- From: Mounir Lamouri <mounir@lamouri.fr>
- Date: Mon, 21 May 2012 20:37:18 +0200
- To: whatwg@lists.whatwg.org
On 05/21/2012 04:34 PM, Boris Zbarsky wrote: > On 5/21/12 10:09 AM, Mounir Lamouri wrote: >> On 05/20/2012 03:04 PM, Boris Zbarsky wrote: >>> On 5/20/12 5:45 AM, Paul Irish wrote: >>>> Since no one mentioned it, I just wanted to make sure this thread is >>>> aware >>>> of the Network Information API [1], which provides >>>> navigator.connection.bandwidth >>>> >>>> It's been recently implemented (to some degree) in both Mozilla [2] and >>>> Webkit [3]. >>> >>> As far as I can tell, the Mozilla implementation always returns Infinity >>> for .bandwidth. >> >> This is not true. There is an implementation for Firefox Android which >> is based on the connection type. > > Ah, indeed. I had missed that codepath. > > If I'm reading the right code now, that looks like it returns a constant > value for each connection type (e.g. if you're connected via Ethernet or > Wifi it returns 20; if you're connected via EDGE it returns 0.2, etc). The idea is that the specification allows the implementation to be trivial and improve without changing the specification. And that implementation is good enough for web pages to know if the user is in a slow or fast connection without giving the connection type and leaking information. That would require not returning exact constant by blurring them a bit. This is not done yet but could easily happen. -- Mounir
Received on Monday, 21 May 2012 18:38:06 UTC