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1 | <?php |
2 | /** |
3 | * Simulation of a backend storage in memory. |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by |
7 | * the Free Software Foundation; either version 2 of the License, or |
8 | * (at your option) any later version. |
9 | * |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * GNU General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU General Public License along |
16 | * with this program; if not, write to the Free Software Foundation, Inc., |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
18 | * http://www.gnu.org/copyleft/gpl.html |
19 | * |
20 | * @file |
21 | * @ingroup FileBackend |
22 | */ |
23 | |
24 | namespace Wikimedia\FileBackend; |
25 | |
26 | use Wikimedia\AtEase\AtEase; |
27 | use Wikimedia\Timestamp\ConvertibleTimestamp; |
28 | |
29 | /** |
30 | * Simulation of a backend storage in memory. |
31 | * |
32 | * All data in the backend is automatically deleted at the end of PHP execution. |
33 | * Since the data stored here is volatile, this is only useful for staging or testing. |
34 | * |
35 | * @ingroup FileBackend |
36 | * @since 1.23 |
37 | */ |
38 | class MemoryFileBackend extends FileBackendStore { |
39 | /** @var array Map of (file path => (data,mtime) */ |
40 | protected $files = []; |
41 | |
42 | public function getFeatures() { |
43 | return self::ATTR_UNICODE_PATHS; |
44 | } |
45 | |
46 | public function isPathUsableInternal( $storagePath ) { |
47 | return ( $this->resolveHashKey( $storagePath ) !== null ); |
48 | } |
49 | |
50 | protected function doCreateInternal( array $params ) { |
51 | $status = $this->newStatus(); |
52 | |
53 | $dst = $this->resolveHashKey( $params['dst'] ); |
54 | if ( $dst === null ) { |
55 | $status->fatal( 'backend-fail-invalidpath', $params['dst'] ); |
56 | |
57 | return $status; |
58 | } |
59 | |
60 | $this->files[$dst] = [ |
61 | 'data' => $params['content'], |
62 | 'mtime' => ConvertibleTimestamp::convert( TS_MW, time() ) |
63 | ]; |
64 | |
65 | return $status; |
66 | } |
67 | |
68 | protected function doStoreInternal( array $params ) { |
69 | $status = $this->newStatus(); |
70 | |
71 | $dst = $this->resolveHashKey( $params['dst'] ); |
72 | if ( $dst === null ) { |
73 | $status->fatal( 'backend-fail-invalidpath', $params['dst'] ); |
74 | |
75 | return $status; |
76 | } |
77 | |
78 | AtEase::suppressWarnings(); |
79 | $data = file_get_contents( $params['src'] ); |
80 | AtEase::restoreWarnings(); |
81 | if ( $data === false ) { // source doesn't exist? |
82 | $status->fatal( 'backend-fail-store', $params['src'], $params['dst'] ); |
83 | |
84 | return $status; |
85 | } |
86 | |
87 | $this->files[$dst] = [ |
88 | 'data' => $data, |
89 | 'mtime' => ConvertibleTimestamp::convert( TS_MW, time() ) |
90 | ]; |
91 | |
92 | return $status; |
93 | } |
94 | |
95 | protected function doCopyInternal( array $params ) { |
96 | $status = $this->newStatus(); |
97 | |
98 | $src = $this->resolveHashKey( $params['src'] ); |
99 | if ( $src === null ) { |
100 | $status->fatal( 'backend-fail-invalidpath', $params['src'] ); |
101 | |
102 | return $status; |
103 | } |
104 | |
105 | $dst = $this->resolveHashKey( $params['dst'] ); |
106 | if ( $dst === null ) { |
107 | $status->fatal( 'backend-fail-invalidpath', $params['dst'] ); |
108 | |
109 | return $status; |
110 | } |
111 | |
112 | if ( !isset( $this->files[$src] ) ) { |
113 | if ( empty( $params['ignoreMissingSource'] ) ) { |
114 | $status->fatal( 'backend-fail-copy', $params['src'], $params['dst'] ); |
115 | } |
116 | |
117 | return $status; |
118 | } |
119 | |
120 | $this->files[$dst] = [ |
121 | 'data' => $this->files[$src]['data'], |
122 | 'mtime' => ConvertibleTimestamp::convert( TS_MW, time() ) |
123 | ]; |
124 | |
125 | return $status; |
126 | } |
127 | |
128 | protected function doMoveInternal( array $params ) { |
129 | $status = $this->newStatus(); |
130 | |
131 | $src = $this->resolveHashKey( $params['src'] ); |
132 | if ( $src === null ) { |
133 | $status->fatal( 'backend-fail-invalidpath', $params['src'] ); |
134 | |
135 | return $status; |
136 | } |
137 | |
138 | $dst = $this->resolveHashKey( $params['dst'] ); |
139 | if ( $dst === null ) { |
140 | $status->fatal( 'backend-fail-invalidpath', $params['dst'] ); |
141 | |
142 | return $status; |
143 | } |
144 | |
145 | if ( !isset( $this->files[$src] ) ) { |
146 | if ( empty( $params['ignoreMissingSource'] ) ) { |
147 | $status->fatal( 'backend-fail-move', $params['src'], $params['dst'] ); |
148 | } |
149 | |
150 | return $status; |
151 | } |
152 | |
153 | $this->files[$dst] = $this->files[$src]; |
154 | unset( $this->files[$src] ); |
155 | $this->files[$dst]['mtime'] = ConvertibleTimestamp::convert( TS_MW, time() ); |
