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Fetching strategies - Do not fetch redundant data. ETags, Lastmodified, own API? Recommendations, practice?
I am developing an Xcode app with a job feed, with profile view, with chat eg. I fetch using federatet queries to my microservices thru Apollo Router. Infront of the Apollo Router i Have a Kong that adds a X user ID, that the microservices use for personalized feed and other user info. The info is stored with SwiftData. My thought is that i should add a better way of controlling when i need to fetch. I have a “lastupdateAPI” with different entities (profile, profile picture eg). So when nothing has changed we do not fetch. But rather then using a own API for this, isnt ETag better? Or is it any other recommendations with Xcode Swiftui. Good strategies for not fetching what i already have?
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766
Feb ’25
modelContext.fetch() hits assert on release builds, but not on debug builds
Exact same app works fine in debug builds, but on release builds I see this stacktrace indicating that assert() was hit. Incident Identifier: *** Distributor ID: com.apple.TestFlight Hardware Model: iPhone14,3 Process: AuditOS [67847] Path: /private/var/containers/Bundle/Application/*** Identifier: *** Version: 1.0 (15) AppStoreTools: 16C5031b AppVariant: 1:iPhone14,3:18 Beta: YES Code Type: ARM-64 (Native) Role: Foreground Parent Process: launchd [1] Coalition: *** Date/Time: 2025-02-11 12:37:54.7801 -0600 Launch Time: 2025-02-11 12:37:33.1737 -0600 OS Version: iPhone OS 18.3 (22D63) Release Type: User Baseband Version: 4.20.03 Report Version: 104 Exception Type: EXC_BREAKPOINT (SIGTRAP) Exception Codes: 0x0000000000000001, 0x000000019d388e2c Termination Reason: SIGNAL 5 Trace/BPT trap: 5 Terminating Process: exc handler [67847] Triggered by Thread: 0 Thread 0 Crashed: 0 libswiftCore.dylib 0x000000019d388e2c _assertionFailure(_:_:file:line:flags:) + 264 (AssertCommon.swift:147) 1 SwiftData 0x0000000261842e04 Schema.KeyPathCache.validateAndCache(keypath:on:) + 2628 (Schema.swift:0) 2 SwiftData 0x000000026178cac4 static PersistentModel.keyPathToString(keypath:) + 360 (DataUtilities.swift:36) 3 SwiftData 0x000000026184c9e4 static PersistentModel.fetchDescriptorKeyPathString(for:) + 36 (FetchDescriptor.swift:51) 4 SwiftData 0x00000002617b9770 closure #1 in PredicateExpressions.KeyPath.convert(state:) + 172 (FetchDescriptor.swift:458) 5 SwiftData 0x00000002617b7f48 PredicateExpressions.KeyPath.convert(state:) + 352 (FetchDescriptor.swift:438) 6 SwiftData 0x00000002617bb7ec protocol witness for ConvertibleExpression.convert(state:) in conformance PredicateExpressions.KeyPath<A, B> + 16 (<compiler-generated>:0) 7 SwiftData 0x00000002617baaa0 PredicateExpression.convertToExpressionOrPredicate(state:) + 716 (FetchDescriptor.swift:219) 8 SwiftData 0x00000002617ba6dc PredicateExpression.convertToExpression(state:) + 32 (FetchDescriptor.swift:237) 9 SwiftData 0x00000002617b7cfc PredicateExpressions.Equal.convert(state:) + 328 (:-1) 10 SwiftData 0x00000002617bba08 protocol witness for ConvertibleExpression.convert(state:) in conformance PredicateExpressions.Equal<A, B> + 64 (<compiler-generated>:0) 11 SwiftData 0x00000002617baaa0 PredicateExpression.convertToExpressionOrPredicate(state:) + 716 (FetchDescriptor.swift:219) 12 SwiftData 0x00000002617b7abc PredicateExpression.convertToPredicate(state:) + 28 (FetchDescriptor.swift:244) 13 SwiftData 0x00000002617b7190 nsFetchRequest<A>(for:in:) + 1204 (FetchDescriptor.swift:64) 14 SwiftData 0x0000000261783358 DefaultStore.fetch<A>(_:) + 292 (DefaultStore.swift:496) 15 SwiftData 0x000000026178322c protocol witness for DataStore.fetch<A>(_:) in conformance DefaultStore + 16 (<compiler-generated>:0) 16 SwiftData 0x00000002617847fc asDataStore #1 <A><A1>(_:) in closure #1 in ModelContext.fetch<A>(_:) + 3152 (ModelContext.swift:2590) 17 SwiftData 0x00000002617a74d8 partial apply for closure #1 in ModelContext.fetch<A>(_:) + 100 (<compiler-generated>:0) 18 SwiftData 0x00000002617a7438 closure #1 in ModelContext.enumerateFetchableStores<A>(_:_:) + 208 (ModelContext.swift:2527) 19 SwiftData 0x00000002617a731c specialized ModelContext.enumerateFetchableStores<A>(_:_:) + 200 (ModelContext.swift:2522) 20 SwiftData 0x00000002617a6f08 ModelContext.fetch<A>(_:) + 144 (ModelContext.swift:2534) 21 SwiftData 0x00000002617a6e70 dispatch thunk of ModelContext.fetch<A>(_:) + 56 (:-1) 22 AuditOS 0x00000001041af3f4 0x10419c000 + 78836 23 AuditOS 0x00000001041bebd5 0x10419c000 + 142293 24 AuditOS 0x00000001041bbbf5 0x10419c000 + 130037 25 AuditOS 0x00000001041d8be5 0x10419c000 + 248805 26 AuditOS 0x00000001041bde6d 0x10419c000 + 138861 27 libswift_Concurrency.dylib 0x00000001aa6bfe39 completeTaskWithClosure(swift::AsyncContext*, swift::SwiftError*) + 1 (Task.cpp:497) The code in question looks like this: func addRecord<T: MyDtoProtocol>(_ someDTO: T) async throws { var zone: ZoneModel? = nil let recordName = someDTO.recordNameType let fetchDescriptor = FetchDescriptor<T.ModelType> (predicate: #Predicate {$0.recordName == recordName}) > var localEntitites: [T.ModelType] = try modelContext.fetch(fetchDescriptor) <---- I have isolated crash to this line. Basically for each swiftdata model type I have associatedType for Data Transfer Object type and vice versa.
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898
Feb ’25
New features for APNs token authentication now available
Team-scoped keys introduce the ability to restrict your token authentication keys to either development or production environments. Topic-specific keys in addition to environment isolation allow you to associate each key with a specific Bundle ID streamlining key management. For detailed instructions on accessing these features, read our updated documentation on establishing a token-based connection to APNs.
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1.8k
Feb ’25
Universal link not working
I’m seeking guidance on an issue with my iOS app’s universal link for email verification. The link successfully opens my app, but the verification logic never runs. Here is my setup and the problem details: Associated Domains & AASA I have Associated Domains set to applinks:talkio.me in Xcode. The AASA file is located at https://talkio.me/.well-known/apple-app-site-association with the following contents: { "applinks": { "apps": [], "details": [ { "appID": "VMCWZ2A2KQ.com.elbaba.Flake2", "paths": [ "/verify*" ] } ] } } The direct link we send in the email looks like: https://talkio.me/verify?mode=verifyEmail&oobCode=XYZ&apiKey=ABC When tapped, the app launches, but the universal link handler code below never logs the URL nor triggers the verifyEmailUsing logic. SceneDelegate Logic In my SceneDelegate.swift, I handle universal links in both scene(:willConnectTo:options:) and scene(:continue:userActivity:restorationHandler:): func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) { // ... if let urlContext = connectionOptions.urlContexts.first { let url = urlContext.url