[Web-SIG] Rack: WSGI on Ruby

[Phillip J. Eby]

http://rack.rubyforge.org/

Interestingly, they take the approach we're talking about for WSGI 2.0, as 
far as a call signature taking one argument and returning three.

The spec is brief and to the point, in part because of that simplicity, but 
also because they're ignoring HTTP 1.1 and issues like our read() problems 
with the input stream.  They're also ignoring flow control, push, 
asynchronous servers, etc.

Actually, the whole thing seems pretty underspecified, but then they have 
some advantages we didn't.  At the time WSGI was created, depending on an 
external library like wsgiref that wasn't in the stdlib was an almost 
unheard-of luxury.  Anyway, the fact that they can define the thing in 
terms of a canonical implementation, *and* don't have to worry as much 
about backward compatibility with a wide variety of web frameworks, means 
that they can probably actually get away with it.