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/$ID request.
79 : *
80 : * @param cls the `struct TALER_MERCHANT_ProductPatchHandle`
81 : * @param response_code HTTP response code, 0 on error
82 : * @param response response body, NULL if not in JSON
83 : */
84 : static void
85 6 : handle_patch_product_finished (void *cls,
86 : long response_code,
87 : const void *response)
88 : {
89 6 : struct TALER_MERCHANT_ProductPatchHandle *pph = cls;
90 6 : const json_t *json = response;
91 6 : struct TALER_MERCHANT_HttpResponse hr = {
92 6 : .http_status = (unsigned int) response_code,
93 : .reply = json
94 : };
95 :
96 6 : pph->job = NULL;
97 6 : GNUNET_log (GNUNET_ERROR_TYPE_INFO,
98 : "PATCH /products/$ID completed with response code %u\n",
99 : (unsigned int) response_code);
100 6 : switch (response_code)
101 : {
102 0 : case 0:
103 0 : hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
104 0 : break;
105 4 : case MHD_HTTP_NO_CONTENT:
106 4 : 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 6 : pph->cb (pph->cb_cls,
154 : &hr);
155 6 : TALER_MERCHANT_product_patch_cancel (pph);
156 6 : }
157 :
158 :
159 : struct TALER_MERCHANT_ProductPatchHandle *
160 6 : TALER_MERCHANT_product_patch (
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 *price,
168 : const char *image,
169 : const json_t *taxes,
170 : int64_t total_stock,
171 : uint64_t total_lost,
172 : const json_t *address,
173 : struct GNUNET_TIME_Timestamp next_restock,
174 : TALER_MERCHANT_ProductPatchCallback cb,
175 : void *cb_cls)
176 : {
177 : struct TALER_MERCHANT_ProductPatchHandle *pph;
178 : json_t *req_obj;
179 :
180 6 : req_obj = GNUNET_JSON_PACK (
181 : /* FIXME: once we move to the new-style API,
182 : allow applications to set the product name properly! */
183 : GNUNET_JSON_pack_string ("product_name",
184 : description),
185 : GNUNET_JSON_pack_string ("description",
186 : description),
187 : GNUNET_JSON_pack_object_incref ("description_i18n",
188 : (json_t *) description_i18n),
189 : GNUNET_JSON_pack_string ("unit",
190 : unit),
191 : TALER_JSON_pack_amount ("price",
192 : price),
193 : GNUNET_JSON_pack_string ("image",
194 : image),
195 : GNUNET_JSON_pack_array_incref ("taxes",
196 : (json_t *) taxes),
197 : GNUNET_JSON_pack_uint64 ("total_stock",
198 : total_stock),
199 : GNUNET_JSON_pack_uint64 ("total_lost",
200 : total_lost),
201 : GNUNET_JSON_pack_object_incref ("address",
202 : (json_t *) address),
203 : GNUNET_JSON_pack_timestamp ("next_restock",
204 : next_restock));
205 6 : pph = GNUNET_new (struct TALER_MERCHANT_ProductPatchHandle);
206 6 : pph->ctx = ctx;
207 6 : pph->cb = cb;
208 6 : pph->cb_cls = cb_cls;
209 : {
210 : char *path;
211 :
212 6 : GNUNET_asprintf (&path,
213 : "private/products/%s",
214 : product_id);
215 6 : pph->url = TALER_url_join (backend_url,
216 : path,
217 : NULL);
218 6 : GNUNET_free (path);
219 : }
220 6 : if (NULL == pph->url)
221 : {
222 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
223 : "Could not construct request URL.\n");
224 0 : json_decref (req_obj);
225 0 : GNUNET_free (pph);
226 0 : return NULL;
227 : }
228 : {
229 : CURL *eh;
230 :
231 6 : eh = TALER_MERCHANT_curl_easy_get_ (pph->url);
232 6 : if (GNUNET_OK !=
233 6 : TALER_curl_easy_post (&pph->post_ctx,
234 : eh,
235 : req_obj))
236 : {
237 0 : GNUNET_break (0);
238 0 : curl_easy_cleanup (eh);
239 0 : json_decref (req_obj);
240 0 : GNUNET_free (pph);
241 0 : return NULL;
242 : }
243 6 : json_decref (req_obj);
244 6 : GNUNET_assert (CURLE_OK ==
245 : curl_easy_setopt (eh,
246 : CURLOPT_CUSTOMREQUEST,
247 : MHD_HTTP_METHOD_PATCH));
248 12 : pph->job = GNUNET_CURL_job_add2 (ctx,
249 : eh,
250 6 : pph->post_ctx.headers,
251 : &handle_patch_product_finished,
252 : pph);
253 : }
254 6 : return pph;
255 : }
256 :
257 :
258 : void
259 6 : TALER_MERCHANT_product_patch_cancel (
260 : struct TALER_MERCHANT_ProductPatchHandle *pph)
261 : {
262 6 : if (NULL != pph->job)
263 : {
264 0 : GNUNET_CURL_job_cancel (pph->job);
265 0 : pph->job = NULL;
266 : }
267 6 : TALER_curl_easy_post_finished (&pph->post_ctx);
268 6 : GNUNET_free (pph->url);
269 6 : GNUNET_free (pph);
270 6 : }
271 :
272 :
273 : /* end of merchant_api_patch_product.c */
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