Struct Headers

pub struct Headers(pub Headers);

A Headers representation used in Request and Response objects.

Tuple Fields

0: Headers

Implementations

impl Headers

pub fn new() -> Self

Construct a new Headers struct.

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

Returns all the values of a header within a Headers object with a given name. Returns an error if the name is invalid (e.g. contains spaces)

pub fn has(&self, name: &str) -> Result<bool>

Returns a boolean stating whether a Headers object contains a certain header. Returns an error if the name is invalid (e.g. contains spaces)

pub fn append(&self, name: &str, value: &str) -> Result<()>

Returns an error if the name is invalid (e.g. contains spaces)

pub fn set(&self, name: &str, value: &str) -> Result<()>

Sets a new value for an existing header inside a Headers object, or adds the header if it does not already exist. Returns an error if the name is invalid (e.g. contains spaces)

pub fn delete(&self, name: &str) -> Result<()>

Deletes a header from a Headers object. Returns an error if the name is invalid (e.g. contains spaces) or if the JS Headers object’s guard is immutable (e.g. for an incoming request)

pub fn entries( &self, ) -> Map<Map<IntoIter, fn(Result<JsValue, JsValue>) -> Array>, fn(Array) -> (String, String)>

Returns an iterator allowing to go through all key/value pairs contained in this object.

pub fn keys(&self) -> impl Iterator<Item = String>

Returns an iterator allowing you to go through all keys of the key/value pairs contained in this object.

pub fn values(&self) -> impl Iterator<Item = String>

Returns an iterator allowing you to go through all values of the key/value pairs contained in this object.

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

Returns all the values of a header within a Headers object with a given name.

Trait Implementations

impl AsRef<JsValue> for Headers

fn as_ref(&self) -> &JsValue

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for Headers

fn clone(&self) -> Self

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() -> Self

Returns the “default value” for a type.

impl From<&HeaderMap> for Headers

fn from(map: &HeaderMap) -> Self

Converts to this type from the input type.

impl From<&Headers> for HeaderMap

fn from(headers: &Headers) -> 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<Headers> for HeaderMap

fn from(headers: Headers) -> Self

Converts to this type from the input type.

impl<'a, T: AsRef<str>> FromIterator<&'a (T, T)> for Headers

fn from_iter<U: IntoIterator<Item = &'a (T, T)>>(iter: U) -> Self

Creates a value from an iterator.

impl<T: AsRef<str>> FromIterator<(T, T)> for Headers

fn from_iter<U: IntoIterator<Item = (T, T)>>(iter: U) -> Self

Creates a value from an iterator.

impl IntoIterator for &Headers

type Item = (String, String)

The type of the elements being iterated over.

type IntoIter = Map<Map<IntoIter, fn(Result<JsValue, JsValue>) -> Array>, fn(Array) -> (String, String)>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.