1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
/*
This file is part of GNU Taler
(C) 2022 Taler Systems S.A.
GNU Taler is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
import {
AmountJson,
Amounts,
GetExchangeTosResult,
} from "@gnu-taler/taler-util";
function getJsonIfOk(r: Response): Promise<any> {
if (r.ok) {
return r.json();
}
if (r.status >= 400 && r.status < 500) {
throw new Error(`URL may not be right: (${r.status}) ${r.statusText}`);
}
throw new Error(
`Try another server: (${r.status}) ${r.statusText || "internal server error"
}`,
);
}
export async function queryToSlashConfig<T>(url: string): Promise<T> {
return fetch(new URL("config", url).href)
.catch(() => {
throw new Error(`Network error`);
})
.then(getJsonIfOk);
}
function timeout<T>(ms: number, promise: Promise<T>): Promise<T> {
return new Promise((resolve, reject) => {
const timer = setTimeout(() => {
reject(
new Error(
`Timeout: the query took longer than ${Math.floor(ms / 1000)} secs`,
),
);
}, ms);
promise
.then((value) => {
clearTimeout(timer);
resolve(value);
})
.catch((reason) => {
clearTimeout(timer);
reject(reason);
});
});
}
export async function queryToSlashKeys<T>(url: string): Promise<T> {
const endpoint = new URL("keys", url);
endpoint.searchParams.set("cacheBreaker", new Date().getTime() + "");
const query = fetch(endpoint.href)
.catch(() => {
throw new Error(`Network error`);
})
.then(getJsonIfOk);
return timeout(3000, query);
}
export function buildTermsOfServiceState(
tos: GetExchangeTosResult,
): TermsState {
const content: TermsDocument | undefined = parseTermsOfServiceContent(
tos.contentType,
tos.content,
);
const status: TermsStatus = buildTermsOfServiceStatus(
tos.content,
tos.acceptedEtag,
tos.currentEtag,
);
return { content, status, version: tos.currentEtag };
}
export function buildTermsOfServiceStatus(
content: string | undefined,
acceptedVersion: string | undefined,
currentVersion: string | undefined,
): TermsStatus {
return !content
? "notfound"
: !acceptedVersion
? "new"
: acceptedVersion !== currentVersion
? "changed"
: "accepted";
}
function parseTermsOfServiceContent(
type: string,
text: string,
): TermsDocument | undefined {
if (type === "text/xml") {
try {
const document = new DOMParser().parseFromString(text, "text/xml");
return { type: "xml", document };
} catch (e) {
console.log(e);
}
} else if (type === "text/html") {
try {
const href = new URL(text);
return { type: "html", href };
} catch (e) {
console.log(e);
}
} else if (type === "text/json") {
try {
const data = JSON.parse(text);
return { type: "json", data };
} catch (e) {
console.log(e);
}
} else if (type === "text/pdf") {
try {
const location = new URL(text);
return { type: "pdf", location };
} catch (e) {
console.log(e);
}
} else if (type === "text/plain") {
try {
const content = text;
return { type: "plain", content };
} catch (e) {
console.log(e);
}
}
return undefined;
}
export type TermsState = {
content: TermsDocument | undefined;
status: TermsStatus;
version: string;
};
type TermsStatus = "new" | "accepted" | "changed" | "notfound";
type TermsDocument =
| TermsDocumentXml
| TermsDocumentHtml
| TermsDocumentPlain
| TermsDocumentJson
| TermsDocumentPdf;
export interface TermsDocumentXml {
type: "xml";
document: Document;
}
export interface TermsDocumentHtml {
type: "html";
href: URL;
}
export interface TermsDocumentPlain {
type: "plain";
content: string;
}
export interface TermsDocumentJson {
type: "json";
data: any;
}
export interface TermsDocumentPdf {
type: "pdf";
location: URL;
}
|