Response selection using request cookie

[kryvel]

In addition to the existing Prefer header functionality, I added the same but with a cookie.
Prefer header has greater priority over cookie

[jormaechea]

@kryvel thanks for the PR. Can you explain more your intention?
What is the expected behaviour?

The Prefer header is parsed using parse-prefer-header, this won't work if you just pass all the cookie header.

[kryvel]

In some cases (eg. automated headless testing in browser via selenium) there is no possibility to send additional headers from client script. But possible to set cookie in browser with additional data, name of example or status code in this case. Such cookie will be sent by the client script to the mocker server.

parse-prefer-header parse only content of Prefer header. So, if Cookie header will contain the same data as Prefer header, it will work just fine.

@kryvel thanks for the PR. Can you explain more your intention? What is the expected behaviour?

The Prefer header is parsed using parse-prefer-header, this won't work if you just pass all the cookie header.

[jormaechea]

Understood. I think that there must be a predefined cookie with the same content of the prefer content, because parsing the whole cookie header will prevent other cookies to be sent (and will probably go against any standard out there).

For example, an OpenApiMockerPrefer cookie or something like that.
And it's content could be statusCode=400.

What do you think?

PS. Sorry about the delay, I couldn't pay any attention to spare-time projects..