How do I send a JSON data with libwebsockets C library?

How do I send a JSON data with libwebsockets C library?

I've installed and tried the example codes, but I couldn't see any example on how to send data to localhost:someport, simply. Any help will be greately appreciated.

Here is the website of libwebsockets: http://libwebsockets.org/trac/libwebsockets

Here is the test-client.c file : http://git.libwebsockets.org/cgi-bin/cgit/libwebsockets/tree/test-server

Any help will be greately appreciated.