[][src]Struct grpcio::Metadata

#[repr(C)]
pub struct Metadata(_);

A collection of metadata entries that can be exchanged during a call.

gRPC supports these types of metadata:

  • Request headers

    They are sent by the client at the beginning of a remote call before any request messages are sent.

  • Response headers

    They are sent by the server at the beginning of a remote call handler before any response messages are sent.

  • Response trailers

    They are sent by the server at the end of a remote call along with resulting call status.

Metadata value can be ascii string or bytes. They are distinguish by the key suffix, key of bytes value should have suffix '-bin'.

Methods

impl Metadata[src]

pub fn len(&self) -> usize[src]

Returns the count of metadata entries.

pub fn is_empty(&self) -> bool[src]

Returns true if there is no metadata entries.

pub fn get(&self, index: usize) -> Option<(&str, &[u8])>[src]

Returns the metadata entry at the index.

None is returned if out of bound.

Important traits for MetadataIter<'a>
pub fn iter(&self) -> MetadataIter[src]

Returns an iterator over the metadata entries.

Trait Implementations

impl Drop for Metadata[src]

impl<'a> IntoIterator for &'a Metadata[src]

type IntoIter = MetadataIter<'a>

Which kind of iterator are we turning this into?

type Item = (&'a str, &'a [u8])

The type of the elements being iterated over.

impl Clone for Metadata[src]

fn clone_from(&mut self, source: &Self)
1.0.0
[src]

Performs copy-assignment from source. Read more

Auto Trait Implementations

impl !Send for Metadata

impl !Sync for Metadata

Blanket Implementations

impl<T, U> Into for T where
    U: From<T>, 
[src]

impl<T> ToOwned for T where
    T: Clone
[src]

type Owned = T

impl<T> From for T[src]

impl<T, U> TryFrom for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T> Borrow for T where
    T: ?Sized
[src]

impl<T> Any for T where
    T: 'static + ?Sized
[src]

impl<T> BorrowMut for T where
    T: ?Sized
[src]

impl<T, U> TryInto for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.