Url Resources; Special Escape Sequences - AMX NXD-CV7 Instruction Manual

URL Resources

A URL can be broken into several parts. For example: the URL http://www.amx.com/company-
info-home.asp. This URL indicates that the protocol in use is http (HyperText Transport Protocol)
and that the information resides on a host machine named www.amx.com. The image on that host
machine is given an assignment (by the program) name of company-info-home.asp (Active Server
Page).
The exact meaning of this name on the host machine is both protocol dependent and host
dependent. The information normally resides in a file, but it could be generated dynamically. This
component of the URL is called the file component, even though the information is not necessarily
in a file.
A URL can optionally specify a port, which is the port number to which the TCP connection is
made on the remote host machine. If the port is not specified, the default port for the protocol is
used instead. For example, the default port for http is 80. An alternative port could be specified as:
http://www.amx.com:8080/company-info-home.asp.
Any legal HTTP syntax can be used.

Special escape sequences

The system has only a limited knowledge of URL formats in that it transparently passes the URL
information onto the server for translation. A user can then pass any parameters to the server side
programs such as CGI scripts or active server pages. However; the system will parse the URL
looking for special escape codes. When it finds an escape code it replaces that code with a
particular piece of panel, button, or state information.
For example, "http://www.amx.com/img.asp?device=$DV" would become "http://www.amx.com/
img.asp?device=10001". Other used escape sequences include:
Escape Sequences
Sequence
$DV
$SY
$IP
$HN
$MC
$ID
$PX
$PY
$BX
$BY
$BN
$ST
$AC
$AP
$CC
7" Modero Widescreen Touch Panels
Panel Information
Device Number
System Number
IP Address
Host Name
Mac Address
Neuron ID
X Resolution of current panel mode/file
Y Resolution of current panel mode/file
X Resolution of current button
Y Resolution of current button
Name of button
Current state
Address Code
Address Port
Channel Code
Appendix
173