Network.Wai.EventSource

A WAI adapter to the HTML5 Server-Sent Events API.

If running through a proxy like Nginx you might need to add the headers:

[ ("X-Accel-Buffering", "no"), ("Cache-Control", "no-cache")]

Documentation

data ServerEvent

Type representing a communication over an event stream. This can be an actual event, a comment, a modification to the retry timer, or a special "close" event indicating the server should close the connection.

Constructors

ServerEvent

Fields

• eventName :: Maybe Builder
• eventId :: Maybe Builder
• eventData :: [Builder]

CommentEvent

Fields

• eventComment :: Builder

RetryEvent

Fields

• eventRetry :: Int

CloseEvent

eventSourceAppChan :: Chan ServerEvent -> Application

Make a new WAI EventSource application reading events from the given channel.

eventSourceAppIO :: IO ServerEvent -> Application

Make a new WAI EventSource application reading events from the given IO action.