js实现分割上传大文件_Javascript教程-查字典教程网

摘要：本文实例介绍了js上传文件操作，分享给大家供大家参考，具体内容如下分割大文件上传#test{width:200px;height:100px...

本文实例介绍了js上传文件操作，分享给大家供大家参考，具体内容如下

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang="zh-CN"> <head> <title>分割大文件上传</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <style> #test{ width: 200px; height: 100px; border: 1px solid green; display: none; } #img{ width: 50px; height: 50px; display: none; } #upimg{ text-align: center; font: 8px/10px '微软雅黑','黑体',sans-serif; width: 300px; height: 10px; border: 1px solid green; } #load{ width: 0%; height: 100%; background: green; text-align: center; } </style> </head> <body> <form enctype="multipart/form-data" action="file.php" method="post">  <div id="upimg"> <div id="load"></div> </div> <input type="file" name="mof" multiple="multiple"/> <input type="button" value="uploadfile" /> <input type="submit" value="submit" /> </form> <div id="test"> 测试是否DIV消失 </div> <script type="text/javascript"> var dom=document.getElementsByTagName('form')[0]; dom.onsubmit=function(){ //return false; } var xhr=new XMLHttpRequest(); var fd; var des=document.getElementById('load'); var num=document.getElementById('upimg'); var file; const LENGTH=10*1024*1024; var start; var end; var blob; var pecent; var filename; //var pending; //var clock; function upfile(){ start=0; end=LENGTH+start; //pending=false; file=document.getElementsByName('mof')[0].files[0]; //filename = file.name; if(!file){ alert('请选择文件'); return; } //clock=setInterval('up()',1000); up(); } function up(){ /* if(pending){ return; } */ if(start<file.size){ xhr.open('POST','file.php',true); //xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded'); xhr.onreadystatechange=function(){ if(this.readyState==4){ if(this.status>=200&&this.status<300){ if(this.responseText.indexOf('failed') >= 0){ //alert(this.responseText); alert('文件发送失败，请重新发送'); des.style.width='0%'; //num.innerHTML=''; //clearInterval(clock); }else{ //alert(this.responseText) // pending=false; start=end; end=start+LENGTH; setTimeout('up()',1000); } } } } xhr.upload.onprogress=function(ev){ if(ev.lengthComputable){ pecent=100*(ev.loaded+start)/file.size; if(pecent>100){ pecent=100; } //num.innerHTML=parseInt(pecent)+'%'; des.style.width=pecent+'%'; des.innerHTML = parseInt(pecent)+'%' } } //分割文件核心部分slice blob=file.slice(start,end); fd=new FormData(); fd.append('mof',blob); fd.append('test',file.name); //console.log(fd); //pending=true; xhr.send(fd); }else{ //clearInterval(clock); } } function change(){ des.style.width='0%'; } </script> </body> </html>

file.php:

<?php /**** waited ****/ //print_r($_FILES);exit; $file = $_FILES['mof']; $type = trim(strrchr($_POST['test'], '.'),'.'); // print_r($_POST['test']);exit; if($file['error']==0){ if(!file_exists('./upload/upload.'.$type)){ if(!move_uploaded_file($file['tmp_name'],'./upload/upload.'.$type)){ echo 'failed'; } }else{ $content=file_get_contents($file['tmp_name']); if (!file_put_contents('./upload/upload.'.$type, $content,FILE_APPEND)) { echo 'failed'; } } }else{ echo 'failed'; } ?>

1 运行：

js实现分割上传大文件1

2 选择2G文件测试:

js实现分割上传大文件2

3 完成并正常播放:

js实现分割上传大文件3

以上就是本文的全部内容，希望对大家的学习有所帮助。