net.rptools.maptool.client.WebDownloader.java Source code

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Here is the source code for net.rptools.maptool.client.WebDownloader.java

Source

/*
 * This software copyright by various authors including the RPTools.net
 * development team, and licensed under the LGPL Version 3 or, at your option,
 * any later version.
 *
 * Portions of this software were originally covered under the Apache Software
 * License, Version 1.1 or Version 2.0.
 *
 * See the file LICENSE elsewhere in this distribution for license details.
 */

package net.rptools.maptool.client;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

import org.apache.commons.io.IOUtils;

public class WebDownloader {
    private final URL url;

    public WebDownloader(URL url) {
        if (url == null) {
            throw new IllegalArgumentException("URL cannot be null");
        }
        this.url = url;
    }

    /**
     * Read the data at the given URL. This method should not be called on the EDT.
     * 
     * @return File pointer to the location of the data, file will be deleted at program end
     */
    public String read() throws IOException {
        URLConnection conn = url.openConnection();

        conn.setConnectTimeout(5000);
        conn.setReadTimeout(5000);

        // Send the request.
        conn.connect();

        InputStream in = null;
        ByteArrayOutputStream out = null;
        try {
            in = conn.getInputStream();
            out = new ByteArrayOutputStream();

            int buflen = 1024 * 30;
            int bytesRead = 0;
            byte[] buf = new byte[buflen];

            for (int nRead = in.read(buf); nRead != -1; nRead = in.read(buf)) {
                bytesRead += nRead;
                out.write(buf, 0, nRead);
            }
        } finally {
            IOUtils.closeQuietly(in);
            IOUtils.closeQuietly(out);
        }
        return out != null ? new String(out.toByteArray()) : null;
    }

    public static void main(String[] args) throws Exception {
        WebDownloader downloader = new WebDownloader(new URL("http://library.rptools.net/1.3/listArtPacks"));
        String result = downloader.read();
        System.out.println(result);
    }
}