December 2000 - Zope

HTTP status code 302
by Hung Jung Lu 10 Dec '00

10 Dec '00

I can view certain document on a Zope site over the web if I use a brower. But for fun I tried to download it by using Python's httplib, and for some Zope sites got a status code 302. This probably means I need to use another URL address. The web browser does this automatically so I don't need to do anything. But I can't seem to find the right URL. Reading from http://www.w3.org/Protocols/HTTP/HTRESP.html , it says that when 302 happens, the header line would be URI: <url> String CrLf But I don't see this line in the returned header. And the returned body is an HTML telling me the document has been moved. Funny thing is that browsers (IE, Netscape) do not have problems with it. Is this a limitation of Python's httplib (not showing the URI in the response header)? Is there a way to circumvent it? Or does this have to do with virtual hosting, or Apache stuff? Thanks, Hung Jung

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Re: [Zope] HTTP status code 302
by Oliver Bleutgen 10 Dec '00

10 Dec '00

Do you > know > any pointer where I can get info on all the headers? This is the specification for http 1.1 http://www.faqs.org/rfcs/rfc2616.html esp. Section 14 for headers, you'll also find 302 and friends explained in this document. and for more pointers http://www.w3.org/Protocols/ cheers, oliver

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duplicate column name
by Olaf Zanger 10 Dec '00

10 Dec '00

i there, i work with postgreSQL 7.0.2, ZPyGreSQLDA-0-0-3 and zope 2.2.2 on suse 7.0 linux when i try the line -> select adr.id,fac.id from fac, adr in the database connection test field i get an error as follows: ->error type: value error ->error value: duplicate column name,id it worked for me until now, because i used different names everywhere. on psql it's no problem did i just screw up some settings or is it ZPyGreSQL? olaf -- soli-con Engineering Zanger Dipl.-Ing. (FH) Olaf Zanger Nusch Lorrainestrasse 23 3013 Bern / Switzerland Fon: +41-31-332 9782 Mob: +41-76-572 9782 mailto:info@soli-con.com mailto:olaf.zanger@soli-con.com http://www.soli-con.com

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Re: boolean help
by Martijn Pieters 10 Dec '00

10 Dec '00

On Sat, Dec 09, 2000 at 01:29:41PM -0800, Robin.Lamb(a)stanfordalumni.org wrote: > I hope you don't think this email innappropriate, but you were so kind > in responding to a previous question that I posted on the zope mailing > list that I thought I would direct this simple question to you alone. It flatters me that you think I may be able to answer your qeustions :) But I would appreciate it if you do keep sending your questions to the mailinglists instead of directly to me. If only so that other people can benefit from any answers you get! I have added the Zope list to recipients of this reply. > I am new at programming and have been unable to code a boolean button > into my Zope Portal registgration form that can recall the previous > selection such that it can be de-selected. Basically, I want to enable > a user on my site to sign-up, flip a boolean on, log out, then later log > back in and unflip that boolean. It's the "unflip" that catches me. I > have been able to make the boolean reflect the fact that it is selected > when the user logs back on, back I can't make it unselectable. Here's > the code I've got now that doesn't allow for de-selecting, > > <input type="checkbox" name="current_college_student" > <dtml-if" member.current_college_student"> > checked > </dtml-if> > value="member.current_college_student"> > <b>Current College Student</b> > > I guess I need to tell the database that if no value is entered, it > should delete "member.current_college_student" from its records. I am not sure what your problem is here. Are you talking about the fact that if the checkbox isn't checked, that the browser doesn't send *any* information about the field 'current_college_student'? If so, you can check for it's absense with the DTML construct '<dtml-unless current_college_student> .. </dtml-unless>. Or you could add a hidden form field *before* the checkbox which defines a default, empty value, like so: <input type="hidden" name="current_college_student:default" value=""> You can of course put any other value in there. The browser will always pass this back to Zope, and then you can test for the value of current_college_student. Hope this helps! > It seems so simple, I'm almost embarrassed to post my question to the > general zope mailing list. Well, it wasn't so simple that you could figure it out on your own. There may be other people that struggle with this, and they would benefit from your questions and the answers you may receive. -- Martijn Pieters | Software Engineer mailto:mj@digicool.com | Digital Creations http://www.digicool.com/ | Creators of Zope http://www.zope.org/ ---------------------------------------------

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Re: [Zope] Failed upgrade to 2.2.4 - solutions?
by Dieter Maurer 09 Dec '00

09 Dec '00

Luke Tymowski writes: > like so in my z2.py? it didn't do anything. > But I can get a python core dump! If you get a core dump, then use a debugger to look into it. This can give you valuable glues wrt the cause of the problem. Dieter

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Re: [Zope] persistence and dictionaries
by Tres Seaver 09 Dec '00

09 Dec '00

Matt <matt.bion(a)eudoramail.com> wrote: > > Chris, this was my original confusion .... the two places below where you say > > "You can put instances which do not inherit from Persistence.Persistent in > your database. They just won't "stick". They'll hang around until the > server is restarted or for an undetermined amount of time during normal > operations." > > "No. It'll work for "a while" or until the server is restarted. :-)" > > actually do persist after restarts ... that's what confused me, they wouldn't > go away and they should!! I think that the confusion here lies in the word, "Peristent". Because it uses the standard Python pickling mechanism, the ZODB can store all kinds of objects (integers, strings, etc., as well as class instances). The ZODB is, however, broken up into a collection of individual records, each of which contains a series of pickles (one per transaction). Objects which are not "ZODB aware" get stored in the pickle of their container (actually, the nearest one which *is* persistence-aware). Deriving your class from Persistence.Persistent says to the ZODB, "put me in my *own* pickle, not it the pickle of my container". The other thing Persistence does is hook the '__setattr__' method, so that changes you make to the object's attributes automatically register it with Zope's transaction machinery; this registration means that a new pickle gets saved to the ZODB at the end of the transaction. Objects which do not derive from Persistence must handle this registration themselves, or else risk having such changes be lost whenever they are reloaded. Globals.PersistentDictionary is a wrapper class which does does this kind of registration in its '__setitem__' method. HTH, Tres. -- =============================================================== Tres Seaver tseaver(a)digicool.com Digital Creations "Zope Dealers" http://www.zope.org

