File: /home/capeglid/public_html/wp-content/plugins/gravityforms/includes/upload.php
<?php
if ( ! class_exists( 'GFForms' ) ) {
die();
}
class GFAsyncUpload {
public static function upload() {
GFCommon::log_debug( 'GFAsyncUpload::upload(): Starting.' );
if ( $_SERVER['REQUEST_METHOD'] !== 'POST' ) { // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotValidated
self::die_error();
}
// If the file is bigger than the server can accept then the form_id might not arrive.
// This might happen if the file is bigger than the max post size ini setting.
// Validation in the browser reduces the risk of this happening.
if ( ! isset( $_REQUEST['form_id'] ) ) {
GFCommon::log_debug( 'GFAsyncUpload::upload(): File upload aborted because the form_id was not found. The file may have been bigger than the max post size ini setting.' );
self::die_error( 500, __( 'Failed to upload file.', 'gravityforms' ) );
}
$form_id = absint( $_REQUEST['form_id'] );
$form_unique_id = rgpost( 'gform_unique_id' );
$form = GFAPI::get_form( $form_id );
if ( empty( $form ) || ! $form['is_active'] ) {
self::die_error();
}
if ( GFCommon::form_requires_login( $form ) ) {
if ( ! is_user_logged_in() ) {
self::die_error( 401, __( 'You must be logged in to upload files to this form.', 'gravityforms' ) );
}
check_admin_referer( 'gform_file_upload_' . $form_id, '_gform_file_upload_nonce_' . $form_id );
}
if ( ! ctype_alnum( $form_unique_id ) ) {
self::die_error();
}
$tmp_location = GFFormsModel::get_tmp_upload_location( $form['id'] );
$target_dir = $tmp_location['path'];
if ( ! is_dir( $target_dir ) ) {
if ( ! wp_mkdir_p( $target_dir ) ) {
GFCommon::log_debug( "GFAsyncUpload::upload(): Couldn't create the tmp folder: " . $target_dir );
self::die_error( 500, __( 'Failed to upload file.', 'gravityforms' ) );
}
}
$time = current_time( 'mysql' );
$y = substr( $time, 0, 4 );
$m = substr( $time, 5, 2 );
//adding index.html files to all subfolders
if ( ! file_exists( GFFormsModel::get_upload_root() . '/index.html' ) ) {
GFForms::add_security_files();
} else if ( ! file_exists( GFFormsModel::get_upload_path( $form_id ) . '/index.html' ) ) { // nosemgrep audit.php.lang.security.file.phar-deserialization
GFCommon::recursive_add_index_file( GFFormsModel::get_upload_path( $form_id ) );
} else if ( ! file_exists( GFFormsModel::get_upload_path( $form_id ) . "/$y/index.html" ) ) { // nosemgrep audit.php.lang.security.file.phar-deserialization
GFCommon::recursive_add_index_file( GFFormsModel::get_upload_path( $form_id ) . "/$y" );
} else {
GFCommon::recursive_add_index_file( GFFormsModel::get_upload_path( $form_id ) . "/$y/$m" );
}
if ( ! file_exists( $target_dir . '/index.html' ) ) { // nosemgrep audit.php.lang.security.file.phar-deserialization
GFCommon::recursive_add_index_file( $target_dir );
}
$uploaded_filename = $_REQUEST['original_filename']; // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized, WordPress.Security.ValidatedSanitizedInput.MissingUnslash, WordPress.Security.ValidatedSanitizedInput.InputNotValidated
$file_name = isset( $_REQUEST['name'] ) ? $_REQUEST['name'] : ''; // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized, WordPress.Security.ValidatedSanitizedInput.MissingUnslash
$field_id = rgpost( 'field_id' );
$field_id = absint( $field_id );
/**
* Filter the field object that will be associated with the uploaded file.
*
* This is useful when you want to use Gravity Forms' upload system to upload files. Using this filter you can return a one-time-use field object
* to process the file as desired.
*
* @since 2.2.2
*
* @param GF_Field $field The current field object.
* @param array $form The current form object.
* @param int $field_id The field ID as passed via the $_POST. Used to fetch the current $field.
