Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2020-2024 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_products.c
21 : * @brief Implementation of the POST /products request
22 : * of the merchant's HTTP API
23 : * @author Christian Grothoff
24 : */
25 : #include "platform.h"
26 : #include <curl/curl.h>
27 : #include <jansson.h>
28 : #include <microhttpd.h> /* just for HTTP status codes */
29 : #include <gnunet/gnunet_util_lib.h>
30 : #include "taler_merchant_service.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 /products/$ID operation.
39 : */
40 : struct TALER_MERCHANT_ProductsPostHandle
41 : {
42 :
43 : /**
44 : * The url for this request.
45 : */
46 : char *url;
47 :
48 : /**
49 : * Handle for the request.
50 : */
51 : struct GNUNET_CURL_Job *job;
52 :
53 : /**
54 : * Function to call with the result.
55 : */
56 : TALER_MERCHANT_ProductsPostCallback cb;
57 :
58 : /**
59 : * Closure for @a cb.
60 : */
61 : void *cb_cls;
62 :
63 : /**
64 : * Reference to the execution context.
65 : */
66 : struct GNUNET_CURL_Context *ctx;
67 :
68 : /**
69 : * Minor context that holds body and headers.
70 : */
71 : struct TALER_CURL_PostContext post_ctx;
72 :
73 : };
74 :
75 :
76 : /**
77 : * Function called when we're done processing the
78 : * HTTP POST /products request.
79 : *
80 : * @param cls the `struct TALER_MERCHANT_ProductsPostHandle`
81 : * @param response_code HTTP response code, 0 on error
82 : * @param response response body, NULL if not in JSON
83 : */
84 : static void
85 12 : handle_post_products_finished (void *cls,
86 : long response_code,
87 : const void *response)
88 : {
89 12 : struct TALER_MERCHANT_ProductsPostHandle *pph = cls;
90 12 : const json_t *json = response;
91 12 : struct TALER_MERCHANT_HttpResponse hr = {
92 12 : .http_status = (unsigned int) response_code,
93 : .reply = json
94 : };
95 :
96 12 : pph->job = NULL;
97 12 : GNUNET_log (GNUNET_ERROR_TYPE_INFO,
98 : "POST /products completed with response code %u\n",
99 : (unsigned int) response_code);
100 12 : switch (response_code)
101 : {
102 0 : case 0:
103 0 : hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
104 0 : break;
105 10 : case MHD_HTTP_NO_CONTENT:
106 10 : break;
107 0 : case MHD_HTTP_BAD_REQUEST:
108 0 : hr.ec = TALER_JSON_get_error_code (json);
109 0 : hr.hint = TALER_JSON_get_error_hint (json);
110 : /* This should never happen, either us
111 : * or the merchant is buggy (or API version conflict);
112 : * just pass JSON reply to the application */
113 0 : break;
114 0 : case MHD_HTTP_UNAUTHORIZED:
115 0 : hr.ec = TALER_JSON_get_error_code (json);
116 0 : hr.hint = TALER_JSON_get_error_hint (json);
117 : /* Nothing really to verify, merchant says we need to authenticate. */
118 0 : break;
119 0 : case MHD_HTTP_FORBIDDEN:
120 0 : hr.ec = TALER_JSON_get_error_code (json);
121 0 : hr.hint = TALER_JSON_get_error_hint (json);
122 : /* Nothing really to verify, merchant says we tried to abort the payment
123 : * after it was successful. We should pass the JSON reply to the
124 : * application */
125 0 : break;
126 0 : case MHD_HTTP_NOT_FOUND:
127 0 : hr.ec = TALER_JSON_get_error_code (json);
