merchant

merchant_api_post_order_paid.c (7751B)

---

 /*
   This file is part of TALER
   Copyright (C) 2020-2021 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_order_paid.c
  * @brief Implementation of the POST /order/$ID/paid request
  *        of the merchant's HTTP API
  * @author Jonathan Buchanan
  */
 #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 <gnunet/gnunet_curl_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_exchange_service.h>
 #include <taler/taler_curl_lib.h>
 
 
 /**
  * @brief Handle to a POST /orders/$ID/paid operation at a merchant.
  */
 struct TALER_MERCHANT_OrderPaidHandle
 {
 
   /**
    * The url for this request.
    */
   char *url;
 
   /**
    * Handle for the request.
    */
   struct GNUNET_CURL_Job *job;
 
   /**
    * Function to call with the result.
    */
   TALER_MERCHANT_OrderPaidCallback paid_cb;
 
   /**
    * Closure for @a paid_cb.
    */
   void *paid_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 we're done processing the
  * HTTP /paid request.
  *
  * @param cls the `struct TALER_MERCHANT_OrderPaidHandle`
  * @param response_code HTTP response code, 0 on error
  * @param response response body, NULL if not in JSON
  */
 static void
 handle_paid_finished (void *cls,
                       long response_code,
                       const void *response)
 {
   struct TALER_MERCHANT_OrderPaidHandle *oph = cls;
   const json_t *json = response;
   struct TALER_MERCHANT_OrderPaidResponse opr = {
     .hr.http_status = (unsigned int) response_code,
     .hr.reply = json
   };
 
   oph->job = NULL;
   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
               "/paid completed with response code %u\n",
               (unsigned int) response_code);
   switch (response_code)
   {
   case 0:
     opr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
     break;
   case MHD_HTTP_OK:
     {
       bool refunded;
       struct GNUNET_JSON_Specification spec[] = {
         GNUNET_JSON_spec_bool ("refunded",
                                &refunded),
         GNUNET_JSON_spec_end ()
       };
 
       if (GNUNET_OK !=
           GNUNET_JSON_parse (opr.hr.reply,
                              spec,
                              NULL,
                              NULL))
       {
         GNUNET_break_op (0);
         opr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
         break;
       }
       break;
     }
     break;
   case MHD_HTTP_BAD_REQUEST:
     opr.hr.ec = TALER_JSON_get_error_code (json);
     opr.hr.hint = TALER_JSON_get_error_hint (json);
     /* This should never happen, either us
      * or the merchant is buggy (or API version conflict);
      * just pass JSON reply to the application */
     break;
   case MHD_HTTP_FORBIDDEN:
     opr.hr.ec = TALER_JSON_get_error_code (json);
     opr.hr.hint = TALER_JSON_get_error_hint (json);
     /* The signature provided was invalid */
     break;
   case MHD_HTTP_NOT_FOUND:
     opr.hr.ec = TALER_JSON_get_error_code (json);
     opr.hr.hint = TALER_JSON_get_error_hint (json);
     /* Nothing really to verify, this should never
        happen, we should pass the JSON reply to the
        application */
     break;
   case MHD_HTTP_CONFLICT:
     opr.hr.ec = TALER_JSON_get_error_code (json);
     opr.hr.hint = TALER_JSON_get_error_hint (json);
     /* The hashed contract terms don't match with the order_id. */
     break;
   case MHD_HTTP_INTERNAL_SERVER_ERROR:
     opr.hr.ec = TALER_JSON_get_error_code (json);
     opr.hr.hint = TALER_JSON_get_error_hint (json);
     /* Server had an internal issue; we should retry,
        but this API leaves this to the application */
     break;
   case MHD_HTTP_SERVICE_UNAVAILABLE:
     TALER_MERCHANT_parse_error_details_ (json,
                                          response_code,
                                          &opr.hr);
     /* Exchange couldn't respond properly; the retry is
        left to the application */
     break;
   default:
     TALER_MERCHANT_parse_error_details_ (json,
                                          response_code,
                                          &opr.hr);
     /* unexpected response code */
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Unexpected response code %u/%d\n",
                 (unsigned int) response_code,
                 (int) opr.hr.ec);
     GNUNET_break_op (0);
     break;
   }
   oph->paid_cb (oph->paid_cb_cls,
                 &opr);
   TALER_MERCHANT_order_paid_cancel (oph);
 }
 
 
 struct TALER_MERCHANT_OrderPaidHandle *
 TALER_MERCHANT_order_paid (
   struct GNUNET_CURL_Context *ctx,
   const char *merchant_url,
   const char *order_id,
   const char *session_id,
   const struct TALER_PrivateContractHashP *h_contract_terms,
   const struct GNUNET_HashCode *wallet_data_hash,
   const struct TALER_MerchantSignatureP *merchant_sig,
   TALER_MERCHANT_OrderPaidCallback paid_cb,
   void *paid_cb_cls)
 {
   struct TALER_MERCHANT_OrderPaidHandle *oph;
   json_t *req_obj;
 
   (void) wallet_data_hash;
   req_obj = GNUNET_JSON_PACK (
     GNUNET_JSON_pack_data_auto ("sig",
                                 merchant_sig),
     GNUNET_JSON_pack_data_auto ("h_contract",
                                 h_contract_terms),
     GNUNET_JSON_pack_string ("session_id",
                              session_id));
   oph = GNUNET_new (struct TALER_MERCHANT_OrderPaidHandle);
   oph->ctx = ctx;
   oph->paid_cb = paid_cb;
   oph->paid_cb_cls = paid_cb_cls;
   {
     char *path;
 
     GNUNET_asprintf (&path,
                      "orders/%s/paid",
                      order_id);
     oph->url = TALER_url_join (merchant_url,
                                path,
                                NULL);
     GNUNET_free (path);
   }
   if (NULL == oph->url)
   {
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Could not construct request URL.\n");
     json_decref (req_obj);
     GNUNET_free (oph);
     return NULL;
   }
   {
     CURL *eh;
 
     eh = TALER_MERCHANT_curl_easy_get_ (oph->url);
     if (GNUNET_OK !=
         TALER_curl_easy_post (&oph->post_ctx,
                               eh,
                               req_obj))
     {
       GNUNET_break (0);
       curl_easy_cleanup (eh);
       json_decref (req_obj);
       GNUNET_free (oph);
       return NULL;
     }
     json_decref (req_obj);
     oph->job = GNUNET_CURL_job_add2 (ctx,
                                      eh,
                                      oph->post_ctx.headers,
                                      &handle_paid_finished,
                                      oph);
   }
   return oph;
 }
 
 
 void
 TALER_MERCHANT_order_paid_cancel (
   struct TALER_MERCHANT_OrderPaidHandle *oph)
 {
   if (NULL != oph->job)
   {
     GNUNET_CURL_job_cancel (oph->job);
     oph->job = NULL;
   }
   TALER_curl_easy_post_finished (&oph->post_ctx);
   GNUNET_free (oph->url);
   GNUNET_free (oph);
 }
 
 
 /* end of merchant_api_post_order_paid.c */