+(define (serve-document config uri)
+ (let* ((path (document-path config uri))
+ (ext (pathname-extension path))
+ (mime-detected (assoc ext file-types))
+ (mime (if mime-detected mime-detected (assoc "txt" file-types)))
+ (mime-type (cadr mime)))
+ (print "20 " (string-intersperse (cdr mime) ";") "\r")
+ (cond
+ ((equal? mime-type "text/gemini") (serve-dynamic-gemini path))
+ ((equal? mime-type "text/plain") (serve-text-plain path))
+ (else (serve-binary)))))
+
+(define (serve-text-plain path)
+ (with-input-from-file path
+ (lambda ()
+ (let loop ((str (read-string)))
+ (unless (eof-object? str)
+ (print* str)
+ (loop (read-string)))))))
+
+(define (serve-dynamic-gemini path)
+ (with-input-from-file path
+ (lambda ()
+ (let loop ((c (peek-char)))
+ (if (eof-object? c)
+ 'done
+ (begin
+ (if (eq? c #\,)
+ (begin
+ (read-char)
+ (serve-dynamic-element (read) (pathname-directory path))
+ (read-line))
+ (print (read-line)))
+ (loop (peek-char))))))))
+
+(define (serve-dynamic-element element working-directory)
+ (match element
+ (('eval expression)
+ (with-current-working-directory
+ working-directory
+ (lambda ()
+ (eval expression))))
+ (('shell command)
+ (with-current-working-directory
+ working-directory
+ (lambda ()
+ (let-values (((in-port out-port id) (process command)))
+ (let ((string (read-string #f in-port)))
+ (unless (eof-object? string)
+ (print string))
+ (close-input-port in-port)
+ (close-output-port out-port))))))
+ (else (error "Unknown element type."))))
+
+(define (with-current-working-directory directory thunk)
+ (let ((old-wd (current-directory))
+ (result 'none))
+ (condition-case
+ (begin
+ (change-directory directory)
+ (set! result (thunk))
+ (change-directory old-wd)
+ result)
+ (o (exn)
+ (change-directory old-wd)
+ (signal o)))))
+
+
+(define (run-server config)
+ (define listener (ssl-listen* hostname: (config-host config)
+ port: (config-port config)
+ certificate: (config-certfile config)
+ private-key: (config-keyfile config)))
+
+ (print "Host: '" (config-host config) "'\n"
+ "Port: '" (config-port config) "'\n"
+ "Root directory: '" (config-root-dir config) "'\n"
+ "Cert file: '" (config-certfile config) "'\n"
+ "Key file: '" (config-keyfile config) "'\n"
+ "\n"
+ "Gemini server listening ...")
+
+ (server-loop listener config))
+
+(define (server-loop listener config)
+ (let-values (((in-port out-port) (ssl-accept listener)))
+ (let-values (((local-ip remote-ip) (tcp-addresses (ssl-port->tcp-port in-port))))
+ (print "Accepted connection from " remote-ip
+ " on " (seconds->string))
+ (condition-case
+ (let ((request-line (read-line in-port)))
+ (print* "Serving request '" request-line "' ... ")
+ (with-output-to-port out-port
+ (lambda ()
+ (process-request config request-line)))
+ (print "done."))
+ (o (exn)
+ (print-error-message o))))
+ (close-input-port in-port)
+ (close-output-port out-port))
+ (server-loop listener config))
+
+
+(define (print-usage progname)
+ (print "Usage: " progname " [-h] [-p port] server-root-dir hostname certfile keyfile"))
+
+(define (main)
+ (let* ((progname (pathname-file (car (argv))))
+ (config (make-config #f #f 1965 #f #f)))
+ (if (null? (cdr (argv)))
+ (print-usage progname)
+ (let loop ((args (cdr (argv))))
+ (let ((this-arg (car args))
+ (rest-args (cdr args)))
+ (if (string-prefix? "-" this-arg)
+ (cond
+ ((or (equal? this-arg "-h")
+ (equal? this-arg "--help"))
+ (print-usage progname))
+ ((or (equal? this-arg "-p")
+ (equal? this-arg "--port"))
+ (config-port-set! config (string->bumber (car rest-args)))
+ (loop (cdr rest-args)))
+ (else
+ (print-usage progname)))
+ (match args
+ ((root-dir host certfile keyfile)
+ (config-root-dir-set! config root-dir)
+ (config-host-set! config host)
+ (config-certfile-set! config certfile)
+ (config-keyfile-set! config keyfile)
+ (run-server config))
+ (else
+ (print "One or more invalid arguments.")
+ (print-usage progname)))))))))