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Annotation of gforth/httpd.fs, revision 1.8

1.1       pazsan      1: #! /usr/local/bin/gforth
                      2: 
1.6       anton       3: \ Copyright (C) 2000 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
1.7       anton      19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.6       anton      20: 
1.1       pazsan     21: warnings off
                     22: 
1.8     ! pazsan     23: require string.fs
1.1       pazsan     24: 
                     25: Variable url
1.4       pazsan     26: Variable posted
                     27: Variable url-args
1.1       pazsan     28: Variable protocol
1.2       pazsan     29: Variable data
1.4       pazsan     30: Variable active
1.2       pazsan     31: Variable command?
1.1       pazsan     32: 
                     33: : get ( addr -- )  name rot $! ;
                     34: : get-rest ( addr -- )  source >in @ /string dup >in +! rot $! ;
                     35: 
1.4       pazsan     36: wordlist constant values
                     37: wordlist constant commands
1.1       pazsan     38: 
1.2       pazsan     39: : value:  ( -- )  name
1.1       pazsan     40:   Forth definitions 2dup 1- nextname Variable
1.2       pazsan     41:   values set-current nextname here cell - Create ,
1.1       pazsan     42:   DOES> @ get-rest ;
1.2       pazsan     43: : >values  values 1 set-order command? off ;
1.1       pazsan     44: 
1.2       pazsan     45: \ HTTP protocol commands                               26mar00py
1.1       pazsan     46: 
1.4       pazsan     47: : rework-% ( add -- ) { url }  base @ >r hex
1.2       pazsan     48:     0 url $@len 0 ?DO
                     49:        url $@ drop I + c@ dup '% = IF
                     50:            drop 0. url $@ I 1+ /string
                     51:            2 min dup >r >number r> swap - >r 2drop
                     52:        ELSE  0 >r  THEN  over url $@ drop + c!  1+
                     53:     r> 1+ +LOOP  url $!len
                     54:     r> base ! ;
                     55: 
1.5       pazsan     56: : rework-? ( addr -- )
                     57:     dup >r $@ '? $split url-args $! nip r> $!len ;
1.4       pazsan     58: 
1.5       pazsan     59: : get-url ( -- ) url get protocol get-rest
1.4       pazsan     60:     url rework-? url rework-% >values ;
                     61: 
1.2       pazsan     62: commands set-current
                     63: 
1.4       pazsan     64: : GET   get-url data on  active off ;
                     65: : POST  get-url data on  active on  ;
                     66: : HEAD  get-url data off active off ;
1.2       pazsan     67: 
                     68: \ HTTP protocol values                                 26mar00py
                     69: 
                     70: values set-current
                     71: 
                     72: value: User-Agent:
                     73: value: Pragma:
                     74: value: Host:
                     75: value: Accept:
                     76: value: Accept-Encoding:
                     77: value: Accept-Language:
                     78: value: Accept-Charset:
                     79: value: Via:
                     80: value: X-Forwarded-For:
                     81: value: Cache-Control:
                     82: value: Connection:
                     83: value: Referer:
1.4       pazsan     84: value: Content-Type:
                     85: value: Content-Length:
1.1       pazsan     86: 
                     87: definitions
                     88: 
                     89: Variable maxnum
                     90: 
                     91: : ?cr ( -- )
                     92:   #tib @ 1 >= IF  source 1- + c@ #cr = #tib +!  THEN ;
                     93: : refill-loop ( -- flag )
                     94:   BEGIN  refill ?cr  WHILE  interpret  >in @ 0=  UNTIL
                     95:   true  ELSE  maxnum off false  THEN ;
                     96: : get-input ( -- flag ior )
1.3       pazsan     97:   s" /nosuchfile" url $!  s" HTTP/1.0" protocol $!
1.2       pazsan     98:   s" close" connection $!
1.3       pazsan     99:   infile-id push-file loadfile !  loadline off  blk off
1.2       pazsan    100:   commands 1 set-order  command? on  ['] refill-loop catch
1.4       pazsan    101:   active @ IF  s" " posted $! Content-Length $@ snumber? drop
                    102:       posted $!len  posted $@ infile-id read-file throw drop
                    103:   THEN  only forth also  pop-file ;
1.1       pazsan    104: 
                    105: \ Rework HTML directory                                26mar00py
                    106: 
                    107: Variable htmldir
                    108: 
                    109: : rework-htmldir ( addr u -- addr' u' / ior )
                    110:   htmldir $!
