1、upload.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/html">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<html>
<head>
<title></title>
</head>
<body>
<form enctype="multipart/form-data" id="uploadImg">
上传文件:
<input name="file" type="file" id="file">
</form>
</body>
</html>
<script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script>
<script>
$(function(){
$('input[type="file"]').on('change', function(){
var file = this.files[0];
var formData = new FormData($('#uploadImg')[0]);
formData.append('file', file);
console.log(formData.get('file'))
$.ajax({
url: 'upload.php',
type: 'POST',
cache: false,
data: formData,
//dataType: 'json',
//async: false,
processData: false, //不需要对数据做任何预处理
contentType: false, //不设置数据格式
}).done(function(res) {
console.log(res)
}).fail(function(res) {
console.log(res)
});
});
})
</script>
2、upload.php
<?php
header("Content-type:text/html;charset=utf-8");
//print_r($_FILES);
$uptypes=array(
'image/jpg',
'image/jpeg',
'image/png',
'image/pjpeg',
'image/gif',
'image/bmp',
'image/x-png'
);
$max_file_size=200000000; //上传文件大小限制, 单位BYTE
$file=$_FILES["file"];
$fileName=$file["name"];
$filetype = $file["type"];
$filesize = $file["size"];
if(!in_array($filetype, $uptypes)){ // 文件类型判断
echo "文件类型不符!";
exit;
}
if($filesize > $max_file_size){ // 文件大小判断
echo "文件太大!";
exit;
}
if (!is_dir("image/")) { //创建路径
mkdir("image/");
}
$url = "image/";
//当文件存在
if (file_exists($url.$fileName)) {
//echo $fileName." already exists.";
echo $url.$fileName;
}else{//当文件不存在
$url=$url.$fileName;
move_uploaded_file($_FILES["file"]["tmp_name"],$url);
echo $url;
}
?>
大文件分割上传
JS思路
1.监听上传按钮的onchange事件
2.获取文件的FILE对象
3.把文件的FILE对象进行切割，并且附加到FORMDATA对象中
4.把FORMDATA对象通过AJAX发送到服务器
5.重复3、4步骤，直到文件发送完。
PHP思路
1.建立上传文件夹
2.把文件从上传临时目录移动到上传文件夹
3.所有的文件块上传完成后，进行文件合成
4.删除文件夹
5.返回上传后的文件路径
DEMO代码
<!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"> <input type="button" value="停止" id="stop"> </form> <script> var fileForm = document.getElementById("file"); var stopBtn = document.getElementById('stop'); var upload = new Upload(); fileForm.onchange = function(){ upload.addFileAndSend(this); } stopBtn.onclick = function(){ this.value = "停止中"; upload.stop(); this.value = "已停止"; } 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){ 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 () { 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; var t = setTimeout(function(){ if(start < file.size && is_stop === 0){ blob = cutFile(file); sendFile(blob,file); blob_num += 1; }else{ setTimeout(t); } },1000); } xhr.send(form_data); } } </script> </body> </html>
php代码部分
<?php 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'] = 2; $data['msg'] = 'success'; $data['file_path'] = 'http://'.$_SERVER['HTTP_HOST'].dirname($_SERVER['DOCUMENT_URI']).str_replace('.','',$this->filepath).'/'. $this->fileName; } }else{ if(file_exists($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($this->filepath)){ return mkdir($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();