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 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 lib/merchant_api_delete_reserve.c
19 : * @brief Implementation of the DELETE /reserves/$RESERVE_PUB request of the merchant's HTTP API
20 : * @author Jonathan Buchanan
21 : */
22 : #include "platform.h"
23 : #include <curl/curl.h>
24 : #include <jansson.h>
25 : #include <microhttpd.h> /* just for HTTP status codes */
26 : #include <gnunet/gnunet_util_lib.h>
27 : #include <gnunet/gnunet_curl_lib.h>
28 : #include "taler_merchant_service.h"
29 : #include <taler/taler_json_lib.h>
30 : #include <taler/taler_signatures.h>
31 :
32 :
33 : /**
34 : * Handle for a DELETE /reserves/$RESERVE_PUB operation.
35 : */
36 : struct TALER_MERCHANT_ReserveDeleteHandle
37 : {
38 :
39 : /**
40 : * The url for this request.
41 : */
42 : char *url;
43 :
44 : /**
45 : * Handle for the request.
46 : */
47 : struct GNUNET_CURL_Job *job;
48 :
49 : /**
50 : * Function to call with the result.
51 : */
52 : TALER_MERCHANT_ReserveDeleteCallback cb;
53 :
54 : /**
55 : * Closure for @a cb.
56 : */
57 : void *cb_cls;
58 :
59 : /**
60 : * Reference to the execution context.
61 : */
62 : struct GNUNET_CURL_Context *ctx;
63 :
64 : };
65 :
66 :
67 : /**
68 : * Function called when we're done processing the
69 : * HTTP DELETE /reserves/$RESERVE_PUB request.
70 : *
71 : * @param cls the `struct TALER_MERCHANT_InstanceDeleteHandle`
72 : * @param response_code HTTP response code, 0 on error
73 : * @param json response body, NULL if not in JSON
74 : */
75 : static void
76 0 : handle_delete_reserve_finished (void *cls,
77 : long response_code,
78 : const void *response)
79 : {
80 0 : struct TALER_MERCHANT_ReserveDeleteHandle *rdh = cls;
81 0 : const json_t *json = response;
82 0 : struct TALER_MERCHANT_HttpResponse hr = {
83 0 : .http_status = (unsigned int) response_code,
84 : .reply = json
85 : };
86 :
87 0 : rdh->job = NULL;
88 0 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
89 : "Got /reserves/$ID response with status code %u\n",
90 : (unsigned int) response_code);
91 0 : switch (response_code)
92 : {
93 0 : case MHD_HTTP_NO_CONTENT:
94 0 : break;
95 0 : default:
96 : /* unexpected response code */
97 0 : hr.ec = TALER_JSON_get_error_code (json);
98 0 : hr.hint = TALER_JSON_get_error_hint (json);
99 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
100 : "Unexpected response code %u/%d\n",
101 : (unsigned int) response_code,
102 : (int) hr.ec);
103 0 : break;
104 : }
105 0 : rdh->cb (rdh->cb_cls,
106 : &hr);
107 0 : TALER_MERCHANT_reserve_delete_cancel (rdh);
108 0 : }
109 :
110 :
111 : /**
112 : * Delete the private key of a reserve.
