Lua page script timeouts when trying to render binary pages

[lopuhin]

When the page is not an html page but binary content (we can not know for sure when extracting links), the Lua script timeouts (even without HH enabled).
No only we do not download such pages, but this also slows down the whole crawl a lot.

[kmike]

what happens? is it because timeout is not large enough to download a file, or is it a problem because Splash doesn't handle non-html splash:go?

[lopuhin]

It's the latter - just plain

function main(splash)
  local url = splash.args.url
  assert(splash:go{url})
end

fails timeouts

[lopuhin]

But it looks like it's not ANY binary content causes splash:go to fail, will try to narrow it down.

[kmike]

Splash doesn't handle unsupported content now (http://doc.qt.io/archives/qt-5.5/qwebpage.html#forwardUnsupportedContent-prop), to fix it we need to add an API for that to Splash

[lopuhin]

The link was extracted from <a href="URL" id="ctl00_MasterMain_Hot_rpHot_ctl10_navImg" onclick="return hs.expand(this, {captionId: \'caption1\'})"> element, so all is correct (I don't think we should drop links with onclick if we don't click on them).