［已解决］websocket过了段时间就收不到消息了

iOS的swift中的websocket用的库是：starscream。

用websocket接收消息，刚开始连接后，收发消息一直是正常的。

但是过了段时间，大概不到10分钟，然后就无法正常接收到，别的（web）端发送到消息了

然后后来发现android端也出现类似问题：web socket的disconnect也没有监听到

然后也是过了段时间就收不到消息了

搜：

websocket ios not receive

服务器端，默认的设置是：3600000毫秒

搜：

session timeout设置

请教：如何设置session的超时时间，它的默认超时时间是多少？谢谢！！！-CSDN论坛-CSDN.NET-中国最大的IT技术社区

介绍设置Session失效的几种方法 – 51CTO.COM

Java Web开发Session超时设置 – 我的IT技术杂谈 – ITeye技术网站

starscream websocket

daltoniam/Starscream: Websockets in swift for iOS and OSX

后来发现是服务器端，web socket出现异常：EOF

然后好像是IP出错？

出错的IP是192.168.1.107

而不是我的IP 192.168.1.111

WebSocketServerConnection@daf86e8{FILLING}{f=Flusher[queueSize=0,aggregateSize=0,failure=org.eclipse.jetty.io.EofException],g=Generator[SERVER,validating],p=Parser@562e4e1c[ExtensionStack,s=START,c=0,len=0,f=null,p=WebSocketPolicy@58fa4b7e[behavior=SERVER,maxTextMessageSize=65536,maxTextMessageBufferSize=32768,maxBinaryMessageSize=65536,maxBinaryMessageBufferSize=32768,asyncWriteTimeout=60000,idleTimeout=3600000,inputBufferSize=4096]]}

IOState@49fab32e[CLOSED,!in,!out,finalClose=CloseInfo[code=1006,reason=WebSocket Read EOF],clean=false,closeSource=ABNORMAL]

CloseInfo code 1006 reason WebSocket Read EOF

用的是Jetty 9的，官方的websocket

servlet 3.1

websocket – finding out the reason for Web Socket disconnect happened – Stack Overflow

getting the reason why websockets closed – Stack Overflow

websocket – Web socket error close codes specific to browser – Stack Overflow

[2.2] WebSocket api uses a forbidden status code 1006 – Google Groups

[2.2.0-scala] WebSocket API uses a wrong status code 1006 · Issue #1948 · playframework/playframework

IOState CLOSED finalClose 1006 reason WebSocket Read EOF clean false closeSource ABNORMAL

WebSockets closing abnormally? · Issue #225 · mozilla-services/FindMyDevice

websocket disconnect by ios

How to check client is connected in web socket? · Issue #353 · websockets/ws

ios – How to prevent Web Socket from disconnecting while iPhone/iPad goes in lock state? – Stack Overflow

websocket – How to reconnect socket.io iOS client when wifi is switched off then enabled again? – Stack Overflow

Unable to keep Websocket alive in background iOS | Apple Support Communities

Unable close/disconnect WebSocket in pause event on iOS

ios websocket connected but not receive

ios websocket can not receive

ios websocket disconnected

iphone – iOS Websocket Library(SocketRocket) gets disconnected at every few seconds – Stack Overflow

acmacalister/jetfire: WebSocket (RFC 6455) client library for iOS & OS X

websocket – SRWebsocket connection is closing automatically after keeping app idle for sometime in iOS – Stack Overflow

抽空去试试：

application.idleTimerDisabled

和websocket有没有sendPing

websocket sendping

ios websocket sendping

ios – SocketRocket connection pausing while in background – Stack Overflow

－》在app进入后台，假装借用CLLocationManager去保持位置更新

从而使app的websocket仍然连接

从而保证收发消息正常。。。

－》虽然不好，貌似可以工作？

daltoniam/Starscream: Websockets in swift for iOS and OSX

里面自带：

socket.writePing(NSData()) //example on how to write a ping control frame over the socket!

