com.jaeksoft.searchlib.crawler.web.spider.ProxyHandler.java Source code

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Here is the source code for com.jaeksoft.searchlib.crawler.web.spider.ProxyHandler.java

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/**   
 * License Agreement for OpenSearchServer
 *
 * Copyright (C) 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.crawler.web.spider;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.StringReader;
import java.net.URI;
import java.util.Set;
import java.util.TreeSet;

import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.config.RequestConfig;

import com.jaeksoft.searchlib.SearchLibException;
import com.jaeksoft.searchlib.crawler.web.database.WebPropertyManager;
import com.jaeksoft.searchlib.util.IOUtils;

public class ProxyHandler {

    final private HttpHost proxy;

    final private Set<String> exclusionSet;

    final private String username;

    final private String password;

    public ProxyHandler(WebPropertyManager webPropertyManager) throws SearchLibException {
        if (!webPropertyManager.getProxyEnabled().getValue()) {
            proxy = null;
            exclusionSet = null;
            username = null;
            password = null;
            return;
        }
        String proxyHost = webPropertyManager.getProxyHost().getValue();
        int proxyPort = webPropertyManager.getProxyPort().getValue();
        if (proxyHost == null || proxyHost.trim().length() == 0 || proxyPort == 0) {
            proxy = null;
            exclusionSet = null;
            username = null;
            password = null;
            return;
        }
        username = webPropertyManager.getProxyUsername().getValue();
        password = webPropertyManager.getProxyPassword().getValue();
        proxy = new HttpHost(proxyHost, proxyPort, "http");
        exclusionSet = new TreeSet<String>();
        String line;
        StringReader sr = null;
        BufferedReader br = null;
        try {
            sr = new StringReader(webPropertyManager.getProxyExclusion().getValue());
            br = new BufferedReader(sr);
            while ((line = br.readLine()) != null) {
                line = line.trim();
                if (line.length() > 0)
                    exclusionSet.add(line);
            }
        } catch (IOException e) {
            throw new SearchLibException(e);
        } finally {
            IOUtils.close(br, sr);
        }
    }

    public void check(RequestConfig.Builder configBuilder, URI uri, CredentialsProvider credentialsProvider) {
        if (proxy == null || uri == null)
            return;
        if (exclusionSet.contains(uri.getHost()))
            return;
        configBuilder.setProxy(proxy);
        if (!StringUtils.isEmpty(username))
            credentialsProvider.setCredentials(new AuthScope(proxy),
                    new UsernamePasswordCredentials(username, password));
    }

}