Flutter/Dart: Easy way to check if http request was successful?

user_9175247 0
Viewed 1886

While using Flutters http request library I was wondering if there was an easy way to check if a request was successful without having to check the status code.

Most code samples I saw (including official ones) do something like this:

http.Response response = await http.Client().get(...);
    
if (response.statusCode == 200) {
   ...
}

However, those examples are ignoring the fact that all HTTP status codes starting with 2XX are considered successful. For example 201 stands for 201 Created.

I know for a fact that pythons http library has a simple ok flag, so in python could do something like this:

if response.ok:
   ...

Is there a feature like this in flutter/dart or do I have to implement a manual check?

dart flutter
1 Answers

You can make an extension method that does this easily:

extension IsOk on http.Response {
  bool get ok {
    return (statusCode ~/ 100) == 2;
  }
}

By adding the extension above, you can use the same response response.ok syntax that you like.

This extension works by isolating the 100th place digit by doing a truncating division by 100 and comparing the result to 2.

user_132501420
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