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509 lines
19 KiB
509 lines
19 KiB
// Software License Agreement (BSD License)
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//
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// Copyright (c) 2010-2016, Deusty, LLC
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// All rights reserved.
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//
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// Redistribution and use of this software in source and binary forms,
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// with or without modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// * Neither the name of Deusty nor the names of its contributors may be used
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// to endorse or promote products derived from this software without specific
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// prior written permission of Deusty, LLC.
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// Disable legacy macros
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#ifndef DD_LEGACY_MACROS
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#define DD_LEGACY_MACROS 0
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#endif
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#import "OSSDDLog.h"
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@class OSSDDLogFileInfo;
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/**
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* This class provides a logger to write log statements to a file.
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**/
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// Default configuration and safety/sanity values.
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//
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// maximumFileSize -> kDDDefaultLogMaxFileSize
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// rollingFrequency -> kDDDefaultLogRollingFrequency
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// maximumNumberOfLogFiles -> kDDDefaultLogMaxNumLogFiles
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// logFilesDiskQuota -> kDDDefaultLogFilesDiskQuota
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//
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// You should carefully consider the proper configuration values for your application.
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extern unsigned long long const osskDDDefaultLogMaxFileSize;
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extern NSTimeInterval const osskDDDefaultLogRollingFrequency;
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extern NSUInteger const osskDDDefaultLogMaxNumLogFiles;
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extern unsigned long long const osskDDDefaultLogFilesDiskQuota;
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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#pragma mark -
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* The LogFileManager protocol is designed to allow you to control all aspects of your log files.
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*
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* The primary purpose of this is to allow you to do something with the log files after they have been rolled.
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* Perhaps you want to compress them to save disk space.
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* Perhaps you want to upload them to an FTP server.
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* Perhaps you want to run some analytics on the file.
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*
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* A default LogFileManager is, of course, provided.
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* The default LogFileManager simply deletes old log files according to the maximumNumberOfLogFiles property.
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*
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* This protocol provides various methods to fetch the list of log files.
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*
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* There are two variants: sorted and unsorted.
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* If sorting is not necessary, the unsorted variant is obviously faster.
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* The sorted variant will return an array sorted by when the log files were created,
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* with the most recently created log file at index 0, and the oldest log file at the end of the array.
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*
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* You can fetch only the log file paths (full path including name), log file names (name only),
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* or an array of `DDLogFileInfo` objects.
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* The `DDLogFileInfo` class is documented below, and provides a handy wrapper that
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* gives you easy access to various file attributes such as the creation date or the file size.
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*/
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@protocol OSSDDLogFileManager <NSObject>
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@required
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// Public properties
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/**
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* The maximum number of archived log files to keep on disk.
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* For example, if this property is set to 3,
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* then the LogFileManager will only keep 3 archived log files (plus the current active log file) on disk.
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* Once the active log file is rolled/archived, then the oldest of the existing 3 rolled/archived log files is deleted.
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*
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* You may optionally disable this option by setting it to zero.
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**/
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@property (readwrite, assign, atomic) NSUInteger maximumNumberOfLogFiles;
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/**
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* The maximum space that logs can take. On rolling logfile all old logfiles that exceed logFilesDiskQuota will
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* be deleted.
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*
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* You may optionally disable this option by setting it to zero.
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**/
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@property (readwrite, assign, atomic) unsigned long long logFilesDiskQuota;
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// Public methods
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/**
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* Returns the logs directory (path)
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*/
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@property (nonatomic, readonly, copy) NSString *logsDirectory;
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/**
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* Returns an array of `NSString` objects,
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* each of which is the filePath to an existing log file on disk.
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**/
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@property (nonatomic, readonly, strong) NSArray<NSString *> *unsortedLogFilePaths;
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/**
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* Returns an array of `NSString` objects,
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* each of which is the fileName of an existing log file on disk.
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**/
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@property (nonatomic, readonly, strong) NSArray<NSString *> *unsortedLogFileNames;
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/**
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* Returns an array of `DDLogFileInfo` objects,
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* each representing an existing log file on disk,
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* and containing important information about the log file such as it's modification date and size.
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**/
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@property (nonatomic, readonly, strong) NSArray<OSSDDLogFileInfo *> *unsortedLogFileInfos;
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/**
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* Just like the `unsortedLogFilePaths` method, but sorts the array.
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* The items in the array are sorted by creation date.
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* The first item in the array will be the most recently created log file.
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**/
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@property (nonatomic, readonly, strong) NSArray<NSString *> *sortedLogFilePaths;
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/**
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* Just like the `unsortedLogFileNames` method, but sorts the array.
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* The items in the array are sorted by creation date.
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* The first item in the array will be the most recently created log file.