128 0 : hr.hint = TALER_JSON_get_error_hint (json);
129 : /* Nothing really to verify, this should never
130 : happen, we should pass the JSON reply to the
131 : application */
132 0 : break;
133 2 : case MHD_HTTP_CONFLICT:
134 2 : hr.ec = TALER_JSON_get_error_code (json);
135 2 : hr.hint = TALER_JSON_get_error_hint (json);
136 2 : break;
137 0 : case MHD_HTTP_INTERNAL_SERVER_ERROR:
138 0 : hr.ec = TALER_JSON_get_error_code (json);
139 0 : hr.hint = TALER_JSON_get_error_hint (json);
140 : /* Server had an internal issue; we should retry,
141 : but this API leaves this to the application */
142 0 : break;
143 0 : default:
144 0 : TALER_MERCHANT_parse_error_details_ (json,
145 : response_code,
146 : &hr);
147 : /* unexpected response code */
148 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
149 : "Unexpected response code %u/%d\n",
150 : (unsigned int) response_code,
151 : (int) hr.ec);
152 0 : GNUNET_break_op (0);
153 0 : break;
154 : }
155 12 : pph->cb (pph->cb_cls,
156 : &hr);
157 12 : TALER_MERCHANT_products_post_cancel (pph);
158 12 : }
159 :
160 :
161 : struct TALER_MERCHANT_ProductsPostHandle *
162 12 : TALER_MERCHANT_products_post3 (
163 : struct GNUNET_CURL_Context *ctx,
164 : const char *backend_url,
165 : const char *product_id,
166 : const char *description,
167 : const json_t *description_i18n,
168 : const char *unit,
169 : const struct TALER_Amount *price,
170 : const char *image,
171 : const json_t *taxes,
172 : int64_t total_stock,
173 : const json_t *address,
174 : struct GNUNET_TIME_Timestamp next_restock,
175 : uint32_t minimum_age,
176 : unsigned int num_cats,
177 : const uint64_t *cats,
178 : TALER_MERCHANT_ProductsPostCallback cb,
179 : void *cb_cls)
180 : {
181 : struct TALER_MERCHANT_ProductsPostHandle *pph;
182 : json_t *req_obj;
183 : json_t *categories;
184 :
185 12 : if (0 == num_cats)
186 : {
187 12 : categories = NULL;
188 : }
189 : else
190 : {
191 0 : categories = json_array ();
192 0 : GNUNET_assert (NULL != categories);
193 0 : for (unsigned int i = 0; i<num_cats; i++)
194 0 : GNUNET_assert (0 ==
195 : json_array_append_new (categories,
196 : json_integer (cats[i])));
197 : }
198 12 : req_obj = GNUNET_JSON_PACK (
199 : GNUNET_JSON_pack_string ("product_id",
200 : product_id),
201 : GNUNET_JSON_pack_string ("description",
202 : description),
203 : GNUNET_JSON_pack_allow_null (
204 : GNUNET_JSON_pack_object_incref ("description_i18n",
205 : (json_t *) description_i18n)),
206 : GNUNET_JSON_pack_allow_null (
207 : GNUNET_JSON_pack_array_steal ("categories",
208 : categories)),
209 : GNUNET_JSON_pack_string ("unit",
210 : unit),
211 : TALER_JSON_pack_amount ("price",
212 : price),
213 : GNUNET_JSON_pack_string ("image",
214 : image),
215 : GNUNET_JSON_pack_allow_null (
216 : GNUNET_JSON_pack_array_incref ("taxes",
217 : (json_t *) taxes)),
218 : GNUNET_JSON_pack_uint64 ("total_stock",
219 : total_stock),
220 : GNUNET_JSON_pack_allow_null (
221 : GNUNET_JSON_pack_uint64 ("minimum_age",
222 : minimum_age)),
223 : GNUNET_JSON_pack_allow_null (
224 : GNUNET_JSON_pack_object_incref ("address",
225 : (json_t *) address)),
226 : GNUNET_JSON_pack_allow_null (
227 : GNUNET_JSON_pack_timestamp ("next_restock",