113 : *
114 : * @param ctx the context
115 : * @param backend_url HTTP base URL for the backend
116 : * @param instance_id which instance should be deleted
117 : * @param purge purge instead of just deleting
118 : * @param instances_cb function to call with the
119 : * backend's return
120 : * @param instances_cb_cls closure for @a config_cb
121 : * @return the instances handle; NULL upon error
122 : */
123 : static struct TALER_MERCHANT_ReserveDeleteHandle *
124 0 : reserve_delete (struct GNUNET_CURL_Context *ctx,
125 : const char *backend_url,
126 : const struct TALER_ReservePublicKeyP *reserve_pub,
127 : bool purge,
128 : TALER_MERCHANT_ReserveDeleteCallback cb,
129 : void *cb_cls)
130 : {
131 : struct TALER_MERCHANT_ReserveDeleteHandle *rdh;
132 :
133 0 : rdh = GNUNET_new (struct TALER_MERCHANT_ReserveDeleteHandle);
134 0 : rdh->ctx = ctx;
135 0 : rdh->cb = cb;
136 0 : rdh->cb_cls = cb_cls;
137 : {
138 : char res_str[sizeof (*reserve_pub) * 2];
139 : char arg_str[sizeof (res_str) + 32];
140 : char *end;
141 :
142 0 : end = GNUNET_STRINGS_data_to_string (reserve_pub,
143 : sizeof (*reserve_pub),
144 : res_str,
145 : sizeof (res_str));
146 0 : *end = '\0';
147 0 : GNUNET_snprintf (arg_str,
148 : sizeof (arg_str),
149 : "private/reserves/%s",
150 : res_str);
151 0 : if (purge)
152 0 : rdh->url = TALER_url_join (backend_url,
153 : arg_str,
154 : "purge",
155 : "yes",
156 : NULL);
157 : else
158 0 : rdh->url = TALER_url_join (backend_url,
159 : arg_str,
160 : NULL);
161 : }
162 0 : if (NULL == rdh->url)
163 : {
164 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
165 : "Could not construct request URL.\n");
166 0 : GNUNET_free (rdh);
167 0 : return NULL;
168 : }
169 0 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
170 : "Requesting URL '%s'\n",
171 : rdh->url);
172 : {
173 : CURL *eh;
174 :
175 0 : eh = curl_easy_init ();
176 0 : GNUNET_assert (CURLE_OK ==
177 : curl_easy_setopt (eh,
178 : CURLOPT_URL,
179 : rdh->url));
180 0 : GNUNET_assert (CURLE_OK ==
181 : curl_easy_setopt (eh,
182 : CURLOPT_CUSTOMREQUEST,
183 : MHD_HTTP_METHOD_DELETE));
184 0 : rdh->job = GNUNET_CURL_job_add (ctx,
185 : eh,
186 : &handle_delete_reserve_finished,
187 : rdh);
188 : }
189 0 : return rdh;
190 : }
191 :
192 :
193 : /**
194 : * Issue a DELETE /reserve/$RESERVE_ID request to the backend. Only
195 : * deletes the private key of the reserve, preserves tipping data.
196 : *
197 : * @param ctx execution context
198 : * @param backend_url base URL of the merchant backend
199 : * @param reserve_pub which reserve should be queried
200 : * @param cb function to call with the result
201 : * @param cb_cls closure for @a cb
202 : * @return handle for this operation, NULL upon errors
203 : */
204 : struct TALER_MERCHANT_ReserveDeleteHandle *
205 0 : TALER_MERCHANT_reserve_delete (
206 : struct GNUNET_CURL_Context *ctx,
207 : const char *backend_url,
208 : const struct TALER_ReservePublicKeyP *reserve_pub,
209 : TALER_MERCHANT_ReserveDeleteCallback cb,
210 : void *cb_cls)
211 : {
212 0 : return reserve_delete (ctx,
213 : backend_url,
214 : reserve_pub,
215 : false,
216 : cb,
217 : cb_cls);
218 : }
219 :
220 :
221 : /**
222 : * Issue a DELETE /reserve/$RESERVE_ID request to the backend.
223 : * Purges the reserve, deleting all associated data. DANGEROUS.
224 : *
225 : * @param ctx execution context
226 : * @param backend_url base URL of the merchant backend
227 : * @param reserve_pub which reserve should be queried
228 : * @param cb function to call with the result
229 : * @param cb_cls closure for @a cb
230 : * @return handle for this operation, NULL upon errors
231 : */
232 : struct TALER_MERCHANT_ReserveDeleteHandle *
233 0 : TALER_MERCHANT_reserve_purge (struct GNUNET_CURL_Context *ctx,
234 : const char *backend_url,
235 : const struct TALER_ReservePublicKeyP *reserve_pub,
236 : TALER_MERCHANT_ReserveDeleteCallback cb,
237 : void *cb_cls)
238 : {
239 0 : return reserve_delete (ctx,
240 : backend_url,
241 : reserve_pub,
242 : true,
243 : cb,
244 : cb_cls);
245 : }
246 :
247 :
248 : /**
249 : * Cancel a DELETE (or purge) /reserve/$RESERVE_ID request.
250 : *
251 : * @param rdh handle to the request to be canceled
252 : */
253 : void
254 0 : TALER_MERCHANT_reserve_delete_cancel (
255 : struct TALER_MERCHANT_ReserveDeleteHandle *rdh)
256 : {
257 0 : if (NULL != rdh->job)
258 0 : GNUNET_CURL_job_cancel (rdh->job);
259 0 : GNUNET_free (rdh->url);
260 0 : GNUNET_free (rdh);
261 0 : }
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