基于SpringBoot课程在线学习系统设计毕业论文源码

<?php /* * jQuery File Upload Plugin PHP Class 6.1.2 * https://github.com/blueimp/jQuery-File-Upload * * Copyright 2010, Sebastian Tschan * https://blueimp.net * * Licensed under the MIT license: * http://www.opensource.org/licenses/MIT */ class UploadHandler { protected $options; // PHP File Upload error message codes: // http://php.net/manual/en/features.file-upload.errors.php protected $error_messages = array( 1 => 'The uploaded file exceeds the upload_max_filesize directive in php.ini', 2 => 'The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form', 3 => 'The uploaded file was only partially uploaded', 4 => 'No file was uploaded', 6 => 'Missing a temporary folder', 7 => 'Failed to write file to disk', 8 => 'A PHP extension stopped the file upload', 'post_max_size' => 'The uploaded file exceeds the post_max_size directive in php.ini', 'max_file_size' => 'File is too big', 'min_file_size' => 'File is too small', 'accept_file_types' => 'Filetype not allowed', 'max_number_of_files' => 'Maximum number of files exceeded', 'max_width' => 'Image exceeds maximum width', 'min_width' => 'Image requires a minimum width', 'max_height' => 'Image exceeds maximum height', 'min_height' => 'Image requires a minimum height' ); function __construct($options = null, $initialize = true) { $this->options = array( 'script_url' => $this->get_full_url().'/', 'upload_dir' => dirname($_SERVER['SCRIPT_FILENAME']).'/files/', 'upload_url' => $this->get_full_url().'/files/', 'user_dirs' => false, 'mkdir_mode' => 0755, 'param_name' => 'files', // Set the following option to 'POST', if your server does not support // DELETE requests. This is a parameter sent to the client: 'delete_type' => 'DELETE', 'access_control_allow_origin' => '*', 'access_control_allow_credentials' => false, 'access_control_allow_methods' => array( 'OPTIONS', 'HEAD', 'GET', 'POST', 'PUT', 'PATCH', 'DELETE' ), 'access_control_allow_headers' => array( 'Content-Type', 'Content-Range', 'Content-Disposition' ), // Enable to provide file downloads via GET requests to the PHP script: 'download_via_php' => false, // Defines which files can be displayed inline when downloaded: 'inline_file_types' => '/\.(gif|jpe?g|png)$/i', // Defines which files (based on their names) are accepted for upload: 'accept_file_types' => '/.+$/i', // The php.ini settings upload_max_filesize and post_max_size // take precedence over the following max_file_size setting: 'max_file_size' => null, 'min_file_size' => 1, // The maximum number of files for the upload directory: 'max_number_of_files' => null, // Image resolution restrictions: 'max_width' => null, 'max_height' => null, 'min_width' => 1, 'min_height' => 1, // Set the following option to false to enable resumable uploads: 'discard_aborted_uploads' => true, // Set to true to rotate images based on EXIF meta data, if available: 'orient_image' => false, 'image_versions' => array( // Uncomment the following version to restrict the size of // uploaded images: /* '' => array( 'max_width' => 1920, 'max_height' => 1200, 'jpeg_quality' => 95 ), */ // Uncomment the following to create medium sized images: /* 'medium' => array( 'max_width' => 800, 'max_height' => 600, 'jpeg_quality' => 80 ), */ 'thumbnail' => array( 'max_width' => 80, 'max_height' => 80 ) ) ); if ($options) { $this->options = array_merge($this->options, $options); } if ($initialize) { $this->initialize(); } } protected function initialize() { switch ($_SERVER['REQUEST_METHOD']) { case 'OPTIONS': case 'HEAD': $this->head(); break; case 'GET': $this->get(); break; case 'PATCH': case 'PUT': case 'POST': $this->post(); break; case 'DELETE': $this->delete(); break; default: $this->header('HTTP/1.1 405 Method Not Allowed'); } } protected function get_full_url() { $https = !empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off'; return ($https ? 'https://' : 'http://'). (!empty($_SERVER['REMOTE_USER']) ? $_SERVER['REMOTE_USER'].'@' : ''). (isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : ($_SERVER['SERVER_NAME']. ($https && $_SERVER['SERVER_PORT'] === 443 || $_SERVER['SERVER_PORT'] === 80 ? '' : ':'.$_SERVER['SERVER_PORT']))). substr($_SERVER['SCRIPT_NAME'],0, strrpos($_SERVER['SCRIPT_NAME'], '/')); } protected function get_user_id() { @session_start(); return session_id(); } protected function get_user_path() { if ($this->options['user_dirs']) { return $this->get_user_id().'/'; } return ''; } protected function get_upload_path($file_name = null, $version = null) { $file_name = $file_name ? $file_name : ''; $version_path = empty($version) ? '' : $version.'/'; return $this->options['upload_dir'].$this->get_user_path() .$version_path.$file_name; } protected function get_query_separator($url) { return strpos($url, '?') === false ? '?' : '&'; } protected function get_download_url($file_name, $version = null) { if ($this->options['download_via_php']) { $url = $this->options['script_url'] .$this->get_query_separator($this->options['script_url']) .'file='.rawurlencode($file_name); if ($version) { $url .= '&version='.rawurlencode($version); } return $url.'&download=1'; } $version_path = empty($version) ? '' : rawurlencode($version).'/'; return $this->options['upload_url'].$this->get_user_path() .$version_path.rawurlencode($file_name); } protected function set_file_delete_properties($file) { $file->delete_url = $this->options['script_url'] .$this->get_query_separator($this->options['script_url']) .'file='.rawurlencode($file->name); $file->delete_type = $this->options['delete_type']; if ($file->delete_type !== 'DELETE') { $file->delete_url .= '&_method=DELETE'; } if ($this->options['access_control_allow_credentials']) { $file->delete_with_credentials = true; } } // Fix for overflowing signed 32 bit integers, // works for sizes up to 2^32-1 bytes (4 GiB - 1): protected function fix_integer_overflow($size) { if ($size < 0) { $size += 2.0 * (PHP_INT_MAX + 1); } return $size; } protected function get_file_size($file_