IIS Express is great for web developers. Being able to test things using a “proper” Web Server rather than Cassini with it’s quirks but without needing the hassle of running a full IIS setup is a great timesaver, and plus it means you have the ability to use additional IIS modules locally, such as the IIS Rewrite modules.
Today I accidentally left a production ‘non www to www’ redirection rule enabled locally on a site I was working on, and so of course when I ran it up I was redirected through to www.localhost – I went and disabled the rule, but yet hitting localhost with the site’s port kept attempting to apply the redirection to www.localhost.
I had the rule disabled already, so I deleted it. I restarted IIS Express and restarted Visual Studio – but the redirect was still happening.
After hunting through IIS Express’s configuration files I realised that the culprit was actually the browser I use for testing, IE9. It seems that when IE9 is told that a redirection is permanent, it REALLY believes that, and it’s not until I cleared the browsing history that I could get back to the site without the redirection being applied. It’s interesting that it seems to treat site/port as a unique combo here, so http://localhost:54271/ was exhibiting this issue where as http://localhost:3271/ wasn’t.
Anyway it’s kind of obvious when you think about it, but it had me scratching my head for a few minutes.
Tags: IIS, Web Development
About me
My name is Ross Hawkins and I'm a developer, consultant, business owner and writer based in Auckland,
New Zealand (pictured below!). My current work revolves around ASP.NET, C#, jQuery, Ajax,
SQL Server, and a mix of other Microsoft development technologies.
I also have about 15 years of experience with IBM Lotus Notes/Domino and associated technologies. While Notes/Domino
is no longer my primary focus I still like to dabble and keep my skills up to date.
I own and run 2 businesses - Hawkins Consulting Services,
and Ignition Development.
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