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linkPreviewFetch: Increase maximum HTML we'll process to 1000*1024 bytes

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Scott Nonnenberg 2021-10-14 11:53:53 -07:00 • committed by GitHub
parent fe98f90d70
commit da9df293c6
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 6 additions and 3 deletions
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4
ts/linkPreviews/linkPreviewFetch.ts
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@ -27,9 +27,9 @@ const MAX_CONTENT_TYPE_LENGTH_TO_PARSE = 100;
// Though we'll accept HTML of any Content-Length (including no specified length), we
// will only load some of the HTML. So we might start loading a 99 gigabyte HTML page
// but only parse the first 500 kilobytes. However, if the Content-Length is less than
// but only parse the first 1000 kilobytes. However, if the Content-Length is less than
// this, we won't waste space.
const MAX_HTML_BYTES_TO_LOAD = 500 * 1024;
const MAX_HTML_BYTES_TO_LOAD = 1000 * 1024;
// `<title>x` is 8 bytes. Nothing else (meta tags, etc) will even fit, so we can ignore
// it. This is mostly to protect us against empty response bodies.

5
ts/test-electron/linkPreviews/linkPreviewFetch_test.ts
View file

@ -843,7 +843,7 @@ describe('link preview fetching', () => {
sinon.assert.notCalled(shouldNeverBeCalled);
});
it('stops reading bodies after 500 kilobytes', async function test() {
it('stops reading bodies after 1000 kilobytes', async function test() {
const shouldNeverBeCalled = sinon.stub();
const fakeFetch = stub().resolves(
@ -855,6 +855,9 @@ describe('link preview fetching', () => {
const spaces = new Uint8Array(250 * 1024).fill(32);
yield spaces;
yield spaces;
yield spaces;
yield spaces;
yield spaces;
shouldNeverBeCalled();
yield new TextEncoder().encode(
'<meta property="og:description" content="should be ignored">'