20 Lines or Less
There are 58 entries for the tag 20 Lines or Less
What could you do with your code in 20 Lines or Less? That's the question I ask (sometimes?) 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. This week the forums provide us with more examples of iRules wizardry (or at least apprentice awesomeness) in a scant 20 lines or less each. The credit goes to the awesome community for providing such frequent and awesome examples. This week's installation of iRules...
What could you do with your code in 20 Lines or Less? That's the question I ask (sometimes?) 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. This week we've got three awesome examples of iRules that are designed to increase your application's security in less than 21 lines of code. Dealing with header size, cache control, and a Microsoft advisory, we get to see a couple of different ways in which iRules...
What could you do with your code in 20 Lines or Less? That's the question I ask (sometimes?) 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. This week nitass and hoolio deliver the 1-2-3 punch with 3 cool iRules to perform various tasks that I deem useful, or interesting, or...both. We get a look at dealing with destination servers with a dynamic IP, handling SSL and non SSL connections on the same...
What could you do with your code in 20 Lines or Less? That's the question I ask (sometimes?) 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. This week I'm digging through my list of cool threads from the past month or so and picking out a few that I think are interesting. More to follow, but we're starting with a cool little geolocation redirection rule that will allow you to direct people from different...
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. By a show of hands, who else here is surprised and/or excited that we finally made it to the 50th 20 Lines or Less? I'm a little of both, though more excited than anything. Years ago when I started the series I wasn't sure if anyone would...
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.
This week I do the unthinkable ... I write my own code! Well, some of it, anyway. While I've been happily using the community's examples for this series this week I ended up writing a couple of neat 20LoL worthy entries as responses to forum posts, so I figured I'd...
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. This week we take a look at a couple of simple commands that can make your life a lot easier. iRules don't have to be complex to be useful, as such it's a good notion to make yourself familiar with some of the basic commands and the many...
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. Digging through the forums this week has been rewarding. There are a ton of people out there writing cool iRules, some big, some small, but all cool and good to see. The few chosen for the 20lol this week are all interesting takes on problems we’ve seen before....
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. Continuing the long standing tradition, this week’s 20LoL brings to you DNS lookups with variable resolvers, avoiding RPC issues with ASM, and some advanced pool selection logic by way of class searching. Thanks go out to user Kent Perrier, mbamusa and ichalis for the examples or inspiration. Now...
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. I’m back again this week with examples #135, 136 and 137 in the 20 Lines or Less series. Chiming in this week are Chris Miller, Hoolio and Bhattman himself. Three of our power users bringing you three cool chunks of iRule that get the job done. This week...
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.
This week I’ve got some cool forum examples including Chris Miller’s awesome example of doing a redirect, but in an interesting way that includes an iRule generated HTML page with an in-line meta refresh, some cool SSL re-encryption logic, and a look at how you can use TCP and node...
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.
In the first 20LoL of the new year I bring to you a diverse offering of iRule goodness ranging from HTTP Authentication via iRule, to nesting switch inside if and why it’s important not to use elseif when doing so, as well as re-writing partial URL strings for redirection.
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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. This week I bring to you two cool iRules from the forums and one from a secret squirrel internal mailing list OF DOOM!!!. Okay, maybe not of doom, but it’s a list with some wicked smart people on it and I’m lucky to get to harvest good stuff...
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.
This week I’m happy to bring you some very cool iRules dealing with client access to admin sections of an application, strict RR Load Balancing, and client connection limiting. Moreover, I’m even more pleased that two of the examples in this episode are from spark himself, one of the core...
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. This week we dive into parsing SSL encrypted payloads until a given string is found, logging user login info as it comes across the wire, and enforcing a subsite ACL. http://devcentral.f5.com/Community/GroupDetails/tabid/1082223/asg/50/afv/topic/aft/1172756/aff/5/showtab/groupforums/Default.aspx#1175124 In this first, rather cool, example from user mattrm we get a peek at...
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...
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.
This week we’ve got a couple awesome new examples from two of the community all-stars, and one dusty old example from my archives. They’re all cool and useful, so take a peek and see what you think. If you want a problem solved or to submit an example, feel free,...
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.
I bring to you your weekly dose of short yet cool iRule goodness. Check out what these iRule fu masters have crammed into less than 21 lines of code. This week we’ve got hex translation of HTTP payloads, intelligent redirection including port handling, and some snat intelligence in just a...
