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