New http request/response parsers using pegs
Slava Pestov
parent
c19d83e13f
commit
9674541ceb
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@ -1,7 +1,8 @@
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USING: http tools.test multiline tuple-syntax
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io.streams.string io.encodings.utf8 io.encodings.string
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kernel arrays splitting sequences
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assocs io.sockets db db.sqlite continuations urls hashtables ;
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assocs io.sockets db db.sqlite continuations urls hashtables
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accessors ;
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IN: http.tests
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: lf>crlf "\n" split "\r\n" join ;
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@ -73,10 +74,21 @@ GET nested HTTP/1.0
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;
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[ read-request-test-3 [ read-request ] with-string-reader ]
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[ read-request-test-3 lf>crlf [ read-request ] with-string-reader ]
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[ "Bad request: URL" = ]
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must-fail-with
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STRING: read-request-test-4
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GET /blah HTTP/1.0
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Host: "www.amazon.com"
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;
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[ "www.amazon.com" ]
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[
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read-request-test-4 lf>crlf [ read-request ] with-string-reader
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"host" header
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] unit-test
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STRING: read-response-test-1
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HTTP/1.1 404 not found
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Content-Type: text/html; charset=UTF-8
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@ -117,7 +129,38 @@ read-response-test-1' 1array [
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[ t ] [
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"rmid=732423sdfs73242; path=/; domain=.example.net; expires=Fri, 31-Dec-2010 23:59:59 GMT"
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dup parse-cookies unparse-cookies =
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dup parse-set-cookie first unparse-set-cookie =
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] unit-test
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[ t ] [
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"a="
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dup parse-set-cookie first unparse-set-cookie =
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] unit-test
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STRING: read-response-test-2
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HTTP/1.1 200 Content follows
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Set-Cookie: oo="bar; a=b"; httponly=yes; sid=123456
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;
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[ 2 ] [
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read-response-test-2 lf>crlf
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[ read-response ] with-string-reader
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cookies>> length
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] unit-test
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STRING: read-response-test-3
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HTTP/1.1 200 Content follows
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Set-Cookie: oo="bar; a=b"; comment="your mom"; httponly=yes
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;
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[ 1 ] [
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read-response-test-3 lf>crlf
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[ read-response ] with-string-reader
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cookies>> length
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] unit-test
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! Live-fire exercise
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@ -1,8 +1,7 @@
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! Copyright (C) 2003, 2008 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors kernel combinators math namespaces
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assocs sequences splitting sorting sets debugger
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assocs assocs.lib sequences splitting sorting sets debugger
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strings vectors hashtables quotations arrays byte-arrays
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math.parser calendar calendar.format present
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@ -11,7 +10,9 @@ io.encodings.8-bit
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unicode.case unicode.categories qualified
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urls html.templates xml xml.data xml.writer ;
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urls html.templates xml xml.data xml.writer
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http.parsers ;
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EXCLUDE: fry => , ;
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@ -19,40 +20,20 @@ IN: http
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: crlf ( -- ) "\r\n" write ;
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: add-header ( value key assoc -- )
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[ at dup [ "; " rot 3append ] [ drop ] if ] 2keep set-at ;
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: header-line ( line -- )
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dup first blank? [
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[ blank? ] left-trim
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"last-header" get
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"header" get
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add-header
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] [
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":" split1 dup [
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[ blank? ] left-trim
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swap >lower dup "last-header" set
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"header" get add-header
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] [
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2drop
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] if
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] if ;
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: read-lf ( -- bytes )
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"\n" read-until CHAR: \n assert= ;
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: read-crlf ( -- bytes )
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"\r" read-until
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[ CHAR: \r assert= read1 CHAR: \n assert= ] when* ;
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: (read-header) ( -- )
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read-crlf dup
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empty? [ drop ] [ header-line (read-header) ] if ;
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: (read-header) ( -- alist )
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[ read-crlf dup f like ] [ parse-header-line ] [ drop ] unfold ;
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: process-header ( alist -- assoc )
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f swap [ [ swap or dup ] dip swap ] assoc-map nip
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[ ?push ] histogram [ "; " join ] assoc-map
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>hashtable ;
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: read-header ( -- assoc )
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H{ } clone [
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"header" [ (read-header) ] with-variable
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] keep ;
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(read-header) process-header ;
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: header-value>string ( value -- string )
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{
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@ -63,47 +44,62 @@ IN: http
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: check-header-string ( str -- str )
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#! http://en.wikipedia.org/wiki/HTTP_Header_Injection
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dup "\r\n" intersect empty?