print("SceneDelegate: App launched with URL: (url.absoluteString)") handleUniversalLink(url: url) } } func scene(_ scene: UIScene, continue userActivity: NSUserActivity, restorationHandler: @escaping ([UIUserActivityRestoring]?) -> Void) -> Bool { print("⚠️ scene(_:continue:) got called!") guard let url = userActivity.webpageURL else { print("No webpageURL in userActivity.") return false } print("SceneDelegate: Universal Link => (url.absoluteString)") handleUniversalLink(url: url) return true } private func handleUniversalLink(url: URL) { let urlString = url.absoluteString if let oobCode = getQueryParam(urlString, named: "oobCode") { verifyEmailUsing(oobCode) } else { print("No oobCode found => not a verify link.") } } // ... Expected Log: SceneDelegate: App launched with URL: https://talkio.me/verify?mode=verifyEmail&oobCode=XYZ&apiKey=ABC However, I only see: SceneDelegate: sceneDidBecomeActive called No mention of the universal link is printed. Result: The app opens on tapping the link but does not call handleUniversalLink(...). Consequently, Auth.auth().checkActionCode(oobCode) and Auth.auth().applyActionCode(oobCode) are never triggered. What I Tried: Verified the AASA file is served over HTTPS, with content type application/json. Reinstalled the app to refresh iOS’s associated domain cache. Confirmed my Team ID (VMCWZ2A2KQ) and Bundle ID (com.elbaba.Flake2) match in the app’s entitlements. Confirmed the link path "/verify*" matches the link structure in emails. Despite these checks, the universal link logic is not invoked. Could you help me identify why the link is not recognized as a universal link and how to ensure iOS calls my SceneDelegate methods with the correct URL? Any guidance on diagnosing or resolving this universal link issue would be greatly appreciated.
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1.1k
Feb ’25
Core Data Light Migration Crash When Widget is Installed (Error 134100)
I'm experiencing a crash during a lightweight Core Data migration when a widget that accesses the same database is installed. The migration fails with the following error: CoreData: error: addPersistentStoreWithType:configuration:URL:options:error: returned error NSCocoaErrorDomain (134100) error: userInfo: CoreData: error: userInfo: error: metadata : { NSPersistenceFrameworkVersion = 1414; NSStoreModelVersionChecksumKey = "dY78fBnnOm7gYtb+QT14GVGuEmVlvFSYrb9lWAOMCTs="; NSStoreModelVersionHashes = { Entity1 = { ... }; Entity2 = { ... }; Entity3 = { ... }; Entity4 = { ... }; Entity5 = { ... }; }; NSStoreModelVersionHashesDigest = "aOalpc6zSzr/VpduXuWLT8MLQFxSY4kHlBo/nuX0TVQ/EZ+MJ8ye76KYeSfmZStM38VkyeyiIPf4XHQTMZiH5g=="; NSStoreModelVersionHashesVersion = 3; NSStoreModelVersionIdentifiers = ( "" ); NSStoreType = SQLite; NSStoreUUID = "9AAA7AB7-18D4-4DE4-9B54-893D08FA7FC4"; "_NSAutoVacuumLevel" = 2; } The issue occurs only when the widget is installed. If I remove the widget’s access to the Core Data store, the migration completes successfully. The crash happens only once—after the app is restarted, everything works fine. This occurs even though I'm using lightweight migration, which should not require manual intervention. My suspicion is that simultaneous access to the Core Data store by both the main app and the widget during migration might be causing the issue. Has anyone encountered a similar issue? Is there a recommended way to ensure safe migration while still allowing the widget to access Core Data? Any insights or recommendations would be greatly appreciated.
