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1 | <?php |
2 | /** |
3 | * This program is free software; you can redistribute it and/or modify |
4 | * it under the terms of the GNU General Public License as published by |
5 | * the Free Software Foundation; either version 2 of the License, or |
6 | * (at your option) any later version. |
7 | * |
8 | * This program is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
11 | * GNU General Public License for more details. |
12 | * |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
16 | * http://www.gnu.org/copyleft/gpl.html |
17 | * |
18 | * @file |
19 | */ |
20 | |
21 | use MediaWiki\SpecialPage\SpecialPage; |
22 | |
23 | /** |
24 | * @ingroup Upload |
25 | */ |
26 | class UploadStashFile extends UnregisteredLocalFile { |
27 | /** @var string */ |
28 | private $fileKey; |
29 | /** @var string|null Lazy set as in-memory cache */ |
30 | private $urlName; |
31 | /** @var string|null Lazy set as in-memory cache */ |
32 | protected $url; |
33 | /** @var string|null */ |
34 | private $sha1; |
35 | |
36 | /** |
37 | * A LocalFile wrapper around a file that has been temporarily stashed, |
38 | * so we can do things like create thumbnails for it. Arguably |
39 | * UnregisteredLocalFile should be handling its own file repo but that |
40 | * class is a bit retarded currently. |
41 | * |
42 | * @param FileRepo $repo Repository where we should find the path |
43 | * @param string $path Path to file |
44 | * @param string $key Key to store the path and any stashed data under |
45 | * @param string|null $sha1 SHA1 of file. Will calculate if not set |
46 | * @throws UploadStashBadPathException |
47 | * @throws UploadStashFileNotFoundException |
48 | */ |
49 | public function __construct( $repo, $path, $key, $sha1 = null ) { |
50 | $this->fileKey = $key; |
51 | $this->sha1 = $sha1; |
52 | |
53 | // resolve mwrepo:// urls |
54 | if ( FileRepo::isVirtualUrl( $path ) ) { |
55 | $path = $repo->resolveVirtualUrl( $path ); |
56 | } else { |
57 | // check if path appears to be correct, no parent traversals, |
58 | // and is in this repo's temp zone. |
59 | $repoTempPath = $repo->getZonePath( 'temp' ); |
60 | if ( ( !$repo->validateFilename( $path ) ) || |
61 | !str_starts_with( $path, $repoTempPath ) |
62 | ) { |
63 | wfDebug( "UploadStash: tried to construct an UploadStashFile " |
64 | . "from a file that should already exist at '$path', but path is not valid" ); |
65 | throw new UploadStashBadPathException( |
66 | wfMessage( 'uploadstash-bad-path-invalid' ) |
67 | ); |
68 | } |
69 | |
70 | // check if path exists! and is a plain file. |
71 | if ( !$repo->fileExists( $path ) ) { |
72 | wfDebug( "UploadStash: tried to construct an UploadStashFile from " |
73 | . "a file that should already exist at '$path', but path is not found" ); |
74 | throw new UploadStashFileNotFoundException( |
75 | wfMessage( 'uploadstash-file-not-found-not-exists' ) |
76 | ); |
77 | } |
78 | } |
79 | |
80 | parent::__construct( false, $repo, $path, false ); |
81 | |
82 | $this->name = basename( $this->path ); |
83 | } |
84 | |
85 | /** |
86 | * Get the SHA-1 base 36 hash |
87 | * |
88 | * This can be expensive on large files, so cache the value |
89 | * @return string|false |
90 | */ |
91 | public function getSha1() { |
92 | if ( !$this->sha1 ) { |
93 | $this->sha1 = parent::getSha1(); |
94 | } |
95 | return $this->sha1; |
96 | } |
97 | |
98 | /** |
99 | * A method needed by the file transforming and scaling routines in File.php |
100 | * We do not necessarily care about doing the description at this point |
101 | * However, we also can't return the empty string, as the rest of MediaWiki |
102 | * demands this (and calls to imagemagick convert require it to be there) |
103 | * |
104 | * @return string Dummy value |
105 | */ |
106 | public function getDescriptionUrl() { |
107 | return $this->getUrl(); |
108 | } |
109 | |
110 | /** |
111 | * Get the path for the thumbnail (actually any transformation of this file) |
112 | * The actual argument is the result of thumbName although we seem to have |
113 | * buggy code elsewhere that expects a boolean 'suffix' |
114 | * |
