28fe5c809d957455bcb25e446ab0183fff915208
[squirrelmail.git] / src / download.php
1 <?php
2
3 /**
4 * download.php
5 *
6 * Copyright (c) 1999-2003 The SquirrelMail Project Team
7 * Licensed under the GNU GPL. For full terms see the file COPYING.
8 *
9 * Handles attachment downloads to the users computer.
10 * Also allows displaying of attachments when possible.
11 *
12 * $Id$
13 */
14
15 /* Path for SquirrelMail required files. */
16 define('SM_PATH','../');
17
18 /* SquirrelMail required files. */
19 require_once(SM_PATH . 'include/validate.php');
20 require_once(SM_PATH . 'functions/imap.php');
21 require_once(SM_PATH . 'functions/mime.php');
22
23 header('Pragma: ');
24 header('Cache-Control: cache');
25
26 /* globals */
27
28 $key = $_COOKIE['key'];
29 $username = $_SESSION['username'];
30 $onetimepad = $_SESSION['onetimepad'];
31 $mailbox = $_GET['mailbox'];
32 $passed_id = (int) $_GET['passed_id'];
33 $ent_id = $_GET['ent_id'];
34 $messages = $_SESSION['messages'];
35
36 if (isset($_GET['absolute_dl'])) {
37 $absolute_dl = $_GET['absolute_dl'];
38 }
39
40 /* end globals */
41 $mailbox = decodeHeader($mailbox);
42
43 global $uid_support;
44
45 $imapConnection = sqimap_login($username, $key, $imapServerAddress, $imapPort, 0);
46 $mbx_response = sqimap_mailbox_select($imapConnection, $mailbox);
47
48 $message = &$messages[$mbx_response['UIDVALIDITY']]["$passed_id"];
49 if (!is_object($message)) {
50 $message = sqimap_get_message($imapConnection,$passed_id, $mailbox);
51 }
52 $subject = $message->rfc822_header->subject;
53 $message = &$message->getEntity($ent_id);
54 $header = $message->header;
55 if ($message->rfc822_header) {
56 $subject = $message->rfc822_header->subject;
57 $charset = $header->content_type->properties['charset'];
58 } else {
59 $header = $message->header;
60 $charset = $header->getParameter('charset');
61 }
62 $type0 = $header->type0;
63 $type1 = $header->type1;
64 $encoding = strtolower($header->encoding);
65
66 /*
67 * lets redefine message as this particular entity that we wish to display.
68 * it should hold only the header for this entity. We need to fetch the body
69 * yet before we can display anything.
70 */
71
72 if (isset($override_type0)) {
73 $type0 = $override_type0;
74 }
75 if (isset($override_type1)) {
76 $type1 = $override_type1;
77 }
78 $filename = '';
79 if (is_object($message->header->disposition)) {
80 $filename = decodeHeader($header->disposition->getProperty('filename'));
81 if (!$filename) {
82 $filename = decodeHeader($header->disposition->getProperty('name'));
83 }
84 }
85 if (strlen($filename) < 1) {
86 if ($type1 == 'plain' && $type0 == 'text') {
87 $suffix = 'txt';
88 $filename = $subject . '.txt';
89 } else if ($type1 == 'richtext' && $type0 == 'text') {
90 $suffix = 'rtf';
91 $filename = $subject . '.rtf';
92 } else if ($type1 == 'postscript' && $type0 == 'application') {
93 $suffix = 'ps';
94 $filename = $subject . '.ps';
95 } else if ($type1 == 'rfc822' && $type0 == 'message') {
96 $suffix = 'eml';
97 $filename = $subject . '.msg';
98 } else {
99 $suffix = $type1;
100 }
101
102 if (strlen($filename) < 1) {
103 $filename = 'untitled'.strip_tags($ent_id).$suffix;
104 } else {
105 $filename = "$filename.$suffix";
106 }
107 }
108
109 /*
110 * Note:
111 * The following sections display the attachment in different
112 * ways depending on how they choose. The first way will download
113 * under any circumstance. This sets the Content-type to be
114 * applicatin/octet-stream, which should be interpreted by the
115 * browser as "download me".
