├── .gitignore ├── .swiftpm └── xcode │ └── package.xcworkspace │ └── contents.xcworkspacedata ├── CacheDemo ├── CacheDemo.xcodeproj │ ├── project.pbxproj │ └── project.xcworkspace │ │ └── contents.xcworkspacedata ├── CacheDemo.xcworkspace │ ├── contents.xcworkspacedata │ └── xcshareddata │ │ └── IDEWorkspaceChecks.plist ├── CacheDemo │ ├── AppDelegate.swift │ ├── Assets.xcassets │ │ └── AppIcon.appiconset │ │ │ └── Contents.json │ ├── Base.lproj │ │ ├── LaunchScreen.storyboard │ │ └── Main.storyboard │ ├── Info.plist │ ├── Objects │ │ ├── MyObject.swift │ │ └── User.swift │ ├── ViewController.swift │ └── dog.jpg ├── CacheDemoTests │ ├── CacheDemoTests.swift │ └── Info.plist ├── Podfile └── Podfile.lock ├── DataCache.podspec ├── LICENSE ├── Package.swift ├── README.md └── Sources ├── DataCache.swift ├── Dictionary+Cache.swift └── String+MD5.swift /.gitignore: -------------------------------------------------------------------------------- 1 | # Xcode 2 | # 3 | # gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore 4 | 5 | ## Build generated 6 | build/ 7 | DerivedData/ 8 | 9 | ## Various settings 10 | *.pbxuser 11 | !default.pbxuser 12 | *.mode1v3 13 | !default.mode1v3 14 | *.mode2v3 15 | !default.mode2v3 16 | *.perspectivev3 17 | !default.perspectivev3 18 | xcuserdata/ 19 | 20 | ## Other 21 | *.moved-aside 22 | *.xcuserstate 23 | 24 | ## Obj-C/Swift specific 25 | *.hmap 26 | *.ipa 27 | *.dSYM.zip 28 | *.dSYM 29 | 30 | ## Playgrounds 31 | timeline.xctimeline 32 | playground.xcworkspace 33 | 34 | # Swift Package Manager 35 | # 36 | # Add this line if you want to avoid checking in source code from Swift Package Manager dependencies. 37 | # Packages/ 38 | .build/ 39 | 40 | # CocoaPods 41 | # 42 | # We recommend against adding the Pods directory to your .gitignore. However 43 | # you should judge for yourself, the pros and cons are mentioned at: 44 | # https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control 45 | # 46 | # Pods/ 47 | 48 | # Carthage 49 | # 50 | # Add this line if you want to avoid checking in source code from Carthage dependencies. 51 | # Carthage/Checkouts 52 | 53 | Carthage/Build 54 | 55 | # fastlane 56 | # 57 | # It is recommended to not store the screenshots in the git repo. Instead, use fastlane to re-generate the 58 | # screenshots whenever they are needed. 59 | # For more information about the recommended setup visit: 60 | # https://github.com/fastlane/fastlane/blob/master/fastlane/docs/Gitignore.md 61 | 62 | fastlane/report.xml 63 | fastlane/Preview.html 64 | fastlane/screenshots 65 | fastlane/test_output 66 | CacheDemo/Pods 67 | -------------------------------------------------------------------------------- /.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /CacheDemo/CacheDemo.xcodeproj/project.pbxproj: -------------------------------------------------------------------------------- 1 | // !$*UTF8*$! 2 | { 3 | archiveVersion = 1; 4 | classes = { 5 | }; 6 | objectVersion = 46; 7 | objects = { 8 | 9 | /* Begin PBXBuildFile section */ 10 | 434929082669DB480039D287 /* User.swift in Sources */ = {isa = PBXBuildFile; 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574 | defaultConfigurationIsVisible = 0; 575 | defaultConfigurationName = Release; 576 | }; 577 | 61EA9DDD1D34D3430081FA76 /* Build configuration list for PBXNativeTarget "CacheDemoTests" */ = { 578 | isa = XCConfigurationList; 579 | buildConfigurations = ( 580 | 61EA9DDE1D34D3430081FA76 /* Debug */, 581 | 61EA9DDF1D34D3430081FA76 /* Release */, 582 | ); 583 | defaultConfigurationIsVisible = 0; 584 | defaultConfigurationName = Release; 585 | }; 586 | /* End XCConfigurationList section */ 587 | }; 588 | rootObject = 61C479E31D2A5E44001D1BE7 /* Project object */; 589 | } 590 | -------------------------------------------------------------------------------- /CacheDemo/CacheDemo.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /CacheDemo/CacheDemo.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /CacheDemo/CacheDemo.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | IDEDidComputeMac32BitWarning 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /CacheDemo/CacheDemo/AppDelegate.swift: -------------------------------------------------------------------------------- 1 | // 2 | // AppDelegate.swift 3 | // CacheDemo 4 | // 5 | // Created by Nguyen Cong Huy on 7/4/16. 6 | // Copyright © 2016 Nguyen Cong Huy. All rights reserved. 7 | // 8 | 9 | import UIKit 10 | 11 | @UIApplicationMain 12 | class AppDelegate: UIResponder, UIApplicationDelegate { 13 | 14 | var window: UIWindow? 15 | 16 | 17 | func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool { 18 | // Override point for customization after application launch. 19 | return true 20 | } 21 | 22 | func applicationWillResignActive(_ application: UIApplication) { 23 | // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state. 24 | // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game. 25 | } 26 | 27 | func applicationDidEnterBackground(_ application: UIApplication) { 28 | // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later. 29 | // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits. 30 | } 31 | 32 | func applicationWillEnterForeground(_ application: UIApplication) { 33 | // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background. 34 | } 35 | 36 | func applicationDidBecomeActive(_ application: UIApplication) { 37 | // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface. 38 | } 39 | 40 | func applicationWillTerminate(_ application: UIApplication) { 41 | // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:. 