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**/
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@property (nonatomic, readonly, strong) NSArray<NSString *> *sortedLogFileNames;
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/**
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* Just like the `unsortedLogFileInfos` method, but sorts the array.
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* The items in the array are sorted by creation date.
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* The first item in the array will be the most recently created log file.
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**/
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@property (nonatomic, readonly, strong) NSArray<OSSDDLogFileInfo *> *sortedLogFileInfos;
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// Private methods (only to be used by DDFileLogger)
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/**
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* Generates a new unique log file path, and creates the corresponding log file.
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**/
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- (NSString *)createNewLogFile;
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@optional
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// Notifications from DDFileLogger
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/**
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* Called when a log file was archieved
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*/
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- (void)didArchiveLogFile:(NSString *)logFilePath NS_SWIFT_NAME(didArchiveLogFile(atPath:));
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/**
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* Called when the roll action was executed and the log was archieved
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*/
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- (void)didRollAndArchiveLogFile:(NSString *)logFilePath NS_SWIFT_NAME(didRollAndArchiveLogFile(atPath:));
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@end
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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#pragma mark -
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Default log file manager.
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*
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* All log files are placed inside the logsDirectory.
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* If a specific logsDirectory isn't specified, the default directory is used.
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* On Mac, this is in `~/Library/Logs/<Application Name>`.
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* On iPhone, this is in `~/Library/Caches/Logs`.
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*
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* Log files are named `"<bundle identifier> <date> <time>.log"`
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* Example: `com.organization.myapp 2013-12-03 17-14.log`
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*
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* Archived log files are automatically deleted according to the `maximumNumberOfLogFiles` property.
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**/
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@interface OSSDDLogFileManagerDefault : NSObject <OSSDDLogFileManager>
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/**
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* Default initializer
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*/
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- (instancetype)init;
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/**
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* Designated initialized, requires the logs directory
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*/
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- (instancetype)initWithLogsDirectory:(NSString *)logsDirectory NS_DESIGNATED_INITIALIZER;
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#if TARGET_OS_IPHONE
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/*
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* Calling this constructor you can override the default "automagically" chosen NSFileProtection level.
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* Useful if you are writing a command line utility / CydiaSubstrate addon for iOS that has no NSBundle
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* or like SpringBoard no BackgroundModes key in the NSBundle:
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* iPhone:~ root# cycript -p SpringBoard
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* cy# [NSBundle mainBundle]
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* #"NSBundle </System/Library/CoreServices/SpringBoard.app> (loaded)"
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* cy# [[NSBundle mainBundle] objectForInfoDictionaryKey:@"UIBackgroundModes"];
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* null
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* cy#
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**/
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- (instancetype)initWithLogsDirectory:(NSString *)logsDirectory defaultFileProtectionLevel:(NSFileProtectionType)fileProtectionLevel;
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#endif
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/*
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* Methods to override.
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*
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* Log files are named `"<bundle identifier> <date> <time>.log"`
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* Example: `com.organization.myapp 2013-12-03 17-14.log`
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*
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* If you wish to change default filename, you can override following two methods.
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* - `newLogFileName` method would be called on new logfile creation.
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* - `isLogFile:` method would be called to filter logfiles from all other files in logsDirectory.
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* You have to parse given filename and return YES if it is logFile.
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*
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* **NOTE**
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* `newLogFileName` returns filename. If appropriate file already exists, number would be added
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* to filename before extension. You have to handle this case in isLogFile: method.
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*
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* Example:
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* - newLogFileName returns `"com.organization.myapp 2013-12-03.log"`,
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* file `"com.organization.myapp 2013-12-03.log"` would be created.
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* - after some time `"com.organization.myapp 2013-12-03.log"` is archived
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* - newLogFileName again returns `"com.organization.myapp 2013-12-03.log"`,
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* file `"com.organization.myapp 2013-12-03 2.log"` would be created.
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* - after some time `"com.organization.myapp 2013-12-03 1.log"` is archived
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* - newLogFileName again returns `"com.organization.myapp 2013-12-03.log"`,
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* file `"com.organization.myapp 2013-12-03 3.log"` would be created.
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**/
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/**
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* Generates log file name with default format `"<bundle identifier> <date> <time>.log"`
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* Example: `MobileSafari 2013-12-03 17-14.log`
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*
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* You can change it by overriding `newLogFileName` and `isLogFile:` methods.
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**/
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@property (readonly, copy) NSString *newLogFileName;
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/**
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* Default log file name is `"<bundle identifier> <date> <time>.log"`.
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* Example: `MobileSafari 2013-12-03 17-14.log`
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*
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* You can change it by overriding `newLogFileName` and `isLogFile:` methods.
