LSP
LSP (Lisp Server Pages) is an HTML template library.

LSP is copyright I/NET and is licensed under the MIT License. It was written by John Wiseman, who discusses it in this blog post.

ASDF-install package (obsolete) http://lemonodor.com/code/lsp_1.1.tar.gz

LSP is designed to work with a separate web server library. The code comes with support for both the AllegroServe and Araneida servers, but it shouldn't be difficult to add support for other libraries (see lsp-aserve.lisp and lsp-allegroserve.lisp from the distribution for examples).

LSP itself should be portable ANSI Lisp code that will run in any Lisp implementation.

Example of publishing an LSP file:

(publish-lsp :path "/temperature.html"
             :file "/Users/wiseman/src/temperature.lsp"
             :server *my-server-or-http-listener*)

Example of an LSP file:

<html>
<head>
<title>LSP Example (AllegroServe)</title>
</head>
<body>
<h1>LSP Example</h1>

<h2>User Agent</h2>
<%=
  (:princ-safe (or (net.aserve:header-slot-value request
						 :user-agent)
		   "None."))
%>

<h2>Referrer</h2>
<%=
  (:princ-safe (or (net.aserve:header-slot-value request
						 :referer)
		   "None."))
%>

<h2>Query Variables</h2>
<table>
<%
(let ((queries (request-query request)))
  (if (null queries)
    (html (:tr (:td "None.")))
    (dolist (query queries)
      (html
       (:tr (:td (:princ-safe (car query)))
	    (:td (:princ-safe (cdr query))))))))
%>
</table>

<h2>Loop Of Dynamism</h2>

<% (dotimes (i (+ (random 10) 1)) %>
  Hi!<br>
<% ) %>
</body>
</html>

CL-EMB uses some code from LSP, but does more. However, it requires passing the "environment" as a plist to the rendering function. See the README for CL-EMB.

Hunchentoot LSP is a port of LSP that target the Hunchentoot webserver

See http://sourceforge.net/projects/lsp for a more serious attempt at doing this right, by Sunil Mishra and Tim Bradshaw.