[Seaside] post form to external website

Boris Popov boris at deepcovelabs.com
Fri Jan 9 22:48:45 UTC 2009

Seaside does include _s and _k in its own forms, see attached.


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boris at deepcovelabs.com


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-----Original Message-----
From: seaside-bounces at lists.squeakfoundation.org
[mailto:seaside-bounces at lists.squeakfoundation.org] On Behalf Of Ramon
Sent: Friday, January 09, 2009 2:44 PM
To: 'Seaside - general discussion'
Subject: RE: [Seaside] post form to external website

> Hello all,
> I'm building a Seaside (version 2.9) component for uploading files 
> directly to an Amazon S3 bucket. For this AWS supports HTTP POST 
> requests, see 
> http://docs.amazonwebservices.com/AmazonS3/2006-03-01/index.ht
> ml?UsingHTTPPOST.html
> I can create the form that fulfills the AWS specifications, with one 
> exception: Seaside adds two hidden parameters to the for _s and _k 
> This breaks the AWS security checks on the form parameters.
> These parameters are not required when posting to an external website.

> Is there an easy way to remove them in this situation?
> Regards,
> Jan.

Just thinking about this off the top of my head, are you sure this has
anything to do with Seaside?  

Form submits happen on the client, when you submit a form to anywhere,
all the inputs in the form and all the parameters in the current url
will be submitted to the target url.  I imagine the _s and _k are there
because they're in the URL, not because Seaside is doing anything funky
or including any hidden params.  I don't see any hidden params in my

Ramon Leon

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