aspnetcore/samples

CORS Sample

This sample consists of a request origin (SampleOrigin) and a request destination (SampleDestination). Both have different domain names, to simulate a CORS request.

Modify Hosts File Windows: Run a text editor (e.g. Notepad) as an Administrator. Open the hosts file on the path: "C:\Windows\System32\drivers\etc\hosts".

Linux: On a Terminal window, type "sudo nano /etc/hosts" and enter your admin password when prompted.

In the hosts file, add the following to the bottom of the file: 127.0.0.1 destination.example.com 127.0.0.1 origin.example.com

Save the file and close it. Then clear your browser history.

Run the sample *In a command prompt window, open the directory where you cloned the repository, and open the SampleDestination directory. Run the command: dotnet run *Repeat the above step in the SampleOrigin directory. *Open a browser window and go to http://origin.example.com *Click the button to see CORS in action.

If using Visual Studio to launch the request origin: Open Visual Studio and in the launchSettings.json file for the SampleOrigin project, change the launchUrl under SampleOrigin to http://origin.example.com:8080. Using the dropdown near the Start button, choose SampleOrigin before pressing Start to ensure that it uses Kestrel and not IIS Express.