firebase::messaging::Message

The collapse key used for collapsible messages.

This field is only used for downstream messages received through Listener::OnMessage().

The metadata, including all original key/value pairs.

Includes some of the HTTP headers used when sending the message. gcm, google and goog prefixes are reserved for internal use.

This field is used for both upstream messages sent with firebase::messaging::Send() and downstream messages received through Listener::OnMessage().

Error code.

Used in "nack" messages for CCS, and in responses from the server. See the CCS specification for the externally-supported list.

This field is only used for downstream messages received through Listener::OnMessage().

Human readable details about the error.

This field is only used for downstream messages received through Listener::OnMessage().

Authenticated ID of the sender.

This is a project number in most cases.

This field is only used for downstream messages received through Listener::OnMessage().

Message ID.

This can be specified by sender. Internally a hash of the message ID and other elements will be used for storage. The ID must be unique for each topic subscription - using the same ID may result in overriding the original message or duplicate delivery.

This field is used for both upstream messages sent with firebase::messaging::Send() and downstream messages received through Listener::OnMessage().

Equivalent with a content-type.

CCS uses "ack", "nack" for flow control and error handling. "control" is used by CCS for connection control.

This field is only used for downstream messages received through Listener::OnMessage().

Optional notification to show.

This only set if a notification was received with this message, otherwise it is null.

The notification is only guaranteed to be valid during the call to Listener::OnMessage(). If you need to keep it around longer you will need to make a copy of either the Message or Notification. Copying the Message object implicitly makes a deep copy of the notification (allocated with new) which is owned by the Message.

This field is only used for downstream messages received through Listener::OnMessage().

Priority level.

Defines values are "normal" and "high". By default messages are sent with normal priority.

This field is only used for downstream messages received through Listener::OnMessage().

Binary payload.

For webpush and non-json messages, this is the body of the request entity.

This field is only used for downstream messages received through Listener::OnMessage().

Time to live, in seconds.

This field is only used for downstream messages received through Listener::OnMessage().

This parameter specifies the recipient of a message.

For example it can be a registration token, a topic name, a IID or project ID.

This field is used for both upstream messages sent with firebase::messaging:Send() and downstream messages received through Listener::OnMessage(). For upstream messages, [email protected] or the more general IID format are accepted.

Initialize the message.

Copy constructor. Makes a deep copy of this Message.

Copy assignment operator. Makes a deep copy of this Message.

Destructor.