42 | } 43 | 44 | 45 | } 46 | 47 | -------------------------------------------------------------------------------- /CacheDemo/CacheDemo/Assets.xcassets/AppIcon.appiconset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "idiom" : "iphone", 5 | "size" : "29x29", 6 | "scale" : "2x" 7 | }, 8 | { 9 | "idiom" : "iphone", 10 | "size" : "29x29", 11 | "scale" : "3x" 12 | }, 13 | { 14 | "idiom" : "iphone", 15 | "size" : "40x40", 16 | "scale" : "2x" 17 | }, 18 | { 19 | "idiom" : "iphone", 20 | "size" : "40x40", 21 | "scale" : "3x" 22 | }, 23 | { 24 | "idiom" : "iphone", 25 | "size" : "60x60", 26 | "scale" : "2x" 27 | }, 28 | { 29 | "idiom" : "iphone", 30 | "size" : "60x60", 31 | "scale" : "3x" 32 | }, 33 | { 34 | "idiom" : "ipad", 35 | "size" : "29x29", 36 | "scale" : "1x" 37 | }, 38 | { 39 | "idiom" : "ipad", 40 | "size" : "29x29", 41 | "scale" : "2x" 42 | }, 43 | { 44 | "idiom" : "ipad", 45 | "size" : "40x40", 46 | "scale" : "1x" 47 | }, 48 | { 49 | "idiom" : "ipad", 50 | "size" : "40x40", 51 | "scale" : "2x" 52 | }, 53 | { 54 | "idiom" : "ipad", 55 | "size" : "76x76", 56 | "scale" : "1x" 57 | }, 58 | { 59 | "idiom" : "ipad", 60 | "size" : "76x76", 61 | "scale" : "2x" 62 | } 63 | ], 64 | "info" : { 65 | "version" : 1, 66 | "author" : "xcode" 67 | } 68 | } -------------------------------------------------------------------------------- /CacheDemo/CacheDemo/Base.lproj/LaunchScreen.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | -------------------------------------------------------------------------------- /CacheDemo/CacheDemo/Base.lproj/Main.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 46 | 52 | 53 | 54 | 55 | 56 | 57 | 63 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | -------------------------------------------------------------------------------- /CacheDemo/CacheDemo/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | en 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | $(PRODUCT_BUNDLE_IDENTIFIER) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | APPL 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleSignature 20 | ???? 21 | CFBundleVersion 22 | 1 23 | LSRequiresIPhoneOS 24 | 25 | NSAppTransportSecurity 26 | 27 | NSAllowsArbitraryLoads 28 | 29 | 30 | UILaunchStoryboardName 31 | LaunchScreen 32 | UIMainStoryboardFile 33 | Main 34 | UIRequiredDeviceCapabilities 35 | 36 | armv7 37 | 38 | UISupportedInterfaceOrientations 39 | 40 | UIInterfaceOrientationPortrait 41 | 42 | UISupportedInterfaceOrientations~ipad 43 | 44 | UIInterfaceOrientationPortrait 45 | UIInterfaceOrientationPortraitUpsideDown 46 | UIInterfaceOrientationLandscapeLeft 47 | UIInterfaceOrientationLandscapeRight 48 | 49 | 50 | 51 | -------------------------------------------------------------------------------- /CacheDemo/CacheDemo/Objects/MyObject.swift: -------------------------------------------------------------------------------- 1 | // 2 | // MyObject.swift 3 | // CacheDemo 4 | // 5 | // Created by Nguyen Cong Huy on 7/11/16. 6 | // Copyright © 2016 Nguyen Cong Huy. All rights reserved. 7 | // 8 | 9 | import UIKit 10 | 11 | open class MyObject: NSObject, NSCoding { 12 | open var name = "" 13 | open var yearOld = 0 14 | 15 | override init() { 16 | 17 | } 18 | 19 | public required init?(coder aDecoder: NSCoder) { 20 | self.name = aDecoder.decodeObject(forKey: "name") as! String 21 | self.yearOld = aDecoder.decodeInteger(forKey: "yearOld") 22 | } 23 | 24 | open func encode(with aCoder: NSCoder) { 25 | aCoder.encode(self.name, forKey: "name") 26 | aCoder.encode(self.yearOld, forKey: "yearOld") 27 | } 28 | } 29 | -------------------------------------------------------------------------------- /CacheDemo/CacheDemo/Objects/User.swift: -------------------------------------------------------------------------------- 1 | // 2 | // User.swift 3 | // CacheDemo 4 | // 5 | // Created by Nguyen Cong Huy on 04/06/2021. 6 | // Copyright © 2021 Nguyen Cong Huy. All rights reserved. 7 | // 8 | 9 | import Foundation 10 | 11 | struct User: Codable, Equatable { 12 | let name: String 13 | let yearOld: Double 14 | } 15 | -------------------------------------------------------------------------------- /CacheDemo/CacheDemo/ViewController.swift: -------------------------------------------------------------------------------- 1 | // 2 | // ViewController.swift 3 | // CacheDemo 4 | // 5 | // Created by Nguyen Cong Huy on 7/4/16. 6 | // Copyright © 2016 Nguyen Cong Huy. All rights reserved. 7 | // 8 | 9 | import UIKit 10 | import DataCache 11 | 12 | class ViewController: UIViewController { 13 | 14 | static let imageKey = "imageKey" 15 | 16 | @IBOutlet weak var keyTextField: UITextField! 17 | @IBOutlet weak var valueTextField: UITextField! 18 | @IBOutlet weak var imageView: UIImageView! 19 | 20 | override func viewDidLoad() { 21 | super.viewDidLoad() 22 | } 23 | 24 | @IBAction func readButtonTouched(_ sender: AnyObject) { 25 | let key = keyTextField.text! 26 | let cachedString = DataCache.instance.readString(forKey: key) 27 | valueTextField.text = cachedString 28 | } 29 | 30 | @IBAction func writeButtonTouched(_ sender: AnyObject) { 31 | let string = valueTextField.text! 32 | let key = keyTextField.text! 33 | DataCache.instance.write(string: string, forKey: key) 34 | } 35 | 36 | @IBAction func cleanButtonTapped(_ sender: AnyObject) { 37 | let key = keyTextField.text! 38 | DataCache.instance.clean(byKey: key) 39 | } 40 | 41 | @IBAction func cleanAllButtonTapped(_ sender: AnyObject) { 42 | DataCache.instance.cleanAll() 43 | } 44 | 45 | func writeImageToCache() { 46 | let image = UIImage(named: "dog.jpg") 47 | DataCache.instance.write(image: image!, forKey: ViewController.imageKey) 48 | } 49 | 50 | func readImageFromCacheAndShow() { 51 | let image = DataCache.instance.readImage(forKey: ViewController.imageKey) 52 | imageView.image = image 53 | } 54 | } 55 | 56 | -------------------------------------------------------------------------------- /CacheDemo/CacheDemo/dog.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/huynguyencong/DataCache/bcb54d313a6ab16fc3f8fa5884ec0f5f331c6ae3/CacheDemo/CacheDemo/dog.jpg -------------------------------------------------------------------------------- /CacheDemo/CacheDemoTests/CacheDemoTests.swift: -------------------------------------------------------------------------------- 1 | // 2 | // CacheDemoTests.swift 3 | // CacheDemoTests 4 | // 5 | // Created by Nguyen Cong Huy on 7/12/16. 