File:  [gforth] / gforth / httpd.fs
Revision 1.15: download - view: text, annotated - select for diffs
Sat Apr 10 00:16:55 2004 UTC (15 years, 7 months ago) by pazsan
Branches: MAIN
CVS tags: HEAD
fixed "too many crashes" in httpd.fs
fixed reentrance problem with callbacks

    1: #! /usr/local/bin/gforth
    2: 
    3: \ Copyright (C) 2000,2002,2003 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: warnings off
   22: 
   23: require string.fs
   24: 
   25: Variable DocumentRoot  s" /usr/local/httpd/htdocs/" DocumentRoot $!
   26: Variable UserDir       s" .html-data/"              UserDir      $!
   27: 
   28: Variable url
   29: Variable posted
   30: Variable url-args
   31: Variable protocol
   32: Variable data
   33: Variable active
   34: Variable command?
   35: 
   36: : get ( addr -- )  name rot $! ;
   37: : get-rest ( addr -- )  source >in @ /string dup >in +! rot $! ;
   38: 
   39: wordlist constant values
   40: wordlist constant commands
   41: 
   42: : value:  ( -- )  name
   43:   Forth definitions 2dup 1- nextname Variable
   44:   values set-current nextname here cell - Create ,
   45:   DOES> @ get-rest ;
   46: : >values  values 1 set-order command? off ;
   47: 
   48: \ HTTP protocol commands                               26mar00py
   49: 
   50: : rework-% ( add -- ) { url }  base @ >r hex
   51:     0 url $@len 0 ?DO
   52: 	url $@ drop I + c@ dup '% = IF
   53: 	    drop 0. url $@ I 1+ /string
   54: 	    2 min dup >r >number r> swap - >r 2drop
   55: 	ELSE  0 >r  THEN  over url $@ drop + c!  1+
   56:     r> 1+ +LOOP  url $!len
   57:     r> base ! ;
   58: 
   59: : rework-? ( addr -- )
   60:     dup >r $@ '? $split url-args $! nip r> $!len ;
   61: 
   62: : get-url ( -- ) url get protocol get-rest
   63:     url rework-? url rework-% >values ;
   64: 
   65: commands set-current
   66: 
   67: : GET   get-url data on  active off ;
   68: : POST  get-url data on  active on  ;
   69: : HEAD  get-url data off active off ;
   70: 
   71: \ HTTP protocol values                                 26mar00py
   72: 
   73: values set-current
   74: 
   75: value: User-Agent:
   76: value: Pragma:
   77: value: Host:
   78: value: Accept:
   79: value: Accept-Encoding:
   80: value: Accept-Language:
   81: value: Accept-Charset:
   82: value: Via:
   83: value: X-Forwarded-For:
   84: value: Cache-Control:
   85: value: Connection:
   86: value: Referer:
   87: value: Content-Type:
   88: value: Content-Length:
   89: value: Keep-Alive:
   90: 
   91: definitions
   92: 
   93: Variable maxnum
   94: 
   95: : ?cr ( -- )
   96:   #tib @ 1 >= IF  source 1- + c@ #cr = #tib +!  THEN ;
   97: : refill-loop ( -- flag )
   98:   BEGIN  refill ?cr  WHILE  ['] interpret catch drop  >in @ 0=  UNTIL
   99:   true  ELSE  maxnum off false  THEN ;
  100: : get-input ( -- flag ior )
  101:   s" /nosuchfile" url $!  s" HTTP/1.0" protocol $!
  102:   s" close" connection $!
  103:   infile-id push-file loadfile !  loadline off  blk off
  104:   commands 1 set-order  command? on  ['] refill-loop catch
  105:   Keep-Alive $@ snumber? dup 0> IF  nip  THEN  IF  maxnum !  THEN
  106:   active @ IF  s" " posted $! Content-Length $@ snumber? drop
  107:       posted $!len  posted $@ infile-id read-file throw drop
  108:   THEN  only forth also  pop-file ;
  109: 
  110: \ Rework HTML directory                                26mar00py
  111: 
  112: Variable htmldir
  113: 
  114: : rework-htmldir ( addr u -- addr' u' / ior )
  115:   htmldir $! htmldir $@ compact.. htmldir $!len drop
  116:   htmldir $@ s" ../" string-prefix?
  117:   IF    -1 EXIT  THEN  \ can't access below current directory
  118:   htmldir $@ s" ~" string-prefix?
