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  • mail server checklist..

    - by Jeff
    currently we ran into some issues with our mail server setup. im preparing a list of actions that we should enforce and use in order to maintain a proper email solution within our company. we have around 80 exchange users, and send mass emails out almost on a monthly bases to 20,000 + customers each time.. the checklist i currently have: 1) mcafee mxlogic 'cloud' anti-spam functionality for incoming message. 2) antivirus on each computer in company 3) antivirus on exchange and DNS servers 4) setup SPF record 5) setup DKIM 6) setup domainkey 7) setup senderID 8) submit spf to microsoft, yahoo, etc. for 'whitelist' purposes. 9) configure size limits for messages in exchange to safe numbers 10) i have 2 outside IPs for my email server, incase one gets blacklisted, switch to the backup. 11) my internet site rests on a different ip than the mail server 12) all mass emails for company sent through 3rd party company (listtrak.com) 13) setup domain alias, media, enews, and bounce for the 3rd party mass mail software. 14) verify the setup using [email protected] 15) configure group policy and our opendns.org account to prevent unwanted actions and website viewing mass emails: 1) schedule them to send different amounts at different times (1,000 at 10am, 1,000 at 4pm, 1,000 10am next day).. 2) setup user prefences, decide what they want to receive ect. ( there interests) 3) send a more steady flow of email, maybe 100 a week with top new products instead of 20,000k every other month.. if anyone has suggestions or additions/subtractions to this checklist they are greatly appreciated. thank you

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  • How do I know if I managed to completely remove an undetected trojan?

    - by ubuntuisbetter
    I catched a trojan that uses explorer.exe to reproduce itself in case of deletion of its autostart entry or main exe file in Programs/x. It had already tried to contact a suspicious server over explorer.exe, blocked that via my firewall. I: Removed the autostart entries from the registry Looked through my services if there was anything suspicious Deleted the trojan from Programs/ Went through System Volume Information to find a 2 month old explorer.exe and replaced the possibly infected one. There are no suspicious processes running now anymore (no duplicate explorer.exe) and nothing wants to connect this trojan owners sever either. I checked my system with several anti-malware programs too. What the trojan did: Started a second explorer.exe Always when I deleted the main trojan exe file it was reproduced (by the second explorer.exe) Always when I deleted the autostart entry it was reproduced by the explorer.exe too. When I terminated the suspicious explorer.exe, which used only half as much memory as the less suspicious one from Windows, a strange thing that I know from the computers in my Informatics class happened: A window popped up in the top left of my explorer-less desktop, titled "Personal settings for ... are ..." that obviously copied some files. Then both explorer.exes started again and the trojan was everywhere again. What did the trojan actually do to get explorer to rescue it? Is my PC clean of this newish trojan now? What are the other locations I should check for the trojan? The trjoan doesn't seem very high-level, could it have changed other system files or is the autostart entry vital for it? Thanks in advance, Your trojan paranoid friend (Getting linux in a week)

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  • Applications are being opened by IE instead of running normally

    - by Star
    I rewrote the Question to add everything that i tried so far. Many of my applications are being opened by Internet Explorer. (not all) For example when I run Firefox.exe (from shortcut) I get IE run instead, with the following URL http: // %22d/ Browser/firefox.exe%22 (I added spaces to prevent link creation) the shortcut target is: "D:\Browser\firefox.exe" when I attempted to open firefox.exe from it's folder the results were the same as the previous one I attempted to open it by cmd, so i navigated with cmd to the FF path then wrote: firefox.exe the was the same except that the URL was: http: // Firefox.exe/ when i jsut write firefox the result URL was: http: // Firefox/ (is it some kind of parameter or something??) trying the same with chrome resulted the same results as the previous tests. I tried creating a new user (adminstartor) but the problem still there. I tried every registry key with exe on it (not sure if i tried them all) no change I tried removing IE but came back by itself somehow, meanwhile IE is removed, FF and its fellow apps gave me open with window I tried reinstalling the applications but it just no use. Time Line: (as requested from @Daredev) I don't know when it happened because the computer is for the company i work for and it was like that since i got it. (The IT there gave up on the problem lon time ago!). applications were installed already are "firefox" and "XPS viewer" . applications were working after the problem everything except what uses browsing (MS help viewer, XPS viewer, firefox-even I've re installed it-, opera, chrome) that what I thought but after installing Maxthon , comodoDragon this theory was blown away. system info: 1- windows xp professional service pack 3 2- system fully patched: Yes 3- anti-virus up to date: Yes 4- same behavior when booting into safe mode: Yes

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  • Win7 taskbar freezes on startup for about 1-2 mins

    - by Mike
    Running Win7 64-bit for about 4 months now. Never had this problem, didn't install anything new recently. When I boot up I can't do anything in the taskbar, it's frozen for about 1-2 minutes then everything is normal. I can right click on my desktop and move my mouse around. This randomly just started happening a couple days ago after a reboot. I have a 3.2ghz quad, SSD, 4 gig ram, etc. and it usually starts up quickly. After some troubleshooting (including running antivirus and Anti-Malware), it doesn't appear to be software related, but appears to be services related. I can boot up in safe mode and safe mode with networking just fine. I can also boot up normally with all my regular software loading at startup, BUT with all my services turned off. Now the odd part. When I run msconfig to disable all the services at startup and go through ticking them on 5-10 at a time or so and booting up it seems to be somewhat random. Ticking everything on from "Application Experience" halfway down to about "Quality Windows Audio Video Experience" and I can boot without the 1-2 min. freeze. Then I start ticking the stuff below that from a couple of Remote Accesses to Smart Card and Task Scheduler, etc. But the weird part is sometimes it will freeze sometimes it won't. I can't narrow it down. Then if it freezes, I'll boot up in safe mode and turn the ones I just turned on back off and I'll reboot normally but it will freeze again. Which makes no sense because that configuration just worked without freezing just before. I got frustrated enough that I backed up and wiped my hard drive (formatted and everything) and reinstalled Win7 but when I booted up, the freeze happened again. Any ideas? Thanks in advance.

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  • Protecting Apache with Fail2Ban