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dup "\r\n\"" intersect empty?
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[ "Header injection attack" throw ] unless ;
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: write-header ( assoc -- )
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>alist sort-keys [
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swap
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check-header-string write ": " write
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header-value>string check-header-string write crlf
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[ check-header-string write ": " write ]
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[ header-value>string check-header-string write crlf ] bi*
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] assoc-each crlf ;
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TUPLE: cookie name value path domain expires max-age http-only ;
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TUPLE: cookie name value version comment path domain expires max-age http-only secure ;
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: <cookie> ( value name -- cookie )
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cookie new
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swap >>name
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swap >>value ;
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: parse-cookies ( string -- seq )
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: parse-set-cookie ( string -- seq )
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[
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f swap
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";" split [
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[ blank? ] trim "=" split1 swap >lower {
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(parse-set-cookie)
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[
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swap {
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{ "version" [ >>version ] }
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{ "comment" [ >>comment ] }
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{ "expires" [ cookie-string>timestamp >>expires ] }
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{ "max-age" [ string>number seconds >>max-age ] }
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{ "domain" [ >>domain ] }
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{ "path" [ >>path ] }
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{ "httponly" [ drop t >>http-only ] }
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{ "" [ drop ] }
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{ "secure" [ drop t >>secure ] }
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[ <cookie> dup , nip ]
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} case
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] each
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] assoc-each
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drop
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] { } make ;
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: parse-cookie ( string -- seq )
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[
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f swap
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(parse-cookie)
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[
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swap {
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{ "$version" [ >>version ] }
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{ "$domain" [ >>domain ] }
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{ "$path" [ >>path ] }
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[ <cookie> dup , nip ]
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} case
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] assoc-each
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drop
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] { } make ;
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: check-cookie-string ( string -- string' )
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dup "=;'\"" intersect empty?
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dup "=;'\"\r\n" intersect empty?
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[ "Bad cookie name or value" throw ] unless ;
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: (unparse-cookie) ( key value -- )
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: unparse-cookie-value ( key value -- )
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{
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{ f [ drop ] }
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{ t [ check-cookie-string , ] }
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@ -118,20 +114,30 @@ TUPLE: cookie name value path domain expires max-age http-only ;
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]
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} case ;
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: unparse-cookie ( cookie -- strings )
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: (unparse-cookie) ( cookie -- strings )
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[
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dup name>> check-cookie-string >lower
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over value>> (unparse-cookie)
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"path" over path>> (unparse-cookie)
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"domain" over domain>> (unparse-cookie)
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"expires" over expires>> (unparse-cookie)
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"max-age" over max-age>> (unparse-cookie)
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"httponly" over http-only>> (unparse-cookie)
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over value>> unparse-cookie-value
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"$path" over path>> unparse-cookie-value
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"$domain" over domain>> unparse-cookie-value
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drop
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] { } make ;
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: unparse-cookies ( cookies -- string )
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[ unparse-cookie ] map concat "; " join ;
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: unparse-cookie ( cookies -- string )
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[ (unparse-cookie) ] map concat "; " join ;
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: unparse-set-cookie ( cookie -- string )
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[
