Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2022-2026 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_get-templates-TEMPLATE_ID-new.c
19 : * @brief Implementation of the GET /templates/$TEMPLATE_ID request (wallet-facing)
20 : * @author Christian Grothoff
21 : */
22 : #include "taler/platform.h"
23 : #include <curl/curl.h>
24 : #include <jansson.h>
25 : #include <microhttpd.h> /* just for HTTP status codes */
26 : #include <gnunet/gnunet_util_lib.h>
27 : #include <gnunet/gnunet_curl_lib.h>
28 : #include <taler/merchant/get-templates-TEMPLATE_ID.h>
29 : #include "merchant_api_curl_defaults.h"
30 : #include <taler/taler_json_lib.h>
31 :
32 :
33 : /**
34 : * Handle for a GET /templates/$TEMPLATE_ID operation (wallet-facing).
35 : */
36 : struct TALER_MERCHANT_GetTemplatesHandle
37 : {
38 : /**
39 : * Base URL of the merchant backend.
40 : */
41 : char *base_url;
42 :
43 : /**
44 : * The full URL for this request.
45 : */
46 : char *url;
47 :
48 : /**
49 : * Handle for the request.
50 : */
51 : struct GNUNET_CURL_Job *job;
52 :
53 : /**
54 : * Function to call with the result.
55 : */
56 : TALER_MERCHANT_GetTemplatesCallback cb;
57 :
58 : /**
59 : * Closure for @a cb.
60 : */
61 : TALER_MERCHANT_GET_TEMPLATES_RESULT_CLOSURE *cb_cls;
62 :
63 : /**
64 : * Reference to the execution context.
65 : */
66 : struct GNUNET_CURL_Context *ctx;
67 :
68 : /**
69 : * Template identifier.
70 : */
71 : char *template_id;
72 : };
73 :
74 :
75 : /**
76 : * Function called when we're done processing the
77 : * HTTP GET /templates/$TEMPLATE_ID request.
78 : *
79 : * @param cls the `struct TALER_MERCHANT_GetTemplatesHandle`
80 : * @param response_code HTTP response code, 0 on error
81 : * @param response response body, NULL if not in JSON
82 : */
83 : static void
84 0 : handle_get_template_finished (void *cls,
85 : long response_code,
86 : const void *response)
87 : {
88 0 : struct TALER_MERCHANT_GetTemplatesHandle *gth = cls;
89 0 : const json_t *json = response;
90 0 : struct TALER_MERCHANT_GetTemplatesResponse wtgr = {
91 0 : .hr.http_status = (unsigned int) response_code,
92 : .hr.reply = json
93 : };
94 :
95 0 : gth->job = NULL;
96 0 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
97 : "Got /templates/$TEMPLATE_ID response with status code %u\n",
98 : (unsigned int) response_code);
99 0 : switch (response_code)
100 : {
101 0 : case MHD_HTTP_OK:
102 : {
103 : struct GNUNET_JSON_Specification spec[] = {
104 0 : GNUNET_JSON_spec_object_const ("template_contract",
105 : &wtgr.details.ok.template_contract),
106 0 : GNUNET_JSON_spec_mark_optional (
107 : GNUNET_JSON_spec_object_const (
108 : "editable_defaults",
109 : &wtgr.details.ok.editable_defaults),
110 : NULL),
111 : /* FIXME: never actually set by the merchant in the current code! */
112 0 : GNUNET_JSON_spec_mark_optional (
113 : GNUNET_JSON_spec_string (
114 : "required_currency",
115 : &wtgr.details.ok.required_currency),
116 : NULL),
117 0 : GNUNET_JSON_spec_end ()
118 : };
119 :