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736
Feb ’25
iOS not calling my Quick Look extension for RAW files recognized by the system
I'm the developer of Camera RawX (avail on the Mac App Store). I'm working on Camera RawX for iOS to provide Quick Look support for camera RAW files not supported by iOS. I use the Files app to open a RAW file to invoke Quick Look on my iPad (it is running iOS 17.6.1). The RAW file in question is a Fuji compressed RAF file. When I tap on the RAF file, iOS opens the Quick Look window, but my app's Quick Look extension is not called. If the RAW file in question is a Sigma Foveon X3F file, a file that has no native Apple RAW support, then my Quick Look extension is called and I'm able to display the image in the Quick Look window without issue. It seems that a system recognized RAW file extension (RAF in this case), is not triggering my Quick Look extension. On the macOS, this works fine without any issue. The strange thing is that my Thumbnail extension is being called when the RAW files show up in Files. Even if it is a RAF file. So it seems like a bug to me or am I missing something crucial in my Info.plist file? Albert
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855
Feb ’25
Fails to capture IOUSBHostInterface with macOS 15.3 despite root privileges in app
I have an app that captures USB storage device and sends some commands to it. The app has a privilege helper tool which captures the USB device. Everything was working fine upto macOS 15.2 but it 15.3 update broke the functionality. When the helper tool tries to capture the USB device, it is able to capture IOUSBHostDevice but fails to capture IOUSBHostInterface. The error is Code: 3758097097; Domain: IOUSBHostErrorDomain; Description: Failed to create IOUSBHostInterface.; Reason: Failed [super init] I have verified the UID, EUID, GID, EGID = 0 for the helper process. So by IOUSBHost documentation it should have worked. The code that cause the error inside the helper tool is func captureUSBInterface(interface: io_service_t) -> IOUSBHostInterface? { let queue = DispatchQueue(label: "com.example.usbdevice.queue2") var capturedInterface: IOUSBHostInterface? do { capturedInterface = try IOUSBHostInterface(__ioService: interface, options: .deviceCapture, queue: queue, interestHandler: nil) } catch { NSLog("Failed to capture USB interface: \(error)") return nil } return capturedInterface } The app has sandbox=False and is distributed outside of the App Store. Please advise (long-term, short-term solutions) on how to make this work.
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560
Feb ’25
Refresh Widget doesn't work from background push notification.
As stated in other posts like: https://developer.apple.com/forums/thread/734488 https://developer.apple.com/forums/thread/652946?answerId=823555022#823555022 Even though the recommended way from Apple documentation is to use push notifications to reload widgets timelines calling WidgetCenter.shared.reloadAllTimelines(), it is unreliable and I couldn't find a pattern of why it works 10% of times and not the other 90%. While the debugger is connected to the App it always works though. My widget needs to reflect updated information otherwise it becomes useless since it display smart home devices states such as the Apple Home widget does as well.
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365
Feb ’25
StoreKit 2.0 keep throwing unknown error.
After the release of StoreKit 2.0, the in-app purchase failure rate increased by 63.19%, with the majority of errors being StoreKitError.unknown. When encountering this error, many users repeatedly attempt to make a purchase, but the outcome remains unchanged, resulting in the same unknown error. In some cases, users who wait approximately 2 minutes before retrying the purchase may either succeed or encounter the following error: “StoreKit.StoreKitError.systemError(Error Domain=NSCocoaErrorDomain Code=4097 "connection to service named com.apple.storekitd”)”. This issue has directly impacted our app's purchasing flow. Because our app only displays the promotional purchase offer once, these issues have significantly reduced the number of users successfully completing the offer. As a result, the conversion rate for this promotion has dropped well below expectations, negatively impacting our business metrics.
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1.8k
Feb ’25
local network access dialogue does not appear when launching binary from swift package from xcode
Reproduce: Download live-caller-id-lookup-example Add let url = URL(string: "http://another-macbook.local:80")! let task = URLSession.shared.dataTask(with: url) {(data, response, error) in guard let data = data else { return } print(String(data: data, encoding: .utf8)!) } task.resume() anywhere in the code run PIRService target in xcode Result: no dialogue, host is unreachable Works fine when launching same binary from terminal
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411
Feb ’25
Behavior of Pending Receive Callbacks on Canceled NWConnection (UDP) Registered to Custom Serial Dispatch Queue
Hi Everyone, I’m working on a communication system for my app using NWConnection with the UDP protocol. The connection is registered to a custom serial dispatch queue. However, I’m trying to understand what the behavior will be in a scenario where the connection is canceled while there are still pending receive operations in progress. Scenario Overview: The sender is transmitting n = 100 packets to the receiver, out of which 40 packets have already been sent (i.e., delivered to the Receiver). The receiver has posted m = 20 pending receive operations, where each receive operation is responsible for handling one packet. The receiver has already successfully processed x = 10 packets. At the time of cancellation, the receiver’s buffer still holds m = 20 packets that are pending for processing, and k = 10 pending receive callbacks are in the dispatch queue, waiting to be executed. At same time when the 10th packet was processed another thread triggers .cancel() on this accepted NWConnection (on the receiver side), I need to understand the impact on the pending receive operations and their associated callbacks. My Questions: What happens to the k = 10 pending receive callbacks that are in the dispatch queue waiting to be triggered when the connection is canceled? Will these callbacks complete successfully and process the data? Or, because the connection is canceled, will they complete with failure? What happens to the remaining pending receive operations that were initiated but have not yet been scheduled in the dispatch queue? For the pending receive operations that were already initiated (i.e., the network stack is waiting to receive the data, but the callback hasn’t been scheduled yet), will they fail immediately when the connection is canceled? Or is there any chance that the framework might still process these receives before the cancellation fully takes effect?