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dup name>> check-cookie-string >lower
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over value>> unparse-cookie-value
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"path" over path>> unparse-cookie-value
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"domain" over domain>> unparse-cookie-value
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"expires" over expires>> unparse-cookie-value
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"max-age" over max-age>> unparse-cookie-value
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"httponly" over http-only>> unparse-cookie-value
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"secure" over secure>> unparse-cookie-value
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drop
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] { } make "; " join ;
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TUPLE: request
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method
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@ -141,6 +147,13 @@ header
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post-data
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cookies ;
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: check-url ( string -- url )
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>url dup path>> "/" head? [ "Bad request: URL" throw ] unless ; inline
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: read-request-line ( request -- request )
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read-crlf parse-request-line first3
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[ >>method ] [ check-url >>url ] [ >>version ] tri* ;
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: set-header ( request/response value key -- request/response )
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pick header>> set-at ;
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@ -155,27 +168,9 @@ cookies ;
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"close" "connection" set-header
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"Factor http.client" "user-agent" set-header ;
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: read-method ( request -- request )
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" " read-until [ "Bad request: method" throw ] unless
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>>method ;
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: check-absolute ( url -- url )
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dup path>> "/" head? [ "Bad request: URL" throw ] unless ; inline
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: read-url ( request -- request )
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" " read-until [
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dup empty? [ drop read-url ] [ >url check-absolute >>url ] if
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] [ "Bad request: URL" throw ] if ;
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: parse-version ( string -- version )
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"HTTP/" ?head [ "Bad request: version" throw ] unless
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dup { "1.0" "1.1" } member? [ "Bad request: version" throw ] unless ;
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: read-request-version ( request -- request )
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read-crlf [ CHAR: \s = ] left-trim
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parse-version
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>>version ;
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: read-request-header ( request -- request )
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read-header >>header ;
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@ -210,7 +205,7 @@ TUPLE: post-data raw content content-type ;
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drop ;
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: extract-cookies ( request -- request )
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dup "cookie" header [ parse-cookies >>cookies ] when* ;
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dup "cookie" header [ parse-cookie >>cookies ] when* ;
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: parse-content-type-attributes ( string -- attributes )
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" " split harvest [ "=" split1 [ >lower ] dip ] { } map>assoc ;
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@ -220,22 +215,18 @@ TUPLE: post-data raw content content-type ;
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: read-request ( -- request )
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<request>
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read-method
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read-url
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read-request-version
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read-request-line
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read-request-header
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read-post-data
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extract-host
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extract-cookies ;
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: write-method ( request -- request )
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dup method>> write bl ;
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: write-request-url ( request -- request )
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dup url>> relative-url present write bl ;
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: write-version ( request -- request )
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"HTTP/" write dup request-version write crlf ;
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: write-request-line ( request -- request )
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dup
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[ method>> write bl ]
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[ url>> relative-url present write bl ]
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[ "HTTP/" write version>> write crlf ]
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tri ;
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: url-host ( url -- string )
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[ host>> ] [ port>> ] bi dup "http" protocol-port =
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@ -249,7 +240,7 @@ TUPLE: post-data raw content content-type ;
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[ content-type>> "content-type" pick set-at ]
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bi
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] when*
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over cookies>> f like [ unparse-cookies "cookie" pick set-at ] when*
