ConfigHttp.java

package org.josast.propertyHttp;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import java.util.Properties;
import java.util.logging.Logger;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClientBuilder;

/**
 * @author christophe
 *
 *         This class read a properties file from an URL.
 *
 *
 */
public class ConfigHttp {
    private static Logger log = Logger.getLogger("AmsatLogger");
    private String url = "";
    private Properties props = new Properties();
    private boolean connected = false;

    /**
     * @param url URL of the properties file to read
     */
    public ConfigHttp(final String url) {
        super();
        this.url = url;
        try {
            loadProperties();
        } catch (Exception e) {
            log.severe(e.getMessage());
        }
    }

    /**
     * Load the properties file and initialise Properties field
     */
    private void loadProperties() {

        final String USER_AGENT = "Mozilla/5.0";

        HttpClient client = HttpClientBuilder.create().build();
        HttpGet request = new HttpGet(url);
        request.addHeader("User-Agent", USER_AGENT);
        HttpResponse response;
        try {
            response = client.execute(request);

            BufferedReader rd = new BufferedReader(
                    new InputStreamReader(response.getEntity().getContent()));

            props.load(rd);
            connected = true;

        } catch (ClientProtocolException e) {
            log.severe("Error read URL");

        } catch (IOException e) {
            log.severe("Error read URL ");

        }
    }

    /**
     *
     * @param Item property name
     * @return property value, null if property not found
     */
    public String GetProperty(final String Item) {

        if (props != null) {
            String S = props.getProperty(Item);
            if (S == null) {
                return null;
            } else {
                return S.trim(); // $NON-NLS-1$
            }
        }
        return null;

    }

    /**
     * @return true if the Property file has been read
     */
    public boolean isConnected() {
        return connected;
    }

    public static void main(String[] args) {
        ConfigHttp c = new ConfigHttp(
                "http://site.amsat-f.org/download/117168/");
        System.out.println(c.GetProperty("EntrySatVersion"));
    }

}