                    111:   htmldir $@ 1 min s" ~" compare 0=
                    112:   IF    s" /.html-data" htmldir dup $@ 2dup '/ scan
                    113:         nip - nip $ins
                    114:   ELSE  s" /usr/local/httpd/htdocs/" htmldir 0 $ins  THEN
                    115:   htmldir $@ 1- 0 max + c@ '/ = htmldir $@len 0= or
                    116:   IF  s" index.html" htmldir dup $@len $ins  THEN
                    117:   htmldir $@ file-status nip ?dup ?EXIT
                    118:   htmldir $@ ;
                    119: 
                    120: \ MIME type handling                                   26mar00py
                    121: 
                    122: : >mime ( addr u -- mime u' )  2dup tuck over + 1- ?DO
                    123:   I c@ '. = ?LEAVE  1-  -1 +LOOP  /string ;
                    124: 
                    125: : >file ( addr u -- size fd )
                    126:   r/o bin open-file throw >r
                    127:   r@ file-size throw drop
                    128:   ." Accept-Ranges: bytes" cr
                    129:   ." Content-Length: " dup 0 .r cr r> ;
1.4       pazsan    130: : transparent ( size fd -- ) { fd }
                    131:     $4000 allocate throw swap dup 0 ?DO
                    132:        2dup over swap $4000 min fd read-file throw type
                    133:        $4000 - $4000 +LOOP  drop
                    134:     free fd close-file throw throw ;
1.1       pazsan    135: 
1.5       pazsan    136: \ Keep-Alive handling                                  26mar00py
                    137: 
                    138: : .connection ( -- )
                    139:   ." Connection: "
                    140:   connection $@ s" Keep-Alive" compare 0= maxnum @ 0> and
                    141:   IF  connection $@ type cr
                    142:       ." Keep-Alive: timeout=15, max=" maxnum @ 0 .r cr
                    143:       -1 maxnum +!  ELSE  ." close" cr maxnum off  THEN ;
                    144: 
1.2       pazsan    145: : transparent: ( addr u -- ) Create  here over 1+ allot place
                    146:   DOES>  >r  >file
1.1       pazsan    147:   .connection
                    148:   ." Content-Type: "  r> count type cr cr
1.2       pazsan    149:   data @ IF  transparent  ELSE  nip close-file throw  THEN ;
1.1       pazsan    150: 
                    151: \ mime types                                           26mar00py
                    152: 
1.2       pazsan    153: : mime-read ( addr u -- )  r/o open-file throw
                    154:     push-file loadfile !  0 loadline ! blk off
                    155:     BEGIN  refill  WHILE  name
                    156:        BEGIN  >in @ >r name nip  WHILE
                    157:            r> >in ! 2dup transparent:  REPEAT
                    158:        2drop rdrop
                    159:     REPEAT  loadfile @ close-file pop-file throw ;
                    160: 
1.1       pazsan    161: : lastrequest
                    162:   ." Connection: close" cr maxnum off
                    163:   ." Content-Type: text/html" cr cr ;
                    164: 
                    165: wordlist constant mime
                    166: mime set-current
                    167: 
1.2       pazsan    168: : shtml ( addr u -- )  lastrequest
                    169:     data @ IF  included  ELSE  2drop  THEN ;
1.1       pazsan    170: 
1.2       pazsan    171: s" application/pgp-signature" transparent: sig
                    172: s" application/x-bzip2" transparent: bz2
                    173: s" application/x-gzip" transparent: gz
                    174: s" /etc/mime.types" mime-read
1.1       pazsan    175: 
                    176: definitions
                    177: 
1.2       pazsan    178: s" text/plain" transparent: txt
1.1       pazsan    179: 
                    180: \ http errors                                          26mar00py
                    181: 
1.5       pazsan    182: : .server ( -- )  ." Server: Gforth httpd/0.1 ("
1.2       pazsan    183:     s" os-class" environment? IF  type  THEN  ." )" cr ;
1.5       pazsan    184: : .ok  ( -- ) ." HTTP/1.1 200 OK" cr .server ;
1.1       pazsan    185: : html-error ( n addr u -- )
1.2       pazsan    186:     ." HTTP/1.1 " 2 pick . 2dup type cr .server
1.5       pazsan    187:     2 pick &405 = IF ." Allow: GET, HEAD, POST" cr  THEN
                    188:     lastrequest
                    189:     ." <HTML><HEAD><TITLE>" 2 pick . 2dup type
                    190:     ." </TITLE></HEAD>" cr
1.1       pazsan    191:     ." <BODY><H1>" type drop ." </H1>" cr ;
                    192: : .trailer ( -- )
                    193:     ." <HR><ADDRESS>Gforth httpd 0.1</ADDRESS>" cr
                    194:     ." </BODY></HTML>" cr ;
1.5       pazsan    195: : .nok ( -- ) command? @ IF  &405 s" Method Not Allowed"
1.2       pazsan    196:     ELSE  &400 s" Bad Request"  THEN  html-error
1.5       pazsan    197:     ." <P>Your browser sent a request that this server "
                    198:     ." could not understand.</P>" cr
                    199:     ." <P>Invalid request in: <CODE>"
                    200:     error-stack cell+ 2@ swap type
1.1       pazsan    201:     ." </CODE></P>" cr .trailer ;
1.5       pazsan    202: : .nofile ( -- ) &404 s" Not Found" html-error
1.1       pazsan    203:     ." <P>The requested URL <CODE>" url $@ type
                    204:     ." </CODE> was not found on this server</P>" cr .trailer ;
                    205: 
                    206: \ http server                                          26mar00py
                    207: 
1.5       pazsan    208: : http ( -- )  get-input  IF  .nok  ELSE
1.1       pazsan    209:     IF  url $@ 1 /string rework-htmldir
                    210:        dup 0< IF  drop .nofile
                    211:        ELSE  .ok  2dup >mime mime search-wordlist
1.2       pazsan    212:            0= IF  ['] txt  THEN  catch IF  maxnum off THEN
1.1       pazsan    213:        THEN  THEN  THEN  outfile-id flush-file throw ;
                    214: 
                    215: : httpd  ( n -- )  maxnum !
1.3       pazsan    216:   BEGIN  ['] http catch  maxnum @ 0= or  UNTIL ;
1.1       pazsan    217: 
1.4       pazsan    218: script? [IF]  :noname &100 httpd bye ; is bootmessage  [THEN]
1.5       pazsan    219: 
                    220: \ Use Forth as server-side script language             26mar00py
                    221: 
                    222: : $> ( -- )
                    223:     BEGIN  source >in @ /string s" <$" search  0= WHILE
                    224:         type cr refill  0= UNTIL  EXIT  THEN
                    225:     nip source >in @ /string rot - dup 2 + >in +! type ;
                    226: : <HTML> ( -- )  ." <HTML>" $> ;