85 lines
3.0 KiB
Common Lisp
85 lines
3.0 KiB
Common Lisp
;;; Copyright 2023, Jaidyn Ann <jadedctrl@posteo.at>
|
||
;;;
|
||
;;; This program is free software: you can redistribute it and/or
|
||
;;; modify it under the terms of the GNU 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 General Public License for more details.
|
||
;;;
|
||
;;; You should have received a copy of the GNU General Public License
|
||
;;; along with this program. If not, see <https://www.gnu.org/licenses/>.
|
||
|
||
(defpackage #:kaptchapelo
|
||
(:use #:cl)
|
||
(:export :start-server))
|
||
|
||
(in-package #:kaptchapelo)
|
||
|
||
|
||
(defun byte-array-to-hex-string (simple-array)
|
||
"Given an array of bytes (integers), return an equivalent string in hex."
|
||
(string-downcase
|
||
(reduce #'str:concat
|
||
(loop for byte across simple-array
|
||
collect (format nil "~2,'0X" byte)))))
|
||
|
||
|
||
(defun random-file (directory &key (file-ext ""))
|
||
(alexandria:random-elt
|
||
(directory (str:concat (format nil "~A" directory)
|
||
"/*"
|
||
(if (not (str:emptyp file-ext))
|
||
(str:concat "." file-ext)
|
||
"")))))
|
||
|
||
|
||
(defun new-captcha-json (captcha-image-uri captcha-text-file)
|
||
"Return the kocaptcha-formed JSON to be returned for a new captcha request."
|
||
(yason:with-output-to-string* ()
|
||
(yason:encode-plist
|
||
(list "md5" (byte-array-to-hex-string captcha-text-file)
|
||
"url" captcha-image-uri
|
||
"token" "This_isnt_actually_used_lol"))))
|
||
|
||
|
||
(defun new-captcha-response (captcha-dir)
|
||
"Create an HTTP response for use with Clack with a new captcha."
|
||
(let* ((captcha-txt-file (random-file captcha-dir :file-ext "txt"))
|
||
(captcha-img-file (str:concat (pathname-name captcha-txt-file) ".png"))
|
||
(captcha-md5-str (byte-array-to-hex-string
|
||
(md5:md5sum-file captcha-txt-file))))
|
||
(list 201 '(:content-type "application/json")
|
||
(list (new-captcha-json (str:concat "/captcha/" captcha-img-file)
|
||
captcha-md5-str)))))
|
||
|
||
|
||
(defun index-response ()
|
||
'(201 (:content-type "text/plain") #p"kaptchapelo.lisp"))
|
||
;; '(201 (:content-type "text/plain") ("You’ve installed Kaptĉapelo! Good work, guy!")))
|
||
|
||
|
||
(defun 404-response ()
|
||
'(404 (:content-type "text/plain") ("No such page.")))
|
||
|
||
|
||
(defun server (env captcha-dir)
|
||
(let* ((uri (quri:uri (getf env :request-uri)))
|
||
(params (quri:uri-query-params uri)))
|
||
(cond ((string= (quri:uri-path uri) "/new")
|
||
(new-captcha-response captcha-dir))
|
||
((or (string= (quri:uri-path uri) "/")
|
||
(string= (quri:uri-path uri) "/index.html"))
|
||
(index-response))
|
||
('t
|
||
(404-response)))))
|
||
|
||
|
||
(defun start-server (&key (captcha-directory #p"captcha/"))
|
||
(clack:clackup
|
||
(lambda (env)
|
||
(funcall #'server env captcha-directory))))
|