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RE: [Zope] PIL Question
by Ross Lazarus 13 May '02

13 May '02

the img tag expects the server to deliver an existing image file from somewhere. What you need to do is a little more complex (!). You COULD write the image into a zope object (bad idea for lots of reasons - eg zodb bloat) or to a localFS (better but still sucky) and deliver it from there using an img tag. AFAIK, this is the ONLY way to embed your image into a page with text and stuff. I use PIL to make images and either email them or return them for the browser to display or to save. Email is good if the generation takes a long time obviously. To get the browser to display a returned image binary, you must set the mime type in the http headers to image/jpeg using or whatever and returning the binary image - the browser will display it correctly. If you want the image to be saveable, it gets worse. IE and netscape are both broken if you try the file-disposition header, it doesn't work as advertised. There's a work around which I use - namely setting the mime type to application/octet-stream > > I'm trying to create an external method that will take variables that exist in a ZSQL call and will output an image > > based on that: > > import Image, ImageDraw, StringIO, os.path > > def PILtest(): > image = Image.new('RGB',[25,25]) > ## IMage Stuff Happens here! > return image > > Where this would occur in a DTML-Method of: > > <dtml-in SQL_COMMAND> > <img src="PILtest">  > </dtml-in> > > But I can't get PILtest to output the image itself. Save() doesn't seem to be of help directly. Anyone have any suggestions? > > Jason -- Ross Lazarus Visiting Associate Professor in Medicine, Channing Labs, 181 Longwood Ave., Boston MA 02115, USA. Fax:+617 525 0958, Office: +617 525 2730

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ZSQL questions
by McDonnell, Larry 13 May '02

13 May '02

Hi, First I want to thank the people who helped me get this populating form thing working (Colin Fox, Tom Passin, and Jon Erickson). I have a couple questions on how ZSQL methods and their behavior. From a form I created, I input the data and hit the submit button. Under superuser the data is added to the db but if I am not superuser, the ZSQL method the you would see in test mode appears where you would need to file in the data again. Why does it work under superuser and no where else? Is it a permission thing? Also on the same subject, how do I suppress the message telling me "no data matched" while it is adding a new record to the db? Thanks. Larry McDonnell Proton Energy Systems 50 Inwood Rd. Rocky Hill, CT 06067 (860) 571-6533 ext. 531 Email:lmcdonnell@protonenergy.com www.protonenergy.com

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Virtualhost monster problems
by Wayne Pascoe 13 May '02

13 May '02

Hi all, I've seen similar things discussed on the list, but not quite this question. I have setup the virtualhostmonster in my root folder. In my apache config, I have the following: <VirtualHost *> RewriteEngine On RewriteCond %{HTTP_HOST} ^.*$ RewriteRule ^/(.*) http://127.0.0.1:8080/VirtualHostBase/http/%{HTTP_HOST}:80/$1 [L,P] <IfModule mod_proxy.c> ProxyRequests On ProxyVia On </IfModule> </Virtualhost> The rewriterule has wrapped to two lines in this e-mail, but in my config it is on one. I have got an A record, zaphod-content.mydomain.com pointed at the IP Address that the Apache httpd server is listening on. In Zope, I have added a folder named zaphod-content.mydomain.com off of root. This has an index_html document in it. When I connect to http://zaphod-content.mydomain.com I get the normal localhost:8080/ page. If I go to http://zaphod-content.mydomain.com/zaphod-content.mydomain.com I get what I expect to. zaphod-content is not the primary name of this machine. The primary name is zaphod. Going to this also gives me the content I would expect to see at localhost:8080/ Any ideas why the contents of zaphod-content.mydomain.com are not being served as / when I request it as zaphod-content.mydomain.com ? TIA, -- Wayne Pascoe <wayne.pascoe(a)ehsbrann.com> Give me enough medals, and I'll win any war. - Napolean

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Creating soft links within ZODB ?
by Oliver Pabst 13 May '02

13 May '02

Hi, I have following Tree: A |-- B |-- | -- C |-- D |-- | -- E is it passible to create E as being a "link" of C, i.e. a copy of all entries in C. So that if a property "p1" is set in B and in D with different values, a call of an object in C (and in its linked copy in E) will see two different values of p1 (respectively as in B and in D) -- --- --- Oliver Pabst .-------------------------. mailto:olpa@sybcom.de : : phone :+49 681 56600600 : project department : SYBCOM GmbH fax :+49 681 56600660 : : http://www.sybcom.de

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Virtual links...
by Josef Meile 13 May '02

13 May '02

Hi! Recently I uploaded a hole website on a folder inside my zopesite. Lets say the old link is www.oldsite.com and the new location is www.myzope.com/folder1/folder2/website/. I just would like to know how can I redirect all the requests from www.oldsite.com to www.myzope.com/folder1/folder2/website/ without using Apache. Thanks in advanced, Josef.

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TinyTablesPlus - key columns
by Roger Fisher 13 May '02

13 May '02

Hello - I am having difficulty setting up an integer "key" (unique) column: Task:int is accepted (integer, not a key) Task* is accepted (string, key) Task:int* and task*:int do not work as expected - the "*" is apparently ignored after the change/save.