6 | // Copyright © 2016 Nguyen Cong Huy. All rights reserved. 7 | // 8 | 9 | import XCTest 10 | @testable import DataCache 11 | @testable import CacheDemo 12 | 13 | class CacheDemoTests: XCTestCase { 14 | 15 | override func setUp() { 16 | super.setUp() 17 | } 18 | 19 | override func tearDown() { 20 | // Put teardown code here. This method is called after the invocation of each test method in the class. 21 | super.tearDown() 22 | } 23 | 24 | func testReadWriteCache() { 25 | let str = "testReadWriteCache" 26 | let key = "testReadWriteCacheKey" 27 | 28 | DataCache.instance.write(object:str as NSCoding, forKey: key) 29 | let cachedString = DataCache.instance.readString(forKey: key) 30 | 31 | XCTAssert(cachedString == str) 32 | } 33 | 34 | func testReadWriteCodable() { 35 | let user = User(name: "Minh", yearOld: 20) 36 | let key = "testReadWriteCodableKey" 37 | 38 | do { 39 | try DataCache.instance.write(codable: user, forKey: key) 40 | let readUser: User? = try DataCache.instance.readCodable(forKey: key) 41 | XCTAssert(readUser == user) 42 | } catch { 43 | assertionFailure(error.localizedDescription) 44 | } 45 | } 46 | 47 | func testWriteCacheToDisk() { 48 | let str = "testWriteCacheToDisk" 49 | let key = "testWriteCacheToDiskKey" 50 | 51 | let expectation = self.expectation(description: "Write to disk is an asynchonous operation") 52 | 53 | DataCache.instance.write(object: str as NSCoding, forKey: key) 54 | DataCache.instance.cleanMemCache() 55 | 56 | // wait for write to disk successful 57 | DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + Double((Int64)(1 * NSEC_PER_SEC)) / Double(NSEC_PER_SEC)) { 58 | let cachedString = DataCache.instance.readString(forKey: key) 59 | XCTAssert(cachedString == str) 60 | expectation.fulfill() 61 | } 62 | 63 | waitForExpectations(timeout: 2) { (error) in 64 | if let error = error { 65 | XCTFail("waitForExpectationsWithTimeout errored: \(error)") 66 | } 67 | } 68 | } 69 | 70 | func testReadWriteImage() { 71 | let image = UIImage(named: "dog.jpg") 72 | let key = "testReadWriteImageKey" 73 | 74 | DataCache.instance.write(image: image!, forKey: key) 75 | let cachedImage = DataCache.instance.readImageForKey(key: key) 76 | 77 | if let image = image, let cachedImage = cachedImage { 78 | XCTAssert(image.size == cachedImage.size) 79 | } 80 | else { 81 | XCTFail() 82 | } 83 | } 84 | 85 | func testHasDataOnDiskForKey() { 86 | let str = "testHasDataOnDiskForKey" 87 | let key = "testHasDataOnDiskForKeyKey" 88 | let expectation = self.expectation(description: "Write to disk is an asynchonous operation") 89 | 90 | DataCache.instance.write(object: str as NSCoding, forKey: key) 91 | 92 | // wait for write to disk successful 93 | DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + Double((Int64)(1 * NSEC_PER_SEC)) / Double(NSEC_PER_SEC)) { 94 | let hasDataOnDisk = DataCache.instance.hasDataOnDisk(forKey: key) 95 | XCTAssert(hasDataOnDisk == true) 96 | expectation.fulfill() 97 | } 98 | 99 | waitForExpectations(timeout: 2) { (error) in 100 | if let error = error { 101 | XCTFail("waitForExpectationsWithTimeout errored: \(error)") 102 | } 103 | } 104 | } 105 | 106 | func testHasDataOnMemForKey() { 107 | let str = "testHasDataOnMemForKey" 108 | let key = "testHasDataOnMemForKeyKey" 109 | 110 | DataCache.instance.write(object: str as NSCoding, forKey: key) 111 | let hasDataOnMem = DataCache.instance.hasDataOnMem(forKey: key) 112 | 113 | XCTAssert(hasDataOnMem == true) 114 | } 115 | 116 | func testCleanCache() { 117 | let str = "testCleanCache" 118 | let key = "testCleanCacheKey" 119 | let expectation = self.expectation(description: "Clean is an asynchonous operation") 120 | 121 | DataCache.instance.write(object: str as NSCoding, forKey: key) 122 | 123 | DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + Double((Int64)(1 * NSEC_PER_SEC)) / Double(NSEC_PER_SEC)) { 124 | DataCache.instance.cleanAll() 125 | 126 | DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + Double((Int64)(1 * NSEC_PER_SEC)) / Double(NSEC_PER_SEC)) { 127 | let cachedString = DataCache.instance.readString(forKey: key) 128 | XCTAssert(cachedString == nil) 129 | expectation.fulfill() 130 | } 131 | } 132 | 133 | waitForExpectations(timeout: 3) { (error) in 134 | if let error = error { 135 | XCTFail("waitForExpectationsWithTimeout errored: \(error)") 136 | } 137 | } 138 | } 139 | } 140 | -------------------------------------------------------------------------------- /CacheDemo/CacheDemoTests/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | en 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | $(PRODUCT_BUNDLE_IDENTIFIER) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | BNDL 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleSignature 20 | ???? 21 | CFBundleVersion 22 | 1 23 | 24 | 25 | -------------------------------------------------------------------------------- /CacheDemo/Podfile: -------------------------------------------------------------------------------- 1 | platform :ios, "9.0" 2 | 3 | use_frameworks! 4 | 5 | def commonpods 6 | pod 'DataCache', :path => '../' 7 | end 8 | 9 | 10 | target 'CacheDemo' do 11 | commonpods 12 | end 13 | 14 | target 'CacheDemoTests' do 15 | commonpods 16 | end 17 | -------------------------------------------------------------------------------- /CacheDemo/Podfile.lock: -------------------------------------------------------------------------------- 1 | PODS: 2 | - DataCache (1.4) 3 | 4 | DEPENDENCIES: 5 | - DataCache (from `../`) 6 | 7 | EXTERNAL SOURCES: 8 | DataCache: 9 | :path: "../" 10 | 11 | SPEC CHECKSUMS: 12 | DataCache: 58345b1a6c12fed9919fe4c00716ede7bc7e8142 13 | 14 | PODFILE CHECKSUM: 173aa6faeefae7d64a11c9fa0c3b367ba970633a 15 | 16 | COCOAPODS: 1.6.1 17 | -------------------------------------------------------------------------------- /DataCache.podspec: -------------------------------------------------------------------------------- 1 | Pod::Spec.new do |s| 2 | s.name = 'DataCache' 3 | s.version = '1.7' 4 | s.summary = 'Simplest way to cache data on memory and disk' 5 | s.homepage = 'https://github.com/huynguyencong/DataCache' 6 | s.license = { :type => 'MIT', :file => 'LICENSE' } 7 | s.source = { :git => 'https://github.com/huynguyencong/DataCache.git', :tag => "#{s.version}" } 8 | s.author = { 'Huy Nguyen Cong' => 'https://github.com/huynguyencong' } 9 | s.osx.deployment_target = '10.11' 10 | s.ios.deployment_target = '13.0' 11 | s.source_files = 'Sources/*.