InnerText returning cross-origin iframe text

[Salvador Guerrero Ramos]

Hi

I've been working on a prototype that uses the Element.innerText API to get text from a web page (I'm calling this API with InnerTextAgent). In some web pages the resulting text includes text from cross-origin iframes (e.g. embedded tweets). My expectation is that this would work similarly to the InnerText JS API, which does not return iframe text.

I'm able to reproduce this on Desktop and Android builds of Chromium, but only on certain websites.

Here's a couple of examples:
https://www.sfgate.com/weather/article/sf-flood-warning-california-atmospheric-river-19937062.php
https://www.si.com/nba/celtics/news/celtics-jayson-tatum-reveals-the-simple-reason-boston-took-down-undefeated-cavaliers

Is this the right API to use for this scenario? I'd like to replicate the behavior of the JS API.

[Dave Tapuska]

You really need to debug ShouldContentExtractionIncludeIframe

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[Salvador Guerrero Ramos]

I added log statements to that method as well as its caller InnerTextBuilder::Build. Build() gets the innerText of the HTMLElement it receives, and then iterates through its child_iframes and calls ShouldContentExtractionIncludeIframe on each one. According to the logs the innerText from the argument already contains the iframe text, even before iterating through the iframes.

On Android ShouldContentExtractionIncludeIframe gets called with 3rd party iframes, and it correctly determines that the origins are different so it returns false. On desktop, ShouldContentExtractionIncludeIframe only gets called on about:blank frames.

--Salvador