From: ahoward <ahoward@...>
Date: 2003-03-09T18:40:35+09:00
Subject: Re: DRB and threads

On Sun, 9 Mar 2003, Brian Candler wrote:

> 'require fcgi.rb' pulls in the C version if you have it, otherwise it loads
> the Ruby version.

doesn't this always require 'fcgi.rb'?  i mean, isn't only

  require 'fcgi'

allowed to chose the *.so over the *.rb?

> If there are going to be two versions then they really should be made as
> similiar in behaviour as possible of course. The only reason I haven't
> tested the Ruby version yet is that I've been too lazy to install stringio
> :-)

i don't know the history of this, but it certainly seems like a GC'd language
would be a much better choice to write fastcgi servers in...


> > > * the trapping of TERM and HUP doesn't work properly for me. What happens is
> > > that if I send such a signal to the process, nothing happens (ps shows the
> > > same pid) until the next HTTP request comes along, at which point it fails
> > > and Apache returns '500 Internal Server Error'. The process is then
> > > restarted and it's fine thereafter.

i checked this out a little using strace - looks like accept (or calls before
accept) are catching everything so there's not much to be done :

[howardat@dhcppc1 fcgi-bin]# strace -p 10511
accept(0, 0xbfffe1ac, [112]) = ? ERESTARTSYS (To be restarted)
--- SIGUSR2 (User defined signal 2) ---
sigreturn()                             = ? (mask now [])
accept(0,

same goes for HUP, USR1, etc.

> Yep, I tried both combinations.
>
> - with install_traps: I get the hanging behaviour as described above
>
> - with install_traps commented out: the process dies immediately on
>   receipt of TERM or HUP as expected (although if it were in the middle of
>   processing a request, it would bomb out without tidying up rather than
>   finish the request)

i think sending SIGHUP and having one request fail is about a good as it gets
;-(

i'm not sure what the alternative would be...

> FYI I am currently working on adding FCGI server support to druby (there is
> already a HTTP client in samples/http0.rb). Will let you know if I get it to
> work!

to what end?  i mean, what would be the point of having a distributed fastcgi
process?  not that there isn't a point, i'm just wondering what you're on
about?

one thing which really needs addressed with fcgi is a way to run from a tty so
you can enter params and see the html (or error messages) come blasting back
out... not being able to do this is a real pain when debugging.

-a



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