{swift}' 12 | s.requires_arc = true 13 | s.swift_versions = ['5.7.1'] 14 | end 15 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | The MIT License (MIT) 2 | 3 | Copyright (c) 2016 Huy Nguyen 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /Package.swift: -------------------------------------------------------------------------------- 1 | // swift-tools-version:5.3 2 | // The swift-tools-version declares the minimum version of Swift required to build this package. 3 | 4 | import PackageDescription 5 | 6 | let package = Package( 7 | name: "DataCache", 8 | platforms: [ 9 | .macOS(.v10_11), 10 | .iOS(.v13) 11 | ], 12 | products: [ 13 | // Products define the executables and libraries a package produces, and make them visible to other packages. 14 | .library( 15 | name: "DataCache", 16 | targets: ["DataCache"]), 17 | ], 18 | dependencies: [ 19 | // Dependencies declare other packages that this package depends on. 20 | // .package(url: /* package url */, from: "1.0.0"), 21 | ], 22 | targets: [ 23 | // Targets are the basic building blocks of a package. A target can define a module or a test suite. 24 | // Targets can depend on other targets in this package, and on products in packages this package depends on. 25 | .target( 26 | name: "DataCache", 27 | path: "Sources") 28 | ] 29 | ) 30 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Cache 2 | This is a simple disk and memory cache for iOS and macOS written in Swift. It can cache `Codable` types, `NSCoding` types, primitive types (`String`, `Int`, `Array`, etc.). 3 | 4 | ## Why would I like to use it? 5 | There are some reasons why you would like to use this libary for caching: 6 | 7 | - Easiest, simplest way to cache, store data in memory and disk. 8 | - Fast response time. Instead of waiting for data loading from Internet, now you can load it from cache before update it from remote resources. 9 | - Loading data from cache, just update from remote source when the cache expired, will save user's Internet data (especially mobile data) and help to improve battery life. 10 | - It stores data on disk and memory. When you read cache, it will try to get data from memory first. That makes reading speed fast. It cleans memory cache when RAM is full automatically, so it doesn't make your application out of memory. 11 | 12 | ## Compatibility 13 | - iOS 9/macOS 10.11 and later (if you want to use it on iOS 7, you can add files manually) 14 | - Swift 5 and later (for earlier Swift version, please use earlier DataCache version) 15 | 16 | ## Usage 17 | ### Installing 18 | #### Cocoapod 19 | Add below lines to your Podfile: 20 | 21 | ```ruby 22 | pod 'DataCache' 23 | ``` 24 | 25 | Note: If above pod doesn't work, try using the below pod defination in Podfile: 26 | `pod 'DataCache', :git => 'https://github.com/huynguyencong/DataCache.git'` 27 | 28 | #### Swift Package Manager 29 | In Xcode, select menu File -> Swift Packages -> Add Package Dependency. Select a target, then add this link to the input field: 30 | `https://github.com/huynguyencong/DataCache.git` 31 | 32 | #### Manually 33 | Add all files in the `Sources` folder to your project. 34 | 35 | ### Simple to use 36 | Use default cache a create new cache if you want. In each cache instance, you can setup cache size and expired time. 37 | #### Read and write an object 38 | 39 | Cache `Codable` types, include your custom types that conformed to `Codable` protocol, and primitive types (`String`, `Int`, etc.) which have already conformed to `Codable` by default. 40 | 41 | - Write: 42 | ```swift 43 | do { 44 | try DataCache.instance.write(codable: myCodableObject, forKey: "myKey") 45 | } catch { 46 | print("Write error \(error.localizedDescription)") 47 | } 48 | ``` 49 | 50 | - Read: 51 | 52 | ```swift 53 | do { 54 | let object: MyCodableObject? = try DataCache.instance.readCodable(forKey: "myKey") 55 | } catch { 56 | print("Read error \(error.localizedDescription)") 57 | } 58 | ``` 59 | 60 | #### Read and write `UIImage` or `NSImage` 61 | 62 | - Write: 63 | ```swift 64 | // on iOS 65 | let image = UIImage(named: "myImageName") 66 | // on macOS 67 | let image = NSImage(named: "myImageName") 68 | // will be written in a same way 69 | DataCache.instance.write(image: image!, forKey: "imageKey") 70 | ``` 71 | 72 | - Read: 73 | ```swift 74 | let image = DataCache.instance.readImage(forKey: "imageKey") 75 | ``` 76 | 77 | #### Read and write `Data` 78 | 79 | - Write: 80 | ```swift 81 | let data = ... // your data 82 | DataCache.instance.write(data: data, forKey: "myKey") 83 | ``` 84 | 85 | - Read: 86 | ```swift 87 | let data = DataCache.instance.readData(forKey: "myKey") 88 | ``` 89 | 90 | #### Clean cache 91 | 92 | You can clean by key, or clean all, use one of below methods: 93 | ```swift 94 | DataCache.instance.clean(byKey: "myKey") 95 | DataCache.instance.cleanAll() 96 | ``` 97 | It also clear cache after expiration day. The Default expiration day is 1 week. If you want to customize expiration, please create your customized cache by below instruction. 98 | 99 | #### Custom a class for cache ability 100 | Just make your type conform to Codable. 101 | 102 | ```swift 103 | struct User: Codable { 104 | let name: String 105 | let yearOld: Double 106 | } 107 | ``` 108 | 109 | #### Create custom Cache instance 110 | 111 | Beside using default cache `DataCache.instance`, you can create your cache instances, then you can set different expiration time, disk size, disk path. The name parameter specifies path name for disk cache. 