File:  [gforth] / gforth / httpd.fs
Revision 1.21: download - view: text, annotated - select for diffs
Sat Oct 7 21:51:28 2006 UTC (13 years, 1 month ago) by pazsan
Branches: MAIN
CVS tags: HEAD
Bugfixing and some comments about how to get it to work

    1: #! /usr/local/bin/gforth
    2: 
    3: \ Copyright (C) 2000,2002,2003,2004 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 2
   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, write to the Free Software
   19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
   20: 
   21: \ This relies on inetd or xinetd:
   22: 
   23: \ To run the server on port 4444, do the following:
   24: 
   25: \ Add the following line to /etc/services:
   26: \ gforth          4444/tcp
   27: 
   28: \ If you use inetd, add the following line to /etc/inetd.conf:
   29: \ gforth stream tcp nowait.10000   wwwrun   /usr/users/bernd/bin/httpd
   30: 
   31: \ If you use xinetd, create the folliwing service in /etc/xinetd.d:
   32: \ service gforth
   33: \ {
   34: \         socket_type     = stream
   35: \         protocol        = tcp
   36: \         wait            = no
   37: \         user            = wwwrun
   38: \         server          = /home/bernd/bin/httpd
   39: \ }
   40: 
   41: \ If you want port 80, replace the service "gforth" with "http"
   42: 
   43: warnings off
   44: 
   45: require string.fs
   46: 
   47: Variable DocumentRoot  s" /srv/www/htdocs/" DocumentRoot $!
   48: Variable UserDir       s" public_html/"     UserDir      $!
   49: 
   50: Variable url
   51: Variable posted
   52: Variable url-args
   53: Variable protocol
   54: Variable data
   55: Variable active
   56: Variable command?
   57: 
   58: : get ( addr -- )  name rot $! ;
   59: : get-rest ( addr -- )  source >in @ /string dup >in +! rot $! ;
   60: 
   61: wordlist constant values
   62: wordlist constant commands
   63: 
   64: : value:  ( -- )  name
   65:   Forth definitions 2dup 1- nextname Variable
   66:   values set-current nextname here cell - Create ,
   67:   DOES> @ get-rest ;
   68: : >values  values 1 set-order command? off ;
   69: 
   70: \ HTTP protocol commands                               26mar00py
   71: 
   72: : rework-% ( add -- ) { url }  base @ >r hex
   73:     0 url $@len 0 ?DO
   74: 	url $@ drop I + c@ dup '% = IF
   75: 	    drop 0. url $@ I 1+ /string
   76: 	    2 min dup >r >number r> swap - >r 2drop
   77: 	ELSE  0 >r  THEN  over url $@ drop + c!  1+
   78:     r> 1+ +LOOP  url $!len
   79:     r> base ! ;
   80: 
   81: : rework-? ( addr -- )
   82:     dup >r $@ '? $split url-args $! nip r> $!len ;
   83: 
   84: : get-url ( -- ) url get protocol get-rest
   85:     url rework-? url rework-% >values ;
   86: 
   87: commands set-current
   88: 
   89: : GET   get-url data on  active off ;
   90: : POST  get-url data on  active on  ;
   91: : HEAD  get-url data off active off ;
   92: 
   93: \ HTTP protocol values                                 26mar00py
   94: 
   95: values set-current
   96: 
   97: value: User-Agent:
   98: value: Pragma:
   99: value: Host:
  100: value: Accept:
  101: value: Accept-Encoding:
  102: value: Accept-Language:
  103: value: Accept-Charset:
  104: value: Via:
  105: value: X-Forwarded-For:
  106: value: Cache-Control:
  107: value: Connection:
  108: value: Referer:
  109: value: Content-Type:
  110: value: Content-Length:
  111: value: Keep-Alive:
  112: 
  113: definitions
  114: 
  115: Variable maxnum
  116: 
  117: : ?cr ( -- )
  118:   #tib @ 1 >= IF  source 1- + c@ #cr = #tib +!  THEN ;
  119: : refill-loop ( -- flag ) base @ >r base off
  120:   BEGIN  refill ?cr  WHILE  ['] interpret catch drop  >in @ 0=  UNTIL
  121:   true  ELSE  maxnum off false  THEN  r> base ! ;
  122: : get-input ( -- flag ior )
  123:   s" /nosuchfile" url $!  s" HTTP/1.0" protocol $!
