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Undo System
by Gregor 12 Jan '00

12 Jan '00

I have a file A and a file B in Zope. I do the following, in order: 1. Edit A 2. Edit B 3. Edit A again. Now I can no longer Undo transaction #1, at least not until I undo #3. Presumably Zope knows this, otherwise it couldn't tell me as much when I try it. So my question is this: Is it feasible to reflect (in the undo list) which transactions do and don't depend on others? Basically, I am thinking that Transaction #1 might be colored red because it requires another undo first. - Gregor vorlon#iglou.com http://anime.at/gregordyne http://www.skysys.org/~gregor Anime, Amber, 3d, Mage, Eidolon, Miscellany

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Re: [Zope] Fix for SiteAccess bug affecting ZCatalog users
by Jeff K. Hoffman 12 Jan '00

12 Jan '00

Evan, I applied the patch in the referenced message and it broke our root page. All requests to http://mysite/index_html worked fine, as did the vhosts. However, any requests to http://mysite/ failed when looking for 'entry_name'. I have removed the patch, and things are now working again, so I can't give you the exact error text without doing some footwork. If the reason for this error doesn't hit you straight away, let me know and I'll get you the details. --Jeff --- Jeff K. Hoffman 704.849.0731 x108 Chief Technology Officer mailto:jeff@goingv.com Going Virtual, L.L.C. http://www.goingv.com/

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RE: [Zope] Restart bug *and* shutdown bug
by Michel Pelletier 12 Jan '00

12 Jan '00

> -----Original Message----- > From: Sam Gendler [mailto:sgendler@impossible.com] > > I suspect that this is a problem caused by a race condition that only > occurs when you have high speed access. I have a very fast network > here, and I can use any combination of machines and OSes and still see > the problem. Possibly. I can now reproduce the bug but not very consistently. This is what I see with a Zope running on my machine, aldous. If I use a browser on aldous: then clicking shut-down usualy shuts it down but sometimes requires me hitting shutdown twice. clicking restart cause Zope NOT to restart and *sometimes* it crashes (no core file though...but the process exits), and I get one of two error messages, either: TypeError Traceback (innermost last): <snip> File /home/michel/src/test/Zope-2.1.2-linux2-x86/lib/python/ZPublisher/BaseRe quest.py, line 285, in traverse TypeError: unbound Python method must be called with Acquirer 1st argument ****OR**** ValueError Traceback (innermost last): <snip> File /home/michel/src/test/Zope-2.1.2-linux2-x86/lib/python/ZODB/FileStorage. py, line 593, in modifiedInVersion (Object: /home/michel/src/test/Zope-2.1.2-linux2-x86/var/Data.fs) ValueError: I/O operation on closed file in the case of getting *either* error message, I get this in the Zope log: ------ 2000-01-12T21:27:28 ERROR(200) ZODB Couldn't load state for '\000\000\000\000\000\000\000\005' If I run a browser on another machine called korak: clicking shutdown causes the Zope process to exit clicking restart causes the Zope process to exit also Can someone verify that this is also the case for them? Or do other people have different symptoms? -Michel

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Re: [Zope] Prompting for login, logging out?
by Sam Gendler 12 Jan '00

