如何进行身份验证的HTTP文件下载?
-
20-09-2019 - |
题
在我的网站我有一个PHP脚本,启动一个文件下载,但不显示文件的完整路径,代码如下所示:
$path = '../examples/test.zip';
$type = "application/zip";
header("Expires: 0");
header("Pragma: no-cache");
header('Cache-Control: no-store, no-cache, must-revalidate');
header('Cache-Control: pre-check=0, post-check=0, max-age=0');
header("Content-Description: File Transfer");
header("Content-Type: " . $type);
header("Content-Length: " .(string)(filesize($path)) );
header('Content-Disposition: attachment; filename="'.basename($path).'"');
header("Content-Transfer-Encoding: binary\n");
readfile($path); // outputs the content of the file
exit();
有是增加一个HTTP认证之前推出的下载方式?
提前感谢!
修改1:强> 由于安德烈·霍夫曼,我通过使用HTTP基本身份验证解决了这个问题! 但是,如果我想使用HTTP摘要式身份验证像下面,我该怎么办? 我试着写了上面的代码,行之后:“回声‘您的登录身份是:’$数据[‘用户名’]。” ...但我得到一个错误说我不能修改头两次!
<?php
$realm = 'Restricted area';
//user => password
$users = array('admin' => 'mypass', 'guest' => 'guest');
if (empty($_SERVER['PHP_AUTH_DIGEST'])) {
header('HTTP/1.1 401 Unauthorized');
header('WWW-Authenticate: Digest realm="'.$realm.
'",qop="auth",nonce="'.uniqid().'",opaque="'.md5($realm).'"');
die('Text to send if user hits Cancel button');
}
// analyze the PHP_AUTH_DIGEST variable
if (!($data = http_digest_parse($_SERVER['PHP_AUTH_DIGEST'])) ||
!isset($users[$data['username']]))
die('Wrong Credentials!');
// generate the valid response
$A1 = md5($data['username'] . ':' . $realm . ':' . $users[$data['username']]);
$A2 = md5($_SERVER['REQUEST_METHOD'].':'.$data['uri']);
$valid_response = md5($A1.':'.$data['nonce'].':'.$data['nc'].':'.$data['cnonce'].':'.$data['qop'].':'.$A2);
if ($data['response'] != $valid_response){
die('Wrong Credentials!');
}
// ok, valid username & password
echo 'Your are logged in as: ' . $data['username'];
// function to parse the http auth header
function http_digest_parse($txt)
{
// protect against missing data
$needed_parts = array('nonce'=>1, 'nc'=>1, 'cnonce'=>1, 'qop'=>1, 'username'=>1, 'uri'=>1, 'response'=>1);
$data = array();
$keys = implode('|', array_keys($needed_parts));
preg_match_all('@(' . $keys . ')=(?:([\'"])([^\2]+?)\2|([^\s,]+))@', $txt, $matches, PREG_SET_ORDER);
foreach ($matches as $m) {
$data[$m[1]] = $m[3] ? $m[3] : $m[4];
unset($needed_parts[$m[1]]);
}
return $needed_parts ? false : $data;
}
?>
<强> SOLUTION:强>
由于安德烈和Anthony,我可以写出溶液:
<?php
$realm = 'Restricted area';
//user => password
$users = array('admin' => 'mypass', 'guest' => 'guest');
if (empty($_SERVER['PHP_AUTH_DIGEST'])) {
header('HTTP/1.1 401 Unauthorized');
header('WWW-Authenticate: Digest realm="'.$realm.
