Dynamically return a file based on query argument

Question

I have this stub defined within my mappings directory. I'm trying to return a file dynamically based upon the value of my query parameter (the query param and file name will have the same name)

Please see below an example.

{
  "request": {
    "method": "GET",
    "urlPathPattern": "/some/url/locales/en_GB/products",
    "queryParameters": {
      "typeName": {
        "matches": "([A-Za-z]*)"
      }
    }
  },
  "response": {
    "status": 200,
    "bodyFileName" : "{{request.pathSegments.[5]}}",
    "transformers": [
      "response-template"
    ]
  }
}

The GET request would look something like

.../some/url/locales/en_GB/products?typeName=blah

In my __files directory, I would have a file called blah.json which I want the response to match.

I'm not sure if the bodyFileName is correct. The 5 represents positioning of the query param, zero-indexed.

Answer 1

Figuring out what values are represented by the different Response Template variables is not difficult. Below is an example to g

{
  "request": {
    "method": "GET",
    "urlPathPattern": "/some/url/locales/en_GB/products",
    "queryParameters": {
      "typeName": {
        "matches": "([A-Za-z]*)"
      }
    }
  },
  "response": {
    "status": 200,
    "body" : "request.requestline.pathSegments:\n[0]: {{request.requestLine.pathSegments.[0]}}\n[1]: {{request.requestLine.pathSegments.[1]}}\n[2]: {{request.requestLine.pathSegments.[2]}}\n[3]: {{request.requestLine.pathSegments.[3]}}\n[4]: {{request.requestLine.pathSegments.[4]}}\n[5]: {{request.requestLine.pathSegments.[5]}}\n\nrequest.query.typeName: {{request.query.typeName}}",
    "transformers": [
      "response-template"
    ]
  }
}

And a GET request http://localhost:8080/some/url/locales/en_GB/products?typeName=test results in this response:

request.requestline.pathSegments:
[0]: some
[1]: url
[2]: locales
[3]: en_GB
[4]: products
[5]: 

request.query.typeName: test

With the above in mind you can see that the value you seek is not retrieved using request.pathSegments[x] but rather request.query.typeName. This results then into:

{
  "request": {
    "method": "GET",
    "urlPathPattern": "/some/url/locales/en_GB/products",
    "queryParameters": {
      "typeName": {
        "matches": "([A-Za-z]*)"
      }
    }
  },
  "response": {
    "status": 200,
    "bodyFileName": "{{request.query.typeName}}.json",
    "transformers": [
      "response-template"
    ]
  }
}