Line data    Source code

       1             : /*
       2             :   This file is part of TALER
       3             :   Copyright (C) 2021 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_transfer.c
      19             :  * @brief Implementation of the DELETE /transfer/$ID request of the merchant's HTTP API
      20             :  * @author Christian Grothoff
      21             :  */
      22             : #include "platform.h"
      23             : #include <curl/curl.h>
      24             : #include <jansson.h>
      25             : #include <microhttpd.h> /* just for HTTP status codes */
      26             : #include <gnunet/gnunet_util_lib.h>
      27             : #include <gnunet/gnunet_curl_lib.h>
      28             : #include "taler_merchant_service.h"
      29             : #include "merchant_api_curl_defaults.h"
      30             : #include <taler/taler_json_lib.h>
      31             : #include <taler/taler_signatures.h>
      32             : 
      33             : 
      34             : /**
      35             :  * Handle for a DELETE /transfers/$ID operation.
      36             :  */
      37             : struct TALER_MERCHANT_TransferDeleteHandle
      38             : {
      39             :   /**
      40             :    * The url for this request.
      41             :    */
      42             :   char *url;
      43             : 
      44             :   /**
      45             :    * Handle for the request.
      46             :    */
      47             :   struct GNUNET_CURL_Job *job;
      48             : 
      49             :   /**
      50             :    * Function to call with the result.
      51             :    */
      52             :   TALER_MERCHANT_TransferDeleteCallback cb;
      53             : 
      54             :   /**
      55             :    * Closure for @a cb.
      56             :    */
      57             :   void *cb_cls;
      58             : 
      59             :   /**
      60             :    * Reference to the execution context.
      61             :    */
      62             :   struct GNUNET_CURL_Context *ctx;
      63             : 
      64             : };
      65             : 
      66             : 
      67             : /**
      68             :  * Function called when we're done processing the
      69             :  * HTTP GET /transfers/$ID request.
      70             :  *
      71             :  * @param cls the `struct TALER_MERCHANT_TransferDeleteHandle`
      72             :  * @param response_code HTTP response code, 0 on error
      73             :  * @param response response body, NULL if not in JSON
      74             :  */
      75             : static void
      76           0 : handle_delete_transfer_finished (void *cls,
      77             :                                  long response_code,
      78             :                                  const void *response)
      79             : {
      80           0 :   struct TALER_MERCHANT_TransferDeleteHandle *tdh = cls;
      81           0 :   const json_t *json = response;
      82           0 :   struct TALER_MERCHANT_HttpResponse hr = {
      83           0 :     .http_status = (unsigned int) response_code,
      84             :     .reply = json
      85             :   };
      86             : 
      87           0 :   tdh->job = NULL;
      88           0 :   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
      89             :               "Got /transfers/$ID response with status code %u\n",
      90             :               (unsigned int) response_code);
      91           0 :   switch (response_code)
      92             :   {
      93           0 :   case MHD_HTTP_NO_CONTENT:
      94           0 :     break;
      95           0 :   case MHD_HTTP_UNAUTHORIZED:
      96           0 :     hr.ec = TALER_JSON_get_error_code (json);
      97           0 :     hr.hint = TALER_JSON_get_error_hint (json);
      98             :     /* Nothing really to verify, merchant says we need to authenticate. */
      99           0 :     break;
     100           0 :   case MHD_HTTP_NOT_FOUND:
     101           0 :     hr.ec = TALER_JSON_get_error_code (json);
     102           0 :     hr.hint = TALER_JSON_get_error_hint (json);
     103           0 :     break;
     104           0 :   case MHD_HTTP_CONFLICT:
     105           0 :     hr.ec = TALER_JSON_get_error_code (json);
     106           0 :     hr.hint = TALER_JSON_get_error_hint (json);
     107           0 :     break;
     108           0 :   default:
     109             :     /* unexpected response code */
     110           0 :     hr.ec = TALER_JSON_get_error_code (json);
     111           0 :     hr.hint = TALER_JSON_get_error_hint (json);
     112           0 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     113             :                 "Unexpected response code %u/%d\n",
     114             :                 (unsigned int) response_code,
     115             :                 (int) hr.ec);
     116           0 :     break;
     117             :   }
     118           0 :   tdh->cb (tdh->cb_cls,
     119             :            &hr);
     120           0 :   TALER_MERCHANT_transfer_delete_cancel (tdh);
     121           0 : }
     122             : 
     123             : 
     124             : struct TALER_MERCHANT_TransferDeleteHandle *
     125           0 : TALER_MERCHANT_transfer_delete (
     126             :   struct GNUNET_CURL_Context *ctx,
     127             :   const char *backend_url,
     128             :   uint64_t wire_transfer_serial,
     129             :   TALER_MERCHANT_TransferDeleteCallback cb,
     130             :   void *cb_cls)
     131             : {
     132             :   struct TALER_MERCHANT_TransferDeleteHandle *tdh;
     133             : 
     134           0 :   tdh = GNUNET_new (struct TALER_MERCHANT_TransferDeleteHandle);
     135           0 :   tdh->ctx = ctx;
     136           0 :   tdh->cb = cb;
     137           0 :   tdh->cb_cls = cb_cls;
     138             :   {
     139             :     char *path;
     140             : 
     141           0 :     GNUNET_asprintf (&path,
     142             :                      "private/transfers/%llu",
     143             :                      (unsigned long long) wire_transfer_serial);
     144           0 :     tdh->url = TALER_url_join (backend_url,
     145             :                                path,
     146             :                                NULL);
     147           0 :     GNUNET_free (path);
     148             :   }
     149           0 :   if (NULL == tdh->url)
     150             :   {
     151           0 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     152             :                 "Could not construct request URL.\n");
     153           0 :     GNUNET_free (tdh);
     154           0 :     return NULL;
     155             :   }
     156           0 :   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
     157             :               "Requesting URL '%s'\n",
     158             :               tdh->url);
     159             :   {
     160             :     CURL *eh;
     161             : 
     162           0 :     eh = TALER_MERCHANT_curl_easy_get_ (tdh->url);
     163           0 :     GNUNET_assert (CURLE_OK ==
     164             :                    curl_easy_setopt (eh,
     165             :                                      CURLOPT_CUSTOMREQUEST,
     166             :                                      MHD_HTTP_METHOD_DELETE));
     167           0 :     tdh->job = GNUNET_CURL_job_add (ctx,
     168             :                                     eh,
     169             :                                     &handle_delete_transfer_finished,
     170             :                                     tdh);
     171             :   }
     172           0 :   return tdh;
     173             : }
     174             : 
     175             : 
     176             : void
     177           0 : TALER_MERCHANT_transfer_delete_cancel (
     178             :   struct TALER_MERCHANT_TransferDeleteHandle *tdh)
     179             : {
     180           0 :   if (NULL != tdh->job)
     181           0 :     GNUNET_CURL_job_cancel (tdh->job);
     182           0 :   GNUNET_free (tdh->url);
     183           0 :   GNUNET_free (tdh);
     184           0 : }