Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2014-2021 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, but
11 : 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 Public
16 : License along with TALER; see the file COPYING.LGPL. If not,
17 : see <http://www.gnu.org/licenses/>
18 : */
19 : /**
20 : * @file merchant_api_post_order_claim.c
21 : * @brief Implementation of POST /orders/$ID/claim
22 : * @author Christian Grothoff
23 : * @author Marcello Stanisci
24 : */
25 : #include "platform.h"
26 : #include <curl/curl.h>
27 : #include <jansson.h>
28 : #include <microhttpd.h> /* just for HTTP status codes */
29 : #include <gnunet/gnunet_util_lib.h>
30 : #include <gnunet/gnunet_curl_lib.h>
31 : #include "taler_merchant_service.h"
32 : #include "merchant_api_curl_defaults.h"
33 : #include <taler/taler_json_lib.h>
34 : #include <taler/taler_signatures.h>
35 : #include <taler/taler_curl_lib.h>
36 :
37 :
38 : /**
39 : * Structure representing a POST /orders/$ID/claim operation.
40 : */
41 : struct TALER_MERCHANT_OrderClaimHandle
42 : {
43 : /**
44 : * Full URL, includes "/orders/$ID/claim".
45 : */
46 : char *url;
47 :
48 : /**
49 : * Handle for the request.
50 : */
51 : struct GNUNET_CURL_Job *job;
52 :
53 : /**
54 : * Function to call with the result.
55 : */
56 : TALER_MERCHANT_OrderClaimCallback cb;
57 :
58 : /**
59 : * Closure for @a cb.
60 : */
61 : void *cb_cls;
62 :
63 : /**
64 : * Reference to the execution context.
65 : */
66 : struct GNUNET_CURL_Context *ctx;
67 :
68 : /**
69 : * Minor context that holds body and headers.
70 : */
71 : struct TALER_CURL_PostContext post_ctx;
72 : };
73 :
74 :
75 : /**
76 : * Function called when we're done processing the
77 : * POST /orders/$ID/claim request.
78 : *
79 : * @param cls the `struct TALER_MERCHANT_OrderClaimHandle`
80 : * @param response_code HTTP response code, 0 on error
81 : * @param response response body, should be NULL
82 : */
83 : static void
84 0 : handle_post_order_claim_finished (void *cls,
85 : long response_code,
86 : const void *response)
87 : {
88 0 : struct TALER_MERCHANT_OrderClaimHandle *och = cls;
89 : json_t *contract_terms;
90 : struct TALER_MerchantSignatureP sig;
91 : struct TALER_PrivateContractHashP hash;
92 0 : const json_t *json = response;
93 : struct GNUNET_JSON_Specification spec[] = {
94 0 : GNUNET_JSON_spec_json ("contract_terms",
95 : &contract_terms),
96 0 : GNUNET_JSON_spec_fixed_auto ("sig",
97 : &sig),
98 0 : GNUNET_JSON_spec_end ()
99 : };
100 0 : struct TALER_MERCHANT_HttpResponse hr = {
101 0 : .http_status = (unsigned int) response_code,
102 : .reply = json
103 : };
104 :
105 0 : och->job = NULL;
106 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
107 : "Order claimed with status %u\n",
108 : (unsigned int) response_code);
109 :
110 0 : if (MHD_HTTP_OK != response_code)
111 : {
112 0 : hr.ec = TALER_JSON_get_error_code (json);
113 0 : hr.hint = TALER_JSON_get_error_hint (json);
114 0 : GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
115 : "Proposal lookup failed with HTTP status code %u/%d\n",
116 : (unsigned int) response_code,
117 : (int) hr.ec);
118 0 : och->cb (och->cb_cls,
119 : &hr,
120 : NULL,
121 : NULL,
122 : NULL);
123 0 : TALER_MERCHANT_order_claim_cancel (och);
124 0 : return;
125 : }
126 :
127 0 : if (GNUNET_OK !=
128 0 : GNUNET_JSON_parse (json,
129 : spec,
130 : NULL, NULL))
