POST request with no arguments returns an empy response

[swh]

Requesting the SPARQL endpoint using POST with no arguments results in no return, eg:

$ telnet localhost 8000
Connected to XXX.
Escape character is '^]'.
POST /sparql/
Connection closed by foreign host.

Also

$ 4s-httpd bsbm25
$ curl -X POST http://localhost:8080/sparql/
curl: (52) Empty reply from server