feat: send file and manage some errors

Redirect if url has no path
Error if file not found
Send file index.gmi if path is /
Serve all gemini files in www/

server.scm

@@ -14,32 +14,66 @@
 ;; You should have received a copy of the GNU General Public License along with
 ;; this program. If not, see <https://www.gnu.org/licenses/>.
 
-;;( use-modules (gnutls) )
-(use-modules (ice-9 binary-ports) (ice-9 iconv) (rnrs bytevectors))
+;;(use-modules (gnutls))
+(use-modules (ice-9 binary-ports) (ice-9 iconv) (rnrs bytevectors) (web uri) (ice-9 textual-ports))
 
+(define port 8080) ;; 1965)
+(define nom "localhost")
 (define chaussette (socket PF_INET SOCK_STREAM 0))
 (bind chaussette AF_INET INADDR_ANY 8081)
 (listen chaussette 1)
 (display "Chaussette en place")
 (newline)
+
 (while #t 
     (let (( rep (accept chaussette )))
     (let ((out (car rep)) (in (cdr rep)))
-    (define text (make-bytevector 1024))
+    (define byte-buff (make-bytevector 1024))
     (define pos #f)
-    (recvfrom! out text)
+    (define url "")
+    (recvfrom! out byte-buff)
+    (set! url (bytevector->string byte-buff "UTF-8"))
+    ;; position du CRLF dans l'url demandé
+    (set! pos (string-contains url (string #\return #\nl)))
 
-    (set! pos (string-contains (bytevector->string text "UTF-8") 
-        (string #\return #\nl)))
-
-    ;; si ya pas de \cr\nl, buffer trop grand ou mal formaté
+    ;; si ya pas de \cr\nl, buffer trop grand ou url mal formatée
     (if (not pos)
-        (display (string-append "59 Bad Request" (string #\return #\nl)) out)
-        (display "all ok")
-    )
+        ;; TODO message about error
+        (display (string-append "59 Bad Request" (string #\return #\nl)) out))
+        ;; on parse l'url
+        (begin (let ((url-parse (string->uri (substring url 0 pos))))
+        (if (not url-parse)
+            (display (string-append "59 Bad Request" (string #\return #\nl)) out))
+            (begin
+            ;; on vérifie que c'est bien le protocole gemini
+            (if (eq? (quote gemini) (uri-scheme url-parse))
+                (begin (let ((path (uri-path url-parse)))
+
+                    (if (string=? path "")
+                        ;; si ya pas de chemin, on redirige vers / (l'index)
+                        (display (string-append "31 gemini://" nom "/" (string #\return #\nl)) out)
+                        (begin 
+                            (if (string=? path "/") (set! path "/index.gmi"))
+                            ;; on rajoute le chemin du dossier contenant les fichiers
+                            (set! path (string-append "www" path))
+                            ;; si on a accès au fichier, on l'envoie, sinon pas trouvé
+                            (if (access? path R_OK)  
+                                (display (string-append "20 text/gemini" (string #\return #\nl)
+                                    (get-string-all (open-file path "r"))) out)
+                                (display (string-append "51 Not Found" (string #\return #\nl)) out)
+                            )
+                        )
+                    )
+                ))
+
+                (display (string-append "53 Proxy Request Refused" (string #\return #\nl)) out)
+            )
+        )
+    ))
 
     (shutdown out 2)
-)))
+    )
+))
 
 (close chaussette)
 (display "Atterissage réussi")