Pact consumer API is incompatible with the Refit client

Hi there,

We are using Refit to generate typed API clients.

e.g.

var httpClient = new HttpClient { BaseAddress = new Uri(ctx.MockServerUri, "/api") };
var client = Refit.RestService.For<IMyApiClient>(httpClient);

When I do a GET request with Refit, it will send a request with an empty body without any content-type header. Pact expects a missing body in this case. When I try to configure an expected empty body (with WithBody) to match it with the request Refit is doing, I am forced to set an expected content-type as well. With this constraint I can never make those two library work together.

2022-11-09T07:00:43.297948Z  INFO tokio-runtime-worker pact_mock_server::hyper_server: Received request HTTP Request ( method: GET, path: /api/s2s/users, query: Some({"UserIds": ["1,2,3"]}), headers: Some({"host": ["127.0.0.1:62466"], "request-id": ["|98394da7c0defc2670305f8a0e803693.040a6b8dbc244591."], "authorization": ["Any valid token"], "accept": ["application/json"], "traceparent": ["00-98394da7c0defc2670305f8a0e803693-040a6b8dbc244591-00"]}), body: Empty )
2022-11-09T07:00:43.298541Z  INFO tokio-runtime-worker pact_matching: comparing to expected HTTP Request ( method: GET, path: /api/s2s/users, query: Some({"UserIds": ["1,2,3"]}), headers: Some({"host": ["127.0.0.1:56541"], "request-id": ["|b7d5eb21662c741f992816792949f208.34ac459fb07586a2."], "accept": ["application/json"], "Authorization": ["Bearer SomeValidAuthToken"], "traceparent": ["00-b7d5eb21662c741f992816792949f208-34ac459fb07586a2-00"]}), body: Missing )

[lehmamic]

The FFI functions need to be updated to support passing in an empty body and content type

Another option would be that no body considers an empty body as well. Either way is ok.

Btw. I used this combination already before and it did not cause any problems. But this was with Pact V2.

[rholshausen]

The FFI functions need to be updated to support passing in an empty body and content type