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rssutils: check if returned data is in gzip format before trying to decode it

This commit is contained in:
Andrew Dolgov 2018-12-14 14:55:36 +03:00
parent de9ff1644f
commit 958fbfedb6
1 changed files with 17 additions and 5 deletions
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22
classes/rssutils.php
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@ -259,9 +259,13 @@ class RSSUtils {
global $fetch_curl_used;
if (!$fetch_curl_used) {
$tmp = @gzdecode($feed_data);
$is_gzipped = RSSUtils::is_gzipped($feed_data);
if ($tmp) $feed_data = $tmp;
if ($is_gzipped) {
$tmp = @gzdecode($feed_data);
if ($tmp) $feed_data = $tmp;
}
}
$feed_data = trim($feed_data);
@ -433,9 +437,15 @@ class RSSUtils {
global $fetch_curl_used;
if (!$fetch_curl_used) {
$tmp = @gzdecode($feed_data);
$is_gzipped = RSSUtils::is_gzipped($feed_data);
if ($tmp) $feed_data = $tmp;
Debug::log("is_gzipped: $is_gzipped", Debug::$LOG_VERBOSE);
if ($is_gzipped) {
$tmp = @gzdecode($feed_data);
if ($tmp) $feed_data = $tmp;
}
}
$feed_data = trim($feed_data);
@ -1602,6 +1612,8 @@ class RSSUtils {
}
}
private static function is_gzipped($feed_data) {
return mb_strpos($feed_data, "\x1f" . "\x8b" . "\x08", 0, "US-ASCII") === 0;
}
}