Regression: Wrong request URL if server URL scheme is part of variable (works in v3)

[StefanBauerTT]

Q&A (please complete the following information)

• OS: Windows
• Browser: Firefox
• Version: 129
• Method of installation: Online Version https://editor.swagger.io/
• Swagger-Editor version: online version
• Swagger/OpenAPI version: OpenAPI 3.0

Content & configuration

Example Swagger/OpenAPI definition:

openapi: 3.0.2
info:
  title: Reproducer
  version: 1.0.0
servers:
  - url: '{url}'
    variables:
      url:
        default: https://dummy.restapiexample.com

paths:
  /api/v1/employees:
    get:
      responses:
        '200':
          description: Response

Describe the bug you're encountering

When executing the GET request, the Request URL is built incorectly.

To reproduce...

• Click "GET /api/v1/employees"
• Click "Try it out"
• Click "Execute"

Expected behavior

• The request URL is "https://dummy.restapiexample.com/api/v1/employees"
• The response shows some JSON

Actual behaviour

• The request URL is https://editor.swagger.io/https%3A%2F%2Fdummy.restapiexample.com/api/v1/employees
• The response is a 404

Additional context or thoughts

This is a regression. It works when using docker run -d -p 80:8080 swaggerapi/swagger-editor:v3.18.1

It seems to be related to the URL scheme being part of the variable substitution, as the follwing example works fine:

openapi: 3.0.2
info:
  title: Reproducer
  version: 1.0.0
servers:
  - url: 'https://{host}'
    variables:
      host:
        default: dummy.restapiexample.com

paths:
  /api/v1/employees:
    get:
      responses:
        '200':
          description: Response