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<?php
/**
** A base module for [file] and [file*]
**/
/* form_tag handler */
add_action( 'wpcf7_init', 'wpcf7_add_form_tag_file', 10, 0 );
function wpcf7_add_form_tag_file() {
wpcf7_add_form_tag( array( 'file', 'file*' ),
'wpcf7_file_form_tag_handler', array( 'name-attr' => true ) );
}
function wpcf7_file_form_tag_handler( $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', 'signed_int', true );
$atts['accept'] = wpcf7_acceptable_filetypes(
$tag->get_option( 'filetypes' ), 'attr' );
if ( $tag->is_required() ) {
$atts['aria-required'] = 'true';
}
$atts['aria-invalid'] = $validation_error ? 'true' : 'false';
$atts['type'] = 'file';
$atts['name'] = $tag->name;
$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', 10, 1 );
function wpcf7_file_form_enctype_filter( $enctype ) {
$multipart = (bool) wpcf7_scan_form_tags(
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 ) {
$name = $tag->name;
$id = $tag->get_id_option();
$file = isset( $_FILES[$name] ) ? $_FILES[$name] : null;
if ( $file['error'] and UPLOAD_ERR_NO_FILE != $file['error'] ) {
$result->invalidate( $tag, wpcf7_get_message( 'upload_failed_php_error' ) );
return $result;
}
if ( empty( $file['tmp_name'] ) and $tag->is_required() ) {
$result->invalidate( $tag, wpcf7_get_message( 'invalid_required' ) );
return $result;
}
if ( ! is_uploaded_file( $file['tmp_name'] ) ) {
return $result;
}
/* File type validation */
$file_type_pattern = wpcf7_acceptable_filetypes(
$tag->get_option( 'filetypes' ), 'regex' );
$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 */
$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;
}
}
}
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, 'as-is' );
$filename = wpcf7_antiscript_file_name( $filename );
$filename = apply_filters( 'wpcf7_upload_file_name', $filename,
$file['name'], $tag );
$filename = wp_unique_filename( $uploads_dir, $filename );
$new_file = path_join( $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', 10, 1 );
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' => __( "There was an unknown error uploading the file.", 'contact-form-7' )
),
'upload_file_type_invalid' => array(
'description' => __( "Uploaded file is not allowed for file type", 'contact-form-7' ),
'default' => __( "You are not allowed to upload files of this type.", 'contact-form-7' )
),
'upload_file_too_large' => array(
'description' => __( "Uploaded file is too large", 'contact-form-7' ),
'default' => __( "The file is too big.", 'contact-form-7' )
),
'upload_failed_php_error' => array(
'description' => __( "Uploading a file fails for PHP error", 'contact-form-7' ),
'default' => __( "There was an error uploading the file.", 'contact-form-7' )
)
) );
}
/* Tag generator */
add_action( 'wpcf7_admin_init', 'wpcf7_add_tag_generator_file', 50, 0 );
function wpcf7_add_tag_generator_file() {
$tag_generator = WPCF7_TagGenerator::get_instance();
$tag_generator->add( 'file', __( 'file', 'contact-form-7' ),
'wpcf7_tag_generator_file' );
}
function wpcf7_tag_generator_file( $contact_form, $args = '' ) {
$args = wp_parse_args( $args, array() );
$type = 'file';
$description = __( "Generate a form-tag for a file uploading field. For more details, see %s.", 'contact-form-7' );
$desc_link = wpcf7_link( __( 'https://contactform7.com/file-uploading-and-attachment/', 'contact-form-7' ), __( 'File Uploading and Attachment', 'contact-form-7' ) );
?>
<div class="control-box">
<fieldset>
<legend><?php echo sprintf( esc_html( $description ), $desc_link ); ?></legend>
<table class="form-table">
<tbody>
<tr>
<th scope="row"><?php echo esc_html( __( 'Field type', 'contact-form-7' ) ); ?></th>
<td>
<fieldset>
<legend class="screen-reader-text"><?php echo esc_html( __( 'Field type', 'contact-form-7' ) ); ?></legend>
<label><input type="checkbox" name="required" /> <?php echo esc_html( __( 'Required field', 'contact-form-7' ) ); ?></label>
</fieldset>
</td>
</tr>
<tr>
<th scope="row"><label for="<?php echo esc_attr( $args['content'] . '-name' ); ?>"><?php echo esc_html( __( 'Name', 'contact-form-7' ) ); ?></label></th>
<td><input type="text" name="name" class="tg-name oneline" id="<?php echo esc_attr( $args['content'] . '-name' ); ?>" /></td>
</tr>
<tr>
<th scope="row"><label for="<?php echo esc_attr( $args['content'] . '-limit' ); ?>"><?php echo esc_html( __( "File size limit (bytes)", 'contact-form-7' ) ); ?></label></th>
<td><input type="text" name="limit" class="filesize oneline option" id="<?php echo esc_attr( $args['content'] . '-limit' ); ?>" /></td>
