Welcome!

Wielding the Power of the Network to Better Applications Everywhere

Colin Walker

Subscribe to Colin Walker: eMailAlertsEmail Alerts
Get Colin Walker via: homepageHomepage mobileMobile rssRSS facebookFacebook twitterTwitter linkedinLinkedIn


Top Stories by Colin Walker

What could you do with your code in 20 Lines or Less? That's the question I ask (almost) every week for the devcentral community, and every week I go looking to find cool new examples that show just how flexible and powerful iRules can be without getting in over your head. Well we made it to 30 editions of the 20LoL.  Soon we’ll break 100 iRule examples that are under 21 lines of code each.  Pretty neat stuff, if you ask me.  This week is the hoolio show, it seems.  The guy is just a monster in the forums, what can I say?  I sure am glad he’s on our side.  I’ve got three examples that I randomly pulled from the forums because I thought they were cool.  Only later did I realize that he had penned them all.  So big thanks yet again to Aaron and all his hard work to better the community. Pre-loaded searches based on host name http://devcentral.f5.com/Default.aspx?tabid=... (more)

20 Lines or Less: Selective SSL, Port Stripping and Headers

What could you do with your code in 20 Lines or Less? That's the question I ask (almost) every week for the devcentral community, and every week I go looking to find cool new examples that show just how flexible and powerful iRules can be without getting in over your head. With the onslaught of work required to get DC5 up and running it’s been a while since I’ve offered some cool iRule goodness to the community from the community.  There have been plenty of examples cruising through the forums, that’s for sure, I just haven’t had the time to comb through all of them or write the... (more)

What Could You Do with Your Code in 20 Lines or Less?

What could you do with your code in 20 Lines or Less? That's the question I ask (almost) every week for the devcentral community, and every week I go looking to find cool new examples that show just how flexible and powerful iRules can be without getting in over your head. Here are a few more cool iRules from the forums. This week I’ve included one of the simplest, shortest iRules to ever make the 20LoL. It just struck me as something quite useful that I’m willing to bet several people will look at and say “oh, that’s handy” despite the fact that it’s not complex or long.  Keep... (more)

Friendly URL Redirection Scaling via iRules

The concept of a friendly URL is a pretty simple one. Basically you want to make things in your application, on your website, etc. easier to access. This stems from the fact that most applications these days make use of increasingly complex paths for a multitude of reasons. Whether it’s user specific content, auto generated pages or otherwise, typing in a URL that looks like “http://domain.com/a7391/users/0928179/events/live/release/20110403/regions.php?region=atl” isn’t something that’s easy or frankly even realistic for a user. I’m not going to remember that URL, and if I’m a... (more)

RTT (Round Trip Time): Aka – Why bandwidth doesn’t matter

A great post over on ajaxian got me to thinking today.  Why is it whenever you hear people talking about speed on the internet, they use a single metric?  Whether they’re discussing the connection in the datacenter, their residential DSL, or the wireless connection via their mobile device, everyone references the bandwidth of their connection when talking about speed.  “Oh I just got a 20Mb/s connection at home, it’s blazing fast!".  That’s all well and good, and 20 Mb/s is indeed a lot of throughput for a residential connection. Unfortunately for Joe Average, about 98% of the ... (more)