CfnByteMatchSet

class aws_cdk.aws_wafregional.CfnByteMatchSet(scope, id, *, name, byte_match_tuples=None)

Bases: CfnResource

This is AWS WAF Classic documentation.

For more information, see AWS WAF Classic in the developer guide. .. epigraph:

*For the latest version of AWS WAF* , use the AWS WAF V2 API and see the `AWS WAF Developer Guide <https://docs.aws.amazon.com/waf/latest/developerguide/waf-chapter.html>`_ . With the latest version, AWS WAF has a single set of endpoints for regional and global use.

The AWS::WAFRegional::ByteMatchSet resource creates an AWS WAF ByteMatchSet that identifies a part of a web request that you want to inspect.

see:

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-wafregional-bytematchset.html

cloudformationResource:

AWS::WAFRegional::ByteMatchSet

exampleMetadata:

fixture=_generated

Example:

# The code below shows an example of how to instantiate this type.
# The values are placeholders you should change.
from aws_cdk import aws_wafregional as wafregional

cfn_byte_match_set = wafregional.CfnByteMatchSet(self, "MyCfnByteMatchSet",
    name="name",

    # the properties below are optional
    byte_match_tuples=[wafregional.CfnByteMatchSet.ByteMatchTupleProperty(
        field_to_match=wafregional.CfnByteMatchSet.FieldToMatchProperty(
            type="type",

            # the properties below are optional
            data="data"
        ),
        positional_constraint="positionalConstraint",
        text_transformation="textTransformation",

        # the properties below are optional
        target_string="targetString",
        target_string_base64="targetStringBase64"
    )]
)
Parameters:
  • scope (Construct) – Scope in which this resource is defined.

  • id (str) – Construct identifier for this resource (unique in its scope).

  • name (str) – A friendly name or description of the ByteMatchSet . You can’t change Name after you create a ByteMatchSet .

  • byte_match_tuples (Union[IResolvable, Sequence[Union[IResolvable, ByteMatchTupleProperty, Dict[str, Any]]], None]) – Specifies the bytes (typically a string that corresponds with ASCII characters) that you want AWS WAF to search for in web requests, the location in requests that you want AWS WAF to search, and other settings.

Methods

add_deletion_override(path)

Syntactic sugar for addOverride(path, undefined).

Parameters:

path (str) – The path of the value to delete.

Return type:

None

add_dependency(target)

Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.

This can be used for resources across stacks (or nested stack) boundaries and the dependency will automatically be transferred to the relevant scope.

Parameters:

target (CfnResource) –

Return type:

None

add_depends_on(target)

(deprecated) Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.

Parameters:

target (CfnResource) –

Deprecated:

use addDependency

Stability:

deprecated

Return type:

None

add_metadata(key, value)

Add a value to the CloudFormation Resource Metadata.

Parameters:
  • key (str) –

  • value (Any) –

See:

Return type:

None

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/metadata-section-structure.html

Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.

add_override(path, value)

Adds an override to the synthesized CloudFormation resource.

To add a property override, either use addPropertyOverride or prefix path with “Properties.” (i.e. Properties.TopicName).

If the override is nested, separate each nested level using a dot (.) in the path parameter. If there is an array as part of the nesting, specify the index in the path.

To include a literal . in the property name, prefix with a \. In most programming languages you will need to write this as "\\." because the \ itself will need to be escaped.

For example:

cfn_resource.add_override("Properties.GlobalSecondaryIndexes.0.Projection.NonKeyAttributes", ["myattribute"])
cfn_resource.add_override("Properties.GlobalSecondaryIndexes.1.ProjectionType", "INCLUDE")

would add the overrides Example:

"Properties": {
  "GlobalSecondaryIndexes": [
    {
      "Projection": {
        "NonKeyAttributes": [ "myattribute" ]
        ...
      }
      ...
    },
    {
      "ProjectionType": "INCLUDE"
      ...
    },
  ]
  ...
}

The value argument to addOverride will not be processed or translated in any way. Pass raw JSON values in here with the correct capitalization for CloudFormation. If you pass CDK classes or structs, they will be rendered with lowercased key names, and CloudFormation will reject the template.

Parameters:
  • path (str) –

    • The path of the property, you can use dot notation to override values in complex types. Any intermediate keys will be created as needed.

  • value (Any) –

    • The value. Could be primitive or complex.

Return type:

None

add_property_deletion_override(property_path)

Adds an override that deletes the value of a property from the resource definition.

Parameters:

property_path (str) – The path to the property.

Return type:

None

add_property_override(property_path, value)

Adds an override to a resource property.

Syntactic sugar for addOverride("Properties.<...>", value).

Parameters:
  • property_path (str) – The path of the property.

