merchant

merchant_api_post_donau_instance.c (6239B)

---

 /*
   This file is part of TALER
   Copyright (C) 2024 Taler Systems SA
 
   TALER is free software; you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as
   published by the Free Software Foundation; either version 2.1,
   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 Lesser General Public License for more details.
 
   You should have received a copy of the GNU Lesser General
   Public License along with TALER; see the file COPYING.LGPL.
   If not, see <http://www.gnu.org/licenses/>
 */
 /**
  * @file merchant_api_post_donau_instance.c
  * @brief Implementation of the POST /donau request
  *        of the merchant's HTTP API
  * @author Bohdan Potuzhnyi
  * @author Vlada Svirsh
  */
 #include "platform.h"
 #include <curl/curl.h>
 #include <jansson.h>
 #include <microhttpd.h> /* just for HTTP status codes */
 #include <gnunet/gnunet_util_lib.h>
 #include "taler_merchant_service.h"
 #include "merchant_api_curl_defaults.h"
 #include "merchant_api_common.h"
 #include <taler/taler_json_lib.h>
 #include <taler/taler_signatures.h>
 #include <taler/taler_curl_lib.h>
 #include <taler/taler_kyclogic_lib.h>
 /* DONAU RELATED IMPORTS */
 #include "taler_merchant_donau.h"
 #include <donau/donau_service.h>
 
 
 /**
  * Handle for a POST /donau operation.
  */
 struct TALER_MERCHANT_DonauInstancePostHandle
 {
   /**
    * URL for this request.
    */
   char *url;
 
   /**
    * Handle for the CURL job.
    */
   struct GNUNET_CURL_Job *job;
 
   /**
    * Function to call with the result.
    */
   TALER_MERCHANT_DonauInstancePostCallback cb;
 
   /**
    * Closure for @a cb.
    */
   void *cb_cls;
 
   /**
    * Reference to the execution context.
    */
   struct GNUNET_CURL_Context *ctx;
 
   /**
    * Minor context that holds body and headers.
    */
   struct TALER_CURL_PostContext post_ctx;
 };
 
 
 /**
  * Function called when the POST /donau operation is finished.
  *
  * @param cls the `struct TALER_MERCHANT_DonauInstancePostHandle`
  * @param response_code HTTP response code, 0 on error
  * @param response response body, NULL if not in JSON
  */
 static void
 handle_post_donau_finished (void *cls,
                             long response_code,
                             const void *response)
 {
   struct TALER_MERCHANT_DonauInstancePostHandle *dph = cls;
   const json_t *json = response;
   struct TALER_MERCHANT_HttpResponse hr = {
     .http_status = (unsigned int) response_code,
     .reply = json
   };
 
   dph->job = NULL;
   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
               "POST /donau completed with response code %u\n",
               (unsigned int) response_code);
 
   switch (response_code)
   {
   case 0:
     hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
     break;
   case MHD_HTTP_NO_CONTENT:
     break;
   case MHD_HTTP_BAD_REQUEST:
   case MHD_HTTP_INTERNAL_SERVER_ERROR:
   default:
     TALER_MERCHANT_parse_error_details_ (json,
                                          response_code,
                                          &hr);
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Unexpected response code %u/%d\n",
                 (unsigned int) response_code,
                 (int) hr.ec);
     break;
   }
 
   dph->cb (dph->cb_cls,
            &hr);
   TALER_MERCHANT_donau_instances_post_cancel (dph);
 }
 
 
 struct TALER_MERCHANT_DonauInstancePostHandle *
 TALER_MERCHANT_donau_instances_post (
   struct GNUNET_CURL_Context *ctx,
   const char *backend_url,
   const struct TALER_MERCHANT_DONAU_Charity *charity,
   const char *auth_token,
   TALER_MERCHANT_DonauInstancePostCallback cb,
   void *cb_cls)
 {
   struct TALER_MERCHANT_DonauInstancePostHandle *dph;
   json_t *req_obj;
   json_t *auth_obj;
 
   if (NULL != auth_token)
   {
     if (0 != strncasecmp (RFC_8959_PREFIX,
                           auth_token,
                           strlen (RFC_8959_PREFIX)))
     {
       GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                   "Authentication token must start with `%s'\n",
                   RFC_8959_PREFIX);
       return NULL;
     }
     auth_obj = GNUNET_JSON_PACK (
       GNUNET_JSON_pack_string ("method",
                                "token"),
       GNUNET_JSON_pack_string ("token",
                                auth_token));
   }
   else
   {
     auth_obj = GNUNET_JSON_PACK (
       GNUNET_JSON_pack_string ("method",
                                "external"));
   }
   if (NULL == auth_obj)
   {
     GNUNET_break (0);
     return NULL;
   }
 
   req_obj = GNUNET_JSON_PACK (
     GNUNET_JSON_pack_string ("donau_url",
                              charity->charity_url),
     GNUNET_JSON_pack_uint64 ("charity_id",
                              charity->charity_id)
     );
 
   dph = GNUNET_new (struct TALER_MERCHANT_DonauInstancePostHandle);
   dph->ctx = ctx;
   dph->cb = cb;
   dph->cb_cls = cb_cls;
   dph->url = TALER_url_join (backend_url,
                              "private/donau",
                              NULL);
 
   if (NULL == dph->url)
   {
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Failed to construct request URL\n");
     json_decref (req_obj);
     GNUNET_free (dph);
     return NULL;
   }
   {
     CURL *eh;
 
     eh = TALER_MERCHANT_curl_easy_get_ (dph->url);
     if (GNUNET_OK != TALER_curl_easy_post (&dph->post_ctx,
                                            eh,
                                            req_obj))
     {
       GNUNET_break (0);
       curl_easy_cleanup (eh);
       json_decref (req_obj);
       GNUNET_free (dph);
       return NULL;
     }
 
     json_decref (req_obj);
 
     dph->job = GNUNET_CURL_job_add2 (ctx,
                                      eh,
                                      dph->post_ctx.headers,
                                      &handle_post_donau_finished,
                                      dph);
   }
   return dph;
 }
 
 
 void
 TALER_MERCHANT_donau_instances_post_cancel (
   struct TALER_MERCHANT_DonauInstancePostHandle *dph)
 {
   if (NULL != dph->job)
   {
     GNUNET_CURL_job_cancel (dph->job);
     dph->job = NULL;
   }
   TALER_curl_easy_post_finished (&dph->post_ctx);
   GNUNET_free (dph->url);
   GNUNET_free (dph);
 }
 
 
 /* end of merchant_api_post_donau_instance.c */