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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 package org.chromium.android_webview; | |
| 6 | |
| 7 import android.content.ContentResolver; | |
| 8 import android.content.Context; | |
| 9 import android.database.ContentObserver; | |
| 10 import android.database.Cursor; | |
| 11 import android.database.SQLException; | |
| 12 import android.net.Uri; | |
| 13 import android.os.AsyncTask; | |
| 14 import android.os.Handler; | |
| 15 | |
| 16 import org.chromium.base.CommandLine; | |
| 17 import org.chromium.base.Log; | |
| 18 import org.chromium.base.ThreadUtils; | |
| 19 | |
| 20 import java.lang.reflect.Field; | |
| 21 | |
| 22 /** | |
| 23 * Controls data reduction proxy. | |
| 24 */ | |
| 25 public final class AwDataReductionProxyManager { | |
| 26 // The setting Uri. Used when querying GoogleSettings. | |
| 27 // TODO: This GoogleSettings Uri does not exist yet! | |
| 28 private static final Uri CONTENT_URI = Uri.parse("content://com.google.setti
ngs/partner"); | |
| 29 | |
| 30 // Setting name for allowing data reduction proxy. Used when querying Google
Settings. | |
| 31 // Setting type: int ( 0 = disallow, 1 = allow ) | |
| 32 private static final String WEBVIEW_DATA_REDUCTION_PROXY = "use_webview_data
_reduction_proxy"; | |
| 33 | |
| 34 private static final String DRP_CLASS = "com.android.webview.chromium.Drp"; | |
| 35 private static final String TAG = "DRP"; | |
| 36 | |
| 37 // This is the same as Chromium data_reduction_proxy::switches::kEnableDataR
eductionProxy. | |
| 38 private static final String ENABLE_DATA_REDUCTION_PROXY = "enable-spdy-proxy
-auth"; | |
| 39 // This is the same as Chromium data_reduction_proxy::switches::kDataReducti
onProxyKey. | |
| 40 private static final String DATA_REDUCTION_PROXY_KEY = "spdy-proxy-auth-valu
e"; | |
| 41 | |
| 42 private ContentObserver mProxySettingObserver; | |
| 43 | |
| 44 public AwDataReductionProxyManager() {} | |
| 45 | |
| 46 public void start(final Context context) { | |
| 47 // This is the DRP key embedded in WebView apk. | |
| 48 final String embeddedKey = readKey(); | |
| 49 | |
| 50 // Developers could test DRP by passing ENABLE_DATA_REDUCTION_PROXY and
(optionally) | |
| 51 // DATA_REDUCTION_PROXY_KEY to the commandline switches. In this case,
we will try to | |
| 52 // initialize DRP from commandline. And ignore user's preference. If | |
| 53 // DATA_REDUCTION_PROXY_KEY is specified in commandline, use it. Otherw
ise, use the key | |
| 54 // embedded in WebView apk. | |
| 55 CommandLine cl = CommandLine.getInstance(); | |
| 56 if (cl.hasSwitch(ENABLE_DATA_REDUCTION_PROXY)) { | |
| 57 String key = cl.getSwitchValue(DATA_REDUCTION_PROXY_KEY, embeddedKey
); | |
| 58 if (key == null || key.isEmpty()) { | |
| 59 return; | |
| 60 } | |
| 61 | |
| 62 // Now we will enable DRP because we've got a commandline switch to
enable it. | |
| 63 // We won't listen to Google Settings preference change because comm
andline switches | |
| 64 // trump that. | |
| 65 AwContentsStatics.setDataReductionProxyKey(key); | |
| 66 AwContentsStatics.setDataReductionProxyEnabled(true); | |
| 67 return; | |
| 68 } | |
| 69 | |
| 70 // Now, there is no commandline switches to enable DRP, and reading the | |
| 71 // DRP key from WebView apk failed. Just return and leave DRP disabled. | |
| 72 if (embeddedKey == null || embeddedKey.isEmpty()) { | |
| 73 return; | |
| 74 } | |
| 75 | |
