merchant

merchant_api_get-private-webhooks-WEBHOOK_ID.c (6702B)

---

 /*
   This file is part of TALER
   Copyright (C) 2022-2026 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-private-webhooks-WEBHOOK_ID-new.c
  * @brief Implementation of the GET /private/webhooks/$WEBHOOK_ID request
  * @author Priscilla Huang
  * @author Christian Grothoff
  */
 #include "taler/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/taler-merchant/get-private-webhooks-WEBHOOK_ID.h>
 #include "merchant_api_curl_defaults.h"
 #include <taler/taler_json_lib.h>
 
 
 /**
  * Handle for a GET /private/webhooks/$WEBHOOK_ID operation.
  */
 struct TALER_MERCHANT_GetPrivateWebhookHandle
 {
   /**
    * Base URL of the merchant backend.
    */
   char *base_url;
 
   /**
    * The full URL for this request.
    */
   char *url;
 
   /**
    * Handle for the request.
    */
   struct GNUNET_CURL_Job *job;
 
   /**
    * Function to call with the result.
    */
   TALER_MERCHANT_GetPrivateWebhookCallback cb;
 
   /**
    * Closure for @a cb.
    */
   TALER_MERCHANT_GET_PRIVATE_WEBHOOK_RESULT_CLOSURE *cb_cls;
 
   /**
    * Reference to the execution context.
    */
   struct GNUNET_CURL_Context *ctx;
 
   /**
    * Webhook identifier.
    */
   char *webhook_id;
 };
 
 
 /**
  * Function called when we're done processing the
  * HTTP GET /private/webhooks/$WEBHOOK_ID request.
  *
  * @param cls the `struct TALER_MERCHANT_GetPrivateWebhookHandle`
  * @param response_code HTTP response code, 0 on error
  * @param response response body, NULL if not in JSON
  */
 static void
 handle_get_webhook_finished (void *cls,
                              long response_code,
                              const void *response)
 {
   struct TALER_MERCHANT_GetPrivateWebhookHandle *gpw = cls;
   const json_t *json = response;
   struct TALER_MERCHANT_GetPrivateWebhookResponse wgr = {
     .hr.http_status = (unsigned int) response_code,
     .hr.reply = json
   };
 
   gpw->job = NULL;
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "Got /private/webhooks/$WEBHOOK_ID response with status code %u\n",
               (unsigned int) response_code);
   switch (response_code)
   {
   case MHD_HTTP_OK:
     {
       struct GNUNET_JSON_Specification spec[] = {
         GNUNET_JSON_spec_string ("event_type",
                                  &wgr.details.ok.event_type),
         TALER_JSON_spec_web_url ("url",
                                  &wgr.details.ok.url),
         GNUNET_JSON_spec_string ("http_method",
                                  &wgr.details.ok.http_method),
         GNUNET_JSON_spec_mark_optional (
           GNUNET_JSON_spec_string ("header_template",
                                    &wgr.details.ok.header_template),
           NULL),
         GNUNET_JSON_spec_mark_optional (
           GNUNET_JSON_spec_string ("body_template",
                                    &wgr.details.ok.body_template),
           NULL),
         GNUNET_JSON_spec_end ()
       };
 
       if (GNUNET_OK ==
           GNUNET_JSON_parse (json,
                              spec,
                              NULL, NULL))
       {
         gpw->cb (gpw->cb_cls,
                  &wgr);
         GNUNET_JSON_parse_free (spec);
         TALER_MERCHANT_get_private_webhook_cancel (gpw);
         return;
       }
       wgr.hr.http_status = 0;
       wgr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
       GNUNET_JSON_parse_free (spec);
       break;
     }
   case MHD_HTTP_UNAUTHORIZED:
     wgr.hr.ec = TALER_JSON_get_error_code (json);
     wgr.hr.hint = TALER_JSON_get_error_hint (json);
     /* Nothing really to verify, merchant says we need to authenticate. */
     break;
   case MHD_HTTP_NOT_FOUND:
     wgr.hr.ec = TALER_JSON_get_error_code (json);
     wgr.hr.hint = TALER_JSON_get_error_hint (json);
     break;
   default:
     /* unexpected response code */
     wgr.hr.ec = TALER_JSON_get_error_code (json);
     wgr.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) wgr.hr.ec);
     break;
   }
   gpw->cb (gpw->cb_cls,
            &wgr);
   TALER_MERCHANT_get_private_webhook_cancel (gpw);
 }
 
 
 struct TALER_MERCHANT_GetPrivateWebhookHandle *
 TALER_MERCHANT_get_private_webhook_create (
   struct GNUNET_CURL_Context *ctx,
   const char *url,
   const char *webhook_id)
 {
   struct TALER_MERCHANT_GetPrivateWebhookHandle *gpw;
 
   gpw = GNUNET_new (struct TALER_MERCHANT_GetPrivateWebhookHandle);
   gpw->ctx = ctx;
   gpw->base_url = GNUNET_strdup (url);
   gpw->webhook_id = GNUNET_strdup (webhook_id);
   return gpw;
 }
 
 
 enum TALER_ErrorCode
 TALER_MERCHANT_get_private_webhook_start (
   struct TALER_MERCHANT_GetPrivateWebhookHandle *gpw,
   TALER_MERCHANT_GetPrivateWebhookCallback cb,
   TALER_MERCHANT_GET_PRIVATE_WEBHOOK_RESULT_CLOSURE *cb_cls)
 {
   CURL *eh;
 
   gpw->cb = cb;
   gpw->cb_cls = cb_cls;
   {
     char *path;
 
     GNUNET_asprintf (&path,
                      "private/webhooks/%s",
                      gpw->webhook_id);
     gpw->url = TALER_url_join (gpw->base_url,
                                path,
                                NULL);
     GNUNET_free (path);
   }
   if (NULL == gpw->url)
     return TALER_EC_GENERIC_CONFIGURATION_INVALID;
   eh = TALER_MERCHANT_curl_easy_get_ (gpw->url);
   if (NULL == eh)
     return TALER_EC_GENERIC_CONFIGURATION_INVALID;
   gpw->job = GNUNET_CURL_job_add (gpw->ctx,
                                   eh,
                                   &handle_get_webhook_finished,
                                   gpw);
   if (NULL == gpw->job)
     return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
   return TALER_EC_NONE;
 }
 
 
 void
 TALER_MERCHANT_get_private_webhook_cancel (
   struct TALER_MERCHANT_GetPrivateWebhookHandle *gpw)
 {
   if (NULL != gpw->job)
   {
     GNUNET_CURL_job_cancel (gpw->job);
     gpw->job = NULL;
   }
   GNUNET_free (gpw->url);
   GNUNET_free (gpw->base_url);
   GNUNET_free (gpw->webhook_id);
   GNUNET_free (gpw);
 }
 
 
 /* end of merchant_api_get-private-webhooks-WEBHOOK_ID-new.c */