  119:   IF    UserDir $@ htmldir dup $@ 2dup '/ scan '/ skip
  120:         nip - nip $ins
  121:   ELSE  DocumentRoot $@ htmldir 0 $ins  THEN
  122:   htmldir $@ 1- 0 max + c@ '/ = htmldir $@len 0= or
  123:   IF  s" index.html" htmldir dup $@len $ins  THEN
  124:   htmldir $@ file-status nip ?dup ?EXIT
  125:   htmldir $@ ;
  126: 
  127: \ MIME type handling                                   26mar00py
  128: 
  129: : >mime ( addr u -- mime u' )  2dup tuck over + 1- ?DO
  130:   I c@ '. = ?LEAVE  1-  -1 +LOOP  /string ;
  131: 
  132: : >file ( addr u -- size fd )
  133:   r/o bin open-file throw >r
  134:   r@ file-size throw drop
  135:   ." Accept-Ranges: bytes" cr
  136:   ." Content-Length: " dup 0 .r cr r> ;
  137: : transparent ( size fd -- ) { fd }
  138:     $4000 allocate throw swap dup 0 ?DO
  139: 	2dup over swap $4000 min fd read-file throw type
  140: 	$4000 - $4000 +LOOP  drop
  141:     free fd close-file throw throw ;
  142: 
  143: \ Keep-Alive handling                                  26mar00py
  144: 
  145: : .connection ( -- )
  146:   ." Connection: "
  147:   connection $@ s" Keep-Alive" str= maxnum @ 0> and
  148:   IF  connection $@ type cr
  149:       ." Keep-Alive: timeout=15, max=" maxnum @ 0 .r cr
  150:       -1 maxnum +!  ELSE  ." close" cr maxnum off  THEN ;
  151: 
  152: : transparent: ( addr u -- ) Create  here over 1+ allot place
  153:   DOES>  >r  >file
  154:   .connection
  155:   ." Content-Type: "  r> count type cr cr
  156:   data @ IF  transparent  ELSE  nip close-file throw  THEN ;
  157: 
  158: \ mime types                                           26mar00py
  159: 
  160: : mime-read ( addr u -- )  r/o open-file throw
  161:     push-file loadfile !  0 loadline ! blk off
  162:     BEGIN  refill  WHILE
  163: 	char '# <> >in off name nip 0<> and  IF
  164: 	    >in off name
  165: 	    BEGIN  >in @ >r name nip  WHILE
  166: 		r> >in ! 2dup transparent:  REPEAT
  167: 	    2drop rdrop
  168: 	THEN
  169:     REPEAT  loadfile @ close-file pop-file throw ;
  170: 
  171: : lastrequest
  172:   ." Connection: close" cr maxnum off
  173:   ." Content-Type: text/html" cr cr ;
  174: 
  175: wordlist constant mime
  176: mime set-current
  177: 
  178: : shtml ( addr u -- )  lastrequest
  179:     data @ IF  included  ELSE  2drop  THEN ;
  180: 
  181: s" application/pgp-signature" transparent: sig
  182: s" application/x-bzip2" transparent: bz2
  183: s" application/x-gzip" transparent: gz
  184: s" /etc/mime.types" mime-read
  185: 
  186: definitions
  187: 
  188: s" text/plain" transparent: txt
  189: 
  190: \ http errors                                          26mar00py
  191: 
  192: : .server ( -- )  ." Server: Gforth httpd/0.1 ("
  193:     s" os-class" environment? IF  type  THEN  ." )" cr ;
  194: : .ok  ( -- ) ." HTTP/1.1 200 OK" cr .server ;
  195: : html-error ( n addr u -- )
  196:     ." HTTP/1.1 " 2 pick . 2dup type cr .server
  197:     2 pick &405 = IF ." Allow: GET, HEAD, POST" cr  THEN
  198:     lastrequest
  199:     ." <HTML><HEAD><TITLE>" 2 pick . 2dup type
  200:     ." </TITLE></HEAD>" cr
  201:     ." <BODY><H1>" type drop ." </H1>" cr ;
  202: : .trailer ( -- )
  203:     ." <HR><ADDRESS>Gforth httpd 0.1</ADDRESS>" cr
  204:     ." </BODY></HTML>" cr ;
  205: : .nok ( -- ) command? @ IF  &405 s" Method Not Allowed"
  206:     ELSE  &400 s" Bad Request"  THEN  html-error
  207:     ." <P>Your browser sent a request that this server "
  208:     ." could not understand.</P>" cr
  209:     ." <P>Invalid request in: <CODE>"
  210:     error-stack cell+ 2@ swap type
  211:     ." </CODE></P>" cr .trailer ;
  212: : .nofile ( -- ) &404 s" Not Found" html-error
  213:     ." <P>The requested URL <CODE>" url $@ type
  214:     ." </CODE> was not found on this server</P>" cr .trailer ;
  215: 
  216: \ http server                                          26mar00py
  217: 
  218: Defer redirect?  ( addr u -- addr' u' t / f )
  219: Defer redirect ( addr u -- )
  220: :noname 2drop false ; IS redirect?
  221: 
  222: : http ( -- )  get-input  IF  .nok  ELSE
  223:     IF  url $@ 1 /string 2dup redirect? IF  redirect 2drop  ELSE
  224: 	rework-htmldir
  225: 	dup 0< IF  drop .nofile
  226: 	ELSE  .ok  2dup >mime mime search-wordlist
  227: 	    0= IF  ['] txt  THEN  catch IF  maxnum off THEN
  228: 	THEN  THEN  THEN  THEN  outfile-id flush-file throw ;
  229: 
  230: : httpd  ( n -- )  dup maxnum ! 0 <# #S #> Keep-Alive $!
  231:   maxnum @ 0 DO  ['] http catch  maxnum @ 0= or  ?LEAVE  LOOP ;
  232: 
  233: script? [IF]  :noname &100 httpd bye ; is bootmessage  [THEN]
  234: 
  235: \ Use Forth as server-side script language             26mar00py
  236: 
  237: : $> ( -- )
  238:     BEGIN  source >in @ /string s" <$" search  0= WHILE
  239:         type cr refill  0= UNTIL  EXIT  THEN
  240:     nip source >in @ /string rot - dup 2 + >in +! type ;
  241: : <HTML> ( -- )  ." <HTML>" $> ;
  242: 
  243: \ provide transparent proxying
  244: 
  245: include ./proxy.fs

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