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<?php
/**
** A base module for [file] and [file*]
**/
/* Shortcode handler */
add_action( 'wpcf7_init', 'wpcf7_add_shortcode_file' );
function wpcf7_add_shortcode_file() {
wpcf7_add_shortcode( array( 'file', 'file*' ),
'wpcf7_file_shortcode_handler', true );
}
function wpcf7_file_shortcode_handler( $tag ) {
$tag = new WPCF7_Shortcode( $tag );
if ( empty( $tag->name ) )
return '';
$validation_error = wpcf7_get_validation_error( $tag->name );
$class = wpcf7_form_controls_class( $tag->type );
if ( $validation_error )
$class .= ' wpcf7-not-valid';
$atts = array();
$atts['size'] = $tag->get_size_option( '40' );
$atts['class'] = $tag->get_class_option( $class );
$atts['id'] = $tag->get_id_option();
$atts['tabindex'] = $tag->get_option( 'tabindex', 'int', true );
if ( $tag->is_required() )
$atts['aria-required'] = 'true';
$atts['aria-invalid'] = $validation_error ? 'true' : 'false';
$atts['type'] = 'file';
$atts['name'] = $tag->name;
$atts['value'] = '1';
$atts = wpcf7_format_atts( $atts );
$html = sprintf(
'<span class="wpcf7-form-control-wrap %1$s"><input %2$s />%3$s</span>',
sanitize_html_class( $tag->name ), $atts, $validation_error );
return $html;
}
/* Encode type filter */
add_filter( 'wpcf7_form_enctype', 'wpcf7_file_form_enctype_filter' );
function wpcf7_file_form_enctype_filter( $enctype ) {
$multipart = (bool) wpcf7_scan_shortcode( array( 'type' => array( 'file', 'file*' ) ) );
if ( $multipart ) {
$enctype = 'multipart/form-data';
}
return $enctype;
}
/* Validation + upload handling filter */
add_filter( 'wpcf7_validate_file', 'wpcf7_file_validation_filter', 10, 2 );
add_filter( 'wpcf7_validate_file*', 'wpcf7_file_validation_filter', 10, 2 );
function wpcf7_file_validation_filter( $result, $tag ) {
$tag = new WPCF7_Shortcode( $tag );
$name = $tag->name;
$id = $tag->get_id_option();
$file = isset( $_FILES[$name] ) ? $_FILES[$name] : null;
if ( $file['error'] && UPLOAD_ERR_NO_FILE != $file['error'] ) {
$result->invalidate( $tag, wpcf7_get_message( 'upload_failed_php_error' ) );
return $result;
}
if ( empty( $file['tmp_name'] ) && $tag->is_required() ) {
$result->invalidate( $tag, wpcf7_get_message( 'invalid_required' ) );
return $result;
}
if ( ! is_uploaded_file( $file['tmp_name'] ) )
return $result;
$allowed_file_types = array();
if ( $file_types_a = $tag->get_option( 'filetypes' ) ) {
foreach ( $file_types_a as $file_types ) {
$file_types = explode( '|', $file_types );
foreach ( $file_types as $file_type ) {
$file_type = trim( $file_type, '.' );
$file_type = str_replace( array( '.', '+', '*', '?' ),
array( '\.', '\+', '\*', '\?' ), $file_type );
$allowed_file_types[] = $file_type;
}
}
}
$allowed_file_types = array_unique( $allowed_file_types );
$file_type_pattern = implode( '|', $allowed_file_types );
$allowed_size = 1048576; // default size 1 MB
if ( $file_size_a = $tag->get_option( 'limit' ) ) {
$limit_pattern = '/^([1-9][0-9]*)([kKmM]?[bB])?$/';
foreach ( $file_size_a as $file_size ) {
if ( preg_match( $limit_pattern, $file_size, $matches ) ) {
$allowed_size = (int) $matches[1];
if ( ! empty( $matches[2] ) ) {
$kbmb = strtolower( $matches[2] );
if ( 'kb' == $kbmb )
$allowed_size *= 1024;
elseif ( 'mb' == $kbmb )
$allowed_size *= 1024 * 1024;
}
break;
}
}
}
/* File type validation */
// Default file-type restriction
if ( '' == $file_type_pattern )