131 : {
132 0 : GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
133 : "Claiming order failed: could not parse JSON response\n");
134 0 : GNUNET_break_op (0);
135 0 : hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
136 0 : hr.http_status = 0;
137 0 : och->cb (och->cb_cls,
138 : &hr,
139 : NULL,
140 : NULL,
141 : NULL);
142 0 : TALER_MERCHANT_order_claim_cancel (och);
143 0 : return;
144 : }
145 :
146 0 : if (GNUNET_OK !=
147 0 : TALER_JSON_contract_hash (contract_terms,
148 : &hash))
149 : {
150 0 : GNUNET_break (0);
151 0 : hr.ec = TALER_EC_MERCHANT_POST_ORDERS_ID_CLAIM_CLIENT_INTERNAL_FAILURE;
152 0 : hr.http_status = 0;
153 0 : GNUNET_JSON_parse_free (spec);
154 0 : och->cb (och->cb_cls,
155 : &hr,
156 : NULL,
157 : NULL,
158 : NULL);
159 0 : TALER_MERCHANT_order_claim_cancel (och);
160 0 : return;
161 : }
162 :
163 0 : och->cb (och->cb_cls,
164 : &hr,
165 : contract_terms,
166 : &sig,
167 : &hash);
168 0 : GNUNET_JSON_parse_free (spec);
169 0 : TALER_MERCHANT_order_claim_cancel (och);
170 : }
171 :
172 :
173 : struct TALER_MERCHANT_OrderClaimHandle *
174 0 : TALER_MERCHANT_order_claim (struct GNUNET_CURL_Context *ctx,
175 : const char *backend_url,
176 : const char *order_id,
177 : const struct GNUNET_CRYPTO_EddsaPublicKey *nonce,
178 : const struct TALER_ClaimTokenP *claim_token,
179 : TALER_MERCHANT_OrderClaimCallback cb,
180 : void *cb_cls)
181 : {
182 : struct TALER_MERCHANT_OrderClaimHandle *och;
183 : json_t *req_obj;
184 :
185 0 : if (NULL == order_id)
186 : {
187 0 : GNUNET_break (0);
188 0 : return NULL;
189 : }
190 0 : req_obj = GNUNET_JSON_PACK (
191 : GNUNET_JSON_pack_data_auto ("nonce",
192 : nonce),
193 : GNUNET_JSON_pack_allow_null (
194 : GNUNET_JSON_pack_data_auto ("token",
195 : claim_token)));
196 0 : och = GNUNET_new (struct TALER_MERCHANT_OrderClaimHandle);
197 0 : och->ctx = ctx;
198 0 : och->cb = cb;
199 0 : och->cb_cls = cb_cls;
200 : {
201 : char *path;
202 :
203 0 : GNUNET_asprintf (&path,
204 : "orders/%s/claim",
205 : order_id);
206 0 : och->url = TALER_url_join (backend_url,
207 : path,
208 : NULL);
209 0 : GNUNET_free (path);
210 : }
211 0 : if (NULL == och->url)
212 : {
213 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
214 : "Could not construct request URL.\n");
215 0 : json_decref (req_obj);
216 0 : GNUNET_free (och);
217 0 : return NULL;
218 : }
219 0 : GNUNET_log (GNUNET_ERROR_TYPE_INFO,
220 : "Claiming order at %s\n",
221 : och->url);
222 : {
223 : CURL *eh;
224 :
225 0 : eh = TALER_MERCHANT_curl_easy_get_ (och->url);
226 0 : GNUNET_assert (GNUNET_OK ==
227 : TALER_curl_easy_post (&och->post_ctx,
228 : eh,
229 : req_obj));
230 0 : json_decref (req_obj);
231 0 : och->job = GNUNET_CURL_job_add2 (ctx,
232 : eh,
233 0 : och->post_ctx.headers,
234 : &handle_post_order_claim_finished,
235 : och);
236 0 : GNUNET_assert (NULL != och->job);
237 : }
238 0 : return och;
239 : }
240 :
241 :
242 : void
243 0 : TALER_MERCHANT_order_claim_cancel (struct TALER_MERCHANT_OrderClaimHandle *och)
244 : {
245 0 : if (NULL != och->job)
246 : {
247 0 : GNUNET_CURL_job_cancel (och->job);
248 0 : och->job = NULL;
249 : }
250 0 : TALER_curl_easy_post_finished (&och->post_ctx);
251 0 : GNUNET_free (och->url);
252 0 : GNUNET_free (och);
253 0 : }
254 :
255 :
256 : /* end of merchant_api_post_order_claim.c */
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