uniws

Documentation

Index

• Constants
• func NewCancelContext(ctx context.Context, ch <-chan struct{}) context.Context
• type Config
• type ConnectRequest
• type Handler
  • func NewHandler(n *centrifuge.Node, c Config) *Handler
  • func (s *Handler) ServeHTTP(rw http.ResponseWriter, r *http.Request)
• type SubscribeRequest

Constants

const (
	DefaultWebsocketPingInterval     = 25 * time.Second
	DefaultWebsocketWriteTimeout     = 1 * time.Second
	DefaultWebsocketMessageSizeLimit = 65536 // 64KB
)

Defaults.

Functions

func NewCancelContext

func NewCancelContext(ctx context.Context, ch <-chan struct{}) context.Context

NewCancelContext returns a wrapper context around original context that will be canceled on channel close.

Types

type Config

type Config struct {
	// CompressionLevel sets a level for websocket compression.
	// See possible value description at https://golang.org/pkg/compress/flate/#NewWriter
	CompressionLevel int

	// CompressionMinSize allows to set minimal limit in bytes for
	// message to use compression when writing it into client connection.
	// By default, it's 0 - i.e. all messages will be compressed when
	// WebsocketCompression enabled and compression negotiated with client.
	CompressionMinSize int

	// ReadBufferSize is a parameter that is used for raw websocket Upgrader.
	// If set to zero reasonable default value will be used.
	ReadBufferSize int

	// WriteBufferSize is a parameter that is used for raw websocket Upgrader.
	// If set to zero reasonable default value will be used.
	WriteBufferSize int

	// MessageSizeLimit sets the maximum size in bytes of allowed message from client.
	// By default, DefaultWebsocketMaxMessageSize will be used.
	MessageSizeLimit int

	// CheckOrigin func to provide custom origin check logic.
	// nil means allow all origins.
	CheckOrigin func(r *http.Request) bool

	// WriteTimeout is maximum time of write message operation.
	// Slow client will be disconnected.
	// By default, DefaultWebsocketWriteTimeout will be used.
	WriteTimeout time.Duration

	// Compression allows to enable websocket permessage-deflate
	// compression support for raw websocket connections. It does
	// not guarantee that compression will be used - i.e. it only
	// says that server will try to negotiate it with client.
	Compression bool

	// UseWriteBufferPool enables using buffer pool for writes.
	UseWriteBufferPool bool

	centrifuge.PingPongConfig
}

Config represents config for Handler.

type ConnectRequest

type ConnectRequest struct {
	Token   string                       `json:"token,omitempty"`
	Data    json.RawMessage              `json:"data,omitempty"`
	Subs    map[string]*SubscribeRequest `json:"subs,omitempty"`
	Name    string                       `json:"name,omitempty"`
	Version string                       `json:"version,omitempty"`
}

type Handler

type Handler struct {
	// contains filtered or unexported fields
}

Handler handles WebSocket client connections. Usually WebSocket protocol is a bidirectional connection between a client and a server for low-latency communication. Here we utilize only one direction - giving users an additional option for unidirectional transport.

func NewHandler

func NewHandler(n *centrifuge.Node, c Config) *Handler

NewHandler creates new Handler.

func (*Handler) ServeHTTP

func (s *Handler) ServeHTTP(rw http.ResponseWriter, r *http.Request)

type SubscribeRequest

type SubscribeRequest struct {
	Recover bool   `json:"recover,omitempty"`
	Epoch   string `json:"epoch,omitempty"`
	Offset  uint64 `json:"offset,omitempty"`
}