File:  [gforth] / gforth / httpd.fs
Revision 1.23: download - view: text, annotated - select for diffs
Mon Dec 31 18:40:24 2007 UTC (11 years, 10 months ago) by anton
Branches: MAIN
CVS tags: HEAD
updated copyright notices for GPL v3

    1: #! /usr/local/bin/gforth
    2: 
    3: \ Copyright (C) 2000,2002,2003,2004,2006 Free Software Foundation, Inc.
    4: 
    5: \ This file is part of Gforth.
    6: 
    7: \ Gforth is free software; you can redistribute it and/or
    8: \ modify it under the terms of the GNU General Public License
    9: \ as published by the Free Software Foundation, either version 3
   10: \ of the License, or (at your option) any later version.
   11: 
   12: \ This program is distributed in the hope that it will be useful,
   13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
   14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   15: \ GNU General Public License for more details.
   16: 
   17: \ You should have received a copy of the GNU General Public License
   18: \ along with this program. If not, see http://www.gnu.org/licenses/.
   19: 
   20: \ This relies on inetd or xinetd:
   21: 
   22: \ To run the server on port 4444, do the following:
   23: 
   24: \ Add the following line to /etc/services:
   25: \ gforth          4444/tcp
   26: 
   27: \ If you use inetd, add the following line to /etc/inetd.conf:
   28: \ gforth stream tcp nowait.10000   wwwrun   /usr/users/bernd/bin/httpd
   29: 
   30: \ If you use xinetd, create the folliwing service in /etc/xinetd.d:
   31: \ service gforth
   32: \ {
   33: \         socket_type     = stream
   34: \         protocol        = tcp
   35: \         wait            = no
   36: \         user            = wwwrun
   37: \         server          = /home/bernd/bin/httpd
   38: \ }
   39: 
   40: \ If you want port 80, replace the service "gforth" with "http"
   41: 
   42: warnings off
   43: 
   44: require string.fs
   45: 
   46: Variable DocumentRoot  s" /srv/www/htdocs/" DocumentRoot $!
   47: Variable UserDir       s" public_html/"     UserDir      $!
   48: 
   49: Variable url
   50: Variable posted
   51: Variable url-args
   52: Variable protocol
   53: Variable data
   54: Variable active
   55: Variable command?
   56: 
   57: : get ( addr -- )  name rot $! ;
   58: : get-rest ( addr -- )  source >in @ /string dup >in +! rot $! ;
   59: 
   60: wordlist constant values
   61: wordlist constant commands
   62: 
   63: : value:  ( -- )  name
   64:   Forth definitions 2dup 1- nextname Variable
   65:   values set-current nextname here cell - Create ,
   66:   DOES> @ get-rest ;
   67: : >values  values 1 set-order command? off ;
   68: 
   69: \ HTTP protocol commands                               26mar00py
   70: 
   71: : rework-% ( add -- ) { url }  base @ >r hex
   72:     0 url $@len 0 ?DO
   73: 	url $@ drop I + c@ dup '% = IF
   74: 	    drop 0. url $@ I 1+ /string
   75: 	    2 min dup >r >number r> swap - >r 2drop
   76: 	ELSE  0 >r  THEN  over url $@ drop + c!  1+
   77:     r> 1+ +LOOP  url $!len
   78:     r> base ! ;
   79: 
   80: : rework-? ( addr -- )
   81:     dup >r $@ '? $split url-args $! nip r> $!len ;
   82: 
   83: : get-url ( -- ) url get protocol get-rest
   84:     url rework-? url rework-% >values ;
   85: 
   86: commands set-current
   87: 
   88: : GET   get-url data on  active off ;
   89: : POST  get-url data on  active on  ;
   90: : HEAD  get-url data off active off ;
   91: 
   92: \ HTTP protocol values                                 26mar00py
   93: 
   94: values set-current
   95: 
   96: value: User-Agent:
   97: value: Pragma:
   98: value: Host:
   99: value: Accept:
  100: value: Accept-Encoding:
  101: value: Accept-Language:
  102: value: Accept-Charset:
  103: value: Via:
  104: value: X-Forwarded-For:
  105: value: Cache-Control:
  106: value: Connection:
  107: value: Referer:
  108: value: Content-Type:
  109: value: Content-Length:
  110: value: Keep-Alive:
  111: 
  112: definitions
  113: 
  114: Variable maxnum
  115: 
  116: : ?cr ( -- )
  117:   #tib @ 1 >= IF  source 1- + c@ #cr = #tib +!  THEN ;
  118: : refill-loop ( -- flag ) base @ >r base off
  119:   BEGIN  refill ?cr  WHILE  ['] interpret catch drop  >in @ 0=  UNTIL
  120:   true  ELSE  maxnum off false  THEN  r> base ! ;
  121: : get-input ( -- flag ior )
  122:   s" /nosuchfile" url $!  s" HTTP/1.0" protocol $!