12 Jan '00

Art Hampton wrote: > > Sam Gendler wrote: > > Logging a user out is simple. The normal acl_users folder uses basic user > > authentication. The form of authentication causes a browser to send the > > supplied username and password on every request made to that domain name. The > > browser will not stop sending this authentication header until the browser is > > restarted or a page comes back unauthorized, in which case a new login dialog > > box gets sent to the user. Consequently, if you write a dtml method that sends > > a 401 Not-Authorized message back to the user, the browser will present a new > > login box to the user, and it will stop sending the old one. Unfortunately, > > there is no way to combine a redirection with a 401 message, so you cannot > > invalidate their authentication and redirect them to an anonymously available > > page at the same time. Consequently, the best you will be able to do is to have > > them click log out and be immediately faced with a new login box. You can > > provide a page that shows up when the user clicks cancel on the dialog box, > > though. > > Sam, > > Not sure if I'm asking a Zope question or an HTTP question, so I haven't > cc'ed zope(a)zope.org. If it's a Zope question, feel free to cc them on > your reply (if you're kind enough to reply :). > > How do I provide a page that shows up when the user clicks cancel? > > I'm probably going to be using the LDAPAdapter product, if that's any > help. > > Thanks for any help. It is really an HTTP question, but I don't know how Zope addresses the issue. When the server sends the HTTP headers that tell the browser that the user is not yet authorized (401 status code), it can still include a body (an html document) after the headers, just like on a normal request. The browser displays that page when you click cancel. >From looking at the documentation at http://www.zope.org/Documentation/Guides/DTML-HTML/DTML.5.4.html, I would guess that if you serve a standard dtml document to the client, but you call <dtml-call "RESPONSE.setStatus(401)"> from somewhere in the document, you will get a login prompt, but when you hit cancel, you will see the page. If you are interested in other available status codes, check out http://www.w3.org/Protocols/rfc2616/rfc2616.html, a document that every web developer should have just about memorized, if you ask me. Make sure that any images referenced in the page are not in the authenticated folder, or they will get multiple login prompts after hitting cancel. You will have to ask the list if there is a way to do this automatically during acl_users authentication. You might have to resort to modifying the Generic User Folder to do it. I am CC'ing the list for comments. --sam

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External Methods and Blobs
by darryl＠igor.penguinpowered.com 12 Jan '00

12 Jan '00

Been doing some digging, but not luck in finding some example of using Blobs and MySQLdb directly. Does anyone have any code samples? I seem to be getting an error back straight from MySQL saying it doesn't like my string (which is an html file). I suspect this is a quoting issue. -D

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RE: [Zope] Missing Module sha when installing Zope from Source.
by Michel Pelletier 12 Jan '00

12 Jan '00

Please continue to cc: the list. > -----Original Message----- > From: Don Undeen [mailto:dundee@gator.net] > > I installed redhat without Python, or at least I thought I > did. Perhaps > Something went awry during the install, and Python was > installed anyways. The redhat installer requires python. > which python tells me "/usr/bin/python" This (probably) came with redhat. > I also have a usr/local/bin/python. This (probably) came from your compilation from the source. > How do I find out where the Zope installer is looking? Zope isn't looking, your shell, probaby 'bash' is. Unless you dinked with the PATH env variable, bash will find /usr/bin/python first, not /usr/local/bin/python. FIRST make sure at least one of your pythons has sha. Run both '/usr/bin/python' and '/usr/local/bin/python' and see which one works with 'import sha'. THEN copy the one that *does* have sha over the one that doesn't. -Michel

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More REQUEST.set not incrementing SUCCESS!
by Jerry.Spicklemire＠IFLYATA.COM 12 Jan '00

12 Jan '00

Thanks to all the folks who responded with a bunch of good ides. The prize for the most appropriate solution for this particular problem goes to Jim Sanford, and here's the final code that did the trick : <dtml-call "REQUEST.set('z_t',_.string.split(_.str(ZopeTime()))[0])"> <dtml-call "REQUEST.set('u_all',_.string.atoi('0'))"> <dtml-call "REQUEST.set('u_logged',_.string.atoi('0'))"> <dtml-call "REQUEST.set('u_today',_.string.atoi('0'))"> <dtml-call "REQUEST.set('u_not',_.string.atoi('0'))"> <dtml-var u_all> <dtml-var u_logged> <dtml-var u_today><br> <dtml-in count_users_logged> <dtml-let t_all="u_all+1"> <dtml-call "REQUEST.set('u_all',t_all)"> </dtml-let> <dtml-if logged_on> <dtml-let t_logged="u_logged+1"> <dtml-call "REQUEST.set('u_logged',t_logged)"> </dtml-let> <dtml-if "_['z_t']==_.string.split(_.str(_.DateTime(logged_on)))[0]"> <dtml-let t_today="u_today+1"> <dtml-call "REQUEST.set('u_today',t_today)"> </dtml-let> </dtml-if> <dtml-else> <dtml-let t_not="u_not+1"> <dtml-call "REQUEST.set('u_not',t_not)"> </dtml-let> </dtml-if> </dtml-in> It looks (to me) like the reason this works, and other permutations failed, is that <dtml-let> bahaves slightly differently than <dtml-call "REQUEST.set">, as far as persistence of values. I'm not sure if this way of getting there suffers from the data.fs bloat problem, but I'll be watching to see if there's anything detectable. Of course the SQL Gurus out there will be thinking that a series of "select count queries might be faster, but we need to track new logins, which requires checking every row every day, so why not let Zope handle it. Thanks again, Jerry S.

