func buildUpgradeResponse(channel: Channel, upgradeRequest: HTTPRequestHead, initialResponseHeaders: HTTPHeaders) -> EventLoopFuture<HTTPHeaders> s12NIOWebSocket011NIOTypedWebB14ServerUpgraderC20buildUpgradeResponse7channel14upgradeRequest07initialI7Headers7NIOCore15EventLoopFutureCy8NIOHTTP111HTTPHeadersVGAH7Channel_p_AK15HTTPRequestHeadVAMtF What are these?4DBA9import NIOWebSocketfinal class NIOTypedWebSocketServerUpgrader<UpgradeResult> where UpgradeResult : SendableA NIOTypedHTTPServerProtocolUpgrader that knows how to do the WebSocket upgrade dance.
protocol Channel : AnyObject, ChannelOutboundInvoker, _NIOPreconcurrencySendableA Channel is easiest thought of as a network socket. But it can be anything that is capable of I/O operations such as read, write, connect, and bind.
struct HTTPRequestHeadA representation of the request line and header fields of a HTTP request.
struct HTTPHeadersA representation of a block of HTTP header fields.
final class EventLoopFuture<Value>Holder for a result that will be provided later.
init(maxFrameSize: Int = 1 << 14, enableAutomaticErrorHandling: Bool = true, shouldUpgrade: @escaping (Channel, HTTPRequestHead) -> EventLoopFuture<HTTPHeaders?>, upgradePipelineHandler: @escaping (Channel, HTTPRequestHead) -> EventLoopFuture<UpgradeResult>) Create a new NIOTypedWebSocketServerUpgrader.
let requiredUpgradeHeaders: [String]We deliberately do not actually set any required headers here, because the websocket spec annoyingly does not actually force the client to send these in the Upgrade header, which NIO requires. We check for these manually.
let supportedProtocol: StringRFC 6455 specs this as the required entry in the Upgrade header.
func upgrade(channel: Channel, upgradeRequest: HTTPRequestHead) -> EventLoopFuture<UpgradeResult>