LCOV - code coverage report
Current view: top level - lib - merchant_api_get-private-units.c (source / functions) Coverage Total Hit
Test: coverage.info Lines: 0.0 % 98 0
Test Date: 2026-04-12 12:58:13 Functions: 0.0 % 6 0

            Line data    Source code
       1              : /*
       2              :   This file is part of TALER
       3              :   Copyright (C) 2025-2026 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_get-private-units.c
      19              :  * @brief Implementation of the GET /private/units request
      20              :  * @author Christian Grothoff
      21              :  */
      22              : #include "taler/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/get-private-units.h>
      29              : #include "merchant_api_curl_defaults.h"
      30              : #include <taler/taler_json_lib.h>
      31              : 
      32              : 
      33              : /**
      34              :  * Maximum number of units returned in a single response.
      35              :  */
      36              : #define MAX_UNITS 1024
      37              : 
      38              : 
      39              : /**
      40              :  * Handle for a GET /private/units operation.
      41              :  */
      42              : struct TALER_MERCHANT_GetPrivateUnitsHandle
      43              : {
      44              :   /**
      45              :    * Base URL of the merchant backend.
      46              :    */
      47              :   char *base_url;
      48              : 
      49              :   /**
      50              :    * The full URL for this request.
      51              :    */
      52              :   char *url;
      53              : 
      54              :   /**
      55              :    * Handle for the request.
      56              :    */
      57              :   struct GNUNET_CURL_Job *job;
      58              : 
      59              :   /**
      60              :    * Function to call with the result.
      61              :    */
      62              :   TALER_MERCHANT_GetPrivateUnitsCallback cb;
      63              : 
      64              :   /**
      65              :    * Closure for @a cb.
      66              :    */
      67              :   TALER_MERCHANT_GET_PRIVATE_UNITS_RESULT_CLOSURE *cb_cls;
      68              : 
      69              :   /**
      70              :    * Reference to the execution context.
      71              :    */
      72              :   struct GNUNET_CURL_Context *ctx;
      73              : };
      74              : 
      75              : 
      76              : /**
      77              :  * Parse an individual unit entry from @a value.
      78              :  *
      79              :  * @param value JSON object describing the unit
      80              :  * @param[out] ue set to the parsed values
      81              :  * @return #GNUNET_OK on success
      82              :  */
      83              : static enum GNUNET_GenericReturnValue
      84            0 : parse_unit_entry (const json_t *value,
      85              :                   struct TALER_MERCHANT_UnitEntry *ue)
      86              : {
      87              :   struct GNUNET_JSON_Specification spec[] = {
      88            0 :     GNUNET_JSON_spec_string ("unit",
      89              :                              &ue->unit),
      90            0 :     GNUNET_JSON_spec_string ("unit_name_long",
      91              :                              &ue->unit_name_long),
      92            0 :     GNUNET_JSON_spec_string ("unit_name_short",
      93              :                              &ue->unit_name_short),
      94            0 :     GNUNET_JSON_spec_mark_optional (
      95              :       GNUNET_JSON_spec_object_const ("unit_name_long_i18n",
      96              :                                      &ue->unit_name_long_i18n),
      97              :       NULL),
      98            0 :     GNUNET_JSON_spec_mark_optional (
      99              :       GNUNET_JSON_spec_object_const ("unit_name_short_i18n",
     100              :                                      &ue->unit_name_short_i18n),
     101              :       NULL),
     102            0 :     GNUNET_JSON_spec_bool ("unit_allow_fraction",
     103              :                            &ue->unit_allow_fraction),
     104            0 :     GNUNET_JSON_spec_uint32 ("unit_precision_level",
     105              :                              &ue->unit_precision_level),
     106            0 :     GNUNET_JSON_spec_bool ("unit_active",
     107              :                            &ue->unit_active),
     108            0 :     GNUNET_JSON_spec_bool ("unit_builtin",
     109              :                            &ue->unit_builtin),
     110            0 :     GNUNET_JSON_spec_uint64 ("unit_serial",
     111              :                              &ue->unit_serial),
     112            0 :     GNUNET_JSON_spec_end ()
     113              :   };
     114              : 
     115            0 :   memset (ue,
     116              :           0,
     117              :           sizeof (*ue));
     118            0 :   if (GNUNET_OK !=
     119            0 :       GNUNET_JSON_parse (value,
     120              :                          spec,
     121              :                          NULL,
     122              :                          NULL))
     123              :   {
     124            0 :     GNUNET_break_op (0);
     125            0 :     return GNUNET_SYSERR;
     126              :   }
     127            0 :   return GNUNET_OK;
     128              : }
     129              : 
     130              : 
     131              : /**
     132              :  * Parse the list of units from @a units and call the callback.
