|
1
|
|
|
<?php |
|
2
|
|
|
/** |
|
3
|
|
|
* ownCloud - galleryplus |
|
4
|
|
|
* |
|
5
|
|
|
* This file is licensed under the Affero General Public License version 3 or |
|
6
|
|
|
* later. See the COPYING file. |
|
7
|
|
|
* |
|
8
|
|
|
* @author Olivier Paroz <[email protected]> |
|
9
|
|
|
* |
|
10
|
|
|
* @copyright Olivier Paroz 2014-2015 |
|
11
|
|
|
*/ |
|
12
|
|
|
|
|
13
|
|
|
namespace OCA\GalleryPlus\Service; |
|
14
|
|
|
|
|
15
|
|
|
use OCP\Files\File; |
|
16
|
|
|
use OCP\ILogger; |
|
17
|
|
|
|
|
18
|
|
|
use OCA\GalleryPlus\Environment\Environment; |
|
19
|
|
|
use OCA\GalleryPlus\Preview\Preview; |
|
20
|
|
|
|
|
21
|
|
|
/** |
|
22
|
|
|
* Generates previews |
|
23
|
|
|
* |
|
24
|
|
|
* @package OCA\GalleryPlus\Service |
|
25
|
|
|
*/ |
|
26
|
|
|
class PreviewService extends Service { |
|
27
|
|
|
|
|
28
|
|
|
use Base64Encode; |
|
29
|
|
|
|
|
30
|
|
|
/** @var Preview */ |
|
31
|
|
|
private $previewManager; |
|
32
|
|
|
|
|
33
|
|
|
/** |
|
34
|
|
|
* Constructor |
|
35
|
|
|
* |
|
36
|
|
|
* @param string $appName |
|
37
|
|
|
* @param Environment $environment |
|
38
|
|
|
* @param Preview $previewManager |
|
39
|
|
|
* @param ILogger $logger |
|
40
|
|
|
*/ |
|
41
|
27 |
|
public function __construct( |
|
42
|
|
|
$appName, |
|
43
|
|
|
Environment $environment, |
|
44
|
|
|
Preview $previewManager, |
|
45
|
|
|
ILogger $logger |
|
46
|
|
|
) { |
|
47
|
27 |
|
parent::__construct($appName, $environment, $logger); |
|
48
|
|
|
|
|
49
|
27 |
|
$this->previewManager = $previewManager; |
|
50
|
27 |
|
} |
|
51
|
|
|
|
|
52
|
|
|
/** |
|
53
|
|
|
* Decides if we should download the file instead of generating a preview |
|
54
|
|
|
* |
|
55
|
|
|
* @param File $file |
|
56
|
|
|
* @param bool $animatedPreview |
|
57
|
|
|
* |
|
58
|
|
|
* @return bool |
|
59
|
|
|
*/ |
|
60
|
16 |
|
public function isPreviewRequired($file, $animatedPreview) { |
|
61
|
16 |
|
$mime = $file->getMimeType(); |
|
62
|
|
|
|
|
63
|
16 |
|
if ($mime === 'image/svg+xml') { |
|
64
|
2 |
|
return $this->isSvgPreviewRequired(); |
|
65
|
|
|
} |
|
66
|
14 |
|
if ($mime === 'image/gif') { |
|
67
|
10 |
|
return $this->isGifPreviewRequired($file, $animatedPreview); |
|
68
|
|
|
} |
|
69
|
|
|
|
|
70
|
6 |
|
return true; |
|
71
|
|
|
} |
|
72
|
|
|
|
|
73
|
|
|
/** |
|
74
|
|
|
* Returns an array containing everything needed by the client to be able to display a preview |
|
75
|
|
|
* |
|
76
|
|
|
* * fileid: the file's ID |
|
77
|
|
|
* * mimetype: the file's media type |
|
78
|
|
|
* * preview: the preview's content |
|
79
|
|
|
* |
|
80
|
|
|
* Example logger |
|
81
|
|
|
* $this->logger->debug( |
|
82
|
|
|
* "[PreviewService] Path : {path} / mime: {mimetype} / fileid: {fileid}", |
|
83
|
|
|
* [ |
|
84
|
|
|
* 'path' => $preview['data']['path'], |
|
85
|
|
|
* 'mimetype' => $preview['data']['mimetype'], |
|
86
|
|
|
* 'fileid' => $preview['fileid'] |
|
87
|
|
|
* ] |
|
88
|
|
|
* ); |
|
89
