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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 | use Wikimedia\AtEase\AtEase; |
| 25 | use Wikimedia\Timestamp\ConvertibleTimestamp; |
| 26 | |
| 27 | /** |
| 28 | * Simulation of a backend storage in memory. |
| 29 | * |
| 30 | * All data in the backend is automatically deleted at the end of PHP execution. |
| 31 | * Since the data stored here is volatile, this is only useful for staging or testing. |
| 32 | * |
| 33 | * @ingroup FileBackend |
| 34 | * @since 1.23 |
| 35 | */ |
| 36 | class MemoryFileBackend extends FileBackendStore { |
| 37 | /** @var array Map of (file path => (data,mtime) */ |
| 38 | protected $files = []; |
| 39 | |
| 40 | public function getFeatures() { |
| 41 | return self::ATTR_UNICODE_PATHS; |
| 42 | } |
| 43 | |
| 44 | public function isPathUsableInternal( $storagePath ) { |
| 45 | return ( $this->resolveHashKey( $storagePath ) !== null ); |
| 46 | } |
| 47 | |
| 48 | protected function doCreateInternal( array $params ) { |
| 49 | $status = $this->newStatus(); |
| 50 | |
| 51 | $dst = $this->resolveHashKey( $params['dst'] ); |
| 52 | if ( $dst === null ) { |
| 53 | $status->fatal( 'backend-fail-invalidpath', $params['dst'] ); |
| 54 | |
| 55 | return $status; |
| 56 | } |
| 57 | |
| 58 | $this->files[$dst] = [ |
| 59 | 'data' => $params['content'], |
| 60 | 'mtime' => ConvertibleTimestamp::convert( TS_MW, time() ) |
| 61 | ]; |
| 62 | |
| 63 | return $status; |
| 64 | } |
| 65 | |
| 66 | protected function doStoreInternal( array $params ) { |
| 67 | $status = $this->newStatus(); |
| 68 | |
| 69 | $dst = $this->resolveHashKey( $params['dst'] ); |
| 70 | if ( $dst === null ) { |
| 71 | $status->fatal( 'backend-fail-invalidpath', $params['dst'] ); |
| 72 | |
| 73 | return $status; |
| 74 | } |
| 75 | |
| 76 | AtEase::suppressWarnings(); |
| 77 | $data = file_get_contents( $params['src'] ); |
| 78 | AtEase::restoreWarnings(); |
| 79 | if ( $data === false ) { // source doesn't exist? |
| 80 | $status->fatal( 'backend-fail-store', $params['src'], $params['dst'] ); |
| 81 | |
| 82 | return $status; |
| 83 | } |
| 84 | |
| 85 | $this->files[$dst] = [ |
| 86 | 'data' => $data, |
| 87 | 'mtime' => ConvertibleTimestamp::convert( TS_MW, time() ) |
| 88 | ]; |
| 89 | |
| 90 | return $status; |
| 91 | } |
| 92 | |
| 93 | protected function doCopyInternal( array $params ) { |
| 94 | $status = $this->newStatus(); |
| 95 | |
| 96 | $src = $this->resolveHashKey( $params['src'] ); |
| 97 | if ( $src === null ) { |
| 98 | $status->fatal( 'backend-fail-invalidpath', $params['src'] ); |
| 99 | |
| 100 | return $status; |
| 101 | } |
| 102 | |
| 103 | $dst = $this->resolveHashKey( $params['dst'] ); |
| 104 | if ( $dst === null ) { |
| 105 | $status->fatal( 'backend-fail-invalidpath', $params['dst'] ); |
| 106 | |
| 107 | return $status; |
| 108 | } |
| 109 | |
| 110 | if ( !isset( $this->files[$src] ) ) { |
| 111 | if ( empty( $params['ignoreMissingSource'] ) ) { |
| 112 | $status->fatal( 'backend-fail-copy', $params['src'], $params['dst'] ); |
| 113 | } |
| 114 | |
