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selfhostblocks/ttrss/normalize-headers.nix
2023-02-19 20:37:52 -08:00

48 lines
1.1 KiB
Nix

{ pkgs
}:
{ debug ? false
}:
pkgs.writeText "normalize-headers.php" (''
<?php
$trustedProxies = array(
'127.0.0.1',
'@'
);
# phpinfo(INFO_VARIABLES);
if (isSet($_SERVER['REMOTE_ADDR'])) {
$remote = $_SERVER['REMOTE_ADDR'];
$allowedHeaders = array(
'HTTP_X_FORWARDED_FOR' => 'REMOTE_ADDR',
'HTTP_X_REAL_IP' => 'REMOTE_HOST',
'HTTP_X_FORWARDED_PORT' => 'REMOTE_PORT',
'HTTP_X_FORWARDED_HTTPS' => 'HTTPS',
'HTTP_X_FORWARDED_SERVER_ADDR' => 'SERVER_ADDR',
'HTTP_X_FORWARDED_SERVER_NAME' => 'SERVER_NAME',
'HTTP_X_FORWARDED_SERVER_PORT' => 'SERVER_PORT',
'HTTP_X_FORWARDED_PREFERRED_USERNAME' => 'REMOTE_USER',
);
if(in_array($remote, $trustedProxies)) {
foreach($allowedHeaders as $header => $serverVar) {
if(isSet($_SERVER[$header])) {
if(isSet($_SERVER[$serverVar])) {
$_SERVER["ORIGINAL_$serverVar"] = $_SERVER[$serverVar];
}
$_SERVER[$serverVar] = explode(',', $_SERVER[$header], 2)[0];
}
}
}
}
'' + (if !debug then "" else ''
trigger_error(print_r($_SERVER, true), E_USER_WARNING);
'')
)