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over cookies>> f like [ unparse-cookie "cookie" pick set-at ] when*
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write-header ;
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GENERIC: >post-data ( object -- post-data )
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@ -274,9 +265,7 @@ M: f >post-data ;
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: write-request ( request -- )
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unparse-post-data
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write-method
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write-request-url
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write-version
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write-request-line
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write-request-header
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write-post-data
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flush
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@ -311,23 +300,13 @@ M: response clone
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[ clone ] change-header
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[ clone ] change-cookies ;
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: read-response-version ( response -- response )
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" \t" read-until
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[ "Bad response: version" throw ] unless
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parse-version
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>>version ;
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: read-response-code ( response -- response )
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" \t" read-until [ "Bad response: code" throw ] unless
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string>number [ "Bad response: code" throw ] unless*
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>>code ;
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: read-response-message ( response -- response )
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read-crlf >>message ;
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: read-response-line ( response -- response )
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read-crlf parse-response-line first3
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[ >>version ] [ >>code ] [ >>message ] tri* ;
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: read-response-header ( response -- response )
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read-header >>header
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dup "set-cookie" header parse-cookies >>cookies
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dup "set-cookie" header parse-set-cookie >>cookies
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dup "content-type" header [
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parse-content-type
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[ >>content-type ]
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@ -336,20 +315,15 @@ M: response clone
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: read-response ( -- response )
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<response>
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read-response-version
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read-response-code
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read-response-message
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read-response-line
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read-response-header ;
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: write-response-version ( response -- response )
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"HTTP/" write
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dup version>> write bl ;
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: write-response-code ( response -- response )
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dup code>> number>string write bl ;
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: write-response-message ( response -- response )
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dup message>> write crlf ;
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: write-response-line ( response -- response )
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dup
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[ "HTTP/" write version>> write bl ]
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[ code>> present write bl ]
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[ message>> write crlf ]
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tri ;
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: unparse-content-type ( request -- content-type )
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[ content-type>> "application/octet-stream" or ]
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@ -357,19 +331,29 @@ M: response clone
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bi
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[ "; charset=" swap 3append ] when* ;
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: ensure-domain ( cookie -- cookie )
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[
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request get url>>
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host>> dup "localhost" =
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[ drop ] [ or ] if
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] change-domain ;
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: write-response-header ( response -- response )
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dup header>> clone
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over cookies>> f like [ unparse-cookies "set-cookie" pick set-at ] when*
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#! We send one set-cookie header per cookie, because that's
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#! what Firefox expects.
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dup header>> >alist >vector
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over unparse-content-type "content-type" pick set-at
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over cookies>> [
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ensure-domain unparse-set-cookie
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"set-cookie" swap 2array over push
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] each
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write-header ;
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: write-response-body ( response -- response )
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dup body>> call-template ;
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M: response write-response ( respose -- )
