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+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
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+
+                            Preamble
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+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..de378c2
--- /dev/null
+++ b/README.md
@@ -0,0 +1,70 @@
+# NAWP (NAWP Ain't WordPress) -- Minimal Blogging Engine in Chicken Scheme
+
+This is very much a work in progress, and not everything is guaranteed
+to work just now.
+
+NAWP stores content in an sqlite database.  It is dynamic, not a static
+site generator.  It is supposed to run as a CGI script.
+
+Here is a list of the external Scheme libraries ("eggs" in Chicken Scheme parlance) that NAWP needs:
+
+* anaphora
+* atom
+* crypt
+* lowdown
+* matchable
+* rfc3339
+* sql-de-lite
+* srfi-1
+* srfi-13
+* sxml-transforms
+* uri-common
+
+I had some problems installing crypt locally; I need to report that upstream.
+
+You'll also need a CGI-capable web server.  I use lighttpd with mod_cgi
+enabled.
+
+Once the dependencies are installed, run:
+```csc nawp.scm```
+
+Copy the resulting binary to your cgi-bin directory.
+
+Next, make the database:
+```sqlite3 /var/lib/nawp/blog.db < schema.sql```
+
+Make it readable and writable by the user the CGI script will run as.
+
+Add a new user.
+Run the script as the owner of the DB, with the adduser argument.
+For instance, to add a user named `chris`:
+
+    doas -u dbowner /path/to/nawp adduser chris 'Chris Brannon'
+
+You'll be prompted for the password.  Unfortunately it'll echo to stdout
+for now.  Fixing that is going to require a little yak-shaving.
+Finally, you'll want to do some web server configuration.  TODO.
+
+## Contributing
+
+To contribute, you can push to branches in this repository that have names
+starting with `patch_`.    I borrowed this idea from Tim Vaughan, author
+of `elpher` et al.  The difference is that Tim Vaughan uses the `git://`
+protocol, where I use `https://`.
+
+## Roadmap
+
+I plan on adding an API.  It will probably be the metaweblog XML-RPC
+API used by WordPress, or a slimmed-down version thereof.  There are
+command-line tools for blogging with WordPress, and it would be nice to
+be able to use those with NAWP.
+
+I may add Gemini support.  I haven't quite decided how I feel about Gemini.
+At first blush, it seems quite compelling and worth the effort.
+
+I may add support for alternative input formats like asciidoc.
+More likely, I'd consider replacing markdown with asciidoc and sticking
+to one single input format.
+Markdown is useful, but it is also poorly specified -- excepting CommonMark -- and underpowered.
+
+Idle speculation: I wonder how hard it would be to add SXML as an output format to pandoc...
diff --git a/nawp.scm b/nawp.scm
new file mode 100755
index 0000000..5da4456
--- /dev/null
+++ b/nawp.scm
@@ -0,0 +1,347 @@
+#!/usr/bin/csi -s
+;;; NAWP (NAWP Ain't WordPress)
+;;; Copyright (C) 2021 Chris Brannon.
+;;;
+;;; This program is free software: you can redistribute it and/or modify
+;;; it under the terms of the GNU Affero General Public License as
+;;; published by the Free Software Foundation, either version 3 of the License,
+;;; or (at your option) any later version.
+;;;
+;;; This program is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU Affero General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Affero General Public License
+;;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+;;;
+;;; Author's email: chris@the-brannons.com
+;;;
+(import
+  anaphora
+  atom
+  (chicken format)
+  (chicken io)
+  (chicken pathname)
+  (chicken port)
+  (chicken process-context)
+  (chicken time)
+  (chicken time posix)
+  crypt
+  lowdown
+  matchable
+  rfc3339
+  sql-de-lite
+  srfi-1
+  srfi-13
+  sxml-transforms
+  uri-common)
+
+(define-anaphor avalues values #:cascade)
+
+(define blog-title "Brannon's Banal Babblings")
+(define blog-description "Insert clever description.")
