Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2022-2026 Taler Systems SA
4 :
5 : TALER is free software; you can redistribute it and/or modify
6 : it under the terms of the GNU Lesser General Public License as
7 : published by the Free Software Foundation; either version 2.1,
8 : or (at your option) any later version.
9 :
10 : TALER is distributed in the hope that it will be useful,
11 : but WITHOUT ANY WARRANTY; without even the implied warranty of
12 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 : GNU Lesser General Public License for more details.
14 :
15 : You should have received a copy of the GNU Lesser General
16 : Public License along with TALER; see the file COPYING.LGPL.
17 : If not, see <http://www.gnu.org/licenses/>
18 : */
19 : /**
20 : * @file merchant_api_post-private-webhooks-new.c
21 : * @brief Implementation of the POST /private/webhooks request
22 : * @author Christian Grothoff
23 : */
24 : #include "taler/platform.h"
25 : #include <curl/curl.h>
26 : #include <jansson.h>
27 : #include <microhttpd.h> /* just for HTTP status codes */
28 : #include <gnunet/gnunet_util_lib.h>
29 : #include <gnunet/gnunet_curl_lib.h>
30 : #include <taler/merchant/post-private-webhooks.h>
31 : #include "merchant_api_curl_defaults.h"
32 : #include "merchant_api_common.h"
33 : #include <taler/taler_json_lib.h>
34 : #include <taler/taler_curl_lib.h>
35 :
36 :
37 : /**
38 : * Handle for a POST /private/webhooks operation.
39 : */
40 : struct TALER_MERCHANT_PostPrivateWebhooksHandle
41 : {
42 : /**
43 : * Base URL of the merchant backend.
44 : */
45 : char *base_url;
46 :
47 : /**
48 : * The full URL for this request.
49 : */
50 : char *url;
51 :
52 : /**
53 : * Handle for the request.
54 : */
55 : struct GNUNET_CURL_Job *job;
56 :
57 : /**
58 : * Function to call with the result.
59 : */
60 : TALER_MERCHANT_PostPrivateWebhooksCallback cb;
61 :
62 : /**
63 : * Closure for @a cb.
64 : */
65 : TALER_MERCHANT_POST_PRIVATE_WEBHOOKS_RESULT_CLOSURE *cb_cls;
66 :
67 : /**
68 : * Reference to the execution context.
69 : */
70 : struct GNUNET_CURL_Context *ctx;
71 :
72 : /**
73 : * Minor context that holds body and headers.
74 : */
75 : struct TALER_CURL_PostContext post_ctx;
76 :
77 : /**
78 : * Webhook identifier.
79 : */
80 : char *webhook_id;
81 :
82 : /**
83 : * Event type that triggers this webhook.
84 : */
85 : char *event_type;
86 :
87 : /**
88 : * URL to send notifications to.
89 : */
90 : char *notification_url;
91 :
92 : /**
93 : * HTTP method to use for notifications.
94 : */
95 : char *http_method;
96 :
97 : /**
98 : * Optional template for HTTP request headers.
99 : */
100 : const char *header_template;
101 :
102 : /**
103 : * Optional template for the HTTP request body.
104 : */
105 : const char *body_template;
106 : };
107 :
108 :
109 : /**
110 : * Function called when we're done processing the
111 : * HTTP POST /private/webhooks request.