|
|
|
* |
|
90
|
|
|
* @todo Get the max size from the settings |
|
91
|
|
|
* |
|
92
|
|
|
* @param File $file |
|
93
|
|
|
* @param int $maxX asked width for the preview |
|
94
|
|
|
* @param int $maxY asked height for the preview |
|
95
|
|
|
* @param bool $keepAspect |
|
96
|
|
|
* @param bool $base64Encode |
|
97
|
|
|
* |
|
98
|
|
|
* @return array <string,\OC_Image|string>|false preview data |
|
99
|
|
|
* @throws InternalServerErrorServiceException |
|
100
|
|
|
*/ |
|
101
|
8 |
|
public function createPreview( |
|
102
|
|
|
$file, $maxX = 0, $maxY = 0, $keepAspect = true, $base64Encode = false |
|
103
|
|
|
) { |
|
104
|
|
|
try { |
|
105
|
8 |
|
$userId = $this->environment->getUserId(); |
|
106
|
7 |
|
$imagePathFromFolder = $this->environment->getPathFromUserFolder($file); |
|
107
|
7 |
|
$this->previewManager->setupView($userId, $file, $imagePathFromFolder); |
|
108
|
7 |
|
$preview = $this->previewManager->preparePreview($maxX, $maxY, $keepAspect); |
|
109
|
7 |
|
if ($preview && $base64Encode) { |
|
110
|
3 |
|
$preview['preview'] = $this->encode($preview['preview']); |
|
111
|
|
|
} |
|
112
|
|
|
|
|
113
|
7 |
|
return $preview; |
|
114
|
1 |
|
} catch (\Exception $exception) { |
|
115
|
1 |
|
throw new InternalServerErrorServiceException('Preview generation has failed'); |
|
116
|
|
|
} |
|
117
|
|
|
} |
|
118
|
|
|
|
|
119
|
|
|
/** |
|
120
|
|
|
* Makes sure we return previews of the asked dimensions and fix the cache |
|
121
|
|
|
* if necessary |
|
122
|
|
|
* |
|
123
|
|
|
* @param bool $square |
|
124
|
|
|
* @param bool $base64Encode |
|
125
|
|
|
* |
|
126
|
|
|
* @return \OC_Image|string |
|
127
|
|
|
* @throws InternalServerErrorServiceException |
|
128
|
|
|
*/ |
|
129
|
8 |
|
public function previewValidator($square, $base64Encode) { |
|
130
|
|
|
try { |
|
131
|
8 |
|
$preview = $this->previewManager->previewValidator($square); |
|
132
|
7 |
|
if ($base64Encode) { |
|
133
|
5 |
|
$preview = $this->encode($preview); |
|
134
|
2 |
|
} |
|
135
|
|
|
|
|
136
|
7 |
|
return $preview; |
|
137
|
1 |
|
} catch (\Exception $exception) { |
|
138
|
1 |
|
throw new InternalServerErrorServiceException( |
|
139
|
|
|
'There was an error while trying to fix the preview' |
|
140
|
1 |
|
); |
|
141
|
|
|
} |
|
142
|
|
|
} |
|
143
|
|
|
|
|
144
|
|
|
/** |
|
145
|
|
|
* Returns true if the passed mime type is supported |
|
146
|
|
|
* |
|
147
|
|
|
* In case of a failure, we just return that the media type is not supported |
|
148
|
|
|
* |
|
149
|
|
|
* @param string $mimeType |
|
150
|
|
|
* |
|
151
|
|
|
* @return boolean |
|
152
|
|
|
*/ |
|
153
|
12 |
|
private function isMimeSupported($mimeType = '*') { |
|
154
|
|
|
try { |
|
155
|
12 |
|
return $this->previewManager->isMimeSupported($mimeType); |
|
156
|
1 |
|
} catch (\Exception $exception) { |
|
157
|
1 |
|
unset($exception); |
|
158
|
|
|
|
|
159
|
1 |
|
return false; |
|
160
|
|
|
} |
|
161
|
|
|
} |
|
162
|
|