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**/
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- (BOOL)isLogFile:(NSString *)fileName NS_SWIFT_NAME(isLogFile(withName:));
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/* Inherited from DDLogFileManager protocol:
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@property (readwrite, assign, atomic) NSUInteger maximumNumberOfLogFiles;
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@property (readwrite, assign, atomic) NSUInteger logFilesDiskQuota;
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- (NSString *)logsDirectory;
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- (NSArray *)unsortedLogFilePaths;
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- (NSArray *)unsortedLogFileNames;
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- (NSArray *)unsortedLogFileInfos;
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- (NSArray *)sortedLogFilePaths;
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- (NSArray *)sortedLogFileNames;
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- (NSArray *)sortedLogFileInfos;
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*/
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@end
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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#pragma mark -
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Most users will want file log messages to be prepended with the date and time.
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* Rather than forcing the majority of users to write their own formatter,
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* we will supply a logical default formatter.
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* Users can easily replace this formatter with their own by invoking the `setLogFormatter:` method.
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* It can also be removed by calling `setLogFormatter:`, and passing a nil parameter.
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*
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* In addition to the convenience of having a logical default formatter,
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* it will also provide a template that makes it easy for developers to copy and change.
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**/
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@interface OSSDDLogFileFormatterDefault : NSObject <OSSDDLogFormatter>
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/**
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* Default initializer
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*/
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- (instancetype)init;
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/**
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* Designated initializer, requires a date formatter
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*/
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- (instancetype)initWithDateFormatter:(NSDateFormatter *)dateFormatter NS_DESIGNATED_INITIALIZER;
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@end
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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#pragma mark -
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* The standard implementation for a file logger
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*/
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@interface OSSDDFileLogger : OSSDDAbstractLogger <OSSDDLogger> {
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OSSDDLogFileInfo *_currentLogFileInfo;
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}
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/**
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* Default initializer
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*/
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- (instancetype)init;
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/**
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* Designated initializer, requires a `DDLogFileManager` instance
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*/
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- (instancetype)initWithLogFileManager:(id <OSSDDLogFileManager>)logFileManager NS_DESIGNATED_INITIALIZER;
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/**
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* Called when the logger is about to write message. Call super before your implementation.
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*/
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- (void)willLogMessage NS_REQUIRES_SUPER;
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/**
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* Called when the logger wrote message. Call super after your implementation.
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*/
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- (void)didLogMessage NS_REQUIRES_SUPER;
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/**
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* Called when the logger checks archive or not current log file.
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* Override this method to exdend standart behavior. By default returns NO.
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*/
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- (BOOL)shouldArchiveRecentLogFileInfo:(OSSDDLogFileInfo *)recentLogFileInfo;
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/**
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* Log File Rolling:
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*
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* `maximumFileSize`:
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* The approximate maximum size (in bytes) to allow log files to grow.
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* If a log file is larger than this value after a log statement is appended,
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* then the log file is rolled.
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*
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* `rollingFrequency`
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* How often to roll the log file.
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* The frequency is given as an `NSTimeInterval`, which is a double that specifies the interval in seconds.
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* Once the log file gets to be this old, it is rolled.
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*
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* `doNotReuseLogFiles`
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* When set, will always create a new log file at application launch.
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*
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* Both the `maximumFileSize` and the `rollingFrequency` are used to manage rolling.
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* Whichever occurs first will cause the log file to be rolled.
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*
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* For example:
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* The `rollingFrequency` is 24 hours,
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* but the log file surpasses the `maximumFileSize` after only 20 hours.
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* The log file will be rolled at that 20 hour mark.
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* A new log file will be created, and the 24 hour timer will be restarted.
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*
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* You may optionally disable rolling due to filesize by setting `maximumFileSize` to zero.
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* If you do so, rolling is based solely on `rollingFrequency`.
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*
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* You may optionally disable rolling due to time by setting `rollingFrequency` to zero (or any non-positive number).
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* If you do so, rolling is based solely on `maximumFileSize`.
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*
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* If you disable both `maximumFileSize` and `rollingFrequency`, then the log file won't ever be rolled.
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* This is strongly discouraged.
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**/
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@property (readwrite, assign) unsigned long long maximumFileSize;
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/**
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* See description for `maximumFileSize`
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*/
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@property (readwrite, assign) NSTimeInterval rollingFrequency;
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/**
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* See description for `maximumFileSize`
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*/
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@property (readwrite, assign, atomic) BOOL doNotReuseLogFiles;
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/**
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* The DDLogFileManager instance can be used to retrieve the list of log files,
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* and configure the maximum number of archived log files to keep.
