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Class: Aws::WAFV2::Types::SizeConstraintStatement

Inherits:
Struct
  • Object
show all
Defined in:
(unknown)

Overview

Note:

When passing SizeConstraintStatement as input to an Aws::Client method, you can use a vanilla Hash:

{
  field_to_match: { # required
    single_header: {
      name: "FieldToMatchData", # required
    },
    single_query_argument: {
      name: "FieldToMatchData", # required
    },
    all_query_arguments: {
    },
    uri_path: {
    },
    query_string: {
    },
    body: {
    },
    method: {
    },
  },
  comparison_operator: "EQ", # required, accepts EQ, NE, LE, LT, GE, GT
  size: 1, # required
  text_transformations: [ # required
    {
      priority: 1, # required
      type: "NONE", # required, accepts NONE, COMPRESS_WHITE_SPACE, HTML_ENTITY_DECODE, LOWERCASE, CMD_LINE, URL_DECODE
    },
  ],
}

This is the latest version of AWS WAF, named AWS WAFV2, released in November, 2019. For information, including how to migrate your AWS WAF resources from the prior release, see the AWS WAF Developer Guide.

A rule statement that compares a number of bytes against the size of a request component, using a comparison operator, such as greater than (>) or less than (<). For example, you can use a size constraint statement to look for query strings that are longer than 100 bytes.

If you configure AWS WAF to inspect the request body, AWS WAF inspects only the first 8192 bytes (8 KB). If the request body for your web requests never exceeds 8192 bytes, you can create a size constraint condition and block requests that have a request body greater than 8192 bytes.

If you choose URI for the value of Part of the request to filter on, the slash (/) in the URI counts as one character. For example, the URI /logo.jpg is nine characters long.

Returned by:

Instance Attribute Summary collapse

Instance Attribute Details

#comparison_operatorString

The operator to use to compare the request part to the size setting.

Possible values:

  • EQ
  • NE
  • LE
  • LT
  • GE
  • GT

Returns:

  • (String)

    The operator to use to compare the request part to the size setting.

#field_to_matchTypes::FieldToMatch

The part of a web request that you want AWS WAF to inspect. For more information, see FieldToMatch.

Returns:

#sizeInteger

The size, in byte, to compare to the request part, after any transformations.

Returns:

  • (Integer)

    The size, in byte, to compare to the request part, after any transformations.

#text_transformationsArray<Types::TextTransformation>

Text transformations eliminate some of the unusual formatting that attackers use in web requests in an effort to bypass detection. If you specify one or more transformations in a rule statement, AWS WAF performs all transformations on the content of the request component identified by FieldToMatch, starting from the lowest priority setting, before inspecting the content for a match.

Returns:

  • (Array<Types::TextTransformation>)

    Text transformations eliminate some of the unusual formatting that attackers use in web requests in an effort to bypass detection.