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 announcement of the BIG-IP LTM VE this week, the iRules world just got a little more interesting. Between the new commands and features that have come out in the past several months, and now the ability to build and test iRules from your laptop, without having...
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. It’s been hectic here in DCland and finding time to write has been more difficult than normal, though that shouldn’t be a problem much longer. Fortunately for all of us this awesome community keeps kicking out the jams so I can rely on their hawesome knowledge to provide...
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. So here we are in the future. Surely by 2010 we should have jetpacks and hover cars and personal teleporters, right? Well, technological advancements may have fallen short on some of those things promised to us time and time again by the world of sci-fi, but advancements there...
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. This week the answer to that question is a good one – Win the iRule do You? contest! Rather than trolling the forums, CodeShare and my personal archives, this week I bring to you a special 20LoL edition. This week’s entries are pulled from the winners and honorable...
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. SIP topology hiding forward proxy http://devcentral.f5.com/wiki/default.aspx/iRules/SIP_topology_hiding_and_forward_proxy.html If you’re passing SIP traffic and want a way to mask the via & or from headers when passing traffic to the outside world, this might be just the rule you’ve been waiting for. It’s a cool look...
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. This week not only are the examples cool and interesting, but one of them at least is extremely timely. You’ve no doubt heard about the client-initiated MITM attack for TLS that was recently disclosed. It’s front-page news around the web and for good reason. While research needs to...
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...
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. 29 editions later and still going strong. The 20LoL is a testament to just how many different things can be done with iRules in just a few lines of code. Just imagine the possibilities if this were the 30LoL. This week I’ve got three more examples,...
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. Nearing the thirty mark with the 20LoL it occurs to me that I’m having a harder and harder time with something. No, it’s not finding interesting ideas to feature. The community has been absolutely stellar with that part. There are always plenty of iRules for me to grab...
As the extended DevCentral crew continues to crank through the summer months, churning out more and more awesome content, there is lots to see. Whether you're looking for short, easily consumable pieces of media to get you pointed in the right direction or longer posts about the practicality of running your crew or your servers close to the ragged edge, I've got both for you this week. Check out this week's Top5: pyControl Apps #2 - Deleting BIG-IP Routes http://devcentral.f5.com/Default.aspx?tabid=63&articleType=ArticleView&articleId=2318 In Jason's continuation of the pyControl Apps series he continues to walk you through how...
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”...
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.
This week we’ve got more cool iRules toys to show off. That’s not the impressive part, the impressive part is that only two of the three examples are from hoolio. I know, right? Joking aside, a huge thank you to hoolio for his astounding contributions to the community, and to...
What could you do with your code in 20 Lines or Less? That's the question I ask (almost) every week, 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. Digging through the forums this week turned up a couple more great examples of iRules that can fit in the palm of your hand. They’re so cute and cuddly at under 21 lines, but they pack a punch. It seems there’s more and more to keep up with in the forums these...
It's been busy! The DevCentral team and all of the awesome people in our extended family have been working away, putting out all kinds of great content for your perusal. Now that we're out of the hardcore v10 push and back into a more "normal" flow of content there has been a myriad of tasty morsels flowing through the DC channels. From a posh search experience to security secrets and new wrappers, we've had plenty to talk about. Let's get to this week's Top5: The Secret of the Security Safety Dance http://devcentral.f5.com/weblogs/macvittie/archive/2009/06/03/the-secret-of-the-security-safety-dance.aspx This week Lori...
What could you do with your code in 20 Lines or Less? That's the question I ask (almost) every week, 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. This week is apparently the week of encryption! I bring to you from my fellow DevCentralites a trio of encryption/hashing goodness via iRules. Two of today’s iRules were pulled from the samples page, one was recommended to me by Jason. All are very cool examples of iRules geekery and creativity, and they...
What could you do with your code in 20 Lines or Less? That's the question I ask (almost) every week, 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. Catching up with a couple weeks of iRules goodness, I've got some cool ones for you again this week. I'm happy to see people are adding plenty of handy iRules in the CodeShare. It doesn't just make my job of finding cool, succinct iRules easy, it makes your lives as iRulers easier,...
