[BUG] [typescript-fetch] JSON Strings include quotes in response

[vkhougaz-sonatype]

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

I have an API that returns JSON encoded strings, similar to

"API Result Information"

INCLUDING the quotes.

openapi-generator version

Usually 5.1.0, also reproduced on

OpenAPI declaration file content or url

https://github.com/vkhougaz-sonatype/openapi-bug/blob/master/swagger.yaml

swagger: "2.0"
info:
  version: v1
  title: Our API
  description: The REST API for interacting with Our API
host: localhost:1234
schemes:
  - http
paths:
  "/api/job/{jobid}/status":
    get:
      summary: getJobStatus
      description: Get the current status for a job.
      operationId: getJobStatus
      produces:
        - application/json;charset=utf-8
      parameters:
        - required: true
          in: path
          name: jobid
          type: string
      responses:
        "200":
          schema:
            $ref: "#/definitions/JobStatus"
          description: ""
        "404":
          description: "`jobid` not found"
definitions:
  JobStatus:
    type: string

Generation Details

docker run --rm -v "${PWD}:/local" openapitools/openapi-generator-cli generate -i /local/swagger.yaml -g typescript-fetch -o /local/out

Steps to reproduce

1. Install demo repo

git clone https://github.com/vkhougaz-sonatype/openapi-bug
cd openapi-bug
# node >v10
npm install
./build-and-serve.sh

2. open browser to http://localhost:1234
3. See status

Got `"ok"` expected `ok`

Related issues/PRs

#3709
#4028

Suggest a fix

Update api code to not use simple response for "string" type?

[ml1nk]

Still a problem in 6.2.1:

"responses": {
          "200": {
            "description": "Success",
            "content": {
              "application/json": {
                "schema": {
                  "type": "string"
                }
              }
            }
          }
}

leads to

        return new runtime.TextApiResponse(response);

instead of

        return new runtime.JSONApiResponse(response);

[Serranya]

I think this can be closed with #14659 merged.