228 : next_restock)));
229 12 : pph = GNUNET_new (struct TALER_MERCHANT_ProductsPostHandle);
230 12 : pph->ctx = ctx;
231 12 : pph->cb = cb;
232 12 : pph->cb_cls = cb_cls;
233 12 : pph->url = TALER_url_join (backend_url,
234 : "private/products",
235 : NULL);
236 12 : if (NULL == pph->url)
237 : {
238 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
239 : "Could not construct request URL.\n");
240 0 : json_decref (req_obj);
241 0 : GNUNET_free (pph);
242 0 : return NULL;
243 : }
244 : {
245 : CURL *eh;
246 :
247 12 : eh = TALER_MERCHANT_curl_easy_get_ (pph->url);
248 12 : GNUNET_assert (GNUNET_OK ==
249 : TALER_curl_easy_post (&pph->post_ctx,
250 : eh,
251 : req_obj));
252 12 : json_decref (req_obj);
253 24 : pph->job = GNUNET_CURL_job_add2 (ctx,
254 : eh,
255 12 : pph->post_ctx.headers,
256 : &handle_post_products_finished,
257 : pph);
258 12 : GNUNET_assert (NULL != pph->job);
259 : }
260 12 : return pph;
261 : }
262 :
263 :
264 : struct TALER_MERCHANT_ProductsPostHandle *
265 12 : TALER_MERCHANT_products_post2 (
266 : struct GNUNET_CURL_Context *ctx,
267 : const char *backend_url,
268 : const char *product_id,
269 : const char *description,
270 : const json_t *description_i18n,
271 : const char *unit,
272 : const struct TALER_Amount *price,
273 : const char *image,
274 : const json_t *taxes,
275 : int64_t total_stock,
276 : const json_t *address,
277 : struct GNUNET_TIME_Timestamp next_restock,
278 : uint32_t minimum_age,
279 : TALER_MERCHANT_ProductsPostCallback cb,
280 : void *cb_cls)
281 : {
282 12 : return TALER_MERCHANT_products_post3 (ctx,
283 : backend_url,
284 : product_id,
285 : description,
286 : description_i18n,
287 : unit,
288 : price,
289 : image,
290 : taxes,
291 : total_stock,
292 : address,
293 : next_restock,
294 : minimum_age,
295 : 0,
296 : NULL,
297 : cb,
298 : cb_cls);
299 : }
300 :
301 :
302 : struct TALER_MERCHANT_ProductsPostHandle *
303 0 : TALER_MERCHANT_products_post (
304 : struct GNUNET_CURL_Context *ctx,
305 : const char *backend_url,
306 : const char *product_id,
307 : const char *description,
308 : const json_t *description_i18n,
309 : const char *unit,
310 : const struct TALER_Amount *price,
311 : const char *image,
312 : const json_t *taxes,
313 : int64_t total_stock,
314 : const json_t *address,
315 : struct GNUNET_TIME_Timestamp next_restock,
316 : TALER_MERCHANT_ProductsPostCallback cb,
317 : void *cb_cls)
318 : {
319 0 : return TALER_MERCHANT_products_post2 (ctx,
320 : backend_url,
321 : product_id,
322 : description,
323 : description_i18n,
324 : unit,
325 : price,
326 : image,
327 : taxes,
328 : total_stock,
329 : address,
330 : next_restock,
331 : 0,
332 : cb,
333 : cb_cls);
334 : }
335 :
336 :
337 : void
338 12 : TALER_MERCHANT_products_post_cancel (
339 : struct TALER_MERCHANT_ProductsPostHandle *pph)
340 : {
341 12 : if (NULL != pph->job)
342 : {
343 0 : GNUNET_CURL_job_cancel (pph->job);
344 0 : pph->job = NULL;
345 : }
346 12 : TALER_curl_easy_post_finished (&pph->post_ctx);
347 12 : GNUNET_free (pph->url);
348 12 : GNUNET_free (pph);
349 12 : }
350 :
351 :
352 : /* end of merchant_api_post_products.c */
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