Taking the rush of content on DevCentral in stride, I'm back again with 5 more items of interest for you that you really shouldn't miss. Hopefully the week's been good for you, whether that means bug-free code, trouble free system patching or happy clients. Things haven't really slowed down here since being turned "up to 11", so there's plenty to do and digest for everyone. Amidst the always churning stream of geeky goodness that DevCentral has to offer, there are rumblings lately of very cool things to come, so keep your eyes peeled. For now I offer you my picks...
What could you do with your code in 20 Lines or Less? That's the question I ask (almost) every week, 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. Wow! It's been a while since I was able to pull the cycles away from other things to get to the 20LoL. Many apologies to any of you out there that have missed it. Things here have been amazingly busy (in a good way) and I just haven't made the time. There...
What could you do with your code in 20 Lines or Less? That's the question I ask (almost) every week, 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. For this week's 20 Lines or Less I thought I might bring you some iRules that are fresh off the presses. I've been digging through the iRules forums today, trying to keep up with this outstanding community and their many innovations, concepts and questions. In doing so I got to answer some...
It's the 20th edition of 20 Lines or Less! Wait...is that a recursion loop or something? To celebrate this momentous occasion I'll still be asking What could you do with your code in 20 Lines or Less? But I'll be recalling my three favorite examples from the past editions of the 20LoL. These are things that not only made the list but were interesting enough that as I was going over them again they stood out to me as cool or compelling examples that were worth noting again, in case...
Welcome to the first DCTop5 of 2009! It's a new year and that means you survived the holidays, the in-laws, the traffic jams, the elections, and if you live in Seattle, record breaking snow-storms. Congratulations, it's time to do it all over. There's been so much great stuff going on in DevCentral Land in the past 12 months that it's been hard for even me to keep up at times. So when I tell you that there's even more to come, and that we're turning up the dial further still this year, believe me when I say that it's going...
What could you do with your code in 20 Lines or Less? That's the question I ask (almost) every week, 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. This week has been fantastic here in DCLand. I've been sequestered in a room with the awesome minds of the DevCentral team for most of the week brainstorming, collaborating, sharing, and thinking up generally cool new stuff! It's always a good time when the team gets together and there are almost always...
What could you do with your code in 20 Lines or Less? That's the question I ask (almost) every week, 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. Back with more cool examples of what iRules can do in a scant 20 lines of code, this week's 20LoL brings you three different HTTP goodies. Fully Decode URIhttp://devcentral.f5.com/Wiki/default.aspx/iRules/FullyDecodeURI.html
This cool example from the wiki shows how you can ensure that your URI is not just decoded once, which can leave stray encoded...
Wow it's been a busy month! Travel, holidays, and so much great content coursing through DevCentral it could make your head spin. I'll do my best, as always, to guide you through the massive amounts of cool stuff and pick out a few of the gems for you to dig into. This week's Top5 is action-packed, with F5/Geeky goodness bursting from every seam, so make sure you check out each of the items below. That said, here's this week's Top5:
F5 ARX and Data Domain - Reduced Expense, Streamlined Storage
http://devcentral.f5.com/weblogs/dmacvittie/archive/2008/12/11/f5-arx-and-data-domain---reduced-expense-streamlined-storage.aspx
Don recently got a chance to chat with some of the folks...
What could you do with your code in 20 Lines or Less? That's the question I ask (almost) every week, 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.
This week's examples are all brought to you by the very awesome and yet to be published Top50 iRules examples. This collection of cool iRules (many directly from your killer DC contributions) is something that was put together as an easy to use, portable reference to some very cool iRule examples. I'll work...
What could you do with your code in 20 Lines or Less? That's the question (almost) I ask every week, 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. This week I bring you some more groovy examples of the power that iRule can bring to the table in just a few short lines of code. We'll touch on Protocol specific header insertion, port re-writing, and configuring partial gets properly for PDF reading. Many thanks to the awesome forum and CodeShare...
What could you do with your code in 20 Lines or Less? That's the question I ask every week, 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. Finally back into the swing of the 20LoL, I'm happy to give you the 15th edition of this blog series. Today's offering is brought to you by me, F5, and the power of iRules (tm). Okay, not really (tm), but it sounded cool. I still find myself on a journey to seek out...
What could you do with your code in 20 Lines or Less? That's the question I ask every week, 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. This week we've got three more fun examples of iRules goodness for you, thanks to the awesome community driving the forums and the CodeShare. As always the goal is to show off some of the things that you can do with iRules in less than 21 lines of code. Let's dig in: ...