115 | * @param string|false $thumbName Name of thumbnail (e.g. "120px-123456.jpg" ), |
116 | * or false to just get the path |
117 | * @return string Path thumbnail should take on filesystem, or containing |
118 | * directory if thumbname is false |
119 | */ |
120 | public function getThumbPath( $thumbName = false ) { |
121 | $path = dirname( $this->path ); |
122 | if ( $thumbName !== false ) { |
123 | $path .= "/$thumbName"; |
124 | } |
125 | |
126 | return $path; |
127 | } |
128 | |
129 | /** |
130 | * Return the file/url base name of a thumbnail with the specified parameters. |
131 | * We override this because we want to use the pretty url name instead of the |
132 | * ugly file name. |
133 | * |
134 | * @param array $params Handler-specific parameters |
135 | * @param int $flags Bitfield that supports THUMB_* constants |
136 | * @return string|null Base name for URL, like '120px-12345.jpg', or null if there is no handler |
137 | */ |
138 | public function thumbName( $params, $flags = 0 ) { |
139 | return $this->generateThumbName( $this->getUrlName(), $params ); |
140 | } |
141 | |
142 | /** |
143 | * Helper function -- given a 'subpage', return the local URL, |
144 | * e.g. /wiki/Special:UploadStash/subpage |
145 | * @param string $subPage |
146 | * @return string Local URL for this subpage in the Special:UploadStash space. |
147 | */ |
148 | private function getSpecialUrl( $subPage ) { |
149 | return SpecialPage::getTitleFor( 'UploadStash', $subPage )->getLocalURL(); |
150 | } |
151 | |
152 | /** |
153 | * Get a URL to access the thumbnail |
154 | * This is required because the model of how files work requires that |
155 | * the thumbnail urls be predictable. However, in our model the URL is |
156 | * not based on the filename (that's hidden in the db) |
157 | * |
158 | * @param string|false $thumbName Basename of thumbnail file -- however, we don't |
159 | * want to use the file exactly |
160 | * @return string URL to access thumbnail, or URL with partial path |
161 | */ |
162 | public function getThumbUrl( $thumbName = false ) { |
163 | wfDebug( __METHOD__ . " getting for $thumbName" ); |
164 | |
165 | return $this->getSpecialUrl( 'thumb/' . $this->getUrlName() . '/' . $thumbName ); |
166 | } |
167 | |
168 | /** |
169 | * The basename for the URL, which we want to not be related to the filename. |
170 | * Will also be used as the lookup key for a thumbnail file. |
171 | * |
172 | * @return string Base url name, like '120px-123456.jpg' |
173 | */ |
174 | public function getUrlName() { |
175 | if ( !$this->urlName ) { |
176 | $this->urlName = $this->fileKey; |
177 | } |
178 | |
179 | return $this->urlName; |
180 | } |
181 | |
182 | /** |
183 | * Return the URL of the file, if for some reason we wanted to download it |
184 | * We tend not to do this for the original file, but we do want thumb icons |
185 | * |
186 | * @return string Url |
187 | */ |
188 | public function getUrl() { |
189 | if ( !isset( $this->url ) ) { |
190 | $this->url = $this->getSpecialUrl( 'file/' . $this->getUrlName() ); |
191 | } |
192 | |
193 | return $this->url; |
194 | } |
195 | |
196 | /** |
197 | * Parent classes use this method, for no obvious reason, to return the path |
198 | * (relative to wiki root, I assume). But with this class, the URL is |
199 | * unrelated to the path. |
200 | * |
201 | * @return string Url |
202 | */ |
203 | public function getFullUrl() { |
204 | return $this->getUrl(); |
205 | } |
206 | |
207 | /** |
208 | * Getter for file key (the unique id by which this file's location & |
209 | * metadata is stored in the db) |
210 | * |
211 | * @return string File key |
212 | */ |
213 | public function getFileKey() { |
214 | return $this->fileKey; |
215 | } |
216 | |
217 | /** |
218 | * Remove the associated temporary file |
219 | * @return bool Success |
220 | */ |
221 | public function remove() { |
222 | if ( !$this->repo->fileExists( $this->path ) ) { |
223 | // Maybe the file's already been removed? This could totally happen in UploadBase. |
224 | return true; |
225 | } |
226 | |
227 | return $this->repo->freeTemp( $this->path ); |
228 | } |
229 | |
230 | public function exists() { |
231 | return $this->repo->fileExists( $this->path ); |
232 | } |
233 | } |