Struct Headers 

pub struct Headers { /* private fields */ }

Ordered headers for requests and responses.

This preserves insertion order for fingerprinting while providing convenient lookup and mutation helpers.

Storage: Bytes for the byte buffer (refcounted, cheap to share across clones) plus Arc<Vec<HeaderSpan>> for the per-header spans (refcounted vec, cheap to share AND cheap to mutate in place when unshared via Arc::make_mut). Mutations call unshared_storage() once to obtain uniquely-owned BytesMut + Vec<HeaderSpan>; the unshared path is allocation-free, paying at most one buffer copy the first time a shared Headers is mutated after a clone.

Implementations

impl Headers

pub fn new() -> Self

pub fn from_vec(headers: Vec<(String, String)>) -> Self

pub fn from_static(headers: Vec<(&'static str, &'static str)>) -> Self

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn insert(&mut self, name: impl Into<String>, value: impl Into<String>)

Replace any existing values for name with a single new entry.

pub fn append(&mut self, name: impl Into<String>, value: impl Into<String>)

Append name: value without removing any existing entries for name.

pub fn insert_unique( &mut self, name: impl Into<String>, value: impl Into<String>, )

Append without the dedup scan that insert performs. Caller must guarantee name is not already present. Skips a linear scan over existing spans on the per-request hot path.

pub fn remove(&mut self, name: &str) -> Option<Vec<String>>

pub fn get(&self, name: &str) -> Option<&str>

pub fn get_all(&self, name: &str) -> Vec<&str>

pub fn contains(&self, name: &str) -> bool

pub fn iter_bytes(&self) -> impl Iterator<Item = (&[u8], &[u8])> + '_

pub fn iter(&self) -> impl Iterator<Item = (&str, &str)> + '_

pub fn iter_ordered(&self) -> impl Iterator<Item = (&str, &str)> + '_

pub fn extend(&mut self, other: Headers)

pub fn as_refs(&self) -> Vec<(&str, &str)>

pub fn to_vec(&self) -> Vec<(String, String)>

pub fn into_inner(self) -> Vec<(String, String)>

Trait Implementations

impl Clone for Headers

fn clone(&self) -> Headers

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Headers

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

Formats the value using the given formatter.

impl Default for Headers

fn default() -> Headers

Returns the “default value” for a type.

impl Eq for Headers

impl From<&Headers> for Headers

fn from(value: &Headers) -> Self

Converts to this type from the input type.

impl From<&Vec<(String, String)>> for Headers

fn from(value: &Vec<(String, String)>) -> Self

Converts to this type from the input type.

impl<const N: usize> From<&[(String, String); N]> for Headers

fn from(value: &[(String, String); N]) -> Self

Converts to this type from the input type.

impl From<&[(String, String)]> for Headers

fn from(value: &[(String, String)]) -> Self

Converts to this type from the input type.

impl From<HeaderMap> for Headers

fn from(map: HeaderMap) -> Self

Converts to this type from the input type.

impl From<HeadersBuilder> for Headers

fn from(builder: HeadersBuilder) -> Self

Converts to this type from the input type.

impl From<Vec<(String, String)>> for Headers

fn from(value: Vec<(String, String)>) -> Self

Converts to this type from the input type.

impl PartialEq for Headers

fn eq(&self, other: &Headers) -> 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 PartialEq<Headers> for Vec<(String, String)>

fn eq(&self, other: &Headers) -> 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 PartialEq<Vec<(String, String)>> for Headers

fn eq(&self, other: &Vec<(String, String)>) -> 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 StructuralPartialEq for Headers