Http/3 in Chrome 90

user3011 · April 18, 2021, 8:47am

Hi,

Chrome enabled http/3 bydefault. I thought give it a try on latest chrome 90 (Mac). I find sometime click on a link doesn’t respond or respond very slowly. Do you find such issue?

fritex · April 18, 2021, 8:04pm

Can you check the developer console?
Any errors appear?

I saw similar behaviour on Mozilla Firefox Developer edition back few months ago when it was still “experimental”, and not yet available in “Beta/Nightly” edition as it currently is stated by the article below too as Chrome 90 has it:

I have to admit I haven’t tried and test later with HTTP/3 thing “enabled” in my Web browsers.

HTTP/2 is just enough for me and most users by now.

EDIT: That was a year ago when I tested it with my site and Revive AdServer, the errors popped-up in the console when I have had HTTP/3 enabled (while the Website is behind Cloudflare and HTTP/3 enabled with 0-RTT too), see the issue on the below article:

github.com/revive-adserver/revive-adserver

HTTP3 - Ads not showing up with <ins> using Asyncjs.php code? | Revive v4.1.4

opened 05:26PM - 07 Jan 20 UTC

closed 10:53PM - 18 Feb 20 UTC

fritexvz

Feedback Required

**CLIENT INFORMATION:** OS: Windows 8.1 Pro Web browser: FireFox Developer 73.…0b1 - 64bit - hr-hr (Croatian) **WEBSITE INFORMATION:** Domain: www.racunalo.com Revive Adserver (OpenX) v4.1.4 - openx.racunalo.com - CSP policy, HSTS, X-headers ... **STATUS:** Installed and running on a sub-domain openx.example.com and serving ads on example.com. **Nginx version:** 1.17.7 **PHP version:** 7.2.26-1+020191218.33+debian9~1.gbpb5a34b **MySQL version:** 5.7.28 - MySQL Community Server (GPL) **CloudFlare** - using HTTP/2 and HTTP/3 with QUIC and 0-RTT is "enabled" on the CloudFlare dashboard - CDN and features like rocketloader.js are enabled - HTTPS enabled - TLS enabled **Problem description / Issue / Reproduce the problem:** When wanting to try out HTTP3, went to "about:config" and changed settings "network.http.http3.enabled" to "true". Restart the Web browser. Visiting the page with Revive Adserver/OpenX, I got "white boxes" where ads should be loaded, but instead they where not showing up. I went to look up in the browser console, and there were errors: `SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data (1:1282)` **PICTURE:** https://ibb.co/DwWsdfc **The code for showing the ads** For each zone: `<ins data-revive-zoneid="ZONE_ID" data-revive-id="UNIQUE_ID"></ins>` Written once in the footer, before closing </body> tag: `<script async="async" src="//openx.example.com/www/delivery/asyncjs.php" type="text/javascript"></script>` **WORKING EXAMPLE - ajs.php** The JavaScript code for showing up ads with ajs.php - is working on the same settings with HTTP3 enabled in Web browser: example - https://openx.example.com/www/delivery/ajs.php - working To sumarize and conclude all, Async display of the ads on HTTP3 is not working, while standard JavaScript code works. Any ideas? Thank you!

freitasm · April 18, 2021, 10:38pm

Are you sure it’s http/3 by default? I am pretty sure it is HTTPS by default with HTTP fallback. This means a small lag when clicking through a server that doesn’t have HTTPS support.

user3011 · April 19, 2021, 2:44am

No error in developer console.

I m sure it is showing as h3-29 in network tab in developer tools.

HTTPS at server (origin) and at Cloudflare with TLS 1.3 (0-rtt)

user3011 · April 20, 2021, 12:03pm

any other suggestion?

user3011 · April 22, 2021, 3:21pm

why rocketloader javascript only load using http/2. It never load on http/3.

system · April 27, 2021, 3:22pm

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