Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2021 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_delete_transfer.c
19 : * @brief Implementation of the DELETE /transfer/$ID request of the merchant's HTTP API
20 : * @author Christian Grothoff
21 : */
22 : #include "platform.h"
23 : #include <curl/curl.h>
24 : #include <jansson.h>
25 : #include <microhttpd.h> /* just for HTTP status codes */
26 : #include <gnunet/gnunet_util_lib.h>
27 : #include <gnunet/gnunet_curl_lib.h>
28 : #include "taler_merchant_service.h"
29 : #include "merchant_api_curl_defaults.h"
30 : #include <taler/taler_json_lib.h>
31 : #include <taler/taler_signatures.h>
32 :
33 :
34 : /**
35 : * Handle for a DELETE /transfers/$ID operation.
36 : */
37 : struct TALER_MERCHANT_TransferDeleteHandle
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_TransferDeleteCallback 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 GET /transfers/$ID request.
70 : *
71 : * @param cls the `struct TALER_MERCHANT_TransferDeleteHandle`
72 : * @param response_code HTTP response code, 0 on error
73 : * @param response response body, NULL if not in JSON
74 : */
75 : static void
76 2 : handle_delete_transfer_finished (void *cls,
77 : long response_code,
78 : const void *response)
79 : {
80 2 : struct TALER_MERCHANT_TransferDeleteHandle *tdh = cls;
81 2 : const json_t *json = response;
82 2 : struct TALER_MERCHANT_HttpResponse hr = {
83 2 : .http_status = (unsigned int) response_code,
84 : .reply = json
85 : };
86 :
87 2 : tdh->job = NULL;
88 2 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
89 : "Got /transfers/$ID response with status code %u\n",
90 : (unsigned int) response_code);
91 2 : switch (response_code)
92 : {
93 2 : case MHD_HTTP_NO_CONTENT:
94 2 : break;
95 0 : case MHD_HTTP_UNAUTHORIZED:
96 0 : hr.ec = TALER_JSON_get_error_code (json);
97 0 : hr.hint = TALER_JSON_get_error_hint (json);
98 : /* Nothing really to verify, merchant says we need to authenticate. */
99 0 : break;
100 0 : case MHD_HTTP_NOT_FOUND:
101 0 : hr.ec = TALER_JSON_get_error_code (json);
102 0 : hr.hint = TALER_JSON_get_error_hint (json);
103 0 : break;
104 0 : case MHD_HTTP_CONFLICT:
105 0 : hr.ec = TALER_JSON_get_error_code (json);
106 0 : hr.hint = TALER_JSON_get_error_hint (json);
107 0 : break;
108 0 : default:
109 : /* unexpected response code */
110 0 : hr.ec = TALER_JSON_get_error_code (json);
111 0 : hr.hint = TALER_JSON_get_error_hint (json);
112 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
113 : "Unexpected response code %u/%d\n",
114 : (unsigned int) response_code,
115 : (int) hr.ec);
116 0 : break;
117 : }
118 2 : tdh->cb (tdh->cb_cls,
119 : &hr);
120 2 : TALER_MERCHANT_transfer_delete_cancel (tdh);
121 2 : }
122 :
123 :
124 : struct TALER_MERCHANT_TransferDeleteHandle *
125 2 : TALER_MERCHANT_transfer_delete (
126 : struct GNUNET_CURL_Context *ctx,
127 : const char *backend_url,
128 : uint64_t wire_transfer_serial,
129 : TALER_MERCHANT_TransferDeleteCallback cb,
130 : void *cb_cls)
131 : {
132 : struct TALER_MERCHANT_TransferDeleteHandle *tdh;
133 :
134 2 : tdh = GNUNET_new (struct TALER_MERCHANT_TransferDeleteHandle);
135 2 : tdh->ctx = ctx;
136 2 : tdh->cb = cb;
137 2 : tdh->cb_cls = cb_cls;
138 : {
139 : char *path;
140 :
141 2 : GNUNET_asprintf (&path,
142 : "private/transfers/%llu",
143 : (unsigned long long) wire_transfer_serial);
144 2 : tdh->url = TALER_url_join (backend_url,
145 : path,
146 : NULL);
147 2 : GNUNET_free (path);
148 : }
149 2 : if (NULL == tdh->url)
150 : {
151 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
152 : "Could not construct request URL.\n");
153 0 : GNUNET_free (tdh);
154 0 : return NULL;
155 : }
156 2 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
157 : "Requesting URL '%s'\n",
158 : tdh->url);
159 : {
160 : CURL *eh;
161 :
162 2 : eh = TALER_MERCHANT_curl_easy_get_ (tdh->url);
163 2 : GNUNET_assert (CURLE_OK ==
164 : curl_easy_setopt (eh,
165 : CURLOPT_CUSTOMREQUEST,
166 : MHD_HTTP_METHOD_DELETE));
167 2 : tdh->job = GNUNET_CURL_job_add (ctx,
168 : eh,
169 : &handle_delete_transfer_finished,
170 : tdh);
171 : }
172 2 : return tdh;
173 : }
174 :
175 :
176 : void
177 2 : TALER_MERCHANT_transfer_delete_cancel (
178 : struct TALER_MERCHANT_TransferDeleteHandle *tdh)
179 : {
180 2 : if (NULL != tdh->job)
181 0 : GNUNET_CURL_job_cancel (tdh->job);
182 2 : GNUNET_free (tdh->url);
183 2 : GNUNET_free (tdh);
184 2 : }
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