Amphtml: Document Preconnect Polyfill

Created on 25 Sep 2017 · 8Comments · Source: ampproject/amphtml

What's the issue?

https://stackoverflow.com/questions/38339156/can-amp-errors-containing-the-string-do-not-worry-about-it-be-ignored/38346568

How do we reproduce the issue?

In Mobile Safari AMP pages that include <iframe>s appear to be making network requests to the follow path "/amp_preconnect_polyfill_404_or_other_error_expected._Do_not_worry_about_it". This can be observed by monitoring network traffic on the device. It will also show with great frequency in the network logs of servers delivering the <iframe>d experience.

This preconnect polyfill is not documented (except for a few Stack Overflow questions) and may come as a surprise to those hosting an <iframe>d experience on an AMP page. The "_Do_not_worry_about_it" portion of the path does not allay any suspicions and does not provide any additional information about the feature.

This feature should be documented in AMP with enough detail for developers to understand and anticipate this behavior. I would also suggest that the preconnect URL reference the documentation so the documentation is more discoverable when someone does observer the URL pattern.

What browsers are affected?

Observed in Mobile Safari.

Which AMP version is affected?

1506041909031

When Possible Documentation Stale

Source

mattrohland

👍2

Most helpful comment

Any way to disable this ? its filling our logs with 404s.

ApeNox on 10 Mar 2018

👍4

All 8 comments

/to @bpaduch I know validator has a "errors" doc for errors and their meanings, we may wanna start one for AMP JS too.

aghassemi on 25 Sep 2017

Hi, has this issue been resolved? I would like to help :)

Bubblemelon on 23 Oct 2017

@Bubblemelon - It hasn't been resolved. Before creating the document for "AMP JS errors", there'd be some investigation needed to determine if there are other AMP JS errors we should document as well.

bpaduch on 24 Oct 2017

this creates a huge number of 404 on the webserver logs, is this really necessary?

htrex on 5 Mar 2018

👍1

@aghassemi - see comment above.

bpaduch on 5 Mar 2018

Any way to disable this ? its filling our logs with 404s.

ApeNox on 10 Mar 2018

👍4

@nainar are you able to provide any insight on this issue? Is this still happening? I'm unsure where it would be documented.

CrystalOnScript on 6 Aug 2019

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.