exchange

exchange_api_post-management-extensions.c (7302B)

---

 /*
    This file is part of TALER
    Copyright (C) 2015-2026 Taler Systems SA
 
    TALER is free software; you can redistribute it and/or modify it under the
    terms of the GNU General Public License as published by the Free Software
    Foundation; either version 3, or (at your option) any later version.
 
    TALER is distributed in the hope that it will be useful, but WITHOUT ANY
    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
    A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License along with
    TALER; see the file COPYING.  If not, see
    <http://www.gnu.org/licenses/>
  */
 /**
  * @file lib/exchange_api_post-management-extensions.c
  * @brief functions to handle the settings for extensions (p2p and age restriction)
  * @author Özgür Kesim
  */
 #include "taler/platform.h"
 #include "taler/taler_json_lib.h"
 #include <gnunet/gnunet_curl_lib.h>
 #include "taler/taler_extensions.h"
 #include "taler/taler_exchange_service.h"
 #include "taler/taler-exchange/post-management-extensions.h"
 #include "exchange_api_curl_defaults.h"
 #include "taler/taler_signatures.h"
 #include "taler/taler_curl_lib.h"
 
 
 /**
  * @brief Handle for a POST /management/extensions request.
  */
 struct TALER_EXCHANGE_PostManagementExtensionsHandle
 {
 
   /**
    * The base URL for this request.
    */
   char *base_url;
 
   /**
    * The full URL for this request, set during _start.
    */
   char *url;
 
   /**
    * Minor context that holds body and headers.
    */
   struct TALER_CURL_PostContext post_ctx;
 
   /**
    * Handle for the request.
    */
   struct GNUNET_CURL_Job *job;
 
   /**
    * Function to call with the result.
    */
   TALER_EXCHANGE_PostManagementExtensionsCallback cb;
 
   /**
    * Closure for @a cb.
    */
   TALER_EXCHANGE_POST_MANAGEMENT_EXTENSIONS_RESULT_CLOSURE *cb_cls;
 
   /**
    * Reference to the execution context.
    */
   struct GNUNET_CURL_Context *ctx;
 
   /**
    * Extension configuration data (we hold a reference).
    */
   json_t *extensions;
 
   /**
    * Signature over the extension configuration.
    */
   struct TALER_MasterSignatureP extensions_sig;
 
 };
 
 
 /**
  * Function called when we're done processing the
  * HTTP POST /management/extensions request.
  *
  * @param cls the `struct TALER_EXCHANGE_PostManagementExtensionsHandle`
  * @param response_code HTTP response code, 0 on error
  * @param response response body, NULL if not in JSON
  */
 static void
 handle_post_extensions_finished (void *cls,
                                  long response_code,
                                  const void *response)
 {
   struct TALER_EXCHANGE_PostManagementExtensionsHandle *pmeh = cls;
   const json_t *json = response;
   struct TALER_EXCHANGE_PostManagementExtensionsResponse res = {
     .hr.http_status = (unsigned int) response_code,
     .hr.reply = json
   };
 
   pmeh->job = NULL;
   switch (response_code)
   {
   case MHD_HTTP_NO_CONTENT:
     break;
   case MHD_HTTP_FORBIDDEN:
     res.hr.ec = TALER_JSON_get_error_code (json);
     res.hr.hint = TALER_JSON_get_error_hint (json);
     break;
   case MHD_HTTP_NOT_FOUND:
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Server did not find handler at `%s'. Did you configure the correct exchange base URL?\n",
                 pmeh->url);
     if (NULL != json)
     {
       res.hr.ec = TALER_JSON_get_error_code (json);
       res.hr.hint = TALER_JSON_get_error_hint (json);
     }
     else
     {
       res.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
       res.hr.hint = TALER_ErrorCode_get_hint (res.hr.ec);
     }
     break;
   default:
     /* unexpected response code */
     GNUNET_break_op (0);
     res.hr.ec = TALER_JSON_get_error_code (json);
     res.hr.hint = TALER_JSON_get_error_hint (json);
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Unexpected response code %u/%d for exchange management post extensions\n",
                 (unsigned int) response_code,
                 (int) res.hr.ec);
     break;
   }
   if (NULL != pmeh->cb)
   {
     pmeh->cb (pmeh->cb_cls,
               &res);
     pmeh->cb = NULL;
   }
   TALER_EXCHANGE_post_management_extensions_cancel (pmeh);
 }
 
