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Questions tagged [nsurlsessiondatatask]

See Apple documentation for Swift (URLSessionDataTask) and Objective C.

249 questions
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1 answer

Does NSURLSession for HTTP data task (NSURLSessionDataTask) runs in background thread or we will have to provide the queue?

I started to use NSURLSession by avoiding NSURLConnection now a days as it's a new and elegant API provided by Apple. Previously, I used to put call NSURLRequest in GCD block to execute it in background. Here is how I used to do in…
NSPratik
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14
votes
4 answers

Custom NSURLProtocol with NSURLSession

I'm trying to implement this tutorial which implements a custom NSURLProtocol with NSURLConnection. https://www.raywenderlich.com/76735/using-nsurlprotocol-swift It works as expected, but now that NSURLConnection is deprecated in iOS9, I'm trying to…
kupilot
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12
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2 answers

Pattern for retrying URLSession dataTask?

I'm fairly new to iOS/Swift development and I'm working on an app that makes several requests to a REST API. Here's a sample of one of those calls which retrieves "messages": func getMessages() { let endpoint = "/api/outgoingMessages" let…
bmt22033
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11
votes
4 answers

NSURLSessionDataTask timeout subsequent requests failing

I am creating a NSMutableRequest: self.req = [NSMutableURLRequest requestWithURL:myURL cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:10.0]; The timeout is set to be 10 seconds because I don't want the user to wait too long to get…
nicky_1525
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10
votes
1 answer

NSURLSession HTTP/2 memory leak

This My Test cases, point out that when using NSURLSession with a HTTP/2 connection there is memory problem. test1: iOS 9. HTTP/2 server I use NSURLSession to upload 10M file to a HTTP/2 server, if the file uploaded completed everything is ok, But…
rotoava
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8
votes
1 answer

Throw error from dataTask completionHandler

In swift how do I throw an error within a completion handler like this: let task = URLSession.shared.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) in do { //something …
Wayneio
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8
votes
4 answers

NSMutableURLRequest setTimeoutInterval not working in ios 11.0

I am using URL background session for pdf uploading as data stream, using ios version > 9.0. I am setting timeout interval of 300 sec. Its not working at all. After 10 seconds it gets timeout error. Piece of code is given below NSTimeInterval…
Warewolf
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7
votes
2 answers

How to sync serial queue for URLSession tasks?

Using XCode-8.2.1, Swift-3.0.2 and iOS-10.2.1, I am trying to call two different URLSession.shared.dataTasks (the first is a simple URL-request and the second is a POST-request). Since my first dataTask delivers a result that is needed in the…
iKK
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7
votes
3 answers

Get the size of an AVAssetDownloadTask before downloading

I'm currently implementing offline streaming with FairPlay streaming. Therefor I'm downloading streams using an AVAssetDownloadTask. I want to give the users feedback about the size of the download which starts to begin: Are you sure you want to…
Antoine
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6
votes
2 answers

NSURLSessionTask. Suspend does not work

This is what Apple's documentation says regarding suspend method of NSURLSessionTask class A task, while suspended, produces no network traffic and is not subject to timeouts. Ok. So I'm running the following simple code: let url =…
Andrey Chernukha
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5
votes
1 answer

How to tell the main thread that a URLSessionDataTask has finished

Using Swift 4, I have this code that attempts a POST request to a REST API: spinner.startAnimation(self) btnOk.isEnabled = false btnCancel.isEnabled = false attemptPost() spinner.stopAnimation(self) btnOk.isEnabled = true btnCancel.isEnabled =…
David Mordigal
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5
votes
4 answers

Network requests are failing - NSURLSession - App Sandbox - Xcode 9

I have a simple GET request that I am trying to run in my macOS application. However I keep getting the following error: A server with the specified hostname could not be found. The URL I am trying to download JSON data from…
Supertecnoboff
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5
votes
1 answer

Implementing completion handlers for backgroundSession.uploadTask

I have (almost) successfully implemented URLSessionDelegate, URLSessionTaskDelegate, and URLSessionDataDelegate so that I can upload my objects in the background. But I'm not sure how to implement completion handlers, so that I can delete the object…
Frederik
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5
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2 answers

iOS8: NSURLSession: NSURLSessionDataTask 'Client closed connection before receiving entire response'

I use iOS BACKGROUND FETCH n BACKGROUND TRANSFER to update our app. When we download an MP4 as part of a large download of lots of files the download can stop suddenly and get error: 'Client closed connection before receiving entire response' http…
brian.clear
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4
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1 answer

is session.dataTask asynchronous in swift?

I am making requests to my server using the following code: let configuration = URLSessionConfiguration.default let session = URLSession(configuration: configuration) let dataTask = session.dataTask(with: request as URLRequest) { (data, response,…
alionthego
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