Examples of org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler

org.eclipse.jetty.server.AbstractHttpConnection

A HttpConnection represents the connection of a HTTP client to the server and is created by an instance of a {@link Connector}. It's prime function is to associate {@link Request} and {@link Response} instances with a {@link EndPoint}.

A connection is also the prime mechanism used by jetty to recycle objects without pooling. The {@link Request}, {@link Response}, {@link HttpParser}, {@link HttpGenerator}and {@link HttpFields} instances are all recycled for the duraction ofa connection. Where appropriate, allocated buffers are also kept associated with the connection via the parser and/or generator.

The connection state is held by 3 separate state machines: The request state, the response state and the continuation state. All three state machines must be driven to completion for every request, and all three can complete in any order.

The HttpConnection support protocol upgrade. If on completion of a request, the response code is 101 (switch protocols), then the org.eclipse.jetty.io.Connection request attribute is checked to see if there is a new Connection instance. If so, the new connection is returned from {@link #handle()} and is used for futurehandling of the underlying connection. Note that for switching protocols that don't use 101 responses (eg CONNECT), the response should be sent and then the status code changed to 101 before returning from the handler. Implementors of new Connection types should be careful to extract any buffered data from (HttpParser)http.getParser()).getHeaderBuffer() and (HttpParser)http.getParser()).getBodyBuffer() to initialise their new connection.

    }


    public ByteArrayBuffer getResponse(String uri, int port, Map extraEnv)
            throws Exception {
        // get the current, previously active connection if one exists
        AbstractHttpConnection conn = AbstractHttpConnection
                .getCurrentConnection();


        // Identify the effective server name for this request
        Request parentRequest = (conn == null ? null : conn.getRequest());
        String host = (parentRequest == null ? "localhost:" + port //
                : parentRequest.getHeader("Host"));


        // construct an HTTP request for this data
        StringBuilder requestHeader = new StringBuilder();

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    /**
     * This must be called within the context of an active HTTP request.
     */
    private static ConnectionTimeoutPreventer newTimeoutPreventor() {
        AbstractHttpConnection httpConnection = AbstractHttpConnection.getCurrentConnection();
        if (httpConnection == null) {
            LOGGER.log(Level.FINE, "No HttpConnection boundto local thread: " + Thread.currentThread().getName());
            return new ConnectionTimeoutPreventer() {
                @Override
                public void connectionActive() {
                }
            };
        } else {
            //call code reflectively because by default we have no access to jetty internal classes from a webapp
            // thus by only using HttpConnection we only need to add "-org.eclipse.jetty.server.HttpConnection" to server classes
            // to allow access to this class from a webapp
            final Object endpoint = httpConnection.getEndPoint();
            // try to cancel IDLE time
            try {
                LOGGER.fine("TimeoutPreventor - Invoking cancelIdle() method on endpoint class " + endpoint.getClass().getName());
                Method cancelIdle = endpoint.getClass().getMethod("cancelIdle");
                cancelIdle.invoke(endpoint);

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              } else if (callback instanceof PasswordCallback) {
                ((PasswordCallback) callback).setPassword((char[]) credentials.toString().toCharArray());
              } else if (callback instanceof ObjectCallback) {
                ((ObjectCallback) callback).setObject(credentials);
              } else if (callback instanceof RequestParameterCallback) {
                AbstractHttpConnection connection = AbstractHttpConnection.getCurrentConnection();
                Request request = (connection == null ? null : connection.getRequest());


                if (request != null) {
                  RequestParameterCallback rpc = (RequestParameterCallback) callback;
                  rpc.setParameterValues(Arrays.asList(request.getParameterValues(rpc.getParameterName())));
                }

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    this.gson = prettyGson;
  }


  @Override
  public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException {
    AbstractHttpConnection connection = AbstractHttpConnection.getCurrentConnection();
    connection.getRequest().setHandled(true);


    response.setContentType(MimeTypes.TEXT_PLAIN);


    Map<String, Object> errorMap = new LinkedHashMap<String, Object>();
    int code = connection.getResponse().getStatus();
    errorMap.put("status", code);
    String message = connection.getResponse().getReason();
    if (message == null) {
      message = HttpStatus.getMessage(code);
    }
    errorMap.put("message", message);

