-
Notifications
You must be signed in to change notification settings - Fork 60
/
file_parser.php
342 lines (311 loc) · 10.4 KB
/
file_parser.php
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
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
<?php
/**
* File containing the ezcMailFileParser class
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
* @package Mail
* @version //autogen//
* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0
*/
/**
* Parses application/image/video and audio parts.
*
* @package Mail
* @version //autogen//
* @access private
*/
class ezcMailFileParser extends ezcMailPartParser
{
/**
* Default class to handle file attachments when parsing mails
* is ezcMailFile.
*
* Change this to your own file class with:
* <code>
* $parser = new ezcMailParser();
* $parser->options->fileClass = 'myCustomFileClass';
* // call $parser->parseMail( $set );
* </code>
*
* where myCustomFileClass extends ezcMailFile.
*
* @var string
*/
public static $fileClass = 'ezcMailFile';
/**
* Holds the headers for this part.
*
* @var ezcMailHeadersHolder
*/
private $headers = null;
/**
* Holds the maintype of the parsed part.
*
* @var string
*/
private $mainType = null;
/**
* Holds the subtype of the parsed part.
*
* @var string
*/
private $subType = null;
/**
* Holds the filepointer to the attachment.
*
* @var resource
*/
private $fp = null;
/**
* Holds the full path and filename of the file to save to.
*
* @var string
*/
private $fileName = null;
/**
* Static counter used to generate unique directory names.
*
* @var int
*/
private static $counter = 1;
/**
* Holds if data has been written to the output file or not.
*
* This is used for delayed filter adding neccessary for quoted-printable.
*
* @var bool
*/
private $dataWritten = false;
/**
* Constructs a new ezcMailFileParser with maintype $mainType subtype $subType
* and headers $headers.
*
* @throws ezcBaseFileNotFoundException
* if the file attachment file could not be openened.
* @param string $mainType
* @param string $subType
* @param ezcMailHeadersHolder $headers
*/
public function __construct( $mainType, $subType, ezcMailHeadersHolder $headers )
{
$this->mainType = $mainType;
$this->subType = $subType;
$this->headers = $headers;
// figure out the base filename
// search Content-Disposition first as specified by RFC 2183
$matches = array();
if (
$this->headers['Content-Disposition'] &&
preg_match( '/\s*filename=\s?"?([^;"]*);?/i', $this->headers['Content-Disposition'], $matches )
) {
$fileName = trim( $matches[1], '"' );
}
// fallback to the name parameter in Content-Type as specified by RFC 2046 4.5.1
else if ( preg_match( '/\s*name=\s?"?([^;"]*);?/i',
$this->headers['Content-Type'], $matches ) )
{
$fileName = trim( $matches[1], '"' );
}
else // default
{
$fileName = "filename";
}
if ( empty( $fileName ) ) // $fileName can be empty in reality, then the openFile() call fails because it's trying to open a directory with fopen
{
$fileName = "filename";
}
// clean file name (replace unsafe characters with underscores)
$fileName = preg_replace( '/[^A-Za-z0-9-. ]/', '_', $fileName );
if ( strlen( $fileName ) > 200 )
{
$fileName = substr( $fileName, 0, 200 ) . '.' . pathinfo( $fileName, PATHINFO_EXTENSION );
}
$this->fp = $this->openFile( $fileName ); // propagate exception
}
/**
* Returns the filepointer of the opened file $fileName in a unique directory..
*
* This method will create a new unique folder in the temporary directory specified in ezcMailParser.
* The fileName property of this class will be set to the location of the new file.
*
* @throws ezcBaseFileNotFoundException
* if the file could not be opened.
* @param string $fileName
* @return resource
*/
private function openFile( $fileName )
{
// The filename is now relative, we need to extend it with the absolute path.
// To provide uniqueness we put the file in a directory based on processID and rand.
$dirName = ezcMailParser::getTmpDir() . getmypid() . '-' . self::$counter++ . '/';
if ( !is_dir( $dirName ) )
{
mkdir( $dirName, 0700 );
}
// remove the directory and the file when PHP shuts down
ezcMailParserShutdownHandler::registerForRemoval( $dirName );
$this->fileName = $dirName . $fileName;
$fp = @fopen( $this->fileName, 'w' );
if ( $fp === false )
{
throw new ezcBaseFileNotFoundException( $this->fileName );
}
return $fp;
}
/**
* Destructs the parser object.
