ClearSilver

ClearSilver is a fast, powerful, and language-neutral template system. It is designed to make it easy to create template driven static or dynamic websites.

http://www.clearsilver.net/

ClearSilver is first and foremost designed to be extremely fast. It is coded completely in C and exported to your script language of choice (i.e. Python, Perl). As a result, it is notably faster than template systems written in a script language. However, its design has additional benefits. It is also one of the only template systems available which allows you to easily mix-and-match multiple programming languages with the same templates, even on the same page. This allows you to optimize your website by writing C-modules to handle speed-sensitive sections, while leaving the majority of your site in easy to write script code.

Brandon Long. http://www.fiction.net/blong/

Features

• Fast, simple, language-neutral template system.
• Modules currently available for C, Python, Perl.
• Powerful template language supports variable substitution, template includes, conditionals, loops, macros, recursive macros, local variables.
• Full CGI-handling kit with support for CGI/1.1, RFC 2388, automatic gzip compression, and other CGI standards.
• "Pipelined" rendering model stores rendering data in an intermediate static dataset and makes debugging easier.
• Separate your web application from its appearance.
• Allow non-programmers access to edit parts of the site appearance.
• Open Source and non-restrictive license

ClearSilver由3各部分组成：hdf数据描述，cst模版文件，py逻辑处理向hdf赋值

Example

编写hdf文件:hello.hdf

# This is my static data for Hello World (and this is a comment)

Hello = Hello World!

WeekDays {
        0 = Sunday
        1 = Monday
        2 = Tuesday
        3 = Wednesday
        4 = Thursday
        5 = Friday
        6 = Saturday
}

编写模版文件:hello.cst

<?cs var:Hello ?>


<?cs each:day = WeekDays ?>
    On <?cs var:day ?>, <?cs var:Hello ?> 

<?cs /each ?>
<?cs if:?Query.day ?>
    On <?cs var:WeekDays[Query.day] ?>, <?cs var:Hello ?> 

<?cs /if ?>
Hey <?cs var:html_escape(Query.name) ?>, <?cs var:Hello ?>

这个模版文件唯一要注意的就是cs if:?Query.day，是用来处理链接参数的：cgi-bin/hello.py?day=1

然后将这两部分合二为一：

#!/usr/bin/python
#
# Hello World using the ClearSilver CGI Kit and Python

import neo_cgi

# create a CGI handler context
ncgi = neo_cgi.CGI()
 
# parse the form data (and post upload data)
ncgi.parse()
 
# Load our static data
ncgi.hdf.readFile("hello.hdf")

ncgi.display("hello.cst")

example from http://wiki.woodpecker.org.cn/moin/ClearSilver

Success Stories

• Google Groups 2 - The new version of Google Groups uses ClearSilver. (C++/Python)
• Yahoo Groups! is authored in ClearSilver's ancestor, "CS/HDF". (C, Python)
• For HTML rendering, Trac uses the ClearSilver templating system.
• Discogs - Discogs is a user-built database containing information on artists, labels, and their recordings. (Python)
• Bloglines - Used by the server based RSS aggregator. (C)
• Hassan Image Server - a server for sharing web-browsable photo repositories. (Python)