Flutter error - Invalid argument(s): No host specified in URI nullapi/auth/login/

Question

Fairly new to Flutter and have encountered an issue. I am trying to get the emulator (for both iOS and Android) of my app to connect to an API that is running on my local machine. I had it working up until I upgraded flutter null-safety and have not been able to get it back since. Any suggestions on how I can fix the error I am getting?

Answer 1

The error is clear about that - you are trying to access the URI without a host. The line with the URI path looks like nullapi/auth/login/ I assume it should not start from null.

The part of the code you provided us with in question is not clear regarding the error because the error clearly appears when you try to call api/auth/login/ but there is nothing regarding this call in the code you provided.

The issue is that your apiURL is null. At which point it becomes null - that I don't know - the code in question is not enough to figure it out. I would suggest you debug the whole data flow - from parsing to the actual call, and, I am sure of it, you will be able to find the issue.

Answer 2

Did you added json file to your assets in pubspec.yaml file ? like below

flutter:
  assets:
    - locale/en.json

Add file json and rebuild the app

Answer 3

The solution was that my environment file did not specify all the variables required to properly build the application, which resulted in null variables.

After configuring these variables to allow them to be nullable, the application was built successfully.