The Tor Browser / file comparison

comparison: mobile/android/base/util/GeckoJarReader.java

mobile/android/base/util/GeckoJarReader.java

branch
TOR_BUG_9701
changeset 15
b8a032363ba2
equal deleted inserted replaced
-1:000000000000 0:d700b15ed04b
1 /* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
3 * You can obtain one at http://mozilla.org/MPL/2.0/. */
4
5 package org.mozilla.gecko.util;
6
7 import org.mozilla.gecko.mozglue.NativeZip;
8
9 import android.content.res.Resources;
10 import android.graphics.Bitmap;
11 import android.graphics.drawable.BitmapDrawable;
12 import android.util.Log;
13 import org.mozilla.gecko.mozglue.RobocopTarget;
14
15 import java.io.BufferedReader;
16 import java.io.IOException;
17 import java.io.InputStream;
18 import java.io.InputStreamReader;
19 import java.net.URI;
20 import java.net.URISyntaxException;
21 import java.util.Stack;
22
23 /* Reads out of a multiple level deep jar file such as
24 * jar:jar:file:///data/app/org.mozilla.fennec.apk!/omni.ja!/chrome/chrome/content/branding/favicon32.png
25 */
26 public final class GeckoJarReader {
27 private static final String LOGTAG = "GeckoJarReader";
28
29 private GeckoJarReader() {}
30
31 public static Bitmap getBitmap(Resources resources, String url) {
32 BitmapDrawable drawable = getBitmapDrawable(resources, url);
33 return (drawable != null) ? drawable.getBitmap() : null;
34 }
35
36 public static BitmapDrawable getBitmapDrawable(Resources resources, String url) {
37 Stack<String> jarUrls = parseUrl(url);
38 InputStream inputStream = null;
39 BitmapDrawable bitmap = null;
40
41 NativeZip zip = null;
42 try {
43 // Load the initial jar file as a zip
44 zip = getZipFile(jarUrls.pop());
45 inputStream = getStream(zip, jarUrls, url);
46 if (inputStream != null) {
47 bitmap = new BitmapDrawable(resources, inputStream);
48 }
49 } catch (IOException ex) {
50 Log.e(LOGTAG, "Exception ", ex);
51 } catch (URISyntaxException ex) {
52 Log.e(LOGTAG, "Exception ", ex);
53 } finally {
54 if (inputStream != null) {
55 try {
56 inputStream.close();
57 } catch(IOException ex) {
58 Log.e(LOGTAG, "Error closing stream", ex);
59 }
60 }
61 if (zip != null) {
62 zip.close();
63 }
64 }
65
66 return bitmap;
67 }
68
69 public static String getText(String url) {
70 Stack<String> jarUrls = parseUrl(url);
71
72 NativeZip zip = null;
73 BufferedReader reader = null;
74 String text = null;
75 try {
76 zip = getZipFile(jarUrls.pop());
77 InputStream input = getStream(zip, jarUrls, url);
78 if (input != null) {
79 reader = new BufferedReader(new InputStreamReader(input));
80 text = reader.readLine();
81 }
82 } catch (IOException ex) {
83 Log.e(LOGTAG, "Exception ", ex);
84 } catch (URISyntaxException ex) {
85 Log.e(LOGTAG, "Exception ", ex);
86 } finally {
87 if (reader != null) {
88 try {
89 reader.close();
90 } catch(IOException ex) {
91 Log.e(LOGTAG, "Error closing reader", ex);
92 }
93 }
94 if (zip != null) {
95 zip.close();
96 }
97 }
98
99 return text;
100 }
101
102 private static NativeZip getZipFile(String url) throws IOException, URISyntaxException {
103 URI fileUrl = new URI(url);
104 return new NativeZip(fileUrl.getPath());
105 }
106
107 @RobocopTarget
108 public static InputStream getStream(String url) {
109 Stack<String> jarUrls = parseUrl(url);
110 try {
111 NativeZip zip = getZipFile(jarUrls.pop());
112 return getStream(zip, jarUrls, url);
113 } catch (Exception ex) {
114 // Some JNI code throws IllegalArgumentException on a bad file name;
115 // swallow the error and return null. We could also see legitimate
116 // IOExceptions here.
117 return null;
118 }
119 }
120
121 private static InputStream getStream(NativeZip zip, Stack<String> jarUrls, String origUrl) {
122 InputStream inputStream = null;
123
124 // loop through children jar files until we reach the innermost one
125 while (!jarUrls.empty()) {
126 String fileName = jarUrls.pop();
127
128 if (inputStream != null) {
129 // intermediate NativeZips and InputStreams will be garbage collected.
130 try {
131 zip = new NativeZip(inputStream);
132 } catch (IllegalArgumentException e) {
133 String description = "!!! BUG 849589 !!! origUrl=" + origUrl;
134 Log.e(LOGTAG, description, e);
135 throw new IllegalArgumentException(description);
136 }
137 }
138
139 inputStream = zip.getInputStream(fileName);
140 if (inputStream == null) {
141 Log.d(LOGTAG, "No Entry for " + fileName);
142 return null;
143 }
144 }
145
146 return inputStream;
147 }
148
149 /* Returns a stack of strings breaking the url up into pieces. Each piece
150 * is assumed to point to a jar file except for the final one. Callers should
151 * pass in the url to parse, and null for the parent parameter (used for recursion)
152 * For example, jar:jar:file:///data/app/org.mozilla.fennec.apk!/omni.ja!/chrome/chrome/content/branding/favicon32.png
153 * will return:
154 * file:///data/app/org.mozilla.fennec.apk
155 * omni.ja
156 * chrome/chrome/content/branding/favicon32.png
157 */
158 private static Stack<String> parseUrl(String url) {
159 return parseUrl(url, null);
160 }
161
162 private static Stack<String> parseUrl(String url, Stack<String> results) {
163 if (results == null) {
164 results = new Stack<String>();
165 }
166
167 if (url.startsWith("jar:")) {
168 int jarEnd = url.lastIndexOf("!");
169 String subStr = url.substring(4, jarEnd);
170 results.push(url.substring(jarEnd+2)); // remove the !/ characters
171 return parseUrl(subStr, results);
172 } else {
173 results.push(url);
174 return results;
175 }
176 }
177 }

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