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.\" ========================================================================
.\"
.IX Title "Template::Plugin::URL 3"
.TH Template::Plugin::URL 3 "2014-04-24" "perl v5.16.3" "User Contributed Perl Documentation"
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.SH "NAME"
Template::Plugin::URL \- Plugin to construct complex URLs
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    [% USE url(\*(Aq/cgi\-bin/foo.pl\*(Aq) %]
\&    
\&    [% url(debug = 1, id = 123) %]
\&       # ==> /cgi/bin/foo.pl?debug=1&amp;id=123
\&
\&    [% USE mycgi = url(\*(Aq/cgi\-bin/bar.pl\*(Aq, mode=\*(Aqbrowse\*(Aq, debug=1) %]
\&    
\&    [% mycgi %]
\&       # ==> /cgi/bin/bar.pl?mode=browse&amp;debug=1
\&    
\&    [% mycgi(mode=\*(Aqsubmit\*(Aq) %]
\&       # ==> /cgi/bin/bar.pl?mode=submit&amp;debug=1
\&    
\&    [% mycgi(debug=\*(Aqd2 p0\*(Aq, id=\*(AqD4\-2k[4]\*(Aq) %]
\&       # ==> /cgi\-bin/bar.pl?mode=browse&amp;debug=d2%20p0&amp;id=D4\-2k%5B4%5D
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \f(CW\*(C`URL\*(C'\fR plugin can be used to construct complex URLs from a base stem 
and a hash array of additional query parameters.
.PP
The constructor should be passed a base \s-1URL\s0 and optionally, a hash array
reference of default parameters and values.  Used from with a template,
it would look something like the following:
.PP
.Vb 3
\&    [% USE url(\*(Aqhttp://www.somewhere.com/cgi\-bin/foo.pl\*(Aq) %]
\&    [% USE url(\*(Aq/cgi\-bin/bar.pl\*(Aq, mode=\*(Aqbrowse\*(Aq) %]
\&    [% USE url(\*(Aq/cgi\-bin/baz.pl\*(Aq, mode=\*(Aqbrowse\*(Aq, debug=1) %]
.Ve
.PP
When the plugin is then called without any arguments, the default base
and parameters are returned as a formatted query string.
.PP
.Vb 1
\&    [% url %]
.Ve
.PP
For the above three examples, these will produce the following outputs:
.PP
.Vb 3
\&    http://www.somewhere.com/cgi\-bin/foo.pl
\&    /cgi\-bin/bar.pl?mode=browse
\&    /cgi\-bin/baz.pl?mode=browse&amp;debug=1
.Ve
.PP
Note that additional parameters are separated by '\f(CW\*(C`&amp;\*(C'\fR' rather than
simply '\f(CW\*(C`&\*(C'\fR'.  This is the correct behaviour for \s-1HTML\s0 pages but is,
unfortunately, incorrect when creating URLs that do not need to be
encoded safely for \s-1HTML. \s0 This is likely to be corrected in a future
version of the plugin (most probably with \s-1TT3\s0).  In the mean time, you
can set \f(CW$Template::Plugin::URL::JOINT\fR to \f(CW\*(C`&\*(C'\fR to get the correct
behaviour.
.PP
Additional parameters may be also be specified to the \s-1URL:\s0
.PP
.Vb 1
\&    [% url(mode=\*(Aqsubmit\*(Aq, id=\*(Aqwiz\*(Aq) %]
.Ve
.PP
Which, for the same three examples, produces:
.PP
.Vb 3
\&    http://www.somewhere.com/cgi\-bin/foo.pl?mode=submit&amp;id=wiz
\&    /cgi\-bin/bar.pl?mode=browse&amp;id=wiz
\&    /cgi\-bin/baz.pl?mode=browse&amp;debug=1&amp;id=wiz
.Ve
.PP
A new base \s-1URL\s0 may also be specified as the first option:
.PP
.Vb 1
\&    [% url(\*(Aq/cgi\-bin/waz.pl\*(Aq, test=1) %]
.Ve
.PP
producing
.PP
.Vb 3
\&    /cgi\-bin/waz.pl?test=1
\&    /cgi\-bin/waz.pl?mode=browse&amp;test=1
\&    /cgi\-bin/waz.pl?mode=browse&amp;debug=1&amp;test=1
.Ve
.PP
The ordering of the parameters is non-deterministic due to fact that 
Perl's hashes themselves are unordered.  This isn't a problem as the 
ordering of \s-1CGI\s0 parameters is insignificant (to the best of my knowledge).
All values will be properly escaped thanks to some code borrowed from
Lincoln Stein's \f(CW\*(C`CGI\*(C'\fR module.  e.g.
.PP
.Vb 2
\&    [% USE url(\*(Aq/cgi\-bin/woz.pl\*(Aq) %]
\&    [% url(name="Elrich von Benjy d\*(AqWeiro") %]
.Ve
.PP
Here the spaces and "\f(CW\*(C`\*(Aq\*(C'\fR" character are escaped in the output:
.PP
.Vb 1
\&    /cgi\-bin/woz.pl?name=Elrich%20von%20Benjy%20d%27Weiro
.Ve
.PP
An alternate name may be provided for the plugin at construction time
as per regular Template Toolkit syntax.
.PP
.Vb 2
\&    [% USE mycgi = url(\*(Aqcgi\-bin/min.pl\*(Aq) %]
\&    [% mycgi(debug=1) %]
.Ve
.SH "AUTHOR"
.IX Header "AUTHOR"
Andy Wardley <abw@wardley.org> <http://wardley.org/>
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (C) 1996\-2007 Andy Wardley.  All Rights Reserved.
.PP
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Template::Plugin