112 | 113 | ```swift 114 | let cache = DataCache(name: "MyCustomCache") 115 | cache.maxDiskCacheSize = 100*1024*1024 // 100 MB 116 | cache.maxCachePeriodInSecond = 7*86400 // 1 week 117 | ``` 118 | 119 | ## License 120 | This open source use some piece of code from Kingfisher library. 121 | 122 | DataCache is released under the MIT license. See LICENSE for details. Copyright © Nguyen Cong Huy 123 | -------------------------------------------------------------------------------- /Sources/DataCache.swift: -------------------------------------------------------------------------------- 1 | // 2 | // Cache.swift 3 | // CacheDemo 4 | // 5 | // Created by Nguyen Cong Huy on 7/4/16. 6 | // Copyright © 2016 Nguyen Cong Huy. All rights reserved. 7 | // 8 | 9 | #if os(iOS) 10 | import UIKit 11 | #elseif os(OSX) 12 | import AppKit 13 | #endif 14 | 15 | public enum ImageFormat { 16 | case unknown, png, jpeg 17 | } 18 | 19 | open class DataCache { 20 | static let cacheDirectoryPrefix = "com.nch.cache." 21 | static let ioQueuePrefix = "com.nch.queue." 22 | static let defaultMaxCachePeriodInSecond: TimeInterval = 60 * 60 * 24 * 7 // a week 23 | 24 | public static let instance = DataCache(name: "default") 25 | 26 | let cachePath: String 27 | 28 | let memCache = NSCache() 29 | let ioQueue: DispatchQueue 30 | let fileManager: FileManager 31 | 32 | /// Name of cache 33 | open var name: String = "" 34 | 35 | /// Life time of disk cache, in second. Default is a week 36 | open var maxCachePeriodInSecond = DataCache.defaultMaxCachePeriodInSecond 37 | 38 | /// Size is allocated for disk cache, in byte. 0 mean no limit. Default is 0 39 | open var maxDiskCacheSize: UInt = 0 40 | 41 | /// Specify distinc name param, it represents folder name for disk cache 42 | public init(name: String, path: String? = nil) { 43 | self.name = name 44 | 45 | var cachePath = path ?? NSSearchPathForDirectoriesInDomains(.cachesDirectory, FileManager.SearchPathDomainMask.userDomainMask, true).first! 46 | cachePath = (cachePath as NSString).appendingPathComponent(DataCache.cacheDirectoryPrefix + name) 47 | self.cachePath = cachePath 48 | 49 | ioQueue = DispatchQueue(label: DataCache.ioQueuePrefix + name) 50 | 51 | self.fileManager = FileManager() 52 | 53 | #if !os(OSX) && !os(watchOS) 54 | NotificationCenter.default.addObserver(self, selector: #selector(cleanExpiredDiskCache), name: UIApplication.willTerminateNotification, object: nil) 55 | NotificationCenter.default.addObserver(self, selector: #selector(cleanExpiredDiskCache), name: UIApplication.didEnterBackgroundNotification, object: nil) 56 | #endif 57 | } 58 | 59 | deinit { 60 | NotificationCenter.default.removeObserver(self) 61 | } 62 | } 63 | 64 | // MARK: - Store data 65 | 66 | extension DataCache { 67 | 68 | /// Write data for key. This is an async operation. 69 | public func write(data: Data, forKey key: String) { 70 | memCache.setObject(data as AnyObject, forKey: key as AnyObject) 71 | writeDataToDisk(data: data, key: key) 72 | } 73 | 74 | private func writeDataToDisk(data: Data, key: String) { 75 | ioQueue.async { 76 | if self.fileManager.fileExists(atPath: self.cachePath) == false { 77 | do { 78 | try self.fileManager.createDirectory(atPath: self.cachePath, withIntermediateDirectories: true, attributes: nil) 79 | } catch { 80 | print("DataCache: Error while creating cache folder: \(error.localizedDescription)") 81 | } 82 | } 83 | 84 | self.fileManager.createFile(atPath: self.cachePath(forKey: key), contents: data, attributes: nil) 85 | } 86 | } 87 | 88 | /// Read data for key 89 | public func readData(forKey key:String) -> Data? { 90 | var data = memCache.object(forKey: key as AnyObject) as? Data 91 | 92 | if data == nil { 93 | if let dataFromDisk = readDataFromDisk(forKey: key) { 94 | data = dataFromDisk 95 | memCache.setObject(dataFromDisk as AnyObject, forKey: key as AnyObject) 96 | } 97 | } 98 | 99 | return data 100 | } 101 | 102 | /// Read data from disk for key 103 | public func readDataFromDisk(forKey key: String) -> Data? { 104 | return self.fileManager.contents(atPath: cachePath(forKey: key)) 105 | } 106 | 107 | // MARK: - Read & write Codable types 108 | public func write(codable: T, forKey key: String) throws { 109 | let data = try JSONEncoder().encode(codable) 110 | write(data: data, forKey: key) 111 | } 112 | 113 | public func readCodable(forKey key: String) throws -> T? { 114 | guard let data = readData(forKey: key) else { return nil } 115 | return try JSONDecoder().decode(T.self, from: data) 116 | } 117 | 118 | // MARK: - Read & write primitive types 119 | 120 | 121 | /// Write an object for key. This object must inherit from `NSObject` and implement `NSCoding` protocol. `String`, `Array`, `Dictionary` conform to this method. 122 | /// 123 | /// NOTE: Can't write `UIImage` with this method. Please use `writeImage(_:forKey:)` to write an image 124 | public func write(object: NSCoding, forKey key: String) { 125 | let data = NSKeyedArchiver.archivedData(withRootObject: object) 126 | write(data: data, forKey: key) 127 | } 128 | 129 | /// Write a string for key 130 | public func write(string: String, forKey key: String) { 131 | write(object: string as NSCoding, forKey: key) 132 | } 133 | 134 | /// Write a dictionary for key 135 | public func write(dictionary: Dictionary, forKey key: String) { 136 | write(object: dictionary as NSCoding, forKey: key) 137 | } 138 | 139 | /// Write an array for key 140 | public func write(array: Array, forKey key: String) { 141 | write(object: array as NSCoding, forKey: key) 142 | } 143 | 144 | /// Read an object for key. This object must inherit from `NSObject` and implement NSCoding protocol. `String`, `Array`, `Dictionary` conform to this method 145 | public func readObject(forKey key: String) -> NSObject? { 146 | let data = readData(forKey: key) 147 | 148 | if let data = data { 149 | return NSKeyedUnarchiver.unarchiveObject(with: data) as? NSObject 150 | } 151 | 152 | return nil 153 | } 154 | 155 | /// Read a string for key 156 | public func readString(forKey key: String) -> String? { 