CODEWITHSUNDEEP
java
JavaBeigner
JavaBeigner

Reputation: 607

Java how to check if website block from Network Adminstrator

Is it possible with Java code to check if any URL or website is blocked by Network Admin ? Suppose I am logging in by my Gmail credentials to my website. Now if I open the website in a network where Gmail is blocked, how would I tell the user that this website is blocked in your network and so you cannot login from Gmail.

Upvotes: 3

Views: 868

Answers (2)

Sanjeev
Sanjeev

Reputation: 9946

In order to find out if a site is blocked by your network administrator, you need to check the content received :

    URL url = new URL("http://www.gmail.com");
    URLConnection connection = url.openConnection();

    connection.connect();

    InputStream is = connection.getInputStream();

    byte[] b = new byte[1024];
    while(is.available()>0) {
        is.read(b);
        System.out.println(new String(b));
    }

You should analyze the content from input stream and based on that you can decide. I tried it and it gave me the HTML page set by network admin.

If your company using any proxy than you need to set following as well:

    System.setProperty("http.proxyHost", "<proxy address>");
    System.setProperty("http.proxyPort", "<proxy port>");

Hope this helps

Upvotes: 2

Kenneth Clark
Kenneth Clark

Reputation: 1765

The following piece of code will do what you want , but its a BEST Guess 

try {
    URL myURL = new URL("http://example.com/");
    URLConnection myURLConnection = myURL.openConnection();
    myURLConnection.connect();
} 
catch (MalformedURLException e) { 
    // new URL() failed
    // ...
} 
catch (IOException e) {   
    // openConnection() failed
    // ...
}

Upvotes: 2

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