Read an online text file and put it into a variable - flutter

Question

I want to check an online txt file for the newest version code and show a dialog which says "Please update" or something similar. Is it posiible to put the content of the file into a variable?
EDIT: I tried Arpit Awasthi's solution but I get these errors:
lib/main.dart:685:25: Error: Method not found: 'HttpClient'.
var request = await HttpClient().getUrl(Uri.parse(url));
^^^^^^^^^^
lib/main.dart:687:23: Error: Method not found: 'consolidateHttpClientResponseBytes'.
var bytes = await consolidateHttpClientResponseBytes(response);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
lib/main.dart:688:5: Error: 'Directory' isn't a type.
Directory appDocDir = await getApplicationDocumentsDirectory();
^^^^^^^^^
lib/main.dart:690:5: Error: 'File' isn't a type.
File file = File("${appDocDir.path}/$fileName");
^^^^
lib/main.dart:690:17: Error: Method not found: 'File'.
File file = File("${appDocDir.path}/$fileName");
^^^^
lib/main.dart:691:5: Error: 'File' isn't a type.
File urlFile = await file.writeAsBytes(bytes);
^^^^

Answer 1

You can use the following function to download the file and then get the File object of that file.
static downloadFile(String url) async{
var request = await HttpClient().getUrl(Uri.parse(url));
var response = await request.close();
var bytes = await consolidateHttpClientResponseBytes(response);
Directory appDocDir = await getApplicationDocumentsDirectory();
String fileName = ('yourFileName.fileExtention');
File file = File("${appDocDir.path}/$fileName");
File urlFile = await file.writeAsBytes(bytes);
return urlFile;
}
Note :- I've used this plugin to get app folder path :- path_provider: ^1.6.18

Answer 2

Basically, what you can do is the following.
You May Define in a variable (context probably) you Current Version...
The you a async http request, you can call to an API where you check your latest release and if it is > that current one, trigger an alert dialog that shows that There is a new version available.