Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2014, 2015, 2016, 2020 Taler Systems SA
4 :
5 : TALER is free software; you can redistribute it and/or modify it under the
6 : terms of the GNU Lesser General Public License as published by the Free Software
7 : Foundation; either version 2.1, or (at your option) any later version.
8 :
9 : TALER is distributed in the hope that it will be useful, but WITHOUT ANY
10 : WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
11 : A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
12 :
13 : You should have received a copy of the GNU Lesser General Public License along with
14 : TALER; see the file COPYING.LGPL. If not, see
15 : <http://www.gnu.org/licenses/>
16 : */
17 : /**
18 : * @file merchant_api_post_reserves.c
19 : * @brief Implementation of the POST /reserves request of the merchant's HTTP API
20 : * @author Marcello Stanisci
21 : * @author Christian Grothoff
22 : */
23 : #include "platform.h"
24 : #include <curl/curl.h>
25 : #include <jansson.h>
26 : #include <microhttpd.h> /* just for HTTP status codes */
27 : #include <gnunet/gnunet_util_lib.h>
28 : #include "taler_merchant_service.h"
29 : #include "merchant_api_curl_defaults.h"
30 : #include <taler/taler_curl_lib.h>
31 : #include <taler/taler_json_lib.h>
32 :
33 :
34 : /**
35 : * @brief A handle for POSTing reserve data.
36 : */
37 : struct TALER_MERCHANT_PostReservesHandle
38 : {
39 :
40 : /**
41 : * The url for this request.
42 : */
43 : char *url;
44 :
45 : /**
46 : * Handle for the request.
47 : */
48 : struct GNUNET_CURL_Job *job;
49 :
50 : /**
51 : * Function to call with the result.
52 : */
53 : TALER_MERCHANT_PostReservesCallback cb;
54 :
55 : /**
56 : * Closure for @a cb.
57 : */
58 : void *cb_cls;
59 :
60 : /**
61 : * Reference to the execution context.
62 : */
63 : struct GNUNET_CURL_Context *ctx;
64 :
65 : /**
66 : * Minor context that holds body and headers.
67 : */
68 : struct TALER_CURL_PostContext post_ctx;
69 :
70 : };
71 :
72 :
73 : /**
74 : * Function called when we're done processing the
75 : * HTTP POST /reserves request.
76 : *
77 : * @param cls the `struct TALER_MERCHANT_PostReservesHandle`
78 : * @param response_code HTTP response code, 0 on error
79 : * @param response response body, NULL if not in JSON
80 : */
81 : static void
82 0 : handle_post_reserves_finished (void *cls,
83 : long response_code,
84 : const void *response)
85 : {
86 0 : struct TALER_MERCHANT_PostReservesHandle *prh = cls;
87 0 : const json_t *json = response;
88 0 : struct TALER_MERCHANT_HttpResponse hr = {
89 0 : .http_status = (unsigned int) response_code,
90 : .reply = json
91 : };
92 :
93 0 : prh->job = NULL;
94 0 : switch (response_code)
95 : {
96 0 : case 0:
97 0 : hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
98 0 : break;
99 0 : case MHD_HTTP_OK:
100 : {
101 : const char *payto_uri;
102 : struct TALER_ReservePublicKeyP reserve_pub;
103 : struct GNUNET_JSON_Specification spec[] = {
104 0 : GNUNET_JSON_spec_fixed_auto ("reserve_pub",
105 : &reserve_pub),
106 0 : GNUNET_JSON_spec_string ("payto_uri",
107 : &payto_uri),
108 0 : GNUNET_JSON_spec_end ()
109 : };
110 :
111 0 : if (GNUNET_OK !=
112 0 : GNUNET_JSON_parse (json,
113 : spec,
114 : NULL, NULL))
115 : {
116 0 : GNUNET_break_op (0);
117 0 : hr.http_status = 0;
118 0 : hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
119 0 : break;
120 : }
121 : else
122 : {
123 0 : prh->cb (prh->cb_cls,
124 : &hr,
125 : &reserve_pub,
126 : payto_uri);
127 0 : GNUNET_JSON_parse_free (spec);
128 0 : TALER_MERCHANT_reserves_post_cancel (prh);
