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Merge pull request #347 from ronaldheft/ios-bg-downloads

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feat: Handle iOS background downloads
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advplyr 2022-08-31 15:00:20 -05:00 committed by GitHub
commit defd895995
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2 changed files with 21 additions and 1 deletions
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7
ios/App/App/AppDelegate.swift
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@ -6,6 +6,7 @@ import RealmSwift
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
var backgroundCompletionHandler: (() -> Void)?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
@ -72,6 +73,12 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
// tracking app url opens, make sure to keep this call
return ApplicationDelegateProxy.shared.application(application, continue: userActivity, restorationHandler: restorationHandler)
}
func application(_ application: UIApplication, handleEventsForBackgroundURLSession identifier: String, completionHandler: @escaping () -> Void) {
// Stores the completion handler for background downloads
// The identifier of this method can be ignored at this time as we only have one background url session
backgroundCompletionHandler = completionHandler
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesBegan(touches, with: event)

15
ios/App/App/plugins/AbsDownloader.swift
View file

@ -15,9 +15,10 @@ public class AbsDownloader: CAPPlugin, URLSessionDownloadDelegate {
static private let downloadsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
private lazy var session: URLSession = {
let config = URLSessionConfiguration.background(withIdentifier: "AbsDownloader")
let queue = OperationQueue()
queue.maxConcurrentOperationCount = 5
return URLSession(configuration: .default, delegate: self, delegateQueue: queue)
return URLSession(configuration: config, delegate: self, delegateQueue: queue)
}()
private let progressStatusQueue = DispatchQueue(label: "progress-status-queue", attributes: .concurrent)
private var downloadItemProgress = [String: DownloadItem]()
@ -78,6 +79,18 @@ public class AbsDownloader: CAPPlugin, URLSessionDownloadDelegate {
}
}
// Called when downloads are complete on the background thread
public func urlSessionDidFinishEvents(forBackgroundURLSession session: URLSession) {
DispatchQueue.main.async {
guard let appDelegate = UIApplication.shared.delegate as? AppDelegate,
let backgroundCompletionHandler =
appDelegate.backgroundCompletionHandler else {
return
}
backgroundCompletionHandler()
}
}
private func handleDownloadTaskUpdate(downloadTask: URLSessionTask, progressHandler: DownloadProgressHandler) {
do {
guard let downloadItemPartId = downloadTask.taskDescription else { throw LibraryItemDownloadError.noTaskDescription }