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Annotation of gforth/httpd.fs, revision 1.2

1.1       pazsan      1: #! /usr/local/bin/gforth
                      2: 
                      3: warnings off
                      4: 
                      5: include string.fs
                      6: 
                      7: Variable url
                      8: Variable protocol
1.2     ! pazsan      9: Variable data
        !            10: Variable command?
1.1       pazsan     11: 
                     12: : get ( addr -- )  name rot $! ;
                     13: : get-rest ( addr -- )  source >in @ /string dup >in +! rot $! ;
                     14: 
1.2     ! pazsan     15: Table constant values
        !            16: Table constant commands
1.1       pazsan     17: 
1.2     ! pazsan     18: : value:  ( -- )  name
1.1       pazsan     19:   Forth definitions 2dup 1- nextname Variable
1.2     ! pazsan     20:   values set-current nextname here cell - Create ,
1.1       pazsan     21:   DOES> @ get-rest ;
1.2     ! pazsan     22: : >values  values 1 set-order command? off ;
1.1       pazsan     23: 
1.2     ! pazsan     24: \ HTTP protocol commands                               26mar00py
1.1       pazsan     25: 
1.2     ! pazsan     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:
1.1       pazsan     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 )
1.2     ! pazsan     69:   s" /nosuchfile" url $!
        !            70:   s" close" connection $!
1.1       pazsan     71:   infile-id push-file loadfile !  0 loadline ! blk off
1.2     ! pazsan     72:   commands 1 set-order  command? on  ['] refill-loop catch
1.1       pazsan     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: 
1.2     ! pazsan    122: : transparent: ( addr u -- ) Create  here over 1+ allot place
        !           123:   DOES>  >r  >file
1.1       pazsan    124:   .connection
                    125:   ." Content-Type: "  r> count type cr cr
1.2     ! pazsan    126:   data @ IF  transparent  ELSE  nip close-file throw  THEN ;
1.1       pazsan    127: 
                    128: \ mime types                                           26mar00py
                    129: 
1.2     ! pazsan    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: 
1.1       pazsan    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: 
1.2     ! pazsan    145: : shtml ( addr u -- )  lastrequest
        !           146:     data @ IF  included  ELSE  2drop  THEN ;
1.1       pazsan    147: 
1.2     ! pazsan    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
1.1       pazsan    152: 
                    153: definitions
                    154: 
1.2     ! pazsan    155: s" text/plain" transparent: txt
1.1       pazsan    156: 
                    157: \ http errors                                          26mar00py
                    158: 
1.2     ! pazsan    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 ;
1.1       pazsan    162: : html-error ( n addr u -- )
1.2     ! pazsan    163:     ." HTTP/1.1 " 2 pick . 2dup type cr .server
        !           164:     2 pick &405 = IF ." Allow: GET, HEAD" cr  THEN  lastrequest
1.1       pazsan    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 ;
1.2     ! pazsan    170: : .nok  command? @ IF  &405 s" Method Not Allowed"
        !           171:     ELSE  &400 s" Bad Request"  THEN  html-error
1.1       pazsan    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
1.2     ! pazsan    185:            0= IF  ['] txt  THEN  catch IF  maxnum off THEN
1.1       pazsan    186:        THEN  THEN  THEN  outfile-id flush-file throw ;
                    187: 
                    188: : httpd  ( n -- )  maxnum !
                    189:   BEGIN  http  maxnum @ 0=  UNTIL ;
                    190: 
1.2     ! pazsan    191: script? [IF]  &100 httpd bye  [THEN]