Line data    Source code

       1             : /*
       2             :   This file is part of TALER
       3             :   Copyright (C) 2023 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_account.c
      19             :  * @brief Implementation of the DELETE /private/account/$H_WIRE request of the merchant's HTTP API
      20             :  * @author Christian Grothoff
      21             :  */
      22             : #include "platform.h"
      23             : #include <curl/curl.h>
      24             : #include <jansson.h>
      25             : #include <microhttpd.h> /* just for HTTP status codes */
      26             : #include <gnunet/gnunet_util_lib.h>
      27             : #include <gnunet/gnunet_curl_lib.h>
      28             : #include "taler_merchant_service.h"
      29             : #include "merchant_api_curl_defaults.h"
      30             : #include <taler/taler_json_lib.h>
      31             : #include <taler/taler_signatures.h>
      32             : 
      33             : 
      34             : /**
      35             :  * Handle for a DELETE /accounts/$ID operation.
      36             :  */
      37             : struct TALER_MERCHANT_AccountDeleteHandle
      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_AccountDeleteCallback 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 DELETE /accounts/$H_WIRE request.
      70             :  *
      71             :  * @param cls the `struct TALER_MERCHANT_AccountDeleteHandle`
      72             :  * @param response_code HTTP response code, 0 on error
      73             :  * @param response response body, NULL if not in JSON
      74             :  */
      75             : static void
      76           0 : handle_delete_account_finished (void *cls,
      77             :                                 long response_code,
      78             :                                 const void *response)
      79             : {
      80           0 :   struct TALER_MERCHANT_AccountDeleteHandle *adh = cls;
      81           0 :   const json_t *json = response;
      82           0 :   struct TALER_MERCHANT_AccountDeleteResponse adr = {
      83           0 :     .hr.http_status = (unsigned int) response_code,
      84             :     .hr.reply = json
      85             :   };
      86             : 
      87           0 :   adh->job = NULL;
      88           0 :   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
      89             :               "Got /accounts/$H_WIRE 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 :     adr.hr.ec = TALER_JSON_get_error_code (json);
      97           0 :     adr.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 :     break;
     102           0 :   default:
     103             :     /* unexpected response code */
     104           0 :     adr.hr.ec = TALER_JSON_get_error_code (json);
     105           0 :     adr.hr.hint = TALER_JSON_get_error_hint (json);
     106           0 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     107             :                 "Unexpected response code %u/%d for DELETE /account/ID\n",
     108             :                 (unsigned int) response_code,
     109             :                 (int) adr.hr.ec);
     110           0 :     break;
     111             :   }
     112           0 :   adh->cb (adh->cb_cls,
     113             :            &adr);
     114           0 :   TALER_MERCHANT_account_delete_cancel (adh);
     115           0 : }
     116             : 
     117             : 
     118             : struct TALER_MERCHANT_AccountDeleteHandle *
     119           0 : TALER_MERCHANT_account_delete (
     120             :   struct GNUNET_CURL_Context *ctx,
     121             :   const char *backend_url,
     122             :   const struct TALER_MerchantWireHashP *h_wire,
     123             :   TALER_MERCHANT_AccountDeleteCallback cb,
     124             :   void *cb_cls)
     125             : {
     126             :   struct TALER_MERCHANT_AccountDeleteHandle *adh;
     127             : 
     128           0 :   adh = GNUNET_new (struct TALER_MERCHANT_AccountDeleteHandle);
     129           0 :   adh->ctx = ctx;
     130           0 :   adh->cb = cb;
     131           0 :   adh->cb_cls = cb_cls;
     132             :   {
     133             :     char h_wire_str[sizeof (*h_wire) * 2];
     134             :     char *path;
     135             :     char *end;
     136             : 
     137           0 :     end = GNUNET_STRINGS_data_to_string (h_wire,
     138             :                                          sizeof (*h_wire),
     139             :                                          h_wire_str,
     140             :                                          sizeof (h_wire_str));
     141           0 :     *end = '\0';
     142           0 :     GNUNET_asprintf (&path,
     143             :                      "private/account/%s",
     144             :                      h_wire_str);
     145           0 :     adh->url = TALER_url_join (backend_url,
     146             :                                path,
     147             :                                NULL);
     148           0 :     GNUNET_free (path);
     149             :   }
     150           0 :   if (NULL == adh->url)
     151             :   {
     152           0 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     153             :                 "Could not construct request URL.\n");
     154           0 :     GNUNET_free (adh);
     155           0 :     return NULL;
     156             :   }
     157           0 :   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
     158             :               "Requesting URL '%s'\n",
     159             :               adh->url);
     160             :   {
     161             :     CURL *eh;
     162             : 
     163           0 :     eh = TALER_MERCHANT_curl_easy_get_ (adh->url);
     164           0 :     GNUNET_assert (CURLE_OK ==
     165             :                    curl_easy_setopt (eh,
     166             :                                      CURLOPT_CUSTOMREQUEST,
     167             :                                      MHD_HTTP_METHOD_DELETE));
     168           0 :     adh->job = GNUNET_CURL_job_add (ctx,
     169             :                                     eh,
     170             :                                     &handle_delete_account_finished,
     171             :                                     adh);
     172             :   }
     173           0 :   return adh;
     174             : }
     175             : 
     176             : 
     177             : void
     178           0 : TALER_MERCHANT_account_delete_cancel (
     179             :   struct TALER_MERCHANT_AccountDeleteHandle *adh)
     180             : {
     181           0 :   if (NULL != adh->job)
     182           0 :     GNUNET_CURL_job_cancel (adh->job);
     183           0 :   GNUNET_free (adh->url);
     184           0 :   GNUNET_free (adh);
     185           0 : }