If the customer, however, wants to remove only some of the items in their cart, use
CartModify
and set
the
Quantity
and
CartItemId
parameters appropriately, for example:
http://webservices.amazon.com/onca/xml?
Service=AWSECommerceService&
AWSAccessKeyId=
[AWS Access Key ID]
&
Operation=CartModify&
CartId=
[cart ID]
&
Item.1.CartItemId=U1I8M9790QFDO7&
Item.1.Quantity=15&
Item.2.CartItemId=U3K5GRHEXU6FHK&
Item.2.Quantity=18
&Timestamp=[YYYY-MM-DDThh:mm:ssZ]
&Signature=[Request Signature]
This request sets the quantity of the item specified by the
CartItemId
to 0 thereby removing it from the
cart.
Retrieving the Contents of a Cart
You should not maintain a local copy of the remote shopping cart. Instead, use
CartGet
to retrieve the
items in a shopping cart.
Retrieving the items in a cart
• Use the cart's
HMAC
and
CartId
values in a
CartGet
request.
http://webservices.amazon.com/onca/xml?
Service=AWSECommerceService&
AWSAccessKeyId=
[AWS Access Key ID]
&
AssociateTag=ws&
Operation=CartGet&
CartId=002-2041347-9034467&
HMAC=
[HMAC]
&Timestamp=[YYYY-MM-DDThh:mm:ssZ]
&Signature=[Request Signature]
By default,
CartGet
uses the Cart response group. This response group provides a lot of information
about items, including, for example, their price, quantity, and the seller ID of the seller selling the item,
as shown in the following response snippet.
<PurchaseURL>https://www.amazon.com/gp/cart/aws-merge.html?cart-id=002-9918938-
1696046%26associate-id=ws%26hmac=b0ogzvivVYLXjSZ9WwoBRFesFYU=%26AWSAccessKey
Id=
[AWS Access Key ID]
</PurchaseURL>
<CartItems>
<SubTotal>
<Amount>1994</Amount>
<CurrencyCode>USD</CurrencyCode>
<FormattedPrice>$19.94</FormattedPrice>
</SubTotal>
<CartItem>
API Version 2011-08-01
145
Product Advertising API Developer Guide
Remote Shopping Cart Tasks
