Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2020, 2021 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_patch_product.c
21 : * @brief Implementation of the PATCH /products/$ID request
22 : * of the merchant's HTTP API
23 : * @author Christian Grothoff
24 : */
25 : #include "platform.h"
26 : #include <curl/curl.h>
27 : #include <jansson.h>
28 : #include <microhttpd.h> /* just for HTTP status codes */
29 : #include <gnunet/gnunet_util_lib.h>
30 : #include "taler_merchant_service.h"
31 : #include "merchant_api_common.h"
32 : #include "merchant_api_curl_defaults.h"
33 : #include <taler/taler_json_lib.h>
34 : #include <taler/taler_curl_lib.h>
35 :
36 :
37 : /**
38 : * Handle for a PATCH /products/$ID operation.
39 : */
40 : struct TALER_MERCHANT_ProductPatchHandle
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_ProductPatchCallback 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 PATCH /products/$ID request.
79 : *
80 : * @param cls the `struct TALER_MERCHANT_ProductPatchHandle`
81 : * @param response_code HTTP response code, 0 on error
82 : * @param response response body, NULL if not in JSON
83 : */
84 : static void
85 12 : handle_patch_product_finished (void *cls,
86 : long response_code,
87 : const void *response)
88 : {
89 12 : struct TALER_MERCHANT_ProductPatchHandle *pph = cls;
90 12 : const json_t *json = response;
91 12 : struct TALER_MERCHANT_HttpResponse hr = {
92 12 : .http_status = (unsigned int) response_code,
93 : .reply = json
94 : };
95 :
96 12 : pph->job = NULL;
97 12 : GNUNET_log (GNUNET_ERROR_TYPE_INFO,
98 : "PATCH /products/$ID 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 0 : GNUNET_break_op (0);
111 : /* This should never happen, either us
112 : * or the merchant is buggy (or API version conflict);
113 : * just pass JSON reply to the application */
114 0 : break;
115 0 : case MHD_HTTP_UNAUTHORIZED:
116 0 : hr.ec = TALER_JSON_get_error_code (json);
117 0 : hr.hint = TALER_JSON_get_error_hint (json);
118 : /* Nothing really to verify, merchant says we need to authenticate. */
119 0 : break;
120 0 : case MHD_HTTP_FORBIDDEN:
121 0 : hr.ec = TALER_JSON_get_error_code (json);
122 0 : hr.hint = TALER_JSON_get_error_hint (json);
123 : /* Nothing really to verify, merchant says we tried to abort the payment
124 : * after it was successful. We should pass the JSON reply to the
125 : * application */
126 0 : break;
127 2 : case MHD_HTTP_NOT_FOUND:
128 2 : hr.ec = TALER_JSON_get_error_code (json);
129 2 : hr.hint = TALER_JSON_get_error_hint (json);
130 2 : break;
131 0 : case MHD_HTTP_CONFLICT:
132 0 : hr.ec = TALER_JSON_get_error_code (json);
133 0 : hr.hint = TALER_JSON_get_error_hint (json);
134 0 : break;
135 0 : case MHD_HTTP_INTERNAL_SERVER_ERROR:
136 0 : hr.ec = TALER_JSON_get_error_code (json);
137 0 : hr.hint = TALER_JSON_get_error_hint (json);
138 : /* Server had an internal issue; we should retry,
139 : but this API leaves this to the application */
140 0 : break;
141 0 : default:
142 0 : TALER_MERCHANT_parse_error_details_ (json,
143 : response_code,
144 : &hr);
145 : /* unexpected response code */
146 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
147 : "Unexpected response code %u/%d\n",
148 : (unsigned int) response_code,
149 : (int) hr.ec);
150 0 : GNUNET_break_op (0);
151 0 : break;
152 : }
153 12 : pph->cb (pph->cb_cls,
154 : &hr);
155 12 : TALER_MERCHANT_product_patch_cancel (pph);
156 12 : }
157 :
158 :
159 : struct TALER_MERCHANT_ProductPatchHandle *
160 12 : TALER_MERCHANT_product_patch2 (
161 : struct GNUNET_CURL_Context *ctx,
162 : const char *backend_url,
163 : const char *product_id,
164 : const char *description,
165 : const json_t *description_i18n,
166 : const char *unit,
167 : const struct TALER_Amount *unit_prices,
168 : size_t unit_price_len,
169 : const char *image,
170 : const json_t *taxes,
171 : int64_t total_stock,
172 : uint32_t total_stock_frac,
173 : bool unit_allow_fraction,
174 : const uint32_t *unit_precision_level,
175 : uint64_t total_lost,
176 : const json_t *address,
177 : struct GNUNET_TIME_Timestamp next_restock,
178 : TALER_MERCHANT_ProductPatchCallback cb,
179 : void *cb_cls)
180 : {
181 : struct TALER_MERCHANT_ProductPatchHandle *pph;
182 : json_t *req_obj;
183 : char unit_total_stock_buf[64];
184 :
185 12 : TALER_MERCHANT_format_stock_string (total_stock,
