试图这样做，你可以下载。用sftp在php

Question

我试着这样做，以便我可以下载文件，但我有一个问题，不知道如何解决它可以帮助我找到错误吗？

没有任何反应。并帮助我实现这个目标。我不知道如何解决这个问题，所以需要我能得到的所有帮助。

<?php 

require("configuration.php"); 
require("include.php"); 

require_once('./libs/phpseclib/SFTP.php'); 
require_once("./libs/phpseclib/Crypt/AES.php"); 


if(!isset($_SESSION['clientid'])) 
{ 
    //DON'T KNOW HOW THE REQEUSTOR IS!! 
    die(); 
} 

$clientid = $_SESSION['clientid']; 

$serverid = ''; 
$extendedPath = ''; 
$action = ''; 

if(!isset($_GET['serverid']) or !isset($_GET['path']) or !isset($_GET['action'])) 
{ 
    die(); 
} 


$serverid = $_GET['serverid']; 
$extendedPath = $_GET['path']; 
$action = $_GET['action']; 

$boxDetailsSQL = sprintf("SELECT box.boxid, box.ip, box.login, box.password, box.sshport, srv.path 
          FROM %sbox box 
          JOIN %sserver srv ON box.boxid = srv.boxid 
          JOIN %sgroupMember grpm ON (grpm.groupids LIKE CONCAT(srv.groupid, ';%%') 
                 OR grpm.groupids LIKE CONCAT('%%;', srv.groupid, ';%%')) 

          WHERE srv.serverid = %d 
          AND grpm.clientid = %d;", DBPREFIX, DBPREFIX, DBPREFIX, $serverid, $clientid); 

$boxDetails = mysql_query($boxDetailsSQL); 
$rowsBoxes = mysql_fetch_assoc($boxDetails); 

$aes = new Crypt_AES(); 
$aes->setKeyLength(256); 
$aes->setKey(CRYPT_KEY); 

$sftp= new Net_SFTP($rowsBoxes['ip'], $rowsBoxes['sshport']); 

if(!$sftp->login($rowsBoxes['login'], $aes->decrypt($rowsBoxes['password']))) 
{ 
    echo 'Failed to connect'; 
    die(); 
} 


//ACTION SELECTOR 
if($action == 'list') 
{ 
    getlist($rowsBoxes, $extendedPath, $sftp); 
} 

if($action == 'fileUpload') 
{ 
    fileUpload($rowsBoxes, $extendedPath, $sftp); 

} 

if($action == 'download') 
{ 
    delete($rowsBoxes, $extendedPath, $sftp); 
} 

//ACTION FUNCTIONS 

function download($rowsBoxes, $extendedPath, $sftp) 
{ 
    $remoteFile = dirname($rowsBoxes['path']).'/'.trim($extendedPath.'/'); 
    $downloadfile $sftp->put($remoteFile); 

    header('Content-Description: File Transfer'); 
    header('Content-Type: application/octet-stream'); 
    header('Content-Disposition: attachment; filename='.basename($downloadfile)); 
    header('Expires: 0'); 
    header('Cache-Control: must-revalidate'); 
    header('Pragma: public'); 
    header('Content-Length: ' . filesize($downloadfile)); 
    readfile($downloadfile); 

} 

此代码我需要帮助解决。

function download($rowsBoxes, $extendedPath, $sftp) 
{ 
$remoteFile = dirname($rowsBoxes['path']).'/'.trim($extendedPath.'/'); 
$downloadfile $sftp->put($remoteFile); 

header('Content-Description: File Transfer'); 
header('Content-Type: application/octet-stream'); 
header('Content-Disposition: attachment; filename='.basename($downloadfile)); 
header('Expires: 0'); 
header('Cache-Control: must-revalidate'); 
header('Pragma: public'); 
header('Content-Length: ' . filesize($downloadfile)); 
readfile($downloadfile); 

} 

Answer 1

你打电话getList，fileUpload或delete，取决于$ _GET [ '行动']的价值，但你不叫download可言。你已经定义了这个函数，但是你没有在你的代码片段中调用它。而在你的下载功能...

$downloadfile $sftp->put($remoteFile); 

或许你也应该不是这样：

$downloadfile = $sftp->get($remoteFile); 

此外，而不是做filesize($downloadfile)做的strlen($downloadfile)，而是readfile($downloadfile)做echo $downloadfile;。如果你想保存到本地文件做$sftp->get($remoteFile, $downloadfile);

更新代码：

function download($rowsBoxes, $extendedPath, $sftp) 
{ 
$remoteFile = dirname($rowsBoxes['path']).'/'.trim($extendedPath.'/'); 
$downloadfile = $sftp->get($remoteFile); 

header('Content-Description: File Transfer'); 
header('Content-Type: application/octet-stream'); 
header('Content-Disposition: attachment; filename='.basename($downloadfile)); 
header('Expires: 0'); 
header('Cache-Control: must-revalidate'); 
header('Pragma: public'); 
header('Content-Length: ' . strlen($downloadfile)); 
echo $downloadfile; 

} 

如果你想这样做显示的图像做到这一点：

function download($rowsBoxes, $extendedPath, $sftp) 
{ 
$remoteFile = dirname($rowsBoxes['path']).'/'.trim($extendedPath.'/'); 
$downloadfile = $sftp->get($remoteFile); 

$file_extension = strtolower(substr(strrchr($filename,"."),1)); 

switch($file_extension) { 
    case "gif": $ctype="image/gif"; break; 
    case "png": $ctype="image/png"; break; 
    case "jpeg": 
    case "jpg": $ctype="image/jpg"; break; 
    default: 
} 

header('Content-type: ' . $ctype); 
header('Expires: 0'); 
header('Cache-Control: must-revalidate'); 
header('Pragma: public'); 
echo $downloadfile; 

}