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_post_order_paid.c
21 : * @brief Implementation of the POST /order/$ID/paid request
22 : * of the merchant's HTTP API
23 : * @author Jonathan Buchanan
24 : */
25 : #include "platform.h"
26 : #include <curl/curl.h>
27 : #include <jansson.h>
28 : #include <microhttpd.h> /* just for HTTP status codes */
29 : #include <gnunet/gnunet_util_lib.h>
30 : #include <gnunet/gnunet_curl_lib.h>
31 : #include "taler_merchant_service.h"
32 : #include "merchant_api_curl_defaults.h"
33 : #include <taler/taler_json_lib.h>
34 : #include <taler/taler_signatures.h>
35 : #include <taler/taler_exchange_service.h>
36 : #include <taler/taler_curl_lib.h>
37 :
38 :
39 : /**
40 : * @brief Handle to a POST /orders/$ID/paid operation at a merchant.
41 : */
42 : struct TALER_MERCHANT_OrderPaidHandle
43 : {
44 :
45 : /**
46 : * The url for this request.
47 : */
48 : char *url;
49 :
50 : /**
51 : * Handle for the request.
52 : */
53 : struct GNUNET_CURL_Job *job;
54 :
55 : /**
56 : * Function to call with the result.
57 : */
58 : TALER_MERCHANT_OrderPaidCallback paid_cb;
59 :
60 : /**
61 : * Closure for @a paid_cb.
62 : */
63 : void *paid_cb_cls;
64 :
65 : /**
66 : * Reference to the execution context.
67 : */
68 : struct GNUNET_CURL_Context *ctx;
69 :
70 : /**
71 : * Minor context that holds body and headers.
72 : */
73 : struct TALER_CURL_PostContext post_ctx;
74 : };
75 :
76 :
77 : /**
78 : * Function called when we're done processing the
79 : * HTTP /paid request.
80 : *
81 : * @param cls the `struct TALER_MERCHANT_OrderPaidHandle`
82 : * @param response_code HTTP response code, 0 on error
83 : * @param response response body, NULL if not in JSON
84 : */
85 : static void
86 0 : handle_paid_finished (void *cls,
87 : long response_code,
88 : const void *response)
89 : {
90 0 : struct TALER_MERCHANT_OrderPaidHandle *oph = cls;
91 0 : const json_t *json = response;
92 0 : struct TALER_MERCHANT_HttpResponse hr = {
93 0 : .http_status = (unsigned int) response_code,
94 : .reply = json
95 : };
96 :
97 0 : oph->job = NULL;
98 0 : GNUNET_log (GNUNET_ERROR_TYPE_INFO,
99 : "/paid completed with response code %u\n",
100 : (unsigned int) response_code);
101 0 : switch (response_code)
102 : {
103 0 : case 0:
104 0 : hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
105 0 : break;
106 0 : case MHD_HTTP_NO_CONTENT:
107 0 : break;
108 0 : case MHD_HTTP_BAD_REQUEST:
109 0 : hr.ec = TALER_JSON_get_error_code (json);
110 0 : hr.hint = TALER_JSON_get_error_hint (json);
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_FORBIDDEN:
116 0 : hr.ec = TALER_JSON_get_error_code (json);
117 0 : hr.hint = TALER_JSON_get_error_hint (json);
118 : /* The signature provided was invalid */
119 0 : break;
120 0 : case MHD_HTTP_NOT_FOUND:
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, this should never
124 : happen, we should pass the JSON reply to the
125 : application */
126 0 : break;
127 0 : case MHD_HTTP_CONFLICT:
128 0 : hr.ec = TALER_JSON_get_error_code (json);
129 0 : hr.hint = TALER_JSON_get_error_hint (json);
130 : /* The hashed contract terms don't match with the order_id. */
131 0 : break;
132 0 : case MHD_HTTP_INTERNAL_SERVER_ERROR:
133 0 : hr.ec = TALER_JSON_get_error_code (json);
