req := 'Service=AWSECommerceService&AWSAccessKeyId=mykey&Operation=ItemLookup&ItemId=3952334146&Timestamp=', DateAndTime now printString. sign :=SHA256 hashMessage: 'GET', String crlf, 'ecs.amazonaws.com', String crlf, '/onca/xml',String crlf,req.

(Url absoluteFromText: 'http://webservices.amazon.fr/onca/xml?',req, '&Signature=',sign hex) retrieveContents contentStream.

Wenn did you do the encodeForHTTP? You need it in any case because at least the + sign is an encoded space that will render the date invalid. I think you need do safe url encoding only for the string if it is included in the url not the hash.

Yes, but then Amazon answers a signature not valid error. Indeed it seems I need to pass a secret key (given by Amazon) for SHA256 hash, but I don't find how to pass it to a SHA256 object. In PHP I would write: base64_encode(hash_mac('sha256', $signature, $secret_key)). In Pharo ? Laurent Laffont

Norbert

...

On 07 Nov 2010, at 13:50, laurent laffont wrote:

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The other way. For example

DateAndTime now printISO8601

Laurent

On Sun, Nov 7, 2010 at 1:28 PM, Johan Brichau <johan@inceptive.be> wrote: Laurent,

DateAndTime readFrom: '2008-02-10T12:00:00Z' readStream

Does that yield what you want?

cheers Johan

On 06 Nov 2010, at 15:07, laurent laffont wrote:

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Hi,

I cannot find which method to use to get a Date in iso 8601 format like '2008-02-10T12:00:00Z' ?

Cheers,

Laurent Laffont

Pharo Smalltalk Screencasts: http://www.pharocasts.com/ Blog: http://magaloma.blogspot.com/