;;; HTTP messages
-;; Copyright (C) 2010, 2011 Free Software Foundation, Inc.
+;; Copyright (C) 2010, 2011, 2012 Free Software Foundation, Inc.
;; This library is free software; you can redistribute it and/or
;; modify it under the terms of the GNU Lesser General Public
(define (write-header sym val port)
"Writes the given header name and value to @var{port}. If @var{sym}
is a known header, uses the specific writer registered for that header.
-Otherwise the value is written using @var{display}."
+Otherwise the value is written using @code{display}."
(display (header->string sym) port)
(display ": " port)
((header-writer sym) val port)
port)
(display-digits (date-day date) 2 port)
(display (case (date-month date)
- ((1) " Jan ") ((2) " Feb ") ((3) " Ma ")
+ ((1) " Jan ") ((2) " Feb ") ((3) " Mar ")
((4) " Apr ") ((5) " May ") ((6) " Jun ")
((7) " Jul ") ((8) " Aug ") ((9) " Sep ")
((10) " Oct ") ((11) " Nov ") ((12) " Dec ")
(display-digits (date-second date) 2 port)
(display " GMT" port)))
-(define (write-uri uri port)
- (display (uri->string uri) port))
-
(define (parse-entity-tag val)
(if (string-prefix? "W/" val)
(cons (parse-qstring val 2) #f)
"Write the first line of an HTTP request to @var{port}."
(display method port)
(display #\space port)
- (write-uri uri port)
+ (let ((path (uri-path uri))
+ (query (uri-query uri)))
+ (if (not (string-null? path))
+ (display path port))
+ (if query
+ (begin
+ (display "?" port)
+ (display query port)))
+ (if (and (string-null? path)
+ (not query))
+ ;; Make sure we display something.
+ (display "/" port)))
(display #\space port)
(write-http-version version port)
(display "\r\n" port))
(declare-key-value-list-header! "Cache-Control"
(lambda (k v-str)
(case k
- ((max-age max-stale min-fresh s-maxage)
+ ((max-age min-fresh s-maxage)
(parse-non-negative-integer v-str))
+ ((max-stale)
+ (and v-str (parse-non-negative-integer v-str)))
((private no-cache)
(and v-str (split-header-names v-str)))
(else v-str)))
(lambda (k v)
(case k
- ((max-age max-stale min-fresh s-maxage)
+ ((max-age min-fresh s-maxage)
(non-negative-integer? v))
+ ((max-stale)
+ (or (not v) (non-negative-integer? v)))
((private no-cache)
(or (not v) (list-of-header-names? v)))
+ ((no-store no-transform only-if-cache must-revalidate proxy-revalidate)
+ (not v))
(else
- (not v))))
+ (or (not v) (string? v)))))
(lambda (k v port)
(cond
- ((string? v) (display v port))
+ ((string? v) (default-val-writer k v port))
((pair? v)
(display #\" port)
(write-header-list v port)
;; Expires = HTTP-date
;;
-(declare-date-header! "Expires")
+(define *date-in-the-past* (parse-date "Thu, 01 Jan 1970 00:00:00 GMT"))
+
+(declare-header! "Expires"
+ (lambda (str)
+ (if (member str '("0" "-1"))
+ *date-in-the-past*
+ (parse-date str)))
+ date?
+ write-date)
;; Last-Modified = HTTP-date
;;