merchant

merchant_api_post_order_claim.c (6805B)

---

 /*
   This file is part of TALER
   Copyright (C) 2014-2023 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_claim.c
  * @brief Implementation of POST /orders/$ID/claim
  * @author Christian Grothoff
  * @author Marcello Stanisci
  */
 #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 <taler/taler_json_lib.h>
 #include <taler/taler_signatures.h>
 #include <taler/taler_curl_lib.h>
 
 
 /**
  * Structure representing a POST /orders/$ID/claim operation.
  */
 struct TALER_MERCHANT_OrderClaimHandle
 {
   /**
    * Full URL, includes "/orders/$ID/claim".
    */
   char *url;
 
   /**
    * Handle for the request.
    */
   struct GNUNET_CURL_Job *job;
 
   /**
    * Function to call with the result.
    */
   TALER_MERCHANT_OrderClaimCallback 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 we're done processing the
  * POST /orders/$ID/claim request.
  *
  * @param cls the `struct TALER_MERCHANT_OrderClaimHandle`
  * @param response_code HTTP response code, 0 on error
  * @param response response body, should be NULL
  */
 static void
 handle_post_order_claim_finished (void *cls,
                                   long response_code,
                                   const void *response)
 {
   struct TALER_MERCHANT_OrderClaimHandle *och = cls;
   const json_t *json = response;
   struct TALER_MERCHANT_OrderClaimResponse ocr = {
     .hr.http_status = (unsigned int) response_code,
     .hr.reply = json
   };
   struct GNUNET_JSON_Specification spec[] = {
     GNUNET_JSON_spec_object_const (
       "contract_terms",
       &ocr.details.ok.contract_terms),
     GNUNET_JSON_spec_fixed_auto (
       "sig",
       &ocr.details.ok.sig),
     GNUNET_JSON_spec_end ()
   };
 
   och->job = NULL;
   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
               "Order claimed with status %u\n",
               (unsigned int) response_code);
 
   if (MHD_HTTP_OK != response_code)
   {
     ocr.hr.ec = TALER_JSON_get_error_code (json);
     ocr.hr.hint = TALER_JSON_get_error_hint (json);
     GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                 "Proposal lookup failed with HTTP status code %u/%d\n",
                 (unsigned int) response_code,
                 (int) ocr.hr.ec);
     och->cb (och->cb_cls,
              &ocr);
     TALER_MERCHANT_order_claim_cancel (och);
     return;
   }
 
   if (GNUNET_OK !=
       GNUNET_JSON_parse (json,
                          spec,
                          NULL, NULL))
   {
     GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                 "Claiming order failed: could not parse JSON response\n");
     GNUNET_break_op (0);
     ocr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
     ocr.hr.http_status = 0;
     och->cb (och->cb_cls,
              &ocr);
     TALER_MERCHANT_order_claim_cancel (och);
     return;
   }
 
   if (GNUNET_OK !=
       TALER_JSON_contract_hash (ocr.details.ok.contract_terms,
                                 &ocr.details.ok.h_contract_terms))
   {
     GNUNET_break (0);
     ocr.hr.ec = TALER_EC_MERCHANT_POST_ORDERS_ID_CLAIM_CLIENT_INTERNAL_FAILURE;
     ocr.hr.http_status = 0;
     GNUNET_JSON_parse_free (spec);
     och->cb (och->cb_cls,
              &ocr);
     TALER_MERCHANT_order_claim_cancel (och);
     return;
   }
   och->cb (och->cb_cls,
            &ocr);
   GNUNET_JSON_parse_free (spec);
   TALER_MERCHANT_order_claim_cancel (och);
 }
 
 
 struct TALER_MERCHANT_OrderClaimHandle *
 TALER_MERCHANT_order_claim (struct GNUNET_CURL_Context *ctx,
                             const char *backend_url,
                             const char *order_id,
                             const struct GNUNET_CRYPTO_EddsaPublicKey *nonce,
                             const struct TALER_ClaimTokenP *claim_token,
                             TALER_MERCHANT_OrderClaimCallback cb,
                             void *cb_cls)
 {
   struct TALER_MERCHANT_OrderClaimHandle *och;
   json_t *req_obj;
 
   if (NULL == order_id)
   {
     GNUNET_break (0);
     return NULL;
   }
   req_obj = GNUNET_JSON_PACK (
     GNUNET_JSON_pack_data_auto ("nonce",
                                 nonce),
     GNUNET_JSON_pack_allow_null (
       GNUNET_JSON_pack_data_auto ("token",
                                   claim_token)));
   och = GNUNET_new (struct TALER_MERCHANT_OrderClaimHandle);
   och->ctx = ctx;
   och->cb = cb;
   och->cb_cls = cb_cls;
   {
     char *path;
 
     GNUNET_asprintf (&path,
                      "orders/%s/claim",
                      order_id);
     och->url = TALER_url_join (backend_url,
                                path,
                                NULL);
     GNUNET_free (path);
   }
   if (NULL == och->url)
   {
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Could not construct request URL.\n");
     json_decref (req_obj);
     GNUNET_free (och);
     return NULL;
   }
   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
               "Claiming order at %s\n",
               och->url);
   {
     CURL *eh;
 
     eh = TALER_MERCHANT_curl_easy_get_ (och->url);
     GNUNET_assert (GNUNET_OK ==
                    TALER_curl_easy_post (&och->post_ctx,
                                          eh,
                                          req_obj));
     json_decref (req_obj);
     och->job = GNUNET_CURL_job_add2 (ctx,
                                      eh,
                                      och->post_ctx.headers,
                                      &handle_post_order_claim_finished,
                                      och);
     GNUNET_assert (NULL != och->job);
   }
   return och;
 }
 
 
 void
 TALER_MERCHANT_order_claim_cancel (struct TALER_MERCHANT_OrderClaimHandle *och)
 {
   if (NULL != och->job)
   {
     GNUNET_CURL_job_cancel (och->job);
     och->job = NULL;
   }
   TALER_curl_easy_post_finished (&och->post_ctx);
   GNUNET_free (och->url);
   GNUNET_free (och);
 }
 
 
 /* end of merchant_api_post_order_claim.c */