factor/library/httpd/responder.factor

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2004-07-16 02:26:21 -04:00
!:folding=indent:collapseFolds=0:
! $Id$
!
! Copyright (C) 2004 Slava Pestov.
!
! Redistribution and use in source and binary forms, with or without
! modification, are permitted provided that the following conditions are met:
!
! 1. Redistributions of source code must retain the above copyright notice,
! this list of conditions and the following disclaimer.
!
! 2. Redistributions in binary form must reproduce the above copyright notice,
! this list of conditions and the following disclaimer in the documentation
! and/or other materials provided with the distribution.
!
! THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
! INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
! FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
! DEVELOPERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
! SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
! PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
! OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
! WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
! OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
! ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
IN: httpd-responder
USE: combinators
USE: lists
USE: logging
USE: namespaces
USE: stdio
USE: stack
USE: streams
USE: strings
USE: httpd
: <responder> ( -- responder )
<table> [
[
drop "GET method not implemented" httpd-error
] "get" set
[
drop "POST method not implemented" httpd-error
] "post" set
] extend ;
: serving-html ( -- )
"200 Document follows" "text/html" response print ;
: serving-text ( -- )
"200 Document follows" "text/plain" response print ;
: get-responder ( name -- responder )
"httpd-responders" get [ get ] bind ;
: responder-argument ( argument -- argument )
dup f-or-"" [ drop "default-argument" get ] when ;
: call-responder ( method argument responder -- )
[ responder-argument swap get call ] bind ;
: no-such-responder ( name -- )
"404 no such responder: " swap cat2 httpd-error ;
: bad-responder-query ( argument -- )
"404 missing parameter" httpd-error ;
: trim-/ ( url -- url )
#! Trim a leading /, if there is one.
dup "/" str-head? dup [ nip ] [ drop ] ifte ;
: log-responder ( argument -- )
"Calling responder " swap cat2 log ;
: serve-responder ( argument method -- )
swap
trim-/
dup "/" split1 dup [
nip unswons dup get-responder dup [
swap log-responder call-responder
] [
drop nip nip no-such-responder
] ifte
] [
3drop bad-responder-query
] ifte ;