Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2020 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 <taler/taler_json_lib.h>
32 : #include <taler/taler_curl_lib.h>
33 :
34 :
35 : /**
36 : * Handle for a POST /products/$ID operation.
37 : */
38 : struct TALER_MERCHANT_ProductsPostHandle
39 : {
40 :
41 : /**
42 : * The url for this request.
43 : */
44 : char *url;
45 :
46 : /**
47 : * Handle for the request.
48 : */
49 : struct GNUNET_CURL_Job *job;
50 :
51 : /**
52 : * Function to call with the result.
53 : */
54 : TALER_MERCHANT_ProductsPostCallback cb;
55 :
56 : /**
57 : * Closure for @a cb.
58 : */
59 : void *cb_cls;
60 :
61 : /**
62 : * Reference to the execution context.
63 : */
64 : struct GNUNET_CURL_Context *ctx;
65 :
66 : /**
67 : * Minor context that holds body and headers.
68 : */
69 : struct TALER_CURL_PostContext post_ctx;
70 :
71 : };
72 :
73 :
74 : /**
75 : * Function called when we're done processing the
76 : * HTTP POST /products request.
77 : *
78 : * @param cls the `struct TALER_MERCHANT_ProductsPostHandle`
79 : * @param response_code HTTP response code, 0 on error
80 : * @param response response body, NULL if not in JSON
81 : */
82 : static void
83 0 : handle_post_products_finished (void *cls,
84 : long response_code,
85 : const void *response)
86 : {
87 0 : struct TALER_MERCHANT_ProductsPostHandle *pph = cls;
88 0 : const json_t *json = response;
89 0 : struct TALER_MERCHANT_HttpResponse hr = {
90 0 : .http_status = (unsigned int) response_code,
91 : .reply = json
92 : };
93 :
94 0 : pph->job = NULL;
95 0 : GNUNET_log (GNUNET_ERROR_TYPE_INFO,
96 : "POST /products completed with response code %u\n",
97 : (unsigned int) response_code);
98 0 : switch (response_code)
99 : {
100 0 : case 0:
101 0 : hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
102 0 : break;
103 0 : case MHD_HTTP_NO_CONTENT:
104 0 : break;
105 0 : case MHD_HTTP_BAD_REQUEST:
106 0 : hr.ec = TALER_JSON_get_error_code (json);
107 0 : hr.hint = TALER_JSON_get_error_hint (json);
108 : /* This should never happen, either us
109 : * or the merchant is buggy (or API version conflict);
110 : * just pass JSON reply to the application */
111 0 : break;
112 0 : case MHD_HTTP_FORBIDDEN:
113 0 : hr.ec = TALER_JSON_get_error_code (json);
114 0 : hr.hint = TALER_JSON_get_error_hint (json);
115 : /* Nothing really to verify, merchant says we tried to abort the payment
116 : * after it was successful. We should pass the JSON reply to the
117 : * application */
118 0 : break;
119 0 : case MHD_HTTP_NOT_FOUND:
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, this should never
123 : happen, we should pass the JSON reply to the
124 : application */
125 0 : break;
126 0 : case MHD_HTTP_CONFLICT:
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_INTERNAL_SERVER_ERROR:
131 0 : hr.ec = TALER_JSON_get_error_code (json);
132 0 : hr.hint = TALER_JSON_get_error_hint (json);
133 : /* Server had an internal issue; we should retry,
134 : but this API leaves this to the application */
135 0 : break;
136 0 : default:
137 0 : TALER_MERCHANT_parse_error_details_ (json,
138 : response_code,
139 : &hr);
140 : /* unexpected response code */
141 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
142 : "Unexpected response code %u/%d\n",
143 : (unsigned int) response_code,
144 : (int) hr.ec);
145 0 : GNUNET_break_op (0);
146 0 : break;
147 : }
148 0 : pph->cb (pph->cb_cls,
149 : &hr);
150 0 : TALER_MERCHANT_products_post_cancel (pph);
151 0 : }
152 :
153 :
154 : struct TALER_MERCHANT_ProductsPostHandle *
155 0 : TALER_MERCHANT_products_post (
156 : struct GNUNET_CURL_Context *ctx,
157 : const char *backend_url,
158 : const char *product_id,
159 : const char *description,
160 : const json_t *description_i18n,
161 : const char *unit,
162 : const struct TALER_Amount *price,
163 : const json_t *image,
164 : const json_t *taxes,
165 : int64_t total_stock,
166 : const json_t *address,
167 : struct GNUNET_TIME_Absolute next_restock,
168 : TALER_MERCHANT_ProductsPostCallback cb,
169 : void *cb_cls)
170 : {
171 : struct TALER_MERCHANT_ProductsPostHandle *pph;
172 : json_t *req_obj;
173 :
174 0 : (void) GNUNET_TIME_round_abs (&next_restock);
175 0 : req_obj = json_pack ("{s:s, s:s, s:O, s:s, s:o,"
176 : " s:O, s:O, s:I, s:O, s:o}",
177 : "product_id",
178 : product_id,
179 : "description",
180 : description,
181 : "description_i18n",
182 : description_i18n,
183 : "unit",
184 : unit,
185 : "price",
186 : TALER_JSON_from_amount (price),
187 : /* End of first group of 5 */
188 : "image",
189 : image,
190 : "taxes",
191 : taxes,
192 : "total_stock",
193 : (json_int_t) total_stock,
194 : "address",
195 : address,
196 : "next_restock",
197 : GNUNET_JSON_from_time_abs (next_restock));
198 0 : if (NULL == req_obj)
199 : {
200 0 : GNUNET_break (0);
201 0 : return NULL;
202 : }
203 0 : pph = GNUNET_new (struct TALER_MERCHANT_ProductsPostHandle);
204 0 : pph->ctx = ctx;
205 0 : pph->cb = cb;
206 0 : pph->cb_cls = cb_cls;
207 0 : pph->url = TALER_url_join (backend_url,
208 : "private/products",
209 : NULL);
210 0 : if (NULL == pph->url)
211 : {
212 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
213 : "Could not construct request URL.\n");
214 0 : json_decref (req_obj);
215 0 : GNUNET_free (pph);
216 0 : return NULL;
217 : }
218 : {
219 : CURL *eh;
220 :
221 0 : eh = curl_easy_init ();
222 0 : GNUNET_assert (NULL != eh);
223 0 : GNUNET_assert (GNUNET_OK ==
224 : TALER_curl_easy_post (&pph->post_ctx,
225 : eh,
226 : req_obj));
227 0 : json_decref (req_obj);
228 0 : GNUNET_assert (CURLE_OK == curl_easy_setopt (eh,
229 : CURLOPT_URL,
230 : pph->url));
231 0 : pph->job = GNUNET_CURL_job_add2 (ctx,
232 : eh,
233 0 : pph->post_ctx.headers,
234 : &handle_post_products_finished,
235 : pph);
236 0 : GNUNET_assert (NULL != pph->job);
237 : }
238 0 : return pph;
239 : }
240 :
241 :
242 : void
243 0 : TALER_MERCHANT_products_post_cancel (
244 : struct TALER_MERCHANT_ProductsPostHandle *pph)
245 : {
246 0 : if (NULL != pph->job)
247 : {
248 0 : GNUNET_CURL_job_cancel (pph->job);
249 0 : pph->job = NULL;
250 : }
251 0 : TALER_curl_easy_post_finished (&pph->post_ctx);
252 0 : GNUNET_free (pph->url);
253 0 : GNUNET_free (pph);
254 0 : }
255 :
256 :
257 : /* end of merchant_api_post_products.c */
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