forked from mantisbt/mantisbt
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file_download.php
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file_download.php
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<?php
# MantisBT - A PHP based bugtracking system
# MantisBT is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# MantisBT is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with MantisBT. If not, see <http://www.gnu.org/licenses/>.
/**
* Add file and redirect to the referring page
*
* @package MantisBT
* @copyright Copyright 2000 - 2002 Kenzaburo Ito - kenito@300baud.org
* @copyright Copyright 2002 MantisBT Team - mantisbt-dev@lists.sourceforge.net
* @link http://www.mantisbt.org
*
* @uses core.php
* @uses access_api.php
* @uses authentication_api.php
* @uses bug_api.php
* @uses config_api.php
* @uses constant_inc.php
* @uses database_api.php
* @uses file_api.php
* @uses gpc_api.php
* @uses http_api.php
* @uses utility_api.php
*/
$g_bypass_headers = true; # suppress headers as we will send our own later
define( 'COMPRESSION_DISABLED', true );
require_once( 'core.php' );
require_api( 'access_api.php' );
require_api( 'authentication_api.php' );
require_api( 'bug_api.php' );
require_api( 'config_api.php' );
require_api( 'constant_inc.php' );
require_api( 'database_api.php' );
require_api( 'file_api.php' );
require_api( 'gpc_api.php' );
require_api( 'http_api.php' );
require_api( 'utility_api.php' );
auth_ensure_user_authenticated();
$f_show_inline = gpc_get_bool( 'show_inline', false );
# To prevent cross-domain inline hotlinking to attachments we require a CSRF
# token from the user to show any attachment inline within the browser.
# Without this security in place a malicious user could upload a HTML file
# attachment and direct a user to file_download.php?file_id=X&type=bug&show_inline=1
# and the malicious HTML content would be rendered in the user's browser,
# violating cross-domain security.
if ( $f_show_inline ) {
# Disable errors for form_security_validate as we need to send HTTP
# headers prior to raising an error (the error handler
# doesn't check that headers have been sent, it just
# makes the assumption that they've been sent already).
if ( !@form_security_validate( 'file_show_inline' ) ) {
http_all_headers();
trigger_error( ERROR_FORM_TOKEN_INVALID, ERROR );
}
}
$f_file_id = gpc_get_int( 'file_id' );
$f_type = gpc_get_string( 'type' );
$c_file_id = (integer)$f_file_id;
# we handle the case where the file is attached to a bug
# or attached to a project as a project doc.
$query = '';
switch ( $f_type ) {
case 'bug':
$t_bug_file_table = db_get_table( 'bug_file' );
$query = "SELECT *
FROM $t_bug_file_table
WHERE id=" . db_param();
break;
case 'doc':
$t_project_file_table = db_get_table( 'project_file' );
$query = "SELECT *
FROM $t_project_file_table
WHERE id=" . db_param();
break;
default:
access_denied();
}
$result = db_query_bound( $query, array( $c_file_id ) );
$row = db_fetch_array( $result );
extract( $row, EXTR_PREFIX_ALL, 'v' );
if ( $f_type == 'bug' ) {
$t_project_id = bug_get_field( $v_bug_id, 'project_id' );
} else {
$t_project_id = $v_project_id;
}
# Check access rights
switch ( $f_type ) {
case 'bug':
if ( !file_can_download_bug_attachments( $v_bug_id, (int)$v_user_id ) ) {
access_denied();
}
break;
case 'doc':
# Check if project documentation feature is enabled.
if ( OFF == config_get( 'enable_project_documentation' ) ) {
access_denied();
}
access_ensure_project_level( config_get( 'view_proj_doc_threshold' ), $v_project_id );
break;
}
# throw away output buffer contents (and disable it) to protect download
while ( @ob_end_clean() );
if ( ini_get( 'zlib.output_compression' ) && function_exists( 'ini_set' ) ) {
ini_set( 'zlib.output_compression', false );
}
http_security_headers();
# Make sure that IE can download the attachments under https.
header( 'Pragma: public' );
# To fix an IE bug which causes problems when downloading
# attached files via HTTPS, we disable the "Pragma: no-cache"
# command when IE is used over HTTPS.
global $g_allow_file_cache;
if ( http_is_protocol_https() && is_browser_internet_explorer() ) {
# Suppress "Pragma: no-cache" header.
} else {
if ( !isset( $g_allow_file_cache ) ) {
header( 'Pragma: no-cache' );
}
}
header( 'Expires: ' . gmdate( 'D, d M Y H:i:s \G\M\T', time() ) );
header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s \G\M\T', $v_date_added ) );
$t_filename = file_get_display_name( $v_filename );
# For Internet Explorer 8 as per http://blogs.msdn.com/ie/archive/2008/07/02/ie8-security-part-v-comprehensive-protection.aspx
# Don't let IE second guess our content-type!
header( 'X-Content-Type-Options: nosniff' );
http_content_disposition_header( $t_filename, $f_show_inline );
header( 'Content-Length: ' . $v_filesize );
# If finfo is available (always true for PHP >= 5.3.0) we can use it to determine the MIME type of files
$finfo = finfo_get_if_available();;
$t_content_type = $v_file_type;
$t_content_type_override = file_get_content_type_override ( $t_filename );
# dump file content to the connection.
switch ( config_get( 'file_upload_method' ) ) {
case DISK:
$t_local_disk_file = file_normalize_attachment_path( $v_diskfile, $t_project_id );
if ( file_exists( $t_local_disk_file ) ) {
if ( $finfo ) {
$t_file_info_type = $finfo->file( $t_local_disk_file );
if ( $t_file_info_type !== false ) {
$t_content_type = $t_file_info_type;
}
}
if ( $t_content_type_override )
$t_content_type = $t_content_type_override;
header( 'Content-Type: ' . $t_content_type );
if ( config_get( 'file_download_xsendfile_enabled' ) ) {
$t_xsendfile_header_name = config_get( 'file_download_xsendfile_header_name' );
header( $t_xsendfile_header_name . ': ' . $t_local_disk_file );
} else {
readfile( $t_local_disk_file );
}
}
break;
case FTP:
$t_local_disk_file = file_normalize_attachment_path( $v_diskfile, $t_project_id );
if ( !file_exists( $t_local_disk_file ) ) {
$ftp = file_ftp_connect();
file_ftp_get ( $ftp, $t_local_disk_file, $v_diskfile );
file_ftp_disconnect( $ftp );
}
if ( $finfo ) {
$t_file_info_type = $finfo->file( $t_local_disk_file );
if ( $t_file_info_type !== false ) {
$t_content_type = $t_file_info_type;
}
}
if ( $t_content_type_override )
$t_content_type = $t_content_type_override;
header( 'Content-Type: ' . $t_content_type );
readfile( $t_local_disk_file );
break;
default:
if ( $finfo ) {
$t_file_info_type = $finfo->buffer( $v_content );
if ( $t_file_info_type !== false ) {
$t_content_type = $t_file_info_type;
}
}
if ( $t_content_type_override )
$t_content_type = $t_content_type_override;
header( 'Content-Type: ' . $t_content_type );
echo $v_content;
}