[BUG][swift5] Generated client ignores redirection

Description

Generated OpenAPI client follows all redirection instead of handling described 3xx response cases.

Probably, URLSessionImplementations.swift should be extended with

func urlSession(_ session: URLSession, task: URLSessionTask, willPerformHTTPRedirection response: HTTPURLResponse, newRequest request: URLRequest, completionHandler: @escaping (URLRequest?) -> Void)

delegate method

openapi-generator version

5.4.0

OpenAPI declaration file content or url

openapi: 3.0.1
info:
  title: Redirect example
  contact:
    email: krasylnikov@gmail.com
  version: "1.0"
servers:
- url: http://wikipedia.com
paths:
  /:
    get:
      responses:
        200:
          description: OK
        301:
          description: Clients should follow the `Location` header to get the new URI.
          headers:
            Location:
              description: URI where the client can get the new URI.
              schema:
                type: string
                format: uri
        302:
          description: Clients should follow the `Location` header to get the new URI.
          headers:
            Location:
              description: URI where the client can get the new URI.
              schema:
                type: string
                format: uri
              
components: {}

Generation Details

openapi-generator generate -i redirect.yaml -g swift5 -o OpenAPI

Steps to reproduce

1. Generate OpenAPI client with given yaml and command line.
2. Import it to AppDelegate as import OpenAPIClient
3. Call

DefaultAPI.rootGet(completion:{ data, error in
            
        })

Expected result:

The "data" variable contains redirection URI to https://www.wikipedia.org/ (instead of original http://wikipedia.com)

Actual result:

The "data" variable is empty, generated client silently performs redirection

Related issues/PRs

Suggest a fix

Start with URLSessionImplementations.swift and reproduce the generated swift5 client using redirect.yaml and the stated openapi-generator command. Verify the DefaultAPI.rootGet call against the documented 3xx responses; done means the client handles the redirect response rather than silently following it and returning empty data.