November 2004 - Zope

Application Design and Photos
by Gregor Melhorn 04 Nov '04

04 Nov '04

Hello Zope users! Maybe you can help me with the following scenario: I'm developing a community site in zope. I don't use CMF or Plone, since I wouldn't be using much of the functionality anyway and therefore would only slow down the site with it. All user data is stored in MySQL. exUserFolder is used for authentication. Registered users should be able to upload photos to my site. These photos may be viewed by other registered users, but no anonymous users (no anonymous access to photos allowed). Now, how do I do this best? Is there any "best practice" on how to give each user a personal gallery? Creating a single folder for every user, and putting images in there for every category? Or should I put all in one big folder, maybe assigning matching photos to users via a table in the database with user-filename columns? There may be around 30 000 users and 200 000 photos. I thought of using the "Photo Folder" product, maybe setting its properties to "external filesystem", so the ZopeDB doesn't get too large. Anybody has experience on that one? Is it possible to use the external filesystem and still prevent anonymous access? Any help would be appreciated! Gregor

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Connected users
by John Poltorak 04 Nov '04

04 Nov '04

Is there any way to tell from within Zope whether there are any users connected at any time? -- John

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manage_addFile method
by Asad Habib 04 Nov '04

04 Nov '04

Hello. Is there a way to pass a variable for the id argument to manage_addFile? I want the user to be able to choose the id for a file that they wish to upload instead of hard-coding it in as a string literal. I have tried the following code which is inside a Python script: fileName = REQUEST.form['publicationsFile'] context.manage_addFile(id=fileName, file=fileName, title=' ', precondition=' ', content_type='application/pdf') The error I get is as follows: Error Type: Bad Request Error Value: The id "<ZPublisher.HTTPRequest.FileUpload instance at 0x46a0170>" contains characters illegal in URLs. However, if I use a string literal, everything works fine. The following yields no errors but doesn't serve my purpose: fileName = REQUEST.form['publicationsFile'] context.manage_addFile(id='fileName', file=fileName, title=' ', precondition=' ', content_type='application/pdf') Also, if anyone knows of another method that could achieve the same purpose, please let me know. Any help would be greatly appreciated. Thanks. - Asad

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ZopeXMLMethods and Pyana in 2.7.3
by Kees de Brabander 04 Nov '04

04 Nov '04

Hi I'm using ZopeXMLMethods (1-0-0) and Pyana (0.9.1), operating system: different versions of Windows. Somewhere between Zope 2.7.0 and 2.7.3 something appears to be broken. When I try to add a XSLT Method, being logged in as administrator, I am forced to authenticate again, which fails of course with an Unauthorized error. Happens both on windows XP and Windows98SE. Traceback below. Any clue? tia Cornelis J. de Brabander Traceback (innermost last): a.. Module ZPublisher.Publish, line 175, in publish_module_standard b.. Module ZPublisher.Publish, line 132, in publish c.. Module Zope.App.startup, line 204, in zpublisher_exception_hook d.. Module ZPublisher.Publish, line 101, in publish e.. Module ZPublisher.mapply, line 88, in mapply f.. Module ZPublisher.Publish, line 39, in call_object g.. Module Shared.DC.Scripts.Bindings, line 306, in __call__ h.. Module Shared.DC.Scripts.Bindings, line 343, in _bindAndExec i.. Module Products.PageTemplates.PageTemplateFile, line 106, in _exec j.. Module Products.PageTemplates.PageTemplate, line 96, in pt_render <PageTemplateFile at /cursus01/kwigi/create> k.. Module TAL.TALInterpreter, line 190, in __call__ l.. Module TAL.TALInterpreter, line 234, in interpret m.. Module TAL.TALInterpreter, line 611, in do_loop_tal n.. Module Products.PageTemplates.TALES, line 206, in setRepeat o.. Module Products.PageTemplates.TALES, line 221, in evaluate URL: create Line 70, Column 6 Expression: standard:'here/availableProcessors' Names: {'container': <__FactoryDispatcher__ instance at 01EC0CB0>, 'context': <__FactoryDispatcher__ instance at 01EC0CB0>, 'default': <Products.PageTemplates.TALES.Default instance at 0x01E91EE0>, 'here': <__FactoryDispatcher__ instance at 01EC0CB0>, 'loop': <SafeMapping instance at 01EC0C60>, 'modules': <Products.PageTemplates.ZRPythonExpr._SecureModuleImporter instance at 0x01E89AF8>, 'nothing': None, 'options': {'args': ()}, 'repeat': <SafeMapping instance at 01EC0C60>, 'request': <HTTPRequest, URL=http://localhost:8080/cursus01/kwigi/manage_addProduct/ZopeXMLMethods/cr eate>, 'root': <Application instance at 023B21D0>, 'template': <PageTemplateFile at /cursus01/kwigi/create>, 'traverse_subpath': [], 'user': admin}p.. Module Products.PageTemplates.Expressions, line 201, in __call__ q.. Module Products.PageTemplates.Expressions, line 189, in _eval r.. Module Products.PageTemplates.Expressions, line 145, in _eval __traceback_info__: here s.. Module Products.PageTemplates.Expressions, line 340, in restrictedTraverse __traceback_info__: {'path': ['availableProcessors'], 'TraversalRequestNameStack': []} Unauthorized: You are not allowed to access 'availableProcessors' in this context (Also, an error occurred while attempting to render the standard error message.)