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326
Feb ’25
Input required on choice of HTTPS server stack on Apple Platforms for programmatic integration
We have a requirement to create a production quality application that also acts as HTTPS server for certain communication. The preference is for the server to support HTTP/1.1, HTTP/2 and HTTP/3 communication asynchronously, though not mandatory to support all the HTTP versions. Wanted to get the guidance, on which stack should be used, that is most reliable and that gives the maximum long term compatibility, sustainability and reliability. What is the recommended 'in-built' or 'available by default' stack on Apple Platform ? For HTTPS on HTTP/1.1 with synchronous mode operations ? For HTTPS on HTTP/1.1 with asynchronous mode operations ? For HTTPS on HTTP/2 with synchronous mode operations ? For HTTPS on HTTP/2 with asynchronous mode operations ? For HTTPS on HTTP/3 with asynchronous mode operations ? For HTTPS on HTTP/1.1 + HTTP/2 with synchronous mode operations ? For HTTPS on HTTP/1.1 + HTTP/2 with asynchronous mode operations ? For HTTPS on HTTP/1.1 + HTTP/2 + HTTP/3 with asynchronous mode operations ? What the generally recommended server stack that a typical application uses whether 'in-built' or 'available by default on Apple ' or 'not-available by default on Apple' stack. From the available stacks , we tried to evaluate the below stacks: https://opensource.apple.com/projects/swiftnio/ : We understand that while it’s not preinstalled as part of Apple's OSes, it is an official Swift package supported by Apple and can easily be added to your project. At the moment it supports HTTP/1.1 and HTTP/2. The link https://github.com/apple/swift-nio/issues/1730says that HTTP/3 will get added in the future. Is there any other HTTPS stack (built-in or third-party) that is recommended to the used on Apple's platform ? Our application is expected to be working on macOS, iOS, iPadOS, tvOS and watchOS. We understand that macOS also includes Apache HTTPD server. As our application is not primarily a Web Server (and also supports other protocols both in client and server mode), it looks integrating HTTPS directly into the application using a lightweight HTTP library with SSL/TLS support is a better option, in place of Apache HTTPD. From the document we know that swift-nio uses BoringSSL (swift-nio-ssl) which is prepackaged along with the swift-nio library, and it does not use the default Secure Transport. What is the reason being not using Secure Transport ? Now does it become the responsibility of the application using swift-nio to take care of updating BoringSSL with the patches.
1
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306
Feb ’25
Default payment method option bug?
Hi team at Apple, here is a scenario we came across: The order of priority of payment methods in Apple Wallet follows: Credit Debit Apple Cash Our app displays a payment sheet that excludes credit cards. Instead of a debit card, the default payment option shown to the user on the payment sheet is Apple Cash. Is this a known issue or have we configured something wrong in our end?
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300
Feb ’25
CarPlay style API
Is there any way I can get updates when I change CarPlay style settings? I've tried CPSessionConfigurationDelegate.contentStyleChanged and CPTemplateApplicationSceneDelegate.contentStyleDidChange, but they always produce the same result. When I choose: Automatic -> I receive light in case of daylight; Always Dark and Always Show Dark Map toggle on -> dark Always Dark and Always Show Dark Map toggle off -> light. But it seems to be wrong, b/c CarPlay's toolbar is still dark, and I receive light. Is there a way to get a dark style when choosing Always Dark and Always Show Dark Map toggle off? Or at least get updates when the Always Show Dark Map toggle changes?
