Module tonic::metadata

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Contains data structures and utilities for handling gRPC custom metadata.

Modules§

  • errors
    The metadata::errors module contains types for errors that can occur while handling gRPC custom metadata.

Structs§

  • GetAll
    A view to all values stored in a single entry.
  • Iter
    MetadataMap entry iterator.
  • IterMut
    MetadataMap entry iterator.
  • Keys
    An iterator over MetadataMap keys.
  • MetadataKey
    Represents a custom metadata field name.
  • MetadataMap
    A set of gRPC custom metadata entries.
  • MetadataValue
    Represents a custom metadata field value.
  • OccupiedEntry
    A view into a single occupied location in a MetadataMap.
  • VacantEntry
    A view into a single empty location in a MetadataMap.
  • ValueDrain
    A drain iterator of all values associated with a single metadata key.
  • ValueIter
    An iterator of all values associated with a single metadata key.
  • Values
    MetadataMap value iterator.
  • ValuesMut
    MetadataMap value iterator.

Enums§

  • Ascii
    gRPC metadata values can be either ASCII strings or binary. Note that only visible ASCII characters (32-127) are permitted. This type should never be instantiated – in fact, it’s impossible to, because there’s no variants to instantiate. Instead, it’s just used as a type parameter for MetadataKey and MetadataValue.
  • Binary
    gRPC metadata values can be either ASCII strings or binary. This type should never be instantiated – in fact, it’s impossible to, because there’s no variants to instantiate. Instead, it’s just used as a type parameter for MetadataKey and MetadataValue.
  • Entry
    A view into a single location in a MetadataMap, which may be vacant or occupied.
  • KeyAndMutValueRef
    Reference to a key and an associated value in a MetadataMap. It can point to either an ascii or a binary (“*-bin”) key.
  • KeyAndValueRef
    Reference to a key and an associated value in a MetadataMap. It can point to either an ascii or a binary (“*-bin”) key.
  • KeyRef
    Reference to a key in a MetadataMap. It can point to either an ascii or a binary (“*-bin”) key.
  • ValueRef
    Reference to a value in a MetadataMap. It can point to either an ascii or a binary (“*-bin” key) value.
  • ValueRefMut
    Reference to a value in a MetadataMap. It can point to either an ascii or a binary (“*-bin” key) value.

Type Aliases§