| 115 | return $status; |
| 116 | } |
| 117 | |
| 118 | $this->files[$dst] = [ |
| 119 | 'data' => $this->files[$src]['data'], |
| 120 | 'mtime' => ConvertibleTimestamp::convert( TS_MW, time() ) |
| 121 | ]; |
| 122 | |
| 123 | return $status; |
| 124 | } |
| 125 | |
| 126 | protected function doMoveInternal( array $params ) { |
| 127 | $status = $this->newStatus(); |
| 128 | |
| 129 | $src = $this->resolveHashKey( $params['src'] ); |
| 130 | if ( $src === null ) { |
| 131 | $status->fatal( 'backend-fail-invalidpath', $params['src'] ); |
| 132 | |
| 133 | return $status; |
| 134 | } |
| 135 | |
| 136 | $dst = $this->resolveHashKey( $params['dst'] ); |
| 137 | if ( $dst === null ) { |
| 138 | $status->fatal( 'backend-fail-invalidpath', $params['dst'] ); |
| 139 | |
| 140 | return $status; |
| 141 | } |
| 142 | |
| 143 | if ( !isset( $this->files[$src] ) ) { |
| 144 | if ( empty( $params['ignoreMissingSource'] ) ) { |
| 145 | $status->fatal( 'backend-fail-move', $params['src'], $params['dst'] ); |
| 146 | } |
| 147 | |
| 148 | return $status; |
| 149 | } |
| 150 | |
| 151 | $this->files[$dst] = $this->files[$src]; |
| 152 | unset( $this->files[$src] ); |
| 153 | $this->files[$dst]['mtime'] = ConvertibleTimestamp::convert( TS_MW, time() ); |
| 154 | |
| 155 | return $status; |
| 156 | } |
| 157 | |
| 158 | protected function doDeleteInternal( array $params ) { |
| 159 | $status = $this->newStatus(); |
| 160 | |
| 161 | $src = $this->resolveHashKey( $params['src'] ); |
| 162 | if ( $src === null ) { |
| 163 | $status->fatal( 'backend-fail-invalidpath', $params['src'] ); |
| 164 | |
| 165 | return $status; |
| 166 | } |
| 167 | |
| 168 | if ( !isset( $this->files[$src] ) ) { |
| 169 | if ( empty( $params['ignoreMissingSource'] ) ) { |
| 170 | $status->fatal( 'backend-fail-delete', $params['src'] ); |
| 171 | } |
| 172 | |
| 173 | return $status; |
| 174 | } |
| 175 | |
| 176 | unset( $this->files[$src] ); |
| 177 | |
| 178 | return $status; |
| 179 | } |
| 180 | |
| 181 | protected function doGetFileStat( array $params ) { |
| 182 | $src = $this->resolveHashKey( $params['src'] ); |
| 183 | if ( $src === null ) { |
| 184 | return self::RES_ERROR; // invalid path |
| 185 | } |
| 186 | |
| 187 | if ( isset( $this->files[$src] ) ) { |
| 188 | return [ |
| 189 | 'mtime' => $this->files[$src]['mtime'], |
| 190 | 'size' => strlen( $this->files[$src]['data'] ), |
| 191 | ]; |
| 192 | } |
| 193 | |
| 194 | return self::RES_ABSENT; |
| 195 | } |
| 196 | |
| 197 | protected function doGetLocalCopyMulti( array $params ) { |
| 198 | $tmpFiles = []; // (path => TempFSFile) |
| 199 | foreach ( $params['srcs'] as $srcPath ) { |
| 200 | $src = $this->resolveHashKey( $srcPath ); |
| 201 | if ( $src === null ) { |
| 202 | $fsFile = self::RES_ERROR; |
| 203 | } elseif ( !isset( $this->files[$src] ) ) { |
| 204 | $fsFile = self::RES_ABSENT; |
| 205 | } else { |
| 206 | // Create a new temporary file with the same extension... |
| 207 | $ext = FileBackend::extensionFromPath( $src ); |
| 208 | $fsFile = $this->tmpFileFactory->newTempFSFile( 'localcopy_', $ext ); |
