Vivotek v - Manual (Page 82)

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return
<return page> Redirect to the page <return page> after the
parameter is assigned. The <return page> can
be a full URL path or relative path according the
the current path. If you omit this parameter, it
will redirect to an empty page.
Example: Drive the digital output 1 to high and redirect to an empty page
http://myserver/cgi-bin/setdo.cgi?do1=H
Query status of the digital input
Note: This request requires the privilege of I/O access control.
Method: GET/POST
Syntax:
http://<servername>/cgi-bin/getdi.cgi?[di1][&di2][&di3][&di4]
If no parameter is specified, all the status of digital input will be returned.
Return:
HTTP/1.0 200 OK\r\n
Content-Type: text/plain\r\n
Content-Length: <length>\r\n
\r\n
[di1=<state>]\r\n
[di2=<state>]\r\n
[di3=<state>]\r\n
[di4=<state>]\r\n
where <state> can be H or L.
Example: Query the status of digital input 1
Request: