1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/mobile/android/base/util/GeckoJarReader.java Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,177 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.6 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +package org.mozilla.gecko.util;
1.9 +
1.10 +import org.mozilla.gecko.mozglue.NativeZip;
1.11 +
1.12 +import android.content.res.Resources;
1.13 +import android.graphics.Bitmap;
1.14 +import android.graphics.drawable.BitmapDrawable;
1.15 +import android.util.Log;
1.16 +import org.mozilla.gecko.mozglue.RobocopTarget;
1.17 +
1.18 +import java.io.BufferedReader;
1.19 +import java.io.IOException;
1.20 +import java.io.InputStream;
1.21 +import java.io.InputStreamReader;
1.22 +import java.net.URI;
1.23 +import java.net.URISyntaxException;
1.24 +import java.util.Stack;
1.25 +
1.26 +/* Reads out of a multiple level deep jar file such as
1.27 + * jar:jar:file:///data/app/org.mozilla.fennec.apk!/omni.ja!/chrome/chrome/content/branding/favicon32.png
1.28 + */
1.29 +public final class GeckoJarReader {
1.30 + private static final String LOGTAG = "GeckoJarReader";
1.31 +
1.32 + private GeckoJarReader() {}
1.33 +
1.34 + public static Bitmap getBitmap(Resources resources, String url) {
1.35 + BitmapDrawable drawable = getBitmapDrawable(resources, url);
1.36 + return (drawable != null) ? drawable.getBitmap() : null;
1.37 + }
1.38 +
1.39 + public static BitmapDrawable getBitmapDrawable(Resources resources, String url) {
1.40 + Stack<String> jarUrls = parseUrl(url);
1.41 + InputStream inputStream = null;
1.42 + BitmapDrawable bitmap = null;
1.43 +
1.44 + NativeZip zip = null;
1.45 + try {
1.46 + // Load the initial jar file as a zip
1.47 + zip = getZipFile(jarUrls.pop());
1.48 + inputStream = getStream(zip, jarUrls, url);
1.49 + if (inputStream != null) {
1.50 + bitmap = new BitmapDrawable(resources, inputStream);
1.51 + }
1.52 + } catch (IOException ex) {
1.53 + Log.e(LOGTAG, "Exception ", ex);
1.54 + } catch (URISyntaxException ex) {
1.55 + Log.e(LOGTAG, "Exception ", ex);
1.56 + } finally {
1.57 + if (inputStream != null) {
1.58 + try {
1.59 + inputStream.close();
1.60 + } catch(IOException ex) {
1.61 + Log.e(LOGTAG, "Error closing stream", ex);
1.62 + }
1.63 + }
1.64 + if (zip != null) {
1.65 + zip.close();
1.66 + }
1.67 + }
1.68 +
1.69 + return bitmap;
1.70 + }
1.71 +
1.72 + public static String getText(String url) {
1.73 + Stack<String> jarUrls = parseUrl(url);
1.74 +
1.75 + NativeZip zip = null;
1.76 + BufferedReader reader = null;
1.77 + String text = null;
1.78 + try {
1.79 + zip = getZipFile(jarUrls.pop());
1.80 + InputStream input = getStream(zip, jarUrls, url);
1.81 + if (input != null) {
1.82 + reader = new BufferedReader(new InputStreamReader(input));
1.83 + text = reader.readLine();
1.84 + }
1.85 + } catch (IOException ex) {
1.86 + Log.e(LOGTAG, "Exception ", ex);
1.87 + } catch (URISyntaxException ex) {
1.88 + Log.e(LOGTAG, "Exception ", ex);
1.89 + } finally {
1.90 + if (reader != null) {
1.91 + try {
1.92 + reader.close();
1.93 + } catch(IOException ex) {
1.94 + Log.e(LOGTAG, "Error closing reader", ex);
1.95 + }
1.96 + }
1.97 + if (zip != null) {
1.98 + zip.close();
1.99 + }
1.100 + }
1.101 +
1.102 + return text;
1.103 + }
1.104 +
1.105 + private static NativeZip getZipFile(String url) throws IOException, URISyntaxException {
1.106 + URI fileUrl = new URI(url);
1.107 + return new NativeZip(fileUrl.getPath());
1.108 + }
1.109 +
1.110 + @RobocopTarget
1.111 + public static InputStream getStream(String url) {
1.112 + Stack<String> jarUrls = parseUrl(url);
1.113 + try {
1.114 + NativeZip zip = getZipFile(jarUrls.pop());
1.115 + return getStream(zip, jarUrls, url);
1.116 + } catch (Exception ex) {
1.117 + // Some JNI code throws IllegalArgumentException on a bad file name;
1.118 + // swallow the error and return null. We could also see legitimate
1.119 + // IOExceptions here.
1.120 + return null;
1.121 + }
1.122 + }
1.123 +
1.124 + private static InputStream getStream(NativeZip zip, Stack<String> jarUrls, String origUrl) {
1.125 + InputStream inputStream = null;
1.126 +
1.127 + // loop through children jar files until we reach the innermost one
1.128 + while (!jarUrls.empty()) {
1.129 + String fileName = jarUrls.pop();
1.130 +
1.131 + if (inputStream != null) {
1.132 + // intermediate NativeZips and InputStreams will be garbage collected.
1.133 + try {
1.134 + zip = new NativeZip(inputStream);
1.135 + } catch (IllegalArgumentException e) {
1.136 + String description = "!!! BUG 849589 !!! origUrl=" + origUrl;
1.137 + Log.e(LOGTAG, description, e);
1.138 + throw new IllegalArgumentException(description);
1.139 + }
1.140 + }
1.141 +
1.142 + inputStream = zip.getInputStream(fileName);
1.143 + if (inputStream == null) {
1.144 + Log.d(LOGTAG, "No Entry for " + fileName);
1.145 + return null;
1.146 + }
1.147 + }
1.148 +
1.149 + return inputStream;
1.150 + }
1.151 +
1.152 + /* Returns a stack of strings breaking the url up into pieces. Each piece
1.153 + * is assumed to point to a jar file except for the final one. Callers should
1.154 + * pass in the url to parse, and null for the parent parameter (used for recursion)
1.155 + * For example, jar:jar:file:///data/app/org.mozilla.fennec.apk!/omni.ja!/chrome/chrome/content/branding/favicon32.png
1.156 + * will return:
1.157 + * file:///data/app/org.mozilla.fennec.apk
1.158 + * omni.ja
1.159 + * chrome/chrome/content/branding/favicon32.png
1.160 + */
1.161 + private static Stack<String> parseUrl(String url) {
1.162 + return parseUrl(url, null);
1.163 + }
1.164 +
1.165 + private static Stack<String> parseUrl(String url, Stack<String> results) {
1.166 + if (results == null) {
1.167 + results = new Stack<String>();
1.168 + }
1.169 +
1.170 + if (url.startsWith("jar:")) {
1.171 + int jarEnd = url.lastIndexOf("!");
1.172 + String subStr = url.substring(4, jarEnd);
1.173 + results.push(url.substring(jarEnd+2)); // remove the !/ characters
1.174 + return parseUrl(subStr, results);
1.175 + } else {
1.176 + results.push(url);
1.177 + return results;
1.178 + }
1.179 + }
1.180 +}
