factor/basis/urls/encoding/encoding.factor

97 lines
2.1 KiB
Factor

! Copyright (C) 2008 Slava Pestov.
! See http://factorcode.org/license.txt for BSD license.
USING: kernel ascii combinators combinators.short-circuit
sequences splitting fry namespaces make assocs arrays strings
io.sockets io.sockets.secure io.encodings.string
io.encodings.utf8 math math.parser accessors hashtables present ;
IN: urls.encoding
: url-quotable? ( ch -- ? )
{
[ letter? ]
[ LETTER? ]
[ digit? ]
[ "/_-.:" member? ]
} 1|| ; foldable
<PRIVATE
: push-utf8 ( ch -- )
1string utf8 encode
[ CHAR: % , >hex 2 CHAR: 0 pad-left % ] each ;
PRIVATE>
: url-encode ( str -- encoded )
[
[ dup url-quotable? [ , ] [ push-utf8 ] if ] each
] "" make ;
<PRIVATE
: url-decode-hex ( index str -- )
2dup length 2 - >= [
2drop
] [
[ 1+ dup 2 + ] dip subseq hex> [ , ] when*
] if ;
: url-decode-% ( index str -- index str )
2dup url-decode-hex ;
: url-decode-iter ( index str -- )
2dup length >= [
2drop
] [
2dup nth dup CHAR: % = [
drop url-decode-% [ 3 + ] dip
] [
, [ 1+ ] dip
] if url-decode-iter
] if ;
PRIVATE>
: url-decode ( str -- decoded )
[ 0 swap url-decode-iter ] "" make utf8 decode ;
: query-decode ( str -- decoded )
[ dup CHAR: + = [ drop "%20" ] [ 1string ] if ] { } map-as
concat url-decode ;
<PRIVATE
: add-query-param ( value key assoc -- )
[
at [
{
{ [ dup string? ] [ swap 2array ] }
{ [ dup array? ] [ swap suffix ] }
{ [ dup not ] [ drop ] }
} cond
] when*
] 2keep set-at ;
PRIVATE>
: query>assoc ( query -- assoc )
dup [
"&;" split H{ } clone [
[
[ "=" split1 [ dup [ query-decode ] when ] bi@ swap ] dip
add-query-param
] curry each
] keep
] when ;
: assoc>query ( assoc -- str )
[
dup array? [ [ present ] map ] [ present 1array ] if
] assoc-map
[
[
[ url-encode ] dip
[ url-encode "=" swap 3append , ] with each
] assoc-each
] { } make "&" join ;