357 lines
9.2 KiB
Factor
357 lines
9.2 KiB
Factor
! Copyright (C) 2008 Doug Coleman.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors assocs byte-arrays calendar classes combinators
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combinators.short-circuit concurrency.promises continuations
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destructors ftp io io.backend io.directories io.encodings
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io.encodings.binary tools.files io.encodings.utf8 io.files
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io.files.info io.pathnames io.servers.connection io.sockets
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io.streams.duplex io.streams.string io.timeouts kernel make math
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math.bitwise math.parser namespaces sequences splitting threads
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unicode.case logging calendar.format strings io.files.links
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io.files.types io.encodings.8-bit.latin1 simple-tokenizer ;
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IN: ftp.server
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SYMBOL: server
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SYMBOL: client
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TUPLE: ftp-server < threaded-server { serving-directory string } ;
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TUPLE: ftp-client user password extra-connection ;
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TUPLE: ftp-command raw tokenized ;
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: <ftp-command> ( str -- obj )
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dup \ <ftp-command> DEBUG log-message
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ftp-command new
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over >>raw
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swap tokenize >>tokenized ;
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TUPLE: ftp-get path ;
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: <ftp-get> ( path -- obj )
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ftp-get new
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swap >>path ;
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TUPLE: ftp-put path ;
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: <ftp-put> ( path -- obj )
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ftp-put new
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swap >>path ;
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TUPLE: ftp-list ;
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C: <ftp-list> ftp-list
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TUPLE: ftp-disconnect ;
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C: <ftp-disconnect> ftp-disconnect
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: (send-response) ( n string separator -- )
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[ number>string write ] 2dip write ftp-send ;
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: send-response ( ftp-response -- )
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[ n>> ] [ strings>> ] bi
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[ but-last-slice [ "-" (send-response) ] with each ]
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[ first " " (send-response) ] 2bi ;
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: server-response ( string n -- )
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2dup number>string swap ":" glue \ server-response DEBUG log-message
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<ftp-response>
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swap >>n
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swap add-response-line
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send-response ;
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: serving? ( path -- ? )
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resolve-symlinks server get serving-directory>> head? ;
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: can-serve-directory? ( path -- ? )
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{ [ exists? ] [ file-info directory? ] [ serving? ] } 1&& ;
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: can-serve-file? ( path -- ? )
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{
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[ exists? ]
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[ file-info type>> +regular-file+ = ]
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[ serving? ]
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} 1&& ;
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: ftp-error ( string -- ) 500 server-response ;
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: ftp-unimplemented ( string -- ) 502 server-response ;
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: send-banner ( -- )
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"Welcome to " host-name append 220 server-response ;
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: anonymous-only ( -- )
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"This FTP server is anonymous only." 530 server-response ;
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: handle-QUIT ( obj -- )
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drop "Goodbye." 221 server-response ;
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: handle-USER ( ftp-command -- )
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[
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tokenized>> second client get user<<
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"Please specify the password." 331 server-response
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] [
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2drop "bad USER" ftp-error
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] recover ;
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: handle-PASS ( ftp-command -- )
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[
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tokenized>> second client get password<<
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"Login successful" 230 server-response
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] [
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2drop "PASS error" ftp-error
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] recover ;
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ERROR: type-error type ;
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: parse-type ( string -- string' )
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>upper {
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{ "IMAGE" [ "Binary" ] }
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{ "I" [ "Binary" ] }
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[ type-error ]
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} case ;
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: handle-TYPE ( obj -- )
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[
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tokenized>> second parse-type
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"Switching to " " mode" surround 200 server-response
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] [
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2drop "TYPE is binary only" ftp-error
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] recover ;
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: random-local-server ( -- server )
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remote-address get class new 0 >>port binary <server> ;
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: port>bytes ( port -- hi lo )
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[ -8 shift ] keep [ 8 bits ] bi@ ;
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: handle-PWD ( obj -- )
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drop
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current-directory get "\"" dup surround 257 server-response ;
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: handle-SYST ( obj -- )
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drop
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"UNIX Type: L8" 215 server-response ;
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: start-directory ( -- )
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"Here comes the directory listing." 150 server-response ;
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: transfer-outgoing-file ( path -- )
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[ "Opening BINARY mode data connection for " ] dip
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[ file-name ] [
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file-info size>> number>string
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"(" " bytes)." surround
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] bi " " glue append 150 server-response ;
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: transfer-incoming-file ( path -- )
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"Opening BINARY mode data connection for " prepend
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150 server-response ;
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: finish-file-transfer ( -- )
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"File send OK." 226 server-response ;
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GENERIC: handle-passive-command ( stream obj -- )
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: passive-loop ( server -- )
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[
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[
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|dispose
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30 seconds over set-timeout
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accept drop &dispose
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client get extra-connection>>
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30 seconds ?promise-timeout
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handle-passive-command
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]
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[ client get f >>extra-connection drop ]
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[ drop ] cleanup
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] with-destructors ;
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: finish-directory ( -- )
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"Directory send OK." 226 server-response ;
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M: ftp-list handle-passive-command ( stream obj -- )
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drop
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start-directory [
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utf8 encode-output
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[ current-directory get directory. ] with-string-writer string-lines
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harvest [ ftp-send ] each
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] with-output-stream finish-directory ;
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M: ftp-get handle-passive-command ( stream obj -- )
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[
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path>>
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[ transfer-outgoing-file ]