186 : total_stock_frac,
187 : unit_total_stock_buf,
188 : sizeof (unit_total_stock_buf));
189 :
190 : {
191 12 : req_obj = GNUNET_JSON_PACK (
192 : /* FIXME: once we move to the new-style API,
193 : allow applications to set the product name properly! */
194 : GNUNET_JSON_pack_string ("product_name",
195 : description),
196 : GNUNET_JSON_pack_string ("description",
197 : description),
198 : GNUNET_JSON_pack_object_incref ("description_i18n",
199 : (json_t *) description_i18n),
200 : GNUNET_JSON_pack_string ("unit",
201 : unit),
202 : TALER_JSON_pack_amount_array ("unit_price",
203 : unit_price_len,
204 : unit_prices),
205 : GNUNET_JSON_pack_string ("image",
206 : image),
207 : GNUNET_JSON_pack_array_incref ("taxes",
208 : (json_t *) taxes),
209 : GNUNET_JSON_pack_string ("unit_total_stock",
210 : unit_total_stock_buf),
211 : GNUNET_JSON_pack_bool ("unit_allow_fraction",
212 : unit_allow_fraction),
213 : GNUNET_JSON_pack_uint64 ("total_lost",
214 : total_lost),
215 : GNUNET_JSON_pack_object_incref ("address",
216 : (json_t *) address),
217 : GNUNET_JSON_pack_timestamp ("next_restock",
218 : next_restock));
219 : }
220 12 : if (NULL != unit_precision_level)
221 : {
222 6 : GNUNET_assert (0 ==
223 : json_object_set_new (req_obj,
224 : "unit_precision_level",
225 : json_integer (
226 : *unit_precision_level)));
227 : }
228 12 : if (! unit_allow_fraction)
229 : {
230 8 : GNUNET_assert (0 ==
231 : json_object_del (req_obj,
232 : "unit_allow_fraction"));
233 8 : if (NULL != unit_precision_level)
234 2 : GNUNET_assert (0 ==
235 : json_object_del (req_obj,
236 : "unit_precision_level"));
237 : }
238 12 : pph = GNUNET_new (struct TALER_MERCHANT_ProductPatchHandle);
239 12 : pph->ctx = ctx;
240 12 : pph->cb = cb;
241 12 : pph->cb_cls = cb_cls;
242 : {
243 : char *path;
244 :
245 12 : GNUNET_asprintf (&path,
246 : "private/products/%s",
247 : product_id);
248 12 : pph->url = TALER_url_join (backend_url,
249 : path,
250 : NULL);
251 12 : GNUNET_free (path);
252 : }
253 12 : if (NULL == pph->url)
254 : {
255 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
256 : "Could not construct request URL.\n");
257 0 : json_decref (req_obj);
258 0 : GNUNET_free (pph);
259 0 : return NULL;
260 : }
261 : {
262 : CURL *eh;
263 :
264 12 : eh = TALER_MERCHANT_curl_easy_get_ (pph->url);
265 12 : if (GNUNET_OK !=
266 12 : TALER_curl_easy_post (&pph->post_ctx,
267 : eh,
268 : req_obj))
269 : {
270 0 : GNUNET_break (0);
271 0 : curl_easy_cleanup (eh);
272 0 : json_decref (req_obj);
273 0 : GNUNET_free (pph);
274 0 : return NULL;
275 : }
276 12 : json_decref (req_obj);
277 12 : GNUNET_assert (CURLE_OK ==
278 : curl_easy_setopt (eh,
279 : CURLOPT_CUSTOMREQUEST,
280 : MHD_HTTP_METHOD_PATCH));
281 24 : pph->job = GNUNET_CURL_job_add2 (ctx,
282 : eh,
283 12 : pph->post_ctx.headers,
284 : &handle_patch_product_finished,
285 : pph);
286 : }
287 12 : return pph;
288 : }
289 :
290 :
291 : struct TALER_MERCHANT_ProductPatchHandle *
292 6 : TALER_MERCHANT_product_patch (
293 : struct GNUNET_CURL_Context *ctx,
294 : const char *backend_url,
295 : const char *product_id,
296 : const char *description,
297 : const json_t *description_i18n,
298 : const char *unit,
299 : const struct TALER_Amount *price,
300 : const char *image,
301 : const json_t *taxes,
302 : int64_t total_stock,
303 : uint64_t total_lost,
304 : const json_t *address,
305 : struct GNUNET_TIME_Timestamp next_restock,
306 : TALER_MERCHANT_ProductPatchCallback cb,
307 : void *cb_cls)
308 : {
309 6 : return TALER_MERCHANT_product_patch2 (ctx,
310 : backend_url,
311 : product_id,
312 : description,
313 : description_i18n,
314 : unit,
315 : price,
316 : 1,
317 : image,
318 : taxes,
319 : total_stock,
320 : 0,
321 : false,
322 : NULL,
323 : total_lost,
324 : address,
325 : next_restock,
326 : cb,
327 : cb_cls);
328 : }
329 :
330 :
331 : void
332 12 : TALER_MERCHANT_product_patch_cancel (
333 : struct TALER_MERCHANT_ProductPatchHandle *pph)
334 : {
335 12 : if (NULL != pph->job)
336 : {
337 0 : GNUNET_CURL_job_cancel (pph->job);
338 0 : pph->job = NULL;
339 : }
340 12 : TALER_curl_easy_post_finished (&pph->post_ctx);
341 12 : GNUNET_free (pph->url);
342 12 : GNUNET_free (pph);
343 12 : }
344 :
345 :
346 : /* end of merchant_api_patch_product.c */
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