Is there a way to detect if a website is using SPDY?

Question

Is there a way to detect if a website is communicating with Chrome using SPDY?

You can use http://spdycheck.org to check SPDY support. – fmalina Oct 12 '13 at 11:49 — fmalina, Oct 12 '13 at 11:49

Jesse Dhillon · Answer 1 · 2012-02-25T08:51:17.170

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You can view your active SPDY sessions in a current build of Chrome by pulling up:

chrome://net-internals/#spdy

edited Feb 25 '12 at 08:51

answered Apr 22 '11 at 07:23

Jesse Dhillon

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Is there something similar to this for Firefox (without using an extension)? – Geremia Apr 04 '16 at 04:24

score 26 · Answer 2 · answered Jan 27 '11 at 15:51

Mike Belshe said

Yes, indeed SPDY is enabled in Chrome and on Google servers for all SSL traffic at this point. (Actually, we do 90% on SPDY, with a 10% holdback for purposes of A/B comparisons).

http://groups.google.com/group/spdy-dev/browse_thread/thread/4c2396ecbc36b1c4

igrigorik · Answer 3 · 2012-06-30T16:52:58.667

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chrome://net-internals/#spdy to see active SPDY sessions

Google services run over SPDY (search, gmail, etc)
F5 announced SPDY support on their appliances at Interop 2012
Akamai announced technical preview for SPDY at Velocity 2012 (June 2012)
Cloudflare announced SPDY beta for their customers (June 2012)
As of early March 2012, twitter.com is running SPDY
There are a few specialized CDN's which have SPDY enabled
Nginx supports SPDY (draft 2)
Apache has a great mod_spdy module

edited Jun 30 '12 at 16:52

answered Mar 24 '12 at 17:23

igrigorik

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Opera Turbo uses SPDY as well. – niutech Sep 20 '13 at 19:54

score 10 · Answer 4 · answered Apr 04 '14 at 11:34

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On a couple of SPDY sites I checked, there appear to be these additional request headers that don't appear on standard HTTPS requests. That might indicate the use of SPDY without requiring a browser extension.

:host:     yump.com.au
:method:   GET
:path:     /
:scheme:   https
:version:  HTTP/1.1

enter image description here

You'll also notice that all the request and response header variables are in lowercase (is that part of the SPDY protocol?).

answered Apr 04 '14 at 11:34

Simon East

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You are ABSOLUTELY right. The spdy protocol draft 3.1 (link below) even talks about this in section 5.2. Thx for noticing this. I was going crazy trying figure this out. I need to do this because i want to use a performance testing tool (such as jmeter or loadrunner) instead of a browser to access a SPDY enabled server. https://sites.google.com/a/chromium.org/dev/spdy/spdy-protocol/spdy-protocol-draft3-1 – zango123 Jun 09 '14 at 11:26

score 7 · Answer 5 · answered Oct 08 '12 at 02:53

46.5% of browser traffic now supports SPDY (see http://caniuse.com/spdy ), so almost half the users that hit google, twitter or other SPDY enabled websites are already using SPDY.

If you want to get similar gains for your website, then use jetty (7, 8, and 9 all have SPDY support).

score 4 · Answer 6 · answered Apr 10 '12 at 00:53

4

Chrome has a plugin to show you which sites are SPDY enabled. http://www.devthought.com/2012/03/10/chrome-spdy-indicator/

answered Apr 10 '12 at 00:53

FlappySocks

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There is a similar plugin for firefox too: https://addons.mozilla.org/en-us/firefox/addon/spdy-indicator/ – neutrinus Nov 29 '12 at 11:43

score 2 · Answer 7 · answered Jun 22 '12 at 10:04

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Jetty Servlet engine also got decent spdy support. It's completely transparent for the web developer and just needs to be enabled on the server config:

http://wiki.eclipse.org/Jetty/Feature/SPDY

answered Jun 22 '12 at 10:04

Thomas Becker

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Matthew Felgate · Answer 8 · 2013-11-05T16:40:03.577

The website http://spdycheck.org/ checks if SPDY is enabled on a website.
The Google Chrome extension will tell you with a green icon in the url bar. (https://chrome.google.com/webstore/detail/spdy-indicator/mpbpobfflnpcgagjijhmgnchggcjblin?hl=en)
There is also website https://isspdyenabled.com/ to tell you if your browser is supporting SPDY
You can use Chrome Flags to see more details information visit chrome://net-internals/#spdy in chrome

SPDY is enabled by lots of the major websites: Google, Twitter, Facebook etc

With IE11 supporting SPDY the future looks SPDY... :-D

score 1 · Answer 9 · answered Oct 22 '12 at 18:28

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From the major sites, SPDY is served on all Google products, Twitter, Wordpress.com, TechCrunch.

answered Oct 22 '12 at 18:28

Yehia

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score 0 · Answer 10 · answered May 24 '16 at 03:02

Try WAPPALYZER,

They provide addon for both Mozilla & chrome browser. It can identify everything about any website like, server technology, server scripting language, client side scripting language, site using plugins & all major things from most of the websites.

https://wappalyzer.com/download

score 0 · Answer 11 · answered Dec 02 '11 at 21:15

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Amazon Kindle Fire may be using SPDY for HTTP traffic through their Silk proxy. This is based on Amazon's public job posting: http://aws.amazon.com/amazonsilk-jobs/ and is not verified or confirmed elsewhere.

answered Dec 02 '11 at 21:15

Frank

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score 0 · Answer 12 · answered Mar 20 '12 at 06:01

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You can enable network.http.spdy.enabled in Firefox 11's about:config and add this extension: https://addons.mozilla.org/en-US/firefox/addon/spdy-indicator/

answered Mar 20 '12 at 06:01

Lubomir Rintel

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Roman · Answer 13 · 2014-06-17T06:59:11.510

I doubt that it's used, as the current Chrome/Chromium only supports SPDY detection using the SSL NPN extension, which was only recently added to the edge openssl. And the Alternate-Protocol which is not npn is not supported. http://www.chromium.org/spdy/spdy-protocol/spdy-protocol-draft2#TOC-Server-Advertisement-of-SPDY-throug

Update: While this answer was correct in 2010, when it was written, in 2014 it's quite a different story.

alcuadrado · Answer 14 · 2015-01-19T00:59:40.077

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Just sniff the TCP/IP packagees from and to the webserver, and check where they are SPDY packages or just HTTP.

edited Jan 19 '15 at 00:59

answered Oct 31 '10 at 22:01

alcuadrado

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As Google is author of SPDY and Chrome was first browser implementing SPDY on client I have to down vote your answer. – korCZis Jan 17 '15 at 00:06
This is a 4 year old answer. I'll update it. But I'm not sure if downvoting is the right way to make the answer's author update it. – alcuadrado Jan 19 '15 at 00:59

Is there a way to detect if a website is using SPDY?

14 Answers14