如何通過php標頭訪問我的其他服務器上存儲的文件？

Question

有什么方法可以通過原始域名（example.com/dl.php?id=12）中存儲的dl.php文件下載子域（dl1.example.com）中的存儲文件。

在這種情況下，需要下載的文件位於dl1（來自其他服務器的子域，並通過cpanel上的添加DNS記錄選項進行連接）

dl.php使用php標頭為客戶端建立鏈接

從db（$ path）獲取的網址，並用作以下函數的輸入：

downloadFile($path,$file_name, 1024, false);

$ path變量包含以下變量：

$path="http://dl1.example.com/Lamp%20with%20phpmyadmin.mp4";

我的主域名上存儲的文件沒有任何問題，當我想使用子域進行可下載鏈接時發生了問題

我所有的代碼：

/* List of File Types */
function fileTypes($extension){
$fileTypes['swf'] = 'application/x-shockwave-flash';
$fileTypes['pdf'] = 'application/pdf';
$fileTypes['exe'] = 'application/octet-stream';
$fileTypes['zip'] = 'application/zip';
$fileTypes['doc'] = 'application/msword';
$fileTypes['xls'] = 'application/vnd.ms-excel';
$fileTypes['ppt'] = 'application/vnd.ms-powerpoint';
$fileTypes['gif'] = 'image/gif';
$fileTypes['png'] = 'image/png';
$fileTypes['jpeg'] = 'image/jpg';
$fileTypes['jpg'] = 'image/jpg';
$fileTypes['rar'] = 'application/rar';

$fileTypes['ra'] = 'audio/x-pn-realaudio';
$fileTypes['ram'] = 'audio/x-pn-realaudio';
$fileTypes['ogg'] = 'audio/x-pn-realaudio';

$fileTypes['wav'] = 'video/x-msvideo';
$fileTypes['wmv'] = 'video/x-msvideo';
$fileTypes['avi'] = 'video/x-msvideo';
$fileTypes['asf'] = 'video/x-msvideo';
$fileTypes['divx'] = 'video/x-msvideo';

$fileTypes['mp3'] = 'audio/mpeg';
$fileTypes['mp4'] = 'audio/mpeg';
$fileTypes['mpeg'] = 'video/mpeg';
$fileTypes['mpg'] = 'video/mpeg';
$fileTypes['mpe'] = 'video/mpeg';
$fileTypes['mov'] = 'video/quicktime';
$fileTypes['swf'] = 'video/quicktime';
$fileTypes['3gp'] = 'video/quicktime';
$fileTypes['m4a'] = 'video/quicktime';
$fileTypes['aac'] = 'video/quicktime';
$fileTypes['m3u'] = 'video/quicktime';
return $fileTypes[$extention];
};

/*
Parameters: downloadFile(File Location, File Name,
max speed, is streaming
If streaming - videos will show as videos, images as images
instead of download prompt
*/
function downloadFile($fileLocation, $fileName, $maxSpeed = 100,     $doStream = false) {
if (connection_status() != 0)
    return(false);
//    in some old versions this can be pereferable to get extention
//    $extension = strtolower(end(explode('.', $fileName)));
$extension = pathinfo($fileName, PATHINFO_EXTENSION);

$contentType = fileTypes($extension);
header("Cache-Control: public");
header("Content-Transfer-Encoding: binary\n");
header('Content-Type: $contentType');

$contentDisposition = 'attachment';

if ($doStream == true) {
    /* extensions to stream */
    $array_listen = array('mp3', 'm3u', 'm4a', 'mid', 'ogg', 'ra', 'ram', 'wm',
        'wav', 'wma', 'aac', '3gp', 'avi', 'mov', 'mp4', 'mpeg', 'mpg', 'swf', 'wmv', 'divx', 'asf');
    if (in_array($extension, $array_listen)) {
        $contentDisposition = 'inline';
    }
}

if (strstr($_SERVER['HTTP_USER_AGENT'], "MSIE")) {
    $fileName = preg_replace('/\./', '%2e', $fileName, substr_count($fileName, '.') - 1);
    header("Content-Disposition: $contentDisposition;
        filename=\"$fileName\"");
} else {
    header("Content-Disposition: $contentDisposition;
        filename=\"$fileName\"");
}

header("Accept-Ranges: bytes");
$range = 0;
$size = filesize($fileLocation);

if (isset($_SERVER['HTTP_RANGE'])) {
    list($a, $range) = explode("=", $_SERVER['HTTP_RANGE']);
    str_replace($range, "-", $range);
    $size2 = $size - 1;
    $new_length = $size - $range;
    header("HTTP/1.1 206 Partial Content");
    header("Content-Length: $new_length");
    header("Content-Range: bytes $range$size2/$size");
} else {
    $size2 = $size - 1;
    header("Content-Range: bytes 0-$size2/$size");
    header("Content-Length: " . $size);
}

if ($size == 0) {
    die('Zero byte file! Aborting download');
}
set_magic_quotes_runtime(0);
$fp = fopen("$fileLocation", "rb");

fseek($fp, $range);

while (!feof($fp) and ( connection_status() == 0)) {
    set_time_limit(0);
    print(fread($fp, 1024 * $maxSpeed));
    flush();
    ob_flush();
    sleep(1);
}
fclose($fp);

return((connection_status() == 0) and ! connection_aborted());
}

/* Implementation */
// downloadFile('path_to_file/1.mp3', '1.mp3', 1024, false);


if(isset($_GET['i']) && is_numeric($_GET['i'])){
$file_id=input_security($_GET['i']);
$linkque=mysqli_query($connection,"SELECT * FROM download_links WHERE dl_id='".$file_id."'");
$checkexist=mysqli_num_rows($linkque);
$f_row=mysqli_fetch_array($linkque);
    if($checkexist==0){
        echo 'Invalid file id';
    }else if($checkexist>=1 && $f_row['payment_model']=="free"){
    /* Function: download with resume/speed/stream options */
        $path=$f_row['url'];
        $sep_parts = pathinfo($path);
        $file_name  = $sep_parts['basename'];
        $file_ext   = $sep_parts['extension'];
        if (file_exists($path)) {   
        downloadFile($path,$file_name, 1024, false);
        }else{
            echo "File is not exist or url is wrong.";
        }
}else if($checkexist>=1 && $f_row['payment_model']=="nofree"){
    if(isset($_SESSION['username'])){

    $client_id=input_security($_SESSION['username']);
    $client_id_query="SELECT userid FROM users WHERE emailuser='".$client_id."'";
    $session_query=mysqli_query($connection,$client_id_query);
    $clientidrow=mysqli_fetch_assoc($session_query);
    $client_id=$clientidrow['user_id'];
    $link_pid=$f_row['post_id'];
        $userorderque=mysqli_query($connection,"SELECT * FROM user_orders WHERE post_id='".$link_pid."' AND order_client_id='".$client_id."'");
        $checkorderexist=mysqli_num_rows($userorderque);
        $checktobuy_row=mysqli_fetch_array($userorderque);


        if($checkorderexist>=1 && $checktobuy_row['paid']==1){

        $path=$f_row['url'];
        $sep_parts = pathinfo($path);
        $file_name  = $sep_parts['basename'];
        $file_ext   = $sep_parts['extension'];
        if (file_exists($path)){
        //echo "thank you for purchase and support us. You can download now.";
            downloadFile($path,$file_name, 1024, false);
        }else{
            echo "File is not exist or url is wrong.";
        }
        }else if($checkorderexist>=1 && $checktobuy_row['paid']==0){
            echo "You Need to pay for download this file";
        }
    }else{
        echo "This file needs to login";
    }



}else{
    echo "You don't have permission to download this file please purchase this product and trying to download again";
    }
}else{
    header('Location: index.php');
}

我如何從存儲在域名（我的主Web服務器主機（example.com）上的腳本）訪問與子域名（dl1.example.com）連接到我的域名的另一台服務器上的存儲文件）？

我將不勝感激任何幫助

Answer 1

目前還不是100％清楚您的通信流程如何，但是從您的描述中您僅能解決跨域問題。 您可以通過在服務器響應中添加以下標頭來允許服務器上的跨域調用來繼續進行下載：

header("Access-Control-Allow-Origin: *");

在不同的環境下可以找到很好的例子：

https://enable-cors.org/