---
title: NWProtocolWebSocket.Metadata
framework: network
role: symbol
role_heading: Class
path: network/nwprotocolwebsocket/metadata
---

# NWProtocolWebSocket.Metadata

A WebSocket message you configure when sending and receiving packets.

## Declaration

```swift
class Metadata
```

## Topics

### Sending Messages

- [init(opcode:)](network/nwprotocolwebsocket/metadata/init(opcode:).md)
- [NWProtocolWebSocket.Opcode](network/nwprotocolwebsocket/opcode.md)
- [setPongHandler(_:handler:)](network/nwprotocolwebsocket/metadata/setponghandler(_:handler:).md)
- [closeCode](network/nwprotocolwebsocket/metadata/closecode.md)
- [NWProtocolWebSocket.CloseCode](network/nwprotocolwebsocket/closecode.md)

### Receiving Messages

- [opcode](network/nwprotocolwebsocket/metadata/opcode.md)
- [closeCode](network/nwprotocolwebsocket/metadata/closecode.md)
- [NWProtocolWebSocket.CloseCode](network/nwprotocolwebsocket/closecode.md)

### Inspecting Handshake Results

- [selectedSubprotocol](network/nwprotocolwebsocket/metadata/selectedsubprotocol.md)
- [additionalServerHeaders](network/nwprotocolwebsocket/metadata/additionalserverheaders.md)

## Relationships

### Inherits From

- [NWProtocolMetadata](network/nwprotocolmetadata.md)

### Conforms To

- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)