private function displayImage(File $oImageFile)
{
$oHeader = new HTTPHeader();
if (!$oHeader->isModifiedSince($oImageFile->lastModified())) {
$oHeader->setResponseCode(304);
} else {
$oHeader->setResponse('Content-Type', 'image/png');
$oImageFile->readStdOut();
}
}
public function run()
{
try {
// load config
$oProxyConfig = FileConfig::getInstance('xmlproxy.cfg');
$oCommonConfig = FileConfig::getInstance('common.cfg');
// load config vars
$iCacheLifetime = $oCommonConfig->getInteger('cache.lifetime', 600);
$sCacheDir = $oCommonConfig->getString('cache.dir', 'cache');
$iDownloaderTimeout = $oCommonConfig->getInteger('downloader.timeout', 10);
$bXMLHttpRequestOnly = $oProxyConfig->getBoolean('proxy.check_header', true);
$oHeader = new HTTPHeader();
// response to XMLHttpRequest only
if ($bXMLHttpRequestOnly && !$oHeader->isXMLHttpRequest()) {
$oHeader->setResponseCode(204);
return;
}
// get profile URL
$sXmlUrl = $this->getProfileUrl();
// init cache
$oXmlCache = new Cache($sCacheDir, $iCacheLifetime, 'xml');
$oXmlFile = $oXmlCache->getFile($sXmlUrl);
// do we have a cached version of the xml document?
if (!$oXmlFile->isCached()) {
try {
// initialize the downloader
$oProfileLoader = new SteamProfileLoader($sXmlUrl, SteamProfileApp::getUserAgent(), 'Ajax');
$oProfileLoader->setTimeout($iDownloaderTimeout);
$oProfileLoader->setTrimExtra(true);
$oProfileLoader->setFilterCtlChars(true);
$sXml = '';
try {
// try to download the XML file
$sXml = $oProfileLoader->start();
} catch (Exception $e) {
// didn't work, close cURL handle
$oProfileLoader->close();
throw $e;
}
// close cURL handle
$oProfileLoader->close();
// kill invalid characters
$sXml = mb_convert_encoding($sXml, "UTF-8", "UTF-8");
// save document to cache
$oXmlFile->writeString($sXml);
// clear stat cache to ensure that the rest of the
// script will notice the file modification
clearstatcache();
} catch (Exception $e) {
// downloading failed, but maybe we can redirect to the old file
if (!$oXmlFile->exists()) {
// no, we can't
throw $e;
}
}
}
// use client cache, if possible
if (!$oHeader->isModifiedSince($oXmlFile->lastModified())) {
$oHeader->setResponseCode(304);
return;
} else {
$oHeader->setResponse('Content-Type', 'application/xml');
$oXmlFile->readStdOut();
}
} catch (Exception $e) {
// print XML-formatted error
$oError = new XMLError($e);
$oError->build();
}
}