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Re: Traditional RPC

• To: Paul Prescod <paul@p...>, xml-dev@l...
• Subject: Re: Traditional RPC
• From: Alaric Snell <alaric@a...>
• Date: Mon, 18 Feb 2002 09:21:55 +0000
• In-reply-to: <3C704973.14090ADF@p...>
• References: <F0XRRNVP2YVP1XSOMZWZXYXA6FD5YVS.3c7025d1@MChamp> <06c901c1b809$155ac050$33a1dc40@murphy> <3C704973.14090ADF@p...>

On Monday 18 February 2002 12:23 am, Paul Prescod wrote:
> Dave Winer wrote:
> > BTW, last time I checked HTTP was synchronous.
> >
> > Maybe I missed something.
>
> What do you mean by synchronous? Is SMTP asynchronous? If so, so is
> HTTP:
>
>  * http://www.prescod.net/asynchhttp.html

In which case, it's just as asynchronous as anything on this Earth. What's a 
synchronous protocol, by this definition? CORBA isn't, and neither is ONC RPC 
:-)

I'd say that SMTP is asynchronous since the only responses allowed in an SMTP 
sending session are immediate handling of certain errors. To actual perform 
an entire transaction, a message is sent and a reply received - which occur 
in *seperate* SMTP sessions.

In HTTP, you send a request and get back a response in the *same* HTTP 
session. That's the synchronicity. Of course you can define the request to 
contain a reply address and the response to contain a simple 'received' or 
'not received' and make it asynchronous. But it's not intrinsically so; 
unless you make that extra effort, it'll be synchronous.

ABS

-- 
                               Alaric B. Snell
 http://www.alaric-snell.com/  http://RFC.net/  http://www.warhead.org.uk/
   Any sufficiently advanced technology can be emulated in software  

• References:
  • Re: Traditional RPC
    • From: Mike Champion <mc@x...>
  • Re: Traditional RPC
    • From: "Dave Winer" <dave@u...>
  • Re: Traditional RPC
    • From: Paul Prescod <paul@p...>

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