Class: AWS::PAAPI

Inherits:
Object
  • Object
show all
Defined in:
lib/aws/pa_api.rb

Defined Under Namespace

Classes: Market

Constant Summary collapse

MARKETS = 
{
	au: Market.new('webservices.amazon.com.au', 'us-west-2'),
	br: Market.new('webservices.amazon.com.br'  'us-east-1'),
	ca: Market.new('webservices.amazon.ca',     'us-east-1'),
	fr: Market.new('webservices.amazon.fr',     'eu-west-1'),
	de: Market.new('webservices.amazon.de',     'eu-west-1'),
	in: Market.new('webservices.amazon.in',     'eu-west-1'),
	it: Market.new('webservices.amazon.it',     'eu-west-1'),
	jp: Market.new('webservices.amazon.co.jp',  'us-west-2'),
	mx: Market.new('webservices.amazon.com.mx', 'us-east-1'),
	es: Market.new('webservices.amazon.es',     'eu-west-1'),
	tr: Market.new('webservices.amazon.com.tr', 'eu-west-1'),
	ae: Market.new('webservices.amazon.ae',     'eu-west-1'),
	uk: Market.new('webservices.amazon.co.uk',  'eu-west-1'),
	us: Market.new('webservices.amazon.com',    'us-east-1'),
}.freeze

Instance Method Summary collapse

Constructor Details

#initialize(access_key, secret_key, partner_tag) ⇒ PAAPI

Returns a new instance of PAAPI.



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# File 'lib/aws/pa_api.rb', line 25

def initialize(access_key, secret_key, partner_tag)
	@access_key, @secret_key, @partner_tag = access_key, secret_key, partner_tag
end

Instance Method Details

#get_items(asin, locale) ⇒ Object 



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# File 'lib/aws/pa_api.rb', line 29

def get_items(asin, locale)
	asin = isbn13to10(asin) if asin.length == 13
	payload = {
		"PartnerTag" => @partner_tag,
		"PartnerType" => "Associates",
		"Marketplace" => MARKETS[locale].host.sub('webservices', 'www'),
		"ItemIds" => [asin],
		"Resources" => [
			"Images.Primary.Small",
			"Images.Primary.Medium",
			"Images.Primary.Large",
			"ItemInfo.ByLineInfo",
			"ItemInfo.Title",
			"Offers.Listings.Price"
		]
	}.to_json
	time_stamp = Time.now.utc.strftime("%Y%m%dT%H%M%SZ")
	signature = AWS::SigV4.signature(@secret_key, time_stamp, MARKETS[locale].region, MARKETS[locale].host, payload)
	authorization = "AWS4-HMAC-SHA256 Credential=#{@access_key}/#{time_stamp[0,8]}/#{MARKETS[locale].region}/ProductAdvertisingAPI/aws4_request, SignedHeaders=content-encoding;host;x-amz-content-sha256;x-amz-date;x-amz-target, Signature=#{signature}"

	headers = {
		"X-Amz-Target" => "com.amazon.paapi5.v1.ProductAdvertisingAPIv1.GetItems",
		"Content-Encoding" => "amz-1.0",
		"Host" => MARKETS[locale].host,
		"X-Amz-Date" => time_stamp,
		"X-Amz-Content-Sha256" => OpenSSL::Digest::SHA256.hexdigest(payload),
		"Authorization" => authorization,
		"Content-Type" => "application/json; charset=utf-8"
	}
	uri = URI("https://#{MARKETS[locale].host}/paapi5/getitems")
	http = Net::HTTP.new(uri.host, uri.port)
	http.use_ssl = true
	response = http.post(uri.path, payload, headers)
	response.value # raise on errors
	return response.body
end