Line data    Source code

       1             : /*
       2             :    This file is part of TALER
       3             :    Copyright (C) 2015-2023 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
      15             :    <http://www.gnu.org/licenses/>
      16             :  */
      17             : /**
      18             :  * @file lib/exchange_api_management_post_extensions.c
      19             :  * @brief functions to handle the settings for extensions (p2p and age restriction)
      20             :  * @author Özgür Kesim
      21             :  */
      22             : #include "taler/platform.h"
      23             : #include "taler/taler_json_lib.h"
      24             : #include <gnunet/gnunet_curl_lib.h>
      25             : #include "taler/taler_extensions.h"
      26             : #include "exchange_api_curl_defaults.h"
      27             : #include "taler/taler_exchange_service.h"
      28             : #include "taler/taler_signatures.h"
      29             : #include "taler/taler_curl_lib.h"
      30             : #include "taler/taler_json_lib.h"
      31             : 
      32             : 
      33             : /**
      34             :  * @brief Handle for a POST /management/extensions request.
      35             :  */
      36             : struct TALER_EXCHANGE_ManagementPostExtensionsHandle
      37             : {
      38             : 
      39             :   /**
      40             :    * The url for this request.
      41             :    */
      42             :   char *url;
      43             : 
      44             :   /**
      45             :    * Minor context that holds body and headers.
      46             :    */
      47             :   struct TALER_CURL_PostContext post_ctx;
      48             : 
      49             :   /**
      50             :    * Handle for the request.
      51             :    */
      52             :   struct GNUNET_CURL_Job *job;
      53             : 
      54             :   /**
      55             :    * Function to call with the result.
      56             :    */
      57             :   TALER_EXCHANGE_ManagementPostExtensionsCallback cb;
      58             : 
      59             :   /**
      60             :    * Closure for @a cb.
      61             :    */
      62             :   void *cb_cls;
      63             : 
      64             :   /**
      65             :    * Reference to the execution context.
      66             :    */
      67             :   struct GNUNET_CURL_Context *ctx;
      68             : };
      69             : 
      70             : 
      71             : /**
      72             :  * Function called when we're done processing the
      73             :  * HTTP POST /management/extensions request.
      74             :  *
      75             :  * @param cls the `struct TALER_EXCHANGE_ManagementPostExtensionsHandle *`
      76             :  * @param response_code HTTP response code, 0 on error
      77             :  * @param response response body, NULL if not in JSON
      78             :  */
      79             : static void
      80           0 : handle_post_extensions_finished (void *cls,
      81             :                                  long response_code,
      82             :                                  const void *response)
      83             : {
      84           0 :   struct TALER_EXCHANGE_ManagementPostExtensionsHandle *ph = cls;
      85           0 :   const json_t *json = response;
      86           0 :   struct TALER_EXCHANGE_ManagementPostExtensionsResponse per = {
      87           0 :     .hr.http_status = (unsigned int) response_code,
      88             :     .hr.reply = json
      89             :   };
      90             : 
      91           0 :   ph->job = NULL;
      92           0 :   switch (response_code)
      93             :   {
      94           0 :   case MHD_HTTP_NO_CONTENT:
      95           0 :     break;
      96           0 :   case MHD_HTTP_FORBIDDEN:
      97           0 :     per.hr.ec = TALER_JSON_get_error_code (json);
      98           0 :     per.hr.hint = TALER_JSON_get_error_hint (json);
      99           0 :     break;
     100           0 :   case MHD_HTTP_NOT_FOUND:
     101           0 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     102             :                 "Server did not find handler at `%s'. Did you configure the correct exchange base URL?\n",
     103             :                 ph->url);
     104           0 :     if (NULL != json)
     105             :     {
     106           0 :       per.hr.ec = TALER_JSON_get_error_code (json);
     107           0 :       per.hr.hint = TALER_JSON_get_error_hint (json);
     108             :     }
     109             :     else
     110             :     {
     111           0 :       per.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
     112           0 :       per.hr.hint = TALER_ErrorCode_get_hint (per.hr.ec);
     113             :     }
     114           0 :     break;
