290 lines
11 KiB
PHP
290 lines
11 KiB
PHP
<?php
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if ( ! class_exists( 'GFForms' ) ) {
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die();
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}
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class GFAsyncUpload {
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public static function upload() {
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GFCommon::log_debug( 'GFAsyncUpload::upload(): Starting.' );
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if ( $_SERVER['REQUEST_METHOD'] != 'POST' ) {
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status_header( 404 );
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die();
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}
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header( 'Content-Type: text/html; charset=' . get_option( 'blog_charset' ) );
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send_nosniff_header();
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nocache_headers();
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status_header( 200 );
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// If the file is bigger than the server can accept then the form_id might not arrive.
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// This might happen if the file is bigger than the max post size ini setting.
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// Validation in the browser reduces the risk of this happening.
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if ( ! isset( $_REQUEST['form_id'] ) ) {
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GFCommon::log_debug( 'GFAsyncUpload::upload(): File upload aborted because the form_id was not found. The file may have been bigger than the max post size ini setting.' );
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self::die_error( 500, __( 'Failed to upload file.', 'gravityforms' ) );
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}
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$form_id = absint( $_REQUEST['form_id'] );
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$form_unique_id = rgpost( 'gform_unique_id' );
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$form = GFAPI::get_form( $form_id );
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if ( empty( $form ) || ! $form['is_active'] ) {
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die();
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}
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if ( rgar( $form, 'requireLogin' ) ) {
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if ( ! is_user_logged_in() ) {
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die();
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}
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check_admin_referer( 'gform_file_upload_' . $form_id, '_gform_file_upload_nonce_' . $form_id );
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}
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if ( ! ctype_alnum( $form_unique_id ) ) {
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die();
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}
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$target_dir = GFFormsModel::get_upload_path( $form_id ) . DIRECTORY_SEPARATOR . 'tmp' . DIRECTORY_SEPARATOR;
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if ( ! is_dir( $target_dir ) ) {
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if ( ! wp_mkdir_p( $target_dir ) ) {
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GFCommon::log_debug( "GFAsyncUpload::upload(): Couldn't create the tmp folder: " . $target_dir );
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self::die_error( 500, __( 'Failed to upload file.', 'gravityforms' ) );
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}
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}
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$time = current_time( 'mysql' );
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$y = substr( $time, 0, 4 );
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$m = substr( $time, 5, 2 );
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//adding index.html files to all subfolders
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if ( ! file_exists( GFFormsModel::get_upload_root() . '/index.html' ) ) {
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GFForms::add_security_files();
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} else if ( ! file_exists( GFFormsModel::get_upload_path( $form_id ) . '/index.html' ) ) {
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GFCommon::recursive_add_index_file( GFFormsModel::get_upload_path( $form_id ) );
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} else if ( ! file_exists( GFFormsModel::get_upload_path( $form_id ) . "/$y/index.html" ) ) {
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GFCommon::recursive_add_index_file( GFFormsModel::get_upload_path( $form_id ) . "/$y" );
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} else {
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GFCommon::recursive_add_index_file( GFFormsModel::get_upload_path( $form_id ) . "/$y/$m" );
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}
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if ( ! file_exists( $target_dir . '/index.html' ) ) {
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GFCommon::recursive_add_index_file( $target_dir );
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}
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$uploaded_filename = $_REQUEST['original_filename'];
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$file_name = isset( $_REQUEST['name'] ) ? $_REQUEST['name'] : '';
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$field_id = rgpost( 'field_id' );
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$field_id = absint( $field_id );
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/**
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* Filter the field object that will be associated with the uploaded file.
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*
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* 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
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* to process the file as desired.
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*
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* @since 2.2.2
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*
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* @param GF_Field $field The current field object.
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* @param array $form The current form object.
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* @param int $field_id The field ID as passed via the $_POST. Used to fetch the current $field.
