public function getHeaders()
{
$headers = $this->headers;
Log::add($headers, 'headers raw');
// For HTML content, overwrite upstream cache conf.
if (isset($headers['Cache-Control'])) {
if ($this->getContentType() == $this::CONTENT_TYPE_TEXT_HTML) {
unset($headers['Cache-Control']);
}
} else {
if ($this->getContentType() == $this::CONTENT_TYPE_OTHER) {
$headers['Cache-Control'] = getCacheControlHeader(60 * 60, 60 * 60, 60 * 60 * 24);
}
}
// If redirect, rewrite Location header.
if (isset($headers['Location'])) {
if (parse_url($headers['Location'], PHP_URL_HOST)) {
TextExternalUrlFilters::applyAll($headers['Location']);
}
// Header redirects require full URLs, with scheme and host.
if (!parse_url($headers['Location'], PHP_URL_HOST)) {
$headers['Location'] = RedirectWhenBlockedFull::getBaseUrl(true) . ltrim($headers['Location'], '/');
}
}
// Rewrite set-cookie headers (or remove if cookies disabled).
if (isset($headers['Set-Cookie'])) {
if (!Conf::$cookies_enabled) {
unset($headers['Set-Cookie']);
} else {
if (is_array($headers['Set-Cookie'])) {
foreach ($headers['Set-Cookie'] as &$set_cookie) {
$set_cookie = $this->getFilteredSetCookie($set_cookie);
}
} else {
$headers['Set-Cookie'] = $this->getFilteredSetCookie($headers['Set-Cookie']);
}
}
}
// Unset some.
$skip = array('Connection', 'Content-Encoding', 'Transfer-Encoding', 'X-Original-Content-Encoding');
foreach ($skip as $s) {
if (isset($headers[$s])) {
unset($headers[$s]);
}
}
Log::add($headers, 'headers filtered');
return $headers;
}
<?php
$apk_url = RedirectWhenBlockedFull::getBaseUrl() . '?' . RedirectWhenBlockedFull::QUERY_STRING_PARAM_NAME . '=' . Conf::OUTPUT_TYPE_APK;
$url = 'https://chart.googleapis.com/chart?chs=200x200&cht=qr&chl=' . urlencode($apk_url) . '&choe=UTF-8';
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$response = curl_exec($ch);
curl_close($ch);
if ($response) {
header('Cache-Control: ' . getCacheControlHeader(60 * 60 * 24, 60 * 60 * 24 * 7, 60 * 60 * 24 * 7));
header('Content-Type: image/png');
print $response;
}
public function getUrl()
{
static $url;
if (!isset($url)) {
if (isset($_GET[RedirectWhenBlockedFull::QUERY_STRING_PARAM_NAME]) && $_GET[RedirectWhenBlockedFull::QUERY_STRING_PARAM_NAME] == Conf::OUTPUT_TYPE_APK && Conf::$apk_url) {
$url = Conf::$apk_url;
$filename = basename(parse_url($url, PHP_URL_PATH));
header('Content-Disposition: attachment; filename=' . $filename);
// Run after all other code to override other content-type header.
register_shutdown_function(function () {
header('Content-Type: application/vnd.android.package-archive');
});
} else {
$url = RedirectWhenBlockedFull::getRequestUriWithoutQueryStringParam();
$this->removeThisScriptDirFromUrl($url);
if (startsWith($url, '/http://') || startsWith($url, '/https://')) {
$url = substr($url, 1);
if (!TextExternalUrlFilters::matchesUrl($url)) {
header('HTTP/1.0 403 Forbidden');
exit;
}
// If we for some reason have the default upstream host and scheme in the URL, remove them.
$url_components = parse_url($url);
if ($url_components['host'] == Conf::getDefaultUpstreamBaseUrlComponent('host') && $url_components['scheme'] == Conf::getDefaultUpstreamBaseUrlComponent('scheme')) {
$new_url = http_build_path_query_fragment($url_components);
$new_url = RedirectWhenBlockedFull::getBaseUrl() . ltrim($new_url, '/');
header('Location: ' . $new_url);
exit;
}
// Use in DomUtlFilters for relative URLs.
$base_url_suffix = rtrim(http_build_scheme_host($url), '/') . '/';
RedirectWhenBlockedFull::setBaseUrlSuffix($base_url_suffix);
} else {
if ($url == '/') {
if (Conf::$default_upstream_url) {
$url = Conf::$default_upstream_url;
}
}
$url = Conf::$default_upstream_base_url . $url;
}
}
}
// Reverse rewrites of parameters inside URL.
TextExternalUrlFilters::applyReverse($url);
Log::add($url, 'url');
return $url;
}
private static function getBaseUrlHostAndPath()
{
static $host_and_path;
if (!isset($host_and_path)) {
$base_url_components = parse_url(RedirectWhenBlockedFull::getBaseUrl());
$host_and_path = $base_url_components['host'];
if (isset($base_url_components['path'])) {
$host_and_path .= $base_url_components['path'];
}
}
return $host_and_path;
}
public static function getBaseTag()
{
return '<base href="' . RedirectWhenBlockedFull::getBaseUrl(true) . '" target="' . self::TOP_WINDOW_NAME . '">';
}
