|
1
|
/**
|
|
2
|
* This file is part of Haketilo.
|
|
3
|
*
|
|
4
|
* Function: Allow other parts of the extension to bypass CORS by routing their
|
|
5
|
* request through this background script using one-off messages.
|
|
6
|
*
|
|
7
|
* Copyright (C) 2022 Wojtek Kosior <koszko@koszko.org>
|
|
8
|
*
|
|
9
|
* This program is free software: you can redistribute it and/or modify
|
|
10
|
* it under the terms of the GNU General Public License as published by
|
|
11
|
* the Free Software Foundation, either version 3 of the License, or
|
|
12
|
* (at your option) any later version.
|
|
13
|
*
|
|
14
|
* This program is distributed in the hope that it will be useful,
|
|
15
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
16
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
17
|
* GNU General Public License for more details.
|
|
18
|
*
|
|
19
|
* As additional permission under GNU GPL version 3 section 7, you
|
|
20
|
* may distribute forms of that code without the copy of the GNU
|
|
21
|
* GPL normally required by section 4, provided you include this
|
|
22
|
* license notice and, in case of non-source distribution, a URL
|
|
23
|
* through which recipients can access the Corresponding Source.
|
|
24
|
* If you modify file(s) with this exception, you may extend this
|
|
25
|
* exception to your version of the file(s), but you are not
|
|
26
|
* obligated to do so. If you do not wish to do so, delete this
|
|
27
|
* exception statement from your version.
|
|
28
|
*
|
|
29
|
* As a special exception to the GPL, any HTML file which merely
|
|
30
|
* makes function calls to this code, and for that purpose
|
|
31
|
* includes it by reference shall be deemed a separate work for
|
|
32
|
* copyright law purposes. If you modify this code, you may extend
|
|
33
|
* this exception to your version of the code, but you are not
|
|
34
|
* obligated to do so. If you do not wish to do so, delete this
|
|
35
|
* exception statement from your version.
|
|
36
|
*
|
|
37
|
* You should have received a copy of the GNU General Public License
|
|
38
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
39
|
*
|
|
40
|
* I, Wojtek Kosior, thereby promise not to sue for violation of this file's
|
|
41
|
* license. Although I request that you do not make use of this code in a
|
|
42
|
* proprietary program, I am not going to enforce this in court.
|
|
43
|
*/
|
|
44
|
|
|
45
|
#FROM common/browser.js IMPORT browser
|
|
46
|
|
|
47
|
async function get_prop(object, prop, result_object, call_prop=false) {
|
|
48
|
try {
|
|
49
|
result_object[prop] = call_prop ? (await object[prop]()) : object[prop];
|
|
50
|
} catch(e) {
|
|
51
|
result_object[`error_${prop}`] = "" + e;
|
|
52
|
}
|
|
53
|
}
|
|
54
|
|
|
55
|
async function perform_download(fetch_data, respond_cb) {
|
|
56
|
try {
|
|
57
|
const response = await fetch(fetch_data.url);
|
|
58
|
const result = {};
|
|
59
|
|
|
60
|
for (const prop of (fetch_data.to_get || []))
|
|
61
|
get_prop(response, prop, result);
|
|
62
|
|
|
63
|
const to_call = (fetch_data.to_call || []);
|
|
64
|
const promises = [];
|
|
65
|
for (let i = 0; i < to_call.length; i++) {
|
|
66
|
const response_to_use = i === to_call.length - 1 ?
|
|
67
|
response : response.clone();
|
|
68
|
promises.push(get_prop(response_to_use, to_call[i], result, true));
|
|
69
|
}
|
|
70
|
|
|
71
|
await Promise.all(promises);
|
|
72
|
return result;
|
|
73
|
} catch(e) {
|
|
74
|
return {error: "" + e};
|
|
75
|
}
|
|
76
|
}
|
|
77
|
|
|
78
|
function on_CORS_bypass_request([type, fetch_data], sender, respond_cb) {
|
|
79
|
if (type !== "CORS_bypass")
|
|
80
|
return;
|
|
81
|
|
|
82
|
perform_download(fetch_data).then(respond_cb);
|
|
83
|
|
|
84
|
return true;
|
|
85
|
}
|
|
86
|
|
|
87
|
function start() {
|
|
88
|
browser.runtime.onMessage.addListener(on_CORS_bypass_request);
|
|
89
|
}
|
|
90
|
#EXPORT start
|