+++ /dev/null
-(import (chicken tcp)
- (chicken port)
- (chicken io)
- (chicken string)
- (chicken pathname)
- (chicken file posix)
- (chicken time posix)
- (chicken condition)
- (chicken process)
- (chicken process-context)
- srfi-13)
-
-(define gopher-index-file-name "index")
-
-;;; Server loop
-;; We don't actually use worker threads here to handle requests,
-;; the server just blocks until the first request is finished.
-
-(define (make-server-config root-dir host port)
- (list root-dir host port))
-
-(define (server-root-dir config) (list-ref config 0))
-(define (server-host config) (list-ref config 1))
-(define (server-port config) (list-ref config 2))
-
-(define (run-server config)
- (print "Gopher server listening on port " (server-port config) " ...")
- (let ((listener (tcp-listen (server-port config))))
- (let server-loop ()
- (let-values (((in-port out-port) (tcp-accept listener)))
- (let* ((line (read-line in-port))
- (selector (string-trim-both line)))
- (let-values (((local-ip remote-ip) (tcp-addresses in-port)))
- (print "Accepted connection from " remote-ip
- " on " (seconds->string)))
- (condition-case
- (begin
- (with-output-to-port out-port
- (lambda ()
- (serve-selector (if (= (string-length selector) 0)
- "/"
- selector)
- config)))
- (print "... served selector '" selector "'. Closing connection."))
- (o (exn)
- (print-error-message o out-port)
- (print-error-message o)
- (print "Error while attempting to serve selector " selector "."))))
- (close-input-port in-port)
- (close-output-port out-port))
- (server-loop))
- (tcp-close listener)))
-
-
-;;; Selector retrieval
-
-(define (directory-selector? selector)
- (string-suffix? "/" selector))
-
-(define (text-selector? selector)
- (apply or (map (lambda (ext) (string-suffix? ext selector))
- '(".txt" ".org" ".md"))))
-
-(define (serve-selector selector config)
- ((cond
- ((directory-selector? selector) serve-directory)
- ((text-selector? seletor) serve-text-file)
- (else serve-binary-file))
- selector config))
-
-(define (serve-directory path config)
- (let ((file-name (make-pathname (list (server-root-dir config) path)
- gopher-index-file-name)))
- (if (regular-file? file-name)
- (with-input-from-file file-name
- (lambda ()
- (let loop ((c (peek-char)))
- (if (eof-object? c)
- 'done
- (begin
- (if (eq? c #\,)
- (begin
- (read-char)
- (serve-record (read) path config)
- (read-line))
- (serve-info-record (read-line)))
- (loop (peek-char)))))))
- (error "Index file not found."))))
-
-(define (serve-text-file path config)
- (let ((file-name (make-pathname (server-root-dir config) path)))
- (if (regular-file? file-name)
- (with-input-from-file file-name
- (lambda ()
- (for-each
- (lambda (line)
- (print line "\r"))
- (read-lines))))
- (error "File not found." file-name))))
-
-(define (serve-binary-file path config)
- (let ((file-name (make-pathname (server-root-dir config) path)))
- (if (regular-file? file-name)
- (with-input-from-file file-name
- (lambda ()
- (let loop ((b (read-byte)))
- (if (eof-object? b)
- 'done
- (begin
- (write-byte b)
- (loop (read-byte)))))))
- (error "File not found." file-name))))
-
-
-;;; Index rendering
-
-(define (serve-info-record info-string)
- (print "i" info-string "\tfake\tfake\t1\r"))
-
-;;; main
-
-(define (main)
- (let ((progname (car (argv)))
- (args (cdr (argv))))
- (if (or (< (length args) 2)
- (equal? (car args) "-h")
- (equal? (car args) "--help"))
- (print "Usage:\n"
- progname " -h/--help\n"
- progname " gopher-root-dir server-hostname server-port")
- (let ((root (car args))
- (hostname (cadr args))
- (port (if (= (length args) 3) (string->number (caddr args)) 70)))
- (if port
- (run-server (make-server-config root hostname port))
- (error "Invalid port argument." port))))))
-
-(main)
-
-;; (define (test)
- ;; (run-server (make-server-config "gopher-root" "localhost" 70)))
-
-;; (test)