1 files changed, 49 insertions, 0 deletions
diff --git a/blog.el b/blog.el
new file mode 100644
index 000000000000..0407f98c6ffe
--- /dev/null
+++ b/blog.el
@@ -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")