Line data    Source code

       1             : /*
       2             :   This file is part of TALER
       3             :   Copyright (C) 2025 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_instance_token.c
      19             :  * @brief Implementation of the DELETE /instance/$ID/private/token request of the merchant's HTTP API
      20             :  * @author Martin Schanzenbach
      21             :  */
      22             : #include "platform.h"
      23             : #include <curl/curl.h>
      24             : #include <jansson.h>
      25             : #include <microhttpd.h> /* just for HTTP status codes */
      26             : #include <gnunet/gnunet_util_lib.h>
      27             : #include <gnunet/gnunet_curl_lib.h>
      28             : #include "taler_merchant_service.h"
      29             : #include "merchant_api_curl_defaults.h"
      30             : #include <taler/taler_json_lib.h>
      31             : #include <taler/taler_signatures.h>
      32             : 
      33             : 
      34             : /**
      35             :  * Handle for a DELETE /instance/$ID/private/token operation.
      36             :  */
      37             : struct TALER_MERCHANT_InstanceTokenDeleteHandle
      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_InstanceTokenDeleteCallback 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 /instance/$ID/private/token request.
      70             :  *
      71             :  * @param cls the `struct TALER_MERCHANT_TokenDeleteHandle`
      72             :  * @param response_code HTTP response code, 0 on error
      73             :  * @param response response body, NULL if not in JSON
      74             :  */
      75             : static void
      76           2 : handle_delete_token_finished (void *cls,
      77             :                               long response_code,
      78             :                               const void *response)
      79             : {
      80           2 :   struct TALER_MERCHANT_InstanceTokenDeleteHandle *tdh = cls;
      81           2 :   const json_t *json = response;
      82           2 :   struct TALER_MERCHANT_HttpResponse tdr = {
      83           2 :     .http_status = (unsigned int) response_code,
      84             :     .reply = json
      85             :   };
      86             : 
      87           2 :   tdh->job = NULL;
      88           2 :   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
      89             :               "Got /instances/$ID/private/token response with status code %u\n",
      90             :               (unsigned int) response_code);
      91           2 :   switch (response_code)
      92             :   {
      93           2 :   case MHD_HTTP_NO_CONTENT:
      94           2 :     break;
      95           0 :   case MHD_HTTP_UNAUTHORIZED:
      96           0 :     tdr.ec = TALER_JSON_get_error_code (json);
      97           0 :     tdr.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 :     tdr.ec = TALER_JSON_get_error_code (json);
     105           0 :     tdr.hint = TALER_JSON_get_error_hint (json);
     106           0 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     107             :                 "Unexpected response code %u/%d for DELETE /instance/$ID/private/token\n",
     108             :                 (unsigned int) response_code,
     109             :                 (int) tdr.ec);
     110           0 :     break;
     111             :   }
     112           2 :   tdh->cb (tdh->cb_cls,
     113             :            &tdr);
     114           2 :   TALER_MERCHANT_instance_token_delete_cancel (tdh);
     115           2 : }
     116             : 
     117             : 
     118             : struct TALER_MERCHANT_InstanceTokenDeleteHandle *
     119           2 : TALER_MERCHANT_instance_token_delete (
     120             :   struct GNUNET_CURL_Context *ctx,
     121             :   const char *backend_url,
     122             :   const char *instance_id,
     123             :   TALER_MERCHANT_InstanceTokenDeleteCallback cb,
     124             :   void *cb_cls)
     125             : {
     126             :   struct TALER_MERCHANT_InstanceTokenDeleteHandle *tdh;
     127             : 
     128           2 :   tdh = GNUNET_new (struct TALER_MERCHANT_InstanceTokenDeleteHandle);
     129           2 :   tdh->ctx = ctx;
     130           2 :   tdh->cb = cb;
     131           2 :   tdh->cb_cls = cb_cls;
     132             :   {
     133             :     char *path;
     134             : 
     135           2 :     GNUNET_asprintf (&path,
     136             :                      "instances/%s/private/token",
     137             :                      instance_id);
     138           2 :     tdh->url = TALER_url_join (backend_url,
     139             :                                path,
     140             :                                NULL);
     141           2 :     GNUNET_free (path);
     142             :   }
     143           2 :   if (NULL == tdh->url)
     144             :   {
     145           0 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     146             :                 "Could not construct request URL.\n");
     147           0 :     GNUNET_free (tdh);
     148           0 :     return NULL;
     149             :   }
     150           2 :   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
     151             :               "Requesting URL '%s'\n",
     152             :               tdh->url);
     153             :   {
     154             :     CURL *eh;
     155             : 
     156           2 :     eh = TALER_MERCHANT_curl_easy_get_ (tdh->url);
     157           2 :     GNUNET_assert (CURLE_OK ==
     158             :                    curl_easy_setopt (eh,
     159             :                                      CURLOPT_CUSTOMREQUEST,
     160             :                                      MHD_HTTP_METHOD_DELETE));
     161           2 :     tdh->job = GNUNET_CURL_job_add (ctx,
     162             :                                     eh,
     163             :                                     &handle_delete_token_finished,
     164             :                                     tdh);
     165             :   }
     166           2 :   return tdh;
     167             : }
     168             : 
     169             : 
     170             : void
     171           2 : TALER_MERCHANT_instance_token_delete_cancel (
     172             :   struct TALER_MERCHANT_InstanceTokenDeleteHandle *tdh)
     173             : {
     174           2 :   if (NULL != tdh->job)
     175           0 :     GNUNET_CURL_job_cancel (tdh->job);
     176           2 :   GNUNET_free (tdh->url);
     177           2 :   GNUNET_free (tdh);
     178           2 : }