Re: [Zope-dev] ProxyPass and SiteAccess getting REMOTE_ADDR
William Noon wrote: Last week I was setting up an Apache VirtualHost to point to a Zope object tree using the ProxyPass directive and SiteAccess to get all the urls right (great stuff!). However, I noticed that the REMOTE_ADDR was always set to the proxy host. This makes sense because Zope just gets the host/port from the socket connection. But I needed the real remote_addr for logging and user admin. Adding 'Header's wouldn't pass the info to Zope. The Zope mail archives mentioned the problem a couple of times without a configuration fix. A simple fix to the proxy module (in proxy_http.c) will create a new header called 'Original-Addr' to contain the client's ip address. Also, take a look at mod_proxy_add_forward for Apache, and these other resources: http://www.zope.org/Members/stephen/ApacheProxyPatch http://modules.apache.org/search?id=124 ftp://ftp.netcetera.dk/pub/apache/mod_proxy_add_forward.c I believe there is some code in mod_proxy_add_forward to deal with getting the client's IP address from chains of proxies. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] ProxyPass and SiteAccess getting REMOTE_ADDR
On Mon, 12 Feb 2001, William Noon wrote: A simple fix to the proxy module (in proxy_http.c) will create a new header called 'Original-Addr' to contain the client's ip address. Here is a context diff against Apache 1.3.14 that should work even in the new 2.0 servers: FYI, there is an apache module that already does this. I can't remember the name offhand, but it creates a similar header called something like X-Original-Addr. The module works in two parts and is both 'client' and 'server', so that if you have two apache processes one prxying to the other, the first will generate the header, and the second will recognise it and set the appropriate variables. -Matt -- Matt Hamilton [EMAIL PROTECTED] Netsight Internet Solutions, Ltd. Business Vision on the Internet http://www.netsight.co.uk +44 (0)117 9090901 Web Hosting | Web Design | Domain Names | Co-location | DB Integration ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] manage_ methods
Dieter Maurer wrote: "manage_" methods are mapped to permissions (as are any other methods). You can decide which roles have which permissions. What does the 'View management screens' permission protect? cheers, Chris ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] ProxyPass and SiteAccess getting REMOTE_ADDR
Steve Alexander wrote: Also, take a look at mod_proxy_add_forward for Apache, and these other resources: http://www.zope.org/Members/stephen/ApacheProxyPatch http://modules.apache.org/search?id=124 ftp://ftp.netcetera.dk/pub/apache/mod_proxy_add_forward.c I believe there is some code in mod_proxy_add_forward to deal with getting the client's IP address from chains of proxies. We're actually phasing this hack out in favour of a Virtual Host Monster which seems like a much cleaner solution... cheers, Chris ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Virtual Host Monster Paranoia
Right, I really like the idea of these things but I am concerned about something that allows anonymous users to futz with traversal. Can someone put my fears to rest that using these won't let anonymous users do bad things to my sites? cheers, Chris ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Virtual Host Monster Paranoia
On Tue, 13 Feb 2001, Chris Withers wrote: Right, I really like the idea of these things but I am concerned about something that allows anonymous users to futz with traversal. Can someone put my fears to rest that using these won't let anonymous users do bad things to my sites? I use them in conjunction with Apache's mod_proxy to rewrite http://www.simpledomain.com to the long http://zopehost.foo.com/blah/blah/VirtualHostMonstser/blah/blah. The Zope host is behind a firewall, so anonymouse users cannot get to it directly. -Matt -- Matt Hamilton [EMAIL PROTECTED] Netsight Internet Solutions, Ltd. Business Vision on the Internet http://www.netsight.co.uk +44 (0)117 9090901 Web Hosting | Web Design | Domain Names | Co-location | DB Integration ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Virtual Host Monster Paranoia
On Tue, 13 Feb 2001 10:24:54 +, Chris Withers [EMAIL PROTECTED] wrote: I really like the idea of these things but I am concerned about something that allows anonymous users to futz with traversal. Can someone put my fears to rest that using these won't let anonymous users do bad things to my sites? I didnt realize V-H-M was coming in 2.3.0, and developed an alternative that fills a similar niche: http://www.zope.org/Members/htrd/howto/host-server This option has fewer 'moving parts' than anything based on SiteAccess (which I still feel uncomfortable with, sorry evan) Toby Dickenson [EMAIL PROTECTED] ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Virtual Host Monster Paranoia
On Tue, 13 Feb 2001 10:30:26 + (GMT), Matt Hamilton [EMAIL PROTECTED] wrote: I use them in conjunction with Apache's mod_proxy to rewrite http://www.simpledomain.com to the long http://zopehost.foo.com/blah/blah/VirtualHostMonstser/blah/blah. The Zope host is behind a firewall, so anonymouse users cannot get to it directly. No, but they can get to: http://www.simpledomain.com/blah/VirtualHost/bad.stuff/blah which gets rewritten to: http://zopehost.foo.com/VirtualHost/http/www.simpledomain/blah/VirtualHost/bad.stuff/blah Understanding its behaviour behaviour might be beyond the complexity threshold for a paranoid admin to be comfortable. Toby Dickenson [EMAIL PROTECTED] ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Windows registry?