  123:   s" close" connection $!
  124:   infile-id push-file loadfile !  loadline off  blk off
  125:   commands 1 set-order  command? on  ['] refill-loop catch
  126:   Keep-Alive $@ snumber? dup 0> IF  nip  THEN  IF  maxnum !  THEN
  127:   active @ IF  s" " posted $! Content-Length $@ snumber? drop
  128:       posted $!len  posted $@ infile-id read-file throw drop
  129:   THEN  only forth also  pop-file ;
  130: 
  131: \ Rework HTML directory                                26mar00py
  132: 
  133: Variable htmldir
  134: 
  135: : rework-htmldir ( addr u -- addr' u' / ior )
  136:   htmldir $! htmldir $@ compact-filename htmldir $!len drop
  137:   htmldir $@ s" ../" string-prefix?
  138:   IF    -1 EXIT  THEN  \ can't access below current directory
  139:   htmldir $@ s" ~" string-prefix?
  140:   IF    UserDir $@ htmldir dup $@ 2dup '/ scan '/ skip
  141:         nip - nip $ins
  142:   ELSE  DocumentRoot $@ htmldir 0 $ins  THEN
  143:   htmldir $@ 1- 0 max + c@ '/ = htmldir $@len 0= or
  144:   IF  s" index.html" htmldir dup $@len $ins  THEN
  145:   htmldir $@ file-status nip ?dup ?EXIT
  146:   htmldir $@ ;
  147: 
  148: \ MIME type handling                                   26mar00py
  149: 
  150: : >mime ( addr u -- mime u' )  2dup tuck over + 1- ?DO
  151:   I c@ '. = ?LEAVE  1-  -1 +LOOP  /string ;
  152: 
  153: : >file ( addr u -- size fd )
  154:   r/o bin open-file throw >r
  155:   r@ file-size throw drop
  156:   ." Accept-Ranges: bytes" cr
  157:   ." Content-Length: " dup 0 .r cr r> ;
  158: : transparent ( size fd -- ) { fd }
  159:     $4000 allocate throw swap dup 0 ?DO
  160: 	2dup over swap $4000 min fd read-file throw type
  161: 	$4000 - $4000 +LOOP  drop
  162:     free fd close-file throw throw ;
  163: 
  164: \ Keep-Alive handling                                  26mar00py
  165: 
  166: : .connection ( -- )
  167:   ." Connection: "
  168:   connection $@ s" Keep-Alive" str= maxnum @ 0> and
  169:   IF  connection $@ type cr
  170:       ." Keep-Alive: timeout=15, max=" maxnum @ 0 .r cr
  171:       -1 maxnum +!  ELSE  ." close" cr maxnum off  THEN ;
  172: 
  173: : transparent: ( addr u -- ) Create  here over 1+ allot place
  174:   DOES>  >r  >file
  175:   .connection
  176:   ." Content-Type: "  r> count type cr cr
  177:   data @ IF  transparent  ELSE  nip close-file throw  THEN ;
  178: 
  179: \ mime types                                           26mar00py
  180: 
  181: : mime-read ( addr u -- )  r/o open-file throw
  182:     push-file loadfile !  0 loadline ! blk off
  183:     BEGIN  refill  WHILE
  184: 	char '# <> >in off name nip 0<> and  IF
  185: 	    >in off name
  186: 	    BEGIN  >in @ >r name nip  WHILE
  187: 		r> >in ! 2dup transparent:  REPEAT
  188: 	    2drop rdrop
  189: 	THEN
  190:     REPEAT  loadfile @ close-file pop-file throw ;
  191: 
  192: : lastrequest
  193:   ." Connection: close" cr maxnum off
  194:   ." Content-Type: text/html" cr cr ;
  195: 
  196: wordlist constant mime
  197: mime set-current
  198: 
  199: : shtml ( addr u -- )  lastrequest
