PHP分片上传

模板页面

1).CSS样式文件

 

<style>
    #progress{
        width: 300px;
        height: 20px;
        background-color:#f7f7f7;
        box-shadow:inset 0 1px 2px rgba(0,0,0,0.1);
        border-radius:4px;
        background-image:linear-gradient(to bottom,#f5f5f5,#f9f9f9);
    }

    .finish{
        background-color: #149bdf;
        background-image:linear-gradient(45deg,rgba(255,255,255,0.15) 25%,transparent 25%,transparent 50%,rgba(255,255,255,0.15) 50%,rgba(255,255,255,0.15) 75%,transparent 75%,transparent);
        background-size:40px 40px;
        height: 100%;
    }
    form{
        margin-top: 50px;
    }
</style>

2）.html文件

<div id="progress">
    <div id="finish_video" class="finish" style="width: 0%;" progress="0"></div>
    <input type="hidden" name="VideoName" id="VideoName">
</div>

                                        <div class="btn-group">
                                            <input id="video_file" type="file" class="file-input" style="visibility: hidden">
                                            <span class="btn btn-info btn-upload" style="position: absolute;top: 0;" onclick="  $(this).prev('input').trigger('click'); ">上传</span>
                                        </div>

3）.页面JS

    //分片上传
    //上传视频
    var fileNameTime = Date.parse(new Date())/1000;

    var video_file = document.getElementById("video_file");
    var jdt_s = document.getElementById('finish_video');
    var ipt_s = $('#VideoName');
    var video_upload = new Upload(jdt_s,ipt_s);
    video_file.onchange = function(){
        fileNameTime = fileNameTime+1;
        video_upload.addFileAndSend(this);
    };

    function Upload(jdt,ipt){
        const LENGTH = 1024 * 1024;
        var start = 0;
        var end = start + LENGTH;
        var blob;
        var blob_num = 1;
        var is_stop = 0;
        //对外方法，传入文件对象
        this.addFileAndSend = function(that){
            var file = that.files[0];
            blob = cutFile(file);
            sendFile(blob,file);
            blob_num  += 1;
        };
        //切割文件
        function cutFile(file){
            var file_blob = file.slice(start,end);
            start = end;
            end = start + LENGTH;
            return file_blob;
        }
        //发送文件
        function sendFile(blob,file){
            var xhr = new XMLHttpRequest();
            var form_data = new FormData();
            var total_blob_num = Math.ceil(file.size / LENGTH);
            form_data.append('file',blob);
            form_data.append('blob_num',blob_num);
            form_data.append('total_blob_num',total_blob_num);
            form_data.append('file_name',fileNameTime+file.name.substr(file.name.lastIndexOf(".")));

            xhr.open('POST','{:url('cut_upload')}',false);
            xhr.onreadystatechange  = function () {
                var progress;
                var progressObj = jdt;
                if(total_blob_num == 1){
                    progress = '100%';
                }else{
                    progress = Math.min(100,(blob_num/total_blob_num)* 100 ) +'%';
                }
                progressObj.style.width = progress;
                progressObj.innerHTML=progress;
                var t = setTimeout(function(){
                    if(start < file.size && is_stop === 0){
                        blob = cutFile(file);
                        sendFile(blob,file);
                        blob_num  += 1;
                    }else{
                        var responsePath = xhr.responseText;
                        var firstPath = responsePath.indexOf("{");
                        var lastPath = responsePath.indexOf("}");
                        var pathReturn = responsePath.substr(firstPath,lastPath-firstPath+1);
                        var pathReturnObj = eval('(' + pathReturn + ')');
                        ipt.val(pathReturnObj.file_path);
                        layer.success('上传成功');
                        xhr = undefined;
                        form_data = undefined;
                    }
                },1000);
            };
            xhr.send(form_data);
        }
    }

PHP后台

    public function cut_upload()
    {
        //实例化并获取系统变量传参
        $upload = new UploadService('video',$_FILES['file']['tmp_name'],$_POST['blob_num'],$_POST['total_blob_num'],$_POST['file_name']);
        //调用方法，返回结果
        $upload->apiReturn();
    }

<?php

namespace app\admin\controller;

class UploadService
{
    private $filepath;
    private $tmpPath;  //PHP文件临时目录
    private $blobNum; //第几个文件块
    private $totalBlobNum; //文件块总数
    private $fileName; //文件名
    private $savePath; //保存路径
    private $basePath;

    public function __construct($type, $tmpPath,$blobNum,$totalBlobNum,$fileName){
        $this->tmpPath =  $tmpPath;
        $this->blobNum =  $blobNum;
        $this->totalBlobNum =  $totalBlobNum;
        $this->fileName =  $fileName;
        $this->savePath =  date('Ymd',mb_substr($fileName,0,10));
        $this->DataPath = date('Ymd',time());
        $this->filepath = ROOT_PATH.'/public/uploads/'.$type .'/'.$this->DataPath.'/';
        $this->basePath = ROOT_PATH.'/public/uploads/'.$type;
    }

    //判断是否是最后一块，如果是则进行文件合成并且删除文件块
    private function fileMerge(){
        if($this->blobNum == $this->totalBlobNum){
            $blob = '';
            for($i=1; $i<= $this->totalBlobNum; $i++){
                $blob .= file_get_contents($this->filepath.'/'. $this->fileName.'__'.$i);
            }
            file_put_contents($this->filepath.'/'. $this->fileName,$blob);
            $this->deleteFileBlob();
        }
    }

    //删除文件块
    private function deleteFileBlob(){
        for($i=1; $i<= $this->totalBlobNum; $i++){
            @unlink($this->filepath.'/'. $this->fileName.'__'.$i);
        }
    }

    //移动文件
    private function moveFile(){
        $this->touchDir();
        $filename = $this->filepath.'/'. $this->fileName.'__'.$this->blobNum;
        move_uploaded_file($this->tmpPath,$filename);
    }

    //API返回数据
    public function apiReturn(){
        if(!file_exists($this->basePath)){
            mkdir($this->basePath);
        }
        $this->moveFile();
        $this->fileMerge();
        if($this->blobNum == $this->totalBlobNum){
            if(file_exists($this->filepath.'/'. $this->fileName)){
                $data['code'] = 2;
                $data['msg'] = 'success';
                //$_SERVER['DOCUMENT_URI']=>$_SERVER['REQUEST_URI']
//                $data['file_path'] = 'http://'.$_SERVER['HTTP_HOST'].dirname($_SERVER['REQUEST_URI']).str_replace('.','',$this->filepath).'/'. $this->fileName;
                $data['file_path'] = '/uploads/video/'.$this->DataPath.'/'.$this->fileName;
            }
        }else{
            if(file_exists($this->filepath.'/'. $this->fileName.'__'.$this->blobNum)){
                $data['code'] = 1;
                $data['msg'] = 'waiting for all';
                $data['file_path'] = '';
            }
        }
        header('Content-type: application/json');
        echo json_encode($data);
    }

    //建立上传文件夹
    private function touchDir(){
        if(!file_exists($this->filepath)){
            mkdir($this->filepath);
        }
    }

}