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July 7, 2020 21:32
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/// Future timeout example
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| /// Future timeout example | |
| void main() async { | |
| final howLongItTakesToDownloadTheInternet = Duration(days: 365); | |
| final youAreAnImpatientDeveloper = true; | |
| Future downloadTheInternet() => | |
| Future.delayed(howLongItTakesToDownloadTheInternet); | |
| if (youAreAnImpatientDeveloper) { | |
| // you can use timeout on any future and it'll throw an error if a future doesn't | |
| // complete before you run out of patience. | |
| final resultWithTimeout = await downloadTheInternet() | |
| .timeout(Duration(seconds: 5), onTimeout: () => 'Preloaded Data'); | |
| print( | |
| 'The download timed out. Here are cached results: $resultWithTimeout'); | |
| // this will throw | |
| final resultWithOutTimeout = | |
| await downloadTheInternet().timeout(Duration(seconds: 5)); | |
| print( | |
| "We won't get here unless the error is caught, in which cause, you could just use onTimeout"); | |
| } | |
| } |
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