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[ binary <file-reader> swap stream-copy ] bi
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finish-file-transfer
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] [
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3drop "File transfer failed" ftp-error
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] recover ;
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M: ftp-put handle-passive-command ( stream obj -- )
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[
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path>>
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[ transfer-incoming-file ]
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[ binary <file-writer> stream-copy ] bi
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finish-file-transfer
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] [
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3drop "File transfer failed" ftp-error
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] recover ;
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M: ftp-disconnect handle-passive-command ( stream obj -- )
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drop dispose ;
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: fulfill-client ( obj -- )
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client get extra-connection>> [
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fulfill
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] [
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drop
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"Establish an active or passive connection first" ftp-error
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] if* ;
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: handle-STOR ( obj -- )
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tokenized>> second
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dup can-serve-file? [
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<ftp-put> fulfill-client
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] [
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drop
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<ftp-disconnect> fulfill-client
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] if ;
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: handle-LIST ( obj -- )
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drop current-directory get
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can-serve-directory? [
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<ftp-list> fulfill-client
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] [
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<ftp-disconnect> fulfill-client
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] if ;
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: not-a-plain-file ( path -- )
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": not a plain file." append ftp-error ;
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: handle-RETR ( obj -- )
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tokenized>> second
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dup can-serve-file? [
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<ftp-get> fulfill-client
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] [
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not-a-plain-file
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<ftp-disconnect> fulfill-client
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] if ;
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: handle-SIZE ( obj -- )
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tokenized>> second
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dup can-serve-file? [
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file-info size>> number>string 213 server-response
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] [
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not-a-plain-file
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] if ;
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: expect-connection ( -- port )
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<promise> client get extra-connection<<
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random-local-server
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[ [ passive-loop ] curry in-thread ]
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[ addr>> port>> ] bi ;
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: handle-PASV ( obj -- )
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drop
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expect-connection port>bytes [ number>string ] bi@ "," glue
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"Entering Passive Mode (127,0,0,1," ")" surround
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221 server-response ;
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: handle-EPSV ( obj -- )
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drop
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client get f >>extra-connection drop
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expect-connection number>string
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"Entering Extended Passive Mode (|||" "|)" surround
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229 server-response ;
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: handle-MDTM ( obj -- )
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tokenized>> 1 swap ?nth [
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dup file-info dup directory? [
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drop not-a-plain-file
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] [
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nip
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modified>> timestamp>mdtm
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213 server-response
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] if
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] [
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"" not-a-plain-file
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] if* ;
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ERROR: not-a-directory ;
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ERROR: no-directory-permissions ;
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: directory-change-success ( -- )
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"Directory successully changed." 250 server-response ;
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: directory-change-failed ( -- )
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"Failed to change directory." 553 server-response ;
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: handle-CWD ( obj -- )
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tokenized>> 1 swap ?nth [
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dup can-serve-directory? [
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set-current-directory
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directory-change-success
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] [
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drop
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directory-change-failed
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] if
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] [
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directory-change-success
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] if* ;
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: unrecognized-command ( obj -- )
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raw>> "Unrecognized command: " prepend ftp-error ;
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: client-loop-dispatch ( str/f -- ? )
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dup tokenized>> first >upper {
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{ "QUIT" [ handle-QUIT f ] }
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{ "USER" [ handle-USER t ] }
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{ "PASS" [ handle-PASS t ] }
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{ "SYST" [ handle-SYST t ] }
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{ "ACCT" [ drop "ACCT unimplemented" ftp-unimplemented t ] }
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{ "PWD" [ handle-PWD t ] }
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{ "TYPE" [ handle-TYPE t ] }
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{ "CWD" [ handle-CWD t ] }
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{ "PASV" [ handle-PASV t ] }
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{ "EPSV" [ handle-EPSV t ] }
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{ "LIST" [ handle-LIST t ] }
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{ "STOR" [ handle-STOR t ] }
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{ "RETR" [ handle-RETR t ] }
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{ "SIZE" [ handle-SIZE t ] }
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{ "MDTM" [ handle-MDTM t ] }
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[ drop unrecognized-command t ]
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} case ;
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: read-command ( -- ftp-command/f )
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readln [ f ] [ <ftp-command> ] if-empty ;
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: handle-client-loop ( -- )
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read-command [
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client-loop-dispatch
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[ handle-client-loop ] when
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] when* ;
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: serve-directory ( server -- )
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serving-directory>> [
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send-banner
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handle-client-loop
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] with-directory ;
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M: ftp-server handle-client* ( server -- )
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[
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"New client" \ handle-client* DEBUG log-message
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ftp-client new client set
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[ server set ] [ serve-directory ] bi
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] with-destructors ;
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: <ftp-server> ( directory port -- server )
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latin1 ftp-server new-threaded-server
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swap >>insecure
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swap resolve-symlinks >>serving-directory
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"ftp.server" >>name
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5 minutes >>timeout ;
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: ftpd ( directory port -- )
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<ftp-server> start-server ;
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: ftpd-main ( path -- ) 2100 ftpd ;
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MAIN: ftpd-main
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! sudo tcpdump -i en1 -A -s 10000 tcp port 21
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