score:31
Accepted answer
Since post awaits a value that implements the Writeable and ContentTypeOf type classes,
you can use the Results.EmptyContent from play.api.mvc. (See API)
So I guess
WS.url("http://service/endpoint").post(Results.EmptyContent())
should do. (Didnt test)
score:2
As of Play 2.8, you cannot use the WSRequest.post(body) methods with an empty body, because the BodyWritable trait requires a non-empty Content-Type
Instead, you can do ws.url(u).execute("POST") to send an HTTP POST request with no body.
score:29
For Play 2.6 and after, you have to use play.api.libs.ws.EmptyBody.
import play.api.libs.ws.{EmptyBody, WSClient}
WS.url("http://service/endpoint).post(EmptyBody)
Typical error is:
Cannot find an instance of play.api.mvc.Results.EmptyContent to WSBody. Define a BodyWritable[play.api.mvc.Results.EmptyContent] or extend play.api.libs.ws.ahc.DefaultBodyWritables
Source: stackoverflow.com
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