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Emacs-CGI

A simple library of the Common Gateway Interface for Emacs-lisp, allowing you to service requests for non static web pages in elisp.

Features:

  • Generate dynamic page with EML;
  • Embed elisp as script-lets (just like JSP, PHP, etc.);
  • Decode parameters from GET- and POST-type CGI requests;
  • Access Cookie;
  • Access Session;
  • `Include' instruction to load sub-pages;
  • Redirect/Forward instruction for page jump;
  • Access Database with EDBC.

Here is a sample for elisp CGI script, place it in your web server's CGI directory (typically called something like /var/www/cgi-bin/):

#!/usr/local/bin/emacs --script

(princ "Content-Type: text/html; charset=UTF-8\r\n\r\n")
(princ "<h1>Hello Emacs Lisp</h1>\n")

A fabonacci sample.

#!/usr/local/bin/emacs --script

(require 'cgi)

(cgi/cookie "n"
 (or (cgi/param "n")
     (cgi/cookie "n")
     "15"))

(html
 (head
  (title "Fabonacci 1 -&gt; n")
  (meta (http-equiv . "Content-Type")
        (content . "text/html; charset=UTF-8")))
 (body
  (form (method . post)
   (span "n = ")
   (input (type . text) (name . n))
   (button (type . submit) "Submit"))
  (table (border . 1) (width . "100%")
   (thead
    (caption "Fabonacci")
    (tr
     (th "#")
     (th "Value")))
   (tbody
    <%
    (let ((a 0) (b 1) x)
      (dotimes (i (string-to-number
                   (cgi/cookie "n")))
        (tr
         (td <%= (1+ i) %>)
         (td <%= (setq x a a b b (+ x b)) %>))))
    %>))))

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Using Emacs Lisp for CGI scripting

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