gecko/mobile/android/base/Distribution.java

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/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* ***** BEGIN LICENSE BLOCK *****
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/.
*
* ***** END LICENSE BLOCK ***** */
package org.mozilla.gecko;
import org.mozilla.gecko.util.ThreadUtils;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.util.Log;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import org.json.JSONArray;
import org.json.JSONException;
public final class Distribution {
private static final String LOGTAG = "GeckoDistribution";
private static final int STATE_UNKNOWN = 0;
private static final int STATE_NONE = 1;
private static final int STATE_SET = 2;
/**
* Initializes distribution if it hasn't already been initalized.
*
* @param packagePath specifies where to look for the distribution directory.
*/
public static void init(final Context context, final String packagePath) {
// Read/write preferences and files on the background thread.
ThreadUtils.postToBackgroundThread(new Runnable() {
@Override
public void run() {
// Bail if we've already initialized the distribution.
SharedPreferences settings = context.getSharedPreferences(GeckoApp.PREFS_NAME, Activity.MODE_PRIVATE);
String keyName = context.getPackageName() + ".distribution_state";
int state = settings.getInt(keyName, STATE_UNKNOWN);
if (state == STATE_NONE) {
return;
}
// This pref stores the path to the distribution directory. If it is null, Gecko
// looks for distribution files in /data/data/org.mozilla.xxx/distribution.
String pathKeyName = context.getPackageName() + ".distribution_path";
String distPath = null;
// Send a message to Gecko if we've set a distribution.
if (state == STATE_SET) {
distPath = settings.getString(pathKeyName, null);
GeckoAppShell.sendEventToGecko(GeckoEvent.createBroadcastEvent("Distribution:Set", distPath));
return;
}
boolean distributionSet = false;
try {
// First, try copying distribution files out of the APK.
distributionSet = copyFiles(context, packagePath);
} catch (IOException e) {
Log.e(LOGTAG, "Error copying distribution files", e);
}
if (!distributionSet) {
// If there aren't any distribution files in the APK, look in the /system directory.
File distDir = new File("/system/" + context.getPackageName() + "/distribution");
if (distDir.exists()) {
distributionSet = true;
distPath = distDir.getPath();
settings.edit().putString(pathKeyName, distPath).commit();
}
}
if (distributionSet) {
GeckoAppShell.sendEventToGecko(GeckoEvent.createBroadcastEvent("Distribution:Set", distPath));
settings.edit().putInt(keyName, STATE_SET).commit();
} else {
settings.edit().putInt(keyName, STATE_NONE).commit();
}
}
});
}
/**
* Copies the /distribution folder out of the APK and into the app's data directory.
* Returns true if distribution files were found and copied.
*/
private static boolean copyFiles(Context context, String packagePath) throws IOException {
File applicationPackage = new File(packagePath);
ZipFile zip = new ZipFile(applicationPackage);
boolean distributionSet = false;
Enumeration<? extends ZipEntry> zipEntries = zip.entries();
while (zipEntries.hasMoreElements()) {
ZipEntry fileEntry = zipEntries.nextElement();
String name = fileEntry.getName();
if (!name.startsWith("distribution/"))
continue;
distributionSet = true;
File dataDir = new File(context.getApplicationInfo().dataDir);
File outFile = new File(dataDir, name);
File dir = outFile.getParentFile();
if (!dir.exists())
dir.mkdirs();
InputStream fileStream = zip.getInputStream(fileEntry);
OutputStream outStream = new FileOutputStream(outFile);
int b;
while ((b = fileStream.read()) != -1)
outStream.write(b);
fileStream.close();
outStream.close();
outFile.setLastModified(fileEntry.getTime());
}
zip.close();
return distributionSet;
}
/**
* Returns parsed contents of bookmarks.json.
* This method should only be called from a background thread.
*/
public static JSONArray getBookmarks(Context context) {
SharedPreferences settings = context.getSharedPreferences(GeckoApp.PREFS_NAME, Activity.MODE_PRIVATE);
String keyName = context.getPackageName() + ".distribution_state";
int state = settings.getInt(keyName, STATE_UNKNOWN);
if (state == STATE_NONE) {
return null;
}
ZipFile zip = null;
InputStream inputStream = null;
try {
if (state == STATE_UNKNOWN) {
// If the distribution hasn't been set yet, get bookmarks.json out of the APK
File applicationPackage = new File(context.getPackageResourcePath());
zip = new ZipFile(applicationPackage);
ZipEntry zipEntry = zip.getEntry("distribution/bookmarks.json");
if (zipEntry == null) {
return null;
}
inputStream = zip.getInputStream(zipEntry);
} else {
// Otherwise, get bookmarks.json out of the data directory
File dataDir = new File(context.getApplicationInfo().dataDir);
File file = new File(dataDir, "distribution/bookmarks.json");
inputStream = new FileInputStream(file);
}
// Convert input stream to JSONArray
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
StringBuilder stringBuilder = new StringBuilder();
String s;
while ((s = reader.readLine()) != null) {
stringBuilder.append(s);
}
return new JSONArray(stringBuilder.toString());
} catch (IOException e) {
Log.e(LOGTAG, "Error getting bookmarks", e);
} catch (JSONException e) {
Log.e(LOGTAG, "Error parsing bookmarks.json", e);
} finally {
try {
if (zip != null) {
zip.close();
}
if (inputStream != null) {
inputStream.close();
}
} catch (IOException e) {
Log.e(LOGTAG, "Error closing streams", e);
}
}
return null;
}
}