merchant

merchant_api_patch-private-webhooks-WEBHOOK_ID.c (9356B)

---

 /*
   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 src/lib/merchant_api_patch-private-webhooks-WEBHOOK_ID.c
  * @brief Implementation of the PATCH /private/webhooks/$WEBHOOK_ID request
  * @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/patch-private-webhooks-WEBHOOK_ID.h>
 #include "merchant_api_curl_defaults.h"
 #include "merchant_api_common.h"
 #include <taler/taler_json_lib.h>
 #include <taler/taler_curl_lib.h>
 
 
 /**
  * Handle for a PATCH /private/webhooks/$WEBHOOK_ID operation.
  */
 struct TALER_MERCHANT_PatchPrivateWebhookHandle
 {
   /**
    * 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_PatchPrivateWebhookCallback cb;
 
   /**
    * Closure for @a cb.
    */
   TALER_MERCHANT_PATCH_PRIVATE_WEBHOOK_RESULT_CLOSURE *cb_cls;
 
   /**
    * Reference to the execution context.
    */
   struct GNUNET_CURL_Context *ctx;
 
   /**
    * Minor context that holds body and headers.
    */
   struct TALER_CURL_PostContext post_ctx;
 
   /**
    * Identifier of the webhook to update.
    */
   char *webhook_id;
 
   /**
    * New event type.
    */
   char *event_type;
 
   /**
    * New notification URL template.
    */
   char *url_template;
 
   /**
    * New HTTP method.
    */
   char *http_method;
 
   /**
    * Optional new header template.
    */
   char *header_template;
 
   /**
    * Optional new body template.
    */
   char *body_template;
 };
 
 
 /**
  * Function called when we're done processing the
  * HTTP PATCH /private/webhooks/$WEBHOOK_ID request.
  *
  * @param cls the `struct TALER_MERCHANT_PatchPrivateWebhookHandle`
  * @param response_code HTTP response code, 0 on error
  * @param response response body, NULL if not in JSON
  */
 static void
 handle_patch_webhook_finished (void *cls,
                                long response_code,
                                const void *response)
 {
   struct TALER_MERCHANT_PatchPrivateWebhookHandle *wph = cls;
   const json_t *json = response;
   struct TALER_MERCHANT_PatchPrivateWebhookResponse wpr = {
     .hr.http_status = (unsigned int) response_code,
     .hr.reply = json
   };
 
   wph->job = NULL;
   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
               "PATCH /private/webhooks/$WEBHOOK_ID completed with response code %u\n",
               (unsigned int) response_code);
   switch (response_code)
   {
   case 0:
     wpr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
     break;
   case MHD_HTTP_NO_CONTENT:
     break;
   case MHD_HTTP_BAD_REQUEST:
     wpr.hr.ec = TALER_JSON_get_error_code (json);
     wpr.hr.hint = TALER_JSON_get_error_hint (json);
     GNUNET_break_op (0);
     /* This should never happen, either us
      * or the merchant is buggy (or API version conflict);
      * just pass JSON reply to the application */
     break;
   case MHD_HTTP_UNAUTHORIZED:
     wpr.hr.ec = TALER_JSON_get_error_code (json);
     wpr.hr.hint = TALER_JSON_get_error_hint (json);
     /* Nothing really to verify, merchant says we need to authenticate. */
     break;
   case MHD_HTTP_FORBIDDEN:
     wpr.hr.ec = TALER_JSON_get_error_code (json);
     wpr.hr.hint = TALER_JSON_get_error_hint (json);
     break;
   case MHD_HTTP_NOT_FOUND:
     wpr.hr.ec = TALER_JSON_get_error_code (json);
     wpr.hr.hint = TALER_JSON_get_error_hint (json);
     break;
   case MHD_HTTP_INTERNAL_SERVER_ERROR:
     wpr.hr.ec = TALER_JSON_get_error_code (json);
     wpr.hr.hint = TALER_JSON_get_error_hint (json);
     /* Server had an internal issue; we should retry,
        but this API leaves this to the application */
     break;
   default:
     TALER_MERCHANT_parse_error_details_ (json,
                                          response_code,
                                          &wpr.hr);
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Unexpected response code %u/%d\n",
                 (unsigned int) response_code,
                 (int) wpr.hr.ec);
     GNUNET_break_op (0);
     break;
   }
   wph->cb (wph->cb_cls,
            &wpr);
   TALER_MERCHANT_patch_private_webhook_cancel (wph);
 }
 
 
 struct TALER_MERCHANT_PatchPrivateWebhookHandle *
 TALER_MERCHANT_patch_private_webhook_create (
   struct GNUNET_CURL_Context *ctx,
   const char *url,
   const char *webhook_id,
   const char *event_type,
   const char *url_template,
   const char *http_method)
 {
   struct TALER_MERCHANT_PatchPrivateWebhookHandle *wph;
 
