merchant

merchant_api_get_instance.c (6939B)

---

 /*
   This file is part of TALER
   Copyright (C) 2014-2023 Taler Systems SA
 
   TALER is free software; you can redistribute it and/or modify it under the
   terms of the GNU Lesser General Public License as published by the Free Software
   Foundation; either version 2.1, or (at your option) any later version.
 
   TALER is distributed in the hope that it will be useful, but WITHOUT ANY
   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
   A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
 
   You should have received a copy of the GNU Lesser General Public License along with
   TALER; see the file COPYING.LGPL.  If not, see
   <http://www.gnu.org/licenses/>
 */
 /**
  * @file merchant_api_get_instance.c
  * @brief Implementation of the GET /instance/$ID request of the merchant's HTTP API
  * @author Christian Grothoff
  */
 #include "platform.h"
 #include <curl/curl.h>
 #include <jansson.h>
 #include <microhttpd.h> /* just for HTTP status codes */
 #include <gnunet/gnunet_util_lib.h>
 #include <gnunet/gnunet_curl_lib.h>
 #include "taler_merchant_service.h"
 #include "merchant_api_curl_defaults.h"
 #include <taler/taler_json_lib.h>
 #include <taler/taler_kyclogic_lib.h>
 #include <taler/taler_signatures.h>
 
 
 /**
  * Handle for a GET /instances/$ID operation.
  */
 struct TALER_MERCHANT_InstanceGetHandle
 {
   /**
    * The url for this request.
    */
   char *url;
 
   /**
    * Handle for the request.
    */
   struct GNUNET_CURL_Job *job;
 
   /**
    * Function to call with the result.
    */
   TALER_MERCHANT_InstanceGetCallback cb;
 
   /**
    * Closure for @a cb.
    */
   void *cb_cls;
 
   /**
    * Reference to the execution context.
    */
   struct GNUNET_CURL_Context *ctx;
 
 };
 
 
 /**
  * Function called when we're done processing the
  * HTTP GET /instances/$ID request.
  *
  * @param cls the `struct TALER_MERCHANT_InstanceGetHandle`
  * @param response_code HTTP response code, 0 on error
  * @param response response body, NULL if not in JSON
  */
 static void
 handle_get_instance_finished (void *cls,
                               long response_code,
                               const void *response)
 {
   struct TALER_MERCHANT_InstanceGetHandle *igh = cls;
   const json_t *json = response;
   struct TALER_MERCHANT_InstanceGetResponse igr = {
     .hr.http_status = (unsigned int) response_code,
     .hr.reply = json
   };
 
   igh->job = NULL;
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "Got /instances/$ID response with status code %u\n",
               (unsigned int) response_code);
   switch (response_code)
   {
   case MHD_HTTP_OK:
     {
       const json_t *address;
       const json_t *jurisdiction;
       struct GNUNET_JSON_Specification spec[] = {
         GNUNET_JSON_spec_string (
           "name",
           &igr.details.ok.details.name),
         GNUNET_JSON_spec_fixed_auto (
           "merchant_pub",
           &igr.details.ok.details.merchant_pub),
         GNUNET_JSON_spec_object_const (
           "address",
           &address),
         GNUNET_JSON_spec_object_const (
           "jurisdiction",
           &jurisdiction),
         GNUNET_JSON_spec_bool (
           "use_stefan",
           &igr.details.ok.details.use_stefan),
         GNUNET_JSON_spec_relative_time (
           "default_wire_transfer_delay",
           &igr.details.ok.details.default_wire_transfer_delay),
         GNUNET_JSON_spec_relative_time (
           "default_pay_delay",
           &igr.details.ok.details.default_pay_delay),
         GNUNET_JSON_spec_mark_optional (
           GNUNET_JSON_spec_relative_time (
             "default_refund_delay",
             &igr.details.ok.details.default_refund_delay),
           NULL),
         GNUNET_JSON_spec_mark_optional (
           GNUNET_JSON_spec_time_rounder_interval (
             "default_wire_transfer_rounding_interval",
             &igr.details.ok.details.default_wire_transfer_rounding_interval),
           NULL),
         GNUNET_JSON_spec_end ()
       };
 
       if (GNUNET_OK !=
           GNUNET_JSON_parse (json,
                              spec,
                              NULL, NULL))
       {
         GNUNET_break_op (0);
         igr.hr.http_status = 0;
         igr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
         break;
       }
       igr.details.ok.details.address = address;
       igr.details.ok.details.jurisdiction = jurisdiction;
       igh->cb (igh->cb_cls,
                &igr);
       TALER_MERCHANT_instance_get_cancel (igh);
       return;
     }
   case MHD_HTTP_UNAUTHORIZED:
     igr.hr.ec = TALER_JSON_get_error_code (json);
     igr.hr.hint = TALER_JSON_get_error_hint (json);
     /* Nothing really to verify, merchant says we need to authenticate. */
     break;
   case MHD_HTTP_NOT_FOUND:
     /* instance does not exist */
     igr.hr.ec = TALER_JSON_get_error_code (json);
     igr.hr.hint = TALER_JSON_get_error_hint (json);
     break;
   default:
     /* unexpected response code */
     igr.hr.ec = TALER_JSON_get_error_code (json);
     igr.hr.hint = TALER_JSON_get_error_hint (json);
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Unexpected response code %u/%d\n",
                 (unsigned int) response_code,
                 (int) igr.hr.ec);
     break;
   }
   igh->cb (igh->cb_cls,
            &igr);
   TALER_MERCHANT_instance_get_cancel (igh);
 }
 
 
 struct TALER_MERCHANT_InstanceGetHandle *
 TALER_MERCHANT_instance_get (struct GNUNET_CURL_Context *ctx,
                              const char *backend_url,
                              const char *instance_id,
                              TALER_MERCHANT_InstanceGetCallback cb,
                              void *cb_cls)
 {
   struct TALER_MERCHANT_InstanceGetHandle *igh;
   CURL *eh;
 
   igh = GNUNET_new (struct TALER_MERCHANT_InstanceGetHandle);
   igh->ctx = ctx;
   igh->cb = cb;
   igh->cb_cls = cb_cls;
   if (NULL != instance_id)
   {
     char *path;
 
     GNUNET_asprintf (&path,
                      "instances/%s/private",
                      instance_id);
     igh->url = TALER_url_join (backend_url,
                                path,
                                NULL);
     GNUNET_free (path);
   }
   else
   {
     igh->url = TALER_url_join (backend_url,
                                "private",
                                NULL);
   }
   if (NULL == igh->url)
   {
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Could not construct request URL.\n");
     GNUNET_free (igh);
     return NULL;
   }
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "Requesting URL '%s'\n",
               igh->url);
   eh = TALER_MERCHANT_curl_easy_get_ (igh->url);
   igh->job = GNUNET_CURL_job_add (ctx,
                                   eh,
                                   &handle_get_instance_finished,
                                   igh);
   return igh;
 }
 
 
 void
 TALER_MERCHANT_instance_get_cancel (
   struct TALER_MERCHANT_InstanceGetHandle *igh)
 {
   if (NULL != igh->job)
     GNUNET_CURL_job_cancel (igh->job);
   GNUNET_free (igh->url);
   GNUNET_free (igh);
 }