157 | return readObject(forKey: key) as? String 158 | } 159 | 160 | /// Read an array for key 161 | public func readArray(forKey key: String) -> Array? { 162 | return readObject(forKey: key) as? Array 163 | } 164 | 165 | /// Read a dictionary for key 166 | public func readDictionary(forKey key: String) -> Dictionary? { 167 | return readObject(forKey: key) as? Dictionary 168 | } 169 | 170 | // MARK: - Read & write image 171 | 172 | /// Write image for key. Please use this method to write an image instead of `writeObject(_:forKey:)` 173 | #if os(iOS) 174 | public func write(image: UIImage, forKey key: String, format: ImageFormat? = nil) { 175 | var data: Data? = nil 176 | 177 | if let format = format, format == .png { 178 | data = image.pngData() 179 | } 180 | else { 181 | data = image.jpegData(compressionQuality: 0.9) 182 | } 183 | 184 | if let data = data { 185 | write(data: data, forKey: key) 186 | } 187 | } 188 | 189 | /// Read image for key. Please use this method to write an image instead of `readObject(forKey:)` 190 | public func readImage(forKey key: String) -> UIImage? { 191 | let data = readData(forKey: key) 192 | if let data = data { 193 | return UIImage(data: data, scale: 1.0) 194 | } 195 | 196 | return nil 197 | } 198 | 199 | @available(*, deprecated, message: "Please use `readImage(forKey:)` instead. This will be removed in the future.") 200 | public func readImageForKey(key: String) -> UIImage? { 201 | return readImage(forKey: key) 202 | } 203 | #elseif os(OSX) 204 | public func write(image: NSImage, forKey key: String, format: ImageFormat? = nil) { 205 | var data: Data? = nil 206 | 207 | if let format = format, format == .png { 208 | data = image.pngData 209 | } 210 | else { 211 | data = image.jpegData 212 | } 213 | 214 | if let data = data { 215 | write(data: data, forKey: key) 216 | } 217 | } 218 | 219 | /// Read image for key. Please use this method to write an image instead of `readObject(forKey:)` 220 | public func readImage(forKey key: String) -> NSImage? { 221 | let data = readData(forKey: key) 222 | if let data = data { 223 | return NSImage(data: data) 224 | } 225 | 226 | return nil 227 | } 228 | 229 | @available(*, deprecated, message: "Please use `readImage(forKey:)` instead. This will be removed in the future.") 230 | public func readImageForKey(key: String) -> NSImage? { 231 | return readImage(forKey: key) 232 | } 233 | #endif 234 | } 235 | 236 | // MARK: - Utils 237 | 238 | extension DataCache { 239 | /// Check if has data for key 240 | public func hasData(forKey key: String) -> Bool { 241 | return hasDataOnDisk(forKey: key) || hasDataOnMem(forKey: key) 242 | } 243 | 244 | /// Check if has data on disk 245 | public func hasDataOnDisk(forKey key: String) -> Bool { 246 | return self.fileManager.fileExists(atPath: self.cachePath(forKey: key)) 247 | } 248 | 249 | /// Check if has data on mem 250 | public func hasDataOnMem(forKey key: String) -> Bool { 251 | return (memCache.object(forKey: key as AnyObject) != nil) 252 | } 253 | } 254 | 255 | // MARK: - Clean 256 | 257 | extension DataCache { 258 | 259 | /// Clean all mem cache and disk cache. This is an async operation. 260 | public func cleanAll() { 261 | cleanMemCache() 262 | cleanDiskCache() 263 | } 264 | 265 | /// Clean cache by key. This is an async operation. 266 | public func clean(byKey key: String) { 267 | memCache.removeObject(forKey: key as AnyObject) 268 | 269 | ioQueue.async { 270 | do { 271 | try self.fileManager.removeItem(atPath: self.cachePath(forKey: key)) 272 | } catch { 273 | print("DataCache: Error while remove file: \(error.localizedDescription)") 274 | } 275 | } 276 | } 277 | 278 | public func cleanMemCache() { 279 | memCache.removeAllObjects() 280 | } 281 | 282 | public func cleanDiskCache() { 283 | ioQueue.async { 284 | do { 285 | try self.fileManager.removeItem(atPath: self.cachePath) 286 | } catch { 287 | print("DataCache: Error when clean disk: \(error.localizedDescription)") 288 | } 289 | } 290 | } 291 | 292 | /// Clean expired disk cache. This is an async operation. 293 | @objc public func cleanExpiredDiskCache() { 294 | cleanExpiredDiskCache(completion: nil) 295 | } 296 | 297 | // This method is from Kingfisher 298 | /** 299 | Clean expired disk cache. This is an async operation. 300 | 301 | - parameter completionHandler: Called after the operation completes. 302 | */ 303 | open func cleanExpiredDiskCache(completion handler: (()->())? = nil) { 304 | 305 | // Do things in cocurrent io queue 306 | ioQueue.async { 307 | 308 | var (URLsToDelete, diskCacheSize, cachedFiles) = self.travelCachedFiles(onlyForCacheSize: false) 309 | 310 | for fileURL in URLsToDelete { 311 | do { 312 | try self.fileManager.removeItem(at: fileURL) 313 | } catch { 314 | print("DataCache: Error while removing files \(error.localizedDescription)") 315 | } 316 | } 317 | 318 | if self.maxDiskCacheSize > 0 && diskCacheSize > self.maxDiskCacheSize { 319 | let targetSize = self.maxDiskCacheSize / 2 320 | 321 | // Sort files by last modify date. We want to clean from the oldest files. 322 | let sortedFiles = cachedFiles.keysSortedByValue { 323 | resourceValue1, resourceValue2 -> Bool in 324 | 325 | if let date1 = resourceValue1.contentAccessDate, 326 | let date2 = resourceValue2.contentAccessDate 327 | { 328 | return date1.compare(date2) == .orderedAscending 329 | } 330 | 331 | // Not valid date information. This should not happen. Just in case. 332 | return true 333 | } 334 | 335 | for fileURL in sortedFiles { 336 | 337 | do { 338 | try self.fileManager.removeItem(at: fileURL) 339 | } catch { 340 | print("DataCache: Error while removing files \(error.localizedDescription)") 341 | } 342 | 343 | URLsToDelete.append(fileURL) 344 | 345 | if let fileSize = cachedFiles[fileURL]?.totalFileAllocatedSize { 346 | diskCacheSize -= UInt(fileSize) 347 | } 348 | 349 | if diskCacheSize < targetSize { 350 | break 351 | } 352 | } 353 | } 354 | 355 | DispatchQueue.main.async(execute: { () -> Void in 356 | handler?