On 12 Feb 2001, 23:04 Chris Maresca wrote: If I recall correctly, there is a tool for doing this call srvany, part of the resource kit. I use srvany for running some background services written in Python on some of my servers. It works so far, but not as reliable as I'd like - especially stopping/restarting a service often fails, which is a PITA. Mine installed as a service on w2k by default... This doesn't use svrany.exe, but pythonservice.exe, which is part of the win32 extensions written by Mark Hammond, now with ActiveState. "Python programming on Win32" by Mark Hammond and Andy Robinson contains some documentation on how to use pythonservice.exe. The Windows version of Zope makes use of this driver program, when installing Zope as a service. The relevant logic for running Zope as a Windows service is contained in Zserver/ZService.py. I intend to switch from svrany to using pythonservice.exe for the aforementioned reason. That's almost all I know about this specific topic at this time; I'd suggest that Andy McKay might ask his colleague Mark about pythonservice.exe, instead of doing guesswork :-) Chris. On Mon, 12 Feb 2001, Andy McKay wrote: Anyone tried or got a script to create / delete the windows registry settings for running a zope server as a service. It would make my life a lot easier... If no-one has I could recreate them from observation. -- o ( [EMAIL PROTECTED] (+49 2241) 14-2394 /\* GMD mbH #include _`\ `_=== Schloss Birlinghoven, std.disclaimer __(_)/_(_)___.-._ 53754 Sankt Augustin, Germany ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
RE: [Zope-dev] Virtual Host Monster Paranoia
Then again, there's the advantage of having something included as a standard part of Zope. Yes, thats true. I would like to see this being rolled into the standard zope (and there is a Collector entry saying that), although I think its unlikely given the 'competition' from VHM. Having said that, a big patch is worse than a small patch. And http://www.zope.org/Members/htrd/howto/host-server is a really tiny patch ;-) ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Virtual Host Monster Paranoia
From: "Chris Withers" [EMAIL PROTECTED] Well, it's easy enough to find out if a site is running Zope, then this becomes pretty easy attack to think of I'm not going to claim that this is perfectly harmless, but I can't think of any way in which this could be termed an "attack". You can already provide any traversal path you like in the URL; All VHM adds is the ability to manipulate generated URLs, and in fairly crude ways. These URLs come back to your browser in a page, where they have no more potential for harm than if you'd assembled them by hand. The only scenario I can imagine where this could even affect the operation of a site is one where the site uses URLs internally in some fashion. This is part of the reason that Zope has shifted from using URLs to paths when addressing objects, since paths are unaffected by URL manipulation. Cheers, Evan @ digicool 4-am ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Calling Python Scripts from Python Products
Hi, I was to call a Python Script from within a Python product and I'm wondering what to call it with so that context, container, script, namespace and subpath all get bound to the right things? cheers, Chris ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Strange AttributeError in AccessControl/User.py
Morten W. Petersen wrote: Hi guys, indeed a strange problem, anyone experienced this? Zope Error Zope has encountered an error while publishing this resource. AttributeError Sorry, a Zope error occurred. Traceback (innermost last): File /home/morten/Zope/lib/python/ZPublisher/Publish.py, line 222, in publish_module File /home/morten/Zope/lib/python/ZPublisher/Publish.py, line 187, in publish File /home/morten/Zope/lib/python/Zope/__init__.py, line 221, in zpublisher_exception_hook (Object: CatalogAware) File /home/morten/Zope/lib/python/ZPublisher/Publish.py, line 162, in publish File /home/morten/Zope/lib/python/ZPublisher/BaseRequest.py, line 442, in traverse File /home/morten/Zope/lib/python/AccessControl/User.py, line 496, in validate (Object: RoleManager) File /home/morten/Zope/lib/python/AccessControl/User.py, line 231, in allowed AttributeError: aq_inContextOf What version of Zope are you using? On my Zope 2.3 fom CVS, the line of User.py that could conveivably cause that error is 20 line on at 251. Perhaps you're hitting a but that's been fixed in a later version of Zope, or in CVS for the next version? -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] ProxyPass and SiteAccess getting REMOTE_ADDR
