[Zope] Editing the z2.py File

[Ben Ocean]

Hi;
I have my own server with virtual hosts. I'm going to build a large Web site
on this server with Zope as the base platform. I intend to build more on the
Zope platform, but already have several sites built without it. My question
is, how do I edit the z2.py file in such a way that I can call up certain
virtual hosts and not others through port 80? Also, can I build the
equivalent of a doc root off of the Zope root such that Zope could act, in
effect, as a virtual host, or do I need to create a separate instance of
Zope for each domain?
TIA,
BenO


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Re: [Zope] Editing the z2.py File

[Stephane Bortzmeyer]

On Thursday 21 December 2000, at 14 h 59, the keyboard of "Ben Ocean" 
<[EMAIL PROTECTED]> wrote:

> I have my own server with virtual hosts. I'm going to build a large Web site
> on this server with Zope as the base platform. I intend to build more on the
> Zope platform, but already have several sites built without it. My question
> is, how do I edit the z2.py file in such a way that I can call up certain
> virtual hosts and not others through port 80? 

I use Squid as an accelerator for my Zope sites . Squid can bind itself to an IP address (http_port in recent 
Squids, tcp_incoming_addr or something like that in older Squids). Use an 
other IP address for Apache sites (BindAddress in Apache).

> Also, can I build the
> equivalent of a doc root off of the Zope root such that Zope could act, in
> effect, as a virtual host, 

It is possible with SiteAccess' "Set Access Rule". It has some nasty side-effects:
- Zcatalogs will no longer work :-(
- do not make *one* mistake in the "root" method code or you will lose access to your 
Zope completely (that's the big problem with all-database systems like Zope). Even FTP 
access will fail, you will have to retrieve your ZODB from backups!



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Re: [Zope] Editing the z2.py File

[Martijn Pieters]

On Fri, Dec 22, 2000 at 09:42:35AM +0100, Stephane Bortzmeyer wrote:
> It is possible with SiteAccess' "Set Access Rule". It has some nasty side-effects:
> - Zcatalogs will no longer work :-(

This is fixed by CHris Petrilli's patches, see elsewhere on the list (or
Zope-Dev, can't remember). These fixes will be in Zope 2.3.0.

> - do not make *one* mistake in the "root" method code or you will lose
> access to your Zope completely (that's the big problem with all-database
> systems like Zope). Even FTP access will fail, you will have to retrieve
> your ZODB from backups!

This is nonsense. There are several ways of telling the SiteAccess rule
not to kick in. See the SiteAccess pages for more info on the URL
modifiers and environment variables that do this.

-- 
Martijn Pieters
| Software Engineer  mailto:[EMAIL PROTECTED]
| Digital Creations  http://www.digicool.com/
| Creators of Zope   http://www.zope.org/
-

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Re: [Zope] Editing the z2.py File

[Stephane Bortzmeyer]

On Friday 22 December 2000, at 10 h 38, the keyboard of Martijn Pieters 
<[EMAIL PROTECTED]> wrote:

> There are several ways of telling the SiteAccess rule
> not to kick in. See the SiteAccess pages for more info on the URL
> modifiers and environment variables that do this.

When I had the problem and was in an emergency, I did not find it. Now that 
I'm cooler, I find it at a glance :-}

If an Access Rule is broken, and is preventing normal access, it can be 
disabled by
restarting Zope with environment variable SUPPRESS_ACCESSRULE set.

Thanks.



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Re: [Zope] Editing the z2.py File

[Michael Bernstein]

Stephane Bortzmeyer wrote:
> 
> - do not make *one* mistake in the "root" method code or you will lose access to 
>your Zope completely (that's the big problem with all-database systems like Zope). 
>Even FTP access will fail, you will have to retrieve your ZODB from backups!

Umm, even if *everything* else fails, you can still manually
truncate the Data.fs file to remove the last transaction
(presumably the change you made to the access rule), and
you'll be back to normal.

That's one of the things that I really appreciate about
Zope, that it's practically (though not absolutely) immune
to unrecoverable data corruption.

HTH,

Michael Bernstein.

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Re: [Zope] Editing the z2.py File

[Stephane Bortzmeyer]

On Friday 22 December 2000, at 18 h 56, the keyboard of Michael Bernstein 
<[EMAIL PROTECTED]> wrote:

> Umm, even if *everything* else fails, you can still manually
> truncate the Data.fs file to remove the last transaction

Well, this file is not human-readable so I do not really see how to truncate it 
properly?



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Re: [Zope] Editing the z2.py File

[Paul Browning]

--On 02 January 2001 17:23 +0100 Stephane Bortzmeyer 
<[EMAIL PROTECTED]> wrote:

> On Friday 22 December 2000, at 18 h 56, the keyboard of Michael Bernstein
> <[EMAIL PROTECTED]> wrote:
>
>> Umm, even if *everything* else fails, you can still manually
>> truncate the Data.fs file to remove the last transaction
>
> Well, this file is not human-readable so I do not really see how to
> truncate it properly?

See http://www.zope.org/Members/itamar/CorruptedZODB
for how to do this.

Paul

--
 The Library, Tyndall Avenue, Univ. of Bristol, Bristol, BS8 1TJ, UK
 E-mail: [EMAIL PROTECTED]  URL: http://www.bris.ac.uk/


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