Dec 13, 2006
Yesterday, I wrote about the Ping
class for checking network availability on remote machines. Then I started thinking
about checking the availability of web servers. Even if a remote server is available
over the network, the web server instance might not response to requests so we need
another method to check if it’s responding correctly.
What we really want is not a Boolean value telling us if the web server is responding
or not. The best way is to get the HTTP status code so we can act appropriately. The
status code for a properly working web server is 200 and 404 if there is no reply.
There are a lot of other codes that we can act differently upon as we please. Here’s
a list of possible status
This static method returns a System.Net.HttpStatusCode enumeration
value based on the specified URL.
private static HttpStatusCode HttpStatus(string url)
using (HttpWebResponse response
You can use it to write the status code to the response stream like this:
By using this simple method it is very easy to build your own web server checking
tool. If you want to run multiple URL checks from ASP.NET, it would be a good idea
to use ASP.NET 2.0’s possibility for asynchronous
processing for improved performance in situations where you are creating web requests.* $4.95/month ASP.NET Hosting with FREE SQL 2012 DB! – Click Here!