Primordial responder loop

1 files changed, 56 insertions, 0 deletions

diff --git a/weeb/main.scm b/weeb/main.scm
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+++ b/weeb/main.scm
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+;;; Weeb --- Web microframework for GNU Guile
+;;; Copyright © 2026 Jakob Kreuze <zerodaysfordays@sdf.org>
+;;;
+;;; This file is part of Weeb.
+;;;
+;;; Weeb 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.
+;;;
+;;; Weeb 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 Weeb. If not, see <https://www.gnu.org/licenses/>.
+
+(define-module (weeb main)
+  #:use-module (ice-9 match)
+  #:use-module (ice-9 regex)
+  #:use-module (srfi srfi-1)
+  #:use-module (weeb fcgi)
+  #:use-module (weeb request)
+  #:use-module (weeb struct)
+  #:export (weeb main))
+
+(define (receive-request)
+  (define string->method
+    (match-lambda
+      (("GET"  'GET)
+       ("POST" 'POST))))
+  ;; According to RFC 9110, header names must be treated as case-insensitive.
+  (define headers
+    (filter-map
+     (lambda (var)
+       (let ((match-object (string-match "HTTP_(.*)=(.*)" var)))
+         (if match-object
+             `(,(string->symbol
+                 (string-downcase
+                  (string-map (lambda (c) (if (char=? c #\_) #\- c))
+                              (match:substring match-object 1))))
+               .
+               ,(match:substring match-object 2))
+             #f)))
+     (environ)))
+  (let* ((method (getenv "REQUEST_METHOD"))
+         (uri    (getenv "REQUEST_URI")))
+    (make-struct <request> method uri '() headers (fcgi-read))))
+
+(define (run-server)
+  (while (zero? (fcgi-accept))
+    (let ((request (receive-request)))
+      (with-accessors (request method uri headers body)
+        (fcgi-display "Content-type: text/html\r\n\r\n")
+        (fcgi-display (format #f "~a" headers))))))