129 0 : return;
130 : }
131 : }
132 0 : case MHD_HTTP_ACCEPTED:
133 0 : break;
134 0 : case MHD_HTTP_UNAUTHORIZED:
135 0 : hr.ec = TALER_JSON_get_error_code (json);
136 0 : hr.hint = TALER_JSON_get_error_hint (json);
137 : /* Nothing really to verify, merchant says we need to authenticate. */
138 0 : break;
139 0 : case MHD_HTTP_NOT_FOUND:
140 : /* Nothing really to verify, this should never
141 : happen, we should pass the JSON reply to the application */
142 0 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
143 : "Did not find any data\n");
144 0 : hr.ec = TALER_JSON_get_error_code (json);
145 0 : hr.hint = TALER_JSON_get_error_hint (json);
146 0 : break;
147 0 : case MHD_HTTP_INTERNAL_SERVER_ERROR:
148 : /* Server had an internal issue; we should retry, but this API
149 : leaves this to the application */
150 0 : hr.ec = TALER_JSON_get_error_code (json);
151 0 : hr.hint = TALER_JSON_get_error_hint (json);
152 0 : break;
153 0 : default:
154 : /* unexpected response code */
155 0 : GNUNET_break_op (0);
156 0 : TALER_MERCHANT_parse_error_details_ (json,
157 : response_code,
158 : &hr);
159 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
160 : "Unexpected response code %u/%d\n",
161 : (unsigned int) response_code,
162 : (int) hr.ec);
163 0 : break;
164 : }
165 0 : prh->cb (prh->cb_cls,
166 : &hr,
167 : NULL,
168 : NULL);
169 0 : TALER_MERCHANT_reserves_post_cancel (prh);
170 : }
171 :
172 :
173 : struct TALER_MERCHANT_PostReservesHandle *
174 0 : TALER_MERCHANT_reserves_post (
175 : struct GNUNET_CURL_Context *ctx,
176 : const char *backend_url,
177 : const struct TALER_Amount *initial_balance,
178 : const char *exchange_url,
179 : const char *wire_method,
180 : TALER_MERCHANT_PostReservesCallback cb,
181 : void *cb_cls)
182 : {
183 : struct TALER_MERCHANT_PostReservesHandle *prh;
184 : CURL *eh;
185 : json_t *req;
186 :
187 0 : prh = GNUNET_new (struct TALER_MERCHANT_PostReservesHandle);
188 0 : prh->ctx = ctx;
189 0 : prh->cb = cb;
190 0 : prh->cb_cls = cb_cls;
191 0 : prh->url = TALER_url_join (backend_url,
192 : "private/reserves",
193 : NULL);
194 0 : if (NULL == prh->url)
195 : {
196 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
197 : "Could not construct request URL.\n");
198 0 : GNUNET_free (prh);
199 0 : return NULL;
200 : }
201 0 : req = GNUNET_JSON_PACK (
202 : TALER_JSON_pack_amount ("initial_balance",
203 : initial_balance),
204 : GNUNET_JSON_pack_string ("wire_method",
205 : wire_method),
206 : GNUNET_JSON_pack_string ("exchange_url",
207 : exchange_url));
208 0 : eh = TALER_MERCHANT_curl_easy_get_ (prh->url);
209 0 : if (GNUNET_OK !=
210 0 : TALER_curl_easy_post (&prh->post_ctx,
211 : eh,
212 : req))
213 : {
214 0 : GNUNET_break (0);
215 0 : curl_easy_cleanup (eh);
216 0 : json_decref (req);
217 0 : GNUNET_free (prh->url);
218 0 : GNUNET_free (prh);
219 0 : return NULL;
220 : }
221 0 : json_decref (req);
222 0 : prh->job = GNUNET_CURL_job_add2 (ctx,
223 : eh,
224 0 : prh->post_ctx.headers,
225 : &handle_post_reserves_finished,
226 : prh);
227 0 : return prh;
228 : }
229 :
230 :
231 : void
232 0 : TALER_MERCHANT_reserves_post_cancel (
233 : struct TALER_MERCHANT_PostReservesHandle *prh)
234 : {
235 0 : if (NULL != prh->job)
236 : {
237 0 : GNUNET_CURL_job_cancel (prh->job);
238 0 : prh->job = NULL;
239 : }
240 0 : GNUNET_free (prh->url);
241 0 : TALER_curl_easy_post_finished (&prh->post_ctx);
242 0 : GNUNET_free (prh);
243 0 : }
244 :
245 :
246 : /* end of merchant_api_post_reserves.c */
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