This is AWS WAF Classic documentation. For more information, see
AWS WAF Classic
in the developer guide.
For the latest version of AWS WAF, use the AWS WAFV2 API and see the
AWS WAF Developer Guide.
With the latest version, AWS WAF has a single set of endpoints for
regional and global use.
Creates a SizeConstraintSet
. You then use UpdateSizeConstraintSet to
identify the part of a web request that you want AWS WAF to check for
length, such as the length of the User-Agent
header or the length of
the query string. For example, you can create a SizeConstraintSet
that
matches any requests that have a query string that is longer than 100
bytes. You can then configure AWS WAF to reject those requests.
To create and configure a SizeConstraintSet
, perform the following
steps:
Use GetChangeToken to get the change token that you provide in the
ChangeToken
parameter of a CreateSizeConstraintSet
request.
Submit a CreateSizeConstraintSet
request.
Use GetChangeToken
to get the change token that you provide in the
ChangeToken
parameter of an UpdateSizeConstraintSet
request.
Submit an UpdateSizeConstraintSet request to specify the part of the
request that you want AWS WAF to inspect (for example, the header or
the URI) and the value that you want AWS WAF to watch for.
For more information about how to use the AWS WAF API to allow or block
HTTP requests, see the AWS WAF Developer Guide.