webuploader 实现大文件 分片上传

webuploader 分片上传文件

最近研究了下大文件上传的方法，找到了webuploader js 插件进行大文件上传。

使用

 使用webuploader分成简单直选要引入

<link rel="stylesheet" type="text/css" href="webuploader文件夹/webuploader.css">


<script type="text/javascript" src="webuploader文件夹/webuploader.js">script>

HTML部分

<div id="uploader" class="wu-example">
    
    <div id="thelist" class="uploader-list">div>
    <div class="btns">
        <div id="picker">选择文件div>
        <button id="ctlBtn" class="btn btn-default">开始上传            button>
    div>
    div>

初始化Web Uploader

jQuery(function() {
        $list = $('#thelist'),
            $btn = $('#ctlBtn'),
            state = 'pending',
            uploader;

        uploader = WebUploader.create({
            // 不压缩image
            resize: false,
            // swf文件路径
            swf: 'uploader.swf',
            // 文件接收服务端。
            server: upload.php,
            // 选择文件的按钮。可选。
            // 内部根据当前运行是创建，可能是input元素，也可能是flash.
            pick: '#picker',
            chunked: true,
            chunkSize:2*1024*1024,
            auto: true,
            accept: {
                title: 'Images',
                extensions: 'gif,jpg,jpeg,bmp,png',
                mimeTypes: 'image/*'
            }
        });

upload.php处理

一下是根据别人的例子自己拿来改的php 后台代码

header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
        header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
        header("Cache-Control: no-store, no-cache, must-revalidate");
        header("Cache-Control: post-check=0, pre-check=0", false);
        header("Pragma: no-cache");

        if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
            exit; // finish preflight CORS requests here
        }
        if ( !empty($_REQUEST[ 'debug' ]) ) {
            $random = rand(0, intval($_REQUEST[ 'debug' ]) );
            if ( $random === 0 ) {
                header("HTTP/1.0 500 Internal Server Error");
                exit;
            }
        }

        // header("HTTP/1.0 500 Internal Server Error");
        // exit;
        // 5 minutes execution time
        @set_time_limit(5 * 60);
        // Uncomment this one to fake upload time
        // usleep(5000);
        // Settings
        // $targetDir = ini_get("upload_tmp_dir") . DIRECTORY_SEPARATOR . "plupload";
        $targetDir = 'uploads'.DIRECTORY_SEPARATOR.'file_material_tmp';
        $uploadDir = 'uploads'.DIRECTORY_SEPARATOR.'file_material';
        $cleanupTargetDir = true; // Remove old files
        $maxFileAge = 5 * 3600; // Temp file age in seconds
        // Create target dir
        if (!file_exists($targetDir)) {
            @mkdir($targetDir);
        }
        // Create target dir
        if (!file_exists($uploadDir)) {
            @mkdir($uploadDir);
        }
        // Get a file name
        if (isset($_REQUEST["name"])) {
            $fileName = $_REQUEST["name"];
        } elseif (!empty($_FILES)) {
            $fileName = $_FILES["file"]["name"];
        } else {
            $fileName = uniqid("file_");
        }
        $oldName = $fileName;
        $filePath = $targetDir . DIRECTORY_SEPARATOR . $fileName;
       // $uploadPath = $uploadDir . DIRECTORY_SEPARATOR . $fileName;
       // Chunking might be enabled
        $chunk = isset($_REQUEST["chunk"]) ? intval($_REQUEST["chunk"]) : 0;
        $chunks = isset($_REQUEST["chunks"]) ? intval($_REQUEST["chunks"]) : 1;
       // Remove old temp files
        if ($cleanupTargetDir) {
            if (!is_dir($targetDir) || !$dir = opendir($targetDir)) {
                die('{"jsonrpc" : "2.0", "error" : {"code": 100, "message": "Failed to open temp directory."}, "id" : "id"}');
            }
            while (($file = readdir($dir)) !== false) {
                $tmpfilePath = $targetDir . DIRECTORY_SEPARATOR . $file;
                // If temp file is current file proceed to the next
                if ($tmpfilePath == "{$filePath}_{$chunk}.part" || $tmpfilePath == "{$filePath}_{$chunk}.parttmp") {
                    continue;
                }
                // Remove temp file if it is older than the max age and is not the current file
                if (preg_match('/\.(part|parttmp)$/', $file) && (@filemtime($tmpfilePath) < time() - $maxFileAge)) {
                    @unlink($tmpfilePath);
                }
            }
            closedir($dir);
        }

        // Open temp file
        if (!$out = @fopen("{$filePath}_{$chunk}.parttmp", "wb")) {
            die('{"jsonrpc" : "2.0", "error" : {"code": 102, "message": "Failed to open output stream."}, "id" : "id"}');
        }
        if (!empty($_FILES)) {
            if ($_FILES["file"]["error"] || !is_uploaded_file($_FILES["file"]["tmp_name"])) {
                die('{"jsonrpc" : "2.0", "error" : {"code": 103, "message": "Failed to move uploaded file."}, "id" : "id"}');
            }
            // Read binary input stream and append it to temp file
            if (!$in = @fopen($_FILES["file"]["tmp_name"], "rb")) {
                die('{"jsonrpc" : "2.0", "error" : {"code": 101, "message": "Failed to open input stream."}, "id" : "id"}');
            }
        } else {
            if (!$in = @fopen("php://input", "rb")) {
                die('{"jsonrpc" : "2.0", "error" : {"code": 101, "message": "Failed to open input stream."}, "id" : "id"}');
            }
        }
        while ($buff = fread($in, 4096)) {
            fwrite($out, $buff);
        }
        @fclose($out);
        @fclose($in);
        rename("{$filePath}_{$chunk}.parttmp", "{$filePath}_{$chunk}.part");
        $index = 0;
        $done = true;
        for( $index = 0; $index < $chunks; $index++ ) {
            if ( !file_exists("{$filePath}_{$index}.part") ) {
                $done = false;
                break;
            }
        }



        if ( $done ) {
            $pathInfo = pathinfo($fileName);
            $hashStr = substr(md5($pathInfo['basename']),8,16);
            $hashName = time() . $hashStr . '.' .$pathInfo['extension'];
            $uploadPath = $uploadDir . DIRECTORY_SEPARATOR .$hashName;

            if (!$out = @fopen($uploadPath, "wb")) {
                die('{"jsonrpc" : "2.0", "error" : {"code": 102, "message": "Failed to open output stream."}, "id" : "id"}');
            }
            if ( flock($out, LOCK_EX) ) {
                for( $index = 0; $index < $chunks; $index++ ) {
                    if (!$in = @fopen("{$filePath}_{$index}.part", "rb")) {
                        break;
                    }
                    while ($buff = fread($in, 4096)) {
                        fwrite($out, $buff);
                    }
                    @fclose($in);
                    @unlink("{$filePath}_{$index}.part");
                }
                flock($out, LOCK_UN);
            }
            @fclose($out);
            $response = [
                'success'=>true,
                'oldName'=>$oldName,
                'filePaht'=>$uploadPath,
                'fileSize'=>$data['size'],
                'fileSuffixes'=>$pathInfo['extension'],
                'file_id'=>$data['id'],
                ];

            die(json_encode($response));
        }

      // Return Success JSON-RPC response
        die('{"jsonrpc" : "2.0", "result" : null, "id" : "id"}');

官方文档有提供各种API详细了解可以在官方文档里找到你想要的。