 
 struct TALER_EXCHANGE_PostManagementExtensionsHandle *
 TALER_EXCHANGE_post_management_extensions_create (
   struct GNUNET_CURL_Context *ctx,
   const char *url,
   const struct TALER_EXCHANGE_ManagementPostExtensionsData *ped)
 {
   struct TALER_EXCHANGE_PostManagementExtensionsHandle *pmeh;
 
   pmeh = GNUNET_new (struct TALER_EXCHANGE_PostManagementExtensionsHandle);
   pmeh->ctx = ctx;
   pmeh->base_url = GNUNET_strdup (url);
   pmeh->extensions = json_incref ((json_t *) ped->extensions);
   pmeh->extensions_sig = ped->extensions_sig;
   return pmeh;
 }
 
 
 enum TALER_ErrorCode
 TALER_EXCHANGE_post_management_extensions_start (
   struct TALER_EXCHANGE_PostManagementExtensionsHandle *pmeh,
   TALER_EXCHANGE_PostManagementExtensionsCallback cb,
   TALER_EXCHANGE_POST_MANAGEMENT_EXTENSIONS_RESULT_CLOSURE *cb_cls)
 {
   CURL *eh = NULL;
   json_t *body = NULL;
   json_t *extensions;
 
   pmeh->cb = cb;
   pmeh->cb_cls = cb_cls;
   pmeh->url = TALER_url_join (pmeh->base_url,
                               "management/extensions",
                               NULL);
   if (NULL == pmeh->url)
   {
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Could not construct request URL.\n");
     return TALER_EC_GENERIC_CONFIGURATION_INVALID;
   }
   /* Transfer our reference to the body via steal; set to NULL first */
   extensions = pmeh->extensions;
   pmeh->extensions = NULL;
   body = GNUNET_JSON_PACK (
     GNUNET_JSON_pack_object_steal ("extensions",
                                    extensions),
     GNUNET_JSON_pack_data_auto ("extensions_sig",
                                 &pmeh->extensions_sig));
   eh = TALER_EXCHANGE_curl_easy_get_ (pmeh->url);
   if ( (NULL == eh) ||
        (GNUNET_OK !=
         TALER_curl_easy_post (&pmeh->post_ctx,
                               eh,
                               body)) )
   {
     GNUNET_break (0);
     if (NULL != eh)
       curl_easy_cleanup (eh);
     json_decref (body);
     GNUNET_free (pmeh->url);
     pmeh->url = NULL;
     return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
   }
   json_decref (body);
   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
               "Requesting URL '%s'\n",
               pmeh->url);
   pmeh->job = GNUNET_CURL_job_add2 (pmeh->ctx,
                                     eh,
                                     pmeh->post_ctx.headers,
                                     &handle_post_extensions_finished,
                                     pmeh);
   if (NULL == pmeh->job)
   {
     TALER_curl_easy_post_finished (&pmeh->post_ctx);
     GNUNET_free (pmeh->url);
     pmeh->url = NULL;
     return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
   }
   return TALER_EC_NONE;
 }
 
 
 void
 TALER_EXCHANGE_post_management_extensions_cancel (
   struct TALER_EXCHANGE_PostManagementExtensionsHandle *pmeh)
 {
   if (NULL != pmeh->job)
   {
     GNUNET_CURL_job_cancel (pmeh->job);
     pmeh->job = NULL;
   }
   TALER_curl_easy_post_finished (&pmeh->post_ctx);
   if (NULL != pmeh->extensions)
   {
     json_decref (pmeh->extensions);
     pmeh->extensions = NULL;
   }
   GNUNET_free (pmeh->url);
   GNUNET_free (pmeh->base_url);
   GNUNET_free (pmeh);
 }
 
 
 /* end of exchange_api_post-management-extensions.c */