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ZPublisher and func(self,*args,**kw)
by Andreas Jung 09 Dec '00

09 Dec '00

Inside a product I tried to replace the following function def myfunc(self,arg1='',arg2='',REQUEST=None): by def myfunc(self,*args,**kw): to get a more generic interface. However in every case "args" and "kw" are empty when I output their contents inside the function. Bug or feature ? Andreas

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Using Analog and Zope Zserver
by Scott 09 Dec '00

09 Dec '00

Hi All, I'm using analog to analyze my server logs, however I can't figure out how to tell analog to treat everything without an extension as a page. Or perhaps more accurately everything without a "." in it's name. I have read numerous posts to this list regarding index_html or *_html, but much of my site is composed of Zwiki pages, which do not follow that convention. I'm currently playing with the regular expression functions, but I'm not exactly familiar with regex. Any ideas? What is everyone else using when using Zserver, vs. Apache, IIS, etc. Thanks - Scott

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quick python book - question about the feedback form example
by Lee 09 Dec '00

09 Dec '00

Hi, Finally got my hands on The Quick Python book and have read the first 13 chapters. I've now jumped to chapter 26, "Using Zope", to try out some of the examples there. I'm havng a problem with the feedback form example (p326) and I'd be really grateful if someone could point out what I am doing wrong. - I created a directory in the root called 'feedback' and to this I added a DTML document, 'index_html'. I see no probs with this but maybe someone could confirm that the post action is correct for me. index_html ------------- <dtml-var standard_html_header> <FORM ACTION="/cgi-bin/feedback/save_feedback" METHOD="POST"> Type of feedback: <SELECT NAME="feedback_type"> <OPTION>Compliment <OPTION>Criticism </SELECT> <p> Your comments: <TEXTAREA NAME="comments"></TEXTAREA> <INPUT TYPE="SUBMIT" VALUE="Submit Feedback"> </FORM> <dtml-var standard_html_footer> - I then create a python method called 'feedback.py' containing the following: feedback.py -------------- """feedback.py: A simple feedback form application""" def save_feedback(feedback_type, comments): """ A function to handle submitted feedback form data""" # Open a file for appending to save the feedback # creating the file if necessary try: file=open("feedback_data", "a") except IOError: file=open("feedback_data", "w") # Save the data file.write("Feedback type: %s\n" % feedback_type) file.write("Comments: %s\n\n % comments) file.close() return "Thankyou for your feedback!" ^ On the Python method addition screen I use feedback(.py) as the ID + title and insert "feedback_type, comments" in the parameter list. Of course, this results in an error SyntaxError & Invalid token. I tried to modify it by taking out the first 2 lines of the above code, renaming the method 'save_feedback' but still no success. I'm unsure whether the return statement will do anything in Zope also. Can anyone help? - Best regards, Lee (with 10 crossed fingers & toes) -- Lee Reilly mailto:lee.reilly@ntlworld.com http://www.footkick.co.uk/lee

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customize zope manage_main
by richard lanham 09 Dec '00

09 Dec '00

I have looked at many of files in lib/python/app and a other folders in the zope installation. I am looking for a way to change the interface a little. I see some recognizable stuff there, but can't figure out how most of the pages are created, how I could change them. I want to add a frame to the edit page so I can submit while editing without refreshing the page. I would have to put a frame and javascript function I wrote, and include below because it is very useful. This makes editing long docs in a textarea tolerable. I use it on a site with a lower frame where the user can see their changes and not lose their place as they edit/save. thanks, Richard function bgSubmit(frm) { frmHide = parent.frames["hidden"].document var nd="<form name='" + frm.name + "' action='" + frm.action + "' method='" + frm.method + "'>" for (i=0;i<document.forms[frm.name].elements.length;++i) { elem=document.forms[frm.name].elements[i] if (elem.type=="select-one" || elem.type=="select-multiple") { nd+="<select name='" + elem.name + "'" if (elem.type=="select-multiple") {nd+=" multiple "} nd+=">" for (x=0;x<elem.options.length;++x) { nd+="<option " if (elem.options[x].selected) {nd+="selected "} nd+="value='" + elem.options[x].value + "'>" + elem.options[x].text + "</option>" } nd+="</select>" }else if (elem.type=="textarea"){ nd +="<textarea name='" + elem.name + "'>" + elem.value + "</textarea>" } else { nd +="<input type='" + elem.type + "' name='" + elem.name + "' value='" + elem.value + "'" if (elem.checked) {nd+=" checked "} nd+=">" } } nd+="</form>" frmHide.open("text/html"); frmHide.write( nd ); frmHide.close(); parent.frames["hidden"].document.forms[0].submit() } //this function assume you have a frame named "hidden" and takes a form object as arg, e.g., bgSubmit (window.document.frmToSave)

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