112 : *
113 : * @param cls the `struct TALER_MERCHANT_PostPrivateWebhooksHandle`
114 : * @param response_code HTTP response code, 0 on error
115 : * @param response response body, NULL if not in JSON
116 : */
117 : static void
118 0 : handle_post_webhooks_finished (void *cls,
119 : long response_code,
120 : const void *response)
121 : {
122 0 : struct TALER_MERCHANT_PostPrivateWebhooksHandle *ppwh = cls;
123 0 : const json_t *json = response;
124 0 : struct TALER_MERCHANT_PostPrivateWebhooksResponse wpr = {
125 0 : .hr.http_status = (unsigned int) response_code,
126 : .hr.reply = json
127 : };
128 :
129 0 : ppwh->job = NULL;
130 0 : GNUNET_log (GNUNET_ERROR_TYPE_INFO,
131 : "POST /private/webhooks completed with response code %u\n",
132 : (unsigned int) response_code);
133 0 : switch (response_code)
134 : {
135 0 : case 0:
136 0 : wpr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
137 0 : break;
138 0 : case MHD_HTTP_NO_CONTENT:
139 0 : break;
140 0 : case MHD_HTTP_BAD_REQUEST:
141 0 : wpr.hr.ec = TALER_JSON_get_error_code (json);
142 0 : wpr.hr.hint = TALER_JSON_get_error_hint (json);
143 0 : break;
144 0 : case MHD_HTTP_UNAUTHORIZED:
145 0 : wpr.hr.ec = TALER_JSON_get_error_code (json);
146 0 : wpr.hr.hint = TALER_JSON_get_error_hint (json);
147 0 : break;
148 0 : case MHD_HTTP_FORBIDDEN:
149 0 : wpr.hr.ec = TALER_JSON_get_error_code (json);
150 0 : wpr.hr.hint = TALER_JSON_get_error_hint (json);
151 0 : break;
152 0 : case MHD_HTTP_NOT_FOUND:
153 0 : wpr.hr.ec = TALER_JSON_get_error_code (json);
154 0 : wpr.hr.hint = TALER_JSON_get_error_hint (json);
155 0 : break;
156 0 : case MHD_HTTP_CONFLICT:
157 0 : wpr.hr.ec = TALER_JSON_get_error_code (json);
158 0 : wpr.hr.hint = TALER_JSON_get_error_hint (json);
159 0 : break;
160 0 : case MHD_HTTP_INTERNAL_SERVER_ERROR:
161 0 : wpr.hr.ec = TALER_JSON_get_error_code (json);
162 0 : wpr.hr.hint = TALER_JSON_get_error_hint (json);
163 0 : break;
164 0 : default:
165 0 : TALER_MERCHANT_parse_error_details_ (json,
166 : response_code,
167 : &wpr.hr);
168 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
169 : "Unexpected response code %u/%d\n",
170 : (unsigned int) response_code,
171 : (int) wpr.hr.ec);
172 0 : GNUNET_break_op (0);
173 0 : break;
174 : }
175 0 : ppwh->cb (ppwh->cb_cls,
176 : &wpr);
177 0 : TALER_MERCHANT_post_private_webhooks_cancel (ppwh);
178 0 : }
179 :
180 :
181 : struct TALER_MERCHANT_PostPrivateWebhooksHandle *
182 0 : TALER_MERCHANT_post_private_webhooks_create (
183 : struct GNUNET_CURL_Context *ctx,
184 : const char *url,
185 : const char *webhook_id,
186 : const char *event_type,
187 : const char *notification_url,
188 : const char *http_method)
189 : {
190 : struct TALER_MERCHANT_PostPrivateWebhooksHandle *ppwh;
191 :
192 0 : ppwh = GNUNET_new (struct TALER_MERCHANT_PostPrivateWebhooksHandle);
193 0 : ppwh->ctx = ctx;
194 0 : ppwh->base_url = GNUNET_strdup (url);
195 0 : ppwh->webhook_id = GNUNET_strdup (webhook_id);
196 0 : ppwh->event_type = GNUNET_strdup (event_type);
197 0 : ppwh->notification_url = GNUNET_strdup (notification_url);
198 0 : ppwh->http_method = GNUNET_strdup (http_method);
199 0 : return ppwh;
200 : }
201 :
202 :
203 : enum GNUNET_GenericReturnValue
204 0 : TALER_MERCHANT_post_private_webhooks_set_options_ (
