Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2014-2023 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 54 : handle_post_order_claim_finished (void *cls,
85 : long response_code,
86 : const void *response)
87 : {
88 54 : struct TALER_MERCHANT_OrderClaimHandle *och = cls;
89 54 : const json_t *json = response;
90 54 : struct TALER_MERCHANT_OrderClaimResponse ocr = {
91 54 : .hr.http_status = (unsigned int) response_code,
92 : .hr.reply = json
93 : };
94 : struct GNUNET_JSON_Specification spec[] = {
95 54 : GNUNET_JSON_spec_object_const (
96 : "contract_terms",
97 : &ocr.details.ok.contract_terms),
98 54 : GNUNET_JSON_spec_fixed_auto (
99 : "sig",
100 : &ocr.details.ok.sig),
101 54 : GNUNET_JSON_spec_end ()
102 : };
103 :
104 54 : och->job = NULL;
105 54 : GNUNET_log (GNUNET_ERROR_TYPE_INFO,
106 : "Order claimed with status %u\n",
107 : (unsigned int) response_code);
108 :
109 54 : if (MHD_HTTP_OK != response_code)
110 : {
111 4 : ocr.hr.ec = TALER_JSON_get_error_code (json);
112 4 : ocr.hr.hint = TALER_JSON_get_error_hint (json);
113 4 : GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
114 : "Proposal lookup failed with HTTP status code %u/%d\n",
115 : (unsigned int) response_code,
116 : (int) ocr.hr.ec);
117 4 : och->cb (och->cb_cls,
118 : &ocr);
119 4 : TALER_MERCHANT_order_claim_cancel (och);
120 4 : return;
121 : }
122 :
123 50 : if (GNUNET_OK !=
124 50 : GNUNET_JSON_parse (json,
125 : spec,
126 : NULL, NULL))
127 : {
128 0 : GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
129 : "Claiming order failed: could not parse JSON response\n");
130 0 : GNUNET_break_op (0);
131 0 : ocr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
132 0 : ocr.hr.http_status = 0;
133 0 : och->cb (och->cb_cls,
134 : &ocr);
135 0 : TALER_MERCHANT_order_claim_cancel (och);
136 0 : return;
137 : }
138 :
139 50 : if (GNUNET_OK !=
140 50 : TALER_JSON_contract_hash (ocr.details.ok.contract_terms,
141 : &ocr.details.ok.h_contract_terms))
142 : {
143 0 : GNUNET_break (0);
144 0 : ocr.hr.ec = TALER_EC_MERCHANT_POST_ORDERS_ID_CLAIM_CLIENT_INTERNAL_FAILURE;
145 0 : ocr.hr.http_status = 0;
146 0 : GNUNET_JSON_parse_free (spec);
147 0 : och->cb (och->cb_cls,
148 : &ocr);
149 0 : TALER_MERCHANT_order_claim_cancel (och);
150 0 : return;
151 : }
152 50 : och->cb (och->cb_cls,
153 : &ocr);
154 50 : GNUNET_JSON_parse_free (spec);
155 50 : TALER_MERCHANT_order_claim_cancel (och);
156 : }
157 :
158 :
159 : struct TALER_MERCHANT_OrderClaimHandle *
160 54 : TALER_MERCHANT_order_claim (struct GNUNET_CURL_Context *ctx,
161 : const char *backend_url,
162 : const char *order_id,
163 : const struct GNUNET_CRYPTO_EddsaPublicKey *nonce,
164 : const struct TALER_ClaimTokenP *claim_token,
165 : TALER_MERCHANT_OrderClaimCallback cb,
166 : void *cb_cls)
167 : {
168 : struct TALER_MERCHANT_OrderClaimHandle *och;
169 : json_t *req_obj;
170 :
171 54 : if (NULL == order_id)
172 : {
173 0 : GNUNET_break (0);
174 0 : return NULL;
175 : }
176 54 : req_obj = GNUNET_JSON_PACK (
177 : GNUNET_JSON_pack_data_auto ("nonce",
178 : nonce),
179 : GNUNET_JSON_pack_allow_null (
180 : GNUNET_JSON_pack_data_auto ("token",
181 : claim_token)));
182 54 : och = GNUNET_new (struct TALER_MERCHANT_OrderClaimHandle);
183 54 : och->ctx = ctx;
184 54 : och->cb = cb;
185 54 : och->cb_cls = cb_cls;
186 : {
187 : char *path;
188 :
189 54 : GNUNET_asprintf (&path,
190 : "orders/%s/claim",
191 : order_id);
192 54 : och->url = TALER_url_join (backend_url,
193 : path,
194 : NULL);
195 54 : GNUNET_free (path);
196 : }
197 54 : if (NULL == och->url)
198 : {
199 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
200 : "Could not construct request URL.\n");
201 0 : json_decref (req_obj);
202 0 : GNUNET_free (och);
203 0 : return NULL;
204 : }
205 54 : GNUNET_log (GNUNET_ERROR_TYPE_INFO,
206 : "Claiming order at %s\n",
207 : och->url);
208 : {
209 : CURL *eh;
210 :
211 54 : eh = TALER_MERCHANT_curl_easy_get_ (och->url);
212 54 : GNUNET_assert (GNUNET_OK ==
213 : TALER_curl_easy_post (&och->post_ctx,
214 : eh,
215 : req_obj));
216 54 : json_decref (req_obj);
217 108 : och->job = GNUNET_CURL_job_add2 (ctx,
218 : eh,
219 54 : och->post_ctx.headers,
220 : &handle_post_order_claim_finished,
221 : och);
222 54 : GNUNET_assert (NULL != och->job);
223 : }
224 54 : return och;
225 : }
226 :
227 :
228 : void
229 54 : TALER_MERCHANT_order_claim_cancel (struct TALER_MERCHANT_OrderClaimHandle *och)
230 : {
231 54 : if (NULL != och->job)
232 : {
233 0 : GNUNET_CURL_job_cancel (och->job);
234 0 : och->job = NULL;
235 : }
236 54 : TALER_curl_easy_post_finished (&och->post_ctx);
237 54 : GNUNET_free (och->url);
238 54 : GNUNET_free (och);
239 54 : }
240 :
241 :
242 : /* end of merchant_api_post_order_claim.c */
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