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[5.3] improve URLError returned upon task cancellation #2844

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Merged
merged 1 commit into from
Jul 17, 2020
Merged

[5.3] improve URLError returned upon task cancellation #2844

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15 changes: 12 additions & 3 deletions Sources/FoundationNetworking/URLSession/URLSessionTask.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -364,11 +364,20 @@ open class URLSessionTask : NSObject, NSCopying {
*/
open func cancel() {
workQueue.sync {
guard self.state == .running || self.state == .suspended else { return }
self.state = .canceling
let canceled = self.syncQ.sync { () -> Bool in
guard self._state == .running || self._state == .suspended else { return true }
self._state = .canceling
return false
}
guard !canceled else { return }
self._getProtocol { (urlProtocol) in
self.workQueue.async {
let urlError = URLError(_nsError: NSError(domain: NSURLErrorDomain, code: NSURLErrorCancelled, userInfo: nil))
var info = [NSLocalizedDescriptionKey: "\(URLError.Code.cancelled)" as Any]
if let url = self.originalRequest?.url {
info[NSURLErrorFailingURLErrorKey] = url
info[NSURLErrorFailingURLStringErrorKey] = url.absoluteString
}
let urlError = URLError(_nsError: NSError(domain: NSURLErrorDomain, code: NSURLErrorCancelled, userInfo: info))
self.error = urlError
if let urlProtocol = urlProtocol {
urlProtocol.stopLoading()
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3 changes: 3 additions & 0 deletions Tests/Foundation/Tests/TestURLSession.swift
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Expand Up @@ -1443,6 +1443,9 @@ class TestURLSession: LoopbackServerTest {
XCTAssertNotNil(error as? URLError)
if let urlError = error as? URLError {
XCTAssertEqual(urlError._nsError.code, NSURLErrorCancelled)
XCTAssertEqual(urlError.userInfo[NSURLErrorFailingURLErrorKey] as? URL, URL(string: urlString))
XCTAssertEqual(urlError.userInfo[NSURLErrorFailingURLStringErrorKey] as? String, urlString)
XCTAssertEqual(urlError.localizedDescription, "cancelled")
}

expect.fulfill()
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