120 0 : if (GNUNET_OK !=
121 0 : GNUNET_JSON_parse (json,
122 : spec,
123 : NULL, NULL))
124 : {
125 0 : wtgr.hr.http_status = 0;
126 0 : wtgr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
127 0 : break;
128 : }
129 0 : break;
130 : }
131 0 : case MHD_HTTP_UNAUTHORIZED:
132 0 : wtgr.hr.ec = TALER_JSON_get_error_code (json);
133 0 : wtgr.hr.hint = TALER_JSON_get_error_hint (json);
134 0 : break;
135 0 : case MHD_HTTP_NOT_FOUND:
136 0 : wtgr.hr.ec = TALER_JSON_get_error_code (json);
137 0 : wtgr.hr.hint = TALER_JSON_get_error_hint (json);
138 0 : break;
139 0 : default:
140 0 : wtgr.hr.ec = TALER_JSON_get_error_code (json);
141 0 : wtgr.hr.hint = TALER_JSON_get_error_hint (json);
142 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
143 : "Unexpected response code %u/%d\n",
144 : (unsigned int) response_code,
145 : (int) wtgr.hr.ec);
146 0 : break;
147 : }
148 0 : gth->cb (gth->cb_cls,
149 : &wtgr);
150 0 : TALER_MERCHANT_get_templates_cancel (gth);
151 0 : }
152 :
153 :
154 : struct TALER_MERCHANT_GetTemplatesHandle *
155 0 : TALER_MERCHANT_get_templates_create (
156 : struct GNUNET_CURL_Context *ctx,
157 : const char *url,
158 : const char *template_id)
159 : {
160 : struct TALER_MERCHANT_GetTemplatesHandle *gth;
161 :
162 0 : gth = GNUNET_new (struct TALER_MERCHANT_GetTemplatesHandle);
163 0 : gth->ctx = ctx;
164 0 : gth->base_url = GNUNET_strdup (url);
165 0 : gth->template_id = GNUNET_strdup (template_id);
166 0 : return gth;
167 : }
168 :
169 :
170 : enum TALER_ErrorCode
171 0 : TALER_MERCHANT_get_templates_start (
172 : struct TALER_MERCHANT_GetTemplatesHandle *gth,
173 : TALER_MERCHANT_GetTemplatesCallback cb,
174 : TALER_MERCHANT_GET_TEMPLATES_RESULT_CLOSURE *cb_cls)
175 : {
176 : CURL *eh;
177 :
178 0 : gth->cb = cb;
179 0 : gth->cb_cls = cb_cls;
180 : {
181 : char *path;
182 :
183 0 : GNUNET_asprintf (&path,
184 : "templates/%s",
185 : gth->template_id);
186 0 : gth->url = TALER_url_join (gth->base_url,
187 : path,
188 : NULL);
189 0 : GNUNET_free (path);
190 : }
191 0 : if (NULL == gth->url)
192 0 : return TALER_EC_GENERIC_CONFIGURATION_INVALID;
193 0 : eh = TALER_MERCHANT_curl_easy_get_ (gth->url);
194 0 : if (NULL == eh)
195 0 : return TALER_EC_GENERIC_CONFIGURATION_INVALID;
196 0 : gth->job = GNUNET_CURL_job_add (gth->ctx,
197 : eh,
198 : &handle_get_template_finished,
199 : gth);
200 0 : if (NULL == gth->job)
201 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
202 0 : return TALER_EC_NONE;
203 : }
204 :
205 :
206 : void
207 0 : TALER_MERCHANT_get_templates_cancel (
208 : struct TALER_MERCHANT_GetTemplatesHandle *gth)
209 : {
210 0 : if (NULL != gth->job)
211 : {
212 0 : GNUNET_CURL_job_cancel (gth->job);
213 0 : gth->job = NULL;
214 : }
215 0 : GNUNET_free (gth->url);
216 0 : GNUNET_free (gth->base_url);
217 0 : GNUNET_free (gth->template_id);
218 0 : GNUNET_free (gth);
219 0 : }
220 :
221 :
222 : /* end of merchant_api_get-templates-TEMPLATE_ID-new.c */
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