*/
$field = gf_apply_filters( array( 'gform_multifile_upload_field', $form['id'], $field_id ), GFFormsModel::get_field( $form, $field_id ), $form, $field_id );
if ( empty( $field ) || GFFormsModel::get_input_type( $field ) !== 'fileupload' ) {
self::die_error();
}
if ( GFCommon::file_name_has_disallowed_extension( $file_name ) || GFCommon::file_name_has_disallowed_extension( $uploaded_filename ) ) {
GFCommon::log_debug( "GFAsyncUpload::upload(): Illegal file extension: {$file_name}" );
self::die_error( 104, __( 'The uploaded file type is not allowed.', 'gravityforms' ) );
}
$max_upload_size_in_bytes = $field->get_max_file_size_bytes();
$max_upload_size_in_mb = $max_upload_size_in_bytes / 1048576;
if ( $_FILES['file']['size'] > 0 && $_FILES['file']['size'] > $max_upload_size_in_bytes ) { // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotValidated
self::die_error( 104,sprintf( __( 'File exceeds size limit. Maximum file size: %dMB', 'gravityforms' ), $max_upload_size_in_mb ) );
}
$file_name = sanitize_file_name( $file_name );
$uploaded_filename = sanitize_file_name( $uploaded_filename );
$allowed_extensions = $field->get_clean_allowed_extensions();
if ( ! empty( $allowed_extensions ) ) {
if ( ! GFCommon::match_file_extension( $file_name, $allowed_extensions ) || ! GFCommon::match_file_extension( $uploaded_filename, $allowed_extensions ) ) {
GFCommon::log_debug( "GFAsyncUpload::upload(): The uploaded file type is not allowed: {$file_name}" );
self::die_error( 104, sprintf( __( 'The uploaded file type is not allowed. Must be one of the following: %s', 'gravityforms' ), strtolower( $field['allowedExtensions'] ) ) );
}
}
$chunk = isset( $_REQUEST['chunk'] ) ? intval( $_REQUEST['chunk'] ) : 0;
$chunks = isset( $_REQUEST['chunks'] ) ? intval( $_REQUEST['chunks'] ) : 0;
$chunk_data = $chunks && $file_name ? rgar( $_REQUEST, str_replace( '.', '_', $file_name ) ) : array();
$tmp_file_name = '';
if ( $chunk ) {
if ( empty( $chunk_data['hash'] ) || ( $chunk_data['hash'] !== wp_hash( $chunk_data['temp_filename'] . ( $chunk - 1 ) . $form_id . $field_id ) ) ) {
self::die_error( 105, __( 'Upload unsuccessful', 'gravityforms' ) . ' ' . $uploaded_filename );
}
$tmp_file_name = $chunk_data['temp_filename'];
}
if ( empty( $tmp_file_name ) ) {
$tmp_file_name = $form_unique_id . '_input_' . $field_id . '_' . GFCommon::random_str( 16 ) . '_' . $file_name;
}
$tmp_file_name = sanitize_file_name( $tmp_file_name );
$file_path = $target_dir . $tmp_file_name;
// Only validate if chunking is disabled, or if the final chunk has been uploaded.
$check_chunk = $chunks === 0 || $chunk === ( $chunks - 1 );
if ( ! $field->is_check_type_and_ext_disabled() && $check_chunk ) {
$file_array = $_FILES['file']; // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized, WordPress.Security.ValidatedSanitizedInput.InputNotValidated
if ( $chunks ) {
$file_array['tmp_name'] = $file_path;
}
// Whitelist the file type
$valid_uploaded_filename = GFCommon::check_type_and_ext( $file_array, $uploaded_filename );
if ( is_wp_error( $valid_uploaded_filename ) ) {
GFCommon::log_debug( sprintf( '%s(): %s; %s; %s', __METHOD__, $uploaded_filename, $valid_uploaded_filename->get_error_code(), $valid_uploaded_filename->get_error_message() ) );
self::die_error( $valid_uploaded_filename->get_error_code(), $valid_uploaded_filename->get_error_message() );
}
$valid_file_name = GFCommon::check_type_and_ext( $file_array, $file_name );
if ( is_wp_error( $valid_file_name ) ) {
GFCommon::log_debug( sprintf( '%s(): %s; %s; %s', __METHOD__, $file_name, $valid_file_name->get_error_code(), $valid_file_name->get_error_message() ) );
self::die_error( $valid_file_name->get_error_code(), $valid_file_name->get_error_message() );
}
}
$cleanup_target_dir = apply_filters( 'gform_cleanup_target_dir', true ); // Remove old files
$max_file_age = 5 * 3600; // Temp file age in seconds
// Remove old temp files
if ( $cleanup_target_dir ) {
if ( is_dir( $target_dir ) && ( $dir = opendir( $target_dir ) ) ) {
while ( ( $file = readdir( $dir ) ) !== false ) {
$tmp_file_path = $target_dir . $file;
// Remove temp file if it is older than the max age and is not the current file
if ( preg_match( '/\.part$/', $file ) && ( filemtime( $tmp_file_path ) < time() - $max_file_age ) && ( $tmp_file_path != "{$file_path}.part" ) ) { // nosemgrep audit.php.lang.security.file.phar-deserialization
GFCommon::log_debug( 'GFAsyncUpload::upload(): Deleting file: ' . $tmp_file_path );
@unlink( $tmp_file_path ); // nosemgrep audit.php.lang.security.file.phar-deserialization, audit.php.lang.security.file.read-write-delete
}
}
closedir( $dir );
} else {
GFCommon::log_debug( 'GFAsyncUpload::upload(): Failed to open temp directory: ' . $target_dir );
