;;; blog.el --- A simple org-mode & elnode blog software. ;;; -*- lexical-binding: t; -*- (require 'elnode) (require 'f) ;; Definition of customization options (defgroup elblog nil "Configuration for the Emacs Lisp blog software" :link '(url-link "https://github.com/tazjin/elblog")) (defcustom elblog-port 8010 "Port to run elblog's HTTP server on" :group 'elblog :type 'integer) (defcustom elblog-host "localhost" "Host for elblog's HTTP server to listen on" :group 'elblog :type 'string) (defun configure-org-html-export () "Configure org-mode settings for elblog's HTML templating to work correctly." (setq org-html-postamble t) (setq org-html-doctype "html5") (setq org-html-head-include-scripts nil) (setq org-html-style-default (f-read-text "blog.css")) (setq org-html-preamble-format `(("en" ,(f-read-text "preamble.html")))) (setq org-html-postamble-format `(("en" ,(f-read-text "postamble.html"))))) ;; Article fetching & rendering functions (defun render-org-buffer (buffer &optional force) "Renders an org-mode buffer as HTML and returns the name of the output buffer." (letrec ((input-buffer (get-buffer buffer)) (output-buffer (concat buffer "-rendered")) ;; Don't re-render articles unless forced. (must-render (or force (not (get-buffer output-buffer))))) (if (and input-buffer must-render) (with-current-buffer input-buffer (org-export-to-buffer 'html output-buffer nil nil t))) (if input-buffer output-buffer nil))) (defun get-buffer-string (buffer) "Returns the contents of the specified buffer as a string." (with-current-buffer (get-buffer buffer) (buffer-string))) (defvar-local article-not-found '(404 . "

Oh no, the article was not found.

")) (defvar-local text-html '("Content-Type" . "text/html")) (defun render-article (article) "Renders an article, if it exists." (let ((output-buffer (render-org-buffer (concat article ".org") t))) (if output-buffer `(200 . ,(get-buffer-string output-buffer)) article-not-found))) (defun blog-post-handler (httpcon) "This handler servers a blog post from the configured blog post directory." (let ((response (render-article (elnode-http-mapping httpcon 1)))) (elnode-http-start httpcon (car response) text-html) (elnode-http-return httpcon (cdr response)))) ;; Web server implementation (defvar-local elblog-routes '(("^.*//en/\\(.*\\)" . blog-post-handler))) (defun elblog-handler (httpcon) (elnode-hostpath-dispatcher httpcon elblog-routes)) (defun start-elblog () (interactive) (configure-org-html-export) (elnode-start 'elblog-handler :port elblog-port :host elblog-host)) (defun stop-elblog () (interactive) (elnode-stop elblog-port)) (provide 'elblog)