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
|
<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2018 Arthur Schiwon <blizzz@arthur-schiwon.de>
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Daniel Kesselberg <mail@danielkesselberg.de>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OC\Updater;
use OCP\AppFramework\Db\DoesNotExistException;
use OCP\Http\Client\IClientService;
use OCP\Http\Client\IResponse;
use OCP\ILogger;
class ChangesCheck {
/** @var IClientService */
protected $clientService;
/** @var ChangesMapper */
private $mapper;
/** @var ILogger */
private $logger;
public const RESPONSE_NO_CONTENT = 0;
public const RESPONSE_USE_CACHE = 1;
public const RESPONSE_HAS_CONTENT = 2;
public function __construct(IClientService $clientService, ChangesMapper $mapper, ILogger $logger) {
$this->clientService = $clientService;
$this->mapper = $mapper;
$this->logger = $logger;
}
/**
* @throws DoesNotExistException
*/
public function getChangesForVersion(string $version): array {
$version = $this->normalizeVersion($version);
$changesInfo = $this->mapper->getChanges($version);
$changesData = json_decode($changesInfo->getData(), true);
if (empty($changesData)) {
throw new DoesNotExistException('Unable to decode changes info');
}
return $changesData;
}
/**
* @throws \Exception
*/
public function check(string $uri, string $version): array {
try {
$version = $this->normalizeVersion($version);
$changesInfo = $this->mapper->getChanges($version);
if ($changesInfo->getLastCheck() + 1800 > time()) {
return json_decode($changesInfo->getData(), true);
}
} catch (DoesNotExistException $e) {
$changesInfo = new ChangesResult();
}
$response = $this->queryChangesServer($uri, $changesInfo);
switch ($this->evaluateResponse($response)) {
case self::RESPONSE_NO_CONTENT:
return [];
case self::RESPONSE_USE_CACHE:
return json_decode($changesInfo->getData(), true);
case self::RESPONSE_HAS_CONTENT:
default:
$data = $this->extractData($response->getBody());
$changesInfo->setData(json_encode($data));
$changesInfo->setEtag($response->getHeader('Etag'));
$this->cacheResult($changesInfo, $version);
return $data;
}
}
protected function evaluateResponse(IResponse $response): int {
if ($response->getStatusCode() === 304) {
return self::RESPONSE_USE_CACHE;
} elseif ($response->getStatusCode() === 404) {
return self::RESPONSE_NO_CONTENT;
} elseif ($response->getStatusCode() === 200) {
return self::RESPONSE_HAS_CONTENT;
}
$this->logger->debug('Unexpected return code {code} from changelog server', [
'app' => 'core',
'code' => $response->getStatusCode(),
]);
return self::RESPONSE_NO_CONTENT;
}
protected function cacheResult(ChangesResult $entry, string $version) {
if ($entry->getVersion() === $version) {
$this->mapper->update($entry);
} else {
$entry->setVersion($version);
$this->mapper->insert($entry);
}
}
/**
* @throws \Exception
*/
protected function queryChangesServer(string $uri, ChangesResult $entry): IResponse {
$headers = [];
if ($entry->getEtag() !== '') {
$headers['If-None-Match'] = [$entry->getEtag()];
}
$entry->setLastCheck(time());
$client = $this->clientService->newClient();
return $client->get($uri, [
'headers' => $headers,
]);
}
protected function extractData($body):array {
$data = [];
if ($body) {
$loadEntities = libxml_disable_entity_loader(true);
$xml = @simplexml_load_string($body);
libxml_disable_entity_loader($loadEntities);
if ($xml !== false) {
$data['changelogURL'] = (string)$xml->changelog['href'];
$data['whatsNew'] = [];
foreach ($xml->whatsNew as $infoSet) {
$data['whatsNew'][(string)$infoSet['lang']] = [
'regular' => (array)$infoSet->regular->item,
'admin' => (array)$infoSet->admin->item,
];
}
} else {
libxml_clear_errors();
}
}
return $data;
}
/**
* returns a x.y.z form of the provided version. Extra numbers will be
* omitted, missing ones added as zeros.
*/
public function normalizeVersion(string $version): string {
$versionNumbers = array_slice(explode('.', $version), 0, 3);
$versionNumbers[0] = $versionNumbers[0] ?: '0'; // deal with empty input
while (count($versionNumbers) < 3) {
// changelog server expects x.y.z, pad 0 if it is too short
$versionNumbers[] = 0;
}
return implode('.', $versionNumbers);
}
}
|
