How to fix this error "warn: Microsoft.AspNetCore.HttpsPolicy.HttpsRedirectionMiddleware[3] Failed to determine the https port for redirect."

Question

Good evening , I am trying to build a simple web api using ASP.Net . The app has been showing the error like this after building it -

warn: Microsoft.AspNetCore.HttpsPolicy.HttpsRedirectionMiddleware[3]
      Failed to determine the https port for redirect.

I have built according to this documentation-
https://learn.microsoft.com/en-in/training/modules/build-web-api-aspnet-core/3-exercise-create-web-api

Answer 1

Watch dotnet run if there is https connection setting for existing project with;

dotnet watch -lp https

if you have profile for https, the connection automatically will open with your browser. Otherwise, create new https connection!

If https connection exist:

1 - Open the launchSettings.json file.

2 - Find the section where your profiles are listed.

3 -Change the order of the profiles so that the HTTPS profile is listed first.

4 - Save the changes to the launchSettings.json file.

RESULT:

Answer 2

Run

dotnet run --launch-profile https

Both ports are valid in browser and httprepl If you are going to do Razor app tutorial

dotnet watch --launch-profile https

This can work as well, but if you try to access the page in http port in browser you will be redirect to https port. I guess because http page is not encouraged in browser anymore.

Unless you comment out this line in Program.cs

app.UseHttpsRedirection();

Then you can vist pages under different protocals.

Reference: https://github.com/dotnet/sdk/issues/29569

Answer 3

Has anyone been able to solve this? All the solutions above didn't work for me.

Answer 4

I changed the order of HTTP and HTTPS profile definitions. And as seen in the screenshot, both ports started to work actively. However, a new WARN appeared on the console.

Answer 5

You need to choose the right profile without any edits just run:

dotnet run --launch-profile https