     115           0 :   default:
     116             :     /* unexpected response code */
     117           0 :     GNUNET_break_op (0);
     118           0 :     per.hr.ec = TALER_JSON_get_error_code (json);
     119           0 :     per.hr.hint = TALER_JSON_get_error_hint (json);
     120           0 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     121             :                 "Unexpected response code %u/%d for exchange management post extensions\n",
     122             :                 (unsigned int) response_code,
     123             :                 (int) per.hr.ec);
     124           0 :     break;
     125             :   }
     126           0 :   if (NULL != ph->cb)
     127             :   {
     128           0 :     ph->cb (ph->cb_cls,
     129             :             &per);
     130           0 :     ph->cb = NULL;
     131             :   }
     132           0 :   TALER_EXCHANGE_management_post_extensions_cancel (ph);
     133           0 : }
     134             : 
     135             : 
     136             : struct TALER_EXCHANGE_ManagementPostExtensionsHandle *
     137           0 : TALER_EXCHANGE_management_post_extensions (
     138             :   struct GNUNET_CURL_Context *ctx,
     139             :   const char *url,
     140             :   const struct TALER_EXCHANGE_ManagementPostExtensionsData *ped,
     141             :   TALER_EXCHANGE_ManagementPostExtensionsCallback cb,
     142             :   void *cb_cls)
     143             : {
     144             :   struct TALER_EXCHANGE_ManagementPostExtensionsHandle *ph;
     145           0 :   CURL *eh = NULL;
     146           0 :   json_t *body = NULL;
     147             : 
     148           0 :   ph = GNUNET_new (struct TALER_EXCHANGE_ManagementPostExtensionsHandle);
     149           0 :   ph->cb = cb;
     150           0 :   ph->cb_cls = cb_cls;
     151           0 :   ph->ctx = ctx;
     152           0 :   ph->url = TALER_url_join (url,
     153             :                             "management/extensions",
     154             :                             NULL);
     155           0 :   if (NULL == ph->url)
     156             :   {
     157           0 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     158             :                 "Could not construct request URL.\n");
     159           0 :     GNUNET_free (ph);
     160           0 :     return NULL;
     161             :   }
     162             : 
     163           0 :   body = GNUNET_JSON_PACK (
     164             :     GNUNET_JSON_pack_object_steal ("extensions",
     165             :                                    (json_t *) ped->extensions),
     166             :     GNUNET_JSON_pack_data_auto ("extensions_sig",
     167             :                                 &ped->extensions_sig));
     168             : 
     169           0 :   eh = TALER_EXCHANGE_curl_easy_get_ (ph->url);
     170           0 :   if ( (NULL == eh) ||
     171             :        (GNUNET_OK !=
     172           0 :         TALER_curl_easy_post (&ph->post_ctx,
     173             :                               eh,
     174             :                               body)) )
     175             :   {
     176           0 :     GNUNET_break (0);
     177           0 :     if (NULL != eh)
     178           0 :       curl_easy_cleanup (eh);
     179           0 :     json_decref (body);
     180           0 :     GNUNET_free (ph->url);
     181           0 :     return NULL;
     182             :   }
     183           0 :   json_decref (body);
     184           0 :   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
     185             :               "Requesting URL '%s'\n",
     186             :               ph->url);
     187           0 :   ph->job = GNUNET_CURL_job_add2 (ctx,
     188             :                                   eh,
     189           0 :                                   ph->post_ctx.headers,
     190             :                                   &handle_post_extensions_finished,
     191             :                                   ph);
     192           0 :   if (NULL == ph->job)
     193             :   {
     194           0 :     TALER_EXCHANGE_management_post_extensions_cancel (ph);
     195           0 :     return NULL;
     196             :   }
     197           0 :   return ph;
     198             : }
     199             : 
     200             : 
     201             : void
     202           0 : TALER_EXCHANGE_management_post_extensions_cancel (
     203             :   struct TALER_EXCHANGE_ManagementPostExtensionsHandle *ph)
     204             : {
     205           0 :   if (NULL != ph->job)
     206             :   {
     207           0 :     GNUNET_CURL_job_cancel (ph->job);
     208           0 :     ph->job = NULL;
     209             :   }
     210           0 :   TALER_curl_easy_post_finished (&ph->post_ctx);
     211           0 :   GNUNET_free (ph->url);
     212           0 :   GNUNET_free (ph);
     213           0 : }