  • value (Any) – The value.

Return type:

None

apply_removal_policy(policy=None, *, apply_to_update_replace_policy=None, default=None)

Sets the deletion policy of the resource based on the removal policy specified.

The Removal Policy controls what happens to this resource when it stops being managed by CloudFormation, either because you’ve removed it from the CDK application or because you’ve made a change that requires the resource to be replaced.

The resource can be deleted (RemovalPolicy.DESTROY), or left in your AWS account for data recovery and cleanup later (RemovalPolicy.RETAIN). In some cases, a snapshot can be taken of the resource prior to deletion (RemovalPolicy.SNAPSHOT). A list of resources that support this policy can be found in the following link:

Parameters:
  • policy (Optional[RemovalPolicy]) –

  • apply_to_update_replace_policy (Optional[bool]) – Apply the same deletion policy to the resource’s “UpdateReplacePolicy”. Default: true

  • default (Optional[RemovalPolicy]) – The default policy to apply in case the removal policy is not defined. Default: - Default value is resource specific. To determine the default value for a resource, please consult that specific resource’s documentation.

See:

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-deletionpolicy.html#aws-attribute-deletionpolicy-options

Return type:

None

get_att(attribute_name, type_hint=None)

Returns a token for an runtime attribute of this resource.

Ideally, use generated attribute accessors (e.g. resource.arn), but this can be used for future compatibility in case there is no generated attribute.

Parameters:
  • attribute_name (str) – The name of the attribute.

  • type_hint (Optional[ResolutionTypeHint]) –

Return type:

Reference

get_metadata(key)

Retrieve a value value from the CloudFormation Resource Metadata.

Parameters:

key (str) –

See:

Return type:

Any

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/metadata-section-structure.html

Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.

inspect(inspector)

Examines the CloudFormation resource and discloses attributes.

Parameters:

inspector (TreeInspector) – tree inspector to collect and process attributes.

Return type:

None

obtain_dependencies()

Retrieves an array of resources this resource depends on.

This assembles dependencies on resources across stacks (including nested stacks) automatically.

Return type:

List[Union[Stack, CfnResource]]

obtain_resource_dependencies()

Get a shallow copy of dependencies between this resource and other resources in the same stack.

Return type:

List[CfnResource]

override_logical_id(new_logical_id)

Overrides the auto-generated logical ID with a specific ID.

Parameters:

new_logical_id (str) – The new logical ID to use for this stack element.

Return type:

None

remove_dependency(target)

Indicates that this resource no longer depends on another resource.

This can be used for resources across stacks (including nested stacks) and the dependency will automatically be removed from the relevant scope.

Parameters:

target (CfnResource) –

Return type:

None

replace_dependency(target, new_target)

Replaces one dependency with another.

Parameters:
Return type:

None

to_string()

Returns a string representation of this construct.

Return type:

str

Returns:

a string representation of this resource

Attributes

CFN_RESOURCE_TYPE_NAME = 'AWS::WAFRegional::ByteMatchSet'
attr_id

Id

Type:

cloudformationAttribute

byte_match_tuples

Specifies the bytes (typically a string that corresponds with ASCII characters) that you want AWS WAF to search for in web requests, the location in requests that you want AWS WAF to search, and other settings.

cfn_options

Options for this resource, such as condition, update policy etc.

cfn_resource_type

AWS resource type.

creation_stack

return:

the stack trace of the point where this Resource was created from, sourced from the +metadata+ entry typed +aws:cdk:logicalId+, and with the bottom-most node +internal+ entries filtered.

logical_id

The logical ID for this CloudFormation stack element.

The logical ID of the element is calculated from the path of the resource node in the construct tree.

To override this value, use overrideLogicalId(newLogicalId).

Returns:

the logical ID as a stringified token. This value will only get resolved during synthesis.

name

A friendly name or description of the ByteMatchSet .

node

The tree node.

ref

Return a string that will be resolved to a CloudFormation { Ref } for this element.

If, by any chance, the intrinsic reference of a resource is not a string, you could coerce it to an IResolvable through Lazy.any({ produce: resource.ref }).

stack

The stack in which this element is defined.

CfnElements must be defined within a stack scope (directly or indirectly).

Static Methods

classmethod is_cfn_element(x)

Returns true if a construct is a stack element (i.e. part of the synthesized cloudformation template).

Uses duck-typing instead of instanceof to allow stack elements from different versions of this library to be included in the same stack.

Parameters:

x (Any) –

Return type:

bool

Returns:

The construct as a stack element or undefined if it is not a stack element.

classmethod is_cfn_resource(x)

Check whether the given object is a CfnResource.

