Comments on: How to use the new Amazon AWS Signature in PHP

By: bbcentral

bbcentral — Sun, 08 Nov 2009 15:49:44 +0000

Everything is identical to the way it worked before August, you shouldn’t have to change anything else. The order shouldn’t matter, nor should adding other parameters. It’s basically lines 5-12 that you can change safely (don’t remove the timestamp parameter or else the code will break).

Hope that helps!

By: mb

mb — Sat, 07 Nov 2009 17:58:16 +0000

So what exactly is the output of this? Is it the same API output (XML format) from before August? Also, what if I wanted to use other parameters than you have listed? What is the order, or would I have to play with it?

By: eddg67

eddg67 — Thu, 23 Jul 2009 19:27:27 +0000

I noticed after trying to use your code sample that ur doing a str_replace after already generating the $sig which could cause the signature not to match.

$sig = base64_encode(hash_hmac(’sha256′, $sig, SECRET_KEY, true));
$sig = str_replace(‘+’,'%2B’,$sig);
$sig = str_replace(‘=’,'%3D’,$sig);

Thanks again for posting. It really helped me get my class working.

By: eddg67

eddg67 — Wed, 22 Jul 2009 21:11:52 +0000

Thanks for the quick responsive. I am also trying to write a class to handle the new signature requirement where I was planning on including ur build signature method but have not got it too work yet. Thanks for posting this example to get me on the right path .
So if u can post the revisions I would really like to see how u handle rebuilding the query string for Operation= ItemLookup.

By: bbcentral

bbcentral — Wed, 22 Jul 2009 17:15:14 +0000

I probably didn’t need to include that line, I reuse it later on in my script for another reason. Same thing with the $aws array, it’s used later (I wrote my own custom class for all AWS requests).

I’m tweaking my original code right now, there’s a few types of queries that don’t work with it. I’ll try to update it sometime soon.

By: eddg67

eddg67 — Wed, 22 Jul 2009 16:46:31 +0000

What am I missing here ? When do u use $rebuilt_url ? Also why are u using an array to store $aws['url'] ?

By: bbcentral

bbcentral — Thu, 02 Jul 2009 03:55:14 +0000

That part of the code came from elsewhere, you could be right but I’m not changing my code now. It works fine for me.

By: Ulrich

Ulrich — Fri, 12 Jun 2009 16:09:29 +0000

Hi,
why are you using uksort($params, ’strnatcmp’);? Afaik ksort($params) would be better.