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Implementing Backlinks in ZOPE
by Scott Wilson 13 May '02

13 May '02

How to do backlinks in ZOPE =========================== It may not be the nicest code ever, but here is something I wrote to show backwards links from articles published using Zope. If you get it working (or not :-D) and can think of improvements, let me know... BTW, the whole thing is inspired by backlinks code at http://www.downes.ca/referrers.htm and at http://www.disenchanted.com/dis/linkback.html. I couldn't find anything similar for Zope, hence this lot! Enjoy! - Scott =========================== Step 1: Create the Referrer zClass ----------------------------------- This is a little zClass for holding the referral data. Just create a blank zClass, call it Referrer, and add a propertysheet called 'common' with three attributes (referrer, title, count). Count should be an int with default value of 1, the others are strings. Step 2: Create the referrer script to be called from your index_html method ------------------------------------------------------------------------ --- This takes a look at the Request object, and decides whether or not to create a Referrer. Note that it does this inside the context it is being called from, so your calling object must be an Object Manager! Note that you need to change the Product name here too. Call this Python script from the standard "view" method of the object (usually index-_html): ################## ## getReferrals ## ################## from Products.PythonScripts.standard import html_quote import string request = container.REQUEST RESPONSE = request.RESPONSE # # Get referrer # sReferrer = str(request.get_header('HTTP_REFERER')) # # check against the kill list. Definite room for improvement here # if sReferrer <> '' and string.count(sReferrer,'YOUR-DOMAIN-HERE')==0 and string.count(sReferrer,'frontier.userland')==0 and string.count(sReferrer,'google')==0 and sReferrer <> 'None': # # make the referral, or update count for existing referrals # bExists=0 for oReferrer in context.objectValues('Referrer'): if oReferrer.referrer == sReferrer: oReferrer.propertysheets.common.manage_changeProperties(count = oReferrer.count+1) bExists=1 if bExists==0: id = str(context.ZopeTime().strftime('%Y%m%d%H%M%S')) oNewReferrer = context.manage_addProduct['YOUR-PRODUCT-NAME-HERE'].Referrer.createInObj ectManager(id,request) oNewReferrer.propertysheets.common.manage_changeProperties(referrer = sReferrer) ######### ## end ## ######### Step 3: Create a Robot that substitutes real page titles for the URLs --------------------------------------------------------------------- Add this external method to your Zope installation, and call it periodically on all your new Referrer instances (using cron, Scheduler or whatever). NB, you may want to set Python's Proxy values before doing this. This script fetches the URL from each referrer, and extracts any Title tags. Put it into the Extensions folder. ##################### ## getPageTitle.py ## ##################### ## Fetches the URL provided, and returns the title of the page ## If the page is unavailable, or untitled, ## then returns the URL as the title ## import urllib import re import string def getPageTitle(sUrl): try: oWeb = urllib.urlopen(sUrl).read() try: oRe = re.compile("<title>(.*?)</title>",re.I|re.S) oMatch = oRe.search(oWeb) if oMatch <> None: sTitle = string.strip(oMatch.group(1)) else: sTitle = sUrl except: sTitle = sUrl if sTitle == '' or sTitle=='None': sTitle = sUrl except: sTitle = sUrl return sTitle ######### ## end ## ######### On my site the updater script I use to call the external method looks like: for oItem in context.content.objectValues('ContentItem'): for oReferrer in oItem.objectValues('Referrer'): sTitle = context.getPageTitle(oReferrer.referrer) oReferrer.propertysheets.common.manage_changeProperties(title = sTitle) (Where "getPageTitle" is the name of the external method.) ============= Scott Wilson Assistant Director Centre For Educational Technology Interoperability Standards (CETIS) +44 (0)1248 383645 web: http://www.cetis.ac.uk newsfeed: http://www.cetis.ac.uk/news.xml

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How to use conditional statements
by McDonnell, Larry 13 May '02

13 May '02

Hi, As part of my process, I need to have authorized users approval document in the system I am building. I have setup a username/password call and ZSQL. But my problem is error checking. This is how I input the information <form name="form1" method="post" action="password_lookup"> <table width="75%" border="1"> <tr> <td width="27%">Last Name:</td> <td width="30%"> <input name="lastname" size="30" value=""> <td width="27%">Password:</td> <td width="30%"> <input name="password" size="20" value=""> <td width=27%"><input type="submit" name="Submit" value="Submit"> </td> </tr> </table> </form> On password_lookup I call <dtml-in check_password>. If this information is wrong the process continues and I want this to stop. How do I check if there is an error? Also, using <dtml-if> statements , how do I check if the field is empty? The reason is I need to let the user use the next empty approval block. Thanks. Larry McDonnell Proton Energy Systems 50 Inwood Rd. Rocky Hill, CT 06067 (860) 571-6533 ext. 531 Email:lmcdonnell@protonenergy.com www.protonenergy.com

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Zope Backup/Recovery
by Richard McKinley 13 May '02

13 May '02

I recently managed to lock myself out of zope. Is there a way to recover/copy the database containing the DTML documents/ZSQL methods etc. to a new installation? I have had no success in logging into zope with the new superuser I created.. Thanks, Richard _________________________________________________________________ Join the worlds largest e-mail service with MSN Hotmail. http://www.hotmail.com

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Solution UserCounter: PROBLEM(100)
by eric.n.dunn＠bankofamerica.com 13 May '02

13 May '02

---------------------- Forwarded by Eric N. Dunn/USA/BAC on 05/13/2002 10:30 AM --------------------------- Sean Treadway <seant(a)superchannel.org> on 05/13/2002 10:02:27 AM To: Eric N. Dunn/USA/BAC@BankofAmerica cc: Subject: Re: UserCounter I believe this is just a warning. If you wish to get rid of the warning (it dates back to the python 1.5 days.) You can change this line: manage = manage_main = HTMLFile('www/UserCounterStats', globals()) to: manage_main = HTMLFile('www/UserCounterStats', globals()) HTH, Sean On Monday 13 May 2002 15:19, you wrote: > I like your UserCounter and it works great, but I'm getting an error on the > ZServer startup > > 2002-05-13T13:03:50 PROBLEM(100) Init Ambiguous name for method of > Products.User > Counter.Counter.UserCounter: "manage" != "manage_main" > > How can I fix this? > > Thanks > Eric Dunn

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