$file_type_pattern = 'jpg|jpeg|png|gif|pdf|doc|docx|ppt|pptx|odt|avi|ogg|m4a|mov|mp3|mp4|mpg|wav|wmv';
$file_type_pattern = trim( $file_type_pattern, '|' );
$file_type_pattern = '(' . $file_type_pattern . ')';
$file_type_pattern = '/\.' . $file_type_pattern . '$/i';
if ( ! preg_match( $file_type_pattern, $file['name'] ) ) {
$result->invalidate( $tag, wpcf7_get_message( 'upload_file_type_invalid' ) );
return $result;
}
/* File size validation */
if ( $file['size'] > $allowed_size ) {
$result->invalidate( $tag, wpcf7_get_message( 'upload_file_too_large' ) );
return $result;
}
wpcf7_init_uploads(); // Confirm upload dir
$uploads_dir = wpcf7_upload_tmp_dir();
$uploads_dir = wpcf7_maybe_add_random_dir( $uploads_dir );
$filename = $file['name'];
$filename = wpcf7_canonicalize( $filename );
$filename = sanitize_file_name( $filename );
$filename = wpcf7_antiscript_file_name( $filename );
$filename = wp_unique_filename( $uploads_dir, $filename );
$new_file = trailingslashit( $uploads_dir ) . $filename;
if ( false === @move_uploaded_file( $file['tmp_name'], $new_file ) ) {
$result->invalidate( $tag, wpcf7_get_message( 'upload_failed' ) );
return $result;
}
// Make sure the uploaded file is only readable for the owner process
@chmod( $new_file, 0400 );
if ( $submission = WPCF7_Submission::get_instance() ) {
$submission->add_uploaded_file( $name, $new_file );
}
return $result;
}
/* Messages */
add_filter( 'wpcf7_messages', 'wpcf7_file_messages' );
function wpcf7_file_messages( $messages ) {
return array_merge( $messages, array(
'upload_failed' => array(
'description' => __( "Uploading a file fails for any reason", 'contact-form-7' ),
'default' => __( 'Failed to upload file.', 'contact-form-7' )
),
'upload_file_type_invalid' => array(
'description' => __( "Uploaded file is not allowed file type", 'contact-form-7' ),
'default' => __( 'This file type is not allowed.', 'contact-form-7' )
),
'upload_file_too_large' => array(
'description' => __( "Uploaded file is too large", 'contact-form-7' ),
'default' => __( 'This file is too large.', 'contact-form-7' )
),
'upload_failed_php_error' => array(
'description' => __( "Uploading a file fails for PHP error", 'contact-form-7' ),
'default' => __( 'Failed to upload file. Error occurred.', 'contact-form-7' )
)
) );
}
/* Tag generator */
add_action( 'admin_init', 'wpcf7_add_tag_generator_file', 50 );
function wpcf7_add_tag_generator_file() {
if ( ! function_exists( 'wpcf7_add_tag_generator' ) )
return;
wpcf7_add_tag_generator( 'file', __( 'File upload', 'contact-form-7' ),
'wpcf7-tg-pane-file', 'wpcf7_tg_pane_file' );
}
function wpcf7_tg_pane_file( $contact_form ) {
?>
<div id="wpcf7-tg-pane-file" class="hidden">
<form action="">
<table>
<tr><td><input type="checkbox" name="required" /> <?php echo esc_html( __( 'Required field?', 'contact-form-7' ) ); ?></td></tr>
<tr><td><?php echo esc_html( __( 'Name', 'contact-form-7' ) ); ?><br /><input type="text" name="name" class="tg-name oneline" /></td><td></td></tr>
</table>
<table>
<tr>
<td><code>id</code> (<?php echo esc_html( __( 'optional', 'contact-form-7' ) ); ?>)<br />
<input type="text" name="id" class="idvalue oneline option" /></td>
<td><code>class</code> (<?php echo esc_html( __( 'optional', 'contact-form-7' ) ); ?>)<br />
<input type="text" name="class" class="classvalue oneline option" /></td>
</tr>
<tr>
