exchange

Base system with REST service to issue digital coins, run by the payment service provider
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mhd.c (2834B)

      1 /*
      2   This file is part of TALER
      3   Copyright (C) 2014-2020 Taler Systems SA
      4 
      5   TALER is free software; you can redistribute it and/or modify it under the
      6   terms of the GNU General Public License as published by the Free Software
      7   Foundation; either version 3, or (at your option) any later version.
      8 
      9   TALER is distributed in the hope that it will be useful, but WITHOUT ANY
     10   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
     11   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
     12 
     13   You should have received a copy of the GNU General Public License along with
     14   TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
     15 */
     16 /**
     17  * @file mhd.c
     18  * @brief MHD utility functions (used by the merchant backend)
     19  * @author Christian Grothoff
     20  */
     21 #include "taler/taler_util.h"
     22 #include "taler/taler_mhd_lib.h"
     23 
     24 
     25 enum GNUNET_GenericReturnValue
     26 TALER_mhd_is_https (struct MHD_Connection *connection)
     27 {
     28   const union MHD_ConnectionInfo *ci;
     29   const union MHD_DaemonInfo *di;
     30   const char *forwarded_proto = MHD_lookup_connection_value (connection,
     31                                                              MHD_HEADER_KIND,
     32                                                              "X-Forwarded-Proto");
     33 
     34   if (NULL != forwarded_proto)
     35   {
     36     if (0 == strcasecmp (forwarded_proto,
     37                          "https"))
     38       return GNUNET_YES;
     39     if (0 == strcasecmp (forwarded_proto,
     40                          "http"))
     41       return GNUNET_NO;
     42     GNUNET_break (0);
     43     return GNUNET_SYSERR;
     44   }
     45   /* likely not reverse proxy, figure out if we are
     46      http by asking MHD */
     47   ci = MHD_get_connection_info (connection,
     48                                 MHD_CONNECTION_INFO_DAEMON);
     49   if (NULL == ci)
     50   {
     51     GNUNET_break (0);
     52     return GNUNET_SYSERR;
     53   }
     54   di = MHD_get_daemon_info (ci->daemon,
     55                             MHD_DAEMON_INFO_FLAGS);
     56   if (NULL == di)
     57   {
     58     GNUNET_break (0);
     59     return GNUNET_SYSERR;
     60   }
     61   if (0 != (di->flags & MHD_USE_TLS))
     62     return GNUNET_YES;
     63   return GNUNET_NO;
     64 }
     65 
     66 
     67 bool
     68 TALER_MHD_arg_to_yna (struct MHD_Connection *connection,
     69                       const char *arg,
     70                       enum TALER_EXCHANGE_YesNoAll default_val,
     71                       enum TALER_EXCHANGE_YesNoAll *yna)
     72 {
     73   const char *str;
     74 
     75   str = MHD_lookup_connection_value (connection,
     76                                      MHD_GET_ARGUMENT_KIND,
     77                                      arg);
     78   if (NULL == str)
     79   {
     80     *yna = default_val;
     81     return true;
     82   }
     83   if (0 == strcasecmp (str, "yes"))
     84   {
     85     *yna = TALER_EXCHANGE_YNA_YES;
     86     return true;
     87   }
     88   if (0 == strcasecmp (str, "no"))
     89   {
     90     *yna = TALER_EXCHANGE_YNA_NO;
     91     return true;
     92   }
     93   if (0 == strcasecmp (str, "all"))
     94   {
     95     *yna = TALER_EXCHANGE_YNA_ALL;
     96     return true;
     97   }
     98   return false;
     99 }