CODEWITHSUNDEEP
iosnsurlsessioncombine
Palpatim
Palpatim

Reputation: 9262

Receive task progress from `URLSession.dataTaskPublisher`

It is possible to receive progress updates about a URLSessionTask by implementing the URLSessionDataDelegate.urlSession(_:dataTask:didReceive:) delegate method, and using the delegate-style "task, task.resume()" style of invocation.

With the Combine flavor of the API, this does not appear to be possible. Using URLSession.dataTaskPublisher(for:) returns a publisher that publishes the (Data, URLResponse) tuple upon completion, but never invokes the delegate method. In that way, it is very similar to the URLSession.dataTask(with:completionHandler:) method, which invokes completionHandler with the final result, and not in-process Progress reports.

Am I missing any API or pattern to allow progress reporting, or does the Combine flavor of URLSession task handling not offer a way to retrieve progress?

Upvotes: 1

Views: 1060

Answers (1)

matt
matt

Reputation: 534893

No, you're not missing anything. To retrieve the progress information you would need to construct your own Future and not use the built-in data task publisher.

Upvotes: 5

Related Questions