Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2014-2018, 2020 Taler Systems SA
4 :
5 : TALER is free software; you can redistribute it and/or modify it under the
6 : terms of the GNU Lesser General Public License as published by the Free Software
7 : Foundation; either version 2.1, or (at your option) any later version.
8 :
9 : TALER is distributed in the hope that it will be useful, but WITHOUT ANY
10 : WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
11 : A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
12 :
13 : You should have received a copy of the GNU Lesser General Public License along with
14 : TALER; see the file COPYING.LGPL. If not, see
15 : <http://www.gnu.org/licenses/>
16 : */
17 : /**
18 : * @file merchant_api_get_orders.c
19 : * @brief Implementation of the GET /orders request of the merchant's HTTP API
20 : * @author Christian Grothoff
21 : */
22 : #include "platform.h"
23 : #include <curl/curl.h>
24 : #include <jansson.h>
25 : #include <microhttpd.h> /* just for HTTP status codes */
26 : #include <gnunet/gnunet_util_lib.h>
27 : #include <gnunet/gnunet_curl_lib.h>
28 : #include "taler_merchant_service.h"
29 : #include <taler/taler_json_lib.h>
30 : #include <taler/taler_signatures.h>
31 :
32 :
33 : /**
34 : * Handle for a GET /orders operation.
35 : */
36 : struct TALER_MERCHANT_OrdersGetHandle
37 : {
38 : /**
39 : * The url for this request.
40 : */
41 : char *url;
42 :
43 : /**
44 : * Handle for the request.
45 : */
46 : struct GNUNET_CURL_Job *job;
47 :
48 : /**
49 : * Function to call with the result.
50 : */
51 : TALER_MERCHANT_OrdersGetCallback cb;
52 :
53 : /**
54 : * Closure for @a cb.
55 : */
56 : void *cb_cls;
57 :
58 : /**
59 : * Reference to the execution context.
60 : */
61 : struct GNUNET_CURL_Context *ctx;
62 :
63 : };
64 :
65 :
66 : /**
67 : * Parse order information from @a ia.
68 : *
69 : * @param ia JSON array (or NULL!) with order data
70 : * @param ogh operation handle
71 : * @return #GNUNET_OK on success
72 : */
73 : static int
74 0 : parse_orders (const json_t *ia,
75 : struct TALER_MERCHANT_OrdersGetHandle *ogh)
76 0 : {
77 0 : unsigned int oes_len = json_array_size (ia);
78 0 : struct TALER_MERCHANT_OrderEntry oes[oes_len];
79 : size_t index;
80 : json_t *value;
81 : int ret;
82 :
83 0 : ret = GNUNET_OK;
84 0 : json_array_foreach (ia, index, value) {
85 0 : struct TALER_MERCHANT_OrderEntry *ie = &oes[index];
86 : struct GNUNET_JSON_Specification spec[] = {
87 0 : GNUNET_JSON_spec_string ("order_id",
88 : &ie->order_id),
89 0 : TALER_JSON_spec_absolute_time ("timestamp",
90 : &ie->timestamp),
91 0 : GNUNET_JSON_spec_uint64 ("row_id",
92 : &ie->order_serial),
93 0 : TALER_JSON_spec_amount ("amount",
94 : &ie->amount),
95 0 : GNUNET_JSON_spec_string ("summary",
96 : &ie->summary),
97 0 : GNUNET_JSON_spec_bool ("refundable",
98 : &ie->refundable),
99 0 : GNUNET_JSON_spec_bool ("paid",
100 : &ie->paid),
101 0 : GNUNET_JSON_spec_end ()
102 : };
103 :
104 0 : if (GNUNET_OK !=
105 0 : GNUNET_JSON_parse (value,
106 : spec,
107 : NULL, NULL))
108 : {
109 0 : GNUNET_break_op (0);
110 0 : ret = GNUNET_SYSERR;
111 0 : continue;
112 : }
113 0 : if (GNUNET_SYSERR == ret)
114 0 : break;
115 : }
116 0 : if (GNUNET_OK == ret)
117 : {
118 0 : struct TALER_MERCHANT_HttpResponse hr = {
119 : .http_status = MHD_HTTP_OK
120 : };
121 :
122 0 : ogh->cb (ogh->cb_cls,
123 : &hr,
124 : oes_len,
125 : oes);
126 0 : ogh->cb = NULL; /* just to be sure */
127 : }
128 0 : return ret;
129 : }
130 :
131 :
132 : /**
133 : * Function called when we're done processing the
134 : * HTTP /orders request.
