exchange

Base system with REST service to issue digital coins, run by the payment service provider
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mhd.c (2862B)

      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/platform.h"
     22 #include "taler/taler_util.h"
     23 #include "taler/taler_mhd_lib.h"
     24 
     25 
     26 enum GNUNET_GenericReturnValue
     27 TALER_mhd_is_https (struct MHD_Connection *connection)
     28 {
     29   const union MHD_ConnectionInfo *ci;
     30   const union MHD_DaemonInfo *di;
     31   const char *forwarded_proto = MHD_lookup_connection_value (connection,
     32                                                              MHD_HEADER_KIND,
     33                                                              "X-Forwarded-Proto");
     34 
     35   if (NULL != forwarded_proto)
     36   {
     37     if (0 == strcasecmp (forwarded_proto,
     38                          "https"))
     39       return GNUNET_YES;
     40     if (0 == strcasecmp (forwarded_proto,
     41                          "http"))
     42       return GNUNET_NO;
     43     GNUNET_break (0);
     44     return GNUNET_SYSERR;
     45   }
     46   /* likely not reverse proxy, figure out if we are
     47      http by asking MHD */
     48   ci = MHD_get_connection_info (connection,
     49                                 MHD_CONNECTION_INFO_DAEMON);
     50   if (NULL == ci)
     51   {
     52     GNUNET_break (0);
     53     return GNUNET_SYSERR;
     54   }
     55   di = MHD_get_daemon_info (ci->daemon,
     56                             MHD_DAEMON_INFO_FLAGS);
     57   if (NULL == di)
     58   {
     59     GNUNET_break (0);
     60     return GNUNET_SYSERR;
     61   }
     62   if (0 != (di->flags & MHD_USE_TLS))
     63     return GNUNET_YES;
     64   return GNUNET_NO;
     65 }
     66 
     67 
     68 bool
     69 TALER_MHD_arg_to_yna (struct MHD_Connection *connection,
     70                       const char *arg,
     71                       enum TALER_EXCHANGE_YesNoAll default_val,
     72                       enum TALER_EXCHANGE_YesNoAll *yna)
     73 {
     74   const char *str;
     75 
     76   str = MHD_lookup_connection_value (connection,
     77                                      MHD_GET_ARGUMENT_KIND,
     78                                      arg);
     79   if (NULL == str)
     80   {
     81     *yna = default_val;
     82     return true;
     83   }
     84   if (0 == strcasecmp (str, "yes"))
     85   {
     86     *yna = TALER_EXCHANGE_YNA_YES;
     87     return true;
     88   }
     89   if (0 == strcasecmp (str, "no"))
     90   {
     91     *yna = TALER_EXCHANGE_YNA_NO;
     92     return true;
     93   }
     94   if (0 == strcasecmp (str, "all"))
     95   {
     96     *yna = TALER_EXCHANGE_YNA_ALL;
     97     return true;
     98   }
     99   return false;
    100 }