is_proxybypass()

Complexity

Conditions	7
Paths	6

Size

Total Lines	41
Code Lines	18

Duplication

Lines	0
Ratio	0 %

Importance

Changes

0

<?php
function is_proxybypass($url)
{
    $http_proxy_host = api_get_setting('vchamilo_httpproxyhost', 'vchamilo');
    $http_proxy_port = api_get_setting('vchamilo_httpproxyport', 'vchamilo');
    $http_proxy_bypass = api_get_setting('vchamilo_httpproxybypass', 'vchamilo');

    // sanity check
    if (empty($http_proxy_host) or empty($http_proxy_bypass)) {
        return false;
    }

    // get the host part out of the url
    if (!$host = parse_url($url, PHP_URL_HOST)) {
        return false;
    }

    // get the possible bypass hosts into an array
    $matches = explode(',', $http_proxy_bypass);

    // check for a match
    // (IPs need to match the left hand side and hosts the right of the url,
    // but we can recklessly check both as there can't be a false +ve)
    $bypass = false;
    foreach ($matches as $match) {
        $match = trim($match);

        // try for IP match (Left side)
        $lhs = substr($host, 0, strlen($match));
        if (strcasecmp($match, $lhs) == 0) {
            return true;
        }

        // try for host match (Right side)
        $rhs = substr($host, -strlen($match));
        if (strcasecmp($match, $rhs) == 0) {
            return true;
        }
    }

    // nothing matched.
    return false;
}