[seaside] caching problem

saza solutions fzak at sazasolutions.com
Thu Oct 26 14:48:17 UTC 2006

The static content, the gifs, change, that is, for instance: where I must have an edit gif, appears anything else, for instance a delete gif.
  What apperars mixed-up in the web brwoser are the gif, the server static files, which I cache its byteArrays in ScriptingSystem formDictionary.
  For instance, by means of "toggle halos", and "S" I can see the html generated by the server, this is a piece of html:
           <td class="row">
          <a href="...bCzEZZYt">
           <img border="0" alt="" src="/seaside/DES?_s=VmTXqtlZoqwPFQvv" />
  "/seaside/DES?_s=VmTXqtlZoqwPFQvv"  referes to the gif, for instance to the gifA, and the gifA is shown.
  Somehow, the same ?_s=VmTXqtlZoqwPFQvv after some time referes to another gif, a gifB. If I click the web brower refresh button, or delete all off-line content of temporary internet files every time or -as I´m trying now- change the expiration time to a shorter time, It seems I´m avoiding this... but I´m not sure.
  thank you,
Philippe Marschall <philippe.marschall at gmail.com> escribió:
  2006/10/25, saza solutions :
> Hi all,
> This is the first time I make a submition to the list.
> For the last year and a half I´ve been using seaside in squeak, and built a
> decision engine application.
> I´ve been experiencing the following: all the gifs appeare mixed up.
> I cache the gifs, putting all the gifs in ScriptingSystem formDictionary, I
> store the byteArray directly.
> I realized that the application has been using offline content stored in the
> temporary files folder. Then, I change Explorer setting to check the version
> of a page, every time the page is visited (the previous setting was
> "automatic"). But I continued experiencing the problem.
> Then I realized that the key generated in WAExternalID by means of:
> initialize
> GeneratorMutex critical:
> [1 to: self size do: [:i | self at: i put: ((($a to: $z), ($A to: $Z))
> atRandom: Generator) asInteger]]
> was exactly the same as one located in the temporary files.
> I also saw that WADocumentHandler>>response sets an expiration time to year
> 2095.
> response
> | response |
> response _ WAResponse new.
> response contents: self mimeDocument contentStream text.
> response contentType: (mimeType ifNil: [self mimeDocument contentType]).
> response headerAt: 'Expires' put: 'Thu, 01 Jan 2095 12:00:00 GMT'.
> fileName ifNotNil:
> [response headerAt: 'Content-Disposition' put: 'attachment; filename=' ,
> fileName].
> ^ response
> Now, I´m attacking the problem in the following ways:
> - changes the web browser setting to review page version every time is
> visited.
> - changed expiration time to a shorter time.
> - changed the way WAExternalID is generated, trying to make it more random.
> Does anybody has another ideas ?, Am I facing the problem correctly ?,
> Thanks in advance,
> I´d like to add that Seside is an amazing and productive framework.
> Felipe

Whats the bigger problem you're trying to solve? Serve static files?
Serve dynamically generated files?

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