));
    }

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                "contains[value=\"%{i,Content-Type}\", search={text}]",
                "contains[value=\"%{i,Content-Type}\", search={text, \"other text\"}]",
        }) {
            try {
                predicate = PredicateParser.parse(string, PredicateParsingTestCase.class.getClassLoader());
                HttpServerExchange e = new HttpServerExchange(null);
                Assert.assertFalse(predicate.resolve(e));
                e.getRequestHeaders().add(Headers.CONTENT_TYPE, "text");
                Assert.assertTrue(predicate.resolve(e));
            } catch (Throwable ex) {
                throw new RuntimeException("String " + string, ex);
            }
        }

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    }


    @Test
    public void testDefaultArrayValue() {
        Predicate predicate = PredicateParser.parse("equals[%{i,Content-Type},\"text/plain\"]", PredicateParsingTestCase.class.getClassLoader());
        HttpServerExchange e = new HttpServerExchange(null);
        Assert.assertFalse(predicate.resolve(e));
        e.getRequestHeaders().add(Headers.CONTENT_TYPE, "text/plain");
        Assert.assertTrue(predicate.resolve(e));
    }

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    }


    private void expect(String string, boolean result1, boolean result2) {
        try {
            Predicate predicate = PredicateParser.parse(string, PredicateParsingTestCase.class.getClassLoader());
            HttpServerExchange e = new HttpServerExchange(null);
            e.getRequestHeaders().add(Headers.TRAILER, "a");
            Assert.assertEquals(result1, predicate.resolve(e));
            e.getRequestHeaders().add(Headers.CONTENT_LENGTH, "a");
            Assert.assertEquals(result2, predicate.resolve(e));
        } catch (Throwable ex) {
            throw new RuntimeException("String " + string, ex);
        }
    }

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    @Override
    public void dispatchMockRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException {


        final ByteBufferSlicePool bufferPool = new ByteBufferSlicePool(BufferAllocator.BYTE_BUFFER_ALLOCATOR, 1024, 1024);
        MockServerConnection connection = new MockServerConnection(bufferPool);
        HttpServerExchange exchange = new HttpServerExchange(connection);
        exchange.setRequestScheme(request.getScheme());
        exchange.setRequestMethod(new HttpString(request.getMethod()));
        exchange.setProtocol(Protocols.HTTP_1_0);
        exchange.setResolvedPath(request.getContextPath());
        String relative;
        if (request.getPathInfo() == null) {
            relative = request.getServletPath();
        } else {
            relative = request.getServletPath() + request.getPathInfo();
        }
        exchange.setRelativePath(relative);
        final ServletPathMatch info = paths.getServletHandlerByPath(request.getServletPath());
        final HttpServletResponseImpl oResponse = new HttpServletResponseImpl(exchange, servletContext);
        final HttpServletRequestImpl oRequest = new HttpServletRequestImpl(exchange, servletContext);
        final ServletRequestContext servletRequestContext = new ServletRequestContext(servletContext.getDeployment(), oRequest, oResponse, info);
        servletRequestContext.setServletRequest(request);
        servletRequestContext.setServletResponse(response);
        //set the max request size if applicable
        if (info.getServletChain().getManagedServlet().getMaxRequestSize() > 0) {
            exchange.setMaxEntitySize(info.getServletChain().getManagedServlet().getMaxRequestSize());
        }
        exchange.putAttachment(ServletRequestContext.ATTACHMENT_KEY, servletRequestContext);


        exchange.startBlocking(new ServletBlockingHttpExchange(exchange));
        servletRequestContext.setServletPathMatch(info);


        try {
            dispatchRequest(exchange, servletRequestContext, info.getServletChain(), DispatcherType.REQUEST);
        } catch (Exception e) {

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            throw UndertowServletMessages.MESSAGES.asyncRequestAlreadyDispatched();
        }


        HttpServletRequestImpl requestImpl = servletRequestContext.getOriginalRequest();
        HttpServletResponseImpl responseImpl = servletRequestContext.getOriginalResponse();
        final HttpServerExchange exchange = requestImpl.getExchange();


        exchange.getAttachment(ServletRequestContext.ATTACHMENT_KEY).setDispatcherType(DispatcherType.ASYNC);


        requestImpl.setAttribute(ASYNC_REQUEST_URI, requestImpl.getOriginalRequestURI());
        requestImpl.setAttribute(ASYNC_CONTEXT_PATH, requestImpl.getOriginalContextPath());
        requestImpl.setAttribute(ASYNC_SERVLET_PATH, requestImpl.getOriginalServletPath());
        requestImpl.setAttribute(ASYNC_QUERY_STRING, requestImpl.getOriginalQueryString());

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