156 | |
157 | return $status; |
158 | } |
159 | |
160 | protected function doDeleteInternal( array $params ) { |
161 | $status = $this->newStatus(); |
162 | |
163 | $src = $this->resolveHashKey( $params['src'] ); |
164 | if ( $src === null ) { |
165 | $status->fatal( 'backend-fail-invalidpath', $params['src'] ); |
166 | |
167 | return $status; |
168 | } |
169 | |
170 | if ( !isset( $this->files[$src] ) ) { |
171 | if ( empty( $params['ignoreMissingSource'] ) ) { |
172 | $status->fatal( 'backend-fail-delete', $params['src'] ); |
173 | } |
174 | |
175 | return $status; |
176 | } |
177 | |
178 | unset( $this->files[$src] ); |
179 | |
180 | return $status; |
181 | } |
182 | |
183 | protected function doGetFileStat( array $params ) { |
184 | $src = $this->resolveHashKey( $params['src'] ); |
185 | if ( $src === null ) { |
186 | return self::RES_ERROR; // invalid path |
187 | } |
188 | |
189 | if ( isset( $this->files[$src] ) ) { |
190 | return [ |
191 | 'mtime' => $this->files[$src]['mtime'], |
192 | 'size' => strlen( $this->files[$src]['data'] ), |
193 | ]; |
194 | } |
195 | |
196 | return self::RES_ABSENT; |
197 | } |
198 | |
199 | protected function doGetLocalCopyMulti( array $params ) { |
200 | $tmpFiles = []; // (path => TempFSFile) |
201 | foreach ( $params['srcs'] as $srcPath ) { |
202 | $src = $this->resolveHashKey( $srcPath ); |
203 | if ( $src === null ) { |
204 | $fsFile = self::RES_ERROR; |
205 | } elseif ( !isset( $this->files[$src] ) ) { |
206 | $fsFile = self::RES_ABSENT; |
207 | } else { |
208 | // Create a new temporary file with the same extension... |
209 | $ext = FileBackend::extensionFromPath( $src ); |
210 | $fsFile = $this->tmpFileFactory->newTempFSFile( 'localcopy_', $ext ); |
211 | if ( $fsFile ) { |
212 | $bytes = file_put_contents( $fsFile->getPath(), $this->files[$src]['data'] ); |
213 | if ( $bytes !== strlen( $this->files[$src]['data'] ) ) { |
214 | $fsFile = self::RES_ERROR; |
215 | } |
216 | } |
217 | } |
218 | $tmpFiles[$srcPath] = $fsFile; |
219 | } |
220 | |
221 | return $tmpFiles; |
222 | } |
223 | |
224 | protected function doDirectoryExists( $container, $dir, array $params ) { |
225 | $prefix = rtrim( "$container/$dir", '/' ) . '/'; |
226 | foreach ( $this->files as $path => $data ) { |
227 | if ( strpos( $path, $prefix ) === 0 ) { |
228 | return true; |
229 | } |
230 | } |
231 | |
232 | return false; |
233 | } |
234 | |
235 | public function getDirectoryListInternal( $container, $dir, array $params ) { |
236 | $dirs = []; |
237 | $prefix = rtrim( "$container/$dir", '/' ) . '/'; |
238 | $prefixLen = strlen( $prefix ); |
239 | foreach ( $this->files as $path => $data ) { |
240 | if ( strpos( $path, $prefix ) === 0 ) { |
241 | $relPath = substr( $path, $prefixLen ); |
242 | if ( $relPath === false ) { |
243 | continue; |
244 | } elseif ( strpos( $relPath, '/' ) === false ) { |
245 | continue; // just a file |
246 | } |
247 | $parts = array_slice( explode( '/', $relPath ), 0, -1 ); // last part is file name |
248 | if ( !empty( $params['topOnly'] ) ) { |
249 | $dirs[$parts[0]] = 1; // top directory |
250 | } else { |
251 | $current = ''; |
252 | foreach ( $parts as $part ) { // all directories |
253 | $dir = ( $current === '' ) ? $part : "$current/$part"; |
254 | $dirs[$dir] = 1; |
255 | $current = $dir; |
256 | } |
257 | } |
258 | } |
259 | } |
260 | |
261 | return array_keys( $dirs ); |
262 | } |
263 | |
264 | public function getFileListInternal( $container, $dir, array $params ) { |
265 | $files = []; |
266 | $prefix = rtrim( "$container/$dir", '/' ) . '/'; |
267 | $prefixLen = strlen( $prefix ); |
268 | foreach ( $this->files as $path => $data ) { |
269 | if ( strpos( $path, $prefix ) === 0 ) { |
270 | $relPath = substr( $path, $prefixLen ); |
271 | if ( $relPath === false ) { |
272 | continue; |
273 | } elseif ( !empty( $params['topOnly'] ) && strpos( $relPath, '/' ) !== false ) { |
274 | continue; |
275 | } |
276 | $files[] = $relPath; |
277 | } |
278 | } |
279 | |
280 | return $files; |
281 | } |
282 | |
283 | protected function directoriesAreVirtual() { |
284 | return true; |
285 | } |
286 | |
287 | /** |
288 | * Get the absolute file system path for a storage path |
289 | * |
290 | * @param string $storagePath |
291 | * @return string|null |
292 | */ |
293 | protected function resolveHashKey( $storagePath ) { |
294 | [ $fullCont, $relPath ] = $this->resolveStoragePathReal( $storagePath ); |
295 | if ( $relPath === null ) { |
296 | return null; // invalid |
297 | } |
298 | |
299 | return ( $relPath !== '' ) ? "$fullCont/$relPath" : $fullCont; |
300 | } |
301 | } |
302 | |
303 | /** @deprecated class alias since 1.43 */ |
304 | class_alias( MemoryFileBackend::class, 'MemoryFileBackend' ); |