1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.providers.downloads; 18 19 import android.os.Build; 20 import android.os.Environment; 21 import android.text.TextUtils; 22 import android.util.Log; 23 24 /** 25 * Contains the internal constants that are used in the download manager. 26 * As a general rule, modifying these constants should be done with care. 27 */ 28 public class Constants { 29 30 /** Tag used for debugging/logging */ 31 public static final String TAG = "DownloadManager"; 32 33 /** The column that used to be used for the HTTP method of the request */ 34 public static final String RETRY_AFTER_X_REDIRECT_COUNT = "method"; 35 36 /** The column that used to be used for the magic OTA update filename */ 37 public static final String OTA_UPDATE = "otaupdate"; 38 39 /** The column that used to be used to reject system filetypes */ 40 public static final String NO_SYSTEM_FILES = "no_system"; 41 42 /** The column that is used for the downloads's ETag */ 43 public static final String ETAG = "etag"; 44 45 /** The column that is used for the initiating app's UID */ 46 public static final String UID = "uid"; 47 48 /** The column that is used to remember whether the media scanner was invoked */ 49 public static final String MEDIA_SCANNED = "scanned"; 50 51 /** The intent that gets sent when the service must wake up for a retry */ 52 public static final String ACTION_RETRY = "android.intent.action.DOWNLOAD_WAKEUP"; 53 54 /** the intent that gets sent when clicking a successful download */ 55 public static final String ACTION_OPEN = "android.intent.action.DOWNLOAD_OPEN"; 56 57 /** the intent that gets sent when clicking an incomplete/failed download */ 58 public static final String ACTION_LIST = "android.intent.action.DOWNLOAD_LIST"; 59 60 /** the intent that gets sent when deleting the notification of a completed download */ 61 public static final String ACTION_HIDE = "android.intent.action.DOWNLOAD_HIDE"; 62 63 /** The default base name for downloaded files if we can't get one at the HTTP level */ 64 public static final String DEFAULT_DL_FILENAME = "downloadfile"; 65 66 /** The default extension for html files if we can't get one at the HTTP level */ 67 public static final String DEFAULT_DL_HTML_EXTENSION = ".html"; 68 69 /** The default extension for text files if we can't get one at the HTTP level */ 70 public static final String DEFAULT_DL_TEXT_EXTENSION = ".txt"; 71 72 /** The default extension for binary files if we can't get one at the HTTP level */ 73 public static final String DEFAULT_DL_BINARY_EXTENSION = ".bin"; 74 75 public static final String PROVIDER_PACKAGE_NAME = "com.android.providers.downloads"; 76 77 /** 78 * When a number has to be appended to the filename, this string is used to separate the 79 * base filename from the sequence number 80 */ 81 public static final String FILENAME_SEQUENCE_SEPARATOR = "-"; 82 83 /** Where we store downloaded files on the external storage */ 84 public static final String DEFAULT_DL_SUBDIR = "/" + Environment.DIRECTORY_DOWNLOADS; 85 86 /** A magic filename that is allowed to exist within the system cache */ 87 public static final String RECOVERY_DIRECTORY = "recovery"; 88 89 /** The default user agent used for downloads */ 90 public static final String DEFAULT_USER_AGENT; 91 92 static { 93 final StringBuilder builder = new StringBuilder(); 94 95 final boolean validRelease = !TextUtils.isEmpty(Build.VERSION.RELEASE); 96 final boolean validId = !TextUtils.isEmpty(Build.ID); 97 final boolean includeModel = "REL".equals(Build.VERSION.CODENAME) 98 && !TextUtils.isEmpty(Build.MODEL); 99 100 builder.append("AndroidDownloadManager"); 101 if (validRelease) { 102 builder.append("/").append(Build.VERSION.RELEASE); 103 } 104 builder.append(" (Linux; U; Android"); 105 if (validRelease) { 106 builder.append(" ").append(Build.VERSION.RELEASE); 107 } 108 if (includeModel || validId) { 109 builder.append(";"); 110 if (includeModel) { 111 builder.append(" ").append(Build.MODEL); 112 } 113 if (validId) { 114 builder.append(" Build/").append(Build.ID); 115 } 116 } 117 builder.append(")"); 118 119 DEFAULT_USER_AGENT = builder.toString(); 120 } 121 122 /** The MIME type of APKs */ 123 public static final String MIMETYPE_APK = "application/vnd.android.package"; 124 125 /** The buffer size used to stream the data */ 126 public static final int BUFFER_SIZE = 4096; 127 128 /** The minimum amount of progress that has to be done before the progress bar gets updated */ 129 public static final int MIN_PROGRESS_STEP = 4096; 130 131 /** The minimum amount of time that has to elapse before the progress bar gets updated, in ms */ 132 public static final long MIN_PROGRESS_TIME = 1500; 133 134 /** The maximum number of rows in the database (FIFO) */ 135 public static final int MAX_DOWNLOADS = 1000; 136 137 /** 138 * The number of times that the download manager will retry its network 139 * operations when no progress is happening before it gives up. 140 */ 141 public static final int MAX_RETRIES = 5; 142 143 /** 144 * The minimum amount of time that the download manager accepts for 145 * a Retry-After response header with a parameter in delta-seconds. 146 */ 147 public static final int MIN_RETRY_AFTER = 30; // 30s 148 149 /** 150 * The maximum amount of time that the download manager accepts for 151 * a Retry-After response header with a parameter in delta-seconds. 152 */ 153 public static final int MAX_RETRY_AFTER = 24 * 60 * 60; // 24h 154 155 /** 156 * The maximum number of redirects. 157 */ 158 public static final int MAX_REDIRECTS = 5; // can't be more than 7. 159 160 /** 161 * The time between a failure and the first retry after an IOException. 162 * Each subsequent retry grows exponentially, doubling each time. 163 * The time is in seconds. 164 */ 165 public static final int RETRY_FIRST_DELAY = 30; 166 167 /** Enable separate connectivity logging */ 168 static final boolean LOGX = false; 169 170 /** Enable verbose logging - use with "setprop log.tag.DownloadManager VERBOSE" */ 171 private static final boolean LOCAL_LOGV = false; 172 public static final boolean LOGV = LOCAL_LOGV && Log.isLoggable(TAG, Log.VERBOSE); 173 174 /** Enable super-verbose logging */ 175 private static final boolean LOCAL_LOGVV = false; 176 public static final boolean LOGVV = LOCAL_LOGVV && LOGV; 177 } 178