ETag class final

Represents an HTTP ETag entity tag for conditional requests.

An ETag is a string that uniquely identifies a specific version of a resource. It can be either strong (exact match required) or weak (semantic equivalence).

Example

final etag = ETag('abc123', false);
final weakEtag = ETag('xyz', true);
final wildcard = ETag.wildcard;

Constructors

ETag(String tag, bool weak): Creates a new ETag instance.

Properties

hashCode → int: The hash code for this object.
no setterinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
tag → String: The unquoted entity tag value.
final
weak → bool: Whether the ETag is weak.
final

Methods

compare(ETag other, bool strong) → bool: Performs a comparison between this ETag and another ETag.
equalizedProperties() → List<Object?>: Mixin-style contract for value-based equality, hashCode, and toString.
getFormattedTag() → String: Returns the fully formatted ETag, including the W/ prefix for weak ETags and quotes around the tag value.
isWildcard() → bool: Returns true if this ETag is a wildcard.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
toString() → String: A string representation of this object.
override

Operators

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

Static Properties

wildcard → ETag: Wildcard ETag matching any entity tag value.
final

Static Methods

create(String rawValue) → ETag: Creates an ETag instance from a formatted string.
parse(String source) → List<ETag>: Parses multiple ETags from an If-Match or If-None-Match HTTP header.
quoteETagIfNecessary(String tag) → String: Wraps an ETag string in quotes if necessary.