exchange

Base system with REST service to issue digital coins, run by the payment service provider
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taler-auditor-httpd_spa.c (3078B)

      1 /*
      2   This file is part of TALER
      3   Copyright (C) 2020, 2023, 2024 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 EXCHANGEABILITY 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 taler-auditor-httpd_spa.c
     18  * @brief logic to load single page app (/spa)
     19  * @author Christian Grothoff
     20  */
     21 #include "platform.h"
     22 #include <gnunet/gnunet_util_lib.h>
     23 #include "taler/taler_util.h"
     24 #include "taler/taler_mhd_lib.h"
     25 #include <gnunet/gnunet_mhd_compat.h>
     26 #include "taler-auditor-httpd_spa.h"
     27 
     28 
     29 /**
     30  * Resources of the auditor SPA.
     31  */
     32 static struct TALER_MHD_Spa *spa;
     33 
     34 
     35 enum MHD_Result
     36 TAH_spa_handler (
     37   /* const */ struct TAH_RequestHandler *rh,
     38   struct MHD_Connection *connection,
     39   void **connection_cls,
     40   const char *upload_data,
     41   size_t *upload_data_size,
     42   const char *const args[])
     43 {
     44   const char *path = args[1];
     45 
     46   GNUNET_assert (0 == strcmp (args[0],
     47                               "spa"));
     48   if (NULL == path)
     49     path = "index.html";
     50   return TALER_MHD_spa_handler (spa,
     51                                 connection,
     52                                 path);
     53 }
     54 
     55 
     56 /**
     57  * Load the SPA data from an directory.
     58  *
     59  * If the directory is not found,
     60  * fall back to a directory owned by the taler-exchange package.
     61  *
     62  * @param spa_abs_dir absolute location of the SPA,
     63  *        typically packaged separately from the exchange
     64  * @param spa_fallback_dir fallback directory, relative
     65  *        to the project data.
     66  * @returns loaded SPA or NULL on error
     67  */
     68 static struct TALER_MHD_Spa *
     69 spa_load (const char *spa_abs_dir,
     70           const char *spa_fallback_dir)
     71 {
     72   bool have_spa = false;
     73   GNUNET_assert (NULL != spa_fallback_dir);
     74   if (NULL != spa_abs_dir)
     75   {
     76     struct stat sb;
     77     have_spa = stat (spa_abs_dir, &sb) == 0 && S_ISDIR (sb.st_mode);
     78     if (have_spa)
     79     {
     80       return TALER_MHD_spa_load_dir (spa_abs_dir);
     81     }
     82     GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
     83                 "SPA not found at '%s', using fallback\n",
     84                 spa_abs_dir);
     85   }
     86   return TALER_MHD_spa_load (TALER_AUDITOR_project_data (),
     87                              spa_fallback_dir);
     88 }
     89 
     90 
     91 enum GNUNET_GenericReturnValue
     92 TAH_spa_init ()
     93 {
     94   spa = spa_load (TAH_spa_dir,
     95                   "spa/");
     96   if (NULL == spa)
     97   {
     98     GNUNET_break (0);
     99     return GNUNET_SYSERR;
    100   }
    101   return GNUNET_OK;
    102 }
    103 
    104 
    105 /**
    106  * Nicely shut down.
    107  */
    108 void __attribute__ ((destructor))
    109 get_spa_fini (void);
    110 
    111 /* declaration to suppress compiler warning */
    112 void __attribute__ ((destructor))
    113 get_spa_fini ()
    114 {
    115   if (NULL != spa)
    116   {
    117     TALER_MHD_spa_free (spa);
    118     spa = NULL;
    119   }
    120 }