Within the portion of a web request that you want to search (for example, in
the query string, if any), specify where you want AWS WAF to search. Valid
values include the following:
The value that you want AWS WAF to search for. AWS WAF searches for the
specified string in the part of web requests that you specified in
FieldToMatch. The maximum length of the value is 50 bytes.
Text transformations eliminate some of the unusual formatting that attackers
use in web requests in an effort to bypass AWS WAF. If you specify a
transformation, AWS WAF performs the transformation on
FieldToMatch before inspecting it for a match.