PHP文件上传进度:文件切片上传

设置文件上传大小限制,修改如下:
upload_max_filesize = 50m; 允许上传文件大小的最大值。默认为2M
post_max_size = 50m; 指通过表单POST给PHP的所能接收的最大值,包括表单里的所有值。默认为8M
max_execution_time = 600; 每个PHP页面运行的最大时间值(秒),默认30秒
max_input_time = 600; 每个PHP页面接收数据所需的最大时间,默认60秒
memory_limit = 128m; 每个PHP页面所吃掉的最大内存,默认8M
 

<!doctype html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport"
        content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <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>
</head>

<body>
    <div id="progress">
        <div id="finish" style="width: 0%;" progress="0"></div>
    </div>
    <form action="./upload.php">
        <input type="file" name="file" id="file">
    </form>
    <script>
        var fileForm = document.getElementById("file");
        var stopBtn = document.getElementById('stop');
        var upload = new Upload();

        fileForm.onchange = function () {
            upload.addFileAndSend(this);
        }

        function Upload() {
            var xhr = new XMLHttpRequest();
            var form_data = new FormData();
            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;
            }
            //停止文件上传
            this.stop = function () {
                xhr.abort();
                is_stop = 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) {
                console.log("发送文件");
                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', file.name);

                xhr.open('POST', './upload.php', false);
                xhr.onreadystatechange = function (res) {
                    var progress;
                    var progressObj = document.getElementById('finish');
                    if (total_blob_num == 1) {
                        progress = '100%';
                    } else {
                        progress = Math.min(100, (blob_num / total_blob_num) * 100) + '%';
                    }
                    progressObj.style.width = progress;

                    if(xhr.readyState != 4){ return; }
                    // if( JSON.parse(res.target.responseText).code==1){ alert("文件上传成功!"); return;}
                    console.log("返回文本:",xhr.readyState, xhr.status, res.target.responseText);
                    // console.log(JSON.parse(res.target.responseText));

                    var t = setTimeout(function () {
                        console.log("检查文件上传进度");
                        if (start < file.size && is_stop === 0) {
                            blob = cutFile(file);
                            sendFile(blob, file);
                            blob_num += 1;
                        } else {
                            setTimeout(t);
                        }
                    }, 100);
                }
                xhr.send(form_data);
            }
        }

    </script>
</body>

</html>

 

 

<?php
ini_set("upload_max_filesize", "20M");

class Upload{
  private $filepath = './upload';   //上传目录
  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
 
  public function __construct($tmpPath,$blobNum,$totalBlobNum,$fileName){
    $this->tmpPath = $tmpPath;
    $this->blobNum = $blobNum;
    $this->totalBlobNum = $totalBlobNum;
    $this->fileName = $fileName;
     
    $this->moveFile();
    $this->fileMerge();
  }
   
  //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($this->blobNum == $this->totalBlobNum){
        if(file_exists($this->filepath.'/'. $this->fileName)){
          $data['code'] = 1;
          $data['msg'] = '文件上传成功';
          $data['file_path'] = '/sss/'.str_replace('.','',$this->filepath).'/'. $this->fileName;
        }
    }else{
        if(file_exists($this->filepath.'/'. $this->fileName.'__'.$this->blobNum)){
          $data['code'] = 0;
          $data['msg'] = '继续上传文件片段';
          $data['file_path'] = '';
        }
    }
    header('Content-type: application/json');
    echo json_encode($data);
  }
   
  //建立上传文件夹
  private function touchDir(){
    if(!file_exists($this->filepath)){
      return mkdir($this->filepath);
    }
  }
}
 
//实例化并获取系统变量传参
$upload = new Upload($_FILES['file']['tmp_name'],$_POST['blob_num'],$_POST['total_blob_num'],$_POST['file_name']);
//调用方法,返回结果
$upload->apiReturn();

 

代码来源忘记了,代码稍作改

修改时间 2019-06-25

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