205 : struct TALER_MERCHANT_PostPrivateWebhooksHandle *ppwh,
206 : unsigned int num_options,
207 : const struct TALER_MERCHANT_PostPrivateWebhooksOptionValue *options)
208 : {
209 0 : for (unsigned int i = 0; i < num_options; i++)
210 : {
211 0 : switch (options[i].option)
212 : {
213 0 : case TALER_MERCHANT_POST_PRIVATE_WEBHOOKS_OPTION_END:
214 0 : return GNUNET_OK;
215 0 : case TALER_MERCHANT_POST_PRIVATE_WEBHOOKS_OPTION_HEADER_TEMPLATE:
216 0 : ppwh->header_template = options[i].details.header_template;
217 0 : break;
218 0 : case TALER_MERCHANT_POST_PRIVATE_WEBHOOKS_OPTION_BODY_TEMPLATE:
219 0 : ppwh->body_template = options[i].details.body_template;
220 0 : break;
221 0 : default:
222 0 : GNUNET_break (0);
223 0 : return GNUNET_SYSERR;
224 : }
225 : }
226 0 : return GNUNET_OK;
227 : }
228 :
229 :
230 : enum TALER_ErrorCode
231 0 : TALER_MERCHANT_post_private_webhooks_start (
232 : struct TALER_MERCHANT_PostPrivateWebhooksHandle *ppwh,
233 : TALER_MERCHANT_PostPrivateWebhooksCallback cb,
234 : TALER_MERCHANT_POST_PRIVATE_WEBHOOKS_RESULT_CLOSURE *cb_cls)
235 : {
236 : json_t *req_obj;
237 : CURL *eh;
238 :
239 0 : ppwh->cb = cb;
240 0 : ppwh->cb_cls = cb_cls;
241 0 : ppwh->url = TALER_url_join (ppwh->base_url,
242 : "private/webhooks",
243 : NULL);
244 0 : if (NULL == ppwh->url)
245 0 : return TALER_EC_GENERIC_CONFIGURATION_INVALID;
246 0 : req_obj = GNUNET_JSON_PACK (
247 : GNUNET_JSON_pack_string ("webhook_id",
248 : ppwh->webhook_id),
249 : GNUNET_JSON_pack_string ("event_type",
250 : ppwh->event_type),
251 : GNUNET_JSON_pack_string ("url",
252 : ppwh->notification_url),
253 : GNUNET_JSON_pack_string ("http_method",
254 : ppwh->http_method),
255 : GNUNET_JSON_pack_allow_null (
256 : GNUNET_JSON_pack_string ("header_template",
257 : ppwh->header_template)),
258 : GNUNET_JSON_pack_allow_null (
259 : GNUNET_JSON_pack_string ("body_template",
260 : ppwh->body_template)));
261 0 : eh = TALER_MERCHANT_curl_easy_get_ (ppwh->url);
262 0 : if ( (NULL == eh) ||
263 : (GNUNET_OK !=
264 0 : TALER_curl_easy_post (&ppwh->post_ctx,
265 : eh,
266 : req_obj)) )
267 : {
268 0 : GNUNET_break (0);
269 0 : json_decref (req_obj);
270 0 : if (NULL != eh)
271 0 : curl_easy_cleanup (eh);
272 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
273 : }
274 0 : json_decref (req_obj);
275 0 : ppwh->job = GNUNET_CURL_job_add2 (ppwh->ctx,
276 : eh,
277 0 : ppwh->post_ctx.headers,
278 : &handle_post_webhooks_finished,
279 : ppwh);
280 0 : if (NULL == ppwh->job)
281 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
282 0 : return TALER_EC_NONE;
283 : }
284 :
285 :
286 : void
287 0 : TALER_MERCHANT_post_private_webhooks_cancel (
288 : struct TALER_MERCHANT_PostPrivateWebhooksHandle *ppwh)
289 : {
290 0 : if (NULL != ppwh->job)
291 : {
292 0 : GNUNET_CURL_job_cancel (ppwh->job);
293 0 : ppwh->job = NULL;
294 : }
295 0 : TALER_curl_easy_post_finished (&ppwh->post_ctx);
296 0 : GNUNET_free (ppwh->webhook_id);
297 0 : GNUNET_free (ppwh->event_type);
298 0 : GNUNET_free (ppwh->notification_url);
299 0 : GNUNET_free (ppwh->http_method);
300 0 : GNUNET_free (ppwh->url);
301 0 : GNUNET_free (ppwh->base_url);
302 0 : GNUNET_free (ppwh);
303 0 : }
304 :
305 :
306 : /* end of merchant_api_post-private-webhooks-new.c */
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