self::die_error( 100, __( 'Failed to open temp directory.', 'gravityforms' ) );
}
}
if ( isset( $_SERVER['HTTP_CONTENT_TYPE'] ) ) {
$contentType = $_SERVER['HTTP_CONTENT_TYPE']; // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized, WordPress.Security.ValidatedSanitizedInput.MissingUnslash
}
if ( isset( $_SERVER['CONTENT_TYPE'] ) ) {
$contentType = $_SERVER['CONTENT_TYPE']; // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized, WordPress.Security.ValidatedSanitizedInput.MissingUnslash
}
// Handle non multipart uploads older WebKit versions didn't support multipart in HTML5
if ( strpos( $contentType, 'multipart' ) !== false ) {
if ( isset( $_FILES['file']['tmp_name'] ) && is_uploaded_file( $_FILES['file']['tmp_name'] ) ) { // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
// Open temp file
$out = @fopen( "{$file_path}.part", $chunk == 0 ? 'wb' : 'ab' );
if ( $out ) {
// Read binary input stream and append it to temp file
$in = @fopen( $_FILES['file']['tmp_name'], 'rb' ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
if ( $in ) {
while ( $buff = fread( $in, 4096 ) ) {
fwrite( $out, $buff ); // nosemgrep audit.php.lang.security.file.read-write-delete
}
} else {
self::die_error( 101, __( 'Failed to open input stream.', 'gravityforms' ) );
}
@fclose( $in );
@fclose( $out );
@unlink( $_FILES['file']['tmp_name'] ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
} else {
self::die_error( 102, __( 'Failed to open output stream.', 'gravityforms' ) );
}
} else {
self::die_error( 103, __( 'Failed to move uploaded file.', 'gravityforms' ) );
}
} else {
// Open temp file
$out = @fopen( "{$file_path}.part", $chunk == 0 ? 'wb' : 'ab' );
if ( $out ) {
// Read binary input stream and append it to temp file
$in = @fopen( 'php://input', 'rb' );
if ( $in ) {
while ( $buff = fread( $in, 4096 ) ) {
fwrite( $out, $buff ); // nosemgrep audit.php.lang.security.file.read-write-delete
}
} else {
self::die_error( 101, __( 'Failed to open input stream.', 'gravityforms' ) );
}
@fclose( $in );
@fclose( $out );
} else {
self::die_error( 102, __( 'Failed to open output stream.', 'gravityforms' ) );
}
}
if ( ! $chunks || $chunk == $chunks - 1 ) {
// Upload is complete. Strip the temp .part suffix off
rename( "{$file_path}.part", $file_path );
if ( file_exists( $file_path ) ) { // nosemgrep audit.php.lang.security.file.phar-deserialization
GFFormsModel::set_permissions( $file_path );
} else {
self::die_error( 105, __( 'Upload unsuccessful', 'gravityforms' ) . ' ' . $uploaded_filename );
}
gf_do_action( array( 'gform_post_multifile_upload', $form['id'] ), $form, $field, $uploaded_filename, $tmp_file_name, $file_path );
GFCommon::log_debug( sprintf( 'GFAsyncUpload::upload(): File upload complete. temp_filename: %s uploaded_filename: %s ', $tmp_file_name, $uploaded_filename ) );
} else {
if ( file_exists( "{$file_path}.part" ) ) {
GFFormsModel::set_permissions( "{$file_path}.part" );
} else {
self::die_error( 105, __( 'Upload unsuccessful', 'gravityforms' ) . ' ' . $uploaded_filename );
}
GFCommon::log_debug( sprintf( 'GFAsyncUpload::upload(): Chunk upload complete. temp_filename: %s uploaded_filename: %s chunk: %d', $tmp_file_name, $uploaded_filename, $chunk ) );
}
$output = array(
'status' => 'ok',
'data' => array(
'temp_filename' => $tmp_file_name,
'uploaded_filename' => str_replace( "\\'", "'", urldecode( $uploaded_filename ) ) //Decoding filename to prevent file name mismatch.
)
);
if ( $chunks && ( $chunk != $chunks - 1 ) ) {
$output['data']['hash'] = wp_hash( $tmp_file_name . $chunk . $form_id . $field_id );
}
$output = json_encode( $output );
self::send_headers( 200 );
die( $output ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
}
/**
* Ends the request with an error response.
*
* @since unknown
* @since 2.9.20 Made the params optional.
*
* @param int|string $status_code The status code. Optional. Defaults to 400.
* @param string $message The error message. Optional. Defaults to 'Invalid request.'.
*
* @return void
*/
public static function die_error( $status_code = 400, $message = '' ) {
self::send_headers( is_int( $status_code ) ? $status_code : 400 );
wp_send_json(
array(
'status' => 'error',
'error' => array(
'code' => $status_code,
'message' => $message ?: __( 'Invalid request.', 'gravityforms' ),
),
)
);
}
/**
* Sends the headers for the response.
*
* @since 2.9.20
*
* @param int $status_code The status code.
*
* @return void
*/
private static function send_headers( $status_code ) {
header( 'Content-Type: application/json; charset=' . get_option( 'blog_charset' ) );
send_nosniff_header();
nocache_headers();
status_header( $status_code );
}
}
GFAsyncUpload::upload();