Enum DomainNameError 

#[non_exhaustive]
pub enum DomainNameError {
    Empty,
    TooLong(usize),
    LabelTooLong {
        label: usize,
        len: usize,
    },
    InvalidLabelStart(char),
    InvalidLabelEnd(char),
    InvalidChar(char),
    EmptyLabel,
}

Available on crate feature net only.

Error type for domain name validation.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Empty

Empty domain name

The provided string is empty. Domain names must contain at least one character.

TooLong(usize)

Domain name exceeds maximum length of 253 characters

According to RFC 1035, domain names must not exceed 253 characters. This variant contains the actual length of the provided domain name.

LabelTooLong

Label exceeds maximum length of 63 characters

Each label (segment separated by dots) must not exceed 63 characters. This variant contains the label index and its actual length.

Fields

label: usize

Label index

len: usize

Label length

InvalidLabelStart(char)

Label starts with invalid character

Labels must start with an alphanumeric character (letter or digit). Hyphens are not allowed as the first character. This variant contains the invalid character.

InvalidLabelEnd(char)

Label ends with invalid character

Labels must end with an alphanumeric character (letter or digit). Hyphens are not allowed as the last character. This variant contains the invalid character.

InvalidChar(char)

Invalid character in domain name

Domain names can only contain ASCII letters, digits, and hyphens. This variant contains the invalid character.

EmptyLabel

Empty label (consecutive dots or leading/trailing dots)

Consecutive dots (e.g., “example..com”) or leading/trailing dots (e.g., “.example.com” or “example.com.”) are not allowed.

Trait Implementations

impl Clone for DomainNameError

fn clone(&self) -> DomainNameError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DomainNameError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DomainNameError

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for DomainNameError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for DomainNameError

Available on crate feature std only.

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for DomainNameError

fn eq(&self, other: &DomainNameError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for DomainNameError

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for DomainNameError

impl Eq for DomainNameError

impl StructuralPartialEq for DomainNameError