NodeValidatorBuilder class

Class which helps construct standard node validation policies.

By default this will not accept anything, but the 'allow*' functions can be used to expand what types of elements or attributes are allowed.

All allow functions are additive- elements will be accepted if they are accepted by any specific rule.

It is important to remember that sanitization is not just intended to prevent cross-site scripting attacks, but also to prevent information from being displayed in unexpected ways. For example something displaying basic formatted text may not expect <video> tags to appear. In this case an empty NodeValidatorBuilder with just allowTextElements might be appropriate.

Implemented types

NodeValidator

Constructors

NodeValidatorBuilder()
NodeValidatorBuilder.common(): Creates a new NodeValidatorBuilder which accepts common constructs.

Properties

hashCode → int: The hash code for this object.
read-onlyinherited
runtimeType → Type: A representation of the runtime type of the object.
read-onlyinherited

Methods

add(NodeValidator validator) → void: Add an additional validator to the current list of validators.
allowCustomElement(String tagName, {UriPolicy? uriPolicy, Iterable<String>? attributes, Iterable<String>? uriAttributes}) → void: Allow custom elements with the specified tag name and specified attributes.
allowElement(String tagName, {UriPolicy? uriPolicy, Iterable<String>? attributes, Iterable<String>? uriAttributes}) → void
allowHtml5({UriPolicy? uriPolicy}) → void: Allow common safe HTML5 elements and attributes.
allowImages([UriPolicy? uriPolicy]) → void: Allows image elements.
allowInlineStyles({String? tagName}) → void: Allow inline styles on elements.
allowNavigation([UriPolicy? uriPolicy]) → void: Allows navigation elements- Form and Anchor tags, along with common attributes.
allowsAttribute(Element element, String attributeName, String value) → bool: Returns true if the attribute is allowed.
override
allowsElement(Element element) → bool: Returns true if the tagName is an accepted type.
override
allowSvg() → void: Allow SVG elements and attributes except for known bad ones.
allowTagExtension(String tagName, String baseName, {UriPolicy? uriPolicy, Iterable<String>? attributes, Iterable<String>? uriAttributes}) → void: Allow custom tag extensions with the specified type name and specified attributes.
allowTemplating() → void: Allow templating elements (such as
allowTextElements() → void: Allow basic text elements.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
toString() → String: A string representation of this object.
inherited

Operators

operator ==(Object other) → bool: The equality operator.
inherited