March 1999 - Zope-Dev

Re: [Zope-dev] Rendering DTML Document / Folder properties as structured-text
by Tres Seaver 14 Mar '99

14 Mar '99

Sorry to follow up my own post, but I think I understand the issue now. Since I saw at least one other person puzzled by this problem, I thought I'd try to explain (and let people shoot me down, if I am "even-less-than-an-egg"). > I am trying to capture "free form" input as a property of a Folder / DTML > Document, and display it using StructuredText. > > For instance, I define a property, notes, with type text. I then attempt to > display it, using this DTML: > >  > > I then enter values into the TEXTAREA for the property, e.g.:: > * foo > * bar > > When I display the document, I get mixed results: sometimes it will be partly > rendered as HTML, while sometimes I get the infamous "read only buffer, class" > error. > > What am I doing wrong? The __doc__ comment in StructuredText.py specifies: - A paragraph that begins with a '-', '*', or 'o' is treated as an unordered list (bullet) element. This requirment prohibits "mashing" the lines together, as I naîvely tried to do above. I must leave a blank line between list entries, or else ST cannot distinguish them. This has the unfortunate side effect that all lists emitted by ST look "double spaced", because list items are rendered "around" paragraphs, e.g: <UL> <LI> Foo <LI> Bar </UL> I will look at what it would take to strip the "enclosed" from list items, and submit a patch if it looks simple enough (actually, a patch to allow parsing of list elements without the extra newline would be even better, methinks). -- ========================================================= Tres Seaver tseaver(a)palladion.com 713-523-6582 Palladion Software http://www.palladion.com

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Product manage_traceback caching old old data?
by Anthony Baxter 14 Mar '99

14 Mar '99

I've got a product I'm developing, but I'm finding that interactive debugging of it is being foiled by Zope's Product interface's manage_traceback method. It's caching the very first error that occured - and after I shutdown zope and restart it (having fixed the error) it still gives the same traceback. It's possible that the problem is simply the "Products" listing is at fault - it's still showing the product as "broken", even though else where in Zope I can now add products fine. Any ideas? This is with Zope 1.10.2, under ZServer.

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Rendering DTML Document / Folder properties as structured-text
by Tres Seaver 14 Mar '99

14 Mar '99

I am trying to capture "free form" input as a property of a Folder / DTML Document, and display it using StructuredText. For instance, I define a property, notes, with type text. I then attempt to display it, using this DTML:  I then enter values into the TEXTAREA for the property, e.g.:: * foo * bar When I display the document, I get mixed results: sometimes it will be partly rendered as HTML, while sometimes I get the infamous "read only buffer, class" error. What am I doing wrong? -- ========================================================= Tres Seaver tseaver(a)palladion.com 713-523-6582 Palladion Software http://www.palladion.com

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RE: [Zope-dev] Re: [Zope] sequence of numbers
by Shaw, Howard 13 Mar '99

13 Mar '99

Perhaps if you added a python function which performed range checking and constrained the command to generating between 1 and 100 numbers, etc, DC might be willing to integrate the patch, since this would not leave open the hole DC feared (i.e. ask Python to generate several billion length range). If the range was insufficient for anyone, they could easily modify that code snippet... Thus the Zopist could tune the function to be useful. I am sure DC didn't spend a lot of time on _. functions. They have much else to do, but I expect if you create a wrapper that can make a pythonic function safely available and provide a patch they will probably consider integrating it. Howard C. Shaw III Programmer, SysAdmin St. Thomas High School, Houston, Texas <disclaimer>My opinions are not those of my employer nor am I representing my employer in an official capacity</disclaimer> ---------- From: Bill Randle [SMTP:billr@coinet.com] Sent: Saturday, March 13, 1999 10:37 AM To: Paul Everitt Cc: zope-dev(a)zope.org Subject: [Zope-dev] Re: [Zope] sequence of numbers Paul, Thanks for the suggestion. I had thought of something like that, and my sequence is short, but the problem is I don't know how long it is ahead of time. The actual sequence length is stored in a property. I guess I could brute force it like this:     ...  Before I finished writing this followup, I did some browsing thru the Python book (definite newbie here, also) and found exactly what I was looking for: range(start?, end, step?) So, what I want to do is:  // some stuff  I notice that range() is not in the list of attributes for '_'. Is there any special reason for this? If it was there, I could do this:  Will it work to add "range" to the list of built-ins in line 185 of lib/python/DocumentTemplate/DT_Util.py (line number matches version 1.50)? I've redirected this followup to Zope-dev, as I think I'm talking more about development issues now, than a simple language quesiton. -Bill Randle Central Oregon Internet billr(a)coinet.com On Mar 13, 9:29am, Paul Everitt wrote: } Subject: RE: [Zope] sequence of numbers } } Bill wrote: } > What I want to do is given a limit number, iterate over a sequence of } > DTML commands. This would be an obvious use for #in (which I'm using } > elsewhere for other things) except I don't have a sequence - just the } > number of items in the sequence, as it were. } } Here's a brute-force way to do it, as long as the list of items was } short: } }  } }  }  }  } } --Paul _______________________________________________ Zope-Dev maillist - Zope-Dev(a)zope.org http://www.zope.org/mailman/listinfo/zope-dev (For non-developer, user-level issues, use the companion list, zope(a)zope.org, http://www.zope.org/mailman/listinfo/zope )

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RE: [Zope] sequence of numbers
by Paul Everitt 13 Mar '99

