Jan Burse, created Feb 24. 2019
* Prolog code for the multimedia hello HTTP server.
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* dispatch(O, P, R, S):
* The predicate succeeds in dispatching the request for object
* O, with path P, with request R and the socket S.
% dispatch(+Object, +Spec, +Request, +Socket)
dispatch(_, '/example04/piglet.gif', Request, Session) :- !,
http:dispatch(Object, Spec, Request, Session).
% dispatch_hello(+Request, +Socket)
% handle_hello(+Atom, +Socket)
% send_hello(+Atom, +Socket)
response_text(200, ['Content-Type'-'text/html; charset=UTF-8'], Response),
write(Response, ' <center><img src="piglet.gif">\r\n'),
write(Response, '<h1>Happy New Year 2019, '),
% html_begin(+Stream, +Atom)
write(Response, '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">\r\n'),
write(Response, ' <head>\r\n'),
write(Response, ' <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">\r\n'),
write(Response, ' <meta name="viewport" content="width=device-width, initial-scale=1.0">\r\n'),
write(Response, ' </head>\r\n'),
write(Response, ' <body>\r\n').
write(Response, ' </body>\r\n'),
% ?- run_http(example04/hello, 8085), write('.'), flush_output, fail; true.
% Point browser to: http://localhost:8085/example04/hello.jsp?name=Fritz