*
* Closes and removes any open file.
*/
public function __destruct()
{
// finish() was not called. The mail is completely broken.
// we will clean up the mess
if ( is_resource( $this->fp ) )
{
fclose( $this->fp );
$this->fp = null;
if ( $this->fileName !== null && file_exists( $this->fileName ) )
{
unlink( $this->fileName );
}
}
}
/**
* Sets the correct stream filters for the attachment.
*
* $line should contain one line of data that should be written to file.
* It is used to correctly determine the type of linebreak used in the mail.
*
* @param string $line
*/
private function appendStreamFilters( $line )
{
if ( ! is_string( $this->headers['Content-Transfer-Encoding'] ) )
{
return;
}
// append the correct decoding filter
switch ( strtolower( $this->headers['Content-Transfer-Encoding'] ) )
{
case 'base64':
stream_filter_append( $this->fp, 'convert.base64-decode' );
break;
case 'quoted-printable':
// fetch the type of linebreak
preg_match( "/(\r\n|\r|\n)$/", $line, $matches );
$lb = count( $matches ) > 0 ? $matches[0] : ezcMailTools::lineBreak();
$param = array( 'line-break-chars' => $lb );
stream_filter_append( $this->fp, 'convert.quoted-printable-decode',
STREAM_FILTER_WRITE, $param );
break;
case '7bit':
case '8bit':
// do nothing here, file is already just binary
break;
default:
// 7bit default
break;
}
}
/**
* Parse the body of a message line by line.
*
* This method is called by the parent part on a push basis. When there
* are no more lines the parent part will call finish() to retrieve the
* mailPart.
*
* The file will be decoded and saved to the given temporary directory within
* a directory based on the process ID and the time.
*
* @param string $line
*/
public function parseBody( $line )
{
if ( $line !== '' )
{
if ( $this->dataWritten === false )
{
$this->appendStreamFilters( $line );
$this->dataWritten = true;
}
fwrite( $this->fp, $line );
}
}
/**
* Return the result of the parsed file part.
*
* This method is called automatically by the parent part.
*
* @return ezcMailFile
*/
public function finish()
{
fclose( $this->fp );
$this->fp = null;
// FIXME: DIRTY PGP HACK
// When we have PGP support these lines should be removed. They are here now to hide
// PGP parts since they will show up as file attachments if not.
if ( $this->mainType == "application" &&
( $this->subType == 'pgp-signature'
|| $this->subType == 'pgp-keys'
|| $this->subType == 'pgp-encrypted' ) )
{
return null;
}
// END DIRTY PGP HACK
$filePart = new self::$fileClass( $this->fileName );
// set content type
$filePart->setHeaders( $this->headers->getCaseSensitiveArray() );
ezcMailPartParser::parsePartHeaders( $this->headers, $filePart );
switch ( strtolower( $this->mainType ) )
{
case 'image':
$filePart->contentType = ezcMailFile::CONTENT_TYPE_IMAGE;
break;
case 'audio':
$filePart->contentType = ezcMailFile::CONTENT_TYPE_AUDIO;
break;
case 'video':
$filePart->contentType = ezcMailFile::CONTENT_TYPE_VIDEO;
break;
case 'application':
$filePart->contentType = ezcMailFile::CONTENT_TYPE_APPLICATION;
break;
}
// set mime type
$filePart->mimeType = $this->subType;
// set inline disposition mode if set.
$matches = array();
if ( $this->headers['Content-Disposition'] )
{
if ( preg_match( '/^\s*inline;?/i', $this->headers['Content-Disposition'], $matches ) )
{
$filePart->dispositionType = ezcMailFile::DISPLAY_INLINE;
}
if ( preg_match( '/^\s*attachment;?/i', $this->headers['Content-Disposition'], $matches ) )
{
$filePart->dispositionType = ezcMailFile::DISPLAY_ATTACHMENT;
}
}
$filePart->size = filesize( $this->fileName );
return $filePart;
}
}
?>