Question

我有一个使用php在服务器上生成的.zip文件。生成的文件是有效的，我通过ftp等下载它来检查它。

我需要创建一种方法让用户在生成文件后下载该文件，然后删除该文件。以下是我发送的标题。

header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-control: public");
header("Content-Description: File Transfer");
header('Content-type: application/zip'); 
header("Content-Transfer-Encoding: Binary");
header('Content-Disposition: attachment; filename="'.basename($archive_file_name).'"');
header("Content-Length: " . filesize($this->dirPath."/".$archive_file_name) );
ob_clean();
//echo is_file($this->dirPath."/".$archive_file_name);
readfile($this->dirPath."/".$archive_file_name);
unlink($this->dirPath."/".$archive_file_name);
exit;

上面的代码在我尝试下载前几次时有效，但经过几次转动它开始下载为.php文件，而不是.zip

通过转到开始创建zip文件的特定链接来触发文件下载。完成后，它会发送标题以开始下载

Answer 1

你的代码看起来很合适。但是，您需要确保代码的前后空格在代码中添加标题时，空格会中断并且不会加载zip文件再次检查并删除页面顶部和底部的空格。

一行说明 ReadFile的（$这 - ＆GT; dirPath “/” $ archive_file_name）;
可以从代码中删除

Answer 2

尝试此标题可供您下载简历我建议使用数据库或日志文件来了解下载的文件与否，因为这个标题可用下载器下载部分

从下载程序获取请求范围，您可以使用fseek来读取文件范围

$Range=@$_SERVER['HTTP_RANGE'];//Range: bytes=843530240-
$Cach="";
if($Range!=""){
  $Range=explode("=",$Range);
  $Cach=(int)trim($Range[1]," -");      
}

缓存控制器

function caching_include($file) {
     $headers = $_SERVER;
     // Get the modification timestamp
     if(!(list(,,,,,,,,,$lastModified) = @stat($file))){
           echo Error;
           exit();          
     }
     // Build our entity tag
     $eTag = "ci-".dechex(crc32($file.$lastModified));
     if (false and (strpos(@$headers['If-None-Match'], "$eTag")) &&(gmstrftime("%a, %d %b %Y %T %Z", $lastModified) == @$headers['If-Modified-Since'])) {
        // They already have an up to date copy so tell them
        header('HTTP/1.1 304 Not Modified');
        header('Cache-Control: private');
        header("Pragma: ");
        header('Expires: ');
        header('Content-Type: ');
        header('ETag: "'.$eTag.'"');
        exit;
     } else {
       // We have to send them the whole page
        header('Cache-Control: private');
        header('Pragma: ');
        header('Expires: ');
        header('Last-Modified: '.gmstrftime("%a, %d %b %Y %T %Z",$lastModified));
        header('ETag: "'.$eTag.'"');
     }
  }

标题下载

header("Server: SepidarSoft/ir-system");//server name 
header("Date: ".date("a,d b Y H:M:S GMT",time()));
header("X-Powered-By: SepidarSoft");
header("Cache-Control: public");
header("Content-disposition:filename=\"".$BaseName."\"");//file name
caching_include($FPatch);//caching controller 
header("Accept-Ranges:bytes");
header("Content-Transfer-Encoding: binary\n"); 
header("Connection: Keep-Alive");
header("Content-Type: $Type");//file type like application/zip
header("Content-Length: ".($FSize-$Cach)); //length of download it is for resume  
header("Content-Range: bytes ".$Cach."-".($FSize-1)."/".$FSize); //download range it is for resume
header("HTTP/1.1 206 Partial Content",true);
set_time_limit(0);

如果在代码中使用set_time_limit(0);，如果用户连接变为断开连续php继续直到完成工作，您的文件将被删除，您是否可以在一次请求后下载connection_status()==0进行检查连接，如下所示< / p>

$Speed=102400;
fseek($Handle,$From);//if use resume it is useful 
while(!@feof($Handle) and (connection_status()==0)){
    print(fread($Handle,$Speed));
    flush(); 
            ob_flush(); 
 } 
 if(connection_status()==0){//with this condition you can understand download is down by user 
       unlink($this->dirPath."/".$archive_file_name);
 }

.zip文件下载为.php

2 个答案: