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! Copyright (C) 2014 John Benediktsson
! See http://factorcode.org/license.txt for BSD license
USING: accessors byte-arrays calendar colors.constants
combinators formatting fry images images.loader
images.loader.private images.viewer io io.encodings.binary
io.encodings.string io.encodings.utf8 io.sockets io.styles
io.timeouts kernel make math math.parser namespaces present
prettyprint sequences splitting summary urls urls.encoding
vocabs ;
IN: gopher
<PRIVATE
CONSTANT: A_TEXT CHAR: 0
CONSTANT: A_MENU CHAR: 1
CONSTANT: A_CSO CHAR: 2
CONSTANT: A_ERROR CHAR: 3
CONSTANT: A_MACBINHEX CHAR: 4
CONSTANT: A_PCBINHEX CHAR: 5
CONSTANT: A_UUENCODED CHAR: 6
CONSTANT: A_INDEX CHAR: 7
CONSTANT: A_TELNET CHAR: 8
CONSTANT: A_BINARY CHAR: 9
CONSTANT: A_DUPLICATE CHAR: +
CONSTANT: A_SOUND CHAR: s
CONSTANT: A_EVENT CHAR: e
CONSTANT: A_CALENDAR CHAR: c
CONSTANT: A_HTML CHAR: h
CONSTANT: A_TN3270 CHAR: T
CONSTANT: A_MIME CHAR: M
CONSTANT: A_IMAGE CHAR: I
CONSTANT: A_WHOIS CHAR: w
CONSTANT: A_QUERY CHAR: q
CONSTANT: A_GIF CHAR: g
CONSTANT: A_WWW CHAR: w
CONSTANT: A_PLUS_IMAGE CHAR: :
CONSTANT: A_PLUS_MOVIE CHAR: ;
CONSTANT: A_PLUS_SOUND CHAR: <
: gopher-get ( selector -- item-type byte-array )
"/" split1 "" or
[ dup length 1 > [ string>number ] [ first ] if ]
[
"?" split1 [ "\t" glue ] when*
"\r\n" append utf8 encode write flush contents
] bi* ;
PRIVATE>
ERROR: not-a-gopher-url url ;
: gopher ( url -- item-type byte-array )
dup url? [ >url ] unless
dup protocol>> "gopher" = [ not-a-gopher-url ] unless {
[ host>> ]
[ port>> 70 or <inet> binary ]
[ path>> rest [ "1/" ] when-empty ]
[ query>> [ assoc>query url-decode "?" glue ] when* ]
} cleave '[
1 minutes input-stream get set-timeout
_ gopher-get
] with-client ;
<PRIVATE
TUPLE: gopher-link type name selector host port ;
M: gopher-link summary >url present ;
: <gopher-link> ( item -- gopher-link )
unclip swap "\t" split first4 gopher-link boa ;
M: gopher-link >url
dup type>> CHAR: h = [
selector>> "URL:" ?head drop
] [
{
[ host>> ] [ port>> ] [ type>> ] [ selector>> ]
} cleave "gopher://%s:%s/%s%s" sprintf
] if >url ;
: gopher-link. ( gopher-link -- )
dup type>> CHAR: i = [
name>> print
] [
[ name>> ] keep [
presented ,,
COLOR: blue foreground ,,
] H{ } make format nl
] if ;
: gopher-text ( object -- lines )
utf8 decode string-lines { "." } split1 drop ;
: gopher-text. ( object -- )
gopher-text [ print ] each ;
: gopher-gif. ( object -- )
"gif" (image-class) load-image* image. ;
: gopher-menu. ( object -- )
gopher-text [
[ nl ] [ <gopher-link> gopher-link. ] if-empty
] each ;
PRIVATE>
: gopher. ( url -- )
gopher swap {
{ A_TEXT [ gopher-text. ] }
{ A_MENU [ gopher-menu. ] }
{ A_INDEX [ gopher-menu. ] }
{ A_GIF [ gopher-gif. ] }
[ drop . ]
} case ;