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Re: [Zope-dev] ASP vs Zope vs PHP vs ..?
by Hung Jung Lu 12 Jan '00

12 Jan '00

>But, I'm uncomfortable with loosing touch with an actual HTML/ASP document >in an actual file system. I feel weird about the URL that Zope presents - >there's no simple file name reference, like, http://www.abc.com/mypage.asp >or http://www.abc.com/mypage2.html. Sorry, but my web experience expects >that. I guess there is a SiteAcess product that allows serving from file system, but it requires a bit of work: you'll have to write some external python method. In the near future, they will be releasing Zope 2.2 with virtual hosting capability, and it will be slightly easier to serve from file system. >2. How do you create/maintain the look of the site? Doesn't seem feasible >using the Zope control panel. I prefer using HomeSite (Allaire) for coding >HTML, ASP and any text file. MacroMedia DreamWeaver for complex HTML >design/layout. And I like using MS SQL Server (although I could be >converted..) to support data-driven web sites. How do I integrate these >products with Zope (if at all). The HTML page editing/layout features of >Zope are not clear to me. My personal opinion is that Zope should not get too deep into the business of HTML file editing: it will never be able to compete with applications like DreamWeaver. Virtual hosting is the way to go: let content developer use DreamWeaver to do whatever they want to do, and then let the programmers write methods to strip the headers, insert additional contents (dynamically), catalog the files, etc. In short, right now it's tricky to server files from local file system. But soon enough (a few months?) the situation should be better. Hung Jung ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

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[Fwd: Questions on your ZmySQLDA Tutorial]
by Don Undeen 12 Jan '00

12 Jan '00

This is an email I sent to Alan Pogrebinschi, but everyone on this list has been so helpful, I thought I'd throw this out to the list. Thanks in advance.

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RE: [Zope] Restart bug *and* shutdown bug
by Michel Pelletier 12 Jan '00

12 Jan '00

Let me verify for my sanity, you guys both tried running your browser on another machine right? That appears to have fixed it for me, when I run a browser on a seperate machine the problem does not happen. -Michel > -----Original Message----- > From: Magnus Heino [mailto:magnus@vuab.net] > Sent: Tuesday, January 11, 2000 9:58 AM > To: Martijn Faassen > Cc: zope(a)zope.org > Subject: Re: [Zope] Restart bug *and* shutdown bug > > > > > Any progress on the restart bug front? I am having trouble > with regular > > shutdowns too, not only the previously reported restart weirdness. > > > > When I start the linux binary install with the 'start' > script on RedHat > > 6.1 (with the latest upgrades), I get strange behavior with > 'shutdown' > > in the Control Panel. When I do shutdown, and go back to > the management > > screen, Zope is still running, until I do *another* > shutdown. Sometimes > > I even have to do three shutdowns to get Zope down. This > happens with > > clean Zope 2.1.2 installs. > > > > This is really annoying when you're developing products. > The restart bug > > was difficult, but not being able to shut down reliably > makes even my > > workaround unworkable. > > > > So is there any progress on this? Presumably the restart > and shutdown > > problems are related. Last I saw it was discarded as a RedHat 5.2 > > specific bug, but it definitely isn't. At least not here. > > I have exactly the same problems on RH6.1 and Zope 2.1.2 compiled from > source (I also did a cvs checkout yesterday, but it had the same > problems). > > I first thought it was me doing something wrong, since it was my first > attempt to write a product in python, and that it was "broken" almost > all the time. > > > > I also get a lot of > > 2000-01-07T18:09:02 ERROR(200) ZODB Couldn't load state for > '\000\000\000\000\000\000\002\320' > > is that related, or is that because of the broken product? > > It seems to disappear if I kill zope and all python processes and > restart. > > > > I ended up starting zope with ./start and killing it with ctrl+c > yesterday. I had enough problems trying to understand > zclasses etc than > to bother about if things got reloaded all the time... > > > /Magnus Heino > > _______________________________________________ > 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 ) >

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