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*/
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$field = gf_apply_filters( array( 'gform_multifile_upload_field', $form['id'], $field_id ), GFFormsModel::get_field( $form, $field_id ), $form, $field_id );
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if ( empty( $field ) || GFFormsModel::get_input_type( $field ) != 'fileupload' ) {
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die();
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}
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$file_name = sanitize_file_name( $file_name );
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$uploaded_filename = sanitize_file_name( $uploaded_filename );
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$allowed_extensions = ! empty( $field->allowedExtensions ) ? GFCommon::clean_extensions( explode( ',', strtolower( $field->allowedExtensions ) ) ) : array();
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$max_upload_size_in_bytes = $field->maxFileSize > 0 ? $field->maxFileSize * 1048576 : wp_max_upload_size();
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$max_upload_size_in_mb = $max_upload_size_in_bytes / 1048576;
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if ( $_FILES['file']['size'] > 0 && $_FILES['file']['size'] > $max_upload_size_in_bytes ) {
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self::die_error( 104,sprintf( __( 'File exceeds size limit. Maximum file size: %dMB', 'gravityforms' ), $max_upload_size_in_mb ) );
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}
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if ( GFCommon::file_name_has_disallowed_extension( $file_name ) || GFCommon::file_name_has_disallowed_extension( $uploaded_filename ) ) {
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GFCommon::log_debug( "GFAsyncUpload::upload(): Illegal file extension: {$file_name}" );
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self::die_error( 104, __( 'The uploaded file type is not allowed.', 'gravityforms' ) );
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}
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if ( ! empty( $allowed_extensions ) ) {
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if ( ! GFCommon::match_file_extension( $file_name, $allowed_extensions ) || ! GFCommon::match_file_extension( $uploaded_filename, $allowed_extensions ) ) {
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GFCommon::log_debug( "GFAsyncUpload::upload(): The uploaded file type is not allowed: {$file_name}" );
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self::die_error( 104, sprintf( __( 'The uploaded file type is not allowed. Must be one of the following: %s', 'gravityforms' ), strtolower( $field['allowedExtensions'] ) ) );
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}
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}
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/**
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* Allows the disabling of file upload whitelisting
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*
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* @param bool false Set to 'true' to disable whitelisting. Defaults to 'false'.
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*/
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$whitelisting_disabled = apply_filters( 'gform_file_upload_whitelisting_disabled', false );
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if ( ! $whitelisting_disabled ) {
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// Whitelist the file type
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$valid_uploaded_filename = GFCommon::check_type_and_ext( $_FILES['file'], $uploaded_filename );
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if ( is_wp_error( $valid_uploaded_filename ) ) {
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GFCommon::log_debug( sprintf( '%s(): %s; %s; %s', __METHOD__, $uploaded_filename, $valid_uploaded_filename->get_error_code(), $valid_uploaded_filename->get_error_message() ) );
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self::die_error( $valid_uploaded_filename->get_error_code(), $valid_uploaded_filename->get_error_message() );
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}
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$valid_file_name = GFCommon::check_type_and_ext( $_FILES['file'], $file_name );
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if ( is_wp_error( $valid_file_name ) ) {
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GFCommon::log_debug( sprintf( '%s(): %s; %s; %s', __METHOD__, $file_name, $valid_file_name->get_error_code(), $valid_file_name->get_error_message() ) );
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self::die_error( $valid_file_name->get_error_code(), $valid_file_name->get_error_message() );
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}
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}
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$tmp_file_name = $form_unique_id . '_input_' . $field_id . '_' . GFCommon::random_str( 16 ) . '_' . $file_name;
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$tmp_file_name = sanitize_file_name( $tmp_file_name );
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$file_path = $target_dir . $tmp_file_name;
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$cleanup_target_dir = true; // Remove old files
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$max_file_age = 5 * 3600; // Temp file age in seconds
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// Remove old temp files
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if ( $cleanup_target_dir ) {
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if ( is_dir( $target_dir ) && ( $dir = opendir( $target_dir ) ) ) {
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while ( ( $file = readdir( $dir ) ) !== false ) {
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$tmp_file_path = $target_dir . $file;
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// Remove temp file if it is older than the max age and is not the current file
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if ( preg_match( '/\.part$/', $file ) && ( filemtime( $tmp_file_path ) < time() - $max_file_age ) && ( $tmp_file_path != "{$file_path}.part" ) ) {
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GFCommon::log_debug( 'GFAsyncUpload::upload(): Deleting file: ' . $tmp_file_path );
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@unlink( $tmp_file_path );
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}
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}
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closedir( $dir );
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} else {
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GFCommon::log_debug( 'GFAsyncUpload::upload(): Failed to open temp directory: ' . $target_dir );
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self::die_error( 100, __( 'Failed to open temp directory.', 'gravityforms' ) );
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}
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}
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if ( isset( $_SERVER['HTTP_CONTENT_TYPE'] ) ) {
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$contentType = $_SERVER['HTTP_CONTENT_TYPE'];
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}
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if ( isset( $_SERVER['CONTENT_TYPE'] ) ) {
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$contentType = $_SERVER['CONTENT_TYPE'];