  124:   s" close" connection $!
  125:   infile-id push-file loadfile !  loadline off  blk off
  126:   commands 1 set-order  command? on  ['] refill-loop catch
  127:   Keep-Alive $@ snumber? dup 0> IF  nip  THEN  IF  maxnum !  THEN
  128:   active @ IF  s" " posted $! Content-Length $@ snumber? drop
  129:       posted $!len  posted $@ infile-id read-file throw drop
  130:   THEN  only forth also  pop-file ;
  131: 
  132: \ Rework HTML directory                                26mar00py
  133: 
  134: Variable htmldir
  135: 
  136: : rework-htmldir ( addr u -- addr' u' / ior )
  137:   htmldir $! htmldir $@ compact-filename htmldir $!len drop
  138:   htmldir $@ s" ../" string-prefix?
  139:   IF    -1 EXIT  THEN  \ can't access below current directory
  140:   htmldir $@ s" ~" string-prefix?
  141:   IF    UserDir $@ htmldir dup $@ 2dup '/ scan '/ skip
  142:         nip - nip $ins
  143:   ELSE  DocumentRoot $@ htmldir 0 $ins  THEN
  144:   htmldir $@ 1- 0 max + c@ '/ = htmldir $@len 0= or
  145:   IF  s" index.html" htmldir dup $@len $ins  THEN
  146:   htmldir $@ file-status nip ?dup ?EXIT
  147:   htmldir $@ ;
  148: 
  149: \ MIME type handling                                   26mar00py
  150: 
  151: : >mime ( addr u -- mime u' )  2dup tuck over + 1- ?DO
  152:   I c@ '. = ?LEAVE  1-  -1 +LOOP  /string ;
  153: 
  154: : >file ( addr u -- size fd )
  155:   r/o bin open-file throw >r
  156:   r@ file-size throw drop
  157:   ." Accept-Ranges: bytes" cr
  158:   ." Content-Length: " dup 0 .r cr r> ;
  159: : transparent ( size fd -- ) { fd }
  160:     $4000 allocate throw swap dup 0 ?DO
  161: 	2dup over swap $4000 min fd read-file throw type
  162: 	$4000 - $4000 +LOOP  drop
  163:     free fd close-file throw throw ;
  164: 
  165: \ Keep-Alive handling                                  26mar00py
  166: 
  167: : .connection ( -- )
  168:   ." Connection: "
  169:   connection $@ s" Keep-Alive" str= maxnum @ 0> and
  170:   IF  connection $@ type cr
  171:       ." Keep-Alive: timeout=15, max=" maxnum @ 0 .r cr
  172:       -1 maxnum +!  ELSE  ." close" cr maxnum off  THEN ;
  173: 
  174: : transparent: ( addr u -- ) Create  here over 1+ allot place
  175:   DOES>  >r  >file
  176:   .connection
  177:   ." Content-Type: "  r> count type cr cr
  178:   data @ IF  transparent  ELSE  nip close-file throw  THEN ;
  179: 
  180: \ mime types                                           26mar00py
  181: 
  182: : mime-read ( addr u -- )  r/o open-file throw
  183:     push-file loadfile !  0 loadline ! blk off
  184:     BEGIN  refill  WHILE
  185: 	char '# <> >in off name nip 0<> and  IF
  186: 	    >in off name
  187: 	    BEGIN  >in @ >r name nip  WHILE
  188: 		r> >in ! 2dup transparent:  REPEAT
  189: 	    2drop rdrop
  190: 	THEN
  191:     REPEAT  loadfile @ close-file pop-file throw ;
  192: 
  193: : lastrequest
  194:   ." Connection: close" cr maxnum off
  195:   ." Content-Type: text/html" cr cr ;
  196: 
  197: wordlist constant mime
  198: mime set-current
  199: 
  200: : shtml ( addr u -- )  lastrequest