    - by NetStudent
    Having checked my Apache logs for the last two days I have noticed several attempts to access URLs such as /phpmyadmin, /phpldapadmin: 121.14.241.135 - - [09/Jun/2012:04:37:35 +0100] "GET /w00tw00t.at.blackhats.romanian.anti-sec:) HTTP/1.1" 404 415 "-" "ZmEu" 121.14.241.135 - - [09/Jun/2012:04:37:35 +0100] "GET /phpMyAdmin/scripts/setup.php HTTP/1.1" 404 405 "-" "ZmEu" 121.14.241.135 - - [09/Jun/2012:04:37:35 +0100] "GET /phpmyadmin/scripts/setup.php HTTP/1.1" 404 404 "-" "ZmEu" 121.14.241.135 - - [09/Jun/2012:04:37:36 +0100] "GET /pma/scripts/setup.php HTTP/1.1" 404 399 "-" "ZmEu" 121.14.241.135 - - [09/Jun/2012:04:37:36 +0100] "GET /myadmin/scripts/setup.php HTTP/1.1" 404 403 "-" "ZmEu" 121.14.241.135 - - [09/Jun/2012:04:37:37 +0100] "GET /MyAdmin/scripts/setup.php HTTP/1.1" 404 403 "-" "ZmEu" 66.249.72.235 - - [09/Jun/2012:07:11:06 +0100] "GET /robots.txt HTTP/1.1" 404 430 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" 66.249.72.235 - - [09/Jun/2012:07:11:06 +0100] "GET / HTTP/1.1" 200 424 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" 188.132.178.34 - - [09/Jun/2012:08:39:05 +0100] "HEAD /manager/html HTTP/1.0" 404 166 "-" "-" 95.108.150.235 - - [09/Jun/2012:09:42:09 +0100] "GET /robots.txt HTTP/1.1" 404 432 "-" "Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)" 95.108.150.235 - - [09/Jun/2012:09:42:09 +0100] "GET /robots.txt HTTP/1.1" 404 432 "-" "Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)" 95.108.150.235 - - [09/Jun/2012:09:42:10 +0100] "GET / HTTP/1.1" 200 424 "-" "Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)" 95.108.150.235 - - [09/Jun/2012:09:42:10 +0100] "GET / HTTP/1.1" 200 424 "-" "Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)" 95.108.150.235 - - [09/Jun/2012:09:42:11 +0100] "GET / HTTP/1.1" 200 424 "-" "Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)" 95.108.150.235 - - [09/Jun/2012:09:42:11 +0100] "GET / HTTP/1.1" 200 424 "-" "Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)" 194.128.132.2 - - [09/Jun/2012:16:04:41 +0100] "HEAD / HTTP/1.0" 200 260 "-" "-" 66.249.68.176 - - [09/Jun/2012:18:08:12 +0100] "GET /robots.txt HTTP/1.1" 404 430 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" 66.249.68.176 - - [09/Jun/2012:18:08:13 +0100] "GET / HTTP/1.1" 200 424 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" 212.3.106.249 - - [09/Jun/2012:18:12:33 +0100] "GET / HTTP/1.1" 200 388 "-" "-" 212.3.106.249 - - [09/Jun/2012:18:12:34 +0100] "GET /phpldapadmin/ HTTP/1.1" 404 379 "-" "-" 212.3.106.249 - - [09/Jun/2012:18:12:34 +0100] "GET /phpldapadmin/htdocs/ HTTP/1.1" 404 386 "-" "-" 212.3.106.249 - - [09/Jun/2012:18:12:35 +0100] "GET /phpldap/ HTTP/1.1" 404 374 "-" "-" 212.3.106.249 - - [09/Jun/2012:18:12:36 +0100] "GET /phpldap/htdocs/ HTTP/1.1" 404 381 "-" "-" 212.3.106.249 - - [09/Jun/2012:18:12:36 +0100] "GET /admin/ HTTP/1.1" 404 372 "-" "-" 212.3.106.249 - - [09/Jun/2012:18:12:38 +0100] "GET /admin/ldap/ HTTP/1.1" 404 377 "-" "-" 212.3.106.249 - - [09/Jun/2012:18:12:38 +0100] "GET /admin/ldap/htdocs/ HTTP/1.1" 404 384 "-" "-" 212.3.106.249 - - [09/Jun/2012:18:12:38 +0100] "GET /admin/phpldap/ HTTP/1.1" 404 380 "-" "-" 212.3.106.249 - - [09/Jun/2012:18:12:39 +0100] "GET /admin/phpldap/htdocs/ HTTP/1.1" 404 387 "-" "-" 212.3.106.249 - - [09/Jun/2012:18:12:39 +0100] "GET /admin/phpldapadmin/htdocs/ HTTP/1.1" 404 392 "-" "-" 212.3.106.249 - - [09/Jun/2012:18:12:40 +0100] "GET /admin/phpldapadmin/ HTTP/1.1" 404 385 "-" "-" 212.3.106.249 - - [09/Jun/2012:18:12:40 +0100] "GET /openldap HTTP/1.1" 404 374 "-" "-" 212.3.106.249 - - [09/Jun/2012:18:12:41 +0100] "GET /openldap/htdocs HTTP/1.1" 404 381 "-" "-" 212.3.106.249 - - [09/Jun/2012:18:12:42 +0100] "GET /openldap/htdocs/ HTTP/1.1" 404 382 "-" "-" 212.3.106.249 - - [09/Jun/2012:18:12:44 +0100] "GET /ldap/ HTTP/1.1" 404 371 "-" "-" 212.3.106.249 - - [09/Jun/2012:18:12:44 +0100] "GET /ldap/htdocs/ HTTP/1.1" 404 378 "-" "-" 212.3.106.249 - - [09/Jun/2012:18:12:45 +0100] "GET /ldap/phpldapadmin/ HTTP/1.1" 404 384 "-" "-" 212.3.106.249 - - [09/Jun/2012:18:12:46 +0100] "GET /ldap/phpldapadmin/htdocs/ HTTP/1.1" 404 391 "-" "-" Is there any way I can use Fail2Ban or any other similar software to ban these IPs in situations when my server is being abused this way (by trying several "common" URLs)?

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  • Month in Geek: December 2010 Edition

    - by Asian Angel
    As 2010 draws to a close, we have gathered together another great batch of article goodness for your reading enjoyment. Here are our ten hottest articles for December. Note: Articles are listed as #10 through #1. The 50 Best How-To Geek Windows Articles of 2010 Even though we cover plenty of other topics, Windows has always been a primary focus around here, and we’ve got one of the largest collections of Windows-related how-to articles anywhere. Here’s the fifty best Windows articles that we wrote in 2010. Read the article Desktop Fun: Happy New Year Wallpaper Collection [Bonus Edition] As this year draws to a close, it is a time to reflect back on what we have done this year and to look forward to the new one. To help commemorate the event we have put together a bonus size edition of Happy New Year wallpapers for your desktops. Read the article LCD? LED? Plasma? The How-To Geek Guide to HDTV Technology With image technology progressing faster than ever, High-Def has become the standard, giving TV buyers more options at cheaper prices. But what’s different in all these confusing TVs, and what should you know before buying one? Read the article HTG Explains: Which Linux File System Should You Choose? File systems are one of the layers beneath your operating system that you don’t think about—unless you’re faced with the plethora of options in Linux. Here’s how to make an educated decision on which file system to use. Read the article Desktop Fun: Merry Christmas Fonts Christmas will soon be here and there are lots of cards, invitations, gift tags, photos, and more to prepare beforehand. To help you get ready we have gathered together a great collection of fun holiday fonts to help turn those ordinary looking holiday items into extraordinary looking ones. Read the article Microsoft Security Essentials 2.0 Kills Viruses Dead. Download It Now. Microsoft’s Security Essentials has been our favorite anti-malware application for a while—it’s free, unobtrusive, and it doesn’t slow your PC down, but now it’s even better with the new 2.0 release, which adds network filtering, heuristic protection, and more. Read the article 20 OS X Keyboard Shortcuts You Might Not Know Mastering the keyboard will not only increase your navigation speed but it can also help with wrist fatigue. Here are some lesser known OS X shortcuts to help you become a keyboard ninja. Read the article 20 Windows Keyboard Shortcuts You Might Not Know Mastering the keyboard will not only increase your navigation speed but it can also help with wrist fatigue. Here are some lesser known Windows shortcuts to help you become a keyboard ninja. Read the article The 50 Best Registry Hacks that Make Windows Better We’re big fans of hacking the Windows Registry around here, and we’ve got one of the biggest collections of registry hacks you’ll find. Don’t believe us? Here’s a list of the top 50 registry hacks that we’ve covered. Read the article The Complete List of iPad Tips, Tricks, and Tutorials The Apple iPad is an amazing tablet, and to help you get the most out of it, we’ve put together a comprehensive list of every tip, trick, and tutorial for you. Read on for more. Read the article Latest Features How-To Geek ETC The 20 Best How-To Geek Linux Articles of 2010 The 50 Best How-To Geek Windows Articles of 2010 The 20 Best How-To Geek Explainer Topics for 2010 How to Disable Caps Lock Key in Windows 7 or Vista How to Use the Avira Rescue CD to Clean Your Infected PC The Complete List of iPad Tips, Tricks, and Tutorials Tune Pop Enhances Android Music Notifications Another Busy Night in Gotham City Wallpaper Classic Super Mario Brothers Theme for Chrome and Iron Experimental Firefox Builds Put Tabs on the Title Bar (Available for Download) Android Trojan Found in the Wild Chaos, Panic, and Disorder Wallpaper

