Ns adp registerscript

Man page: http://aolserver.com/docs/devel/tcl/api/adp.html#ns_register_adptag

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NAME

ns_register_adptag - Register an XML-like tag for use within an ADP.

SYNOPSIS

ns_register_adptag command ?endcommand? proc

DESCRIPTION

ns_register_adptag registers a procedure to be called when the specified beginning and ending tags are used in an ADP. The command is the beginning tag to look for, and the endcommand is the ending tag to look for. The proc is the procedure that will be called when AOLserver encounters those tags when processing an ADP.

Try not to confuse ns_register_adptag with ns_adp_registertag. This one registers a Tcl proc that is run by the tag. The other one registers an ADP script that is run by the tag.

There are two ways to use ns_register_adptag, with and without the endcommand parameter:

• If the endcommand parameter is specified, the procedure you specify with proc must be of the form:

   proc myadpproc { string tagset }

The string is the string of characters between the beginning tag and the ending tag. The tagset is an ns_set of parameters that were specified with the beginning tag. The return value of the procedure will be sent to the browser in place of the string of text that was specified between the beginning and ending tags.

The string is not parsed, which means that you cannot include ADP tags in the string unless you execute ns_adp_parse on the string inside the procedure that processes the registered ADP tag.

• If endcommand is not specified, then no closing tag is required. The procedure (proc) will be called every time the specified command is encountered. The procedure should take one parameter, an ns_set containing the parameters to the tag:

   proc myadpproc { tagset }

Note: This function cannot be called after the server has started. It must be called in a Tcl script in a virtual server's Tcl directory so that it can be initialized at server startup time.

EXAMPLE

Suppose you want to register a tag that displays the enclosed text only if it is Christmas. You could register the tag as follows:

   ns_register_adptag "christmas" "/christmas" xmas

   # Note: We are registering a Tcl proc.
   proc xmas {string tagset} {
       if {[ns_fmttime [ns_time] "%m/%d"] == "12/25"}  then {
           return $string
       }
   }

Then, in an ADP, you use these tags:

   <christmas>Merry Christmas to all, and to all a good night!</christmas>

In another example we show how to use a registered tag without an endcommand. The tag is registered as follows:

   ns_register_adptag hello helloproc

   # Note: We are registering a Tcl proc.
   proc helloproc { tags } {
       return "Hello, [ns_set get $tags name]."
   }

In an ADP, you use this tag:

   <hello name=Bob>

This can be extended to provide XML-like template pages for content.

SEE ALSO

ns_adp_registertag, ns_adp_parse