What is content?

1026

What javascript libraries and frameworks are available for ajax support?

934

How many types of java are there?

980

Do you know what is priority inheritance?

894

How would you implement two stacks using a single array?

989

4 down vote favorite share [g+] share [fb] share [tw] I am developing my site using server side sessions using redis as backend for saving the session. Now the issue which is bothering me is of user leaving the website without logging out. I mean user simply closes the browser which causes the cookie to be deleted. Now session of that user still exists on the server and will not be used again as new login requires creating a new session due to security reasons. To avoid the case where hacker steals the old cookie and use it after user login again with same old session id. In essence user leaves the website without explicitly logging out and his session will be deleted after certain time limit of inaccessibility. I am thinking time limit of 30-60 minutes. Also with every new request from user his cookie will also be updated to keep track of when the user last time accessed the site. But nowadays, people let site remain open for long time without accessing it. For example users open facebook and gmail in new tabs and forget about them for 2-3 hours and still they are not asked to login again. Is letting a 2-3 hours old cooke access the session secure? My concern is someone steals user cookie and use it 2-3 hours later. Thinking on this topic has also forced me to question how facebook manages security if user can use a session where they are not accessing it for long periods of time and still they remain logged in. Or is it not secure for me to keep logged in when am not accessing the site session for longer period of time? It can be the case also there is some pinging mechanism using which sites keep track of user having their site open in a browser and when browser closes they are notified and can work accordingly. My website is a social network and needs all those security and usage features which a social network may need. I am new to web security and web development in general and may be the case where my above questions may seem a little basic. If you feel that is the case kindly point to some good reference where I can read and find answers to my question.

2140

What is python easy?

811

How will you append a file to a previous archive take by tar?

3

Explain about abstract classes in java?

1034

Do you know what is linen fiber?

1

Who calls the main function of app during the app launch cycle in ios?

849

What distinguishes php from something like client side java script?

1035

Which constant is used for print and display functions and works as same as pressing enter key?

1008

What is the use of persistent store in weblogic?

955

What is defined as false sharing in the context of multithreading?

1045