Line data    Source code

       1             : /*
       2             :   This file is part of TALER
       3             :   Copyright (C) 2020-2022 Taler Systems SA
       4             : 
       5             :   TALER is free software; you can redistribute it and/or modify it under the
       6             :   terms of the GNU Lesser General Public License as published by the Free Software
       7             :   Foundation; either version 2.1, 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 Lesser General Public License for more details.
      12             : 
      13             :   You should have received a copy of the GNU Lesser General Public License along with
      14             :   TALER; see the file COPYING.LGPL.  If not, see
      15             :   <http://www.gnu.org/licenses/>
      16             : */
      17             : /**
      18             :  * @file merchant_api_delete_order.c
      19             :  * @brief Implementation of the DELETE /orders/$ORDER_ID request of the merchant's HTTP API
      20             :  * @author Jonathan Buchanan
      21             :  */
      22             : #include "platform.h"
      23             : #include <curl/curl.h>
      24             : #include <jansson.h>
      25             : #include <microhttpd.h> /* just for HTTP status codes */
      26             : #include <gnunet/gnunet_util_lib.h>
      27             : #include <gnunet/gnunet_curl_lib.h>
      28             : #include "taler_merchant_service.h"
      29             : #include "merchant_api_curl_defaults.h"
      30             : #include <taler/taler_json_lib.h>
      31             : #include <taler/taler_signatures.h>
      32             : 
      33             : /**
      34             :  * Handle for a DELETE /orders/$ID operation.
      35             :  */
      36             : struct TALER_MERCHANT_OrderDeleteHandle
      37             : {
      38             :   /**
      39             :    * The url for this request.
      40             :    */
      41             :   char *url;
      42             : 
      43             :   /**
      44             :    * Handle for the request.
      45             :    */
      46             :   struct GNUNET_CURL_Job *job;
      47             : 
      48             :   /**
      49             :    * Function to call with the result.
      50             :    */
      51             :   TALER_MERCHANT_OrderDeleteCallback cb;
      52             : 
      53             :   /**
      54             :    * Closure for @a cb.
      55             :    */
      56             :   void *cb_cls;
      57             : 
      58             :   /**
      59             :    * Reference to the execution context.
      60             :    */
      61             :   struct GNUNET_CURL_Context *ctx;
      62             : };
      63             : 
      64             : 
      65             : /**
      66             :  * Function called when we're done processing the
      67             :  * HTTP DELETE /orders/$ORDER_ID request.
      68             :  *
      69             :  * @param cls the `struct TALER_MERCHANT_OrderDeleteHandle`
      70             :  * @param response_code HTTP response code, 0 on error
      71             :  * @param response response body, NULL if not in JSON
      72             :  */
      73             : static void
      74           6 : handle_delete_order_finished (void *cls,
      75             :                               long response_code,
      76             :                               const void *response)
      77             : {
      78           6 :   struct TALER_MERCHANT_OrderDeleteHandle *odh = cls;
      79           6 :   struct TALER_MERCHANT_HttpResponse hr = {
      80           6 :     .http_status = (unsigned int) response_code,
      81             :     .reply = NULL,
      82             :   };
      83             : 
      84           6 :   odh->job = NULL;
      85           6 :   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
      86             :               "Got /orders/$ID response with status code %u\n",
      87             :               (unsigned int) response_code);
      88           6 :   switch (response_code)
      89             :   {
      90           2 :   case MHD_HTTP_NO_CONTENT:
      91           2 :     break;
      92           0 :   case MHD_HTTP_UNAUTHORIZED:
      93           0 :     hr.ec = TALER_JSON_get_error_code (response);
      94           0 :     hr.hint = TALER_JSON_get_error_hint (response);
      95             :     /* Nothing really to verify, merchant says we need to authenticate. */
      96           0 :     break;
      97           2 :   case MHD_HTTP_NOT_FOUND:
      98           2 :     break;
      99           2 :   case MHD_HTTP_CONFLICT:
     100           2 :     break;
     101           0 :   default:
     102             :     /* unexpected response code */
     103           0 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     104             :                 "Unexpected response code %u\n",
     105             :                 (unsigned int) response_code);
     106           0 :     break;
     107             :   }
     108           6 :   odh->cb (odh->cb_cls,
     109             :            &hr);
     110           6 :   TALER_MERCHANT_order_delete_cancel (odh);
     111           6 : }
     112             : 
     113             : 
     114             : struct TALER_MERCHANT_OrderDeleteHandle *
     115           6 : TALER_MERCHANT_order_delete (
     116             :   struct GNUNET_CURL_Context *ctx,
     117             :   const char *backend_url,
     118             :   const char *order_id,
     119             :   bool force,
     120             :   TALER_MERCHANT_OrderDeleteCallback cb,
     121             :   void *cb_cls)
     122             : {
     123             :   struct TALER_MERCHANT_OrderDeleteHandle *odh;
     124             : 
     125           6 :   odh = GNUNET_new (struct TALER_MERCHANT_OrderDeleteHandle);
     126           6 :   odh->ctx = ctx;
     127           6 :   odh->cb = cb;
     128           6 :   odh->cb_cls = cb_cls;
     129             :   {
     130             :     char *path;
     131             : 
     132           6 :     GNUNET_asprintf (&path,
     133             :                      "private/orders/%s%s",
     134             :                      order_id,
     135             :                      force
     136             :                      ? "?force=yes"
     137             :                      : "");
     138             : 
     139           6 :     odh->url = TALER_url_join (backend_url,
     140             :                                path,
     141             :                                NULL);
     142           6 :     GNUNET_free (path);
     143             :   }
     144           6 :   if (NULL == odh->url)
     145             :   {
     146           0 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     147             :                 "Could not construct request url.\n");
     148           0 :     GNUNET_free (odh);
     149           0 :     return NULL;
     150             :   }
     151             : 
     152             :   {
     153             :     CURL *eh;
     154             : 
     155           6 :     eh = TALER_MERCHANT_curl_easy_get_ (odh->url);
     156           6 :     GNUNET_assert (CURLE_OK ==
     157             :                    curl_easy_setopt (eh,
     158             :                                      CURLOPT_CUSTOMREQUEST,
     159             :                                      MHD_HTTP_METHOD_DELETE));
     160           6 :     odh->job = GNUNET_CURL_job_add (ctx,
     161             :                                     eh,
     162             :                                     &handle_delete_order_finished,
     163             :                                     odh);
     164             :   }
     165           6 :   return odh;
     166             : }
     167             : 
     168             : 
     169             : void
     170           6 : TALER_MERCHANT_order_delete_cancel (
     171             :   struct TALER_MERCHANT_OrderDeleteHandle *odh)
     172             : {
     173           6 :   if (NULL != odh->job)
     174           0 :     GNUNET_CURL_job_cancel (odh->job);
     175           6 :   GNUNET_free (odh->url);
     176           6 :   GNUNET_free (odh);
     177           6 : }