134 0 : hr.hint = TALER_JSON_get_error_hint (json);
135 : /* Server had an internal issue; we should retry,
136 : but this API leaves this to the application */
137 0 : break;
138 0 : case MHD_HTTP_SERVICE_UNAVAILABLE:
139 0 : TALER_MERCHANT_parse_error_details_ (json,
140 : response_code,
141 : &hr);
142 : /* Exchange couldn't respond properly; the retry is
143 : left to the application */
144 0 : break;
145 0 : default:
146 0 : TALER_MERCHANT_parse_error_details_ (json,
147 : response_code,
148 : &hr);
149 : /* unexpected response code */
150 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
151 : "Unexpected response code %u/%d\n",
152 : (unsigned int) response_code,
153 : (int) hr.ec);
154 0 : GNUNET_break_op (0);
155 0 : break;
156 : }
157 0 : oph->paid_cb (oph->paid_cb_cls,
158 : &hr);
159 0 : TALER_MERCHANT_order_paid_cancel (oph);
160 0 : }
161 :
162 :
163 : struct TALER_MERCHANT_OrderPaidHandle *
164 0 : TALER_MERCHANT_order_paid (
165 : struct GNUNET_CURL_Context *ctx,
166 : const char *merchant_url,
167 : const char *order_id,
168 : const char *session_id,
169 : const struct TALER_PrivateContractHashP *h_contract_terms,
170 : const struct TALER_MerchantSignatureP *merchant_sig,
171 : TALER_MERCHANT_OrderPaidCallback paid_cb,
172 : void *paid_cb_cls)
173 : {
174 : struct TALER_MERCHANT_OrderPaidHandle *oph;
175 : json_t *req_obj;
176 :
177 0 : req_obj = GNUNET_JSON_PACK (
178 : GNUNET_JSON_pack_data_auto ("sig",
179 : merchant_sig),
180 : GNUNET_JSON_pack_data_auto ("h_contract",
181 : h_contract_terms),
182 : GNUNET_JSON_pack_string ("session_id",
183 : session_id));
184 0 : oph = GNUNET_new (struct TALER_MERCHANT_OrderPaidHandle);
185 0 : oph->ctx = ctx;
186 0 : oph->paid_cb = paid_cb;
187 0 : oph->paid_cb_cls = paid_cb_cls;
188 : {
189 : char *path;
190 :
191 0 : GNUNET_asprintf (&path,
192 : "orders/%s/paid",
193 : order_id);
194 0 : oph->url = TALER_url_join (merchant_url,
195 : path,
196 : NULL);
197 0 : GNUNET_free (path);
198 : }
199 0 : if (NULL == oph->url)
200 : {
201 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
202 : "Could not construct request URL.\n");
203 0 : json_decref (req_obj);
204 0 : GNUNET_free (oph);
205 0 : return NULL;
206 : }
207 : {
208 : CURL *eh;
209 :
210 0 : eh = TALER_MERCHANT_curl_easy_get_ (oph->url);
211 0 : if (GNUNET_OK !=
212 0 : TALER_curl_easy_post (&oph->post_ctx,
213 : eh,
214 : req_obj))
215 : {
216 0 : GNUNET_break (0);
217 0 : curl_easy_cleanup (eh);
218 0 : json_decref (req_obj);
219 0 : GNUNET_free (oph);
220 0 : return NULL;
221 : }
222 0 : json_decref (req_obj);
223 0 : oph->job = GNUNET_CURL_job_add2 (ctx,
224 : eh,
225 0 : oph->post_ctx.headers,
226 : &handle_paid_finished,
227 : oph);
228 : }
229 0 : return oph;
230 : }
231 :
232 :
233 : void
234 0 : TALER_MERCHANT_order_paid_cancel (
235 : struct TALER_MERCHANT_OrderPaidHandle *oph)
236 : {
237 0 : if (NULL != oph->job)
238 : {
239 0 : GNUNET_CURL_job_cancel (oph->job);
240 0 : oph->job = NULL;
241 : }
242 0 : TALER_curl_easy_post_finished (&oph->post_ctx);
243 0 : GNUNET_free (oph->url);
244 0 : GNUNET_free (oph);
245 0 : }
246 :
247 :
248 : /* end of merchant_api_post_order_paid.c */
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