What could you do with your code in 20 Lines or Less? That's the question I ask every week, 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.
After a couple of weeks out of the office, I'm back at it with your weekly dose of iRules goodness in under 20 lines. This week's 20LoL comes from the forums as well as the codeshare. We've got some great examples here, including one iRule that can be used to help augment an already existing...
What could you do with your code in 20 Lines or Less? That's the question I ask every week, 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 we go again, three more examples of the powerful and interesting things you can do with iRules in less than 21 lines. Dipping again into the forums, with a few tweaks here and there (don't worry, I stayed honest to the rule, just took out comments and extra case comparisons, that kind...
What could you do with your code in 20 Lines or Less? That's the question I ask every week, 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.
This week's 20LoL comes care of both the codeshare and the forums alike. I got to deal with a couple of particularly cool forum posts this week, one of which made the list, as did an iRule from the infamous hoolio himself. Dealing with HTTP and ranging from spiders to working around a work-week, these...
What could you do with your code in 20 Lines or Less? That's the question I ask every week, 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 another three examples of cool iRules, this week's 20 Lines or Less shows even more things you can do in less than 21 lines of code. I still haven't heard much from you guys as to the kinds of things you want to see, so make sure to get those requests in. I can...
What could you do with your code in 20 Lines or Less? That's the question I ask every week, 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.
This week I've got a combination of entries from our awesome forum users, and a rule I wrote a while back to meet a certain need at the time. We're almost at 10 editions of the 20LoL, and I'm looking forward to many more. Hopefully you're still finding it interesting and useful. Shoot me a...
What could you do with your code in 20 Lines or Less? That's the question I ask every week, 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. For this week's 20LoL sampling I've dipped into my own private stash of iRule goodness. Some of these are oldies but goodies, one of them I actually just wrote yesterday as an example for Lori's Blog. As such the newly written example is the only one with a URI. The others will just...
What could you do with your code in 20 Lines or Less? That's the question I ask every week, 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. This week we've got some more great examples from the community. I've had the chance to sit in with some fellow F5 iRulers the past couple of days and wow, is it ever inspiring to hear all the things they're doing/seeing with iRules, and the kind of stuff heading our way...
What could you do with your code in 20 Lines or Less? That's the question I ask every week, 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. Continuing to draw from the forums, this week's 20LoL is packed with user-contributed goodness. From massaging packets to avoid app-server maintenance, to setting up a customer persistence/re-selection mechanism, we've got it all. This week the iRules range from exactly 20 lines, down to a scant 7 lines of code. Don't be fooled though,...
What could you do with your code in 20 Lines or Less? That's the question I ask every week, and every week I go looking to find cool new examples that show just how flexible and powerful iRules can be without getting complicated.
For the real 20LoL this week, we go back to pilfer the wonderful collection of raw brainpower that is the DevCentral forums. Digging through just a few forum posts gave me a couple of tasty little iRules to share with the class for this week. Not only is this stuff cool, easy to implement, and done in less...
What could you do with your code in 20 Lines or Less? That's the question I ask every week, and every week I go looking to find cool new examples that show just how flexible and powerful iRules can be without getting complicated. Last week I was out on vacation, serenading the good people of Shelton, WA with some thick, groovy funk. As such, the 20LoL had to be put on hold You can consider this your special, super-elite, bonus edition of 20 Lines or Less though, since that sounds cooler. This edition is all about the forums....
What could you do with your code in 20 Lines or Less? That's the question I ask every week, and every week I go looking to find cool new examples that show just how flexible and powerful iRules can be without getting complicated. We've got a couple of codeshare entries and an entry courtesy of Joe in the forums. I figure with all the ribbing he gives me for the 20LoL series it's only fair he contributes, knowingly or not. Then again it's in the true spirit of a programmer to steal ... err ... borrow code from all...
What could you do with your code in 20 Lines or Less? That's the question I ask every week, and I've got more examples for you that show just how powerful iRules can be in less than 21 lines.
This week I'm still drawing from the CodeShare. My plan was to pull from the CodeShare for the first week or two until I'd depleted it of possible examples and then move on. For those of you that haven't checked how awesome the CodeShare is lately, let's just say it would take a lot more than two editions of 20LoL to burn...