+(define atom-page-name "feed.atom")
+(define blog-base-uri (uri-reference "https://the-brannons.com/blog/"))
+(define posts-base-uri (uri-relative-to (uri-reference "posts/") blog-base-uri))
+(define feed-uri (uri-relative-to (uri-reference atom-page-name) blog-base-uri))
+(define db-file "/var/lib/nawp/blog.db")
+(define default-author "Chris Brannon")
+
+(define-record post id timestamp slug title author body)
+
+(define (post-body-tree post)
+  (with-input-from-string (post-body post) read))
+
+(define (list-min l)
+  (reduce min (car l) (cdr l)))
+(define (list-max l)
+  (reduce max (car l) (cdr l)))
+
+(define (split-path p)
+  (receive (_ _ parts) (decompose-directory p) (or parts '())))
+
+
+(define (compare-crypted-passwords check against)
+  (string=? (crypt check against) against))
+
+(define (authenticated username password)
+  (call-with-database
+    db-file
+    (lambda (db)
+      (let ((res (query fetch
+		   (sql db
+		     "SELECT password FROM users where username = ?;")
+		   username)))
+	(and (pair? res) (compare-crypted-passwords password (car res)))))))
+
+(define (db-queryer our-db-file)
+  (lambda (statement . args)
+    (call-with-database
+      our-db-file
+      (lambda (db)
+	(apply query (cons fetch-alists (cons (sql db statement) args)))))))
+
+(define (adjust-headings tree)
+  (cond
+    ((null? tree) tree)
+    ((eq? tree 'h1) 'h2)
+    ((eq? tree 'h2) 'h3)
+    ((eq? tree 'h3) 'h4)
+    ((eq? tree 'h4) 'h5)
+    ((eq? tree 'h5) 'h6)
+    ((not (list? tree)) tree)
+    (else (cons (adjust-headings (car tree)) (adjust-headings (cdr tree))))))
+
+
+(define (write-html-page blog-title blog-description canonical-uri feed-uri
+          body #!key (page-title blog-title))
+  (print "Content-type: text/html\n")
+  (print "<!DOCTYPE html>")
+  ;; I stole a lot of this boilerplate stuff from Jekyll.
+  (SXML->HTML
+    `(html
+       (head
+	 (meta (@ (charset "utf-8")))
+	 (meta (@ (http-equiv "X-UA-Compatible")
+		 (content "IE=edge")))
+	 (meta (@ (name "viewport")
+		 (content "width=device-width, initial-scale=1")))
+	 (title ,page-title)
+	 (meta (@ (name "description")
+		 (content ,blog-description)))
+	 (link (@ (rel "canonical") (href ,canonical-uri)))
+	 (link (@ (rel "alternate")
+		 (type "application/rss+xml")
+		 (title ,blog-title)
+		 (href ,feed-uri))))
+       (body ,@body))))
+
+(define (make-ahref uri text)
+  `(a (@ (href ,uri)) ,text))
+
+(define (format-post-date post)
+  (time->string (seconds->local-time
+		  (post-timestamp post)) "%a, %d %b %Y %H:%M:%S %z"))
+
+(define (post-slug-uri post)
+  (uri->string (uri-relative-to (uri-reference (post-slug post)) posts-base-uri)))
+
+(define (format-post-link post #!key (in-list #t))
+  (let ((link (post-slug-uri post)))
+    (if in-list
+      (list
+	'li (make-ahref link
+	      (sprintf "~a: ~a" (format-post-date post) (post-title post))))
+      (make-ahref link (post-title post)))))
+
+(define (transform-for-sxhtml post #!key h1)
+  (cons
+    (if h1
+      (list 'h1 (post-title post))
+      (list 'h2 (format-post-link post in-list: #f)))
+    (cons
+      (list 'p '(@ ("style" "font-size:14px;color:#828282;"))
+	(sprintf "~a - ~a" (format-post-date post) (post-author post))) (post-body-tree post))))
+
+(define (min-post-id)
+  (let ((res
+	  ((db-queryer db-file) "SELECT min(id) as m FROM posts;")))
+    (if (pair? res) (assoc 'm (car res)) 0)))
+
+(define (latest-sxhtml #!key before)
+  (receive (posts stop-offset)
+    (avalues
+      (fetch-latest-posts before)
+      (and (pair? it) (list-min (map post-id it))))
+    (let ((older-link