| 76 applyDataReductionProxySettingsAsync(context, embeddedKey); | |
| 77 ContentResolver resolver = context.getContentResolver(); | |
| 78 mProxySettingObserver = new ContentObserver(new Handler()) { | |
| 79 @Override | |
| 80 public void onChange(boolean selfChange, Uri uri) { | |
| 81 applyDataReductionProxySettingsAsync(context, embeddedKey); | |
| 82 } | |
| 83 }; | |
| 84 resolver.registerContentObserver( | |
| 85 Uri.withAppendedPath(CONTENT_URI, WEBVIEW_DATA_REDUCTION_PROXY),
false, | |
| 86 mProxySettingObserver); | |
| 87 } | |
| 88 | |
| 89 private String readKey() { | |
| 90 try { | |
| 91 Class<?> cls = Class.forName(DRP_CLASS); | |
| 92 Field f = cls.getField("KEY"); | |
| 93 return (String) f.get(null); | |
| 94 } catch (ClassNotFoundException ex) { | |
| 95 // Class not found is a normal case, simply log. | |
| 96 Log.i(TAG, "No DRP key due to exception:" + ex); | |
| 97 } catch (NoSuchFieldException ex) { | |
| 98 Log.e(TAG, "No DRP key due to exception:" + ex); | |
| 99 } catch (SecurityException ex) { | |
| 100 Log.e(TAG, "No DRP key due to exception:" + ex); | |
| 101 } catch (IllegalArgumentException ex) { | |
| 102 Log.e(TAG, "No DRP key due to exception:" + ex); | |
| 103 } catch (IllegalAccessException ex) { | |
| 104 Log.e(TAG, "No DRP key due to exception:" + ex); | |
| 105 } catch (NullPointerException ex) { | |
| 106 Log.e(TAG, "No DRP key due to exception:" + ex); | |
| 107 } | |
| 108 return null; | |
| 109 } | |
| 110 | |
| 111 private static void applyDataReductionProxySettingsAsync( | |
| 112 final Context context, final String key) { | |
| 113 AsyncTask.THREAD_POOL_EXECUTOR.execute(new Runnable() { | |
| 114 @Override | |
| 115 public void run() { | |
| 116 final boolean enabled = isDataReductionProxyEnabled(context); | |
| 117 | |
| 118 ThreadUtils.runOnUiThread(new Runnable() { | |
| 119 @Override | |
| 120 public void run() { | |
| 121 if (enabled) { | |
| 122 // Set the data reduction proxy key. | |
| 123 AwContentsStatics.setDataReductionProxyKey(key); | |
| 124 } | |
| 125 AwContentsStatics.setDataReductionProxyEnabled(enabled); | |
| 126 } | |
| 127 }); | |
| 128 } | |
| 129 }); | |
| 130 } | |
| 131 | |
| 132 private static boolean isDataReductionProxyEnabled(Context context) { | |
| 133 return getProxySetting(context.getContentResolver(), WEBVIEW_DATA_REDUCT
ION_PROXY) != 0; | |
| 134 } | |
| 135 | |
| 136 // Read query setting from GoogleSettings. | |
| 137 private static int getProxySetting(ContentResolver resolver, String name) { | |
| 138 String value = null; | |
| 139 Cursor c = null; | |
| 140 try { | |
| 141 c = resolver.query( | |
| 142 CONTENT_URI, new String[] {"value"}, "name=?", new String[]
{name}, null); | |
| 143 if (c != null && c.moveToNext()) value = c.getString(0); | |
| 144 } catch (SQLException e) { | |
| 145 // SQL error: return null, but don't cache it. | |
| 146 Log.e(TAG, "Can't get key " + name + " from " + CONTENT_URI, e); | |
| 147 } finally { | |
| 148 if (c != null) c.close(); | |
| 149 } | |
| 150 int enabled = 0; | |
| 151 try { | |
| 152 if (value != null) { | |
| 153 enabled = Integer.parseInt(value); | |
| 154 } | |
| 155 } catch (NumberFormatException e) { | |
| 156 Log.e(TAG, "cannot parse" + value, e); | |
| 157 } | |
| 158 return enabled; | |
| 159 } | |
| 160 } | |
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Chromium Code Reviews
Issue 2101153003:
Remove data reduction proxy code. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master