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  • This Week in Geek History: Gmail Goes Public, Deep Blue Wins at Chess, and the Birth of Thomas Edison

    - by Jason Fitzpatrick
    Every week we bring you a snapshot of the week in Geek History. This week we’re taking a peek at the public release of Gmail, the first time a computer won against a chess champion, and the birth of prolific inventor Thomas Edison. Gmail Goes Public It’s hard to believe that Gmail has only been around for seven years and that for the first three years of its life it was invite only. In 2007 Gmail dropped the invite only requirement (although they would hold onto the “beta” tag for another two years) and opened its doors for anyone to grab a username @gmail. For what seemed like an entire epoch in internet history Gmail had the slickest web-based email around with constant innovations and features rolling out from Gmail Labs. Only in the last year or so have major overhauls at competitors like Hotmail and Yahoo! Mail brought other services up to speed. Can’t stand reading a Week in Geek History entry without a random fact? Here you go: gmail.com was originally owned by the Garfield franchise and ran a service that delivered Garfield comics to your email inbox. No, we’re not kidding. Deep Blue Proves Itself a Chess Master Deep Blue was a super computer constructed by IBM with the sole purpose of winning chess matches. In 2011 with the all seeing eye of Google and the amazing computational abilities of engines like Wolfram Alpha we simply take powerful computers immersed in our daily lives for granted. The 1996 match against reigning world chest champion Garry Kasparov where in Deep Blue held its own, but ultimately lost, in a  4-2 match shook a lot of people up. What did it mean if something that was considered such an elegant and quintessentially human endeavor such as chess was so easy for a machine? A series of upgrades helped Deep Blue outright win a match against Kasparov in 1997 (seen in the photo above). After the win Deep Blue was retired and disassembled. Parts of Deep Blue are housed in the National Museum of History and the Computer History Museum. Birth of Thomas Edison Thomas Alva Edison was one of the most prolific inventors in history and holds an astounding 1,093 US Patents. He is responsible for outright inventing or greatly refining major innovations in the history of world culture including the phonograph, the movie camera, the carbon microphone used in nearly every telephone well into the 1980s, batteries for electric cars (a notion we’d take over a century to take seriously), voting machines, and of course his enormous contribution to electric distribution systems. Despite the role of scientist and inventor being largely unglamorous, Thomas Edison and his tumultuous relationship with fellow inventor Nikola Tesla have been fodder for everything from books, to comics, to movies, and video games. Other Notable Moments from This Week in Geek History Although we only shine the spotlight on three interesting facts a week in our Geek History column, that doesn’t mean we don’t have space to highlight a few more in passing. This week in Geek History: 1971 – Apollo 14 returns to Earth after third Lunar mission. 1974 – Birth of Robot Chicken creator Seth Green. 1986 – Death of Dune creator Frank Herbert. Goodnight Dune. 1997 – Simpsons becomes longest running animated show on television. Have an interesting bit of geek trivia to share? Shoot us an email to [email protected] with “history” in the subject line and we’ll be sure to add it to our list of trivia. Latest Features How-To Geek ETC Here’s a Super Simple Trick to Defeating Fake Anti-Virus Malware How to Change the Default Application for Android Tasks Stop Believing TV’s Lies: The Real Truth About "Enhancing" Images The How-To Geek Valentine’s Day Gift Guide Inspire Geek Love with These Hilarious Geek Valentines RGB? CMYK? Alpha? What Are Image Channels and What Do They Mean? Clean Up Google Calendar’s Interface in Chrome and Iron The Rise and Fall of Kramerica? [Seinfeld Video] GNOME Shell 3 Live CDs for OpenSUSE and Fedora Available for Testing Picplz Offers Special FX, Sharing, and Backup of Your Smartphone Pics BUILD! An Epic LEGO Stop Motion Film [VIDEO] The Lingering Glow of Sunset over a Winter Landscape Wallpaper

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  • Things to install on a new machine – revisited

    - by RoyOsherove
    as I prepare to get a new dev machine at work, I write the things I am going to install on it, before writing the first line of code on that machine: Control Freak Tools: Everything Search Engine – a free and amazingly fast search engine for files all over your machine. (just file names, not inside files). This is so fast I use it almost as a replacement for my start menu, but it’s also great for finding those files that get hidden and tucked away in dark places on my system. Ever had a situation where you needed to see exactly how many copies of X.dll were hiding on your machine and where? this tool is perfect for that. Google Chrome. It’s just fast. very fast. and Firefox has become the IE of alternative browsers in terms of speed and memory. Don’t even get me started on IE. TweetDeck – get a complete view of what’s up on twitter Total Commander – my still favorite file manager, over five years now. KatMouse – will scroll any window your hovering on, even if it’s not an active window, when you use scroll the wheel on it. PowerIso or Daemon Tools – for loading up ISO images of discs LogMeIn Ignition – quick access to your LogMeIn computers for online Backup: JungleDisk or BackBlaze KeePass – save important passwords MS Security Essentials – free anti virus that’s quoest and doesn’t make a mess of your system. for home: uTorrent – a torrent client that can read rss feeds (like the ones from ezrss.it ) Camtasia Studio and SnagIt – for recording and capturing the screen, and then adding cool effects on top. Foxit PDF Reader – much faster that adove reader. Toddler Keys (for home) – for when your baby wants to play with your keyboard. Live Writer – for writing blog posts for Lenovo ThinkPads – Lenovo System Update – if you have a “custom” system instead of the one that came built in, this will keep all your lenovo drivers up to date. FileZilla – for FTP stuff All the utils from sysinternals, (or try the live-links) especially: AutoRuns for deciding what’s really going to load at startup, procmon to see what’s really going on with processes in your system   Developer stuff: Reflector. Pure magic. Time saver. See source code of any compiled assembly. Resharper. Great for productivity and navigation across your source code FinalBuilder – a commercial build automation tool. Love it. much better than any xml based time hog out there. TeamCity – a great visual and friendly server to manage continuous integration. powerful features. Test Lint – a free addin for vs 2010 I helped create, that checks your unit tests for possible problems and hints you about it. TestDriven.NET – a great test runner for vs 2008 and 2010 with some powerful features. VisualSVN – a commercial tool if you use subversion. very reliable addin for vs 2008 and 2010 Beyond Compare – a powerful file and directory comparison tool. I love the fact that you can right click in windows exporer on any file and select “select left side to compare”, then right click on another file and select “compare with left side”. Great usability thought! PostSharp 2.0 – for addind system wide concepts into your code (tracing, exception management). Goes great hand in hand with.. SmartInspect – a powerful framework and viewer for tracing for your application. lots of hidden features. Crypto Obfuscator – a relatively new obfuscation tool for .NET that seems to do the job very well. Crypto Licensing – from the same company –finally a licensing solution that seems to really fit what I needed. And it works. Fiddler 2 – great for debugging and tracing http traffic to and from your app. Debugging Tools for Windows and DebugDiag  - great for debugging scenarios. still wanting more? I think this should keep you busy for a while.   Regulator and Regulazy – for testing and generating regular expressions Notepad 2 – for quick editing and viewing with syntax highlighting

