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<?php
/*
* This file is part of Composer.
*
* (c) Nils Adermann <naderman@naderman.de>
* Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Composer\Util;
/**
* Tests URLs against no_proxy patterns.
*/
class NoProxyPattern
{
/**
* @var string[]
*/
protected $rules = array();
/**
* @param string $pattern no_proxy pattern
*/
public function __construct($pattern)
{
$this->rules = preg_split("/[\s,]+/", $pattern);
}
/**
* Test a URL against the stored pattern.
*
* @param string $url
*
* @return true if the URL matches one of the rules.
*/
public function test($url)
{
$host = parse_url($url, PHP_URL_HOST);
$port = parse_url($url, PHP_URL_PORT);
if (empty($port)) {
switch (parse_url($url, PHP_URL_SCHEME)) {
case 'http':
$port = 80;
break;
case 'https':
$port = 443;
break;
}
}
foreach ($this->rules as $rule) {
if ($rule == '*') {
return true;
}
$match = false;
list($ruleHost) = explode(':', $rule);
list($base) = explode('/', $ruleHost);
if (filter_var($base, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {
// ip or cidr match
if (!isset($ip)) {
$ip = gethostbyname($host);
}
if (strpos($ruleHost, '/') === false) {
$match = $ip === $ruleHost;
} else {
// gethostbyname() failed to resolve $host to an ip, so we assume
// it must be proxied to let the proxy's DNS resolve it
if ($ip === $host) {
$match = false;
} else {
// match resolved IP against the rule
$match = self::inCIDRBlock($ruleHost, $ip);
}
}
} else {
// match end of domain
$haystack = '.' . trim($host, '.') . '.';
$needle = '.'. trim($ruleHost, '.') .'.';
$match = stripos(strrev($haystack), strrev($needle)) === 0;
}
// final port check
if ($match && strpos($rule, ':') !== false) {
list(, $rulePort) = explode(':', $rule);
if (!empty($rulePort) && $port != $rulePort) {
$match = false;
}
}
if ($match) {
return true;
}
}
return false;
}
/**
* Check an IP address against a CIDR
*
* http://framework.zend.com/svn/framework/extras/incubator/library/ZendX/Whois/Adapter/Cidr.php
*
* @param string $cidr IPv4 block in CIDR notation
* @param string $ip IPv4 address
*
* @return bool
*/
private static function inCIDRBlock($cidr, $ip)
{
// Get the base and the bits from the CIDR
list($base, $bits) = explode('/', $cidr);
// Now split it up into it's classes
list($a, $b, $c, $d) = explode('.', $base);
// Now do some bit shifting/switching to convert to ints
$i = ($a << 24) + ($b << 16) + ($c << 8) + $d;
$mask = $bits == 0 ? 0 : (~0 << (32 - $bits));
// Here's our lowest int
$low = $i & $mask;
// Here's our highest int
$high = $i | (~$mask & 0xFFFFFFFF);
// Now split the ip we're checking against up into classes
list($a, $b, $c, $d) = explode('.', $ip);
// Now convert the ip we're checking against to an int
$check = ($a << 24) + ($b << 16) + ($c << 8) + $d;
// If the ip is within the range, including highest/lowest values,
// then it's within the CIDR range
return $check >= $low && $check <= $high;
}
}
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