  201:     data @ IF  included  ELSE  2drop  THEN ;
  202: 
  203: s" application/pgp-signature" transparent: sig
  204: s" application/x-bzip2" transparent: bz2
  205: s" application/x-gzip" transparent: gz
  206: s" /etc/mime.types" ' mime-read catch [IF]  2drop
  207:     \ no /etc/mime.types found on this machine,
  208:     \ generating the most important types:
  209:     s" text/html" transparent: html
  210:     s" image/gif" transparent: gif
  211:     s" image/png" transparent: png
  212:     s" image/jpg" transparent: jpg
  213: [THEN]
  214: 
  215: definitions
  216: 
  217: s" text/plain" transparent: txt
  218: 
  219: \ http errors                                          26mar00py
  220: 
  221: : .server ( -- )  ." Server: Gforth httpd/1.0 ("
  222:     s" os-class" environment? IF  type  THEN  ." )" cr ;
  223: : .ok  ( -- ) ." HTTP/1.1 200 OK" cr .server ;
  224: : html-error ( n addr u -- )
  225:     ." HTTP/1.1 " 2 pick . 2dup type cr .server
  226:     2 pick &405 = IF ." Allow: GET, HEAD, POST" cr  THEN
  227:     lastrequest
  228:     ." <HTML><HEAD><TITLE>" 2 pick . 2dup type
  229:     ." </TITLE></HEAD>" cr
  230:     ." <BODY><H1>" type drop ." </H1>" cr ;
  231: : .trailer ( -- )
  232:     ." <HR><ADDRESS>Gforth httpd 1.0</ADDRESS>" cr
  233:     ." </BODY></HTML>" cr ;
  234: : .nok ( -- ) command? @ IF  &405 s" Method Not Allowed"
  235:     ELSE  &400 s" Bad Request"  THEN  html-error
  236:     ." <P>Your browser sent a request that this server "
  237:     ." could not understand.</P>" cr
  238:     ." <P>Invalid request in: <CODE>"
  239:     error-stack cell+ 2@ swap type
  240:     ." </CODE></P>" cr .trailer ;
  241: : .nofile ( -- ) &404 s" Not Found" html-error
  242:     ." <P>The requested URL <CODE>" url $@ type
  243:     ." </CODE> was not found on this server</P>" cr .trailer ;
  244: 
  245: \ http server                                          26mar00py
  246: 
  247: Defer redirect?  ( addr u -- addr' u' t / f )
  248: Defer redirect ( addr u -- )
  249: :noname 2drop false ; IS redirect?
  250: 
  251: : http ( -- )  get-input  IF  .nok  ELSE
  252:     IF  url $@ 1 /string 2dup redirect? IF  redirect 2drop  ELSE
  253: 	rework-htmldir
  254: 	dup 0< IF  drop .nofile
  255: 	ELSE  .ok  2dup >mime mime search-wordlist
  256: 	    0= IF  ['] txt  THEN  catch IF  maxnum off THEN
  257: 	THEN  THEN  THEN  THEN  outfile-id flush-file throw ;
  258: 
  259: : httpd  ( n -- )  dup maxnum ! 0 <# #S #> Keep-Alive $!
  260:   maxnum @ 0 DO  ['] http catch  maxnum @ 0= or  ?LEAVE  LOOP ;
  261: 
  262: script? [IF]  :noname &100 httpd bye ; is bootmessage  [THEN]
  263: 
  264: \ Use Forth as server-side script language             26mar00py
  265: 
  266: : $> ( -- )
  267:     BEGIN  source >in @ /string s" <$" search  0= WHILE
  268:         type cr refill  0= UNTIL  EXIT  THEN
  269:     nip source >in @ /string rot - dup 2 + >in +! type ;
  270: : <HTML> ( -- )  ." <HTML>" $> ;
  271: 
  272: \ provide transparent proxying
  273: 
  274: include ./proxy.fs

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