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  • Last GUID used up - new ScottGuID unique ID to replace it

    - by Eilon
    You might have heard in recent news that the last ever GUID was used up. The GUID {FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF} was just consumed by a soon to be released project at Microsoft. Immediately after the GUID's creation the word spread around the Microsoft campuses around the globe. Microsoft's approximately 100,000 worldwide employees then started blogging, tweeting, and facebooking about the dubious "achievement." The following screenshot shows GUIDGEN (the Windows tool for creating GUIDs) with the last ever GUID. All GUIDs created by projects at Microsoft must be registered in a central repository for record keeping. This allows quick-fix engineers, security engineers, anti-malware developers, and testers to do a quick look up of an unknown GUID and find out if it belongs to Microsoft. The following screenshot shows the Microsoft GUID Tracker internal application and the last few GUIDs being used up by various Microsoft projects. What is perhaps more interesting than the news about the GUID is the project that used that last GUID. The recent announcements regarding the development experience for the Windows Phone 7 Series (WP7S) all involve free editions of Visual Studio 2010. One of the lesser known developer tools is based on a resurrected project that many of you are probably familiar with, but have never used. The tool is in fact Microsoft Bob 7 Series (MB7S). MB7S is an agent-based approach for mobile phone app development. The UI incorporates both natural language interfaces and motion gesture behaviors, similar to the Windows Phone 7 Series “Metro” interface. If it works, it will help to expand the breadth of mobile app developers. After the GUID: The ScottGuID It came as no big surprise that eventually the last GUID would be used up. Knowing this, a group of engineers at Microsoft has designed, implemented, and tested a replacement to the GUID: The ScottGuID. There are several core principles of the ScottGuID: 1. The concepts used in ScottGuIDs must be easily understood by a developer who is already familiar with GUIDs 2. There must exist a compatibility layer between ScottGuIDs and GUIDs 3. A ScottGuID must be usable in a practical manner in non-computing environments 4. There must exist ScottGuID APIs for all common platforms: Win32/Win64/WinCE, .NET (incl. Silverlight), Linux, FreeBSD, MacOS (incl. iPhone OS), Symbian, RIM BlackBerry, Google Android, etc. 5. ScottGuIDs must never run out ScottGuID use cases One of the more subtle principles of the ScottGuID is principle #3. While technically a GUID could be used in any environment, it was not practical to do so in terms of data entry and error detection. In order to have the ScottGuID be a true universal ID it must be usable in non-computing environments. Prior to the announcement of the ScottGuID there have been a number of until-now confidential projects. One of the tools that will soon become public is ScottGuIDGen, which is in essence an updated version of GUIDGEN that can create ScottGuIDs. The following screenshot shows a sample ScottGuID. To demonstrate the various applications of the ScottGuID there were test deployments around the globe. The following examples are a small showcase of the applications that have already been prototyped. Log in to Hotmail: Pay for gas: Sign in to Twitter: Dispense cat food: Conclusion I hope that this brief introduction to the ScottGuID shows how technology can continue to move forward, even when it appears there is a point that cannot be passed. With a small number of principles, a team of smart engineers, and a passion for "getting it right" the ScottGuID should last well past our lifetimes. In the coming months expect further announcements regarding additional developer tools, samples, whitepapers, podcasts, and videos. Please leave a comment on this post if you have any questions about the ScottGuID or what you would like to see us do with it. With ScottGuID, the possibilities are nearly endless and we want to stretch their reach as far as possible.

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  • wcf http 504: Working on a mystery

    - by James Fleming
    Ok,  So you're here because you've been trying to solve the mystery of why you're getting a 504 error. If you've made it to this lonely corner of the Internet, then the advice you're getting from other bloggers isn't the answer you are after. It wasn't the answer I needed either, so once I did solve my problem, I thought I'd share the answer with you. For starters, if by some miracle, you landed here first you may not already know that the 504 error is NOT coming from IIS or Casini, that response code is coming from Fiddler. HTTP/1.1 504 Fiddler - Receive Failure Content-Type: text/html Connection: close Timestamp: 09:43:05.193 ReadResponse() failed: The server did not return a response for this request.       The take away here is Fiddler won't help you with the diagnosis and any further digging in that direction is a red herring. Assuming you've dug around a bit, you may have arrived at posts which suggest you may be getting the error because you're trying to hump too much data over the wire, and have an urgent need to employ an anti-pattern: due to a special case: http://delphimike.blogspot.com/2010/01/error-504-in-wcfnet-35.html Or perhaps you're experiencing wonky behavior using WCF-CustomIsolated Adapter on Windows Server 2008 64bit environment, in which case the rather fly MVP Dwight Goins' advice is what you need. http://dgoins.wordpress.com/2009/12/18/64bit-wcf-custom-isolated-%E2%80%93-rest-%E2%80%93-%E2%80%9C504%E2%80%9D-response/ For me, none of that was helpful. I could perform a get on a single record  http://localhost:8783/Criterion/Skip(0)/Take(1) but I couldn't get more than one record in my collection as in:  http://localhost:8783/Criterion/Skip(0)/Take(2) I didn't have a big payload, or a large number of objects (as you can see by the size of one record below) - - A-1B f5abd850-ec52-401a-8bac-bcea22c74138 .biological/legal mother This item refers to the supervisor’s evaluation of the caseworker’s ability to involve the biological/legal mother in the permanency planning process. 75d8ecb7-91df-475f-aa17-26367aeb8b21 false true Admin account 2010-01-06T17:58:24.88 1.20 764a2333-f445-4793-b54d-1c3084116daa So while I was able to retrieve one record without a hitch (thus the record above) I wasn't able to return multiple records. I confirmed I could get each record individually, (Skip(1)/Take(1))so it stood to reason the problem wasn't with the data at all, so I suspected a serialization error. The first step to resolving this was to enable WCF Tracing. Instructions on how to set it up are here: http://msdn.microsoft.com/en-us/library/ms733025.aspx. The tracing log led me to the solution. The use of type 'Application.Survey.Model.Criterion' as a get-only collection is not supported with NetDataContractSerializer.  Consider marking the type with the CollectionDataContractAttribute attribute or the SerializableAttribute attribute or adding a setter to the property. So I was wrong (but close!). The problem was a deserializing issue in trying to recreate my read only collection. http://msdn.microsoft.com/en-us/library/aa347850.aspx#Y1455 So looking at my underlying model, I saw I did have a read only collection. Adding a setter was all it took.         public virtual ICollection<string> GoverningResponses         {             get             {                 if (!string.IsNullOrEmpty(GoverningResponse))                 {                     return GoverningResponse.Split(';');                 }                 else                     return null;             }                  } Hope this helps. If it does, post a comment.