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}
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$chunk = isset( $_REQUEST['chunk'] ) ? intval( $_REQUEST['chunk'] ) : 0;
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$chunks = isset( $_REQUEST['chunks'] ) ? intval( $_REQUEST['chunks'] ) : 0;
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// Handle non multipart uploads older WebKit versions didn't support multipart in HTML5
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if ( strpos( $contentType, 'multipart' ) !== false ) {
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if ( isset( $_FILES['file']['tmp_name'] ) && is_uploaded_file( $_FILES['file']['tmp_name'] ) ) {
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// Open temp file
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$out = @fopen( "{$file_path}.part", $chunk == 0 ? 'wb' : 'ab' );
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if ( $out ) {
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// Read binary input stream and append it to temp file
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$in = @fopen( $_FILES['file']['tmp_name'], 'rb' );
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if ( $in ) {
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while ( $buff = fread( $in, 4096 ) ) {
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fwrite( $out, $buff );
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}
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} else {
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self::die_error( 101, __( 'Failed to open input stream.', 'gravityforms' ) );
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}
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@fclose( $in );
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@fclose( $out );
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@unlink( $_FILES['file']['tmp_name'] );
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} else {
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self::die_error( 102, __( 'Failed to open output stream.', 'gravityforms' ) );
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}
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} else {
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self::die_error( 103, __( 'Failed to move uploaded file.', 'gravityforms' ) );
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}
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} else {
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// Open temp file
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$out = @fopen( "{$file_path}.part", $chunk == 0 ? 'wb' : 'ab' );
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if ( $out ) {
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// Read binary input stream and append it to temp file
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$in = @fopen( 'php://input', 'rb' );
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if ( $in ) {
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while ( $buff = fread( $in, 4096 ) ) {
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fwrite( $out, $buff );
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}
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} else {
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self::die_error( 101, __( 'Failed to open input stream.', 'gravityforms' ) );
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}
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@fclose( $in );
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@fclose( $out );
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} else {
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self::die_error( 102, __( 'Failed to open output stream.', 'gravityforms' ) );
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}
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}
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if ( ! $chunks || $chunk == $chunks - 1 ) {
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// Upload is complete. Strip the temp .part suffix off
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rename( "{$file_path}.part", $file_path );
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if ( file_exists( $file_path ) ) {
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GFFormsModel::set_permissions( $file_path );
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} else {
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self::die_error( 105, __( 'Upload unsuccessful', 'gravityforms' ) . ' ' . $uploaded_filename );
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}
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gf_do_action( array( 'gform_post_multifile_upload', $form['id'] ), $form, $field, $uploaded_filename, $tmp_file_name, $file_path );
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GFCommon::log_debug( sprintf( 'GFAsyncUpload::upload(): File upload complete. temp_filename: %s uploaded_filename: %s ', $tmp_file_name, $uploaded_filename ) );
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} else {
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if ( file_exists( "{$file_path}.part" ) ) {
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GFFormsModel::set_permissions( "{$file_path}.part" );
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} else {
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self::die_error( 105, __( 'Upload unsuccessful', 'gravityforms' ) . ' ' . $uploaded_filename );
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}
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GFCommon::log_debug( sprintf( 'GFAsyncUpload::upload(): Chunk upload complete. temp_filename: %s uploaded_filename: %s chunk: %d', $tmp_file_name, $uploaded_filename, $chunk ) );
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}
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$output = array(
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'status' => 'ok',
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'data' => array(
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'temp_filename' => $tmp_file_name,
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'uploaded_filename' => str_replace( "\\'", "'", urldecode( $uploaded_filename ) ) //Decoding filename to prevent file name mismatch.
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)
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);
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$output = json_encode( $output );
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die( $output );
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}
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public static function die_error( $status_code, $message ) {
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$response = array();
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$response['status'] = 'error';
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$response['error'] = array(
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'code' => $status_code,
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'message' => $message,
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);
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$response_json = json_encode( $response );
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die( $response_json );
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}
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}
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GFAsyncUpload::upload();
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