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implement MAX_FETCH_REQUESTS_PER_HOST: only generating a warning on exceeded quota for the time being

This commit is contained in:
Andrew Dolgov 2019-11-14 07:38:49 +03:00
parent 63ce7ea705
commit cd4b7f1988
1 changed files with 17 additions and 0 deletions
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17
include/functions.php
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@ -63,6 +63,11 @@
define_default('MAX_CONDITIONAL_INTERVAL', 3600*12);
// max interval between forced unconditional updates for servers
// not complying with http if-modified-since (seconds)
define_default('MAX_FETCH_REQUESTS_PER_HOST', 25);
// a maximum amount of allowed HTTP requests per destination host
// during a single update (i.e. within PHP process lifetime)
// this is used to not cause excessive load on the origin server on
// e.g. feed subscription when all articles are being processes
/* tunables end here */
@ -171,6 +176,7 @@
global $fetch_last_modified;
global $fetch_effective_url;
global $fetch_curl_used;
global $fetch_domain_hits;
$fetch_last_error = false;
$fetch_last_error_code = -1;
@ -180,6 +186,9 @@
$fetch_last_modified = "";
$fetch_effective_url = "";
if (!is_array($fetch_domain_hits))
$fetch_domain_hits = [];
if (!is_array($options)) {
// falling back on compatibility shim
@ -222,6 +231,14 @@
if (strpos($url, "//") === 0)
$url = 'http:' . $url;
$url_host = parse_url($url, PHP_URL_HOST);
$fetch_domain_hits[$url_host] += 1;
if ($fetch_domain_hits[$url_host] > MAX_FETCH_REQUESTS_PER_HOST) {
user_error("Exceeded fetch request quota for $url_host: " . $fetch_domain_hits[$url_host], E_USER_WARNING);
#return false;
}
if (!defined('NO_CURL') && function_exists('curl_init') && !ini_get("open_basedir")) {
$fetch_curl_used = true;