mdw@git.distorted.org.uk Git - disorder/blob - server/login.c

   1 /*
   2  * This file is part of DisOrder.
   3  * Copyright (C) 2008 Richard Kettlewell
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  18  * USA
  19  */
  20
  21 #include "disorder-cgi.h"
  22
  23 /** @brief Client used by CGI
  24  *
  25  * The caller should arrange for this to be created before any of
  26  * these expansions are used (if it cannot connect then it's safe to
  27  * leave it as NULL).
  28  */
  29 disorder_client *dcgi_client;
  30
  31 /** @brief Login cookie */
  32 char *dcgi_cookie;
  33
  34 /** @brief Return a Cookie: header */
  35 char *dcgi_cookie_header(void) {
  36   struct dynstr d[1];
  37   struct url u;
  38   char *s;
  39
  40   memset(&u, 0, sizeof u);
  41   dynstr_init(d);
  42   parse_url(config->url, &u);
  43   if(dcgi_cookie) {
  44     dynstr_append_string(d, "disorder=");
  45     dynstr_append_string(d, dcgi_cookie);
  46   } else {
  47     /* Force browser to discard cookie */
  48     dynstr_append_string(d, "disorder=none;Max-Age=0");
  49   }
  50   if(u.path) {
  51     /* The default domain matches the request host, so we need not override
  52      * that.  But the default path only goes up to the rightmost /, which would
  53      * cause the browser to expose the cookie to other CGI programs on the same
  54      * web server. */
  55     dynstr_append_string(d, ";Version=1;Path=");
  56     /* Formally we are supposed to quote the path, since it invariably has a
  57      * slash in it.  However Safari does not parse quoted paths correctly, so
  58      * this won't work.  Fortunately nothing else seems to care about proper
  59      * quoting of paths, so in practice we get with it.  (See also
  60      * parse_cookie() where we are liberal about cookie paths on the way back
  61      * in.) */
  62     dynstr_append_string(d, u.path);
  63   }
  64   dynstr_terminate(d);
  65   byte_xasprintf(&s, "Set-Cookie: %s", d->vec);
  66   return s;
  67 }
  68
  69 /** @brief Log in as the current user or guest if none */
  70 void dcgi_login(void) {
  71   /* Junk old data */
  72   dcgi_lookup_reset();
  73   /* Junk the old connection if there is one */
  74   if(dcgi_client)
  75     disorder_close(dcgi_client);
  76   /* Create a new connection */
  77   dcgi_client = disorder_new(0);
  78   /* Reconnect */
  79   if(disorder_connect_cookie(dcgi_client, dcgi_cookie)) {
  80     dcgi_error("Cannot connect to server");
  81     exit(0);
  82   }
  83   /* If there was a cookie but it went bad, we forget it */
  84   if(dcgi_cookie && !strcmp(disorder_user(dcgi_client), "guest"))
  85     dcgi_cookie = 0;
  86 }
  87
  88 /*
  89 Local Variables:
  90 c-basic-offset:2
  91 comment-column:40
  92 fill-column:79
  93 indent-tabs-mode:nil
  94 End:
  95 */