/*
This file is part of TALER
Copyright (C) 2022 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
*/
/**
* @file merchant_api_patch_webhook.c
* @brief Implementation of the PATCH /webhooks/$ID request
* of the merchant's HTTP API
* @author Priscilla HUANG
*/
#include "platform.h"
#include
#include
#include /* just for HTTP status codes */
#include
#include "taler_merchant_service.h"
#include "merchant_api_curl_defaults.h"
#include "merchant_api_common.h"
#include
#include
/**
* Handle for a PATCH /webhooks/$ID operation.
*/
struct TALER_MERCHANT_WebhookPatchHandle
{
/**
* The url for this request.
*/
char *url;
/**
* Handle for the request.
*/
struct GNUNET_CURL_Job *job;
/**
* Function to call with the result.
*/
TALER_MERCHANT_WebhookPatchCallback cb;
/**
* Closure for @a cb.
*/
void *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;
};
/**
* Function called when we're done processing the
* HTTP PATCH /webhooks/$ID request.
*
* @param cls the `struct TALER_MERCHANT_WebhookPatchHandle`
* @param response_code HTTP response code, 0 on error
* @param response response body, NULL if not in JSON
*/
static void
handle_patch_webhook_finished (void *cls,
long response_code,
const void *response)
{
struct TALER_MERCHANT_WebhookPatchHandle *wph = cls;
const json_t *json = response;
struct TALER_MERCHANT_HttpResponse hr = {
.http_status = (unsigned int) response_code,
.reply = json
};
wph->job = NULL;
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"PATCH /webhooks/$ID completed with response code %u\n",
(unsigned int) response_code);
switch (response_code)
{
case 0:
hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
break;
case MHD_HTTP_NO_CONTENT:
break;
case MHD_HTTP_BAD_REQUEST:
hr.ec = TALER_JSON_get_error_code (json);
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:
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
/* Nothing really to verify, merchant says we need to authenticate. */
break;
case MHD_HTTP_FORBIDDEN:
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
/* Nothing really to verify, merchant says we tried to abort the payment
* after it was successful. We should pass the JSON reply to the
* application */
break;
case MHD_HTTP_NOT_FOUND:
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
break;
case MHD_HTTP_CONFLICT:
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
break;
case MHD_HTTP_INTERNAL_SERVER_ERROR:
hr.ec = TALER_JSON_get_error_code (json);
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,
&hr);
/* unexpected response code */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Unexpected response code %u/%d\n",
(unsigned int) response_code,
(int) hr.ec);
GNUNET_break_op (0);
break;
}
wph->cb (wph->cb_cls,
&hr);
TALER_MERCHANT_webhook_patch_cancel (wph);
}
struct TALER_MERCHANT_WebhookPatchHandle *
TALER_MERCHANT_webhook_patch (
struct GNUNET_CURL_Context *ctx,
const char *backend_url,
const char *webhook_id,
const char *event_type,
const char *url,
const char *http_method,
const char *header_template,
const char *body_template,
TALER_MERCHANT_WebhookPatchCallback cb,
void *cb_cls)
{
struct TALER_MERCHANT_WebhookPatchHandle *wph;
json_t *req_obj;
req_obj = GNUNET_JSON_PACK (
GNUNET_JSON_pack_string ("event_type",
event_type),
GNUNET_JSON_pack_string ("url",
url),
GNUNET_JSON_pack_string ("http_method",
http_method),
GNUNET_JSON_pack_string ("header_template",
header_template),
GNUNET_JSON_pack_string ("body_template",
body_template));
wph = GNUNET_new (struct TALER_MERCHANT_WebhookPatchHandle);
wph->ctx = ctx;
wph->cb = cb;
wph->cb_cls = cb_cls;
{
char *path;
GNUNET_asprintf (&path,
"private/webhooks/%s",
webhook_id);
wph->url = TALER_url_join (backend_url,
path,
NULL);
GNUNET_free (path);
}
if (NULL == wph->url)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Could not construct request URL.\n");
json_decref (req_obj);
GNUNET_free (wph);
return NULL;
}
{
CURL *eh;
eh = TALER_MERCHANT_curl_easy_get_ (wph->url);
if (GNUNET_OK !=
TALER_curl_easy_post (&wph->post_ctx,
eh,
req_obj))
{
GNUNET_break (0);
curl_easy_cleanup (eh);
json_decref (req_obj);
GNUNET_free (wph);
return NULL;
}
json_decref (req_obj);
GNUNET_assert (CURLE_OK ==
curl_easy_setopt (eh,
CURLOPT_CUSTOMREQUEST,
MHD_HTTP_METHOD_PATCH));
wph->job = GNUNET_CURL_job_add2 (ctx,
eh,
wph->post_ctx.headers,
&handle_patch_webhook_finished,
wph);
}
return wph;
}
void
TALER_MERCHANT_webhook_patch_cancel (
struct TALER_MERCHANT_WebhookPatchHandle *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);
}
/* end of merchant_api_patch_webhook.c */