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write-response-version
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write-response-code
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write-response-message
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write-response-line
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write-response-header
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flush
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drop ;
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@ -403,9 +387,7 @@ body ;
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"1.1" >>version ;
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M: raw-response write-response ( respose -- )
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write-response-version
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write-response-code
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write-response-message
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write-response-line
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write-response-body
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drop ;
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|
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@ -0,0 +1,166 @@
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USING: math math.order math.parser kernel combinators.lib
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sequences sequences.deep peg peg.parsers assocs arrays
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hashtables strings unicode.case namespaces ascii ;
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IN: http.parsers
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|
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: except ( quot -- parser )
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[ not ] compose satisfy ; inline
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: except-these ( quots -- parser )
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[ 1|| ] curry except ; inline
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: ctl? ( ch -- ? )
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{ [ 0 31 between? ] [ 127 = ] } 1|| ;
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: tspecial? ( ch -- ? )
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"()<>@,;:\\\"/[]?={} \t" member? ;
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: 'token' ( -- parser )
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{ [ ctl? ] [ tspecial? ] } except-these repeat1 ;
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: case-insensitive ( parser -- parser' )
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[ flatten >string >lower ] action ;
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: case-sensitive ( parser -- parser' )
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[ flatten >string ] action ;
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: 'space' ( -- parser )
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[ " \t" member? ] satisfy repeat0 hide ;
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: one-of ( strings -- parser )
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[ token ] map choice ;
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: 'http-method' ( -- parser )
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{ "OPTIONS" "GET" "HEAD" "POST" "PUT" "DELETE" "TRACE" "CONNECT" } one-of ;
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||||
|
||||
: 'url' ( -- parser )
|
||||
[ " \t\r\n" member? ] except repeat1 case-sensitive ;
|
||||
|
||||
: 'http-version' ( -- parser )
|
||||
[
|
||||
"HTTP" token hide ,
|
||||
'space' ,
|
||||
"/" token hide ,
|
||||
'space' ,
|
||||
"1" token ,
|
||||
"." token ,
|
||||
{ "0" "1" } one-of ,
|
||||
] seq* [ concat >string ] action ;
|
||||
|
||||
PEG: parse-request-line ( string -- triple )
|
||||
#! Triple is { method url version }
|
||||
[
|
||||
'space' ,
|
||||
'http-method' ,
|
||||
'space' ,
|
||||
'url' ,
|
||||
'space' ,
|
||||
'http-version' ,
|
||||
'space' ,
|
||||
] seq* just ;
|
||||
|
||||
: 'text' ( -- parser )
|
||||
[ ctl? ] except ;
|
||||
|
||||
: 'response-code' ( -- parser )
|
||||
[ digit? ] satisfy 3 exactly-n [ string>number ] action ;
|
||||
|
||||
: 'response-message' ( -- parser )
|
||||
'text' repeat0 case-sensitive ;
|
||||
|
||||
PEG: parse-response-line ( string -- triple )
|
||||
#! Triple is { version code message }
|
||||
[
|
||||
'space' ,
|
||||
'http-version' ,
|
||||
'space' ,
|
||||
'response-code' ,
|
||||
'space' ,
|
||||
'response-message' ,
|
||||
] seq* just ;
|
||||
|
||||
: 'crlf' ( -- parser )
|
||||
"\r\n" token ;
|
||||
|
||||
: 'lws' ( -- parser )
|
||||
[ " \t" member? ] satisfy repeat1 ;
|
||||
|
||||
: 'qdtext' ( -- parser )
|
||||
{ [ CHAR: " = ] [ ctl? ] } except-these ;
|
||||
|
||||
: 'quoted-char' ( -- parser )
|
||||
"\\" token hide any-char 2seq ;
|
||||
|
||||
: 'quoted-string' ( -- parser )
|
||||
'quoted-char' 'qdtext' 2choice repeat0 "\"" "\"" surrounded-by ;
|
||||
|
||||
: 'ctext' ( -- parser )
|
||||
{ [ ctl? ] [ "()" member? ] } except-these ;
|
||||
|
||||
: 'comment' ( -- parser )
|
||||
'ctext' 'comment' 2choice repeat0 "(" ")" surrounded-by ;
|
||||
|
||||
: 'field-name' ( -- parser )
|
||||
'token' case-insensitive ;
|
||||
|
||||
: 'field-content' ( -- parser )
|
||||
'quoted-string' case-sensitive
|
||||
'text' repeat0 case-sensitive
|
||||
2choice ;
|
||||
|
||||
PEG: parse-header-line ( string -- pair )
|
||||
#! Pair is either { name value } or { f value }. If f, its a
|
||||
#! continuation of the previous header line.
|
||||
[
|
||||
'field-name' ,
|
||||
'space' ,
|
||||
":" token hide ,
|
||||
'space' ,
|
||||
'field-content' ,
|
||||
] seq*
|
||||
[
|
||||
'lws' [ drop f ] action ,
|
||||
'field-content' ,
|
||||
] seq*
|
||||
2choice ;
|
||||
|
||||
: 'word' ( -- parser )
|
||||
'token' 'quoted-string' 2choice ;
|
||||
|
||||
: 'value' ( -- parser )
|
||||
'quoted-string'
|
||||
[ ";" member? ] except repeat0
|
||||
2choice case-sensitive ;
|
||||
|
||||
: 'attr' ( -- parser )
|
||||
'token' case-insensitive ;
|
||||
|
||||
: 'av-pair' ( -- parser )
|
||||
[
|
||||
'space' ,
|
||||
'attr' ,
|
||||
'space' ,
|
||||
[ "=" token , 'space' , 'value' , ] seq* [ peek ] action
|
||||
epsilon [ drop f ] action
|
||||
2choice ,
|
||||
'space' ,
|
||||
] seq* ;
|
||||
|
||||
: 'av-pairs' ( -- parser )
|
||||
'av-pair' ";" token list-of optional ;
|
||||
|
||||
PEG: (parse-set-cookie) ( string -- alist ) 'av-pairs' just ;
|
||||
|
||||
: 'cookie-value' ( -- parser )
|
||||
[
|
||||
'space' ,
|
||||
'attr' ,
|
||||
'space' ,
|
||||
"=" token hide ,
|
||||
'space' ,
|
||||
'value' ,
|
||||
'space' ,
|
||||
] seq* ;
|
||||
|
||||
PEG: (parse-cookie) ( string -- alist )
|
||||
'cookie-value' [ ";," member? ] satisfy list-of optional just ;
|
||||
Loading…
Reference in New Issue