大文件分块上传

前端代码

使用file.slice将文件进行分割,然后分别进行异步上传。


<html lang="zh-cn">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title><%= title %>title>
    
    <link rel="stylesheet" href="http://zui.sexy/dist/css/zui.min.css">
  head>
  <body>
    <div class="container" style="margin-top: 30px;">
        <form class="form-inline" method="post" enctype="multipart/form-data">
          <div class="form-group">
            <input type="file" id="fileBig" class="form-control">
          div>
          <button type="submit" class="btn btn-primary">提交button>
        form>
    div>
    
    <script src="http://zui.sexy/assets/jquery.js">script>
    
    <script src="http://zui.sexy/dist/js/zui.min.js">script>
    <script type="text/javascript">
        $('form').submit(function() {
            let file = $(":file")[0].files[0];
            let fileName = file.name;
            let fileSize = file.size;
            console.log('fileSize',fileSize);
            let blockSize = 0.9*1024*1024;
            let num = Math.ceil(fileSize/blockSize);
            let start = 0;
            let end = 0;
            for(let i=1;i<=num;i++){
                end = blockSize*i;
                if(end > fileSize){
                    end = fileSize;
                }
                let block = file.slice(start,end);
                start = end;
                let fd = new FormData();
                fd.append('block',block);
                fd.append('name',fileName);
                fd.append('total',num);
                fd.append('index',i);
                $.ajax({
                    url:"upload.php",
                    type:"POST",
                    data:fd,
                    async:true,
                    processData:false,
                    contentType:false,
                    success:(res)=>{
                        console.log('res_'+i+":");
                        console.log(res);
                    }
                })
            }
            return false;
        });
    script>
  body>
html>

后端代码

在所有的文件上传成功之后,合并生成原来的大文件

$name = $_POST['name'];
$index = $_POST['index'];
$total = $_POST['total'];
echo "name:".$name.PHP_EOL;
echo "index:".$index.PHP_EOL;
echo "total:".$total.PHP_EOL;

move_uploaded_file($_FILES['block']['tmp_name'],'upload/'.$name."_".$index);

$list = scandir('upload');
$num = count($list)-2;
echo "cur_num:".$num.PHP_EOL;
if($num == $total){
    echo "upload done".PHP_EOL;
    echo $cmd = "cat  upload/'{$name}_'* > upload/'{$name}'";
    shell_exec($cmd);
}

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