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
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_instances.c
21 : * @brief Implementation of the POST /instances request
22 : * of the merchant's HTTP API
23 : * @author Christian Grothoff
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 "taler_merchant_service.h"
31 : #include "merchant_api_curl_defaults.h"
32 : #include <taler/taler_json_lib.h>
33 : #include <taler/taler_curl_lib.h>
34 :
35 :
36 : /**
37 : * Handle for a POST /instances/$ID operation.
38 : */
39 : struct TALER_MERCHANT_InstancesPostHandle
40 : {
41 :
42 : /**
43 : * The url for this request.
44 : */
45 : char *url;
46 :
47 : /**
48 : * Handle for the request.
49 : */
50 : struct GNUNET_CURL_Job *job;
51 :
52 : /**
53 : * Function to call with the result.
54 : */
55 : TALER_MERCHANT_InstancesPostCallback cb;
56 :
57 : /**
58 : * Closure for @a cb.
59 : */
60 : void *cb_cls;
61 :
62 : /**
63 : * Reference to the execution context.
64 : */
65 : struct GNUNET_CURL_Context *ctx;
66 :
67 : /**
68 : * Minor context that holds body and headers.
69 : */
70 : struct TALER_CURL_PostContext post_ctx;
71 :
72 : };
73 :
74 :
75 : /**
76 : * Function called when we're done processing the
77 : * HTTP POST /instances request.
78 : *
79 : * @param cls the `struct TALER_MERCHANT_InstancesPostHandle`
80 : * @param response_code HTTP response code, 0 on error
81 : * @param response response body, NULL if not in JSON
82 : */
83 : static void
84 0 : handle_post_instances_finished (void *cls,
85 : long response_code,
86 : const void *response)
87 : {
88 0 : struct TALER_MERCHANT_InstancesPostHandle *iph = cls;
89 0 : const json_t *json = response;
90 0 : struct TALER_MERCHANT_HttpResponse hr = {
91 0 : .http_status = (unsigned int) response_code,
92 : .reply = json
93 : };
94 :
95 0 : iph->job = NULL;
96 0 : GNUNET_log (GNUNET_ERROR_TYPE_INFO,
97 : "POST /management/instances completed with response code %u\n",
98 : (unsigned int) response_code);
99 0 : switch (response_code)
100 : {
101 0 : case 0:
102 0 : hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
103 0 : break;
104 0 : case MHD_HTTP_NO_CONTENT:
105 0 : break;
106 0 : case MHD_HTTP_BAD_REQUEST:
107 0 : hr.ec = TALER_JSON_get_error_code (json);
108 0 : hr.hint = TALER_JSON_get_error_hint (json);
109 : /* This should never happen, either us
110 : * or the merchant is buggy (or API version conflict);
111 : * just pass JSON reply to the application */
112 0 : break;
113 0 : case MHD_HTTP_UNAUTHORIZED:
114 0 : hr.ec = TALER_JSON_get_error_code (json);
115 0 : hr.hint = TALER_JSON_get_error_hint (json);
116 : /* Nothing really to verify, merchant says we need to authenticate. */
117 0 : break;
118 0 : case MHD_HTTP_FORBIDDEN:
119 0 : hr.ec = TALER_JSON_get_error_code (json);
120 0 : hr.hint = TALER_JSON_get_error_hint (json);
121 : /* Nothing really to verify, merchant says we tried to abort the payment
122 : * after it was successful. We should pass the JSON reply to the
123 : * application */
124 0 : break;
125 0 : case MHD_HTTP_NOT_FOUND:
126 0 : hr.ec = TALER_JSON_get_error_code (json);
127 0 : hr.hint = TALER_JSON_get_error_hint (json);
128 : /* Nothing really to verify, this should never
129 : happen, we should pass the JSON reply to the
130 : application */
131 0 : break;
132 0 : case MHD_HTTP_CONFLICT:
133 0 : hr.ec = TALER_JSON_get_error_code (json);
134 0 : hr.hint = TALER_JSON_get_error_hint (json);
135 0 : break;
136 0 : case MHD_HTTP_INTERNAL_SERVER_ERROR:
137 0 : hr.ec = TALER_JSON_get_error_code (json);
138 0 : hr.hint = TALER_JSON_get_error_hint (json);
139 : /* Server had an internal issue; we should retry,
140 : but this API leaves this to the application */
141 0 : break;
142 0 : default:
143 0 : TALER_MERCHANT_parse_error_details_ (json,
144 : response_code,
145 : &hr);
146 : /* unexpected response code */
147 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
148 : "Unexpected response code %u/%d\n",
149 : (unsigned int) response_code,
150 : (int) hr.ec);
151 0 : GNUNET_break_op (0);
152 0 : break;
153 : }
154 0 : iph->cb (iph->cb_cls,
155 : &hr);
156 0 : TALER_MERCHANT_instances_post_cancel (iph);
157 0 : }
158 :
159 :
160 : struct TALER_MERCHANT_InstancesPostHandle *
161 0 : TALER_MERCHANT_instances_post (