From: "Chris Withers" [EMAIL PROTECTED] We're actually phasing this hack out in favour of a Virtual Host Monster which seems like a much cleaner solution... Sorry, Chris, VHM is irrelevent to this problem. If you want to know the original remote IP, you have two choices: 1. Use one of the Apache patches that have been posted. 2. Mangle it into URLs and extract it with an AccessRule. Neither one of these is really satisfactory at the moment, since medusa doesn't know either solution, and so z2.log doesn't get the proper IP addresses. I'm hoping that one of these days we can standardize on #1 and provide support in medusa. I don't get why it is necessary at all to use medusa's logging when using apache or squid etc. as a proxy. I for instance use apache to also serve content which isn't contained in the ZODB (large files etc.), and I want the logs/statistics to also contain information about these. Btw. with a small module it's even possible to log the usernames with apache, something medusa isn't capabable of afaik (as of zope version 2.3). cheers, oliver ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Strange AttributeError in AccessControl/User.py
[Morten W. Petersen] | indeed a strange problem, anyone experienced this? What did you do to make this happen? Versions? ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: ThreadSafeCounter
[Morten W. Petersen] | The ideal solution would be to use an object that lives in the ZODB, | I wonder if there is a way to keep the 'object history' empty? That | is, keeping the counter 'packed' while retaining 'object history' | information on all other objects. I'm no ZODB expert, but I think the short story is that you can't have this across several threads -- because you would have to use _v_ attribs. And what good is a ThreadSafeCounter if it's not threadsafe? By the way, the reasons for this to be better as a ZODB object is that you wouldn't have to worry about which filesystem the server runs, and if there is serveral servers? If you have the resources, a really cool thing would be to set up a Zope box running a counter and an XML-RPC script in the other end. That wouldn't be a problem making safe. You do have other stuff to consider then, though. I like XML-RPC. ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] ProxyPass and SiteAccess getting REMOTE_ADDR
From: Oliver Bleutgen [EMAIL PROTECTED] Btw. with a small module it's even possible to log the usernames with apache, something medusa isn't capabable of afaik (as of zope version 2.3). Cool! What module is this, and how do you use it? Cheers, Evan @ digicool 4-am ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Python Scripts
Evan Simpson wrote: You shouldn't have to do anything special; You just call it. How would I pass a DTML namespace that I might have lying around when I make the call so that it gets bound to the appropriate Namespace variable in the script? cheers, Chris ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Refresh DoubleTake :-S
Chris Withers wrote: Shane Hathaway wrote: But here's the biggest news: the Refresh product, which makes life just a little bit easier for filesystem product developers, now has an auto-refresh feature and the ability to set up dependent products. This means changes to your Python modules are instantly recognized by Zope and development is almost as nice as working with ZClasses. http://www.zope.org/Members/hathawsh/Refresh This is really cool :-) However, for some reason, I have to hit the Refresh button twice for any of my chanegs to take effect. Any idea why that is? What product are you refreshing? Maybe it's specific to the product. Shane ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: ThreadSafeCounter
| The ideal solution would be to use an object that lives in the ZODB, | I wonder if there is a way to keep the 'object history' empty? That | is, keeping the counter 'packed' while retaining 'object history' | information on all other objects. That would work, however I just dont think that fits neatly into the ZODB in any way since all objects are appended. I'm no ZODB expert, but I think the short story is that you can't have this across several threads -- because you would have to use _v_ attribs. And what good is a ThreadSafeCounter if it's not threadsafe? Well it would be threadsafe since the object cannot be written too by multiple threads as discussed earlier it will keep try 3 times and then fail. To me the ideal answer is a simple FileSystem product that allows you to mount a file system inside the ZODB. This would implrement locking and be hence be thread safe. Its a real science project. This would also have to be ZEO friendly, but to be honest for my use and most other peoples, this isnt a huge concern. I like XML-RPC. Me too but its slw. -- Andy McKay. ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Windows registry?
