| 1 | (* |
| 2 | * Dynamic web page generation with Standard ML |
| 3 | * Copyright (C) 2003 Adam Chlipala |
| 4 | * |
| 5 | * This library is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU Lesser General Public |
| 7 | * License as published by the Free Software Foundation; either |
| 8 | * version 2.1 of the License, or (at your option) any later version. |
| 9 | * |
| 10 | * This library is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * Lesser General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU Lesser General Public |
| 16 | * License along with this library; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | *) |
| 19 | |
| 20 | (* Main CGI program interface *) |
| 21 | |
| 22 | functor MainFn (Templates : TEMPLATES) :> MAIN = |
| 23 | struct |
| 24 | val templates = foldl StringMap.insert' StringMap.empty Templates.templates |
| 25 | |
| 26 | fun main (_, args) = |
| 27 | let |
| 28 | val _ = Cgi.init () |
| 29 | val cgiFields = Cgi.cgi_fieldnames () |
| 30 | fun mapper name = (name, Cgi.cgi_field_strings name) |
| 31 | in |
| 32 | Web.pushParams (map mapper cgiFields); |
| 33 | case args of |
| 34 | [] => (print "Status: 500\nContent-type: text/html\n\n<html><head><title>500 error</title></head><body><h2>500 error</h2>No template was specified</body></html>\n"; |
| 35 | OS.Process.failure) |
| 36 | | (name::_) => |
| 37 | (case StringMap.find (templates, name) of |
| 38 | NONE => (print "Status: 404\nContent-type: text/html\n\n<html><head><title>404 error</title></head><body><h2>404 error</h2>Template not found</body></html>\n"; |
| 39 | OS.Process.failure) |
| 40 | | SOME f => (f (); |
| 41 | Web.output (); |
| 42 | OS.Process.success)) |
| 43 | end handle Fail msg => (print "Status: 500\nContent-type: text/plain\n\nFatal error: \n\n"; |
| 44 | print msg; |
| 45 | OS.Process.failure) |
| 46 | | ex => (print "Status: 500\nContent-type: text/plain\n\nAn exception!\n\n"; |
| 47 | app (fn s => print (s ^ "\n")) (SMLofNJ.exnHistory ex); |
| 48 | OS.Process.failure) |
| 49 | end |