|
|
|
163
|
|
|
/** |
|
164
|
|
|
* Decides if we should download the SVG or generate a preview |
|
165
|
|
|
* |
|
166
|
|
|
* SVGs are downloaded if the SVG converter is disabled |
|
167
|
|
|
* Files of any media type are downloaded if requested by the client |
|
168
|
|
|
* |
|
169
|
|
|
* @return bool |
|
170
|
|
|
*/ |
|
171
|
2 |
|
private function isSvgPreviewRequired() { |
|
172
|
2 |
|
return $this->isMimeSupported('image/svg+xml'); |
|
173
|
|
|
} |
|
174
|
|
|
|
|
175
|
|
|
/** |
|
176
|
|
|
* Decides if we should download the GIF or generate a preview |
|
177
|
|
|
* |
|
178
|
|
|
* GIFs are downloaded if they're animated and we want to show |
|
179
|
|
|
* animations |
|
180
|
|
|
* |
|
181
|
|
|
* @param File $file |
|
182
|
|
|
* @param bool $animatedPreview |
|
183
|
|
|
* |
|
184
|
|
|
* @return bool |
|
185
|
|
|
*/ |
|
186
|
10 |
|
private function isGifPreviewRequired($file, $animatedPreview) { |
|
187
|
10 |
|
$gifSupport = $this->isMimeSupported('image/gif'); |
|
188
|
10 |
|
$animatedGif = $this->isGifAnimated($file); |
|
189
|
|
|
|
|
190
|
9 |
|
return $gifSupport && !($animatedGif && $animatedPreview); |
|
191
|
|
|
} |
|
192
|
|
|
|
|
193
|
|
|
/** |
|
194
|
|
|
* Tests if a GIF is animated |
|
195
|
|
|
* |
|
196
|
|
|
* An animated gif contains multiple "frames", with each frame having a |
|
197
|
|
|
* header made up of: |
|
198
|
|
|
* * a static 4-byte sequence (\x00\x21\xF9\x04) |
|
199
|
|
|
* * 4 variable bytes |
|
200
|
|
|
* * a static 2-byte sequence (\x00\x2C) (Photoshop uses \x00\x21) |
|
201
|
|
|
* |
|
202
|
|
|
* We read through the file until we reach the end of the file, or we've |
|
203
|
|
|
* found at least 2 frame headers |
|
204
|
|
|
* |
|
205
|
|
|
* @link http://php.net/manual/en/function.imagecreatefromgif.php#104473 |
|
206
|
|
|
* |
|
207
|
|
|
* @param File $file |
|
208
|
|
|
* |
|
209
|
|
|
* @return bool |
|
210
|
|
|
* @throws InternalServerErrorServiceException |
|
211
|
|
|
*/ |
|
212
|
10 |
|
private function isGifAnimated($file) { |
|
213
|
10 |
|
$count = 0; |
|
214
|
|
|
try { |
|
215
|
10 |
|
$fileHandle = $file->fopen('rb'); |
|
216
|
9 |
|
if ($fileHandle) { |
|
217
|
9 |
|
while (!feof($fileHandle) && $count < 2) { |
|
218
|
9 |
|
$chunk = fread($fileHandle, 1024 * 100); //read 100kb at a time |
|
219
|
9 |
|
$count += preg_match_all( |
|
220
|
9 |
|
'#\x00\x21\xF9\x04.{4}\x00(\x2C|\x21)#s', $chunk, $matches |
|
221
|
9 |
|
); |
|
222
|
9 |
|
} |
|
223
|
9 |
|
fclose($fileHandle); |
|
224
|
9 |
|
} else { |
|
225
|
|
|
throw new \Exception(); |
|
226
|
|
|
} |
|
227
|
6 |
|
} catch (\Exception $exception) { |
|
228
|
1 |
|
throw new InternalServerErrorServiceException( |
|
229
|
1 |
|
'Something went wrong when trying to read' . $file->getPath() |
|
230
|
1 |
|
); |
|
231
|
|
|
} |
|
232
|
|
|
|
|
233
|
9 |
|
return $count > 1; |
|
234
|
|
|
} |
|
235
|
|
|
|
|
236
|
|
|
} |
|
237
|
|
|
|
interfasys /
galleryplus
