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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hi,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I pretty much agree with what Bernard and Johathan Rosenberg
have said.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>There are just a couple of issues I would like to understand
better:<o:p></o:p></span></p>
<p class=MsoListParagraph style='margin-left:54.0pt;text-indent:-18.0pt;
mso-list:l1 level1 lfo2'><![if !supportLists]><span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'><span style='mso-list:Ignore'>-<span
style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I suppose these Javascript libraries can be cached on the
browser and need not be downloaded every time the application/site is accessed?
(These are probably a common practices in Javascript and Browsers but are good
to clarify in this discussion.)<o:p></o:p></span></p>
<p class=MsoListParagraph style='margin-left:54.0pt;text-indent:-18.0pt;
mso-list:l1 level1 lfo2'><![if !supportLists]><span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'><span style='mso-list:Ignore'>-<span
style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>It may be easy for a web developer to use the client side
Javascript library, but I believe the challenge may be bigger on the server
side, where scalability etc. become issues. How about the server side, is there
something ready-made for that? I suppose the Javascript on the browser can’t
necessarily connect to vanilla SIP or XMPP servers but some HTTP/WebSocket/TLS
tunneling and connection management magic is needed, especially when dealing
with HTTP intermediaries. (But presumably the same issues would be faced if we “picked”
SIP or XMPP.)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Markus<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
rtc-web-bounces@alvestrand.no [mailto:rtc-web-bounces@alvestrand.no] <b>On
Behalf Of </b>ext Bernard Aboba<br>
<b>Sent:</b> 30 January, 2011 07:35<br>
<b>To:</b> Richard Shockey; erik@hookflash.com; jonathan.rosenberg@skype.net<br>
<b>Cc:</b> rtc-web@alvestrand.no; dispatch@ietf.org<br>
<b>Subject:</b> Re: [RTW] [dispatch] Does RTC-WEB need to pick a signaling
protocol?<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'>> Duh ... what are we abandoning 10 years
of work?<br>
<br>
The web is a "generative" platform that supports not just protocols,
but also execution of code. This enables the platform to be
extended in a virtually infinite number of ways, including the development of
Javascript signaling APIs, without needing to add yet more core code to the
browser. This is the preferred approach unless it can be shown that
something *absolutely* must be natively supported (as was discussed at the
workshop, STUN/TURN authorization for peer-to-peer media is probably an example
of something that *does* need to be native). <br>
<br>
As an example of what is possible, there is an excellent Javascript library for
XMPP (strophe, see http://code.stanziq.com/strophe/). Poking
around, it would appear that there are a number of Javascript libraries that
claim to provide support for SIP (such as http://phono.com/), although I have
no idea of their usefulness. <br>
<br>
Given the generality and power of the web platform and the ease with which
sophisticated signaling libraries can be implemented today, the bar for getting
additional code into any browser is going to be quite high. If you doubt
this, ask the build-master of your favorite browser for the requirements
for checkin of a complete SIP stack :) <o:p></o:p></span></p>
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