Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2020, 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,
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_patch_order_forget.c
21 : * @brief Implementation of the PATCH /orders/$ID/forget request
22 : * of the merchant's HTTP API
23 : * @author Jonathan Buchanan
24 : */
25 : #include "platform.h"
26 : #include <curl/curl.h>
27 : #include <jansson.h>
28 : #include <microhttpd.h> /* just for HTTP status codes */
29 : #include <gnunet/gnunet_util_lib.h>
30 : #include "taler_merchant_service.h"
31 : #include "merchant_api_curl_defaults.h"
32 : #include <taler/taler_json_lib.h>
33 : #include <taler/taler_curl_lib.h>
34 :
35 :
36 : /**
37 : * Handle for a PATCH /orders/$ORDER_ID/forget operation.
38 : */
39 : struct TALER_MERCHANT_OrderForgetHandle
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_ForgetCallback 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 PATCH /orders/$ORDER_ID/forget request.
78 : *
79 : * @param cls the `struct TALER_MERCHANT_OrderForgetHandle`
80 : * @param response_code HTTP response code, 0 on error
81 : * @param response response body, NULL if not in JSON
82 : */
83 : static void
84 0 : handle_forget_finished (void *cls,
85 : long response_code,
86 : const void *response)
87 : {
88 0 : struct TALER_MERCHANT_OrderForgetHandle *ofh = cls;
89 0 : const json_t *json = response;
90 0 : struct TALER_MERCHANT_HttpResponse hr = {
91 0 : .http_status = (unsigned int) response_code,
92 : .reply = json
93 : };
94 :
95 0 : ofh->job = NULL;
96 0 : GNUNET_log (GNUNET_ERROR_TYPE_INFO,
97 : "PATCH /orders/$ORDER_ID/forget 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_OK:
105 : /* fields were NOW forgotten */
106 0 : break;
107 0 : case MHD_HTTP_NO_CONTENT:
108 : /* fields were already forgotten before */
109 0 : break;
110 0 : case MHD_HTTP_BAD_REQUEST:
111 0 : hr.ec = TALER_JSON_get_error_code (json);
112 0 : hr.hint = TALER_JSON_get_error_hint (json);
113 0 : break;
114 0 : case MHD_HTTP_UNAUTHORIZED:
115 0 : hr.ec = TALER_JSON_get_error_code (json);
116 0 : hr.hint = TALER_JSON_get_error_hint (json);
117 : /* Nothing really to verify, merchant says we need to authenticate. */
118 0 : break;
119 0 : case MHD_HTTP_NOT_FOUND:
120 0 : hr.ec = TALER_JSON_get_error_code (json);
121 0 : hr.hint = TALER_JSON_get_error_hint (json);
122 0 : break;
123 0 : case MHD_HTTP_CONFLICT:
124 0 : hr.ec = TALER_JSON_get_error_code (json);
125 0 : hr.hint = TALER_JSON_get_error_hint (json);
126 0 : break;
127 0 : case MHD_HTTP_INTERNAL_SERVER_ERROR:
128 0 : hr.ec = TALER_JSON_get_error_code (json);
129 0 : hr.hint = TALER_JSON_get_error_hint (json);
130 : /* Server had an internal issue; we should retry,
131 : but this API leaves this to the application */
132 0 : break;
133 0 : default:
134 0 : TALER_MERCHANT_parse_error_details_ (json,
135 : response_code,
136 : &hr);
137 : /* unexpected response code */
138 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
139 : "Unexpected response code %u/%d\n",
140 : (unsigned int) response_code,
141 : (int) hr.ec);
142 0 : GNUNET_break_op (0);
143 0 : break;
144 : }
145 0 : ofh->cb (ofh->cb_cls,
146 : &hr);
147 0 : TALER_MERCHANT_order_forget_cancel (ofh);
148 0 : }
149 :
150 :
151 : struct TALER_MERCHANT_OrderForgetHandle *
152 0 : TALER_MERCHANT_order_forget (struct GNUNET_CURL_Context *ctx,
153 : const char *merchant_url,
154 : const char *order_id,
155 : unsigned int fields_length,
156 : const char *fields[],
157 : TALER_MERCHANT_ForgetCallback cb,
158 : void *cb_cls)
159 : {
160 : struct TALER_MERCHANT_OrderForgetHandle *ofh;
161 : json_t *req_fields;
162 : json_t *req_obj;
163 :
164 0 : req_fields = json_array ();
165 0 : if (NULL == req_fields)
166 : {
167 0 : GNUNET_break (0);
168 0 : return NULL;
169 : }
170 0 : for (unsigned int i = 0; i<fields_length; i++)
171 : {
172 0 : if (0 !=
173 0 : json_array_append_new (req_fields,
174 0 : json_string (fields[i])))
175 : {
176 0 : GNUNET_break (0);
177 0 : json_decref (req_fields);
178 0 : return NULL;
179 : }
180 : }
181 0 : req_obj = GNUNET_JSON_PACK (
182 : GNUNET_JSON_pack_array_steal ("fields",
183 : req_fields));
184 0 : ofh = GNUNET_new (struct TALER_MERCHANT_OrderForgetHandle);
185 0 : ofh->ctx = ctx;
186 0 : ofh->cb = cb;
187 0 : ofh->cb_cls = cb_cls;
188 : {
189 : char *path;
190 :
191 0 : GNUNET_asprintf (&path,
192 : "private/orders/%s/forget",
193 : order_id);
194 0 : ofh->url = TALER_url_join (merchant_url,
195 : path,
196 : NULL);
197 0 : GNUNET_free (path);
198 : }
199 0 : if (NULL == ofh->url)
200 : {
201 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
202 : "Could not construct request URL.\n");
203 0 : json_decref (req_obj);
204 0 : GNUNET_free (ofh);
205 0 : return NULL;
206 : }
207 : {
208 : CURL *eh;
209 :
210 0 : eh = TALER_MERCHANT_curl_easy_get_ (ofh->url);
211 0 : if (GNUNET_OK !=
212 0 : TALER_curl_easy_post (&ofh->post_ctx,
213 : eh,
214 : req_obj))
215 : {
216 0 : GNUNET_break (0);
217 0 : curl_easy_cleanup (eh);
218 0 : json_decref (req_obj);
219 0 : GNUNET_free (ofh);
220 0 : return NULL;
221 : }
222 0 : json_decref (req_obj);
223 0 : GNUNET_assert (CURLE_OK ==
224 : curl_easy_setopt (eh,
225 : CURLOPT_CUSTOMREQUEST,
226 : MHD_HTTP_METHOD_PATCH));
227 0 : ofh->job = GNUNET_CURL_job_add2 (ctx,
228 : eh,
229 0 : ofh->post_ctx.headers,
230 : &handle_forget_finished,
231 : ofh);
232 : }
233 0 : return ofh;
234 : }
235 :
236 :
237 : void
238 0 : TALER_MERCHANT_order_forget_cancel (struct
239 : TALER_MERCHANT_OrderForgetHandle *ofh)
240 : {
241 0 : if (NULL != ofh->job)
242 : {
243 0 : GNUNET_CURL_job_cancel (ofh->job);
244 0 : ofh->job = NULL;
245 : }
246 0 : TALER_curl_easy_post_finished (&ofh->post_ctx);
247 0 : GNUNET_free (ofh->url);
248 0 : GNUNET_free (ofh);
249 0 : }
250 :
251 :
252 : /* end of merchant_api_patch_order_forget.c */
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