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使用SWFUpload插件上传文件

时间:2015-07-30 编辑:boystar 来源:CnBlogs

演示代码由两部分组成,包括前台文件和后台文件:

1.前台文件index.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<head>
<title>SWFUpload</title>
<link href="CSS/default.css" rel="stylesheet" type="text/css" />
<!--Swfupload插件begin-->
<script type="text/javascript" src="swfupload/swfupload.JS"></script>
<script type="text/javascript" src="js/swfupload.queue.js"></script>
<script type="text/javascript" src="js/fileprogress.js"></script>
<script type="text/javascript" src="js/handlers.js"></script>
<!--Swfupload插件end-->
<script type="text/javascript">
        var swfu;

        window.onload = function() {
            var settings = {
                Flash_url : "swfupload/swfupload.swf",
                upload_url: "upload.PHP",    // 后台文件
                post_params: {"PHPSESSID" : "<?php echo session_id(); ?>"},
                file_size_limit : "100 MB",
                file_types : "*.*",
                file_types_description : "All Files",
                file_upload_limit : 100,
                file_queue_limit : 0,
                custom_settings : {
                    progressTarget : "fsUploadProgress",
                    cancelButtonId : "btnCancel"
                },
                debug: false,

                // 按钮设置
                button_image_url: "images/TestImageNoText_65x29.png",    // Flash样式图片文件
                button_width: "65",
                button_height: "29",
                button_placeholder_id: "spanButtonPlaceHolder",
                button_text: '<span class="theFont">浏览</span>',
                button_text_style: ".theFont { font-size: 16; }",
                button_text_left_padding: 12,
                button_text_top_padding: 3,
                
                // 句柄设置
                file_queued_handler : fileQueued,
                file_queue_error_handler : fileQueueError,
                file_dialog_complete_handler : fileDialogComplete,
                upload_start_handler : uploadStart,
                upload_progress_handler : uploadProgress,
                upload_error_handler : uploadError,
                upload_success_handler : uploadSuccess,
                upload_complete_handler : uploadComplete,
                queue_complete_handler : queueComplete
            };

            swfu = new SWFUpload(settings);
         };
    </script>
</head>
<body>
<div id="header">
    <h1 id="logo"><a href="/">SWFUpload</a></h1>
    <div id="version">v2.2.0</div>
</div>

<div id="content">
    <form id="form1" action="index.php" method="post" enctype="multipart/form-data">
        <p>点击“浏览”按钮,选择您要上传的文档文件后,系统将自动上传并在完成后提示您。</p>
        <p>请勿上传包含中文文件名的文件!</p>
        <div class="fieldset flash" id="fsUploadProgress">
            <span class="legend">快速上传</span>
      </div>
        <div id="divStatus">0 个文件已上传</div>
            <div>
                <span id="spanButtonPlaceHolder"></span>
                <input id="btnCancel" type="button" value="取消所有上传"  disabled="disabled" style="margin-left: 2px; font-size: 8pt; height: 29px;" />
            </div>

    </form>
</div>
<div align="center">Hanization By <a href="http://imll.net" target="_blank">Leo.C,</a>
</div>
</body>
</html>


2.后台文件upload.php

<?php

// 传递session值(由于Flash与session不兼容,只能通过参数传递获取)
    if (isset($_POST["PHPSESSID"])) {
        ($_POST["PHPSESSID"]);
    } else if (isset($_GET["PHPSESSID"])) {
        ($_GET["PHPSESSID"]);
    }

    ();

// 设置POST最大值
    $POST_MAX_SIZE = ('post_max_size');
    $unit = (($POST_MAX_SIZE, -1));
    $multiplier = ($unit == 'M' ? 1048576 : ($unit == 'K' ? 1024 : ($unit == 'G' ? 1073741824 : 1)));

    if ((int)$_SERVER['CONTENT_LENGTH'] > $multiplier*(int)$POST_MAX_SIZE && $POST_MAX_SIZE) {
        ("HTTP/1.1 500 Internal Server Error");
        echo "POST exceeded maximum allowed size.";
        exit(0);
    }

// 基本设置
    $save_path = () . "/file/";                           // 文件上传位置
    $upload_name = "Filedata";
    $max_file_size_in_bytes = 2147483647;                         // 2GB
    $extension_whitelist = array("doc", "txt", "jpg", "gif", "png");    // 允许文件类型
    $valid_chars_regex = '.A-Z0-9_ !@#$%^&()+={}\[\]\',~`-';            // 文件名规则
    
// 其他变量
    $MAX_FILENAME_LENGTH = 260;
    $file_name = "";
    $file_extension = "";
    $uploadErrors = array(
        0=>"文件上传成功",
        1=>"上传的文件超过了 php.ini 文件中的 upload_max_filesize directive 里的设置",
        2=>"上传的文件超过了 HTML form 文件中的 MAX_FILE_SIZE directive 里的设置",
        3=>"上传的文件仅为部分文件",
        4=>"没有文件上传",
        6=>"缺少临时文件夹"
    );


// 检测文件是否上传正确
    if (!isset($_FILES[$upload_name])) {
        HandleError("No upload found in \$_FILES for " . $upload_name);
        exit(0);
    } else if (isset($_FILES[$upload_name]["error"]) && $_FILES[$upload_name]["error"] != 0) {
        HandleError($uploadErrors[$_FILES[$upload_name]["error"]]);
        exit(0);
    } else if (!isset($_FILES[$upload_name]["tmp_name"]) || !@($_FILES[$upload_name]["tmp_name"])) {
        HandleError("Upload failed is_uploaded_file test.");
        exit(0);
    } else if (!isset($_FILES[$upload_name]['name'])) {
        HandleError("File has no name.");
        exit(0);
    }
    
// 检测文件尺寸
    $file_size = @($_FILES[$upload_name]["tmp_name"]);
    if (!$file_size || $file_size > $max_file_size_in_bytes) {
        HandleError("File exceeds the maximum allowed size");
        exit(0);
    }
    
    if ($file_size <= 0) {
        HandleError("File size outside allowed lower bound");
        exit(0);
    }


// 检测文件名字为空
    $file_name = ('/[^'.$valid_chars_regex.']|\.+$/i', "", ($_FILES[$upload_name]['name']));
    if (($file_name) == 0 || ($file_name) > $MAX_FILENAME_LENGTH) {
        HandleError("Invalid file name");
        exit(0);
    }


// 检测重名文件
    if (($save_path . $file_name)) {
        HandleError("File with this name already exists");
        exit(0);
    }

// 检测后缀名
    $path_info = ($_FILES[$upload_name]['name']);
    $file_extension = $path_info["extension"];
    $is_valid_extension = false;
    foreach ($extension_whitelist as $extension) {
        if (($file_extension, $extension) == 0) {
            $is_valid_extension = true;
            break;
        }
    }
    if (!$is_valid_extension) {
        HandleError("Invalid file extension");
        exit(0);
    }


// 保存文件
    if (!@($_FILES[$upload_name]["tmp_name"], $save_path.$file_name)) {
        HandleError("文件无法保存.");
        exit(0);
    }

// 成功输出

    echo "File Received";
    exit(0);
function HandleError($message) { ("HTTP/1.1 500 Internal Server Error"); echo $message; } ?>