orclz>
orclz> select dbms_xdb_config.gethttpport from dual;

GETHTTPPORT
-----------
       8000

orclz> exec  dbms_epg.create_dad('scott_dad','/scott/*')

PL/SQL procedure successfully completed.

orclz>
orclz> create or replace procedure scott.hello_world as begin
  2  htp.print('Hello world at '||to_char(systimestamp));
  3  end;
  4  /

Procedure created.

orclz> exit
Disconnected from Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

C:\Users\john>
C:\Users\john>wget http://SCOTT:tiger@127.0.0.1:8000/scott/hello_world
--08:56:10--  http://SCOTT:*password*@127.0.0.1:8000/scott/hello_world
           => `hello_world'
Connecting to 127.0.0.1:8000... connected.
HTTP request sent, awaiting response... 401 Unauthorized
Connecting to 127.0.0.1:8000... connected.
HTTP request sent, awaiting response... 200 OK
Length: 51 [text/html]

100%[==========================================================================================================>] 51            --.--K/s

08:56:10 (1005.48 KB/s) - `hello_world' saved [51/51]


C:\Users\john>
C:\Users\john>type hello_world
Hello world at 22-OCT-15 08.54.20.819000000 +01:00

C:\Users\john>