While updating my application to support Background App Refresh I ran into problem with AFNetworking.
I am getting NSPOSIXErrorDomain Code=53 "Software caused connection abort". The problem seems to occur in iOS 12, where the background connection gets terminated.
AFNetworking 2.6.3 is used to make the fetch.
AppDelegate.m:
- (void)application:(UIApplication *)application performFetchWithCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler {
[OrdersService performFetch];
completionHandler(UIBackgroundFetchResultNewData);
}
OrdersService.m:
-(void) performFetch {
[[AFHTTPRequestOperationManager new] GET:@"https://www.example.com/orders"
parameters:nil
success:^(AFHTTPRequestOperation *operation, id responseObject) {
}
failure:^(AFHTTPRequestOperation *operation, NSError *error) {
}
];
}
Console output:
[Error] GET '(null)' (0) [31.9163 s]: Error Domain=NSPOSIXErrorDomain Code=53 "Software caused connection abort" UserInfo={NSErrorFailingURLStringKey=https://www.example.com/orders, _kCFStreamErrorDomainKey=1, NSErrorPeerAddressKey={length = 16, capacity = 16, bytes = 0x100201bb3e80187c0000000000000000}, _kCFStreamErrorCodeKey=53, NSErrorFailingURLKey=https://www.example.com/orders}
Starting the fetch as background task with 0.1 sec delay solved the problem:
-(void) performFetch {
__block UIBackgroundTaskIdentifier bgTask = [[UIApplication sharedApplication] beginBackgroundTaskWithName:@"GET /orders" expirationHandler:^{
// EXPIRED
[[UIApplication sharedApplication] endBackgroundTask:bgTask];
bgTask = UIBackgroundTaskInvalid;
}];
// Start the long-running task and return immediately.
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 0.1 * NSEC_PER_SEC), dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
// Do the work associated with the task, preferably in chunks.
[[AFHTTPRequestOperationManager new] GET:@"https://www.example.com/orders"
parameters:nil
success:^(AFHTTPRequestOperation *operation, id responseObject) {
// SUCCESS
[[UIApplication sharedApplication] endBackgroundTask:bgTask];
bgTask = UIBackgroundTaskInvalid;
}
failure:^(AFHTTPRequestOperation *operation, NSError *error) {
// FAILURE
[[UIApplication sharedApplication] endBackgroundTask:bgTask];
bgTask = UIBackgroundTaskInvalid;
}
];
});
}