File:  [gforth] / gforth / httpd.fs
Revision 1.2: download - view: text, annotated - select for diffs
Sun Apr 2 20:18:27 2000 UTC (19 years, 7 months ago) by pazsan
Branches: MAIN
CVS tags: HEAD
Better colorizing
Tiny changes to history.fs to allow a seek in history (not finished yet)
Some imporvements to the httpd example

    1: #! /usr/local/bin/gforth
    2: 
    3: warnings off
    4: 
    5: include string.fs
    6: 
    7: Variable url
    8: Variable protocol
    9: Variable data
   10: Variable command?
   11: 
   12: : get ( addr -- )  name rot $! ;
   13: : get-rest ( addr -- )  source >in @ /string dup >in +! rot $! ;
   14: 
   15: Table constant values
   16: Table constant commands
   17: 
   18: : value:  ( -- )  name
   19:   Forth definitions 2dup 1- nextname Variable
   20:   values set-current nextname here cell - Create ,
   21:   DOES> @ get-rest ;
   22: : >values  values 1 set-order command? off ;
   23: 
   24: \ HTTP protocol commands                               26mar00py
   25: 
   26: : rework-% ( -- )  base @ >r hex
   27:     0 url $@len 0 ?DO
   28: 	url $@ drop I + c@ dup '% = IF
   29: 	    drop 0. url $@ I 1+ /string
   30: 	    2 min dup >r >number r> swap - >r 2drop
   31: 	ELSE  0 >r  THEN  over url $@ drop + c!  1+
   32:     r> 1+ +LOOP  url $!len
   33:     r> base ! ;
   34: 
   35: commands set-current
   36: 
   37: : GET   url get rework-% protocol get-rest >values data on  ;
   38: : HEAD  url get rework-% protocol get-rest >values data off ;
   39: 
   40: \ HTTP protocol values                                 26mar00py
   41: 
   42: values set-current
   43: 
   44: value: User-Agent:
   45: value: Pragma:
   46: value: Host:
   47: value: Accept:
   48: value: Accept-Encoding:
   49: value: Accept-Language:
   50: value: Accept-Charset:
   51: value: Via:
   52: value: X-Forwarded-For:
   53: value: Cache-Control:
   54: value: Connection:
   55: value: Referer:
   56: 
   57: definitions
   58: 
   59: s" HTTP/1.0" protocol $!
   60: 
   61: Variable maxnum
   62: 
   63: : ?cr ( -- )
   64:   #tib @ 1 >= IF  source 1- + c@ #cr = #tib +!  THEN ;
   65: : refill-loop ( -- flag )
   66:   BEGIN  refill ?cr  WHILE  interpret  >in @ 0=  UNTIL
   67:   true  ELSE  maxnum off false  THEN ;
   68: : get-input ( -- flag ior )
   69:   s" /nosuchfile" url $!
   70:   s" close" connection $!
   71:   infile-id push-file loadfile !  0 loadline ! blk off
   72:   commands 1 set-order  command? on  ['] refill-loop catch
   73:   only forth also  pop-file ;
   74: 
   75: \ Keep-Alive handling                                  26mar00py
   76: 
   77: : .connection ( -- )
   78:   ." Connection: "
   79:   connection $@ s" Keep-Alive" compare 0= maxnum @ 0> and
   80:   IF  connection $@ type cr
   81:       ." Keep-Alive: timeout=15, max=" maxnum @ 0 .r cr
   82:       -1 maxnum +!  ELSE  ." close" cr maxnum off  THEN ;
   83: 
   84: \ Use Forth as server-side script language             26mar00py
   85: 
   86: : $> ( -- )
   87:     BEGIN  source >in @ /string s" <$" search  0= WHILE
   88:         type cr refill  0= UNTIL  EXIT  THEN
   89:     nip source >in @ /string rot - dup 2 + >in +! type ;
   90: : <HTML> ( -- )  ." <HTML>" $> ;
   91: 
   92: \ Rework HTML directory                                26mar00py
   93: 
   94: Variable htmldir
   95: 
   96: : rework-htmldir ( addr u -- addr' u' / ior )
   97:   htmldir $!
