Android Open Source - tazDownloader Taz Downloader

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License

The source code is released under:

GNU General Public License

Java Source Code

/*******************************************************************************
 * Copyright (c) 2012 Olaf Sebelin.//  w  w  w  .  j  ava2  s  .  co m
 * 
 * This program 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.
 * 
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package read.taz;

import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;

import org.apache.http.Header;
import org.apache.http.HttpResponse;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.Credentials;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;

import android.util.Log;

public class TazDownloader implements Runnable {

  private final TazFile tazFile;

  private final String uname;

  private final String passwd;

  private TazDownloadListener listener;

  public TazDownloader(TazFile tazFile, String uname, String passwd,
      TazDownloadListener listener) {
    super();
    this.tazFile = tazFile;
    this.uname = uname;
    this.passwd = passwd;
    this.listener = listener;
  }

  @Override
  public void run() {
    try {
      downloadFile();
      listener.success(tazFile);
    } catch (Exception e) {
      Log.e(getClass().getSimpleName(), "Cannot download taz", e);
      listener.error(tazFile, e);
    }
  }

  private void downloadFile() throws ClientProtocolException, IOException {
    if (tazFile.file.exists()) {
      Log.w(getClass().getSimpleName(), "File " + tazFile + " exists.");
      return;
    }
    HttpParams httpParams = new BasicHttpParams();
    HttpConnectionParams.setConnectionTimeout(httpParams, 30000);
    HttpConnectionParams.setSoTimeout(httpParams, 15000);

    DefaultHttpClient client = new DefaultHttpClient(httpParams);

    Credentials defaultcreds = new UsernamePasswordCredentials(uname, passwd);

    client.getCredentialsProvider().setCredentials(
        new AuthScope(/* FIXME DRY */"dl.taz.de", 80, AuthScope.ANY_REALM),
        defaultcreds);

    URI uri = tazFile.getDownloadURI();
    Log.d(getClass().getSimpleName(), "Downloading taz from " + uri);
    HttpGet get = new HttpGet(uri);
    HttpResponse response = client.execute(get);
    if (response.getStatusLine().getStatusCode() != 200) {
      throw new IOException("Download failed with HTTP Error"
          + response.getStatusLine().getStatusCode());
    }

    String contentType = response.getEntity().getContentType().getValue();
    if (contentType.startsWith("text/html")) {
      Log.d(getClass().getSimpleName(), "Content type: " + contentType
          + " encountered. Assuming a non exisiting file");

      ByteArrayOutputStream htmlOut = new ByteArrayOutputStream();
      response.getEntity().writeTo(htmlOut);
      String resp = new String(htmlOut.toByteArray());
      Log.d(getClass().getSimpleName(), "Response: " + resp);
      throw new FileNotFoundException("No taz found for date "
          + tazFile.date.getTime());
    } else {
      FileOutputStream tazOut = new FileOutputStream(tazFile.file);
      try {
        response.getEntity().writeTo(tazOut);
      } finally {
        tazOut.close();
      }
    }

    // InputStream docStream = response.getEntity().getContent();
    // FileOutputStream out = null;
    // try {
    // out = tazOut;
    // byte[] buf = new byte[4096];
    // for (int read = docStream.read(buf); read != -1; read = docStream
    // .read(buf)) {
    // out.write(buf, 0, read);
    // }
    // } finally {
    // docStream.close();
    // if (out != null) {
    // out.close();
    // }
    // }

  }
}

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