<?php
// error_reporting(E_ALL);
define(CACHE_PATH, 'cache');
$maxSize = 10000000;
// [bytes], max size of file
$maxTime = 60;
// [s], max download time
$cacheExpireSeconds = 60;
// echo "Fetching ".$_REQUEST['url'];
retrieveFile($_REQUEST['url']);
cleanUpExpired();
function retrieveFile($url)
{
$contents = file_get_contents($url);
$f = CACHE_PATH . "/tmp-" . time() . "-" . rand(0, 1024 * 1024) . "-" . basename($url);
file_put_contents("./" . $f, $contents);
$data = array('filename' => basename($url), 'file' => CACHE_PATH . "/" . basename($f), 'url' => $url);
echo json_encode($data);
}
function cleanUpExpired()
{
// Remove cached files that expired
$files = glob("" . CACHE_PATH . "/*");
foreach ($files as $file) {
if (time() - filemtime($file) > $cacheExpireSeconds) {
@unlink($file);
}
}
}
if (fileValid($bucket, $file, $interval)) {
if (retrieveFile($bucket, $file)) {
return;
}
}
// file expired, create a token, see if search can be done
$token = $file . ".token";
$expiryInterval = 60 * 60;
// someone tried to search 1 hr ago, 1 hr is where fb updates quotas
if (fileValid($bucket, $token, $expiryInterval)) {
// someone else is searching, so retrieve existing file
// XXX: IF I forcefully remove this events file, and if token says someone else is searching, then
// console will have an error saying 404 (file not found). This will go to client and client says
// (I print in jsonStore function) that client has a problem try later. This should be ok. Just
// forcefully remove token file to start search.
retrieveFile($bucket, $file);
// if this fails, do nothing
} else {
// either token is not there, or its old and carried over from previous search
// or someone created token, tried to search but aborted search
// renew token
$content = "foo";
if (storeGCS($content, $bucket, $token) != 0) {
$msg = 'zouk calendar: failed to store token ' . $file;
syslog(LOG_EMERG, $msg);
sendMail($msg);
}
// file not valid, send json object as error
echo "{ \"error\": \"zouk calendar: file not found\" }";
}
} else {