This doesn't use svrany.exe, but pythonservice.exe, which is part of the win32 extensions written by Mark Hammond, now with ActiveState. "Python programming on Win32" by Mark Hammond and Andy Robinson contains some documentation on how to use pythonservice.exe. The Windows version of Zope makes use of this driver program, when installing Zope as a service. The relevant logic for running Zope as a Windows service is contained in Zserver/ZService.py. I intend to switch from svrany to using pythonservice.exe for the aforementioned reason. That's almost all I know about this specific topic at this time; I'd suggest that Andy McKay might ask his colleague Mark about pythonservice.exe, instead of doing guesswork :-) I just wanted know details of how the registry is set up so I can quickly fiddle with my service settings and write a script to quickly install and uninstall the services to make moving Zope's much easier on win32. It looks like everything I need to know is in ZServer/ZService, I should have just done my usual source grep before asking... Mark actually works in Australia most of the time so asking him isn't as easy as it sounds... Thansk. Chris. On Mon, 12 Feb 2001, Andy McKay wrote: Anyone tried or got a script to create / delete the windows registry settings for running a zope server as a service. It would make my life a lot easier... If no-one has I could recreate them from observation. -- o ( [EMAIL PROTECTED] (+49 2241) 14-2394 /\* GMD mbH #include _`\ `_=== Schloss Birlinghoven, std.disclaimer __(_)/_(_)___.-._ 53754 Sankt Augustin, Germany ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope ) ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Refresh DoubleTake :-S
Shane Hathaway wrote: Any idea why that is? What product are you refreshing? Maybe it's specific to the product. An NDA'd one ;-) Sorry, that's not a lot of help I know, but what sort of things should I be looking for that'd cause refresh to not work properly? cheers, Chris ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Refresh DoubleTake :-S
Chris Withers wrote: Shane Hathaway wrote: Any idea why that is? What product are you refreshing? Maybe it's specific to the product. An NDA'd one ;-) Sorry, that's not a lot of help I know, but what sort of things should I be looking for that'd cause refresh to not work properly? I just got the same problem this past hour... actually, what happened is changes to one module took effect immediately, while changes to a different module of the same product required two refreshes. It's a dependency mapping problem I thought reload() took care of, but apparently not. However, I have an idea that might solve it. Thanks for the heads-up! Shane ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Refresh DoubleTake :-S
Shane Hathaway wrote: apparently not. However, I have an idea that might solve it. Thanks for the heads-up! Pleasure :-) (as a workaround we've developed the 'Pound on the Refresh button like a monkey' technique *grinz*) cheers, Chris ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Formal argument for acquisition and aq_self
I've just been reading through some academic papers by Tom Mens. The paper at this link looks interesting, as it appears to me to describe a problem that is addressed in Zope by acquisition wrappers. http://prog.vub.ac.be/Research/ResearchPublicationsDetail2.asp?paperID=51 Abstract Most object-oriented languages provide a self pseudo variable that serves two purposes: invoking methods through self sends and returning a self reference. Current formal models capture this behaviour by introducing a self parameter that fulfils both roles. We will show that this double functionality is incompatible with object-based encapsulation. Moreover we will point out that the separation of both functionalities is needed in type systems. We propose a formal model based on a primitive self send construct, and present its denotational semantics. A self reference is implemented through a self send instead of the other way around. This model is extended formally with an object-based encapsulation mechanism. It allows us to keep inheritance, encapsulation and typing orthogonal. This way we obtain a flexible and incremental software development scheme. In the case of Zope, the "self sends" are represented by the way an acquisition wrapper dispatches messages. The "self reference" is given by aq_base (or one of the other aq_ attributes, depending on what you want "self" to mean at the time). -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] ThreadSafeCounter
Would anyone volunteer to write a mounting HOWTO? This is a FAQ.
The ExternalMount product is kind of self instructing,
but a general Mounting HOWTO would be a good thing.
FileStorage is what the standard Data.fs is, and it supports undo.
Just one thing, ExternalMount product uses FileStorage but it doesn't
seem to support undos (not for me anyway)?
Johan Carlsson
From the ExternalMount product
Create an external method that opens a storage and returns a ZODB.DB
object. Enter the module and function name below, along with the path to
traverse within the database to reach the object to be mounted.
An example external method:
import ZODB
from ZODB.FileStorage import FileStorage
def createDB():
return ZODB.DB(FileStorage('/usr/local/zodbs/db1.fs'))
From the ExternalMount product
Andy McKay wrote:
A simpler solution is to use a mounted storage that doesn't do undo,
and
stores changes in place.
You are the second person to answer with that. Would anyone care to give
a
quick how-to on how to mount a non-undoing storage, such as
FileStorage is what the standard Data.fs is, and it supports undo.
since this doesnt seem immediately obvious to me.
Take a look at ExternalMount, and at what's used in the
CoreSessionTracking product.
I can't find a URL for ExternalMount at the moment. I'm using it though,
so it *definitely* exists!
Also, see lib/python/ZODB/dbmStorage.py
"""Very Simple dbm-based ZODB storage
This storage provides for use of dbm files as storages that
don't support versions or Undo. This may be useful when implementing
objects like hit counters that don't need or want to participate
in undo or versions.
