an anachronistic view of amateur photography in the digital age
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Site Details

Content is being created using simple text files that are processed with scripts written in Ruby, an object oriented scripting language, into HTML. This allows me to separate content (the words and pictures) from presentation (the site look and feel). This separation allows me to create the site using simple text files that have minimum HTML code. The presentation layer is captured in other files that seldom change. All pages have the same look and feel and can be changed depending on the particular 'needs' of the site. The two main sites I support are this one and the the Porsche 912 site. The templates controlling the look and feel are different for each, but the template processing code is the same.

Most of the individual page source files are simple. A recent one was done in support of a question I had on a light leak asked of the Leica Users Group mailing list. The source file l23-24.src was:

PRE [title Light Leak?] [pix l23-24.jpg] This is a particularly bad example of a vexing light leak in my M4-2 which may be occurring when changing lenses. Where does it come from? START

It is all done with templates and the script engine. Templates are text files of a standard form which have the capability of supporting text substitution using keywords and standard format phrases. A simple template might be:

PRE <HTML><HEAD><TITLE>_TITLE_</TITLE> <body> _TEXT_ </body></html> START

From our file l23-24.src you might guess that the _TITLE_ and _TEXT_ parameters might be defined as:
ThisBecomes:
_TITLE_Light Leak?
_TEXT_
[pix l23-24.jpg]

This is a particularly bad example of a vexing light leak in my M4-2 which may be occurring when changing lenses. Where does it come from?

Everywhere in the template that _TITLE_ is found, the value from the source file is substituted. As you can see, the whole mechanism relies on text substitution. Another substitution is the the idea of text expansions using a search and replace algorithm. In the case of our example, [pix l23-24.jpg] is not HTML and is converted to:

PRE <center> <img src='/bw/images/l23-24.jpg' border='2' alt='l23-24.jpg'> </center> START

Real Code

As an example here is the main template:

PRE <HTML><HEAD><TITLE>_TITLE_</TITLE> <META http-equiv=content-type content=text/html;charset=iso-8859-1> <include "style.tpl"> </HEAD> <include "body.tpl"> <include "title.tpl"> <table cellSpacing=0 cellPadding=0 width="100%" border=0 summary=''> <tr><td align=middle width=130 bgColor=#202020>   </td><td align=right bgColor=#202020> <include "intro.tpl"> </td></tr><tr> <td vAlign=top bgColor=#202020> <include "nav.tpl"> </td> <td valign=top height="978" > <p> <table cellSpacing=0 cellPadding=0 width="100%" border=0 summary=''> <tr><td width='10'>   </td><td> _TEXT_ <p align="right">_DATE_ </td></tr></table> </td></tr></table> </body></html> START

Include files are supported:

PRE <include "style.tpl"> START

The site is a working test-bed for WEB ideas.

If you want a copy of the scripts, send me an email. This is not a supported software product so the scripts may or may not be useful to you. The ideas are powerful. The implementation is trivial.

Photographs

All photos were processed using PhotoShop running on Windows 2000. PhotoShop and Microsoft Money are the primary reasons I'm using any Windows software. The rest of the time, it is all Linux.

Hardware/Software

This site is hosted on an inexpensive ($500) eMachines PC running RedHat Linux. The DSL connection allows only 128K upload, so it can not stand much traffic. We currently see about 500 page hits per day most of which are on the Porsche 912 site. There are seldom times when pages are being downloaded by more than one client.

Security

Internet access to the machine is screwed down pretty tight to reduce the number of successful hacker attacks. There was one nearly successful attack using a known ftp buffer overrun exploit. It occurred during a two week period of time that the ftp port was available for my brother to copy some files. It was solved by a combination of upgrades to ftp and removing access to ftp. We track and regularly upgrade OS and application security fixes.

-- Dave Hillman

Last modified: Sat, 29-Sep-01 11:07:54 PDT