supernets/hardlounge
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Merge pull request #1567 from dgw/preview-length-abort

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Abort image prefetch if Content-Length exceeds limit
This commit is contained in:
Pavel Djundik 2017-09-25 23:11:20 +03:00 committed by GitHub
commit 08edc434ca
1 changed files with 8 additions and 1 deletions
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9
src/plugins/irc-events/link.js
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@ -159,7 +159,14 @@ function fetch(uri, cb) {
var limit = Helper.config.prefetchMaxImageSize * 1024;
req
.on("response", function(res) {
if (!(/^image\/.+/.test(res.headers["content-type"]))) {
if (/^image\/.+/.test(res.headers["content-type"])) {
// response is an image
// if Content-Length header reports a size exceeding the prefetch limit, abort fetch
const contentLength = parseInt(res.headers["content-length"], 10) || 0;
if (contentLength > limit) {
req.abort();
}
} else {
// if not image, limit download to 50kb, since we need only meta tags
// twitter.com sends opengraph meta tags within ~20kb of data for individual tweets
limit = 1024 * 50;