com.jaeksoft.searchlib.web.SearchServlet.java Source code

Introduction

Here is the source code for com.jaeksoft.searchlib.web.SearchServlet.java

Source

/**   
 * License Agreement for OpenSearchServer
 *
 * Copyright (C)2011-2012 Emmanuel Keller / Jaeksoft
 * 
 * http://www.open-search-server.com
 * 
 * This file is part of OpenSearchServer.
 *
 * OpenSearchServer is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 * OpenSearchServer 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with OpenSearchServer. 
 *  If not, see <http://www.gnu.org/licenses/>.
 **/
package com.jaeksoft.searchlib.web;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URISyntaxException;
import java.net.URLEncoder;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.xpath.XPathExpressionException;

import org.apache.commons.lang.StringUtils;
import org.xml.sax.SAXException;

import com.jaeksoft.searchlib.Client;
import com.jaeksoft.searchlib.SearchLibException;
import com.jaeksoft.searchlib.analysis.LanguageEnum;
import com.jaeksoft.searchlib.api.ApiManager;
import com.jaeksoft.searchlib.function.expression.SyntaxError;
import com.jaeksoft.searchlib.query.ParseException;
import com.jaeksoft.searchlib.render.Render;
import com.jaeksoft.searchlib.render.RenderOpenSearch;
import com.jaeksoft.searchlib.request.AbstractSearchRequest;
import com.jaeksoft.searchlib.result.AbstractResultSearch;
import com.jaeksoft.searchlib.user.Role;
import com.jaeksoft.searchlib.user.User;

public class SearchServlet extends AbstractServlet {
    /**
     * 
     */
    private static final long serialVersionUID = 4440539263609727717L;

    @Override
    protected void doRequest(ServletTransaction transaction) throws ServletException {
        try {

            User user = transaction.getLoggedUser();
            if (user != null && !user.hasRole(transaction.getIndexName(), Role.INDEX_QUERY))
                throw new SearchLibException("Not permitted");

            Client client = transaction.getClientApi(getIndexName());
            AbstractSearchRequest searchRequest = buildOpenSearchRequest(client, transaction);
            Render render = null;
            if (transaction.getParameterString("oe") != null)
                render = doQueryRequest(client, searchRequest, transaction.getParameterString("oe"));
            else
                render = doQueryRequest(client, searchRequest, null);
            render.render(transaction);

        } catch (Exception e) {
            throw new ServletException(e);
        }

    }

    protected Render doQueryRequest(Client client, AbstractSearchRequest searchRequest, String outputEncoding)
            throws IOException, ParseException, SyntaxError, URISyntaxException, ClassNotFoundException,
            InterruptedException, SearchLibException, InstantiationException, IllegalAccessException {

        AbstractResultSearch result = (AbstractResultSearch) client.request(searchRequest);
        return new RenderOpenSearch(result, serverURL, outputEncoding);

    }

    private AbstractSearchRequest buildOpenSearchRequest(Client client, ServletTransaction transaction)
            throws TransformerConfigurationException, SearchLibException, XPathExpressionException,
            ParserConfigurationException, SAXException, IOException {
        ApiManager apiManager = client.getApiManager();

        AbstractSearchRequest searchRequest = (AbstractSearchRequest) client
                .getNewRequest(apiManager.getFieldValue("opensearch").trim());
        searchRequest.setQueryString(transaction.getParameterString("q"));
        if (transaction.getParameterInteger("start") != null)
            searchRequest.setStart(transaction.getParameterInteger("start"));

        if (transaction.getParameterInteger("num") != null)
            searchRequest.setRows(transaction.getParameterInteger("num"));

        if (transaction.getParameterString("hl") != null)
            searchRequest.setLang(LanguageEnum.findByCode(transaction.getParameterString("hl")));

        return searchRequest;
    }

    private String getIndexName() {
        String use = null;
        if (StringUtils.substringBetween(serverURL, "search/", "/") != null)
            use = StringUtils.substringBetween(serverURL, "search/", "/");
        else
            use = StringUtils.substringBetween(serverURL, "search/", "?");
        return use;
    }

    public static StringBuilder getOpenSearchApiUrl(StringBuilder sb, String servletPathName, Client client,
            User user) throws UnsupportedEncodingException {
        String q = null;
        sb.append(servletPathName);
        sb.append("/");
        sb.append(URLEncoder.encode(client.getIndexName(), "UTF-8"));
        q = "*:*";
        sb.append("?q=");
        sb.append(URLEncoder.encode(q, "UTF-8"));
        if (user != null)
            user.appendApiCallParameters(sb);
        return sb;
    }
}