162 : struct GNUNET_CURL_Context *ctx,
163 : const char *backend_url,
164 : const char *instance_id,
165 : unsigned int accounts_length,
166 : const char *payto_uris[],
167 : const char *name,
168 : const json_t *address,
169 : const json_t *jurisdiction,
170 : const struct TALER_Amount *default_max_wire_fee,
171 : uint32_t default_wire_fee_amortization,
172 : const struct TALER_Amount *default_max_deposit_fee,
173 : struct GNUNET_TIME_Relative default_wire_transfer_delay,
174 : struct GNUNET_TIME_Relative default_pay_delay,
175 : const char *auth_token,
176 : TALER_MERCHANT_InstancesPostCallback cb,
177 : void *cb_cls)
178 : {
179 : struct TALER_MERCHANT_InstancesPostHandle *iph;
180 : json_t *jpayto_uris;
181 : json_t *req_obj;
182 : json_t *auth_obj;
183 :
184 0 : if (NULL != auth_token)
185 : {
186 0 : if (0 != strncasecmp (RFC_8959_PREFIX,
187 : auth_token,
188 : strlen (RFC_8959_PREFIX)))
189 : {
190 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
191 : "Authentication token must start with `%s'\n",
192 : RFC_8959_PREFIX);
193 0 : return NULL;
194 : }
195 0 : auth_obj = GNUNET_JSON_PACK (
196 : GNUNET_JSON_pack_string ("method",
197 : "token"),
198 : GNUNET_JSON_pack_string ("token",
199 : auth_token));
200 : }
201 : else
202 : {
203 0 : auth_obj = GNUNET_JSON_PACK (
204 : GNUNET_JSON_pack_string ("method",
205 : "external"));
206 : }
207 0 : if (NULL == auth_obj)
208 : {
209 0 : GNUNET_break (0);
210 0 : return NULL;
211 : }
212 0 : jpayto_uris = json_array ();
213 0 : if (NULL == jpayto_uris)
214 : {
215 0 : json_decref (auth_obj);
216 0 : GNUNET_break (0);
217 0 : return NULL;
218 : }
219 0 : for (unsigned int i = 0; i<accounts_length; i++)
220 : {
221 0 : if (0 !=
222 0 : json_array_append_new (jpayto_uris,
223 0 : json_string (payto_uris[i])))
224 : {
225 0 : GNUNET_break (0);
226 0 : json_decref (auth_obj);
227 0 : json_decref (jpayto_uris);
228 0 : return NULL;
229 : }
230 : }
231 0 : req_obj = GNUNET_JSON_PACK (
232 : GNUNET_JSON_pack_array_steal ("payto_uris",
233 : jpayto_uris),
234 : GNUNET_JSON_pack_string ("id",
235 : instance_id),
236 : GNUNET_JSON_pack_string ("name",
237 : name),
238 : GNUNET_JSON_pack_object_incref ("address",
239 : (json_t *) address),
240 : GNUNET_JSON_pack_object_incref ("jurisdiction",
241 : (json_t *) jurisdiction),
242 : TALER_JSON_pack_amount ("default_max_wire_fee",
243 : default_max_wire_fee),
244 : GNUNET_JSON_pack_uint64 ("default_wire_fee_amortization",
245 : default_wire_fee_amortization),
246 : TALER_JSON_pack_amount ("default_max_deposit_fee",
247 : default_max_deposit_fee),
248 : GNUNET_JSON_pack_time_rel ("default_wire_transfer_delay",
249 : default_wire_transfer_delay),
250 : GNUNET_JSON_pack_time_rel ("default_pay_delay",
251 : default_pay_delay),
252 : GNUNET_JSON_pack_object_steal ("auth",
253 : auth_obj));
254 0 : iph = GNUNET_new (struct TALER_MERCHANT_InstancesPostHandle);
255 0 : iph->ctx = ctx;
256 0 : iph->cb = cb;
257 0 : iph->cb_cls = cb_cls;
258 0 : iph->url = TALER_url_join (backend_url,
259 : "management/instances",
260 : NULL);
261 0 : if (NULL == iph->url)
262 : {
263 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
264 : "Could not construct request URL.\n");
265 0 : json_decref (req_obj);
266 0 : GNUNET_free (iph);
267 0 : return NULL;
268 : }
269 : {
270 : CURL *eh;
271 :
272 0 : eh = TALER_MERCHANT_curl_easy_get_ (iph->url);
273 0 : if (GNUNET_OK !=
274 0 : TALER_curl_easy_post (&iph->post_ctx,
275 : eh,
276 : req_obj))
277 : {
278 0 : GNUNET_break (0);
279 0 : curl_easy_cleanup (eh);
280 0 : json_decref (req_obj);
281 0 : GNUNET_free (iph);
282 0 : return NULL;
283 : }
284 0 : json_decref (req_obj);
285 0 : iph->job = GNUNET_CURL_job_add2 (ctx,
286 : eh,
287 0 : iph->post_ctx.headers,
288 : &handle_post_instances_finished,
289 : iph);
290 : }
291 0 : return iph;
292 : }
293 :
294 :
295 : void
296 0 : TALER_MERCHANT_instances_post_cancel (
297 : struct TALER_MERCHANT_InstancesPostHandle *iph)
298 : {
299 0 : if (NULL != iph->job)
300 : {
301 0 : GNUNET_CURL_job_cancel (iph->job);
302 0 : iph->job = NULL;
303 : }
304 0 : TALER_curl_easy_post_finished (&iph->post_ctx);
305 0 : GNUNET_free (iph->url);
306 0 : GNUNET_free (iph);
307 0 : }
308 :
309 :
310 : /* end of merchant_api_post_instances.c */
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