Block a certain website using Java

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3.00/5 (1 vote)

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Hi team!

I'm working on a small (i hope so) project and I'm in a very begginning. I've googled around and still couldn't get started. Let me explain my idea. First I type a website's address (let say codeproject.com) in a JTextField. Then after hitting on a JButton (let say Block), I can't open that site using internet browser (firefox actually). But after hitting another JButton (let say Unblock), I can normally access the website. I've just known that it's difficult to do this using java. Using C++ is maybe a better choice. My system is windows 7 and my project seems to be a filter. Let say you have a black list and don't want any access to websites from that list.

Any advice would be appreciated!

Thanks in advance!

Posted 6-May-12 20:14pm

svatstika

Updated 7-May-12 2:59am

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Manfred Rudolf Bihy 7-May-12 6:40am

Are you talking about blocking the access only on localhost or is it for a whole network of computers?
What OS are you targeting?

Please add the information to your question by using the Improve question link!

Manfred Rudolf Bihy 7-May-12 6:40am

Reason for my vote of 3
Please add more information to your question!

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Manfred Rudolf Bihy · Answer 1 · 2012-05-07T01:18:00

1. On WindowsXP and upward one very easy way to achieve what you want would be to add entries to your hosts file to point certain domain names to localhost. See here: http://answers.yahoo.com/question/index?qid=20080120053857AAqCQgE[^].
There is no need to reboot since upward from Windows9x the changes are immediate. It might be nescessary to resart IE since I've read somewhere that IE caches name lookups.
Remember though that his will block the whole domain. It is not possible to only block certain applications or websites that live under that domain.

2. Use a proxy on your machine and preferably one written in Java. You can easily make some modifications so it can react to messages sent from your application to block or unblock a certain URL. Here a nice list of Open Source Proxies that are all written in Java: http://proxies.xhaus.com/java/[^]

Regards,

Manfred