June 2002 - Zope - Zope lists

Re: [Zope] restricting the number of concurrent logins
by David Burton 10 Jun '02

10 Jun '02

(To do it in ASP you'd need to add Application variables, keep refreshing them when pages are accessed, and probably handle starting a connection in the session_start in global.asa, which is equally a pain) An applet would run on the client machine - quite a few chat sites use java applets to facilitate real-time communication, for example. It's not at all like ASP, and would be restricted to clients that have Java enabled, and would require a server program to maintain the connections. That would be more reliable in some ways because the applet be kept running on the client (perhaps in a hidden frame so it's not apparent or reloaded), and the server just needs to monitor how many connections are open, and limit it to whatever number. It's not that practical when you can't assign another IP address or port, and you need to write the client and server applets, however, and wouldn't really be a Zope-based solution, either. Unless you need an absolutely real-time method, rather than ones that can hold a session open for a few minutes extra, use the other method suggested. The best way may be to write a product that increments the values. You may be able to avoid using persistence, too - since you would reset the active connections to zero when the server is rebooted, too, but I haven't tried anything like this in Zope myself so I'm not sure, and any implementation would have to be done by someone else... HTH, David Burton 10/06/2002 09:43:39, John Doe <gvd_76(a)yahoo.com> wrote: >Hmm, I had an analog idea in mind, but instead using >the browserid; ip is probably better (if I add the >port to prevent proxies) > >This applet: would this simulate the functionality of >ASP (where it's apparently possible to keep session >information)? Do you have an example of such an >applet or further information? > > >In either case, thx for your insights so far. > >Grts, >John > >--- David Burton <eloquence(a)eloquent-designs.f2s.com> >wrote: >> One problem with this idea is that HTTP is >> stateless. >> >> You would only be able to log the number of >> concurrent users on the basis of assuming that a >> session times out after a given period of inactivity >> (say 5 >> minutes) or on logout. >> >> (Alternatively a little Java Applet could provide >> login/logout calls). >> >> In either case, you would probably have scripts that >> check the last login times for each user (perhaps >> differentiate each user by IP address, so that >> multiple >> users can log in with the same username if >> necessary?). >> The calls to the login checking script from each >> protected page could check if any of the current >> sessions have timed out, and remove them if they >> have. >> Then it could check if the user is already on the >> list, updating their last access time if they are. >> Failing that, it can check if the maximum number of >> users has >> been reached, adding the user if there is another >> user allowed, and otherwise redirecting to a 'Max >> Users Reached' kind of page. >> >> Theoretically this wouldn't be too hard to do - >> you'd need to make sure that the users have >> permission to update the object storing these login >> details (which >> could be just stored as properties in a DTML >> Document even, or a database table alternatively), >> or give the update script the permission to update >> that >> object. >> >> That would be one way of doing things... I don't >> know if there's a pre-written product to do this - I >> haven't seen one... >> >> HTH, >> David Burton >> >> 07/06/2002 13:08:37, John Doe <gvd_76(a)yahoo.com> >> wrote: >> >> >Is it possible to restrict the number of concurrent >> >logins per user (maybe using a SessionManager?) ? >> > >> > >> > >> >__________________________________________________ >> >Do You Yahoo!? >> >Yahoo! - Official partner of 2002 FIFA World Cup >> >http://fifaworldcup.yahoo.com >> > >> > >> >_______________________________________________ >> >Zope maillist - Zope(a)zope.org >> >http://lists.zope.org/mailman/listinfo/zope >> >** No cross posts or HTML encoding! ** >> >(Related lists - >> > >> http://lists.zope.org/mailman/listinfo/zope-announce >> > http://lists.zope.org/mailman/listinfo/zope-dev ) >> > >> "Into the abyss we stare, hoping that the abyss does >> not gaze so intently upon us" >> >> > > >__________________________________________________ >Do You Yahoo!? >Yahoo! - Official partner of 2002 FIFA World Cup >http://fifaworldcup.yahoo.com > "Into the abyss we stare, hoping that the abyss does not gaze so intently upon us"

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Re: [Zope] Symlinks?
by Jaroslav Lukesh 10 Jun '02

10 Jun '02

| Odesílatel: Oliver Marx <oliver(a)tekk.dk> | Well, you can add a property to the PortableHole telling you. Oh... Of course! | The idea of a symlink/PortableHole is that you dont have to worry about | where it points. You just use it. I want it only for reference purposes in manage view, not for displaying in rendered page. Because while I test it, I was forget where I was get symlinked files 8-) Many thanks, J. Lukesh <spam><noflame> | >>Incoming mail is certified Virus Free. | >>Checked by AVG anti-virus system (http://www.grisoft.com) | >>Version: 6.0.370 / Virus Database: 205 - Release Date: 05-06-2002 Incoming mail should not be certified for viruses, because it is not "Microsoft like" | Outgoing mail is certified Virus Free. | Checked by AVG anti-virus system (http://www.grisoft.com) | Version: 6.0.370 / Virus Database: 205 - Release Date: 05-06-2002 Outgoing mail should not contain viruses, because I do not use "virus like" platform I know boys from AVG - all other antiviruses are AVeraGe only :) </noflame></spam>

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RE: [Zope] Symlinks?
by Oliver Marx 10 Jun '02