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  • Revisioning the CeBIT 2011

    - by hechtsuppe
    Hey guys, I am living in the CeBIT's hometown, the beautiful city Hanover. So I am visiting this exhibition since 2002 and I've seen a lot of changes during all this time. But this time, it was the most boring fair I've ever seen. Lets start with the first halls: "The same procedure as every year"- directly behind the entrance are the exhibitioners from far east (China, Taiwan...). In the past, they've shown a lot of nice toys. But this time, they got very serious, the only great gimmick was the motorcycle suitcase for the iPad, I watched the presentation until I reminded myself that I am not owning an iPad and these cases weren't suitable for my BMW motorcycle. So I started looking for the business stuff (I was there for business). I walked deeper in the exhibition area: During the way to the business halls, I came across a hall where I heard a big bass- the gamer's hall I think so I made a quick getaway from there. I saw a lot of teenagers with gaming bags on thier shoulders and I was really confused. I thought 'Damn it is tuesday 11:00 am, the trade fair is opened for public on saturday, why they are here and not at school?'. So the german schools seem to be too easy for students. At the time I was a pupil I visited the CeBIT on saturday! At the business halls: I visited IBM's booth but there were only guys looking like penguins and I weared a white chemise. So nobody was interested in talking to me. At the coffeebar I met a very nice guy from Bangladesh I think he was round about 25, but he told me that he was the first time in germany and he thought that germans are still nazis. I laughed at him and went to DELL. I was really really really interested in client solutions from DELL because I want to get away from our current client manufacturer. At the DELL booth I became recognized and a really nice guy told me where to use which client products. But there were too many people for trying the notebooks so the DELL guy asked for my business card. But I am still waiting for information, dear 'DELL dude'. I went to the Microsoft booth for informing myself about new IT trends. There were nothig new, only a few presentations about the 'new' Windows Live, Windows Phone 7 and 'the allmighty cloud'. But there was a very small presentation corner with the title 'geeks corner'. A guy inside the 'geeks corner' started Visual Studio 2010, I was really agog for the presentation. But then he started talking about Windows Phone 7 and how to program. He began with drag'n drop a textbox and a button on the form. He wrote really basic code and explained the functionality of a textbox- then I stood up and left the room. At the end: Before leaving the fairground, I've visited a few small booths and the big anti-virus program companies. But there was nothing new, I was really disappointed  this year. I've seen only ten exhibition babes and the rest of the week I stood ~3 hours in traffic jams. But I really love the flair in the whole town during this exhibition. The people in the city railways, which are really confused and the people in the pubs. Cheers Vince

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  • IE9, HTML5 and truck load of other stuff happening around the web

    - by Harish Ranganathan
    First of all, I haven’t been updating this blog as regularly as it used to be.  Primarily, due to the fact was I was visiting a lot of cities talking about SharePoint, Web Matrix, IE9 and few other stuff.  IE9 is my new found love and I simply think we have done great work in improving the browser and browsing experiences for our users. This post would talk about IE, general things happening around the web and few misconceptions around IE (I had earlier written about IE8 and common myths When you think about the way web has transformed, its truly amazing.  Rewind back to late 90s and early 2000s, web was a luxury.  There were lot of desktop applications running around and web applications was starting to pick up.  Primarily reason was not a lot of folks were into web development and the areas of web were confined to HTML and JavaScript.  CSS was around here and there but no one took it so seriously.  XML, XSLT was fast picking up and contributed to decent web development techniques. So as a web developer all we had to worry about was, building good looking websites which worked well with IE6 and occasionally with Safari.  Firefox was  not even in the picture then and so was Chrome.  But with the various arms of W3C consortium and other bodies working actively on stuff like CSS, SVG and XHTML, few more areas came into picture when it comes to browsers supporting standards.  IE6 for sure wasn’t up to the speed and the main issue we were tackling then was privacy and piracy.  We did invest a lot of our efforts to curb piracy and one of the steps into it was that, IE7 the next version of IE would install only on genuine windows machines.  What this means, is that, people who were running pirated windows xp knowingly/unknowingly could not install IE7 and the limitations of IE6 really hurt them.  One more thing of importance is that, if you were running pirated windows, lots of chances that you didn’t get the security updates and thereby were vulnerable to run viruses/trojans on your system. Many of them actually block using IE in the first place and make it difficult to browse.  SP2 came as a big boon but again was there only for genuine windows machines. With Firefox coming as a free install and also heavily pushed by Google then, it was natural that people would try an alternative.  By then, we had started working on IE8 supporting the best standards (note HTML5, CSS 2.1 and other specs were then work in progress.  they are still) Later, Google in their infinite wisdom realized that with Firefox they were going nowhere and they released Chrome.  Now, they heavily push Chrome even for Firefox users, which is natural since its their browser. In the meanwhile, these browsers push their updates as mandatory and therefore have a very short lifecycle to add enhancements and support for stuff like CSS etc., Meanwhile, when IE8 came out, it really was the best standards supported browser and a lot of people saw our efforts in improving our browser. HTML5 is the buzz word in the industry and there is a lot of noise being made by many browsers claiming their support for it.  IE8 doesn’t have much support for HTML5.  But, with IE9 Beta, we have great support for many of HTML5 specifications.  Note that, HTML5 is still work under progress and one of the board of members working on the spec has mentioned that these specs might change and relying on them heavily is dangerous.  But, some of the advances such as video tag, etc., are indeed supported in IE9 Beta.  IE9 Beta also has full hardware acceleration support which other browsers don’t have. IE8 had advanced security features such as smartscreen filter, in-private browsing, anti-phishing and a lot of other stuff.  IE9 builds on top of these with the best in town security standards as well as support for HTML5, CSS3, Hardware acceleration, SVG and many other advancements in browser.  Read more at http://www.beautyoftheweb.com/#/highlights/html5  To summarize, IE9 Beta is really innovative and you should try it to believe what it provides.  You can visit http://www.beautyoftheweb.com/  to install as well as read more on this. Cheers !!!

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  • C#: A "Dumbed-Down" C++?

