Re: Server Side Includes/HTML + scripting

[Noah Mapstead <noah@peacekeeper.com>]

Hi James,

Back in 99 I was working with Etienne on duplicating a web scripting
language that was created in 95.  The company had gone out of business. 
The language was based on lisp.  The source including the grammar is
available at http://www.peacekeeper.com/temp/opensmx.zip

The language was fairly full-featured for its day but ultimately it was
easier to use other more popular languages.  One of these days I will
finish it for posterity's sake.

A few samples are below.

My ip is %client-ip%.
output "My ip is 127.0.0.1."

2 + 2 + 3 = %add(2,2,3)
output "2 + 2 + 3 = 7"

%set(a,red)
%if((%equal(%a%,red),true,false)
output "true"

There is no <% %> in the language.  It is fully meshed with the text. 
Everything is treated as a string.

I can't tell you anything technical about the SableCC side of the
language.  But I can answer questions regarding its usage.

Thanks
-Noah


James Buchanan wrote:
> 
> Hi,
> 
> Can someone please give me some tips on how I might implement a parser
> for a program that processes server side includes (SSI) or a mini
> language that can be interspersed throughout an HTML file?
> 
> E.g. for SSI:
> 
> <!--#exec cmd="/bin/foo"-->
> <p>Hi. Document root is: <!--#var name="$DOCUMENT_ROOT"--></p>
> 
> <!--#if expr="$foo == $bar" -->
>    <h3>My homepage</h3>
> <!--#else -->
>    <h3>My new homepage</h3>
> <!--#endif -->
> 
> ... or very similar to this.
> 
> For something like PHP or ASP:
> 
> <%
>         statments...
> %>
> 
> <%= var %>      ; Direct output
> 
> <% if foo.length() > 0 then %>
>         <b>foo's length is greater than 0!</b>
> <% endif %>
> 
> The programming commands can mix in with the HTML by having the
> statments inside special tags the parser picks up.  It would need to
> associate the next block of HTML with the tag if it's a conditional,
> otherwise it gets sent out after processing the command tag(s).
> 
> I'm not exactly sure how I could do this. The nodes that get built after
> the parser builds the parse tree might have a link to a node that holds
> HTML to output.  It would need to be able to find the extra nodes that
> it wants to end if statements and such, so it can skip elseif parts.
> Similar for looping constructs.
> 
> Node: <% stuff %>
> HTMLNode (just print it out)
> Node: <%= varname %>
> HTMLNode (just print it out)
> Node: <% morestuff %>
> 
> Any ideas for a grammar that I can make with SableCC?
> 
> Thanks,
> James

-- 
***********************************************************
Noah Mapstead  -  noah@peacekeeper.com        

Chief Technology Officer                   
Peacekeeper Enterprises, LLC http://www.peacekeeper.com

Check out our new site: http://www.donationtree.com
160+ stores rebate a portion of each purchase to a charity, school, or
college savings plan.