Only download up to 256KiB of HTML for LinkPreview

1 files changed, 2 insertions, 1 deletions

diff --git a/Digitigrade/LinkPreview.php b/Digitigrade/LinkPreview.php
index 706c3c7..718a196 100644
--- a/Digitigrade/LinkPreview.php
+++ b/Digitigrade/LinkPreview.php
@@ -32,7 +32,8 @@ class LinkPreview implements \JsonSerializable {
         // TODO: Respect Content-Type header from response, maybe set an Accept header in the request?
         // I was able to find a URL serving SHIFT-JIS, but they do not specify a charset in the Content-Type header.
         //    https://www2d.biglobe.ne.jp/~msyk/charcode/cp932/Windows-31J-charset.html
-        $c = @file_get_contents($this->url);
+        $max_length = 256 * 1024; // 256KiB should be enough for the document head
+        $c = @file_get_contents($this->url, false, null, 0, $max_length);
         if (!$c)
             return false;
         $d = \Dom\HTMLDocument::createFromString($c, LIBXML_NOERROR);