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/$ID request
22 : * of the merchant's HTTP API
23 : * @author Christian Grothoff
24 : */
25 : #include "platform.h"
26 : #include <curl/curl.h>
27 : #include <jansson.h>
28 : #include <microhttpd.h> /* just for HTTP status codes */
29 : #include <gnunet/gnunet_util_lib.h>
30 : #include "taler_merchant_service.h"
31 : #include "merchant_api_curl_defaults.h"
32 : #include <taler/taler_json_lib.h>
33 : #include <taler/taler_curl_lib.h>
34 :
35 :
36 : /**
37 : * Handle for a PATCH /products/$ID operation.
38 : */
39 : struct TALER_MERCHANT_ProductPatchHandle
40 : {
41 :
42 : /**
43 : * The url for this request.
44 : */
45 : char *url;
46 :
47 : /**
48 : * Handle for the request.
49 : */
50 : struct GNUNET_CURL_Job *job;
51 :
52 : /**
53 : * Function to call with the result.
54 : */
55 : TALER_MERCHANT_ProductPatchCallback cb;
56 :
57 : /**
58 : * Closure for @a cb.
59 : */
60 : void *cb_cls;
61 :
62 : /**
63 : * Reference to the execution context.
64 : */
65 : struct GNUNET_CURL_Context *ctx;
66 :
67 : /**
68 : * Minor context that holds body and headers.
69 : */
70 : struct TALER_CURL_PostContext post_ctx;
71 :
72 : };
73 :
74 :
75 : /**
76 : * Function called when we're done processing the
77 : * HTTP PATCH /products/$ID request.
78 : *
79 : * @param cls the `struct TALER_MERCHANT_ProductPatchHandle`
80 : * @param response_code HTTP response code, 0 on error
81 : * @param response response body, NULL if not in JSON
82 : */
83 : static void
84 0 : handle_patch_product_finished (void *cls,
85 : long response_code,
86 : const void *response)
87 : {
88 0 : struct TALER_MERCHANT_ProductPatchHandle *pph = cls;
89 0 : const json_t *json = response;
90 0 : struct TALER_MERCHANT_HttpResponse hr = {
91 0 : .http_status = (unsigned int) response_code,
92 : .reply = json
93 : };
94 :
95 0 : pph->job = NULL;
96 0 : GNUNET_log (GNUNET_ERROR_TYPE_INFO,
97 : "PATCH /products/$ID completed with response code %u\n",
98 : (unsigned int) response_code);
99 0 : switch (response_code)
100 : {
101 0 : case 0:
102 0 : hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
103 0 : break;
104 0 : case MHD_HTTP_NO_CONTENT:
105 0 : break;
106 0 : case MHD_HTTP_BAD_REQUEST:
107 0 : hr.ec = TALER_JSON_get_error_code (json);
108 0 : hr.hint = TALER_JSON_get_error_hint (json);
109 0 : GNUNET_break_op (0);
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 0 : break;
130 0 : case MHD_HTTP_CONFLICT:
131 0 : hr.ec = TALER_JSON_get_error_code (json);
132 0 : hr.hint = TALER_JSON_get_error_hint (json);
133 0 : break;
134 0 : case MHD_HTTP_INTERNAL_SERVER_ERROR:
135 0 : hr.ec = TALER_JSON_get_error_code (json);
136 0 : hr.hint = TALER_JSON_get_error_hint (json);
137 : /* Server had an internal issue; we should retry,
138 : but this API leaves this to the application */
139 0 : break;
140 0 : default:
141 0 : TALER_MERCHANT_parse_error_details_ (json,
142 : response_code,
143 : &hr);
144 : /* unexpected response code */
145 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
146 : "Unexpected response code %u/%d\n",
147 : (unsigned int) response_code,
148 : (int) hr.ec);
149 0 : GNUNET_break_op (0);
150 0 : break;
151 : }