    - by James Michael Hare
    I was spending a lovely day this last weekend watching my sons play outside in one of the better weekends we've had here in Saint Louis for quite some time, and whilst watching them and making sure no limbs were broken or eyes poked out with sticks and other various potential injuries, I was perusing (in the correct sense of the word) this month's MSDN magazine to get a sense of the latest VS2010 features in both IDE and in languages. When I got to the back pages, I saw a wonderful article by David S. Platt entitled, "In Praise of Dumbing Down"  (msdn.microsoft.com/en-us/magazine/ee336129.aspx).  The title captivated me and I read it and found myself agreeing with it completely especially as it related to my first post on divorcing C++ as my favorite language. Unfortunately, as Mr. Platt mentions, the term dumbing-down has negative connotations, but is really and truly a good thing.  You are, in essence, taking something that is extremely complex and reducing it to something that is much easier to use and far less error prone.  Adding safeties to power tools and anti-kick mechanisms to chainsaws are in some sense "dumbing them down" to the common user -- but that also makes them safer and more accessible for the common user.  This was exactly my point with C++ and C#.  I did not mean to infer that C++ was not a useful or good language, but that in a very high percentage of cases, is too complex and error prone for the job at hand. Choosing the correct programming language for a job is a lot like choosing any other tool for a task.  For example: if I want to dig a French drain in my lawn, I can attempt to use a huge tractor-like backhoe and the job would be done far quicker than if I would dig it by hand.  I can't deny that the backhoe has the raw power and speed to perform.  But you also cannot deny that my chances of injury or chances of severing utility lines or other resources climb at an exponential rate inverse to the amount of training I may have on that machinery. Is C++ a powerful tool?  Oh yes, and it's great for those tasks where speed and performance are paramount.  But for most of us, it's the wrong tool.  And keep in mind, I say this even though I have 17 years of experience in using it and feel myself highly adept in utilizing its features both in the standard libraries, the STL, and in supplemental libraries such as BOOST.  Which, although greatly help with adding powerful features quickly, do very little to curb the relative dangers of the language. So, you may say, the fault is in the developer, that if the developer had some higher skills or if we only hired C++ experts this would not be an issue.  Now, I will concede there is some truth to this.  Obviously, the higher skilled C++ developers you hire the better the chance they will produce highly performant and error-free code.  However, what good is that to the average developer who cannot afford a full stable of C++ experts? That's my point with C#:  It's like a kinder, gentler C++.  It gives you nearly the same speed, and in many ways even more power than C++, and it gives you a much softer cushion for novices to fall against if they code less-than-optimally.  A bug is a bug, of course, in any language, but C# does a good job of hiding and taking on the task of handling almost all of the resource issues that make C++ so tricky.  For my money, C# is much more maintainable, more feature-rich, second only slightly in performance, faster to market, and -- last but not least -- safer and easier to use.  That's why, where I work, I much prefer to see the developers moving to C#.  The quantity of bugs is much lower, and we don't need to hire "experts" to achieve the same results since the language itself handles those resource pitfalls so prevalent in poorly written C++ code.  C++ will still have its place in the world, and I'm sure I'll still use it now and again where it is truly the correct tool for the job, but for nearly every other project C# is a wonderfully "dumbed-down" version of C++ -- in the very best sense -- and to me, that's the smart choice.

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  • How to Make the Gnome Panels in Ubuntu Totally Transparent

    - by The Geek
    We all love transparency, since it makes your desktop so beautiful and lovely—so today we’re going to show you how to apply transparency to the panels in your Ubuntu Gnome setup. It’s an easy process, and here’s how to do it. This article is the first part of a multi-part series on how to customize the Ubuntu desktop, written by How-To Geek reader and ubergeek, Omar Hafiz. Making the Gnome Panels Transparent Of course we all love transparency, It makes your desktop so beautiful and lovely. So you go for enabling transparency in your panels , you right click on your panel, choose properties, go to the Background tab and make your panel transparent. Easy right? But instead of getting a lovely transparent panel, you often get a cluttered, ugly panel like this: Fortunately it can be easily fixed, all we need to do is to edit the theme files. If your theme is one of those themes that came with Ubuntu like Ambiance then you’ll have to copy it from /usr/share/themes to your own .themes directory in your Home Folder. You can do so by typing the following command in the terminal cp /usr/share/themes/theme_name ~/.themes Note: don’t forget to substitute theme_name with the theme name you want to fix. But if your theme is one you downloaded then it is already in your .themes folder. Now open your file manager and navigate to your home folder then do to .themes folder. If you can’t see it then you probably have disabled the “View hidden files” option. Press Ctrl+H to enable it. Now in .themes you’ll find your previously copied theme folder there, enter it then go to gtk-2.0 folder. There you may find a file named “panel.rc”, which is a configuration file that tells your panel how it should look like. If you find it there then rename it to “panel.rc.bak”. If you don’t find don’t panic! There’s nothing wrong with your system, it’s just that your theme decided to put the panel configurations in the “gtkrc” file. Open this file with your favorite text editor and at the end of the file there is line that looks like this “include “apps/gnome-panel.rc””. Comment out this line by putting a hash mark # in front of it. Now it should look like this “# include “apps/gnome-panel.rc”” Save and exit the text editor. Now change your theme to any other one then switch back to the one you edited. Now your panel should look like this: Stay tuned for the second part in the series, where we’ll cover how to change the color and fonts on your panels. Latest Features How-To Geek ETC How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Here’s a Super Simple Trick to Defeating Fake Anti-Virus Malware How to Change the Default Application for Android Tasks Stop Believing TV’s Lies: The Real Truth About "Enhancing" Images The Legend of Zelda – 1980s High School Style [Video] Suspended Sentence is a Free Cross-Platform Point and Click Game Build a Batman-Style Hidden Bust Switch Make Your Clock Creates a Custom Clock for your Android Homescreen Download the Anime Angels Theme for Windows 7 CyanogenMod Updates; Rolls out Android 2.3 to the Less Fortunate

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  • Why Apple’s New SDK Limitation is So Offensive

    - by TStewartDev
    I am not an Apple fanboy, nor have I ever been. However, I have owned a Mac, an iPod, and an iPhone in my lifetime, and for more than a decade, I have defended Apple against the untruths that the haters so enjoy spewing. I encouraged my wife to buy a MacBook when she needed a new laptop two years ago, and I often recommend them to my friends and relatives. I have proudly and happily used my first generation iPhone for nearly three years. Now, for the first time in well over ten years, I find myself ready to swear off Apple and encourage everyone I know to do the same. I was disappointed when Apple wouldn't allow native apps, but I still bought the iPhone. I've stomached their ambiguous app approval process even though it's apparent that Steve may just reject your app because he doesn't like you or feels threatened by you (I'm still lamenting the rejection of the Google Voice app). But, as a developer, I can no longer tolerate Apple's terms and the kind of totalitarian control they indicate Apple wants. In case you are not already familiar, Apple has dictated in their OS 4.0 SDK license agreement (the now infamous Section 3.3.1) that all apps developed for the iPhone must be coded in C, C++, or Objective C, and moreover, that using any cross-compiling platforms is a violation of the agreement. For those of you who aren't developers, let me try to illustrate why this angers those of us who are. Imagine you're a professional writer. You've had articles published in some journals and magazines, and you've got a couple popular books out there, too. You've got an idea for a new book, and so you take it to your publisher. Your publisher agrees that it's a good idea. "But," says the publisher, "we want to hold our books to a tighter standard so that our readers get the experience we want them to have. Therefore, from now on, all our writers may only use words from this list of the 10,000 most common English words. Furthermore, if you cite any other works or quote anyone, they must comply with that same list, or you'll have to rewrite the entire work as well in case our readers want to look up your citation." What do you do? If your work is a children's book, this probably isn't a big deal to you. If it's an autobiography, textbook, or even a novel, though, you're going to have a lot of trouble describing your content with only common words. It's going to take you longer to complete your book, too, since you'll be looking up less common words frequently to see if you can use them. You could always go to another publisher, but this one has the best ability to distribute your book. The next largest distributor can only do a quarter as much. You could abandon the project altogether, but then everyone loses. Isn't this a silly scenario? Who would put such a limitation on writers? Yet this is very much what Apple is doing. They are using their dominant position in the market to coerce developers to write their apps exclusively for the iPhone OS by making it too expensive to write for multiple platforms. It is at least a threefold attack, striking at Adobe who is set to release a compiler that lets Flash source be compiled to iPhone binaries; striking at Google whose Android platform stands the best chance at the moment of providing serious competition to the iPhone; and reinforcing their own strong position by keeping popular apps exclusively to iPhone. And while developers are already very upset about this, the sad fact is that most of us will cave and give in to Apple because consumers don't know any better. They will continue to buy Apple's toy forcing developers to play Apple's maniacal game in order to make any money, at least until Steve Jobs decides he doesn't like them or he intends to release a competing application (bye-bye OpenFeint). Apple has been kept in check on the desktop front by a very dominant Microsoft, but I'm afraid that their success with iPods, iTunes, and iPhones has created a monster that we may have to bear until it is slain by an anti-trust suit or dies with the retirement of Steve Jobs.

