登錄網站，並重定向到文件下載

Question

我已經設法通過curl登錄到一個網站，但現在我想重定向到一個文件下載。該文件需要登錄cookie才能下載。我將如何去重定向和使用我以前保存的cookie？登錄成功後，我試圖設置下面的網址，但沒有奏效。

<?php 
$username = "user"; 
$password = "pass"; 
$url = "https://www.example.com/login"; 
$urldl = "https://www.example.com/get-download/abc.xyz"; 
$cookie = "cookie.txt"; 

$ch = curl_init(); 
curl_setopt($ch, CURLOPT_URL, $url); 
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie); 
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie); 
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
$response = curl_exec($ch); 

if (curl_errno($ch)) die(curl_error($ch)); 

$doc = new DOMDocument(); 
libxml_use_internal_errors(true); 
$doc->loadHTML($response); 
$token = $doc->getElementById("csrf_token")->attributes->getNamedItem("value")->value; 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, false); 
curl_setopt($ch, CURLOPT_POST, true); 
$params = array(
    'username' => $username, 
    'password' => $password, 
    'csrf_token' => $token 
); 
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($params)); 
curl_exec($ch); 

if (curl_errno($ch)) print curl_error($ch); 


curl_setopt($ch, CURLOPT_URL, $urldl); 
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie); 
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
curl_exec($ch); 


curl_close($ch); 

Answer 1

你有CURLOPT_RETURNTRANSFER啓用，但你實際上沒有從curl_exec

// I want the result returned from exec 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
// but I'm not gonna do anything with it... 
curl_exec($ch); 

所獲得的價值所以，你應該賦值給一個值，set the header appropriately，然後打印響應。

$result = curl_exec($ch); 
header('Content-Type: application/octet-stream'); 
header('Content-Disposition: attachment; filename="foo.bar"'); 
echo $result;