java - How do I implement online/offline feature with REST based application? -

-

i building chat feature(web application) in user has list of friends can chat with. friends can online or offline, in facebook. since, application built on rest apis, don't save session , of authentication stateless.

so question is, how know online or offline among list? best way implement this?

usually chat applications send message client server after set time period, if message not received, user offline.

i not java developer, suggest websockets chat. hope helps.


Comments

Post a Comment

Popular posts from this blog

symfony - InvalidConfigurationException in SecurityExtension.php line 429: No authentication listener registered for firewall "secured_area" -

-
i'm new symfony user , follow tutorial . current task add logout script unfortunately gives me error: invalidconfigurationexception in securityextension.php line 429: no authentication listener registered firewall "secured_area". my security.yml file looks this: security: # http://symfony.com/doc/current/book/security.html#where-do-users-come-from-user-providers providers: in_memory: memory: users: ryan: password: $2a$12$lcy0mefviec3typhv9snnuzofyr2p/axigoqjeds4am4jwhnz/jli roles: 'role_user' admin: password: $2a$12$cytwee9kpq1pjqkfiwuzfucrpwvyazwm4xzmz1qpufl7/flcm3v0g roles: 'role_admin' firewalls: secured_area: # ... logout: path: /logout target: / # disables authentication assets , prof...
Read more

angular ui router - 10 digest iterations reached in angularjs when using $state.go -

-
i using angular ionic. i not want user have login again in case logged in , did not logout last time used application. reason, using local storage check if user logged in. tried putting code in run block. $rootscope.$on('$statechangestart', function (event, tostate, toparams, fromstate, fromparams) { if($localstorage.userinfo){ $state.go('deployment'); //this line 270 of app.js event.preventdefault(); return; } }) but gives error says: rangeerror: maximum call stack size exceeded @ scope.$broadcast (ionic.bundle.js:23414) @ object.transitionto (ionic.bundle.js:40804) @ object.go (ionic.bundle.js:40671) @ app.js:270 @ scope.$broadcast (ionic.bundle.js:23412) @ object.transitionto (ionic.bundle.js:40804) @ object.go (ionic.bundle.js:40671) @ app.js:270 @ scope.$broadcast (ionic.bundle.js:23412) @ object.transitionto (ionic.bundle.js:40804) also, error: [$rootscope...
Read more

javascript - Handling constructor related functions while testing with mocha and sinon -

-
i testing application in declare specific variable within constructor , assign return of function imported class. how code looks like: var someclass; function constructor() { this.someclasshandler = null; } constructor.prototype.newsomeclass = function() { someclass = require('./someclass.js'); return new someclass(); } constructor.prototype.getfunction = function() { this.someclasshandler = this.newsomeclass(); } constructor.prototype.callsomefunction = function() { this.someclasshandler.somefunction(); } when try test code whether function 'somefunction' imported class 'someclass' called within method'callsomefunction' receive failed test responses variable 'someclasshandler' still equals null (which makes sense not call method 'getfunction' assigns class variable). i use mocha , sinon tests, bit helpless whether mock or stub class in order assign variable 'this.someclasshandler' correctly. the m...
Read more