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  • Resolving collisions between dynamic game objects

    - by TheBroodian
    I've been building a 2D platformer for some time now, I'm getting to the point where I am adding dynamic objects to the stage for testing. This has prompted me to consider how I would like my character and other objects to behave when they collide. A typical staple in many 2D platformer type games is that the player takes damage upon touching an enemy, and then essentially becomes able to pass through enemies during a period of invulnerability, and at the same time, enemies are able to pass through eachother freely. I personally don't want to take this approach, it feels strange to me that the player should receive arbitrary damage for harmless contact to an enemy, despite whether the enemy is attacking or not, and I would like my enemies' interactions between each other (and my player) to be a little more organic, so to speak. In my head I sort of have this idea where a game object (player, or non player) would be able to push other game objects around by manner of 'pushing' each other out of one anothers' bounding boxes if there is an intersection, and maybe correlate the repelling force to how much their bounding boxes are intersecting. The problem I'm experiencing is I have no idea what the math might look like for something like this? I'll show what work I've done so far, it sort of works, but it's jittery, and generally not quite what I would pass in a functional game: //Clears the anti-duplicate buffer collisionRecord.Clear(); //pick a thing foreach (GameObject entity in entities) { //pick another thing foreach (GameObject subject in entities) { //check to make sure both things aren't the same thing if (!ReferenceEquals(entity, subject)) { //check to see if thing2 is in semi-near proximity to thing1 if (entity.WideProximityArea.Intersects(subject.CollisionRectangle) || entity.WideProximityArea.Contains(subject.CollisionRectangle)) { //check to see if thing2 and thing1 are colliding. if (entity.CollisionRectangle.Intersects(subject.CollisionRectangle) || entity.CollisionRectangle.Contains(subject.CollisionRectangle) || subject.CollisionRectangle.Contains(entity.CollisionRectangle)) { //check if we've already resolved their collision or not. if (!collisionRecord.ContainsKey(entity.GetHashCode())) { //more duplicate resolution checking. if (!collisionRecord.ContainsKey(subject.GetHashCode())) { //if thing1 is traveling right... if (entity.Velocity.X > 0) { //if it isn't too far to the right... if (subject.CollisionRectangle.Contains(new Microsoft.Xna.Framework.Rectangle(entity.CollisionRectangle.Right, entity.CollisionRectangle.Y, 1, entity.CollisionRectangle.Height)) || subject.CollisionRectangle.Intersects(new Microsoft.Xna.Framework.Rectangle(entity.CollisionRectangle.Right, entity.CollisionRectangle.Y, 1, entity.CollisionRectangle.Height))) { //Find how deep thing1 is intersecting thing2's collision box; float offset = entity.CollisionRectangle.Right - subject.CollisionRectangle.Left; //Move both things in opposite directions half the length of the intersection, pushing thing1 to the left, and thing2 to the right. entity.Velocities.Add(new Vector2(-(((offset * 4) * (float)gameTime.ElapsedGameTime.TotalMilliseconds)), 0)); subject.Velocities.Add(new Vector2((((offset * 4) * (float)gameTime.ElapsedGameTime.TotalMilliseconds)), 0)); } } //if thing1 is traveling left... if (entity.Velocity.X < 0) { //if thing1 isn't too far left... if (entity.CollisionRectangle.Contains(new Microsoft.Xna.Framework.Rectangle(subject.CollisionRectangle.Right, subject.CollisionRectangle.Y, 1, subject.CollisionRectangle.Height)) || entity.CollisionRectangle.Intersects(new Microsoft.Xna.Framework.Rectangle(subject.CollisionRectangle.Right, subject.CollisionRectangle.Y, 1, subject.CollisionRectangle.Height))) { //Find how deep thing1 is intersecting thing2's collision box; float offset = subject.CollisionRectangle.Right - entity.CollisionRectangle.Left; //Move both things in opposite directions half the length of the intersection, pushing thing1 to the right, and thing2 to the left. entity.Velocities.Add(new Vector2((((offset * 4) * (float)gameTime.ElapsedGameTime.TotalMilliseconds)), 0)); subject.Velocities.Add(new Vector2(-(((offset * 4) * (float)gameTime.ElapsedGameTime.TotalMilliseconds)), 0)); } } //Make record that thing1 and thing2 have interacted and the collision has been solved, so that if thing2 is picked next in the foreach loop, it isn't checked against thing1 a second time before the next update. collisionRecord.Add(entity.GetHashCode(), subject.GetHashCode()); } } } } } } } } One of the biggest issues with my code aside from the jitteriness is that if one character were to land on top of another character, it very suddenly and abruptly resolves the collision, whereas I would like a more subtle and gradual resolution. Any thoughts or ideas are incredibly welcome and helpful.

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  • Don’t string together XML