+	    (if (and stop-offset (> stop-offset (min-post-id))) (list (make-ahref (sprintf "?before=~s" stop-offset) "Older")) '())))
+      (write-html-page
+	blog-title blog-description (uri->string blog-base-uri)
+	(uri->string feed-uri)
+	(append (concatenate (map transform-for-sxhtml posts)) '((br)) older-link
+	  '((br)) (list (make-ahref "all-post-links" "Links to all posts")))))))
+
+(define (all-post-links)
+  (write-html-page
+    blog-title blog-description (uri->string blog-base-uri)
+    (uri->string feed-uri)
+    (list
+      (cons 'ul
+	(map (compose format-post-link row->post)
+	  ((db-queryer db-file) "SELECT slug, title, author, timestamp FROM blog_entries;"))))
+    page-title: (sprintf "~a -- Links to All Posts" blog-title)))
+
+(define seconds->rfc3339-string (compose rfc3339->string seconds->rfc3339))
+
+(define (SXML->HTMLSTRING sxml-expr)
+  (with-output-to-string (lambda () (SXML->HTML sxml-expr))))
+
+(define (atom-entry post)
+  (make-entry
+    id: (post-slug-uri post)
+    updated: (seconds->rfc3339-string (post-timestamp post))
+    title: (make-title (post-title post))
+    content: (make-content (SXML->HTMLSTRING (post-body-tree post)) type: 'html)
+    authors: (list (make-author name: (post-author post)))))
+
+(define (latest-atom)
+  (let ((posts (fetch-latest-posts)))
+    ;; What should an empty feed look like?
+    (when (null? posts) (http-fail 503 "Service unavailable."))
+    (make-atom-doc
+      (make-feed id: "foo" title: (make-title "foo")
+	updated: (seconds->rfc3339-string (list-max (map post-timestamp posts)))
+	entries: (map atom-entry posts)))))
+
+(define (row->post row)
+  (apply make-post
+    (map
+      (lambda (field) (aand (assoc field row) (cdr it)))
+      '(title timestamp slug title author body))))
+
+(define (fetch-latest-posts #!key before)
+  ;; What I really want here is a composable sexp representation of SQL.
+  (let* ((queryer (db-queryer db-file)))
+    (map row->post
+      (if before
+	(queryer "SELECT * FROM blog_entries WHERE id < ? ORDER BY id DESC LIMIT 40;" before)
+	(queryer "SELECT * from blog_entries ORDER BY id DESC LIMIT 40;")))))
+
+(define (add-user username password display-name)
+  (let ((crypted-password (crypt password (crypt-gensalt type: 'sha512))))
+    (call-with-database
+      db-file
+      (lambda (db)
+	(exec
+	  (sql db
+	    "INSERT INTO users (username, password, display_name) VALUES (?,?,?);")
+	  username crypted-password display-name)))))
+
+(define (add-post slug title author body-md)
+  (let ((body-sxhtml-string (sprintf "~s" (adjust-headings (markdown->sxml body-md)))))
+    (call-with-database
+      db-file
+      (lambda (db)
+	(exec
+	  (sql db
+	    "INSERT INTO blog_entries (slug, title, author, body, timestamp) VALUES (?,?,?,?,?);")
+	  slug title author body-sxhtml-string (current-seconds))))))
+
+(define (form-field-value key form)
+  (aand (assoc key form) (cdr it)))
+
+(define (http-fail status message)
+  (print "Content-type: text/html")
+  (printf "Status: ~a\n\n" status)
+  (printf "<html><head><title>Error</title></head><body>~a</body></html\n" message)
+  (exit 0))
+
+(define (http-redirect code uri)
+  (printf "Status: ~a\nContent-type: text/html\nLocation: ~a\n\n"
+    code uri)
+  (printf "<html><head><title>Redirected</title></head><body><a href=\"~a\">click here</a>\n\n" uri)
+  (exit 0))
+
+(define (read-response)
+  (form-urldecode (read-string 3333333)))
+
+(define (send-one-post slug)
+  (let ((post-l ((db-queryer db-file) "SELECT * FROM blog_entries WHERE slug = ?;" slug)))
+    (when (null? post) (http-fail 404 "Post not known."))
