summaryrefslogtreecommitdiffstats
path: root/lib/private/filechunking.php
blob: 09b30af48b28e0395af6a38c317a963d4feee2ad (plain)
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
<?php
/**
 * Copyright (c) 2012 Bart Visscher <bartv@thisnet.nl>
 * This file is licensed under the Affero General Public License version 3 or
 * later.
 * See the COPYING-README file.
 */


class OC_FileChunking {
	protected $info;
	protected $cache;

	static public function decodeName($name) {
		preg_match('/(?P<name>.*)-chunking-(?P<transferid>\d+)-(?P<chunkcount>\d+)-(?P<index>\d+)/', $name, $matches);
		return $matches;
	}

	/**
	 * @param string[] $info
	 */
	public function __construct($info) {
		$this->info = $info;
	}

	public function getPrefix() {
		$name = $this->info['name'];
		$transferid = $this->info['transferid'];

		return $name.'-chunking-'.$transferid.'-';
	}

	protected function getCache() {
		if (!isset($this->cache)) {
			$this->cache = new \OC\Cache\File();
		}
		return $this->cache;
	}

	/**
	 * Stores the given $data under the given $key - the number of stored bytes is returned
	 *
	 * @param string $index
	 * @param $data
	 * @return int
	 */
	public function store($index, $data) {
		$cache = $this->getCache();
		$name = $this->getPrefix().$index;
		$cache->set($name, $data);

		return $cache->size($name);
	}

	public function isComplete() {
		$prefix = $this->getPrefix();
		$parts = 0;
		$cache = $this->getCache();
		for($i=0; $i < $this->info['chunkcount']; $i++) {
			if ($cache->hasKey($prefix.$i)) {
				$parts ++;
			}
		}
		return $parts == $this->info['chunkcount'];
	}

	public function assemble($f) {
		$cache = $this->getCache();
		$prefix = $this->getPrefix();
		$count = 0;
		for($i=0; $i < $this->info['chunkcount']; $i++) {
			$chunk = $cache->get($prefix.$i);
			$count += fwrite($f, $chunk);
		}

		$this->cleanup();
		return $count;
	}

	/**
	 * Removes all chunks which belong to this transmission
	 */
	public function cleanup() {
		$cache = $this->getCache();
		$prefix = $this->getPrefix();
		for($i=0; $i < $this->info['chunkcount']; $i++) {
			$cache->remove($prefix.$i);
		}
	}

	/**
	 * Removes one specific chunk
	 * @param string $index
	 */
	public function remove($index) {
		$cache = $this->getCache();
		$prefix = $this->getPrefix();
		$cache->remove($prefix.$index);
	}

	public function signature_split($orgfile, $input) {
		$info = unpack('n', fread($input, 2));
		$blocksize = $info[1];
		$this->info['transferid'] = mt_rand();
		$count = 0;
		$needed = array();
		$cache = $this->getCache();
		$prefix = $this->getPrefix();
		while (!feof($orgfile)) {
			$new_md5 = fread($input, 16);
			if (feof($input)) {
				break;
			}
			$data = fread($orgfile, $blocksize);
			$org_md5 = md5($data, true);
			if ($org_md5 == $new_md5) {
				$cache->set($prefix.$count, $data);
			} else {
				$needed[] = $count;
			}
			$count++;
		}
		return array(
			'transferid' => $this->info['transferid'],
			'needed' => $needed,
			'count' => $count,
		);
	}

	/**
	 * @param string $path
	 */
	public function file_assemble($path) {
		$absolutePath = \OC\Files\Filesystem::normalizePath(\OC\Files\Filesystem::getView()->getAbsolutePath($path));
		$data = '';
		// use file_put_contents as method because that best matches what this function does
		if (OC_FileProxy::runPreProxies('file_put_contents', $absolutePath, $data)
			&& \OC\Files\Filesystem::isValidPath($path)) {
			$path = \OC\Files\Filesystem::getView()->getRelativePath($absolutePath);
			$exists = \OC\Files\Filesystem::file_exists($path);
			$run = true;
			if(!$exists) {
				OC_Hook::emit(
					\OC\Files\Filesystem::CLASSNAME,
					\OC\Files\Filesystem::signal_create,
					array(
						\OC\Files\Filesystem::signal_param_path => $path,
						\OC\Files\Filesystem::signal_param_run => &$run
					)
				);
			}
			OC_Hook::emit(
				\OC\Files\Filesystem::CLASSNAME,
				\OC\Files\Filesystem::signal_write,
				array(
					\OC\Files\Filesystem::signal_param_path => $path,
					\OC\Files\Filesystem::signal_param_run => &$run
				)
			);
			if(!$run) {
				return false;
			}
			$target = \OC\Files\Filesystem::fopen($path, 'w');
			if($target) {
				$count = $this->assemble($target);
				fclose($target);
				if(!$exists) {
					OC_Hook::emit(
						\OC\Files\Filesystem::CLASSNAME,
						\OC\Files\Filesystem::signal_post_create,
						array( \OC\Files\Filesystem::signal_param_path => $path)
					);
				}
				OC_Hook::emit(
					\OC\Files\Filesystem::CLASSNAME,
					\OC\Files\Filesystem::signal_post_write,
					array( \OC\Files\Filesystem::signal_param_path => $path)
				);
				OC_FileProxy::runPostProxies('file_put_contents', $absolutePath, $count);
				return $count > 0;
			}else{
				return false;
			}
		}
	}
}