Annotation of gforth/proxy.fs, revision 1.13
1.1 pazsan 1: \ a http proxy
2:
1.13 ! anton 3: \ Copyright (C) 2000,2002,2003,2006,2007 Free Software Foundation, Inc.
1.1 pazsan 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
1.12 anton 9: \ as published by the Free Software Foundation, either version 3
1.1 pazsan 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
1.12 anton 18: \ along with this program. If not, see http://www.gnu.org/licenses/.
1.1 pazsan 19:
20: require unix/socket.fs
21:
22: Create crlf #cr c, #lf c,
23:
24: : writeln ( addr u fd -- )
25: dup >r write-file throw crlf 2 r> write-file throw ;
26:
27: : request ( host u request u proxy-host u port -- fid )
28: open-socket >r
29: r@ write-file throw s" HTTP/1.1" r@ writeln
30: s" Host: " r@ write-file throw r@ writeln
31: s" Connection: close" r@ writeln
32: s" User-Agent: " r@ write-file throw
33: User-Agent @ IF
34: User-Agent $@ r@ write-file throw s" via Gforth Proxy 0.1"
35: ELSE s" Gforth Proxy 0.1" THEN r@ writeln
36: s" " r@ writeln r> ;
37:
1.10 pazsan 38: Variable proxy \ s" proxy" proxy $! \ replace that with your proxy host
39: Variable proxy-port \ 8080 proxy-port ! \ replace that with your proxy port
1.1 pazsan 40:
1.10 pazsan 41: \ set proxy to your local proxy, and proxy-port to your local proxy port
42: \ if you need any.
1.1 pazsan 43:
44: : http-open ( host u request u -- fid )
1.10 pazsan 45: proxy @ 0= IF 2over 80 ELSE proxy $@ proxy-port @ THEN request ;
1.1 pazsan 46:
47: wordlist Constant response
48: wordlist Constant response-values
49:
50: Variable response-string
51:
52: : response: ( -- ) name
53: Forth definitions 2dup 1- nextname Variable
54: response-values set-current nextname here cell - Create ,
55: DOES> @ get-rest ;
56: : >response response-values 1 set-order ;
57:
58: response set-current
59:
60: : HTTP/1.1 response-string get-rest >response ;
61: : HTTP/1.0 response-string get-rest >response ;
62:
63: \ response variables
64:
65: Forth definitions
66:
67: response: Allow:
68: response: Age:
1.4 pazsan 69: response: Accept-Ranges:
1.1 pazsan 70: response: Cache-Control:
71: response: Connection:
72: response: Proxy-Connection:
73: response: Content-Base:
74: response: Content-Encoding:
75: response: Content-Language:
76: response: Content-Length:
77: response: Content-Location:
78: response: Content-MD5:
79: response: Content-Range:
80: response: Content-Type:
81: response: Date:
82: response: ETag:
83: response: Expires:
1.4 pazsan 84: response: Last-Modified:
1.1 pazsan 85: response: Location:
86: response: Mime-Version:
87: response: Proxy-Authenticate:
1.4 pazsan 88: response: Proxy-Connection:
1.1 pazsan 89: response: Public:
90: response: Retry-After:
91: response: Server:
92: response: Transfer-Encoding:
93: response: Upgrade:
94: response: Via:
95: response: Warning:
96: response: WWW-Authenticate:
97: response: X-Cache:
98: response: X-Powered-By:
99:
100: Forth definitions
101:
102: \ response handling
103:
104: : get-response ( fid -- ior )
105: push-file loadfile ! loadline off blk off
106: response 1 set-order ['] refill-loop catch
107: only forth also pop-file ;
108:
109: \ data handling
110:
111: Variable data-buffer
112:
113: : clear-data ( -- )
114: s" " data-buffer $! ;
115: : add-chunk ( u fid -- u' )
116: swap data-buffer $@len dup >r + data-buffer $!len
117: data-buffer $@ r@ /string rot read-file throw
118: dup r> + data-buffer $!len ;
119: : read-sized ( u fid -- )
120: add-chunk drop ;
121: : read-to-end ( fid -- )
122: >r BEGIN $1000 r@ add-chunk $1000 <> UNTIL rdrop ;
123:
124: : read-chunked ( fid -- ) base @ >r hex >r
125: BEGIN pad $100 r@ read-line throw WHILE
126: pad swap s>number drop dup WHILE r@ add-chunk drop
127: pad 1 r@ read-line throw nip 0= UNTIL
128: ELSE drop THEN THEN rdrop r> base ! ;
129:
130: : read-data ( fid -- ) clear-data >r
131: Content-Length @ IF
132: Content-Length $@ s>number drop r> read-sized EXIT THEN
133: Transfer-Encoding @ IF
1.7 anton 134: Transfer-Encoding $@ s" chunked" str= 0= IF
1.1 pazsan 135: r> read-chunked EXIT THEN THEN
136: r> read-to-end ;
137:
138: \ convert data
139:
140: : convert-data ( -- )
141: \ stub
142: ;
143:
144: \ write response
145:
146: : write-response ( -- ) \ stub -- we really want to mirror what we got
147: .ok
148: ." Connection: close" cr
149: ." Accept-Ranges: bytes" cr
150: ." Content-Type: " Content-Type $@ type cr
151: ." Content-Length: " data-buffer $@len 0 .r cr cr ;
152:
153: \ write data
154:
155: : write-data ( -- )
156: data-buffer $@ type ;
157:
158: \ handle proxy request
159:
1.5 pazsan 160: : handle-request ( fid -- )
1.1 pazsan 161: dup >r get-response throw
162: r@ read-data r> close-file throw
163: convert-data write-response write-data ;
164:
165: \ request redirection
166:
167: wordlist Constant redirects
168:
169: Variable redir$
170: Variable host$
171:
172: : redirect: ( "path" host<"> redirecton<"> -- ) Create
173: [char] " parse here over char+ allot place
174: [char] " parse here over char+ allot place
175: DOES> ( -- addr u )
176: data @ IF s" GET " ELSE s" HEAD " THEN redir$ $!
177: count 2dup host$ $! +
178: count redir$ $+!
179: source >in @ /string dup >in +!
180: 2dup bounds ?DO I c@ #lf = IF '/ I c! THEN LOOP
181: redir$ $+! redir$ $@ ;
182:
183: : (redirect?) ( addr u -- addr' u' t / f )
184: htmldir $! htmldir $@ bounds ?DO
185: I c@ '/ = IF #lf I c! THEN LOOP
1.5 pazsan 186: redirects 1 set-order redir$ $off
1.1 pazsan 187: htmldir $@ ['] evaluate catch
1.6 pazsan 188: IF 2drop false ELSE redir$ @ 0<> THEN ;
1.1 pazsan 189:
1.5 pazsan 190: : (redirect) ( -- )
1.10 pazsan 191: host$ $@ redir$ $@ http-open handle-request maxnum off ;
1.1 pazsan 192:
193: ' (redirect?) IS redirect?
194: ' (redirect) IS redirect
195:
196: \ example
197:
198: redirects set-current
199: get-order redirects swap 1+ set-order
200:
201: Vocabulary systems
1.10 pazsan 202: Vocabulary humor
1.1 pazsan 203:
204: also systems definitions
205:
1.10 pazsan 206: redirect: bigforth bigforth.sourceforge.net"/"
207:
208: humor definitions
209:
210: redirect: bush www.jwdt.com"/~paysan/bush/"
1.1 pazsan 211:
212: previous previous definitions
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