+    (let ((post (row->post (car post-l))))
+      (write-html-page
+	blog-title blog-description (uri->string blog-base-uri)
+	(uri->string feed-uri)
+	(transform-for-sxhtml post h1: #t)
+	page-title: (post-title post)))))
+
+(define (lookup-author-name username)
+  (let ((res ((db-queryer db-file) "SELECT display_name FROM users WHERE username = ?" username)))
+    (when (null? res) "unknown")
+    (cdr (assoc 'display_name (car res)))))
+
+(define (make-form-input name #!key (type "text"))
+  (list (sprintf "~a:" (string-titlecase name))
+    `(input (@ (type ,type) (name ,name)))
+    '(br)))
+
+(define post-form
+  `(html
+     (head (title "Write a Post"))
+     (body
+       (form (@ (method "post"))
+	 ,@(make-form-input "username")
+	 ,@(make-form-input "password" type: "password")
+	 ,@(make-form-input "slug")
+	 ,@(make-form-input "title")
+	 "Content:"
+	 (br)
+	 (textarea (@ (name "body")))
+	 (input (@ (type "submit")))))))
+
+(define (route request-method path-info)
+  (match
+    (cons request-method path-info)
+    (("GET")
+      (latest-sxhtml
+	before: (form-field-value
+		  'before (form-urldecode
+			    (get-environment-variable "QUERY_STRING")))))
+    (("GET" "feed.atom")
+      (print "Content-type: application/atom+xml\n")
+      (write-atom-doc (latest-atom )))
+    (("GET" "post-form")
+      (print "Content-type: text/html\n")
+      (SXML->HTML post-form))
+    (("POST" "post-form")
+      (let* ((response (read-response))
+	      (username (form-field-value 'username response))
+	      (password (form-field-value 'password response))
+	      (slug (form-field-value 'slug response))
+	      (title (form-field-value 'title response))
+	      (author (lookup-author-name username))
+	      (body (form-field-value 'body response)))
+	(when (not (and username password slug title author body))
+	  (http-fail 400 "Bad request."))
+	(unless (authenticated username password)
+	  (http-fail 403 "Bad credentials."))
+	(add-post slug title author body)
+	(http-redirect 303 (uri->string blog-base-uri))))
+    (("GET" "posts" slug)
+      (send-one-post slug))
+    (("GET" "all-post-links") (all-post-links))
+    (everything-else
+      (http-fail 400 "Bad request."))))
+
+(define (cgi-main)
+  (let (
+	 (path-info
+	   (split-path (string-trim-both
+			 (or (get-environment-variable "PATH_INFO") "/")
+			 #\/)))
+	 (request-method (get-environment-variable "REQUEST_METHOD")))
+    (route request-method path-info)))
+
+;; We should use stty for this, but the stty egg appears broken on musl
+;; for now.  I use musl.
+(define (read-password prompt)
+  (display prompt)
+  (flush-output)
+  ;;  (with-stty '(not echo) read-line))
+  (read-line))
+
+(define (help)
+  (let ((program-base (pathname-file (program-name))))
+    (printf "Usage: ~a adduser USERNAME DISPLAY-NAME\n" program-base)
+    (print "    adds a new user, prompting for the password.\n")
+    (print "If this program is called without arguments, it operates in CGI mode.\n")))
+
+(define (main)
+  (match (command-line-arguments)
+    (() (cgi-main))
+    ((adduser username display-name)
+      (add-user username (read-password "Password: ") display-name))
+    (everything-else (help))))
+
+(main)
diff --git a/schema.sql b/schema.sql
new file mode 100644
index 0000000..23e4d71
--- /dev/null
+++ b/schema.sql
@@ -0,0 +1,12 @@
+CREATE TABLE blog_entries (
+    ID INTEGER PRIMARY KEY AUTOINCREMENT,
+    timestamp INTEGER,
+    slug TEXT UNIQUE NOT NULL,
+    title TEXT,
+    author TEXT,
+    body TEXT);
+
+CREATE TABLE users (
+    username VARCHAR(20) PRIMARY KEY,
+    password VARCHAR(255),
+    display_name VARCHAR(255));