135 : *
136 : * @param cls the `struct TALER_MERCHANT_OrdersGetHandle`
137 : * @param response_code HTTP response code, 0 on error
138 : * @param response response body, NULL if not in JSON
139 : */
140 : static void
141 0 : handle_get_orders_finished (void *cls,
142 : long response_code,
143 : const void *response)
144 : {
145 0 : struct TALER_MERCHANT_OrdersGetHandle *ogh = cls;
146 0 : const json_t *json = response;
147 0 : struct TALER_MERCHANT_HttpResponse hr = {
148 0 : .http_status = (unsigned int) response_code,
149 : .reply = json
150 : };
151 :
152 0 : ogh->job = NULL;
153 0 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
154 : "Got /orders response with status code %u\n",
155 : (unsigned int) response_code);
156 0 : switch (response_code)
157 : {
158 0 : case MHD_HTTP_OK:
159 : {
160 : json_t *orders;
161 : struct GNUNET_JSON_Specification spec[] = {
162 0 : GNUNET_JSON_spec_json ("orders",
163 : &orders),
164 0 : GNUNET_JSON_spec_end ()
165 : };
166 :
167 0 : if (GNUNET_OK !=
168 0 : GNUNET_JSON_parse (json,
169 : spec,
170 : NULL, NULL))
171 : {
172 0 : hr.http_status = 0;
173 0 : hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
174 : }
175 : else
176 : {
177 0 : if ( (! json_is_array (orders)) ||
178 : (GNUNET_OK ==
179 0 : parse_orders (orders,
180 : ogh)) )
181 : {
182 0 : GNUNET_JSON_parse_free (spec);
183 0 : TALER_MERCHANT_orders_get_cancel (ogh);
184 0 : return;
185 : }
186 : else
187 : {
188 0 : hr.http_status = 0;
189 0 : hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
190 : }
191 : }
192 0 : GNUNET_JSON_parse_free (spec);
193 0 : break;
194 : }
195 0 : case MHD_HTTP_NOT_FOUND:
196 0 : hr.ec = TALER_JSON_get_error_code (json);
197 0 : hr.hint = TALER_JSON_get_error_hint (json);
198 0 : break;
199 0 : default:
200 : /* unexpected response code */
201 0 : hr.ec = TALER_JSON_get_error_code (json);
202 0 : hr.hint = TALER_JSON_get_error_hint (json);
203 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
204 : "Unexpected response code %u/%d\n",
205 : (unsigned int) response_code,
206 : (int) hr.ec);
207 0 : break;
208 : }
209 0 : ogh->cb (ogh->cb_cls,
210 : &hr,
211 : 0,
212 : NULL);
213 0 : TALER_MERCHANT_orders_get_cancel (ogh);
214 : }
215 :
216 :
217 : struct TALER_MERCHANT_OrdersGetHandle *
218 0 : TALER_MERCHANT_orders_get (
219 : struct GNUNET_CURL_Context *ctx,
220 : const char *backend_url,
221 : TALER_MERCHANT_OrdersGetCallback cb,
222 : void *cb_cls)
223 : {
224 0 : return TALER_MERCHANT_orders_get2 (ctx,
225 : backend_url,
226 : TALER_EXCHANGE_YNA_ALL,
227 : TALER_EXCHANGE_YNA_ALL,
228 : TALER_EXCHANGE_YNA_ALL,
229 : GNUNET_TIME_UNIT_FOREVER_ABS,
230 : UINT64_MAX,
231 : -20, /* default is most recent 20 entries */
232 : GNUNET_TIME_UNIT_ZERO,
233 : cb,
234 : cb_cls);
235 : }
236 :
237 :
238 : struct TALER_MERCHANT_OrdersGetHandle *
239 0 : TALER_MERCHANT_orders_get2 (
240 : struct GNUNET_CURL_Context *ctx,
241 : const char *backend_url,
242 : enum TALER_EXCHANGE_YesNoAll paid,
243 : enum TALER_EXCHANGE_YesNoAll refunded,
244 : enum TALER_EXCHANGE_YesNoAll wired,
