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import 'dart:io';
import 'package:args/args.dart';
import 'package:shelf/shelf.dart' as shelf;
import 'package:shelf/shelf_io.dart' as io;
// For Google Cloud Run, set _hostname to '0.0.0.0'.
const _hostname = 'localhost';
main(List<String> args) async {
var parser = ArgParser()..addOption('port', abbr: 'p');
var result = parser.parse(args);
// For Google Cloud Run, we respect the PORT environment variable
var portStr = result['port'] ?? Platform.environment['PORT'] ?? '8080';
var port = int.tryParse(portStr);
if (port == null) {
stdout.writeln('Could not parse port value "$portStr" into a number.');
// 64: command line usage error
exitCode = 64;
return;
}
var handler = const shelf.Pipeline()
.addMiddleware(shelf.logRequests())
.addHandler(_echoRequest);
var server = await io.serve(handler, _hostname, port);
print('Serving at http://${server.address.host}:${server.port}');
}
shelf.Response _echoRequest(shelf.Request request) =>
shelf.Response.ok('Request for "${request.url}"');
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