152 0 : pph->cb (pph->cb_cls,
153 : &hr);
154 0 : TALER_MERCHANT_product_patch_cancel (pph);
155 0 : }
156 :
157 :
158 : struct TALER_MERCHANT_ProductPatchHandle *
159 0 : TALER_MERCHANT_product_patch (
160 : struct GNUNET_CURL_Context *ctx,
161 : const char *backend_url,
162 : const char *product_id,
163 : const char *description,
164 : const json_t *description_i18n,
165 : const char *unit,
166 : const struct TALER_Amount *price,
167 : const char *image,
168 : const json_t *taxes,
169 : int64_t total_stock,
170 : uint64_t total_lost,
171 : const json_t *address,
172 : struct GNUNET_TIME_Timestamp next_restock,
173 : TALER_MERCHANT_ProductPatchCallback cb,
174 : void *cb_cls)
175 : {
176 : struct TALER_MERCHANT_ProductPatchHandle *pph;
177 : json_t *req_obj;
178 :
179 0 : req_obj = GNUNET_JSON_PACK (
180 : GNUNET_JSON_pack_string ("description",
181 : description),
182 : GNUNET_JSON_pack_object_incref ("description_i18n",
183 : (json_t *) description_i18n),
184 : GNUNET_JSON_pack_string ("unit",
185 : unit),
186 : TALER_JSON_pack_amount ("price",
187 : price),
188 : GNUNET_JSON_pack_string ("image",
189 : image),
190 : GNUNET_JSON_pack_array_incref ("taxes",
191 : (json_t *) taxes),
192 : GNUNET_JSON_pack_uint64 ("total_stock",
193 : total_stock),
194 : GNUNET_JSON_pack_uint64 ("total_lost",
195 : total_lost),
196 : GNUNET_JSON_pack_object_incref ("address",
197 : (json_t *) address),
198 : GNUNET_JSON_pack_timestamp ("next_restock",
199 : next_restock));
200 0 : pph = GNUNET_new (struct TALER_MERCHANT_ProductPatchHandle);
201 0 : pph->ctx = ctx;
202 0 : pph->cb = cb;
203 0 : pph->cb_cls = cb_cls;
204 : {
205 : char *path;
206 :
207 0 : GNUNET_asprintf (&path,
208 : "private/products/%s",
209 : product_id);
210 0 : pph->url = TALER_url_join (backend_url,
211 : path,
212 : NULL);
213 0 : GNUNET_free (path);
214 : }
215 0 : if (NULL == pph->url)
216 : {
217 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
218 : "Could not construct request URL.\n");
219 0 : json_decref (req_obj);
220 0 : GNUNET_free (pph);
221 0 : return NULL;
222 : }
223 : {
224 : CURL *eh;
225 :
226 0 : eh = TALER_MERCHANT_curl_easy_get_ (pph->url);
227 0 : if (GNUNET_OK !=
228 0 : TALER_curl_easy_post (&pph->post_ctx,
229 : eh,
230 : req_obj))
231 : {
232 0 : GNUNET_break (0);
233 0 : curl_easy_cleanup (eh);
234 0 : json_decref (req_obj);
235 0 : GNUNET_free (pph);
236 0 : return NULL;
237 : }
238 0 : json_decref (req_obj);
239 0 : GNUNET_assert (CURLE_OK ==
240 : curl_easy_setopt (eh,
241 : CURLOPT_CUSTOMREQUEST,
242 : MHD_HTTP_METHOD_PATCH));
243 0 : pph->job = GNUNET_CURL_job_add2 (ctx,
244 : eh,
245 0 : pph->post_ctx.headers,
246 : &handle_patch_product_finished,
247 : pph);
248 : }
249 0 : return pph;
250 : }
251 :
252 :
253 : void
254 0 : TALER_MERCHANT_product_patch_cancel (
255 : struct TALER_MERCHANT_ProductPatchHandle *pph)
256 : {
257 0 : if (NULL != pph->job)
258 : {
259 0 : GNUNET_CURL_job_cancel (pph->job);
260 0 : pph->job = NULL;
261 : }
262 0 : TALER_curl_easy_post_finished (&pph->post_ctx);
263 0 : GNUNET_free (pph->url);
264 0 : GNUNET_free (pph);
265 0 : }
266 :
267 :
268 : /* end of merchant_api_patch_product.c */
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