那就去试试：每隔2分钟，发送一个ping到服务器，看看最后效果

代码加了：

webSocket.writePing(NSData())

变成：

    func websocketKeepConnect(){

        gLog.debug("gCurUserItem.hasLogined=\(gCurUserItem.hasLogined), gCurUserItem.wsInited=\(gCurUserItem.wsInited)")

        if gCurUserItem.hasLogined && gCurUserItem.wsInited {

            gLog.info("connect \(webSocket)")

            //no matter is connected or not, force connect it to send noop to server to keep websocket alive

            webSocket.connect()

            webSocket.writePing(NSData())

        }

    }

结果就可以了：web socket就不会断了。就可以正常收发消息了。

［整理］websocket的ping和pong以及ping的最佳间隔时间

完整代码：

import UIKit

class MainViewController: UITabBarController, UIGestureRecognizerDelegate, WebSocketDelegate, WebSocketPongDelegate {

    func initWebSocket(){

        dispatchUserInitiated_async({

            gLog.debug("gCurUserItem.wsUrl=\(gCurUserItem.wsUrl)")

            //ws://jiandao.im/message/user-972b6796-cc82-4058-b29f-9007115116b9/9i8fu0uooq18tunpo9h6grp6gk

            self.webSocket = WebSocket(url: NSURL(string: gCurUserItem.wsUrl)!)

            self.webSocket.delegate = self

            self.webSocket.pongDelegate = self

            self.webSocket.connect()

            gCurUserItem.wsInited = true

            MainViewController.wsFirstInit = true

            gLog.debug("websocket \(self.webSocket) has inited and connected")

            self.jpushSetAlias()

        })

    }

    func websocketDidConnect(socket: WebSocket) {

        //<JianDao.WebSocket: 0x7ffe09cbf9f0>

        gLog.debug("\(socket) connected")

        if gCurUserItem.hasLogined {

            if MainViewController.wsFirstInit {

                gLog.debug("is websocket, so not update all conversation")

                MainViewController.wsFirstInit = false

            } else {

                //later sometime, when after disconect then reconnect

                //so need update conversation list

                SingletonConversationTVC().updateAllConversation()

            }

        }

        startWsKeepConnectTimer()

    }

    func startWsKeepConnectTimer() {

        //Note: makesure when call NSTimer.scheduledTimerWithTimeInterval, need in Loop environment

        //so here need in main queue

        dispatchMain_async({

            self.wsKeepConnectTimer = NSTimer.scheduledTimerWithTimeInterval(

                NSTimeInterval(WebsocketKeepConnectIntervalInSec),

                target: self,

                selector:#selector(MainViewController.websocketKeepConnect),

                userInfo: nil,

                repeats: true)

            gLog.info("start websocket keep connect timer: \(self.wsKeepConnectTimer)")

        })

    }

    func StopWsKeepConnectTimer() {

        gLog.info("invalidate websocket keep connect timer \(self.wsKeepConnectTimer)")

        self.wsKeepConnectTimer.invalidate()

    }

    func websocketKeepConnect(){

        gLog.debug("gCurUserItem.hasLogined=\(gCurUserItem.hasLogined), gCurUserItem.wsInited=\(gCurUserItem.wsInited)")

        if gCurUserItem.hasLogined && gCurUserItem.wsInited {

            if webSocket.isConnected {

                gLog.info("write ping for \(webSocket)")

                webSocket.writePing(NSData())

            } else {

                gLog.info("found disconncted websocket \(webSocket), connect it")

                //no matter is connected or not, force connect it to send noop to server to keep websocket alive

                webSocket.connect()

            }

        }

    }

    func websocketDisconnect(){

        if gCurUserItem.wsInited {

            StopWsKeepConnectTimer()

            gCurUserItem.wsInited = false

            gLog.info("disconnect \(webSocket)")

            webSocket.disconnect()

        }

    }

    func websocketDidDisconnect(socket: WebSocket, error: NSError?) {

        gLog.error("socket=\(socket), error=\(error?.localizedDescription)")

        //websocket is disconnected: Optional("Invalid HTTP upgrade")

        if gCurUserItem.wsInited {

            webSocket.connect()

            gLog.debug("try reconnect")

        } else {

            gLog.warning("not reconnect for websocket not inited")

        }

    }

    func websocketDidReceiveMessage(socket: WebSocket, text: String) {

        let messageData:NSData = text.dataUsingEncoding(NSUTF8StringEncoding)!

        let messageDict = JSON(data: messageData)

        SingletonConversationTVC().processSingleMessageDict(messageDict)

    }

    func websocketDidReceiveData(socket: WebSocket, data: NSData) {

        gLog.info("socket=\(socket) , data.length=\(data.length)")

    }

    func websocketDidReceivePong(socket: WebSocket) {

        gLog.info("socket=\(socket)")

    }

然后后来收到了pong的响应：

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