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Zsql / Zcatalog
by Christopher Rivard 04 Nov '04

04 Nov '04

Hello, I am having some difficulty passing a value from a python script into a url from a zsql method to a zcatalog. I am following this example: http://zope.org/Members/rbickers/cataloganything The issue that I am having is that the value of pub_id will not display in the url. The id is being passed into the catalog, just not displayed in the url. Any suggestions? Thanks, Chris for publication in container.view_publications_sql(): publication.catalog_object(publication, '/publications/cat_pub_detail/+publication.pub_id+/publication_html') print publication # print publication.pub_id return printed

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Zope 2.7.2 and ExternalFile
by Jadran Prodan 04 Nov '04

04 Nov '04

Hi, I upgraded Zope 2.5.1 to 2.7.2 and i have a problem with ExternalFile. The script which worked before: ... documents.manage_addProduct['ExternalFile'].manage_add(efid, '', '', target_filepath) ... Now produce error: ... Traceback (innermost last): Module ZPublisher.Publish, line 101, in publish Module ZPublisher.mapply, line 88, in mapply Module ZPublisher.Publish, line 39, in call_object Module Shared.DC.Scripts.Bindings, line 306, in __call__ Module Shared.DC.Scripts.Bindings, line 343, in _bindAndExec Module Products.PythonScripts.PythonScript, line 323, in _exec Module None, line 14, in addDocument <PythonScript at /todolist/scripts/addDocument> Line 14 AttributeError: manage_add ... Any tip? Thank you. LP, Jadran

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ANNOUNCE: Pound - reverse proxy and load balancer - v1.8
by Robert Segall 04 Nov '04

04 Nov '04

This is to announce the release of Pound v1.8. Changes in this version: - added support for non-blocking connect(2) - added support for 414 - Request URI too long - added RedirectRewrite directive - to prevent redirect changes - added support for NoHTTPS11 value 2 (for MSIE clients only) - added support for HTTPSHeaders 3 (no verify) Problems fixed: - fixed bug if multiple listening ports/addresses - fixed memory leak in SSL - flush stdout (if used) after each log message - assumes only 304, 305 and 306 codes to have no content - fixed problem with delays in 302 without content - fixed problem with time-outs in HTTPS Enhancements: - improved threads detection code in autoconf - added supervisor process disable configuration flag - tweak for the Location rewriting code (only look at current GROUP) - improved print-out for client certificate information The software is at version 1.8 (production quality). Further testing (especially under heavy loads), improvements and suggestions are welcome. What is Pound (from the Web page) - a reverse-proxy: it passes requests from client browsers to one or more back-end servers. - a load balancer: it will distribute the requests from the client browsers among several back-end servers, while keeping session information. - an SSL wrapper: Pound will decrypt HTTPS requests from client browsers and pass them as plain HTTP to the back-end browsers. - an HTTP/HTTPS sanitizer: Pound will verify requests for correctness and accept only well-formed ones. - an HTTP/1.1 to 1.0 proxy. - a fail-over-server: should a back-end server fail, Pound will take note of the fact and stop passing requests to it until it recovers. - a request redirector - it will pass client requests to separate groups of servers, based on required URL and the presence or absence of headers (pattern matching) Pound was specifically developed to serve as a front-end for multiple instances of Zope running on top of a common ZEO storage, but can be used with any other web server. A patch for the Python source of z2.py is available as part of the distribution to allow using Pound's SSL capabilities. Pound is currently in use in several medium to large volume sites and seems to be holding up quite well: largest reported site does about 5.5 million requests per day, peaking at over 450 requests per second. The speed is well superior to other, equivalent solutions, the configuration is much simpler and the necessary resources (CPU, RAM, disk) are much, much lower. Pound is distributed under the GPL. For further information, download, etc. please see http://www.apsis.ch/pound Pound has its own mailing-list - just send a message to pound-subscribe(a)apsis.ch in order to join. Enjoy and let me know how it works for you. -- Robert Segall Apsis GmbH Postfach, Uetikon am See, CH-8707 Tel: +41-1-920 4904

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session timeout detection
by Beat Birkhofer 04 Nov '04

04 Nov '04

Hi What's the common method to detect a session timeout to display an error page to the client? I tried getBrowserIdManager().hasSessionData() but this doesn't work. Regards Beat H.

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change user password
by Eddy Ilg 04 Nov '04

04 Nov '04

Hi, another question that zope.org could not answer: How can I implement a own interface to change the user password? (Standard Zope acl user) Eddy

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Broken Links
by Laura McCord 03 Nov '04

03 Nov '04

Is there a plugin or tool for zope/plone to traverse through a website checking for broken links? -Laura

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