Parameters:

x (Any) –

Return type:

bool

classmethod is_construct(x)

Checks if x is a construct.

Use this method instead of instanceof to properly detect Construct instances, even when the construct library is symlinked.

Explanation: in JavaScript, multiple copies of the constructs library on disk are seen as independent, completely different libraries. As a consequence, the class Construct in each copy of the constructs library is seen as a different class, and an instance of one class will not test as instanceof the other class. npm install will not create installations like this, but users may manually symlink construct libraries together or use a monorepo tool: in those cases, multiple copies of the constructs library can be accidentally installed, and instanceof will behave unpredictably. It is safest to avoid using instanceof, and using this type-testing method instead.

Parameters:

x (Any) – Any object.

Return type:

bool

Returns:

true if x is an object created from a class which extends Construct.

ByteMatchTupleProperty

class CfnByteMatchSet.ByteMatchTupleProperty(*, field_to_match, positional_constraint, text_transformation, target_string=None, target_string_base64=None)

Bases: object

This is AWS WAF Classic documentation.

For more information, see AWS WAF Classic in the developer guide. .. epigraph:

*For the latest version of AWS WAF* , use the AWS WAF V2 API and see the `AWS WAF Developer Guide <https://docs.aws.amazon.com/waf/latest/developerguide/waf-chapter.html>`_ . With the latest version, AWS WAF has a single set of endpoints for regional and global use.

The bytes (typically a string that corresponds with ASCII characters) that you want AWS WAF to search for in web requests, the location in requests that you want AWS WAF to search, and other settings.

Attributes

field_to_match

The part of a web request that you want AWS WAF to inspect, such as a specific header or a query string.

See:

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-wafregional-bytematchset-bytematchtuple.html#cfn-wafregional-bytematchset-bytematchtuple-fieldtomatch

positional_constraint

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:

CONTAINS

The specified part of the web request must include the value of TargetString , but the location doesn’t matter.

CONTAINS_WORD

The specified part of the web request must include the value of TargetString , and TargetString must contain only alphanumeric characters or underscore (A-Z, a-z, 0-9, or _). In addition, TargetString must be a word, which means one of the following:

  • TargetString exactly matches the value of the specified part of the web request, such as the value of a header.

  • TargetString is at the beginning of the specified part of the web request and is followed by a character other than an alphanumeric character or underscore (_), for example, BadBot; .

  • TargetString is at the end of the specified part of the web request and is preceded by a character other than an alphanumeric character or underscore (_), for example, ;BadBot .

  • TargetString is in the middle of the specified part of the web request and is preceded and followed by characters other than alphanumeric characters or underscore (_), for example, -BadBot; .

EXACTLY

The value of the specified part of the web request must exactly match the value of TargetString .

STARTS_WITH

The value of TargetString must appear at the beginning of the specified part of the web request.

ENDS_WITH

The value of TargetString must appear at the end of the specified part of the web request.

See:

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-wafregional-bytematchset-bytematchtuple.html#cfn-wafregional-bytematchset-bytematchtuple-positionalconstraint

target_string

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.

You must specify this property or the TargetStringBase64 property.

Valid values depend on the values that you specified for FieldToMatch :

  • HEADER : The value that you want AWS WAF to search for in the request header that you specified in FieldToMatch , for example, the value of the User-Agent or Referer header.

  • METHOD : The HTTP method, which indicates the type of operation specified in the request.

  • QUERY_STRING : The value that you want AWS WAF to search for in the query string, which is the part of a URL that appears after a ? character.

  • URI : The value that you want AWS WAF to search for in the part of a URL that identifies a resource, for example, /images/daily-ad.jpg .

  • BODY : The part of a request that contains any additional data that you want to send to your web server as the HTTP request body, such as data from a form. The request body immediately follows the request headers. Note that only the first 8192 bytes of the request body are forwarded to AWS WAF for inspection. To allow or block requests based on the length of the body, you can create a size constraint set.

  • SINGLE_QUERY_ARG : The parameter in the query string that you will inspect, such as UserName or SalesRegion . The maximum length for SINGLE_QUERY_ARG is 30 characters.

  • ALL_QUERY_ARGS : Similar to SINGLE_QUERY_ARG , but instead of inspecting a single parameter, AWS WAF inspects all parameters within the query string for the value or regex pattern that you specify in TargetString .

If TargetString includes alphabetic characters A-Z and a-z, note that the value is case sensitive.

See:

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-wafregional-bytematchset-bytematchtuple.html#cfn-wafregional-bytematchset-bytematchtuple-targetstring

target_string_base64

The base64-encoded value that AWS WAF searches for. AWS CloudFormation sends this value to AWS WAF without encoding it.

You must specify this property or the TargetString property.