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      if (logger.isLoggable(logStatus)) {
        TreeLogger branch = logger.branch(logStatus, String.valueOf(status)
            + " - " + request.getMethod() + ' ' + request.getUri() + " ("
            + userString + request.getRemoteHost() + ')' + bytesString);
        if (branch.isLoggable(logHeaders)) {
          AbstractHttpConnection connection = request.getConnection();
          logHeaders(branch.branch(logHeaders, "Request headers"), logHeaders,
              connection.getRequestFields());
          logHeaders(branch.branch(logHeaders, "Response headers"), logHeaders,
              connection.getResponseFields());
        }
      }
    }

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            byte[] requestBytes = request.getRequestBytes();


            ByteArrayEndPoint endPoint = new ByteArrayEndPoint(requestBytes, 1024);
            endPoint.setGrowOutput(true);


            AbstractHttpConnection connection = new BlockingHttpConnection(ReverseHTTPConnector.this, endPoint, getServer());
            
            connectionOpened(connection);
            try
            {
                // Loop over the whole content, since handle() only
                // reads up to the connection buffer's capacities
                while (endPoint.getIn().length() > 0)
                    connection.handle();


                byte[] responseBytes = endPoint.getOut().asArray();
                RHTTPResponse response = RHTTPResponse.fromResponseBytes(request.getId(), responseBytes);
                client.deliver(response);
            }

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        UserDataConstraint dataConstraint = roleInfo.getUserDataConstraint();
        if (dataConstraint == null || dataConstraint == UserDataConstraint.None)
        {
            return true;
        }
        AbstractHttpConnection connection = AbstractHttpConnection.getCurrentConnection();
        Connector connector = connection.getConnector();


        if (dataConstraint == UserDataConstraint.Integral)
        {
            if (connector.isIntegral(request))
                return true;

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        // Transfer unread data from old connection to new connection
        // We need to copy the data to avoid races:
        // 1. when this unread data is written and the server replies before the clientToProxy
        // connection is installed (it is only installed after returning from this method)
        // 2. when the client sends data before this unread data has been written.
        AbstractHttpConnection httpConnection = AbstractHttpConnection.getCurrentConnection();
        Buffer headerBuffer = ((HttpParser)httpConnection.getParser()).getHeaderBuffer();
        Buffer bodyBuffer = ((HttpParser)httpConnection.getParser()).getBodyBuffer();
        int length = headerBuffer == null ? 0 : headerBuffer.length();
        length += bodyBuffer == null ? 0 : bodyBuffer.length();
        IndirectNIOBuffer buffer = null;
        if (length > 0)
        {

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        upgradeConnection(request, response, clientToProxy);
    }


    private ClientToProxyConnection prepareConnections(ConcurrentMap<String, Object> context, SocketChannel channel, Buffer buffer)
    {
        AbstractHttpConnection httpConnection = AbstractHttpConnection.getCurrentConnection();
        ProxyToServerConnection proxyToServer = newProxyToServerConnection(context, buffer);
        ClientToProxyConnection clientToProxy = newClientToProxyConnection(context, channel, httpConnection.getEndPoint(), httpConnection.getTimeStamp());
        clientToProxy.setConnection(proxyToServer);
        proxyToServer.setConnection(clientToProxy);
        return clientToProxy;
    }

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    /* 
     * @see org.eclipse.jetty.server.server.Handler#handle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, int)
     */
    public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException
    {
        AbstractHttpConnection connection = AbstractHttpConnection.getCurrentConnection();
        connection.getRequest().setHandled(true);
        String method = request.getMethod();
        if(!method.equals(HttpMethods.GET) && !method.equals(HttpMethods.POST) && !method.equals(HttpMethods.HEAD))
            return;
        response.setContentType(MimeTypes.TEXT_HTML_8859_1);    
        if (_cacheControl!=null)
            response.setHeader(HttpHeaders.CACHE_CONTROL, _cacheControl);
        ByteArrayISO8859Writer writer= new ByteArrayISO8859Writer(4096);
        handleErrorPage(request, writer, connection.getResponse().getStatus(), connection.getResponse().getReason());
        writer.flush();
        response.setContentLength(writer.size());
        writer.writeTo(response.getOutputStream());
        writer.destroy();
    }

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