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312
Feb ’25
UE 5.4 Game Instantly Crash on iOS devices on Testflight
Hi, I'm working on a game for the past few years using first Unreal Engine 4, and now Unreal Engine 5.4.4. I'm experiencingan unusual crash on startup on some devices . The crash is so fast that I'm barely able to see the launching screen sometimes because the app closes itself before that. I got a EXC_CRASH (SIGABRT) so I know that it's a null pointer reference, but I can't quite wrap my head about the cause, I think that's something messed up in the packaging of the app, but here is where I'm blocked, I'm not that accustomed with apple devices. If someone has some advise to give, please, any help will be very valuable. Many thanks. Log : Crash Log on Ipad
0
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560
Feb ’25
Time verification in iOS 18+
We built a time verification feature as part of our iPadOS/iOS app where recording an accurate timestamp is part of a core feature of ours. We want to maintain integrity of recorded data, but our app must still be able to operate offline. To accomplish this, we established a baseline between the device's internal clock (CLOCK_MONOTONIC_RAW) and our servers via an initial network request. Once that baseline is established, we can reliably calculate the true time, or detect when a user may have tampered their device's time, especially while offline. Of course, this baseline falls apart after the device reboots. We have been using kern.bootsessionuuid locally to detect when a device has rebooted so we know to wipe the baseline and try to establish a new one. Unfortunately (I'm sure due to issues with device fingerprinting), Apple has removed access to kern.bootsessionuuid in iOS 18, silently and without warning. This has compromised the integrity of our feature. https://developer.apple.com/documentation/ios-ipados-release-notes/ios-ipados-18-release-notes#Deprecations Is there any other way that our app can detect or be notified that a device reboot has occurred? Alternatively, Google has just provided a "TrustedTime" API that looks to do the heavy lifting for what we have been solving ourselves. Would it be possible for Apple to provide a similar API? https://android-developers.googleblog.com/2025/02/trustedtime-api-introducing-reliable-approach-to-time-keeping-for-apps.html We would appreciate any guidance here. Thanks!
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414
Feb ’25
The options and position arguments do not work in the 'entriesEnumeratorWithOptions:position:predicate:error:' method of the OSLogStore object.
When I set the option parameter to OSLogEnumeratorReverse, the iteration order of OSLogEnumerator is still from front to back in time When I set the options parameter to 0 and the position parameter to the first 5 seconds of the current time, OSLogEnumerator can still iterate over the previous 5 seconds #import "ViewController.h" #import <OSLog/OSLog.h> @interface ViewController () @property(strong, nonatomic)OSLogStore *logStore; @property(strong, nonatomic)NSDateFormatter *formatter; @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; NSError *err = nil; self.logStore = [OSLogStore storeWithScope:OSLogStoreCurrentProcessIdentifier error:&err]; if (!self.logStore || err) { NSLog(@"error: %@", err); NSAssert(0, @""); } self.formatter = [[NSDateFormatter alloc] init]; [self.formatter setDateFormat:@"[yyyy-MM-dd HH:mm:ss:SSS]"]; } - (IBAction)addLog:(id)sender { static int i = 0; NSLog(@"[test] %@ this is a log with index:%d", [self.formatter stringFromDate:[NSDate date]], i++); } - (IBAction)printLogWithReverse:(id)sender { NSError *err = nil; NSPredicate *preeicate = [NSPredicate predicateWithFormat:@"composedMessage contains %@" argumentArray:@[@"[test]"]]; OSLogEnumerator *enumer = [self.logStore entriesEnumeratorWithOptions:OSLogEnumeratorReverse position:nil predicate:preeicate error:&err]; if (err) { NSLog(@"enumer error:%@", err); NSAssert(0, @""); } OSLogEntryLog *entry = nil; while (entry = [enumer nextObject]) { NSString *message = [entry composedMessage]; printf("log: %s\n", message.UTF8String); } } - (IBAction)printLogWithPosition:(id)sender { NSError *err = nil; NSPredicate *preeicate = [NSPredicate predicateWithFormat:@"composedMessage contains %@" argumentArray:@[@"[test]"]]; NSDate *posDate = [NSDate dateWithTimeIntervalSinceNow:-5]; OSLogPosition *pos = [self.logStore positionWithDate:posDate]; OSLogEnumerator *enumer = [self.logStore entriesEnumeratorWithOptions:0 position:pos predicate:preeicate error:&err]; if (err) { NSLog(@"enumer error:%@", err); NSAssert(0, @""); } const char *now = [self.formatter stringFromDate:[NSDate date]].UTF8String; const char *posStart = [self.formatter stringFromDate:posDate].UTF8String; OSLogEntryLog *entry = nil; while (entry = [enumer nextObject]) { NSString *message = [entry composedMessage]; printf("log(now:%s, pos:%s): %s\n", now, posStart, message.UTF8String); } } @end The method of - (IBAction)printLogWithReverse:(id)sender print result not reversed by time. log: [test] [2025-02-18 17:35:50:175] this is a log with index:0 log: [test] [2025-02-18 17:35:51:040] this is a log with index:1 log: [test] [2025-02-18 17:35:51:174] this is a log with index:2 log: [test] [2025-02-18 17:35:51:323] this is a log with index:3 log: [test] [2025-02-18 17:35:51:473] this is a log with index:4 log: [test] [2025-02-18 17:35:51:640] this is a log with index:5 log: [test] [2025-02-18 17:35:51:773] this is a log with index:6 log: [test] [2025-02-18 17:35:51:923] this is a log with index:7 The method of - (IBAction)printLogWithPosition:(id) print result should not contain the log from 5 seconds ago because I set the start time position in the position argument [test] [2025-02-18 17:43:58:741] this is a log with index:0 [test] [2025-02-18 17:43:58:940] this is a log with index:1 [test] [2025-02-18 17:43:59:458] this is a log with index:2 [test] [2025-02-18 17:43:59:923] this is a log with index:3 log(now:[2025-02-18 17:44:51:132], pos:[2025-02-18 17:44:46:032]): [test] [2025-02-18 17:43:58:741] this is a log with index:0 log(now:[2025-02-18 17:44:51:132], pos:[2025-02-18 17:44:46:032]): [test] [2025-02-18 17:43:58:940] this is a log with index:1 log(now:[2025-02-18 17:44:51:132], pos:[2025-02-18 17:44:46:032]): [test] [2025-02-18 17:43:59:458] this is a log with index:2 log(now:[2025-02-18 17:44:51:132], pos:[2025-02-18 17:44:46:032]): [test] [2025-02-18 17:43:59:923] this is a log with index:3
1
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400
Feb ’25
Push notifications to api.push.apple.com sometimes fail
We have a case when we send 8 push notifications more or less simultaneously over 1 HTTP 2.0 connection. Using .NET Core 8 Sometimes some of them fail with a strange message: System.Net.Http.HttpRequestException: The response ended prematurely while waiting for the next frame from the server. (ResponseEnded) ---> System.Net.Http.HttpIOException: The response ended prematurely while waiting for the next frame from the server. (ResponseEnded) at System.Net.Http.Http2Connection.ThrowRequestAborted(Exception innerException) at System.Net.Http.Http2Connection.Http2Stream.TryEnsureHeaders() at System.Net.Http.Http2Connection.Http2Stream.ReadResponseHeadersAsync(CancellationToken cancellationToken) at System.Net.Http.Http2Connection.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken) --- End of inner exception stack trace --- at System.Net.Http.Http2Connection.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken) at System.Net.Http.HttpConnectionPool.SendWithVersionDetectionAndRetryAsync(HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken) at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken) at System.Net.Http.DecompressionHandler.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken) at Microsoft.Extensions.Http.Logging.HttpClientLoggerHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) We noticed that failure is always accompanied with a huge delay (~500ms) comparing to success (~20ms). Also some of the burst messages are sent successfully (sometimes 2-4 of them) What can we do about it?
2
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507
Feb ’25