<td><?php echo esc_html( __( "File size limit", 'contact-form-7' ) ); ?> (<?php echo esc_html( __( 'bytes', 'contact-form-7' ) ); ?>) (<?php echo esc_html( __( 'optional', 'contact-form-7' ) ); ?>)<br />
<input type="text" name="limit" class="filesize oneline option" /></td>
<td><?php echo esc_html( __( "Acceptable file types", 'contact-form-7' ) ); ?> (<?php echo esc_html( __( 'optional', 'contact-form-7' ) ); ?>)<br />
<input type="text" name="filetypes" class="filetype oneline option" /></td>
</tr>
</table>
<div class="tg-tag"><?php echo esc_html( __( "Copy this code and paste it into the form left.", 'contact-form-7' ) ); ?><br /><input type="text" name="file" class="tag wp-ui-text-highlight code" readonly="readonly" onfocus="this.select()" /></div>
<div class="tg-mail-tag"><?php echo esc_html( __( "And, put this code into the File Attachments field below.", 'contact-form-7' ) ); ?><br /><input type="text" class="mail-tag wp-ui-text-highlight code" readonly="readonly" onfocus="this.select()" /></div>
</form>
</div>
<?php
}
/* Warning message */
add_action( 'wpcf7_admin_notices', 'wpcf7_file_display_warning_message' );
function wpcf7_file_display_warning_message() {
if ( ! $contact_form = wpcf7_get_current_contact_form() ) {
return;
}
$has_tags = (bool) $contact_form->form_scan_shortcode(
array( 'type' => array( 'file', 'file*' ) ) );
if ( ! $has_tags )
return;
$uploads_dir = wpcf7_upload_tmp_dir();
wpcf7_init_uploads();
if ( ! is_dir( $uploads_dir ) || ! wp_is_writable( $uploads_dir ) ) {
$message = sprintf( __( 'This contact form contains file uploading fields, but the temporary folder for the files (%s) does not exist or is not writable. You can create the folder or change its permission manually.', 'contact-form-7' ), $uploads_dir );
echo '<div class="error"><p><strong>' . esc_html( $message ) . '</strong></p></div>';
}
}
/* File uploading functions */
function wpcf7_init_uploads() {
$dir = wpcf7_upload_tmp_dir();
wp_mkdir_p( $dir );
$htaccess_file = trailingslashit( $dir ) . '.htaccess';
if ( file_exists( $htaccess_file ) ) {
return;
}
if ( $handle = @fopen( $htaccess_file, 'w' ) ) {
fwrite( $handle, "Deny from all\n" );
fclose( $handle );
}
}
function wpcf7_maybe_add_random_dir( $dir ) {
do {
$rand_max = mt_getrandmax();
$rand = zeroise( mt_rand( 0, $rand_max ), strlen( $rand_max ) );
$dir_new = path_join( $dir, $rand );
} while ( file_exists( $dir_new ) );
if ( wp_mkdir_p( $dir_new ) ) {
return $dir_new;
}
return $dir;
}
function wpcf7_upload_tmp_dir() {
if ( defined( 'WPCF7_UPLOADS_TMP_DIR' ) )
return WPCF7_UPLOADS_TMP_DIR;
else
return wpcf7_upload_dir( 'dir' ) . '/wpcf7_uploads';
}
add_action( 'template_redirect', 'wpcf7_cleanup_upload_files', 20 );
function wpcf7_cleanup_upload_files() {
if ( is_admin() || 'GET' != $_SERVER['REQUEST_METHOD']
|| is_robots() || is_feed() || is_trackback() ) {
return;
}
$dir = trailingslashit( wpcf7_upload_tmp_dir() );
if ( ! is_dir( $dir ) || ! is_readable( $dir ) || ! wp_is_writable( $dir ) ) {
return;
}
if ( $handle = @opendir( $dir ) ) {
while ( false !== ( $file = readdir( $handle ) ) ) {
if ( $file == "." || $file == ".." || $file == ".htaccess" ) {
continue;
}
$mtime = @filemtime( $dir . $file );
if ( $mtime && time() < $mtime + 60 ) { // less than 60 secs old
continue;
}
wpcf7_rmdir_p( path_join( $dir, $file ) );
}
closedir( $handle );
}
}
?>
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