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*
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* @see DDLogFileManager.maximumNumberOfLogFiles
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**/
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@property (strong, nonatomic, readonly) id <OSSDDLogFileManager> logFileManager;
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/**
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* When using a custom formatter you can set the `logMessage` method not to append
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* `\n` character after each output. This allows for some greater flexibility with
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* custom formatters. Default value is YES.
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**/
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@property (nonatomic, readwrite, assign) BOOL automaticallyAppendNewlineForCustomFormatters;
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/**
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* You can optionally force the current log file to be rolled with this method.
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* CompletionBlock will be called on main queue.
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*/
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- (void)rollLogFileWithCompletionBlock:(void (^)(void))completionBlock NS_SWIFT_NAME(rollLogFile(withCompletion:));
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/**
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* Method is deprecated.
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* @deprecated Use `rollLogFileWithCompletionBlock:` method instead.
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*/
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- (void)rollLogFile __attribute((deprecated));
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// Inherited from DDAbstractLogger
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// - (id <DDLogFormatter>)logFormatter;
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// - (void)setLogFormatter:(id <DDLogFormatter>)formatter;
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/**
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* Returns the log file that should be used.
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* If there is an existing log file that is suitable,
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* within the constraints of `maximumFileSize` and `rollingFrequency`, then it is returned.
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*
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* Otherwise a new file is created and returned.
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**/
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@property (nonatomic, readonly, strong) OSSDDLogFileInfo *currentLogFileInfo;
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@end
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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#pragma mark -
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* `DDLogFileInfo` is a simple class that provides access to various file attributes.
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* It provides good performance as it only fetches the information if requested,
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* and it caches the information to prevent duplicate fetches.
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*
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* It was designed to provide quick snapshots of the current state of log files,
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* and to help sort log files in an array.
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*
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* This class does not monitor the files, or update it's cached attribute values if the file changes on disk.
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* This is not what the class was designed for.
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*
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* If you absolutely must get updated values,
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* you can invoke the reset method which will clear the cache.
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**/
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@interface OSSDDLogFileInfo : NSObject
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@property (strong, nonatomic, readonly) NSString *filePath;
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@property (strong, nonatomic, readonly) NSString *fileName;
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#if FOUNDATION_SWIFT_SDK_EPOCH_AT_LEAST(8)
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@property (strong, nonatomic, readonly) NSDictionary<NSFileAttributeKey, id> *fileAttributes;
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#else
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@property (strong, nonatomic, readonly) NSDictionary<NSString *, id> *fileAttributes;
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#endif
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@property (strong, nonatomic, readonly) NSDate *creationDate;
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@property (strong, nonatomic, readonly) NSDate *modificationDate;
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@property (nonatomic, readonly) unsigned long long fileSize;
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@property (nonatomic, readonly) NSTimeInterval age;
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@property (nonatomic, readwrite) BOOL isArchived;
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+ (instancetype)logFileWithPath:(NSString *)filePath NS_SWIFT_UNAVAILABLE("Use init(filePath:)");
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- (instancetype)init NS_UNAVAILABLE;
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- (instancetype)initWithFilePath:(NSString *)filePath NS_DESIGNATED_INITIALIZER;
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- (void)reset;
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- (void)renameFile:(NSString *)newFileName NS_SWIFT_NAME(renameFile(to:));
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#if TARGET_IPHONE_SIMULATOR
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// So here's the situation.
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// Extended attributes are perfect for what we're trying to do here (marking files as archived).
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// This is exactly what extended attributes were designed for.
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//
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// But Apple screws us over on the simulator.
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// Everytime you build-and-go, they copy the application into a new folder on the hard drive,
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// and as part of the process they strip extended attributes from our log files.
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// Normally, a copy of a file preserves extended attributes.
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// So obviously Apple has gone to great lengths to piss us off.
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//
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// Thus we use a slightly different tactic for marking log files as archived in the simulator.
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// That way it "just works" and there's no confusion when testing.
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//
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// The difference in method names is indicative of the difference in functionality.
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// On the simulator we add an attribute by appending a filename extension.
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//
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// For example:
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// "mylog.txt" -> "mylog.archived.txt"
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// "mylog" -> "mylog.archived"
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- (BOOL)hasExtensionAttributeWithName:(NSString *)attrName;
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- (void)addExtensionAttributeWithName:(NSString *)attrName;
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- (void)removeExtensionAttributeWithName:(NSString *)attrName;
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#else /* if TARGET_IPHONE_SIMULATOR */
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// Normal use of extended attributes used everywhere else,
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// such as on Macs and on iPhone devices.
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- (BOOL)hasExtendedAttributeWithName:(NSString *)attrName;
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- (void)addExtendedAttributeWithName:(NSString *)attrName;
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- (void)removeExtendedAttributeWithName:(NSString *)attrName;
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#endif /* if TARGET_IPHONE_SIMULATOR */
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@end
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