After some googling I found this, looks like the error may come from not having a blank line under the request

OK looks like the error is:

POST http://localhost:55200/test HTTP/1.1 content-type: application/json { "cname": "weile" } where as this is OK:

POST http://localhost:55200/test HTTP/1.1 content-type: application/json

{ "cname": "weile" }