it.evilsocket.dsploit.net.GemParser.java Source code

Introduction

Here is the source code for it.evilsocket.dsploit.net.GemParser.java

Source

/*
 * This file is part of the dSploit.
 *
 * Copyleft of Simone Margaritelli aka evilsocket <evilsocket@gmail.com>
 *             Massimo Dragano aka tux_mind <massimo.dragano@gmail.com>
 *
 * dSploit 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.
 *
 * dSploit 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 dSploit.  If not, see <http://www.gnu.org/licenses/>.
 */

package it.evilsocket.dsploit.net;

import org.joda.time.DateTime;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Date;

/**
 * This class parses JSON containing modification time of uploaded gems
 */
public class GemParser {

    /**
     * class that holds info about remote gem
     */
    public static class RemoteGemInfo {
        public final String name;
        public final String version;
        public final Date uploaded;

        private RemoteGemInfo(String name, String version, Date uploaded) {
            this.name = name;
            this.version = version;
            this.uploaded = uploaded;
        }
    }

    private final String mUrl;
    private RemoteGemInfo[] mGems = null;
    private RemoteGemInfo[] mOldGems = null;

    public GemParser(String url) {
        mUrl = url;
    }

    private void fetch() throws JSONException, IOException {
        HttpURLConnection connection = null;
        BufferedReader reader = null;

        try {
            HttpURLConnection.setFollowRedirects(true);
            connection = (HttpURLConnection) (new URL(mUrl)).openConnection();
            connection.connect();
            int ret = connection.getResponseCode();
            if (ret != 200)
                throw new IOException("cannot retrieve remote json: " + ret);
            reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            StringBuilder sb = new StringBuilder();
            String line;

            while ((line = reader.readLine()) != null)
                sb.append(line);
            JSONArray jGems = new JSONArray(sb.toString());
            mGems = new RemoteGemInfo[jGems.length()];
            for (int i = 0; i < jGems.length(); i++) {
                JSONObject gem = jGems.getJSONObject(i);
                mGems[i] = new RemoteGemInfo(gem.getString("name"), gem.getString("version"),
                        (new DateTime(gem.getString("uploaded"))).toDate());
            }
        } finally {
            if (reader != null)
                reader.close();
            if (connection != null)
                connection.disconnect();
        }
    }

    public RemoteGemInfo[] parse() throws IOException, JSONException {
        if (mGems == null)
            fetch();
        return mGems;
    }

    public void setOldGems(RemoteGemInfo[] oldGems) {
        mOldGems = oldGems;
    }

    public RemoteGemInfo[] getGemsToUpdate() {
        return mOldGems;
    }

    public void reset() {
        mGems = null;
        mOldGems = null;
    }
}