Re: How to add new "protocols" ?

On Tue, 18 Feb 1997 touch@ISI.EDU wrote:

[ These techniques for migrating http to non backwards compatible 
protocols, which may clear up some of the other points]


> > 	1) try  alternate protocol, and use it if it works. Cache result
> > 	   of test. 
> Increases the connection latency. Bad in general. Besides, 
> which protocol do you try?

Adds an extra RTT to first connection to host

[DNS] 
  the url format is assumed to be http://whatever/; old 
browsers need to be able to access the url when interpreting it as such; 

> > 	3) Use Upgrade: header
> Two connections are better than one?

upgrade changes the protocol to be used on the same connection
> > 	4) Use invalid method to probe. 
> Same?

same :-)

BTW, the technique I forgot was using the first part of the hostname to 
indicate a special protocol switch; failover is to fall back to http; 
there must be a suitable CNAME pointing to the right place for straight
http.


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