| 209 | if ( $fsFile ) { |
| 210 | $bytes = file_put_contents( $fsFile->getPath(), $this->files[$src]['data'] ); |
| 211 | if ( $bytes !== strlen( $this->files[$src]['data'] ) ) { |
| 212 | $fsFile = self::RES_ERROR; |
| 213 | } |
| 214 | } |
| 215 | } |
| 216 | $tmpFiles[$srcPath] = $fsFile; |
| 217 | } |
| 218 | |
| 219 | return $tmpFiles; |
| 220 | } |
| 221 | |
| 222 | protected function doDirectoryExists( $container, $dir, array $params ) { |
| 223 | $prefix = rtrim( "$container/$dir", '/' ) . '/'; |
| 224 | foreach ( $this->files as $path => $data ) { |
| 225 | if ( strpos( $path, $prefix ) === 0 ) { |
| 226 | return true; |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | return false; |
| 231 | } |
| 232 | |
| 233 | public function getDirectoryListInternal( $container, $dir, array $params ) { |
| 234 | $dirs = []; |
| 235 | $prefix = rtrim( "$container/$dir", '/' ) . '/'; |
| 236 | $prefixLen = strlen( $prefix ); |
| 237 | foreach ( $this->files as $path => $data ) { |
| 238 | if ( strpos( $path, $prefix ) === 0 ) { |
| 239 | $relPath = substr( $path, $prefixLen ); |
| 240 | if ( $relPath === false ) { |
| 241 | continue; |
| 242 | } elseif ( strpos( $relPath, '/' ) === false ) { |
| 243 | continue; // just a file |
| 244 | } |
| 245 | $parts = array_slice( explode( '/', $relPath ), 0, -1 ); // last part is file name |
| 246 | if ( !empty( $params['topOnly'] ) ) { |
| 247 | $dirs[$parts[0]] = 1; // top directory |
| 248 | } else { |
| 249 | $current = ''; |
| 250 | foreach ( $parts as $part ) { // all directories |
| 251 | $dir = ( $current === '' ) ? $part : "$current/$part"; |
| 252 | $dirs[$dir] = 1; |
| 253 | $current = $dir; |
| 254 | } |
| 255 | } |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | return array_keys( $dirs ); |
| 260 | } |
| 261 | |
| 262 | public function getFileListInternal( $container, $dir, array $params ) { |
| 263 | $files = []; |
| 264 | $prefix = rtrim( "$container/$dir", '/' ) . '/'; |
| 265 | $prefixLen = strlen( $prefix ); |
| 266 | foreach ( $this->files as $path => $data ) { |
| 267 | if ( strpos( $path, $prefix ) === 0 ) { |
| 268 | $relPath = substr( $path, $prefixLen ); |
| 269 | if ( $relPath === false ) { |
| 270 | continue; |
| 271 | } elseif ( !empty( $params['topOnly'] ) && strpos( $relPath, '/' ) !== false ) { |
| 272 | continue; |
| 273 | } |
| 274 | $files[] = $relPath; |
| 275 | } |
| 276 | } |
| 277 | |
| 278 | return $files; |
| 279 | } |
| 280 | |
| 281 | protected function directoriesAreVirtual() { |
| 282 | return true; |
| 283 | } |
| 284 | |
| 285 | /** |
| 286 | * Get the absolute file system path for a storage path |
| 287 | * |
| 288 | * @param string $storagePath |
| 289 | * @return string|null |
| 290 | */ |
| 291 | protected function resolveHashKey( $storagePath ) { |
| 292 | [ $fullCont, $relPath ] = $this->resolveStoragePathReal( $storagePath ); |
| 293 | if ( $relPath === null ) { |
| 294 | return null; // invalid |
| 295 | } |
| 296 | |
| 297 | return ( $relPath !== '' ) ? "$fullCont/$relPath" : $fullCont; |
| 298 | } |
| 299 | } |