Extracting a block of text from a large file using variables? Post: 302891740

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html::template

HTML::Template(3ruby)													     HTML::Template(3ruby)

NAME

       HTML::Template - Ruby extension for HTML::Template

DESCRIPTION

       This  module  deals  with HTML template by CGI scripts and use a complete selectivity between design and logic easily.  You can deal with a
       nested block, a loop and a conditional expression.  Simple example, see below.

       template file test.html
	   <HTML>
	   <HEAD><TITLE>Test Template</TITLE>
	   <BODY>
	   My Home Directory is <!var:home>
	   <P>
	   My Path is set to <!var:path>
	   </BODY>
	   </HTML>
       Ruby script
	   require "html/template"
	   tmpl = HTML::Template.new("./test.html")
	   tmpl.param({
		      'home' => ENV['HOME'],
		      'path' => ENV['PATH']
		      })
	   print "Content-Type: text/html

"
	   print tmpl.output

INSTALL

       using install.rb
	   % tar xvzf html-template-x.xx.tar.gz
	   % cd html-template-x.xx
	   % ruby install.rb config
	   % ruby install.rb setup
	   % su
	   # ruby install.rb install

Template File
TAGS

       You can use original style tag or valid HTML comment style tag.

       <!var:PARAMETER_NAME>

       <!-- var:PARAMETER_NAME -->
	      When you call HTML::Template#param ({PARAMETER_NAME => VAL}), tags will be simply replaced to VAL.

       <!begin:PARAMETER_NAME>

       <!end:PARAMETER_NAME>

       <!-- begin:PARAMETER_NAME -->

       <!-- end:PARAMETER_NAME -->
	      It allows you to separate a section of text and give it a name It would be able to make them loop or conditional	expression.   And,
	      it can be nested.

       <!include:FILE_NAME>

       <!-- include:FILE_NAME -->
	      A  file  specified  by FILE_NAME is simply inserted to a template file.  The template file will be treated as a merged template.	If
	      you pass the path param to HTML::Template.new , include file will be searched under the path.

HTML
::Template CLASS
CLASS METHODS

       HTML::Template.new(params = {})
	      Creates a HTML::Template object.	Given a file name to its first argument, use this file as a template.

	      Also you can pass params as Hash.  The options are below

       o filename
	      template filename

       o path template search path.  you can specified as String or Array of String.

METHODS

       HTML::Template#load(file)
	      Load template file.

       HTML::Template#set_html(html)
	      Setting up a string as a template.

       HTML::Template#param(hash = {})

       HTML::Template#expand(hash = {})
	      Specifies a string or a loop by Hash for a substitute.  When specifying more than a loop simultaneously, value of the  hash  becomes
	      an array.

       HTML::Template#node(name)

       HTML::Template#loop(name)

       HTML::Template#cond(name)
	      Stands a loop and a conditional expression specified by <!begin:name><!end:name> Retrieves HTML::TemplateNode object.

       HTML::Template#output

       HTML::Template#to_s
	      Returns the final result.

HTML
::TemplateNode CLASS
       This is a class for a loop or a conditional expression.	An instance consists of HTML::Template Class and HTML::TemplateNode CLASS.

METHODS

       HTML::TemplateNode#node(name)
	      Stands a loop or a conditional expression specified by <!begin:name><!end:name> Returns HTML::TemplateNode object.  Is only used for
	      nested.

       HTML::TemplateNode#param(hash = {})

       HTML::TemplateNode#expand(hash = {})

       HTML::TemplateNode#add(hash = {})
	      Specifies a string or a loop by Hash for a substitute.  If you don't call the method, the block won't be displayed.

A LOOP

       This sample is a displaying list of environment valiables.
	   <html>
	   <body>
	   <h1>Env List</h1>
	   <hr>
	   <!begin:envlist>
	   <!var:key> : <!var:val><br>
	   <!end:envlist>
	   <hr>
	   </body>
	   </html>

	   # In case of using it with iterator and replace data.
	   require "html/template"
	   tmpl = HTML::Template.new("filename" => "envlist.html")
	   ENV.keys.sort.each do |k|
	     tmpl.node("envlist").param({'key' => k,
					 'val' => ENV[k]
					})
	   end
	   print "Content-Type: text/html

"
	   print tmpl.output

	   # In case of giving a loop as an array
	   require "html/template"
	   tmpl = HTML::Template.new("envlist.html")
	   envlist = []
	   ENV.keys.sort.each do |k|
	     envlist.push({'key' => k,
			   'val' => ENV[k]
			  })
	   end
	   tmpl.param({'envlist' => envlist})
	   print "Content-Type: text/html

"
	   print tmpl.output

A Conditional Expression
	   <html>
	   <body>
	   <!begin:true>
	   This is True
	   <!var:foo>
	   <hr>
	   <!end:true>
	   <!begin:false>
	   This is False
	   <!var:foo>
	   <hr>
	   <!end:false>
	   </body>
	   </html>

	   require "html/template"
	   tmpl = HTML::Template.new("cond.html")
	   tmpl.param({'true' => {'foo' => 'foobar'}
		      })
	   print "Content-Type: text/html

"
	   print tmpl.output
       The performed result is below, however, a part not specied with the method isn't displayed.
	   <html>
	   <body>

	   This is True
	   foobar
	   <hr>
	   </body>
	   </html>

An attached Sample.
       env.rb This sample is a simply replacing valiables.

       envlist.rb
	      This sample is a displaying list of environment valiables.  This sample is a case for using with iterator.

       envlist2.rb
	      Performed result is the same as the envlist.rb.'s.

       nest.rb
	      A sample of a nested loop.

THANKS

       English Documentation NAKAYAMA Nao <nao_o@netlaputa.ne.jp> thanks a lot :-)

AUTHOR

       Copyright 2001 IKEBE Tomohiro This library is free software; you can redistribute it and / or modify  it  under	the  same  terms  as  Ruby
       itself.	IKEBE Tomohiro <ikechin@Oxfa.com>

								     June 2002						     HTML::Template(3ruby)

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