'",qop="auth",nonce="'.uniqid().'",opaque="'.md5($realm).'"');
die('Text to send if user hits Cancel button');
}
// analyze the PHP_AUTH_DIGEST variable
if (!($data = http_digest_parse($_SERVER['PHP_AUTH_DIGEST'])) ||
!isset($users[$data['username']]))
die('Wrong Credentials!');
// generate the valid response
$A1 = md5($data['username'] . ':' . $realm . ':' . $users[$data['username']]);
$A2 = md5($_SERVER['REQUEST_METHOD'].':'.$data['uri']);
$valid_response = md5($A1.':'.$data['nonce'].':'.$data['nc'].':'.$data['cnonce'].':'.$data['qop'].':'.$A2);
if ($data['response'] != $valid_response){
die('Wrong Credentials!');
}
// ok, valid username & password ... start the download
$path = '../examples/test.zip';
$type = "application/zip";
header("Expires: 0");
header("Pragma: no-cache");
header('Cache-Control: no-store, no-cache, must-revalidate');
header('Cache-Control: pre-check=0, post-check=0, max-age=0');
header("Content-Description: File Transfer");
header("Content-Type: " . $type);
header("Content-Length: " .(string)(filesize($path)) );
header('Content-Disposition: attachment; filename="'.basename($path).'"');
header("Content-Transfer-Encoding: binary\n");
readfile($path); // outputs the content of the file
exit();
// function to parse the http auth header
function http_digest_parse($txt)
{
// protect against missing data
$needed_parts = array('nonce'=>1, 'nc'=>1, 'cnonce'=>1, 'qop'=>1, 'username'=>1, 'uri'=>1, 'response'=>1);
$data = array();
$keys = implode('|', array_keys($needed_parts));
preg_match_all('@(' . $keys . ')=(?:([\'"])([^\2]+?)\2|([^\s,]+))@', $txt, $matches, PREG_SET_ORDER);
foreach ($matches as $m) {
$data[$m[1]] = $m[3] ? $m[3] : $m[4];
unset($needed_parts[$m[1]]);
}
return $needed_parts ? false : $data;
}
?>
解决方案
不确定看到此手动。
<?php
if (!isset($_SERVER['PHP_AUTH_USER'])) {
header('WWW-Authenticate: Basic realm="My Realm"');
header('HTTP/1.0 401 Unauthorized');
echo 'Text to send if user hits Cancel button';
exit;
} else {
//check $_SERVER['PHP_AUTH_USER'] and $_SERVER['PHP_AUTH_PW']
if ($valid) {
//start download
$path = '../examples/test.zip';
$type = "application/zip";
header("Expires: 0");
header("Pragma: no-cache");
header('Cache-Control: no-store, no-cache, must-revalidate');
header('Cache-Control: pre-check=0, post-check=0, max-age=0');
header("Content-Description: File Transfer");
header("Content-Type: " . $type);
header("Content-Length: " .(string)(filesize($path)) );
header('Content-Disposition: attachment; filename="'.basename($path).'"');
header("Content-Transfer-Encoding: binary\n");
readfile($path); // outputs the content of the file
exit();
} else {
//show error
}
}
<强>更新强>:
一个基于htaccess的认证实际上可以允许由一个以上的用户使用。 把这个在你的.htaccess:
AuthType Basic
AuthName "Password Required"
AuthUserFile passwords.file
AuthGroupFile groups.file
文件 passwords.file 包含密码可使用与Apache附带的htpasswd
工具来创建。
文件 groups.file 谨类似于:
GroupName: rbowen dpitts sungo rshersey
在这里,你基本上只是列表中的用户应该有权访问该目录。
请同时参阅本教程。
其他提示
您尝试具有脚本回声后开始下载“您已成功登录为...”?
您有任何输出到屏幕后,您不能设置任何头。只要你回声或打印或什么具备的,你,你已开始的HTTP响应,这意味着标头已被设置的主体部分。
顺便说一句,如果你尝试设置的头,然后给一点“你已经登录”,将卡住的文件中,而不是输出到屏幕上。
您想要做的是有脚本输出“您登录”,并在重定向以发送下载头脚本。用户将不会看到第二页,作为标题设置为“附件”。这是多么典型的“您的下载将立即开始”的网页。
不隶属于 StackOverflow