mdebray/tvl-depot
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

feat(blog): Add initial elblog implementation

Browse source 
Implements a (very) simple "blogging" software in Emacs Lisp using
org-mode and elnode.

Once loaded and started, elblog will serve individual blog posts at
`localhost:8010/en/$post-name`, where "post-name" can be any string.

Elblog will attempt to find a buffer called "$post-name.org" and
render it to HTML.

An index of blog posts is currently not implemented and everything is
completely unthemed, but for a language this old this is ridiculously
productive given the amount of code.
This commit is contained in:
Vincent Ambo 2017-11-12 23:48:21 +01:00
parent e2c4755426
commit 3d4aba1803
1 changed files with 49 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

49
blog.el Normal file
View file

@ -0,0 +1,49 @@
;;; blog.el --- A simple org-mode & elnode blog software.
;;; -*- lexical-binding: t; -*-
(require 'elnode)
(require 'f)
(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 . "<html><body><p>Oh no, the article was not found.</p></body></html>"))
(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"))))
(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))))
(defvar-local elblog-routes
'(("^.*//en/\\(.*\\)" . blog-post-handler)))
(defun elblog-handler (httpcon)
(elnode-hostpath-dispatcher httpcon elblog-routes))
(elnode-start 'elblog-handler
:port 8010
:host "localhost")