Google.Protobuf.WellKnownTypes.Any
public sealed class Any : IMessage<Any>, IMessage, IEquatable<Any>, IDeepCloneable<Any>, IBufferMessage
`Any` contains an arbitrary serialized protocol buffer message along with a
URL that describes the type of the serialized message.
In its binary encoding, an `Any` is an ordinary message; but in other wire
forms like JSON, it has a special encoding. The format of the type URL is
described on the `type_url` field.
Protobuf APIs provide utilities to interact with `Any` values:
- A 'pack' operation accepts a message and constructs a generic `Any` wrapper
around it.
- An 'unpack' operation reads the content of an `Any` message, either into an
existing message or a new one. Unpack operations must check the type of the
value they unpack against the declared `type_url`.
- An 'is' operation decides whether an `Any` contains a message of the given
type, i.e. whether it can 'unpack' that type.
The JSON format representation of an `Any` follows one of these cases:
- For types without special-cased JSON encodings, the JSON format
representation of the `Any` is the same as that of the message, with an
additional `@type` field which contains the type URL.
- For types with special-cased JSON encodings (typically called 'well-known'
types, listed in https://protobuf.dev/programming-guides/json/#any), the
JSON format representation has a key `@type` which contains the type URL
and a key `value` which contains the JSON-serialized value.
The text format representation of an `Any` is like a message with one field
whose name is the type URL in brackets. For example, an `Any` containing a
`foo.Bar` message may be written `[type.googleapis.com/foo.Bar] { a: 2 }`.
Field number for the "type_url" field.
Field number for the "value" field.
Identifies the type of the serialized Protobuf message with a URI reference
consisting of a prefix ending in a slash and the fully-qualified type name.
Example: type.googleapis.com/google.protobuf.StringValue
This string must contain at least one `/` character, and the content after
the last `/` must be the fully-qualified name of the type in canonical
form, without a leading dot. Do not write a scheme on these URI references
so that clients do not attempt to contact them.
The prefix is arbitrary and Protobuf implementations are expected to
simply strip off everything up to and including the last `/` to identify
the type. `type.googleapis.com/` is a common default prefix that some
legacy implementations require. This prefix does not indicate the origin of
the type, and URIs containing it are not expected to respond to any
requests.
All type URL strings must be legal URI references with the additional
restriction (for the text format) that the content of the reference
must consist only of alphanumeric characters, percent-encoded escapes, and
characters in the following set (not including the outer backticks):
`/-.~_!$&()*+,;=`. Despite our allowing percent encodings, implementations
should not unescape them to prevent confusion with existing parsers. For
example, `type.googleapis.com%2FFoo` should be rejected.
In the original design of `Any`, the possibility of launching a type
resolution service at these type URLs was considered but Protobuf never
implemented one and considers contacting these URLs to be problematic and
a potential security issue. Do not attempt to contact type URLs.
Holds a Protobuf serialization of the type described by type_url.
public Any()
Retrieves the type name for a type URL, matching the FullName
of the packed message type.
Packs the specified message into an Any message using a type URL prefix of "type.googleapis.com".
Packs the specified message into an Any message using the specified type URL prefix.
Returns a bool indictating whether this Any message is of the target message type
Attempts to unpack the content of this Any message into the target message type,
if it matches the type URL within this Any message.
Unpacks the content of this Any message into the target message type,
which must match the type URL within this Any message.
Attempts to unpack the content of this Any message into one of the message types
in the given type registry, based on the type URL.