Script to Scraping Amazon Product in PHP with Amazon API

Well, this time I will share about how to scraping amazon products using Amazon API. Many new amazon players are still confused how amazon API worked to scraping amazon product. I dont suggest you to do the screen scraping, Because is not permissable. Scrap amazon products using the API is a legal way. Beside legal, its more easy to use than screen scraping.

Who still confused about scraping amazon products using APIs can see the video snippet below

`To build Scraping Amazon script, you need to prepare.`

`1. Get your amazon public key and amazon private key from aws.amazon. Read here for more info.`

`2. Build Function in PHP to get Product Advertising API URL`

I got the function from this site, visit there if you need to learn more. I do a little modification to be easy to use.

function aws_signed_request($region, $params, $public_key, $private_key)
{
$method = "GET";
$host = "ecs.amazonaws.".$region;
$uri = "/onca/xml";
$params["Service"] = "AWSECommerceService";
$params["AWSAccessKeyId"] = $public_key;
$params["Timestamp"] = gmdate("Y-m-d\TH:i:s\Z",time()); //may not be more than 15 minutes out of date!
$params["Version"] = "2009-03-31";
ksort($params);
$canonicalized_query = array();
foreach ($params as $param=>$value)
{
$param = str_replace("%7E", "~", rawurlencode($param));
$value = str_replace("%7E", "~", rawurlencode($value));
$canonicalized_query[] = $param."=".$value;
}
$canonicalized_query = implode("&", $canonicalized_query);
$string_to_sign = $method."\n".$host."\n".$uri."\n".$canonicalized_query;
$signature = base64_encode(hash_hmac("sha256", $string_to_sign, $private_key, True));
$signature = rawurlencode($signature);
$request = "http://".$host.$uri."?".$canonicalized_query."&Signature=".$signature;
return $request;
}

function aws_signed_request($region, $params, $public_key, $private_key)

{

$method = "GET";

$host = "ecs.amazonaws.".$region;

$uri = "/onca/xml";

$params["Service"] = "AWSECommerceService";

$params["AWSAccessKeyId"] = $public_key;

$params["Timestamp"] = gmdate("Y-m-d\TH:i:s\Z",time()); //may not be more than 15 minutes out of date!

$params["Version"] = "2009-03-31";

ksort($params);

$canonicalized_query = array();

foreach ($params as $param=>$value)

{

$param = str_replace("%7E", "~", rawurlencode($param));

$value = str_replace("%7E", "~", rawurlencode($value));

$canonicalized_query[] = $param."=".$value;

}

$canonicalized_query = implode("&", $canonicalized_query);

$string_to_sign = $method."\n".$host."\n".$uri."\n".$canonicalized_query;

$signature = base64_encode(hash_hmac("sha256", $string_to_sign, $private_key, True));

$signature = rawurlencode($signature);

$request = "http://".$host.$uri."?".$canonicalized_query."&Signature=".$signature;

return $request;

}

Call that function with this syntax below

$parameters=array(
'Operation' =>'ItemLookup' ,
'ItemId' =>$sku , // change $sku with ASIN code
'AssociateTag' =>$tag, //Your AssociateTag url
'ResponseGroup' =>'Large' , //Small, Medium, Large or SellerListing
);
$public_key =$pub_key; // Change with your public key
$private_key=$priv_key; // Change with your private key
$ext='com'; //extension of server, see data.php
ksort($parameters); // To shorting variable $parameters
$A=aws_signed_request($ext,$parameters,$pub_key,$priv_key); // Call aws_signed_request

$parameters=array(

'Operation' =>'ItemLookup' ,

'ItemId' =>$sku , // change $sku with ASIN code

'AssociateTag' =>$tag, //Your AssociateTag url

'ResponseGroup' =>'Large' , //Small, Medium, Large or SellerListing

);

$public_key =$pub_key; // Change with your public key

$private_key=$priv_key; // Change with your private key

$ext='com'; //extension of server, see data.php

ksort($parameters); // To shorting variable $parameters

$A=aws_signed_request($ext,$parameters,$pub_key,$priv_key); // Call aws_signed_request

The results of the $A variable is you will get Product Advertising API URL like

If you get results as above, you've managed to get Amazon product XML. With a few additions and looping statements in the script above you will get thousands of Amazons data , within a matter of hours.

You can combine with my ASIN GRABBER SCRIPT to get a reliable program. See and try my example here.

For scraping amazon xml data and how to arrange the data so that look elegant, i will discuss on the next article, if you have a question please comment below 🙂 .

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Sigit Prasetya Nugroho

This site is a personal Blog of Sigit Prasetya Nugroho, a Desktop developer and freelance web developer working in PHP, MySQL, WordPress.

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2 Comments

Add your comment

Frank September 28, 2015 at 5:09 pm
Thanks for this article. I am still stumped on how to get the public/private keys. I ‘thot’ I had them, but they appear to be certificate signature files (20 lines), not a normal 20-40 character string.
I got them here:
https://console.aws.amazon.com/iam/home?region=us-west-2#security_credential
- Sigit Prasetya Nugroho September 29, 2015 at 8:00 am
  sory i dont understand what you mean ? but i created new public and private key from your link, it is successful

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