     133              :  *
     134              :  * @param json complete response JSON
     135              :  * @param units array of units
     136              :  * @param gpuh ongoing operation handle
     137              :  * @return #GNUNET_OK on success
     138              :  */
     139              : static enum GNUNET_GenericReturnValue
     140            0 : parse_units (const json_t *json,
     141              :              const json_t *units,
     142              :              struct TALER_MERCHANT_GetPrivateUnitsHandle *gpuh)
     143              : {
     144            0 :   size_t len = json_array_size (units);
     145              : 
     146            0 :   if (len > MAX_UNITS)
     147              :   {
     148            0 :     GNUNET_break_op (0);
     149            0 :     return GNUNET_SYSERR;
     150              :   }
     151              : 
     152            0 :   {
     153            0 :     struct TALER_MERCHANT_UnitEntry entries[GNUNET_NZL (len)];
     154              :     size_t idx;
     155              :     json_t *value;
     156              : 
     157            0 :     json_array_foreach (units, idx, value) {
     158            0 :       if (GNUNET_OK !=
     159            0 :           parse_unit_entry (value,
     160              :                             &entries[idx]))
     161              :       {
     162            0 :         GNUNET_break_op (0);
     163            0 :         return GNUNET_SYSERR;
     164              :       }
     165              :     }
     166              :     {
     167            0 :       struct TALER_MERCHANT_GetPrivateUnitsResponse ugr = {
     168              :         .hr.http_status = MHD_HTTP_OK,
     169              :         .hr.reply = json,
     170              :         .details.ok.units = entries,
     171            0 :         .details.ok.units_length = (unsigned int) len
     172              :       };
     173              : 
     174            0 :       gpuh->cb (gpuh->cb_cls,
     175              :                 &ugr);
     176              :     }
     177              :   }
     178            0 :   return GNUNET_OK;
     179              : }
     180              : 
     181              : 
     182              : /**
     183              :  * Function called when we're done processing the
     184              :  * HTTP GET /private/units request.
     185              :  *
     186              :  * @param cls the `struct TALER_MERCHANT_GetPrivateUnitsHandle`
     187              :  * @param response_code HTTP response code, 0 on error
     188              :  * @param response response body, NULL if not in JSON
     189              :  */
     190              : static void
     191            0 : handle_get_units_finished (void *cls,
     192              :                            long response_code,
     193              :                            const void *response)
     194              : {
     195            0 :   struct TALER_MERCHANT_GetPrivateUnitsHandle *gpuh = cls;
     196            0 :   const json_t *json = response;
     197            0 :   struct TALER_MERCHANT_GetPrivateUnitsResponse ugr = {
     198            0 :     .hr.http_status = (unsigned int) response_code,
     199              :     .hr.reply = json
     200              :   };
     201              : 
     202            0 :   gpuh->job = NULL;
     203            0 :   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
     204              :               "Got /private/units response with status code %u\n",
     205              :               (unsigned int) response_code);
     206            0 :   switch (response_code)
     207              :   {
     208            0 :   case MHD_HTTP_OK:
     209              :     {
     210              :       const json_t *units;
     211              :       struct GNUNET_JSON_Specification spec[] = {
     212            0 :         GNUNET_JSON_spec_array_const ("units",
     213              :                                       &units),
     214            0 :         GNUNET_JSON_spec_end ()
     215              :       };
     216              : 
     217            0 :       if (GNUNET_OK !=
     218            0 :           GNUNET_JSON_parse (json,
     219              :                              spec,
     220              :                              NULL, NULL))
     221              :       {
     222            0 :         GNUNET_break_op (0);
     223            0 :         ugr.hr.http_status = 0;
     224            0 :         ugr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
     225            0 :         break;
     226              :       }
     227            0 :       if (GNUNET_OK ==
     228            0 :           parse_units (json,
