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WebSocket
For Android
@kaelaela(Yuichi Maekawa)
Twitter: kaelaela31
Github: kaelaela
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Overview of WebSocket
● Bidirectional communication
● port: 80 or 443
● scheme: ws or wss
● binary support
● RFC6455
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Pros
● No request header(So, hi-Speed!)
● Real time communication
● available HTTP resource(proxy, filter, auth...)
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Cons
● Difficult error handling
● Difficult re-connection handling
● Do not control message priority
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Popular WebSocket libraries
● Socket.io
● Java-websocket
● Okhttp-ws
● java.net.Socket
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Using WebSocket with OkHttp
● Repos
https://github.com/square/okhttp/tree/master/okhttp-ws
Note: This module's API should be considered experimental
and may be subject to breaking changes in future releases.
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Using WebSocket with OkHttp
● add dependencies
※ need permission: android.permission.INTERNET
● create WebSocketListener extends class
…show my sample code.
compile 'com.squareup.okhttp3:okhttp-ws:3.4.1'
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Sample code
● Okhttp-ws: repo
Only 7 classes :-)
sample class: WebSocketEcho.java
WebSocet test: https://www.websocket.org/echo.html
● My sample
https://github.com/kaelaela/WebSockcetSample
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History of okhttp-ws
● Version 2.3.0: Beta release
● Version 2.4.0-RC1: Bug fix
● Version 2.4.0: WebSocketListener has incompatible changes.
● Version 2.6.0:
○ WebSocket API now uses RequestBody and
ResponseBody for messages.
○ Bug fix
● Version 3.1.0: WebSockets now defer some writes.
● Version 3.3.1: Bug fix
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Milestone of okhttp-ws
v3.5(Due by August 31, 2016)
● some bug fix
v3.6(Due by September 30, 2016)
● some bug fix
● status code enhancement(issue)
But, most issues are deferred. Let pray.
more information: show websocket label
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Retrofit?
maybe add v2.2!!!(No due date. 29% complete at 2016-08-21.)
● Issue #924
● Commit
interface Service {
@GET("/chat/{id}")
Call chat(@Path("id") String id);
}
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Thx ;-)
Http2? I don’t know.