[Python-Dev] the new 2.3a1 settimeout() with httplib and SSL

[Geoffrey Talvola]

Ben Laurie [mailto:ben@algroup.co.uk] wrote:
> Guido van Rossum wrote:
> > Hm, from that page it looks like the internal implementation may
> > actually repeatedly read from the socket, until it has processed a
> > full 16K block.  But I may be mistaken, since it also refers to a
> > non-blocking underlying "BIO", whatever that is. :-(
> 
> BIO is OpenSSL's I/O abstraction - if you have a nonblocking 
> one, then 
> SSL_read() will return when a read returns nothing, and if you want 
> SSL_read() to not block, then you pretty much have to use a 
> non-blocking 
> BIO (because even if select() says there's data, there may 
> not be enough 
> to actually return any via SSL_read()).

That's OK, I think, because what we care about with timeouts is detecting
when there is _no_ activity on the socket for more than N seconds, and
select() does detect that situation properly.

> I can help out here if there's still a problem.

If you'd like, you could quickly review the latest checkin here -- I have no
prior experience with OpenSSL so that might be prudent:

http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/python/python/dist/src/Module
s/_ssl.c

But it seems to work fine.

- Geoff