function ewiki_cache_url($url, $cache_min = 1200)
{
global $ewiki_cache_ctype;
#-- check if fresh enough in cache (20min)
$data = ewiki_db::GET($url);
if (time() <= $data["lastmodified"] + $cache_min) {
$ewiki_cache_ctype = $data["Content-Type"];
return $data["content"];
}
#-- retrieve
$req = new http_request("GET", $url);
$req->header["Accept"] = "application/atom+xml, application/rss+xml, text/rss, xml/*, */*rss*";
if ($data["meta"]["Last-Modified"]) {
$req->headers["If-Modified-Since"] = $data["meta"]["Last-Modified"];
}
if ($data["meta"]["Etag"]) {
$req->headers["If-None-Match"] = $data["meta"]["Etag"];
}
$result = $req->go();
#-- create/overwrite cache entry
if ($result->status == 200) {
$data = ewiki_db::CREATE($url, 0x0, "ewiki_cache_url");
$data["flags"] = 0x0;
$data["content"] = $result->body;
foreach ($result->headers as $i => $v) {
$data["meta"][$i] = $v;
}
$data["meta"]["class"] = "temp";
$data["meta"]["kill-after"] = time() + $cache_min;
if ($t = $data["meta"]["Last-Modified"]) {
// $data["lastmodified"] = ewiki_decode_datetime($t);
}
ewiki_db::WRITE($data, "_OVERWRITE=1");
}
$ewiki_cache_ctype = $data["Content-Type"];
return $data["content"];
}
