org.archive.wayback.domainprefix.DomainPrefixRequestParser.java Source code

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Here is the source code for org.archive.wayback.domainprefix.DomainPrefixRequestParser.java

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/* DomainPrefixRequestParser
 *
 * $Id$
 *
 * Created on 10:20:21 AM Aug 10, 2007.
 *
 * Copyright (C) 2007 Internet Archive.
 *
 * This file is part of wayback-core.
 *
 * wayback-core is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * any later version.
 *
 * wayback-core is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser Public License
 * along with wayback-core; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package org.archive.wayback.domainprefix;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.httpclient.URIException;
import org.archive.wayback.WaybackConstants;
import org.archive.wayback.core.Timestamp;
import org.archive.wayback.core.WaybackRequest;
import org.archive.wayback.exception.BadQueryException;
import org.archive.wayback.requestparser.BaseRequestParser;
import org.archive.wayback.webapp.AccessPoint;

/**
 *
 *
 * @author brad
 * @version $Date$, $Revision$
 */
public class DomainPrefixRequestParser extends BaseRequestParser {

    String hostPort = "localhost:8081";

    private final Pattern REPLAY_REGEX = Pattern.compile("^(\\d{1,14})\\.(.*)$");
    private final Pattern QUERY_REGEX = Pattern.compile("^(\\d{0,13})\\*\\.(.*)$");

    private String getRequestString(final String host, HttpServletRequest httpRequest) {
        String path = httpRequest.getRequestURI();
        String query = httpRequest.getQueryString();

        String r = "";
        if (path == null) {
            path = "/";
        }
        if (query != null && query.length() > 0) {
            r = "http://" + host + path + "?" + query;
        } else {
            r = "http://" + host + path;
        }
        return r;
    }

    /* (non-Javadoc)
     * @see org.archive.wayback.RequestParser#parse(javax.servlet.http.HttpServletRequest, org.archive.wayback.webapp.WaybackContext)
     */
    public WaybackRequest parse(HttpServletRequest httpRequest, AccessPoint wbContext) throws BadQueryException {

        WaybackRequest wbRequest = null;
        String server = httpRequest.getServerName() + ":" + httpRequest.getServerPort();
        if (server.endsWith(hostPort)) {
            int length = server.length() - hostPort.length();
            if (server.length() > hostPort.length()) {
                String prefix = server.substring(0, length - 1);
                Matcher replayMatcher = REPLAY_REGEX.matcher(prefix);
                if (replayMatcher != null && replayMatcher.matches()) {
                    wbRequest = new WaybackRequest();
                    String dateStr = replayMatcher.group(1);
                    String host = replayMatcher.group(2);

                    String requestUrl = getRequestString(host, httpRequest);

                    wbRequest.put(WaybackConstants.REQUEST_EXACT_DATE, dateStr);
                    wbRequest.put(WaybackConstants.REQUEST_TYPE, WaybackConstants.REQUEST_REPLAY_QUERY);
                    try {
                        wbRequest.setRequestUrl(requestUrl);
                    } catch (URIException e) {
                        e.printStackTrace();
                        wbRequest = null;
                    }
                } else {
                    Matcher queryMatcher = QUERY_REGEX.matcher(prefix);
                    if (queryMatcher != null && queryMatcher.matches()) {
                        wbRequest = new WaybackRequest();
                        String dateStr = queryMatcher.group(1);
                        String host = queryMatcher.group(2);
                        String startDate;
                        String endDate;
                        if (dateStr.length() == 0) {
                            startDate = getEarliestTimestamp();
                            endDate = getLatestTimestamp();
                        } else {
                            startDate = Timestamp.parseBefore(dateStr).getDateStr();
                            endDate = Timestamp.parseAfter(dateStr).getDateStr();
                        }
                        wbRequest.put(WaybackConstants.REQUEST_START_DATE, startDate);
                        wbRequest.put(WaybackConstants.REQUEST_END_DATE, endDate);
                        wbRequest.put(WaybackConstants.REQUEST_TYPE, WaybackConstants.REQUEST_URL_QUERY);

                        String requestUrl = getRequestString(host, httpRequest);

                        try {
                            wbRequest.setRequestUrl(requestUrl);
                        } catch (URIException e) {
                            e.printStackTrace();
                            wbRequest = null;
                        }
                    }
                }
            }
        }
        return wbRequest;
    }

    /**
     * @return the hostPort
     */
    public String getHostPort() {
        return hostPort;
    }

    /**
     * @param hostPort the hostPort to set
     */
    public void setHostPort(String hostPort) {
        this.hostPort = hostPort;
    }
}