     229              :                        units,
     230              :                        gpuh))
     231              :       {
     232            0 :         TALER_MERCHANT_get_private_units_cancel (gpuh);
     233            0 :         return;
     234              :       }
     235            0 :       ugr.hr.http_status = 0;
     236            0 :       ugr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
     237            0 :       break;
     238              :     }
     239            0 :   case MHD_HTTP_UNAUTHORIZED:
     240              :   case MHD_HTTP_FORBIDDEN:
     241              :   case MHD_HTTP_NOT_FOUND:
     242              :   case MHD_HTTP_CONFLICT:
     243            0 :     ugr.hr.ec = TALER_JSON_get_error_code (json);
     244            0 :     ugr.hr.hint = TALER_JSON_get_error_hint (json);
     245            0 :     break;
     246            0 :   case 0:
     247            0 :     ugr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
     248            0 :     break;
     249            0 :   default:
     250            0 :     ugr.hr.ec = TALER_JSON_get_error_code (json);
     251            0 :     ugr.hr.hint = TALER_JSON_get_error_hint (json);
     252            0 :     GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
     253              :                 "Unexpected response code %u/%d for GET /private/units\n",
     254              :                 (unsigned int) response_code,
     255              :                 (int) ugr.hr.ec);
     256            0 :     break;
     257              :   }
     258            0 :   gpuh->cb (gpuh->cb_cls,
     259              :             &ugr);
     260            0 :   TALER_MERCHANT_get_private_units_cancel (gpuh);
     261              : }
     262              : 
     263              : 
     264              : struct TALER_MERCHANT_GetPrivateUnitsHandle *
     265            0 : TALER_MERCHANT_get_private_units_create (
     266              :   struct GNUNET_CURL_Context *ctx,
     267              :   const char *url)
     268              : {
     269              :   struct TALER_MERCHANT_GetPrivateUnitsHandle *gpuh;
     270              : 
     271            0 :   gpuh = GNUNET_new (struct TALER_MERCHANT_GetPrivateUnitsHandle);
     272            0 :   gpuh->ctx = ctx;
     273            0 :   gpuh->base_url = GNUNET_strdup (url);
     274            0 :   return gpuh;
     275              : }
     276              : 
     277              : 
     278              : enum TALER_ErrorCode
     279            0 : TALER_MERCHANT_get_private_units_start (
     280              :   struct TALER_MERCHANT_GetPrivateUnitsHandle *gpuh,
     281              :   TALER_MERCHANT_GetPrivateUnitsCallback cb,
     282              :   TALER_MERCHANT_GET_PRIVATE_UNITS_RESULT_CLOSURE *cb_cls)
     283              : {
     284              :   CURL *eh;
     285              : 
     286            0 :   gpuh->cb = cb;
     287            0 :   gpuh->cb_cls = cb_cls;
     288            0 :   gpuh->url = TALER_url_join (gpuh->base_url,
     289              :                               "private/units",
     290              :                               NULL);
     291            0 :   if (NULL == gpuh->url)
     292            0 :     return TALER_EC_GENERIC_CONFIGURATION_INVALID;
     293            0 :   eh = TALER_MERCHANT_curl_easy_get_ (gpuh->url);
     294            0 :   if (NULL == eh)
     295            0 :     return TALER_EC_GENERIC_CONFIGURATION_INVALID;
     296            0 :   gpuh->job = GNUNET_CURL_job_add (gpuh->ctx,
     297              :                                    eh,
     298              :                                    &handle_get_units_finished,
     299              :                                    gpuh);
     300            0 :   if (NULL == gpuh->job)
     301            0 :     return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
     302            0 :   return TALER_EC_NONE;
     303              : }
     304              : 
     305              : 
     306              : void
     307            0 : TALER_MERCHANT_get_private_units_cancel (
     308              :   struct TALER_MERCHANT_GetPrivateUnitsHandle *gpuh)
     309              : {
     310            0 :   if (NULL != gpuh->job)
     311              :   {
     312            0 :     GNUNET_CURL_job_cancel (gpuh->job);
     313            0 :     gpuh->job = NULL;
     314              :   }
     315            0 :   GNUNET_free (gpuh->url);
     316            0 :   GNUNET_free (gpuh->base_url);
     317            0 :   GNUNET_free (gpuh);
     318            0 : }
     319              : 
     320              : 
     321              : /* end of merchant_api_get-private-units.c */
        

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