Thursday, July 24, 2014

Javascript: trim function support in all browsers



In Javascript, when we want to remove spaces in a string, we would be using trim function which is supported in all major browsers. See below code to use trim function in Javascript.

var str = "     message to trim    ";
document.write(str.trim());  // this code will prints as message to trim in the body.

But the above trim() function doesnot support in IE. To support the same functionality in IE too, add the below code to work as expected.

if (typeof String.prototype.trim !== "function") {
    String.prototype.trim = function () {
        return this.replace(/^\s+|\s+$/g, "")
    }
}


Saturday, May 17, 2014

Restrict image access from browser using HTACCESS



 When we want to restrict the image access from the browser other than the page, add the below code in htaccess file to apply.


RewriteEngine on 
RewriteCond %{HTTP_REFERER} !^http://(www\.)?localhost [NC] 
RewriteCond %{HTTP_REFERER} !^http://(www\.)?localhost.*$ [NC] 
RewriteRule \.(gif|jpg|png)$ - [F]

localhost need to be replaced by the domain name where the application is hosted. 

NOTE: Above code works in Apache (LINUX) not in windows

Monday, April 28, 2014

Redirect to maintenance page using HTACCESS



 Redirecting the whole site to maintenance page using HTACCESS

RewriteEngine On
RewriteBase /
RewriteCond %{REMOTE_ADDR} !^111\.11\.1\.11
RewriteCond %{REQUEST_URI} !^/maintenance\.html$
RewriteRule ^(.*)$ http://www.domainname.com/maintenance.html [R=307,L]


Rewrite condition mentioned is to stop the redirection for that particular domain.

RewriteCond %{REMOTE_ADDR} !^111\.11\.1\.11

"maintenance.html" is the page where you want to redirect the website.