() 357 | }) 358 | } 359 | } 360 | } 361 | 362 | // MARK: - Helpers 363 | 364 | extension DataCache { 365 | 366 | // This method is from Kingfisher 367 | fileprivate func travelCachedFiles(onlyForCacheSize: Bool) -> (urlsToDelete: [URL], diskCacheSize: UInt, cachedFiles: [URL: URLResourceValues]) { 368 | 369 | let diskCacheURL = URL(fileURLWithPath: cachePath) 370 | let resourceKeys: Set = [.isDirectoryKey, .contentAccessDateKey, .totalFileAllocatedSizeKey] 371 | let expiredDate: Date? = (maxCachePeriodInSecond < 0) ? nil : Date(timeIntervalSinceNow: -maxCachePeriodInSecond) 372 | 373 | var cachedFiles = [URL: URLResourceValues]() 374 | var urlsToDelete = [URL]() 375 | var diskCacheSize: UInt = 0 376 | 377 | for fileUrl in (try? fileManager.contentsOfDirectory(at: diskCacheURL, includingPropertiesForKeys: Array(resourceKeys), options: .skipsHiddenFiles)) ?? [] { 378 | 379 | do { 380 | let resourceValues = try fileUrl.resourceValues(forKeys: resourceKeys) 381 | // If it is a Directory. Continue to next file URL. 382 | if resourceValues.isDirectory == true { 383 | continue 384 | } 385 | 386 | // If this file is expired, add it to URLsToDelete 387 | if !onlyForCacheSize, 388 | let expiredDate = expiredDate, 389 | let lastAccessData = resourceValues.contentAccessDate, 390 | (lastAccessData as NSDate).laterDate(expiredDate) == expiredDate 391 | { 392 | urlsToDelete.append(fileUrl) 393 | continue 394 | } 395 | 396 | if let fileSize = resourceValues.totalFileAllocatedSize { 397 | diskCacheSize += UInt(fileSize) 398 | if !onlyForCacheSize { 399 | cachedFiles[fileUrl] = resourceValues 400 | } 401 | } 402 | } catch { 403 | print("DataCache: Error while iterating files \(error.localizedDescription)") 404 | } 405 | } 406 | 407 | return (urlsToDelete, diskCacheSize, cachedFiles) 408 | } 409 | 410 | func cachePath(forKey key: String) -> String { 411 | let fileName = key.md5 412 | return (cachePath as NSString).appendingPathComponent(fileName) 413 | } 414 | } 415 | 416 | #if os(OSX) 417 | extension NSImage { 418 | var pngData: Data? { tiffRepresentation?.bitmap?.png } 419 | } 420 | 421 | extension NSImage { 422 | var jpegData: Data? { tiffRepresentation?.bitmap?.jpeg } 423 | } 424 | 425 | extension NSBitmapImageRep { 426 | var jpeg: Data? { representation(using: .jpeg, properties: [:]) } 427 | } 428 | 429 | extension NSBitmapImageRep { 430 | var png: Data? { representation(using: .png, properties: [:]) } 431 | } 432 | extension Data { 433 | var bitmap: NSBitmapImageRep? { NSBitmapImageRep(data: self) } 434 | } 435 | #endif 436 | -------------------------------------------------------------------------------- /Sources/Dictionary+Cache.swift: -------------------------------------------------------------------------------- 1 | // 2 | // Dictionary+Cache.swift 3 | // Pods 4 | // 5 | // Created by Nguyen Cong Huy on 7/12/16. 6 | // 7 | // 8 | 9 | import Foundation 10 | 11 | extension Dictionary { 12 | func keysSortedByValue(_ isOrderedBefore: (Value, Value) -> Bool) -> [Key] { 13 | return Array(self).sorted{ isOrderedBefore($0.1, $1.1) }.map{ $0.0 } 14 | } 15 | } 16 | -------------------------------------------------------------------------------- /Sources/String+MD5.swift: -------------------------------------------------------------------------------- 1 | // 2 | // String+MD5.swift 3 | // Kingfisher 4 | // 5 | // To date, adding CommonCrypto to a Swift framework is problematic. See: 6 | // http://stackoverflow.com/questions/25248598/importing-commoncrypto-in-a-swift-framework 7 | // We're using a subset and modified version of CryptoSwift as an alternative. 8 | // The following is an altered source version that only includes MD5. The original software can be found at: 9 | // https://github.com/krzyzanowskim/CryptoSwift 10 | // This is the original copyright notice: 11 | 12 | /* 13 | Copyright (C) 2014 Marcin Krzyżanowski 14 | This software is provided 'as-is', without any express or implied warranty. 15 | In no event will the authors be held liable for any damages arising from the use of this software. 16 | Permission is granted to anyone to use this software for any purpose,including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions: 17 | - The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation is required. 18 | - Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. 19 | - This notice may not be removed or altered from any source or binary distribution. 20 | */ 21 | 22 | import Foundation 23 | 24 | extension String { 25 | var md5: String { 26 | if let data = self.data(using: .utf8, allowLossyConversion: true) { 27 | 28 | let message = data.withUnsafeBytes { (bufferPointer) -> [UInt8] in 29 | return Array(bufferPointer) 30 | } 31 | 32 | let MD5Calculator = MD5(message) 33 | let MD5Data = MD5Calculator.calculate() 34 | 35 | let MD5String = NSMutableString() 36 | for c in MD5Data { 37 | MD5String.appendFormat("%02x", c) 38 | } 39 | return MD5String as String 40 | 41 | } else { 42 | return self 43 | } 44 | } 45 | } 46 | 47 | 48 | /** array of bytes, little-endian representation */ 49 | func arrayOfBytes(_ value: T, length: Int? = nil) -> [UInt8] { 50 | let totalBytes = length ?? (MemoryLayout.size * 8) 51 | 52 | let valuePointer = UnsafeMutablePointer.allocate(capacity: 1) 53 | valuePointer.pointee = value 54 | 55 | let bytes = valuePointer.withMemoryRebound(to: UInt8.self, capacity: totalBytes) { (bytesPointer) -> [UInt8] in 56 | var bytes = [UInt8](repeating: 0, count: totalBytes) 57 | for j in 0...size, totalBytes) { 58 | bytes[totalBytes - 1 - j] = (bytesPointer + j).pointee 59 | } 60 | return bytes 61 | } 62 | 63 | valuePointer.deinitialize(count: 1) 64 | valuePointer.deallocate() 65 | 66 | return bytes 67 | } 68 | 69 | extension Int { 70 | /** Array of bytes with optional padding (little-endian) */ 71 | func bytes(_ totalBytes: Int = MemoryLayout.size) -> [UInt8] { 72 | return arrayOfBytes(self, length: totalBytes) 73 | } 74 | 75 | } 76 | 77 | extension NSMutableData { 78 | 79 | /** Convenient way to append bytes */ 80 | func appendBytes(_ arrayOfBytes: [UInt8]) { 81 | append(arrayOfBytes, length: arrayOfBytes.count) 82 | } 83 | 84 | } 85 | 86 | protocol HashProtocol { 87 | var message: Array { get } 88 | 89 | /** Common part for hash calculation. Prepare header data. */ 90 | func prepare(_ len: Int) -> Array 91 | } 92 | 93 | extension HashProtocol { 94 | 95 | func prepare(_ len: Int) -> Array { 96 | var tmpMessage = message 97 | 98 | // Step 1. Append Padding Bits 99 | tmpMessage.append(0x80) // append one bit (UInt8 with one bit) to message 100 | 101 | // append "0" bit until message length in bits ≡ 448 (mod 512) 102 | var msgLength = tmpMessage.count 103 | var counter = 0 104 | 105 | while msgLength % len != (len - 8) { 106 | counter += 1 107 | msgLength += 1 108 | } 109 | 110 | tmpMessage += Array(repeating: 0, count: counter) 111 | return tmpMessage 112 | } 113 | } 114 | 115 | func toUInt32Array(_ slice: ArraySlice) -> Array { 116 | var result = Array() 117 | result.reserveCapacity(16) 118 | 119 | for idx in stride(from: slice.startIndex, to: slice.endIndex, by: MemoryLayout.size) { 120 | let d0 = UInt32(slice[idx.advanced(by: 3)]) << 24 121 | let d1 = UInt32(slice[idx.advanced(by: 2)]) << 16 122 | let d2 = UInt32(slice[idx.advanced(by: 1)]) << 8 123 | let d3 = UInt32(slice[idx]) 124 | let val: UInt32 = d0 | d1 | d2 | d3 125 | 126 | result.append(val) 127 | } 128 | return result 129 | } 130 | 131 | struct BytesIterator: IteratorProtocol { 132 | 133 | let chunkSize: Int 134 | let data: [UInt8] 135 | 136 | init(chunkSize: Int, data: [UInt8]) { 137 | self.chunkSize = chunkSize 138 | self.data = data 139 | } 140 | 141 | var offset = 0 142 | 143 | mutating func next() -> ArraySlice? { 144 | let end = min(chunkSize, data.count - offset) 145 | let result = data[offset.. 0 ? result : nil 148 | } 149 | } 150 | 151 | struct BytesSequence: Sequence { 152 | let chunkSize: Int 153 | let data: [UInt8] 154 | 155 | func makeIterator() -> BytesIterator { 156 | return BytesIterator(chunkSize: chunkSize, data: data) 157 | } 158 | } 159 | 160 | func rotateLeft(_ value: UInt32, bits: UInt32) -> UInt32 { 161 | return ((value << bits) & 0xFFFFFFFF) | (value >> (32 - bits)) 162 | } 163 | 164 | class MD5: HashProtocol { 165 | 166 | static let size = 16 // 128 / 8 167 | let message: [UInt8] 168 | 169 | init (_ message: [UInt8]) { 170 | self.message = message 171 | } 172 | 173 | /** specifies the per-round shift amounts */ 174 | private let shifts: [UInt32] = [7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22, 175 | 5, 9, 14, 20, 5, 9, 14, 20, 5, 9, 14, 20, 5, 9, 14, 20, 176 | 4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23, 177 | 6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21] 178 | 179 | /** binary integer part of the sines of integers (Radians) */ 180 | private let sines: [UInt32] = [0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, 181 | 0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501, 182 | 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be, 183 | 0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821, 184 | 0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa, 185 | 0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8, 186 | 0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed, 187 | 0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a, 188 | 0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c, 189 | 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70, 190 | 0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x4881d05, 191 | 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665, 192 | 0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039, 193 | 0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1, 194 | 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1, 195 | 0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391] 196 | 197 | private let hashes: [UInt32] = [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476] 198 | 199 | func calculate() -> [UInt8] { 200 | var tmpMessage = prepare(64) 201 | tmpMessage.reserveCapacity(tmpMessage.count + 4) 202 | 203 | // hash values 204 | var hh = hashes 205 | 206 | // Step 2. Append Length a 64-bit representation of lengthInBits 207 | let lengthInBits = (message.count * 8) 208 | let lengthBytes = lengthInBits.bytes(64 / 8) 209 | tmpMessage += lengthBytes.reversed() 210 | 211 | // Process the message in successive 512-bit chunks: 212 | let chunkSizeBytes = 512 / 8 // 64 213 | 214 | for chunk in BytesSequence(chunkSize: chunkSizeBytes, data: tmpMessage) { 215 | // break chunk into sixteen 32-bit words M[j], 0 ≤ j ≤ 15 216 | let M = toUInt32Array(chunk) 217 | assert(M.count == 16, "Invalid array") 218 | 219 | // Initialize hash value for this chunk: 220 | var A: UInt32 = hh[0] 221 | var B: UInt32 = hh[1] 222 | var C: UInt32 = hh[2] 223 | var D: UInt32 = hh[3] 224 | 225 | var dTemp: UInt32 = 0 226 | 227 | // Main loop 228 | for j in 0 ..< sines.count { 229 | var g = 0 230 | var F: UInt32 = 0 231 | 232 | switch j { 233 | case 0...15: 234 | F = (B & C) | ((~B) & D) 235 | g = j 236 | break 237 | case 16...31: 238 | F = (D & B) | (~D & C) 239 | g = (5 * j + 1) % 16 240 | break 241 | case 32...47: 242 | F = B ^ C ^ D 243 | g = (3 * j + 5) % 16 244 | break 245 | case 48...63: 246 | F = C ^ (B | (~D)) 247 | g = (7 * j) % 16 248 | break 249 | default: 250 | break 251 | } 252 | dTemp = D 253 | D = C 254 | C = B 255 | B = B &+ rotateLeft((A &+ F &+ sines[j] &+ M[g]), bits: shifts[j]) 256 | A = dTemp 257 | } 258 | 259 | hh[0] = hh[0] &+ A 260 | hh[1] = hh[1] &+ B 261 | hh[2] = hh[2] &+ C 262 | hh[3] = hh[3] &+ D 263 | } 264 | 265 | var result = [UInt8]() 266 | result.reserveCapacity(hh.count / 4) 267 | 268 | hh.forEach { 269 | let itemLE = $0.littleEndian 270 | result += [UInt8(itemLE & 0xff), UInt8((itemLE >> 8) & 0xff), UInt8((itemLE >> 16) & 0xff), UInt8((itemLE >> 24) & 0xff)] 271 | } 272 | return result 273 | } 274 | } 275 | --------------------------------------------------------------------------------