   98:   htmldir $@ 1 min s" ~" compare 0=
   99:   IF    s" /.html-data" htmldir dup $@ 2dup '/ scan
  100:         nip - nip $ins
  101:   ELSE  s" /usr/local/httpd/htdocs/" htmldir 0 $ins  THEN
  102:   htmldir $@ 1- 0 max + c@ '/ = htmldir $@len 0= or
  103:   IF  s" index.html" htmldir dup $@len $ins  THEN
  104:   htmldir $@ file-status nip ?dup ?EXIT
  105:   htmldir $@ ;
  106: 
  107: \ MIME type handling                                   26mar00py
  108: 
  109: : >mime ( addr u -- mime u' )  2dup tuck over + 1- ?DO
  110:   I c@ '. = ?LEAVE  1-  -1 +LOOP  /string ;
  111: 
  112: : >file ( addr u -- size fd )
  113:   r/o bin open-file throw >r
  114:   r@ file-size throw drop
  115:   ." Accept-Ranges: bytes" cr
  116:   ." Content-Length: " dup 0 .r cr r> ;
  117: : transparent ( size fd -- ) >r
  118:   dup allocate throw swap
  119:   over swap r@ read-file throw over swap type
  120:   free r> close-file throw throw ;
  121: 
  122: : transparent: ( addr u -- ) Create  here over 1+ allot place
  123:   DOES>  >r  >file
  124:   .connection
  125:   ." Content-Type: "  r> count type cr cr
  126:   data @ IF  transparent  ELSE  nip close-file throw  THEN ;
  127: 
  128: \ mime types                                           26mar00py
  129: 
  130: : mime-read ( addr u -- )  r/o open-file throw
  131:     push-file loadfile !  0 loadline ! blk off
  132:     BEGIN  refill  WHILE  name
  133: 	BEGIN  >in @ >r name nip  WHILE
  134: 	    r> >in ! 2dup transparent:  REPEAT
  135: 	2drop rdrop
  136:     REPEAT  loadfile @ close-file pop-file throw ;
  137: 
  138: : lastrequest
  139:   ." Connection: close" cr maxnum off
  140:   ." Content-Type: text/html" cr cr ;
  141: 
  142: wordlist constant mime
  143: mime set-current
  144: 
  145: : shtml ( addr u -- )  lastrequest
  146:     data @ IF  included  ELSE  2drop  THEN ;
  147: 
  148: s" application/pgp-signature" transparent: sig
  149: s" application/x-bzip2" transparent: bz2
  150: s" application/x-gzip" transparent: gz
  151: s" /etc/mime.types" mime-read
  152: 
  153: definitions
  154: 
  155: s" text/plain" transparent: txt
  156: 
  157: \ http errors                                          26mar00py
  158: 
  159: : .server ." Server: Gforth httpd/0.1 ("
  160:     s" os-class" environment? IF  type  THEN  ." )" cr ;
  161: : .ok   ." HTTP/1.1 200 OK" cr .server ;
  162: : html-error ( n addr u -- )
  163:     ." HTTP/1.1 " 2 pick . 2dup type cr .server
  164:     2 pick &405 = IF ." Allow: GET, HEAD" cr  THEN  lastrequest
  165:     ." <HTML><HEAD><TITLE>" 2 pick . 2dup type ." </TITLE></HEAD>" cr
  166:     ." <BODY><H1>" type drop ." </H1>" cr ;
  167: : .trailer ( -- )
  168:     ." <HR><ADDRESS>Gforth httpd 0.1</ADDRESS>" cr
  169:     ." </BODY></HTML>" cr ;
  170: : .nok  command? @ IF  &405 s" Method Not Allowed"
  171:     ELSE  &400 s" Bad Request"  THEN  html-error
  172:     ." <P>Your browser sent a request that this server could not understand.</P>" cr
  173:     ." <P>Invalid request in: <CODE>" error-stack cell+ 2@ swap type
  174:     ." </CODE></P>" cr .trailer ;
  175: : .nofile  &404 s" Not Found" html-error
  176:     ." <P>The requested URL <CODE>" url $@ type
  177:     ." </CODE> was not found on this server</P>" cr .trailer ;
  178: 
  179: \ http server                                          26mar00py
  180: 
  181: : http  get-input  IF  .nok  ELSE
  182:     IF  url $@ 1 /string rework-htmldir
  183: 	dup 0< IF  drop .nofile
  184: 	ELSE  .ok  2dup >mime mime search-wordlist
  185: 	    0= IF  ['] txt  THEN  catch IF  maxnum off THEN
  186: 	THEN  THEN  THEN  outfile-id flush-file throw ;
  187: 
  188: : httpd  ( n -- )  maxnum !
  189:   BEGIN  http  maxnum @ 0=  UNTIL ;
  190: 
  191: script? [IF]  &100 httpd bye  [THEN]

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