7 (chicken process-context)
11 (define SERVER-ROOT "public_gemini")
12 (define SERVER-HOST "localhost")
13 (define SERVER-HOST 1965)
16 root-dir host port certfile keyfile)
19 '(("gmi" "text/gemini" "charset=utf-8")
20 ("txt" "text/plain" "charset=utf-8")))
22 (define (process-request config request-line)
24 (let ((uri (uri-normalize-path-segments (absolute-uri request-line))))
26 ((not (eq? (uri-scheme uri) 'gemini))
27 (fail-permanent "Unsupported scheme."))
29 (fail-permanent "URL lacks host name."))
30 ((not (equal? (uri-host uri) (config-host config)))
31 (fail-permanent "Proxy requests forbidden."))
32 ((uri-path-relative? uri)
33 (fail-permanent "Path must be absolute."))
34 ((not (document-available? config uri))
35 (fail-permanent "Document not found."))
37 (serve-document config uri)))))
39 ;; (print ((condition-property-accessor 'exn 'message) o))
40 ;; (fail-permanent "Failed to parse URL."))))
42 (define (fail-permanent reason)
43 (print "50 " reason "\r"))
45 (define (document-available? config uri)
46 (file-exists? (document-path config uri)))
48 (define (document-path config uri)
49 (let* ((crumbs (reverse (cons (config-root-dir config) (cdr (uri-path uri)))))
50 (path (make-pathname (reverse (cdr crumbs)) (car crumbs))))
51 (if (directory-exists? path)
52 (make-pathname path "index.gmi")
55 (define (serve-document config uri)
56 (let* ((path (document-path config uri))
57 (ext (pathname-extension path))
58 (mime-detected (assoc ext file-types))
59 (mime (if mime-detected mime-detected (assoc "txt" file-types)))
60 (mime-type (cadr mime)))
61 (print "20 " (string-intersperse (cdr mime) ";") "\r")
63 ((equal? mime-type "text/gemini") (serve-text-plain path))
64 ((equal? mime-type "text/plain") (serve-text-plain path))
65 (else (serve-binary)))))
67 (define (serve-text-plain path)
68 (with-input-from-file path
70 (let loop ((str (read-string)))
71 (unless (eof-object? str)
73 (loop (read-string)))))))
76 (define (run-server config)
77 (define listener (ssl-listen (config-port config)))
79 (ssl-load-certificate-chain! listener (config-certfile config))
80 (ssl-load-private-key! listener (config-keyfile config))
82 (print "Host: '" (config-host config) "'\n"
83 "Port: '" (config-port config) "'\n"
84 "Root directory: '" (config-root-dir config) "'\n"
85 "Cert file: '" (config-certfile config) "'\n"
86 "Key file: '" (config-keyfile config) "'\n"
88 "Gemini server listening ...")
90 (let-values (((in-port out-port) (ssl-accept listener)))
91 (let ((request-line (read-line in-port)))
92 (with-output-to-port out-port
94 (process-request config request-line))))))
96 (define (print-usage progname)
97 (print "Usage: " progname " [-h] [-p port] server-root-dir hostname certfile keyfile"))
100 (let* ((progname (pathname-file (car (argv))))
101 (config (make-config #f #f 1965 #f #f)))
102 (if (null? (cdr (argv)))
103 (print-usage progname)
104 (let loop ((args (cdr (argv))))
105 (let ((this-arg (car args))
106 (rest-args (cdr args)))
107 (if (string-prefix? "-" this-arg)
109 ((or (equal? this-arg "-h")
110 (equal? this-arg "--help"))
111 (print-usage progname))
112 ((or (equal? this-arg "-p")
113 (equal? this-arg "--port"))
114 (config-port-set! config (string->bumber (car rest-args)))
115 (loop (cdr rest-args)))
117 (print-usage progname)))
119 ((root-dir host certfile keyfile)
120 (config-root-dir-set! config root-dir)
121 (config-host-set! config host)
122 (config-certfile-set! config certfile)
123 (config-keyfile-set! config keyfile)
126 (print "One or more invalid arguments.")
127 (print-usage progname)))))))))