13 Mar '99

Bill wrote: > I notice that range() is not in the list of attributes for > '_'. Is there any > special reason for this? If it was there, I could do this: >  Because someone could do a range over 4 billion things and eat up all the memory on the system. DTML tries pretty hard to keep other people from doing awful things. Sometimes this gets in the way. > Will it work to add "range" to the list of built-ins in line 185 of > lib/python/DocumentTemplate/DT_Util.py (line number matches > version 1.50)? If it works for you, and you feel comfortable with it, then go for it. Ain't open source wonderful? :^) > I've redirected this followup to Zope-dev, as I think I'm > talking more about > development issues now, than a simple language quesiton. I agree. --Paul

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Re: [Zope] sequence of numbers
by Bill Randle 13 Mar '99

13 Mar '99

Paul, Thanks for the suggestion. I had thought of something like that, and my sequence is short, but the problem is I don't know how long it is ahead of time. The actual sequence length is stored in a property. I guess I could brute force it like this:     ...  Before I finished writing this followup, I did some browsing thru the Python book (definite newbie here, also) and found exactly what I was looking for: range(start?, end, step?) So, what I want to do is:  // some stuff  I notice that range() is not in the list of attributes for '_'. Is there any special reason for this? If it was there, I could do this:  Will it work to add "range" to the list of built-ins in line 185 of lib/python/DocumentTemplate/DT_Util.py (line number matches version 1.50)? I've redirected this followup to Zope-dev, as I think I'm talking more about development issues now, than a simple language quesiton. -Bill Randle Central Oregon Internet billr(a)coinet.com On Mar 13, 9:29am, Paul Everitt wrote: } Subject: RE: [Zope] sequence of numbers } } Bill wrote: } > What I want to do is given a limit number, iterate over a sequence of } > DTML commands. This would be an obvious use for #in (which I'm using } > elsewhere for other things) except I don't have a sequence - just the } > number of items in the sequence, as it were. } } Here's a brute-force way to do it, as long as the list of items was } short: } }  } }  }  }  } } --Paul

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RE: [Zope-dev] concerns about the single-threaded nature of zope: large file downloads.
by Paul Everitt 13 Mar '99

13 Mar '99

Anthony wrote: > Can someone who understands these things better provide me > some reassurance? Well I'm certainly not going to let your qualification prevent me from flapping my lips! > If I have a large object inside zope (say for the sake of > argument a one > meg audio message) and it's requested by someone who's on a > godawful link, > which only gets a couple of Kbytes a second of bandwidth. Is > Zope going to > be inaccessible while that file is downloaded? Nope. If you are using PCGI, the entire contents are poured into the PCGI process, which reads it all then trickles it back to the client. That is, PCGI buffers all I/O. I believe both ZopeHTTPServer (with threads turned on) and ZServer behave this way as well. --Paul

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RE: [Zope-dev] De-Authentication / Logout
by Paul Everitt 13 Mar '99

13 Mar '99

Roger wrote: > Jason wrote: > > Is there a setUser type method for AUTHENTICATED_USER? I have tried > > everything, and there isn't any docs. I am trying to have > a user logout > > without having to quit Netscape. Any thoughts? > > -- > > It's always been my impression that unless Zope can be fitted with a > cookie-based-authentication system (vs. the current > basic-auth), there's > *no* way to force a "logout" because of the way the *browsers* handle > basic-auth. The unsupported UserDB package has cookie-based authentication. We're using it here in a consulting gig we're shipping for an intranet budgeting system (written by Jeffrey Shell, it's the best, most polished deliverable we've ever made). There's a chance that this will become a more formal part of Zope on or about May 18. Just a hunch. :^) --Paul

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Re: [Zope-dev] De-Authentication / Logout
by ajs＠pigpond.com 13 Mar '99

13 Mar '99

>>>>> "Roger" == Roger Espinosa <roger(a)umich.edu> writes: Roger> At 4:40 PM -0500 3/12/99, Jason Spisak wrote: >> Zope-misters >> >> Is there a setUser type method for AUTHENTICATED_USER? I have >> tried everything, and there isn't any docs. I am trying to have >> a user logout without having to quit Netscape. Any thoughts? -- Roger> It's always been my impression that unless Zope can be fitted Roger> with a cookie-based-authentication system (vs. the current Roger> basic-auth), there's *no* way to force a "logout" because of Roger> the way the *browsers* handle basic-auth. Generally, the workaround/kludge is to change the authentication realm to something different, since most browsers seem to only remember authentication information for the most recent authentication realm (if I recall correctly). Also note that lynx gets it right since you can press _ to make it forget all known authentication information. - Andrew -- #!/usr/bin/env python print(lambda s:s+"("+`s`+")")\ ('#!/usr/bin/env python\012print(lambda s:s+"("+`s`+")")\\\012') print(lambda x:x%`x`)('print(lambda x:x%%`x`)(%s)')

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concerns about the single-threaded nature of zope: large file downloads.
by Anthony Baxter 13 Mar '99

13 Mar '99

Can someone who understands these things better provide me some reassurance? If I have a large object inside zope (say for the sake of argument a one meg audio message) and it's requested by someone who's on a godawful link, which only gets a couple of Kbytes a second of bandwidth. Is Zope going to be inaccessible while that file is downloaded? -- Anthony Baxter <anthony(a)interlink.com.au> It's never to late to have a happy childhood.

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