10 Jun '02

Well, you can add a property to the PortableHole telling you. The idea of a symlink/PortableHole is that you dont have to worry about where it points. You just use it. \Oliver >>-----Original Message----- >>From: Jaroslav Lukesh [mailto:lukesh@k-net.cz] >>Sent: 10. juni 2002 09:47 >>To: Oliver Marx >>Subject: Re: [Zope] Symlinks? >> >> >>| Odesílatel: Oliver Marx <oliver(a)tekk.dk> >>| One word - PortableHole >> >>It looks fine. But is it possible to show where symlink points (original >>object(s), or path)? I did not derivate any information about originals. >> >>Thanks, J. Lukesh >>--- >>Incoming mail is certified Virus Free. >>Checked by AVG anti-virus system (http://www.grisoft.com) >>Version: 6.0.370 / Virus Database: 205 - Release Date: 05-06-2002 >> --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com) Version: 6.0.370 / Virus Database: 205 - Release Date: 05-06-2002

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Zope 2.5 and TransparentFolder incompatibility
by Howard Hansen 10 Jun '02

10 Jun '02

Google doesn't tell me anything definitive, but it seems that the laudable TransparentFolder product is incompatible with Zope 2.5. Something about a conflict with session tracking? Is this so? Do I have to muck up my management screens with hundreds of little files? Does anyone have a patch or an alternative? Thanks! Howard Hansen http://howardsmusings.com

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Re: [Zope] Symlinks?
by Jaroslav Lukesh 10 Jun '02

10 Jun '02

| Odes�latel: Oliver Marx <oliver(a)tekk.dk> | There is also PortableHole. | | >>-----Original Message----- | >>From: zope-admin(a)zope.org [mailto:zope-admin@zope.org]On Behalf Of | >>Dieter Maurer | >>Jaroslav Lukesh writes: | >> > Does know how to make symlinks between subfolders in Zope | >>filesystem like | >> > in linux? | >>There is Shane's "Symlink" product. | >> | >>Be careful, however! It may bite you (see mailing list archives, | >>for details). Thanks, I will try both. But I cannot find Shane Symlinks at zope.org REgards Jaroslav Lukesh, K-net ------------------------------------------------------------------------ www.k-net.cz Multimedia, Networking, Communications, terminals, NC, R+D

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Re: Zope digest, Vol 1 #2149 - 24 msgs
by Dan Shafer 10 Jun '02

10 Jun '02

At 12:00 PM 6/9/2002 -0400, John Schinnerer wrote: >Can you say more about what it covers well, and how it's been helpful >(besides ZPT and debugging, as you already mentioned)? I think someone >posted a while back that it was their fave for python/zope - scripts, >products, that sort of thing? Do you agree? That's the stuff I most >need good docs for... Yep, that nails it. This book has really focused on Python script and product creation. While it does cover ZClasses, it's the first place I've seen anywhere that pulls together good docs and examples on scripting and product creation. Exactly what I needed. Dan Shafer, Chief Scribe and Tablet Keeper PythonCard Open Source Project http://pythoncard.sourceforge.net

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Re: [Zope] dtml-var probleman
by Maik Jablonski 09 Jun '02

09 Jun '02

On Sun, 2002-06-09 at 15:24, Daniel Schmitz wrote: > Ok, lets go: > > i have: > > root > | > |- index_html > | > \[contents] > | > |- myhistroy > > In myhistory, i have the code: > > <H1>This is my History<H1> > This is.............. > > > and my index_html: > > <dtml-var "contents.myhistory"> > > > but the output is: > > &lt;H1&gt;This is my History&lt;H1&gt; > ..... > > > and i need the output formated in html!! > > > ps.: Dear Bak @ kedai, i use contents.myhistory() but > don't works... > > Thanks, > Daniel Schmitz Now I've got it... several ways... most clear approach: <dtml-with contents> <dtml-var myhistory> </dtml-with> if you don't need a special client-object: <dtml-var "contents.myhistory(None,_)"> or if you need contents as your client-object [the object, myhistory is called on]: <dtml-var "contents.myhistory(contents,_)"> greetings, maik

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Re: [Zope] ZPT rendering
by Bak ＠ kedai 09 Jun '02

09 Jun '02

i think you need to use structure: as in: <ul> <li tal:repeat="child container/folder/objectValues"> </li> </ul>

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ZTP here vs container
by Tim 09 Jun '02

09 Jun '02

In the ZopeBook an example is given for listing all the information for objects in the current folder. To make it work with subfolders (ie. the page template stays in the root folder, but access it via subfolders) I changed the container/ to here/, and it worked as expected. The current folder objects were displayed rather than always the root folder. Now, i've been trying to use this technique to list the subfolder of any accessed folder but it doesn't seem to work. For example (to demonstrate), if i put this in a page template in my root folder: container here here/folders And then access the page template from subfolders, i can see the value of "container" always stays the same (of course), and the value of "here" changes (as I'd expect), yet the list returned by "here/get_folders" always stays the same, where i would expect it to change with its context (but it continues to always list of folders from the root container)... Surely I am missing something simple? (using Zope 2.5 on FreeBSD 4.5)

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Size of a ZClass string property
by Pierre Godefroy 09 Jun '02

09 Jun '02

How do you get the size of a string property attached to a ZClass? I have tried (txtfrench being the string property) <dtml-in "objectValues(['bout projet'])"> <dtml-var title> <dtml-var txtfrench.getSize()> </dtml-in> but it does not work... Thanks in advance. Pierre Godefroy 52 rue des Archives 75004 PARIS FRANCE Tél. : +33 (0)1 42 74 46 05

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