WireMock.Net: Content-Type multipart/form-data is not serialized in proxy and recording mode

In the last version of WireMock.Net.StandAlone ( Version=“1.0.8”), when doing a Content-Type multipart/form-data POST request, the mapping generated doesn’t contain the Matcher for the body (so that don’t made it a valid mapping).

Note: I forward to another Wiremock instance and see the content of the body, so the content seems to be forwarded.

I get the generated mapping (Notice the empty “Body” key) :

{
  "Guid": "ba19b8f6-432e-4e4b-92e0-d51c372b4277",
  "Title": "",
  "Priority": 0,
  "Request": {
    "Path": {
      "Matchers": [
        {
          "Name": "WildcardMatcher",
          "Pattern": "/export/xxxxxx/upload",
          "IgnoreCase": false
        }
      ]
    },
    "Methods": [
      "POST"
    ],
    "Headers": [
      {
        "Name": "Content-Type",
        "Matchers": [
          {
            "Name": "WildcardMatcher",
            "Pattern": "multipart/form-data; boundary=\"31455f07-7487-400f-906e-9e1aefa04869\"",
            "IgnoreCase": true
          }
        ]
      },
      {
        "Name": "Host",
        "Matchers": [
          {
            "Name": "WildcardMatcher",
            "Pattern": "localhost:8080",
            "IgnoreCase": true
          }
        ]
      },
      {
        "Name": "Content-Length",
        "Matchers": [
          {
            "Name": "WildcardMatcher",
            "Pattern": "298",
            "IgnoreCase": true
          }
        ]
      }
    ],
    "Body": {}
  },
  "Response": {
    "StatusCode": 404,
    "BodyAsJson": {
      "Status": "No matching mapping found"
    },
    "UseTransformer": false,
    "Headers": {
      "Content-Type": "application/json",
      "Date": "Mon, 01 Apr 2019 10:09:04 GMT",
      "Server": "Kestrel",
      "Transfer-Encoding": "chunked"
    }
  }
}

I have the same behavior when doing the request through Postman or C# code…

If you want to test, you could reproduce with this code.

        public async Task<T> UploadFileFromPath<T>(string uri, string filePath, string filename = null)
        {
            if (!File.Exists(filePath))
            {
                throw new ArgumentException($"The file to upload '{filePath}' doesn't exist!");
            }

            using (var fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
            using (var form = new MultipartFormDataContent())
            using (var sc = new StreamContent(fs))
            {
                sc.Headers.ContentType = MediaTypeHeaderValue.Parse("application/json");
                form.Add(sc, "file", filename ?? Path.GetFileName(filePath));
                var response = await _httpClient.PostAsync(uri, form).ConfigureAwait(false);
                response.EnsureSuccessStatusCode();
                return await HandleResponse<T>(response).ConfigureAwait(false);
            }
        }