com.predic8.membrane.core.transport.http.HttpServerRunnable.java Source code

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Here is the source code for com.predic8.membrane.core.transport.http.HttpServerRunnable.java

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/* Copyright 2009 predic8 GmbH, www.predic8.com
    
   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at
    
   http://www.apache.org/licenses/LICENSE-2.0
    
   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License. */

package com.predic8.membrane.core.transport.http;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.net.ConnectException;
import java.net.Socket;
import java.net.SocketException;
import java.net.SocketTimeoutException;
import java.net.UnknownHostException;

import javax.net.ssl.SSLSocket;

import org.apache.commons.logging.LogFactory;

import com.predic8.membrane.core.exchange.Exchange;
import com.predic8.membrane.core.http.Header;
import com.predic8.membrane.core.http.Request;
import com.predic8.membrane.core.util.*;

public class HttpServerRunnable extends AbstractHttpRunnable {

    public static int counter = 0;

    public HttpServerRunnable(Socket socket, HttpTransport transport) throws IOException {
        this.exchange = new Exchange();
        exchange.setServerThread(this);
        log = LogFactory.getLog(HttpServerRunnable.class.getName());
        counter++;
        log.debug("New ServerThread created. " + counter);
        this.sourceSocket = socket;
        srcIn = new BufferedInputStream(sourceSocket.getInputStream(), 2048);
        srcOut = new BufferedOutputStream(sourceSocket.getOutputStream(), 2048);
        sourceSocket.setSoTimeout(transport.getSocketTimeout());
        sourceSocket.setTcpNoDelay(transport.isTcpNoDelay());
        this.transport = transport;
        setClientSettings();
    }

    public void run() {
        try {
            while (true) {
                srcReq = new Request();
                srcReq.read(srcIn, true);

                exchange.setTimeReqReceived(System.currentTimeMillis());

                if (srcReq.getHeader().getProxyConnection() != null) {
                    srcReq.getHeader().add(Header.CONNECTION, srcReq.getHeader().getProxyConnection());
                    srcReq.getHeader().removeFields(Header.PROXY_CONNECTION);
                }

                process();

                if (srcReq.isCONNECTRequest()) {
                    log.debug("stopping HTTP Server Thread after establishing an HTTP connect");
                    return;
                }
                if (!srcReq.isKeepAlive() || !exchange.getResponse().isKeepAlive()) {
                    if (exchange.getTargetConnection() != null) {
                        exchange.getTargetConnection().close();
                        exchange.setTargetConnection(null);
                    }
                    break;
                }
                if (exchange.getResponse().isRedirect()) {
                    break;
                }
                exchange = new Exchange();
                exchange.setServerThread(this);

            }
        } catch (SocketTimeoutException e) {
            log.debug("Socket of thread " + counter + " timed out");
        } catch (SocketException se) {
            log.info("client socket closed");
        } catch (IOException e) {
            e.printStackTrace();
        } catch (EndOfStreamException e) {
            log.info("stream closed");
        } catch (AbortException e) {
            log.info("exchange aborted.");
        } catch (ErrorReadingStartLineException e) {
            log.info("Client connection terminated before start line was read. Start line so far: ("
                    + e.getStartLine() + ")");
        } catch (Exception e) {
            e.printStackTrace();
        }

        finally {
            if (srcReq.isCONNECTRequest())
                return;

            closeConnections();
        }

    }

    private void closeConnections() {

        try {
            if (!sourceSocket.isClosed()) {
                if (!(sourceSocket instanceof SSLSocket))
                    sourceSocket.shutdownOutput();
                sourceSocket.close();
            }
        } catch (Exception e2) {
            log.error("problems closing socket on remote port: " + sourceSocket.getPort() + " on remote host: "
                    + sourceSocket.getInetAddress());
            e2.printStackTrace();
        }
    }

    private void process() throws Exception {
        targetRes = null;
        try {

            exchange.setSourceHostname(
                    transport.getRouter().getDnsCache().getHostName(sourceSocket.getInetAddress()));
            exchange.setSourceIp(transport.getRouter().getDnsCache().getHostAddress(sourceSocket.getInetAddress()));

            exchange.setRequest(srcReq);
            exchange.setOriginalRequestUri(srcReq.getUri());

            invokeRequestHandlers(transport.getBackboneInterceptors());
            invokeRequestHandlers(getInterceptors());

            synchronized (exchange.getRequest()) {
                if (exchange.getRule().isBlockRequest()) {
                    exchange.setStopped();
                    block(exchange.getRequest());
                }
            }

            String dest = exchange.getDestinations().get(0);
            try {
                targetRes = client.call(exchange);
            } catch (ConnectException e) {
                targetRes = HttpUtil.createErrorResponse("Target " + dest + " is not reachable.");
                log.warn("Target " + dest + " is not reachable. " + e);
            } catch (UnknownHostException e) {
                targetRes = HttpUtil.createErrorResponse("Target host " + HttpUtil.getHostName(dest)
                        + " is unknown. DNS was unable to resolve host name.");
            }
            exchange.setResponse(targetRes);

            invokeResponseHandlers(exchange, getInterceptorsReverse(getInterceptors()));
            invokeResponseHandlers(exchange, getInterceptorsReverse(transport.getBackboneInterceptors()));

            synchronized (exchange.getResponse()) {
                if (exchange.getRule().isBlockResponse()) {
                    exchange.setStopped();
                    block(exchange.getResponse());
                }
            }

        } catch (AbortException e) {
            log.debug("Aborted");
            exchange.finishExchange(true, exchange.getErrorMessage());
            writeResponse(exchange.getResponse());

            log.debug("exchange set aborted");
            return;
        }

        writeResponse(targetRes);
        exchange.setCompleted();
        log.debug("exchange set completed");
    }

}