實現1：前端把文件FILE對象切割成N塊，ajax發到后台，php接收文件並判斷接收了N塊時合並所接收的文件塊，最后刪除文件塊
<!doctype html> <html> <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; const LENGTH = 10 * 10; var start = 0; var end = start + LENGTH; var blob; var blob_num = 1; var is_stop = 0 //對外方法，傳入文件對象 this.addFileAndSend = function(that){ var file = that.files[0]; blob = cutFile(file); sendFile(blob,file); blob_num += 1; } //停止文件上傳 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; }; //發送文件 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 class Upload{ private $filepath = './upload'; //上傳目錄 private $tmpPath; //PHP文件臨時目錄 private $blobNum; //第幾個文件塊 private $totalBlobNum; //文件塊總數 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(); $this->fileMerge(); } //判斷是否是最后一塊，如果是則進行文件合成並且刪除文件塊 private function fileMerge(){ if($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); $this->deleteFileBlob(); } } //刪除文件塊 private function deleteFileBlob(){ for($i=1; $i<= $this->totalBlobNum; $i++){ @unlink($this->filepath.'/'. $this->fileName.'__'.$i); } } //移動文件 private function moveFile(){ $this->touchDir(); $filename = $this->filepath.'/'. $this->fileName.'__'.$this->blobNum; move_uploaded_file($this->tmpPath,$filename); } //API返回數據 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); } //建立上傳文件夾 private function touchDir(){ if(!file_exists($this->filepath)){ return mkdir($this->filepath); } } } //實例化並獲取系統變量傳參 $upload = new Upload($_FILES['file']['tmp_name'],$_POST['blob_num'],$_POST['total_blob_num'],$_POST['file_name']); //調用方法，返回結果 $upload->apiReturn();
實現2：前端把文件切割成二進制信息並一段一段傳給后台，php把接收到的二進制信息整合到一個文件即可
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>大文件切割上傳</title> <link rel="stylesheet" href=""> <script> function selfile(){ const LENGTH = 1024 * 1024 * 10;//每次上傳的大小 var file = document.getElementsByName('video')[0].files[0];//文件對象 var filename=document.getElementsByName('video')[0].files[0].name; var totalSize = file.size;//文件總大小 var start = 0;//每次上傳的開始字節 var end = start + LENGTH;//每次上傳的結尾字節 var fd = null//創建表單數據對象 var blob = null;//二進制對象 var xhr = null;//xhr對象 while(start < totalSize){ fd = new FormData();//每一次需要重新創建 xhr = new XMLHttpRequest();//需要每次創建並設置參數 xhr.open('POST','upload.php',false); blob = file.slice(start,end);//根據長度截取每次需要上傳的數據 fd.append('video',blob);//添加數據到fd對象中 fd.append('filename',filename); //獲取文件的名稱 xhr.send(fd);//將fd數據上傳 //重新設置開始和結尾 start = end; end = start + LENGTH; } } </script> </head> <body> <h1>大文件切割上傳</h1> <input type="file" name="video" onchange="selfile();" /> </body> </html>
<?php /** * 大文件切割上傳，把每次上傳的數據合並成一個文件 */ $filename = './uploads/'.$_POST['filename'];//確定上傳的文件名 //第一次上傳時沒有文件，就創建文件，此后上傳只需要把數據追加到此文件中 if(!file_exists($filename)){ move_uploaded_file($_FILES['video']['tmp_name'],$filename); }else{ file_put_contents($filename,file_get_contents($_FILES['video']['tmp_name']),FILE_APPEND); } ?>