245 : struct GNUNET_TIME_Absolute date,
246 : uint64_t start_row,
247 : int64_t delta,
248 : struct GNUNET_TIME_Relative timeout,
249 : TALER_MERCHANT_OrdersGetCallback cb,
250 : void *cb_cls)
251 : {
252 : struct TALER_MERCHANT_OrdersGetHandle *ogh;
253 : CURL *eh;
254 0 : unsigned int timeout_ms = timeout.rel_value_us
255 0 : / GNUNET_TIME_UNIT_MILLISECONDS.rel_value_us;
256 :
257 0 : GNUNET_assert (NULL != backend_url);
258 0 : if (0 == delta)
259 : {
260 0 : GNUNET_break (0);
261 0 : return NULL;
262 : }
263 0 : ogh = GNUNET_new (struct TALER_MERCHANT_OrdersGetHandle);
264 0 : ogh->ctx = ctx;
265 0 : ogh->cb = cb;
266 0 : ogh->cb_cls = cb_cls;
267 :
268 : /* build ogh->url with the various optional arguments */
269 : {
270 : const char *dstr;
271 : bool have_date;
272 : bool have_srow;
273 : char cbuf[30];
274 : char dbuf[30];
275 : char tbuf[30];
276 :
277 0 : GNUNET_snprintf (tbuf,
278 : sizeof (tbuf),
279 : "%llu",
280 : (unsigned long long) timeout_ms);
281 0 : GNUNET_snprintf (dbuf,
282 : sizeof (dbuf),
283 : "%lld",
284 : (long long) delta);
285 0 : GNUNET_snprintf (cbuf,
286 : sizeof (cbuf),
287 : "%llu",
288 : (unsigned long long) start_row);
289 0 : dstr = GNUNET_STRINGS_absolute_time_to_string (date);
290 0 : if (delta > 0)
291 : {
292 0 : have_date = (0 != date.abs_value_us);
293 0 : have_srow = (0 != start_row);
294 : }
295 : else
296 : {
297 0 : have_date = (GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us !=
298 0 : date.abs_value_us);
299 0 : have_srow = (UINT64_MAX != start_row);
300 : }
301 0 : ogh->url = TALER_url_join (backend_url,
302 : "private/orders",
303 : "paid",
304 : (TALER_EXCHANGE_YNA_ALL != paid)
305 0 : ? TALER_yna_to_string (paid)
306 : : NULL,
307 : "refunded",
308 : (TALER_EXCHANGE_YNA_ALL != refunded)
309 0 : ? TALER_yna_to_string (refunded)
310 : : NULL,
311 : "wired",
312 : (TALER_EXCHANGE_YNA_ALL != wired)
313 0 : ? TALER_yna_to_string (wired)
314 : : NULL,
315 : "date",
316 : (have_date)
317 : ? dstr
318 : : NULL,
319 : "start",
320 : (have_srow)
321 : ? cbuf
322 : : NULL,
323 : "delta",
324 : (-20 != delta)
325 : ? dbuf
326 : : NULL,
327 : "timeout_ms",
328 : (0 != timeout_ms)
329 : ? tbuf
330 : : NULL,
331 : NULL);
332 : }
333 0 : if (NULL == ogh->url)
334 : {
335 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
336 : "Could not construct request URL.\n");
337 0 : GNUNET_free (ogh);
338 0 : return NULL;
339 : }
340 0 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
341 : "Requesting URL '%s'\n",
342 : ogh->url);
343 0 : eh = curl_easy_init ();
344 0 : GNUNET_assert (CURLE_OK ==
345 : curl_easy_setopt (eh,
346 : CURLOPT_URL,
347 : ogh->url));
348 0 : ogh->job = GNUNET_CURL_job_add (ctx,
349 : eh,
350 : &handle_get_orders_finished,
351 : ogh);
352 0 : return ogh;
353 : }
354 :
355 :
356 : void
357 0 : TALER_MERCHANT_orders_get_cancel (
358 : struct TALER_MERCHANT_OrdersGetHandle *ogh)
359 : {
360 0 : if (NULL != ogh->job)
361 0 : GNUNET_CURL_job_cancel (ogh->job);
362 0 : GNUNET_free (ogh->url);
363 0 : GNUNET_free (ogh);
364 0 : }
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