AWS WAF searches for this value in a specific part of web requests, which you define in the FieldToMatch property.

Valid values depend on the Type value in the FieldToMatch property. For example, for a METHOD type, you must specify HTTP methods such as DELETE, GET, HEAD, OPTIONS, PATCH, POST , and PUT .

See:

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-wafregional-bytematchset-bytematchtuple.html#cfn-wafregional-bytematchset-bytematchtuple-targetstringbase64

text_transformation

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.

You can only specify a single type of TextTransformation.

CMD_LINE

When you’re concerned that attackers are injecting an operating system command line command and using unusual formatting to disguise some or all of the command, use this option to perform the following transformations:

  • Delete the following characters: “ ‘ ^

  • Delete spaces before the following characters: / (

  • Replace the following characters with a space: , ;

  • Replace multiple spaces with one space

  • Convert uppercase letters (A-Z) to lowercase (a-z)

COMPRESS_WHITE_SPACE

Use this option to replace the following characters with a space character (decimal 32):

  • f, formfeed, decimal 12

  • t, tab, decimal 9

  • n, newline, decimal 10

  • r, carriage return, decimal 13

  • v, vertical tab, decimal 11

  • non-breaking space, decimal 160

COMPRESS_WHITE_SPACE also replaces multiple spaces with one space.

HTML_ENTITY_DECODE

Use this option to replace HTML-encoded characters with unencoded characters. HTML_ENTITY_DECODE performs the following operations:

  • Replaces (ampersand)quot; with "

  • Replaces (ampersand)nbsp; with a non-breaking space, decimal 160

  • Replaces (ampersand)lt; with a “less than” symbol

  • Replaces (ampersand)gt; with >

  • Replaces characters that are represented in hexadecimal format, (ampersand)#xhhhh; , with the corresponding characters

  • Replaces characters that are represented in decimal format, (ampersand)#nnnn; , with the corresponding characters

LOWERCASE

Use this option to convert uppercase letters (A-Z) to lowercase (a-z).

URL_DECODE

Use this option to decode a URL-encoded value.

NONE

Specify NONE if you don’t want to perform any text transformations.

See:

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-wafregional-bytematchset-bytematchtuple.html#cfn-wafregional-bytematchset-bytematchtuple-texttransformation

FieldToMatchProperty

class CfnByteMatchSet.FieldToMatchProperty(*, type, data=None)

Bases: object

This is AWS WAF Classic documentation.

For more information, see AWS WAF Classic in the developer guide. .. epigraph:

*For the latest version of AWS WAF* , use the AWS WAF V2 API and see the `AWS WAF Developer Guide <https://docs.aws.amazon.com/waf/latest/developerguide/waf-chapter.html>`_ . With the latest version, AWS WAF has a single set of endpoints for regional and global use.

Specifies where in a web request to look for TargetString .

Attributes

data

When the value of Type is HEADER , enter the name of the header that you want AWS WAF to search, for example, User-Agent or Referer .

The name of the header is not case sensitive.

When the value of Type is SINGLE_QUERY_ARG , enter the name of the parameter that you want AWS WAF to search, for example, UserName or SalesRegion . The parameter name is not case sensitive.

If the value of Type is any other value, omit Data .

See:

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-wafregional-bytematchset-fieldtomatch.html#cfn-wafregional-bytematchset-fieldtomatch-data

type

The part of the web request that you want AWS WAF to search for a specified string.

Parts of a request that you can search include the following:

  • HEADER : A specified request header, for example, the value of the User-Agent or Referer header. If you choose HEADER for the type, specify the name of the header in Data .

  • METHOD : The HTTP method, which indicated the type of operation that the request is asking the origin to perform.

  • QUERY_STRING : A query string, which is the part of a URL that appears after a ? character, if any.

  • URI : The part of a web request that identifies a resource, for example, /images/daily-ad.jpg .

  • BODY : The part of a request that contains any additional data that you want to send to your web server as the HTTP request body, such as data from a form. The request body immediately follows the request headers. Note that only the first 8192 bytes of the request body are forwarded to AWS WAF for inspection. To allow or block requests based on the length of the body, you can create a size constraint set.

  • SINGLE_QUERY_ARG : The parameter in the query string that you will inspect, such as UserName or SalesRegion . The maximum length for SINGLE_QUERY_ARG is 30 characters.

  • ALL_QUERY_ARGS : Similar to SINGLE_QUERY_ARG , but rather than inspecting a single parameter, AWS WAF will inspect all parameters within the query for the value or regex pattern that you specify in TargetString .

See:

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-wafregional-bytematchset-fieldtomatch.html#cfn-wafregional-bytematchset-fieldtomatch-type