   wph = GNUNET_new (struct TALER_MERCHANT_PatchPrivateWebhookHandle);
   wph->ctx = ctx;
   wph->base_url = GNUNET_strdup (url);
   wph->webhook_id = GNUNET_strdup (webhook_id);
   wph->event_type = GNUNET_strdup (event_type);
   wph->url_template = GNUNET_strdup (url_template);
   wph->http_method = GNUNET_strdup (http_method);
   return wph;
 }
 
 
 enum GNUNET_GenericReturnValue
 TALER_MERCHANT_patch_private_webhook_set_options_ (
   struct TALER_MERCHANT_PatchPrivateWebhookHandle *wph,
   unsigned int num_options,
   const struct TALER_MERCHANT_PatchPrivateWebhookOptionValue *options)
 {
   for (unsigned int i = 0; i < num_options; i++)
   {
     switch (options[i].option)
     {
     case TALER_MERCHANT_PATCH_PRIVATE_WEBHOOK_OPTION_END:
       return GNUNET_OK;
     case TALER_MERCHANT_PATCH_PRIVATE_WEBHOOK_OPTION_HEADER_TEMPLATE:
       GNUNET_free (wph->header_template);
       wph->header_template = GNUNET_strdup (options[i].details.header_template);
       break;
     case TALER_MERCHANT_PATCH_PRIVATE_WEBHOOK_OPTION_BODY_TEMPLATE:
       GNUNET_free (wph->body_template);
       wph->body_template = GNUNET_strdup (options[i].details.body_template);
       break;
     default:
       GNUNET_break (0);
       return GNUNET_SYSERR;
     }
   }
   return GNUNET_OK;
 }
 
 
 enum TALER_ErrorCode
 TALER_MERCHANT_patch_private_webhook_start (
   struct TALER_MERCHANT_PatchPrivateWebhookHandle *wph,
   TALER_MERCHANT_PatchPrivateWebhookCallback cb,
   TALER_MERCHANT_PATCH_PRIVATE_WEBHOOK_RESULT_CLOSURE *cb_cls)
 {
   json_t *req_obj;
   CURL *eh;
 
   wph->cb = cb;
   wph->cb_cls = cb_cls;
   {
     char *path;
 
     GNUNET_asprintf (&path,
                      "private/webhooks/%s",
                      wph->webhook_id);
     wph->url = TALER_url_join (wph->base_url,
                                path,
                                NULL);
     GNUNET_free (path);
   }
   if (NULL == wph->url)
     return TALER_EC_GENERIC_CONFIGURATION_INVALID;
   req_obj = GNUNET_JSON_PACK (
     GNUNET_JSON_pack_string ("event_type",
                              wph->event_type),
     GNUNET_JSON_pack_string ("url",
                              wph->url_template),
     GNUNET_JSON_pack_string ("http_method",
                              wph->http_method),
     GNUNET_JSON_pack_allow_null (
       GNUNET_JSON_pack_string ("header_template",
                                wph->header_template)),
     GNUNET_JSON_pack_allow_null (
       GNUNET_JSON_pack_string ("body_template",
                                wph->body_template)));
   eh = TALER_MERCHANT_curl_easy_get_ (wph->url);
   if ( (NULL == eh) ||
        (GNUNET_OK !=
         TALER_curl_easy_post (&wph->post_ctx,
                               eh,
                               req_obj)) )
   {
     GNUNET_break (0);
     json_decref (req_obj);
     if (NULL != eh)
       curl_easy_cleanup (eh);
     return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
   }
   json_decref (req_obj);
   GNUNET_assert (CURLE_OK ==
                  curl_easy_setopt (eh,
                                    CURLOPT_CUSTOMREQUEST,
                                    MHD_HTTP_METHOD_PATCH));
   wph->job = GNUNET_CURL_job_add2 (wph->ctx,
                                    eh,
                                    wph->post_ctx.headers,
                                    &handle_patch_webhook_finished,
                                    wph);
   if (NULL == wph->job)
     return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
   return TALER_EC_NONE;
 }
 
 
 void
 TALER_MERCHANT_patch_private_webhook_cancel (
   struct TALER_MERCHANT_PatchPrivateWebhookHandle *wph)
 {
   if (NULL != wph->job)
   {
     GNUNET_CURL_job_cancel (wph->job);
     wph->job = NULL;
   }
   TALER_curl_easy_post_finished (&wph->post_ctx);
   GNUNET_free (wph->url);
   GNUNET_free (wph->header_template);
   GNUNET_free (wph->body_template);
   GNUNET_free (wph->base_url);
   GNUNET_free (wph->webhook_id);
   GNUNET_free (wph->event_type);
   GNUNET_free (wph->url_template);
   GNUNET_free (wph->http_method);
   GNUNET_free (wph);
 }
 
 
 /* end of merchant_api_patch-private-webhooks-WEBHOOK_ID.c */