HttpException: Unexpected response (unsolicited response without request) not catchable #60333
Description
It happens that a http server responses in an illegal way, resulting in a HttpException: Unexpected response (unsolicited response without request). However, this error is thrown in a Stream listener and cannot be caught in client code. As a result, the program ends prematurely or otherwise behaves unexpected.
Here is some example code, to reproduce:
import 'dart:async';
import 'dart:convert';
import 'dart:io';
Future<void> main() async {
var uri = Uri.parse(
'https://identitytoolkit.googleapis.com/v1/recaptchaParams?alt=json');
var client = HttpClient();
while (true) {
try {
var r = await client.openUrl('GET', uri);
// we set the content length to -1, but add empty content to trigger an unexpected response from the server
r.contentLength = -1;
await r.addStream(Stream.empty());
print('send request to $uri');
var response = await r.close();
print('response status code: ${response.statusCode}');
await response.transform(utf8.decoder).join();
await Future.delayed(Duration(milliseconds: 200));
} catch (e) {
// the error is never caught
print('We caught the error: $e');
}
}
}Tested on Dart SDK version: 3.5.3