org.labcrypto.wideroid.helpers.DownloadHelper.java Source code

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Here is the source code for org.labcrypto.wideroid.helpers.DownloadHelper.java

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/**
    
 Wideroid Android Helper Framework
 Copyright 2015 Kamran Amini
    
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
    
 http://www.apache.org/licenses/LICENSE-2.0
    
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
    
 */

package org.labcrypto.wideroid.helpers;

import android.net.http.AndroidHttpClient;
import android.os.AsyncTask;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.util.EntityUtils;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

/**
 * TODO
 *
 * @author Kamran Amini  <kam.cpp@gmail.com>
 */
public class DownloadHelper {

    public interface DataDownloadFinishListener {
        void downloadFinished(byte[] data);
    }

    public interface StringDownloadFinishedListener {
        void stringDownloadFinished(String data);
    }

    public interface FileDownloadFinishedListener {
        void fileDownloadFinished(String path);
    }

    public byte[] downloadAsByteArray(final String url) throws IOException {
        try {
            AsyncTask<Void, Void, byte[]> asyncTask = new AsyncTask<Void, Void, byte[]>() {
                @Override
                protected byte[] doInBackground(Void... params) {
                    HttpGet httpGet = null;
                    try {
                        HttpClient httpClient = AndroidHttpClient.newInstance("");
                        httpGet = new HttpGet(url);
                        HttpResponse httpResponse = httpClient.execute(httpGet);
                        if (httpResponse.getStatusLine().getStatusCode() != 200) {
                            return null;
                        }
                        return EntityUtils.toByteArray(httpResponse.getEntity());
                    } catch (Exception e) {
                        e.printStackTrace();
                        throw new RuntimeException(e);
                    } finally {
                        try {
                            if (httpGet != null) {
                                httpGet.abort();
                            }
                        } catch (Exception e) {
                        }
                    }
                }
            };
            asyncTask.execute(new Void[] {});
            return asyncTask.get();
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException(e);
        }
    }

    public void downloadAsByteArrayAsync(final String url,
            final DataDownloadFinishListener dataDownloadFinishListener) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    byte[] data = downloadAsByteArray(url);
                    if (dataDownloadFinishListener != null) {
                        dataDownloadFinishListener.downloadFinished(data);
                    }
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
        }).start();
    }

    public String downloadAsString(final String url, String charSet) throws IOException {
        return new String(downloadAsByteArray(url), charSet);
    }

    public void downloadAsStringAsync(final String url, final String charSet,
            final StringDownloadFinishedListener stringDownloadFinishedListener) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    String string = downloadAsString(url, charSet);
                    if (stringDownloadFinishedListener != null) {
                        stringDownloadFinishedListener.stringDownloadFinished(string);
                    }
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
        }).start();
    }

    public void downloadToFile(String url, String filePath) throws IOException {
        byte[] responseByteArray = downloadAsByteArray(url);
        OutputStream outputStream = new FileOutputStream(filePath);
        outputStream.write(responseByteArray);
        outputStream.close();
    }

    public void downloadToFileAsync(final String url, final String filePath,
            final FileDownloadFinishedListener fileDownloadFinishedListener) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    downloadToFile(url, filePath);
                    if (fileDownloadFinishedListener != null) {
                        fileDownloadFinishedListener.fileDownloadFinished(filePath);
                    }
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
        }).start();
    }
}