116 * The second method (view) is used for images or other formats
117 * that should be able to be handled by the browser. It will
118 * most likely display the attachment inline inside the browser.
119 * And finally, the third one will be used by default. If it
120 * is displayable (text or html), it will load them up in a text
121 * viewer (built in to squirrelmail). Otherwise, it sets the
122 * content-type as application/octet-stream
123 */
124 if (isset($absolute_dl) && $absolute_dl) {
125 DumpHeaders($type0, $type1, $filename, 1);
126 } else {
127 DumpHeaders($type0, $type1, $filename, 0);
128 }
129 /* be aware that any warning caused by download.php will corrupt the
130 * attachment in case of ERROR reporting = E_ALL and the output is the screen */
131 mime_print_body_lines ($imapConnection, $passed_id, $ent_id, $encoding);
132
133 /*
134 * This function is verified to work with Netscape and the *very latest*
135 * version of IE. I don't know if it works with Opera, but it should now.
136 */
137 function DumpHeaders($type0, $type1, $filename, $force) {
138 global $_SERVER, $languages, $squirrelmail_language;
139 $isIE = $isIE6 = 0;
140
141 $HTTP_USER_AGENT = $_SERVER['HTTP_USER_AGENT'];
142
143 if (strstr($HTTP_USER_AGENT, 'compatible; MSIE ') !== false &&
144 strstr($HTTP_USER_AGENT, 'Opera') === false) {
145 $isIE = 1;
146 }
147
148 if (strstr($HTTP_USER_AGENT, 'compatible; MSIE 6') !== false &&
149 strstr($HTTP_USER_AGENT, 'Opera') === false) {
150 $isIE6 = 1;
151 }
152
153 if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
154 function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
155 $filename =
156 $languages[$squirrelmail_language]['XTRA_CODE']('downloadfilename', $filename, $HTTP_USER_AGENT);
157 } else {
158 $filename = ereg_replace('[^-a-zA-Z0-9\.]', '_', $filename);
159 }
160
161 // A Pox on Microsoft and it's Office!
162 if (!$force) {
163 // Try to show in browser window
164 header("Content-Disposition: inline; filename=\"$filename\"");
165 header("Content-Type: $type0/$type1; name=\"$filename\"");
166 } else {
167 // Try to pop up the "save as" box
168 // IE makes this hard. It pops up 2 save boxes, or none.
169 // http://support.microsoft.com/support/kb/articles/Q238/5/88.ASP
170 // But, accordint to Microsoft, it is "RFC compliant but doesn't
171 // take into account some deviations that allowed within the
172 // specification." Doesn't that mean RFC non-compliant?
173 // http://support.microsoft.com/support/kb/articles/Q258/4/52.ASP
174 //
175 // The best thing you can do for IE is to upgrade to the latest
176 // version
177 if ($isIE && !$isIE6) {
178 // http://support.microsoft.com/support/kb/articles/Q182/3/15.asp
179 // Do not have quotes around filename, but that applied to
180 // "attachment"... does it apply to inline too?
181 //
182 // This combination seems to work mostly. IE 5.5 SP 1 has
183 // known issues (see the Microsoft Knowledge Base)
184 header("Content-Disposition: inline; filename=$filename");
185 // This works for most types, but doesn't work with Word files
186 header("Content-Type: application/download; name=\"$filename\"");
187
188 // These are spares, just in case. :-)
189 //header("Content-Type: $type0/$type1; name=\"$filename\"");
190 //header("Content-Type: application/x-msdownload; name=\"$filename\"");
191 //header("Content-Type: application/octet-stream; name=\"$filename\"");
192 } else {
193 header("Content-Disposition: attachment; filename=\"$filename\"");
194 // application/octet-stream forces download for Netscape
195 header("Content-Type: application/octet-stream; name=\"$filename\"");
196 }
197 }
198 }
199 ?>