"""
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
___
Zope-Dev maillist - [EMAIL PROTECTED]
http://lists.zope.org/mailman/listinfo/zope-dev
** No cross posts or HTML encoding! **
(Related lists -
http://lists.zope.org/mailman/listinfo/zope-announce
http://lists.zope.org/mailman/listinfo/zope )
___
Zope-Dev maillist - [EMAIL PROTECTED]
http://lists.zope.org/mailman/listinfo/zope-dev
** No cross posts or HTML encoding! **
(Related lists -
http://lists.zope.org/mailman/listinfo/zope-announce
http://lists.zope.org/mailman/listinfo/zope )
hfX)x7^!X+Yb~zhr,,+ 3 zw(v)EZelib3j)fjb?^jyw ib3j)fjb?^
Re: [Zope-dev] Re: ThreadSafeCounter
A simpler solution is to use a mounted storage that doesn't do undo, and stores changes in place. You are the second person to answer with that. Would anyone care to give a quick how-to on how to mount a non-undoing storage, such as FileStorage since this doesnt seem immediately obvious to me. -- Andy McKay. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: ThreadSafeCounter
Steve Alexander wrote: Shane's ExternalMount product is here: http://www.zope.org/Members/hathawsh/ExternalMount However, I couldn't find it from searching on zope.org, and it isn't listed on Shane's zope.org page. Oops, I forgot to get it cataloged. Shane ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Refresh DoubleTake :-S
Chris Withers wrote: Shane Hathaway wrote: apparently not. However, I have an idea that might solve it. Thanks for the heads-up! Pleasure :-) (as a workaround we've developed the 'Pound on the Refresh button like a monkey' technique *grinz*) I've added logic to sort the modules by dependency before performing the refresh. It should solve the simian problem. Feedback encouraged! http://www.zope.org/Members/hathawsh/Refresh/ Shane ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: ThreadSafeCounter
"Andy McKay" [EMAIL PROTECTED] wrote: | The ideal solution would be to use an object that lives in the ZODB, | I wonder if there is a way to keep the 'object history' empty? That | is, keeping the counter 'packed' while retaining 'object history' | information on all other objects. That would work, however I just dont think that fits neatly into the ZODB in any way since all objects are appended. Small confusion here: "ZODB" is a higher-level abstraction than "FileStorage"; it is quite feasible to have one or more storages inside your Zope which are "packless" / "undo-less", and which then have the space efficiencies you are looking for (often at a non-trivial time cost). Tres. -- === Tres Seaver[EMAIL PROTECTED] Digital Creations "Zope Dealers" http://www.zope.org ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Introducing ZopePrints.
On 12 Feb 2001, Erik Enge wrote: The rationale behind this is that the community at large would benefit from this by having _real_life_ case studies so when their time has come to implement an application in Zope, they don't fall into the same traps and pitfalls we did. Instead of benchmarks, the Zope community would use implementation documents to decide whether Zope is up for the job or not, that's what really helps. We would love to see this description from you. We inside DC have our own problem solving development process that is large, complex, slow, but often (IMO) accurate if done well. It is based partly on the "Rational" model developed by the Three Amigos: http://www.everything2.com/index.pl?node=the%20three%20amigoslastnode_id=125995 partly on chaos theory, Jim's three laws of engineering (1. F=MA, 2. You can't solve a problem unless you know the answer, 3. You can't push a rope) and on the abundance of Thai food. We also have a "fishbowl" experiment community process, a "dogbowl" content managment design process, a documentation process, and one horse-choking travel policy. I think it would be great to get examples of your problems in a case study format, but also in a higher-level, pattern like description. Your description sounds like it is based on the problem and the goals, which is really great. I'm quite sure that it will also work as a tool for finding gaps and holes in either Zope or its tools and Products. Indeed. We would like to start a project going in the Fishbowl which aims at creating the right tools to document a project as described above. The fishbowl is the perfect place to do this. In a conversation with other people including Brian who is the "keeper of the fishbowl" we realized that documentation artifacts come out of the fishbowl almost as much as the software. In fact, that's one of the whole reasons for the fishbowl, to come up with better software because we thought about it and wrote down some words before we started hacking code. Instant documentation. Good luck! -Michel ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: ThreadSafeCounter
Tres Seaver wrote: ...it is quite feasible to have one or more storages inside your Zope ... often at a non-trivial time cost. Where does the time cost come in? I've noticed a delay on first mounting another storage, but I haven't looked for a delay on accessing objects in the storage. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