</tr>
<tr>
<th scope="row"><label for="<?php echo esc_attr( $args['content'] . '-filetypes' ); ?>"><?php echo esc_html( __( 'Acceptable file types', 'contact-form-7' ) ); ?></label></th>
<td><input type="text" name="filetypes" class="filetype oneline option" id="<?php echo esc_attr( $args['content'] . '-filetypes' ); ?>" /></td>
</tr>
<tr>
<th scope="row"><label for="<?php echo esc_attr( $args['content'] . '-id' ); ?>"><?php echo esc_html( __( 'Id attribute', 'contact-form-7' ) ); ?></label></th>
<td><input type="text" name="id" class="idvalue oneline option" id="<?php echo esc_attr( $args['content'] . '-id' ); ?>" /></td>
</tr>
<tr>
<th scope="row"><label for="<?php echo esc_attr( $args['content'] . '-class' ); ?>"><?php echo esc_html( __( 'Class attribute', 'contact-form-7' ) ); ?></label></th>
<td><input type="text" name="class" class="classvalue oneline option" id="<?php echo esc_attr( $args['content'] . '-class' ); ?>" /></td>
</tr>
</tbody>
</table>
</fieldset>
</div>
<div class="insert-box">
<input type="text" name="<?php echo $type; ?>" class="tag code" readonly="readonly" onfocus="this.select()" />
<div class="submitbox">
<input type="button" class="button button-primary insert-tag" value="<?php echo esc_attr( __( 'Insert Tag', 'contact-form-7' ) ); ?>" />
</div>
<br class="clear" />
<p class="description mail-tag"><label for="<?php echo esc_attr( $args['content'] . '-mailtag' ); ?>"><?php echo sprintf( esc_html( __( "To attach the file uploaded through this field to mail, you need to insert the corresponding mail-tag (%s) into the File Attachments field on the Mail tab.", 'contact-form-7' ) ), '<strong><span class="mail-tag"></span></strong>' ); ?><input type="text" class="mail-tag code hidden" readonly="readonly" id="<?php echo esc_attr( $args['content'] . '-mailtag' ); ?>" /></label></p>
</div>
<?php
}
/* Warning message */
add_action( 'wpcf7_admin_warnings',
'wpcf7_file_display_warning_message', 10, 3 );
function wpcf7_file_display_warning_message( $page, $action, $object ) {
if ( $object instanceof WPCF7_ContactForm ) {
$contact_form = $object;
} else {
return;
}
$has_tags = (bool) $contact_form->scan_form_tags(
array( 'type' => array( 'file', 'file*' ) ) );
if ( ! $has_tags ) {
return;
}
$uploads_dir = wpcf7_upload_tmp_dir();
wpcf7_init_uploads();
if ( ! is_dir( $uploads_dir )
or ! 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 sprintf( '<div class="notice notice-warning"><p>%s</p></div>',
esc_html( $message ) );
}
}
/* File uploading functions */
function wpcf7_acceptable_filetypes( $types = 'default', $format = 'regex' ) {
if ( 'default' === $types
or empty( $types ) ) {
$types = array(
'jpg',
'jpeg',
'png',
'gif',
'pdf',
'doc',
'docx',
'ppt',
'pptx',
'odt',
'avi',
'ogg',
'm4a',
'mov',
'mp3',
'mp4',
'mpg',
'wav',
'wmv',
);
} else {
$types_tmp = (array) $types;
$types = array();
foreach ( $types_tmp as $val ) {
if ( is_string( $val ) ) {
$val = preg_split( '/[\s|,]+/', $val );
}
$types = array_merge( $types, (array) $val );
}
}
$types = array_unique( array_filter( $types ) );
$output = '';
foreach ( $types as $type ) {
$type = trim( $type, ' ,.|' );
$type = str_replace(
array( '.', '+', '*', '?' ),
array( '\.', '\+', '\*', '\?' ),
$type );
if ( '' === $type ) {
continue;
}
if ( 'attr' === $format
or 'attribute' === $format ) {
$output .= sprintf( '.%s', $type );
$output .= ',';
} else {
$output .= $type;
$output .= '|';
}
}
return trim( $output, ' ,|' );
}
function wpcf7_init_uploads() {
$dir = wpcf7_upload_tmp_dir();
wp_mkdir_p( $dir );
$htaccess_file = path_join( $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 path_join( wpcf7_upload_dir( 'dir' ), 'wpcf7_uploads' );
}
}
add_action( 'template_redirect', 'wpcf7_cleanup_upload_files', 20, 0 );
function wpcf7_cleanup_upload_files( $seconds = 60, $max = 100 ) {
if ( is_admin()
or 'GET' != $_SERVER['REQUEST_METHOD']
or is_robots()
or is_feed()
or is_trackback() ) {
return;
}
$dir = trailingslashit( wpcf7_upload_tmp_dir() );
if ( ! is_dir( $dir )
or ! is_readable( $dir )
or ! wp_is_writable( $dir ) ) {
return;
}
$seconds = absint( $seconds );
$max = absint( $max );
$count = 0;
if ( $handle = opendir( $dir ) ) {
while ( false !== ( $file = readdir( $handle ) ) ) {
if ( '.' == $file
or '..' == $file
or '.htaccess' == $file ) {
continue;
}
$mtime = filemtime( path_join( $dir, $file ) );
if ( $mtime and time() < $mtime + $seconds ) { // less than $seconds old
continue;
}
wpcf7_rmdir_p( path_join( $dir, $file ) );
$count += 1;
if ( $max <= $count ) {
break;
}
}
closedir( $handle );
}
}