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/**
* Copyright (c) 2020 LEAP Encryption Access Project and contributers
*
* 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 se.leap.bitmaskclient.appUpdate;
import android.util.Log;
import android.util.Pair;
import androidx.annotation.NonNull;
import java.io.File;
import java.io.InputStream;
import java.util.List;
import java.util.Scanner;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.ResponseBody;
import okio.Buffer;
import okio.BufferedSink;
import okio.BufferedSource;
import okio.Okio;
/**
* This class encapsulates HTTP requests so that the results can be mocked
* and it's owning UpdateDownloadManager class logic can be unit tested properly
*
*/
public class DownloadConnector {
private static final String TAG = DownloadConnector.class.getSimpleName();
public final static String APP_TYPE = "application/vnd.android.package-archive";
public final static String TEXT_FILE_TYPE = "application/text";
public interface DownloadProgress {
void onUpdate(int progress);
}
static String requestTextFileFromServer(@NonNull String url, @NonNull OkHttpClient okHttpClient) {
try {
Request request = new Request.Builder()
.url(url)
.addHeader("Content-Type", TEXT_FILE_TYPE)
.build();
Response response = okHttpClient.newCall(request).execute();
if (!response.isSuccessful()) {
return null;
}
InputStream inputStream = response.body().byteStream();
Scanner scanner = new Scanner(inputStream).useDelimiter("\\A");
if (scanner.hasNext()) {
return scanner.next();
}
return null;
} catch (Exception e) {
Log.d(TAG, "Text file download failed");
}
return null;
}
static File requestFileFromServer(@NonNull String url, @NonNull OkHttpClient okHttpClient, File destFile, DownloadProgress callback) {
BufferedSink sink;
BufferedSource source;
try {
Request.Builder requestBuilder = new Request.Builder()
.url(url)
.addHeader("Content-Type", APP_TYPE);
Request request = requestBuilder.build();
Response response = okHttpClient.newCall(request).execute();
ResponseBody body = response.body();
long contentLength = body.contentLength();
source = body.source();
sink = Okio.buffer(Okio.sink(destFile));
Buffer sinkBuffer = sink.buffer();
long totalBytesRead = 0;
int bufferSize = 8 * 1024;
long bytesRead;
int lastProgress = 0;
while ((bytesRead = source.read(sinkBuffer, bufferSize)) != -1) {
sink.emit();
totalBytesRead += bytesRead;
int progress = (int) ((totalBytesRead * 100) / contentLength);
// debouncing callbacks
if (lastProgress < progress) {
lastProgress = progress;
callback.onUpdate(progress);
}
}
sink.flush();
return destFile;
} catch (Exception e) {
Log.d(TAG, "File download failed");
}
return null;
}
}
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