  200:     data @ IF  included  ELSE  2drop  THEN ;
  201: 
  202: s" application/pgp-signature" transparent: sig
  203: s" application/x-bzip2" transparent: bz2
  204: s" application/x-gzip" transparent: gz
  205: s" /etc/mime.types" ' mime-read catch [IF]  2drop
  206:     \ no /etc/mime.types found on this machine,
  207:     \ generating the most important types:
  208:     s" text/html" transparent: html
  209:     s" image/gif" transparent: gif
  210:     s" image/png" transparent: png
  211:     s" image/jpg" transparent: jpg
  212: [THEN]
  213: 
  214: definitions
  215: 
  216: s" text/plain" transparent: txt
  217: 
  218: \ http errors                                          26mar00py
  219: 
  220: : .server ( -- )  ." Server: Gforth httpd/1.0 ("
  221:     s" os-class" environment? IF  type  THEN  ." )" cr ;
  222: : .ok  ( -- ) ." HTTP/1.1 200 OK" cr .server ;
  223: : html-error ( n addr u -- )
  224:     ." HTTP/1.1 " 2 pick . 2dup type cr .server
  225:     2 pick &405 = IF ." Allow: GET, HEAD, POST" cr  THEN
  226:     lastrequest
  227:     ." <HTML><HEAD><TITLE>" 2 pick . 2dup type
  228:     ." </TITLE></HEAD>" cr
  229:     ." <BODY><H1>" type drop ." </H1>" cr ;
  230: : .trailer ( -- )
  231:     ." <HR><ADDRESS>Gforth httpd 1.0</ADDRESS>" cr
  232:     ." </BODY></HTML>" cr ;
  233: : .nok ( -- ) command? @ IF  &405 s" Method Not Allowed"
  234:     ELSE  &400 s" Bad Request"  THEN  html-error
  235:     ." <P>Your browser sent a request that this server "
  236:     ." could not understand.</P>" cr
  237:     ." <P>Invalid request in: <CODE>"
  238:     error-stack cell+ 2@ swap type
  239:     ." </CODE></P>" cr .trailer ;
  240: : .nofile ( -- ) &404 s" Not Found" html-error
  241:     ." <P>The requested URL <CODE>" url $@ type
  242:     ." </CODE> was not found on this server</P>" cr .trailer ;
  243: 
  244: \ http server                                          26mar00py
  245: 
  246: Defer redirect?  ( addr u -- addr' u' t / f )
  247: Defer redirect ( addr u -- )
  248: :noname 2drop false ; IS redirect?
  249: 
  250: : http ( -- )  get-input  IF  .nok  ELSE
  251:     IF  url $@ 1 /string 2dup redirect? IF  redirect 2drop  ELSE
  252: 	rework-htmldir
  253: 	dup 0< IF  drop .nofile
  254: 	ELSE  .ok  2dup >mime mime search-wordlist
  255: 	    0= IF  ['] txt  THEN  catch IF  maxnum off THEN
  256: 	THEN  THEN  THEN  THEN  outfile-id flush-file throw ;
  257: 
  258: : httpd  ( n -- )  dup maxnum ! 0 <# #S #> Keep-Alive $!
  259:   maxnum @ 0 DO  ['] http catch  maxnum @ 0= or  ?LEAVE  LOOP ;
  260: 
  261: script? [IF]  :noname &100 httpd bye ; is bootmessage  [THEN]
  262: 
  263: \ Use Forth as server-side script language             26mar00py
  264: 
  265: : $> ( -- )
  266:     BEGIN  source >in @ /string s" <$" search  0= WHILE
  267:         type cr refill  0= UNTIL  EXIT  THEN
  268:     nip source >in @ /string rot - dup 2 + >in +! type ;
  269: : <HTML> ( -- )  ." <HTML>" $> ;
  270: 
  271: \ provide transparent proxying
  272: 
  273: include ./proxy.fs

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