    - by KyleBurns
    XML has been a pervasive tool in software development for over a decade.  It provides a way to communicate data in a manner that is simple to understand and free of platform dependencies.  Also pervasive in software development is what I consider to be the anti-pattern of using string manipulation to create XML.  This usually starts with a “quick and dirty” approach because you need an XML document and looks like (for all of the examples here, we’ll assume we’re writing the body of a method intended to take a Contact object and return an XML string): return string.Format("<Contact><BusinessName>{0}</BusinessName></Contact>", contact.BusinessName);   In the code example, I created (or at least believe I created) an XML document representing a simple contact object in one line of code with very little overhead.  Work’s done, right?  No it’s not.  You see, what I didn’t realize was that this code would be used in the real world instead of my fantasy world where I own all the data and can prevent any of it containing problematic values.  If I use this code to create a contact record for the business “Sanford & Son”, any XML parser will be incapable of processing the data because the ampersand is special in XML and should have been encoded as &amp;. Following the pattern that I have seen many times over, my next step as a developer is going to be to do what any developer in his right mind would do – instruct the user that ampersands are “bad” and they cannot be used without breaking computers.  This may work in many cases and is often accompanied by logic at the UI layer of applications to block these “bad” characters, but sooner or later someone is going to figure out that other applications allow for them and will want the same.  This often leads to the creation of “cleaner” functions that perform a replace on the strings for every special character that the person writing the function can think of.  The cleaner function will usually grow over time as support requests reveal characters that were missed in the initial cut.  Sooner or later you end up writing your own somewhat functional XML engine. I have never been told by anyone paying me to write code that they would like to buy a somewhat functional XML engine.  My employer/customer’s needs have always been for something that may use XML, but ultimately is functionality that drives business value. I’m not going to build an XML engine. So how can I generate XML that is always well-formed without writing my own engine?  Easy – use one of the ones provided to you for free!  If you’re in a shop that still supports VB6 applications, you can use the DomDocument or MXXMLWriter object (of the two I prefer MXXMLWriter, but I’m not going to fully describe either here).  For .Net Framework applications prior to the 3.5 framework, the code is a little more verbose than I would like, but easy once you understand what pieces are required:             using (StringWriter sw = new StringWriter())             {                 using (XmlTextWriter writer = new XmlTextWriter(sw))                 {                     writer.WriteStartDocument();                     writer.WriteStartElement("Contact");                     writer.WriteElementString("BusinessName", contact.BusinessName);                     writer.WriteEndElement(); // end Contact element                     writer.WriteEndDocument();                     writer.Flush();                     return sw.ToString();                 }             }   Looking at that code, it’s easy to understand why people are drawn to the initial one-liner.  Lucky for us, the 3.5 .Net Framework added the System.Xml.Linq.XElement object.  This object takes away a lot of the complexity present in the XmlTextWriter approach and allows us to generate the document as follows: return new XElement("Contact", new XElement("BusinessName", contact.BusinessName)).ToString();   While it is very common for people to use string manipulation to create XML, I’ve discussed here reasons not to use this method and introduced powerful APIs that are built into the .Net Framework as an alternative.  I’ve given a very simplistic example here to highlight the most basic XML generation task.  For more information on the XmlTextWriter and XElement APIs, check out the MSDN library.

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  • Webcast On-Demand: Building Java EE Apps That Scale

    - by jeckels
    With some awesome work by one of our architects, Randy Stafford, we recently completed a webcast on scaling Java EE apps efficiently. Did you miss it? No problem. We have a replay available on-demand for you. Just hit the '+' sign drop-down for access.Topics include: Domain object caching Service response caching Session state caching JSR-107 HotCache and more! Further, we had several interesting questions asked by our audience, and we thought we'd share a sampling of those here for you - just in case you had the same queries yourself. Enjoy! What is the largest Coherence deployment out there? We have seen deployments with over 500 JVMs in the Coherence cluster, and deployments with over 1000 JVMs using the Coherence jar file, in one system. On the management side there is an ecosystem of monitoring tools from Oracle and third parties with dashboards graphing values from Coherence's JMX instrumentation. For lifecycle management we have seen a lot of custom scripting over the years, but we've also integrated closely with WebLogic to leverage its management ecosystem for deploying Coherence-based applications and managing process life cycles. That integration introduces a new Java EE archive type, the Grid Archive or GAR, which embeds in an EAR and can be seen by a WAR in WebLogic. That integration also doesn't require any extra WebLogic licensing if Coherence is licensed. How is Coherence different from a NoSQL Database like MongoDB? Coherence can be considered a NoSQL technology. It pre-dates the NoSQL movement, having been first released in 2001 whereas the term "NoSQL" was coined in 2009. Coherence has a key-value data model primarily but can also be used for document data models. Coherence manages data in memory currently, though disk persistence is in a future release currently in beta testing. Where the data is managed yields a few differences from the most well-known NoSQL products: access latency is faster with Coherence, though well-known NoSQL databases can manage more data. Coherence also has features that well-known NoSQL database lack, such as grid computing, eventing, and data source integration. Finally Coherence has had 15 years of maturation and hardening from usage in mission-critical systems across a variety of industries, particularly financial services. Can I use Coherence for local caching? Yes, you get additional features beyond just a java.util.Map: you get expiration capabilities, size-limitation capabilities, eventing capabilites, etc. Are there APIs available for GoldenGate HotCache? It's mostly a black box. You configure it, and it just puts objects into your caches. However you can treat it as a glass box, and use Coherence event interceptors to enhance its behavior - and there are use cases for that. Are Coherence caches updated transactionally? Coherence provides several mechanisms for concurrency control. If a project insists on full-blown JTA / XA distributed transactions, Coherence caches can participate as resources. But nobody does that because it's a performance and scalability anti-pattern. At finer granularity, Coherence guarantees strict ordering of all operations (reads and writes) against a single cache key if the operations are done using Coherence's "EntryProcessor" feature. And Coherence has a unique feature called "partition-level transactions" which guarantees atomic writes of multiple cache entries (even in different caches) without requiring JTA / XA distributed transaction semantics.

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  • Frame Buster Buster ... buster code needed

    - by Jeff Atwood
    Let's say you don't want other sites to "frame" your site in an <iframe>: <iframe src="http://yourwebsite.com"></iframe> So you insert anti-framing, frame busting JavaScript into all your pages: /* break us out of any containing iframes */ if (top != self) { top.location.replace(self.location.href); } Excellent! Now you "bust" or break out of any containing iframe automatically. Except for one small problem. As it turns out, your frame-busting code can be busted, as shown here: <script type="text/javascript"> var prevent_bust = 0 window.onbeforeunload = function() { prevent_bust++ } setInterval(function() { if (prevent_bust > 0) { prevent_bust -= 2 window.top.location = 'http://server-which-responds-with-204.com' } }, 1) </script> This code does the following: increments a counter every time the browser attempts to navigate away from the current page, via the window.onbeforeonload event handler sets up a timer that fires every millisecond via setInterval(), and if it sees the counter incremented, changes the current location to a server of the attacker's control that server serves up a page with HTTP status code 204, which does not cause the browser to nagivate anywhere My question is -- and this is more of a JavaScript puzzle than an actual problem -- how can you defeat the frame-busting buster? I had a few thoughts, but nothing worked in my testing: attempting to clear the onbeforeunload event via onbeforeonload = null had no effect adding an alert() stopped the process let the user know it was happening, but did not interfere with the code in any way; clicking OK lets the busting continue as normal I can't think of any way to clear the setInterval() timer I'm not much of a JavaScript programmer, so here's my challenge to you: hey buster, can you bust the frame-busting buster?

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  • Session variables with Cucumber Stories

    - by Matthew Savage
    I am working on some Cucumber stories for a 'sign up' application which has a number of steps. Rather then writing a Huuuuuuuge story to cover all the steps at once, which would be bad, I'd rather work through each action in the controller like a regular user. My problem here is that I am storing the account ID which is created in the first step as a session variable, so when step 2, step 3 etc are visited the existing registration data is loaded. I'm aware of being able to access controller.session[..] within RSpec specifications however when I try to do this in Cucumber stories it fails with the following error (and, I've also read somewhere this is an anti-pattern etc...): Using controller.session[:whatever] or session[:whatever] You have a nil object when you didn't expect it! The error occurred while evaluating nil.session (NoMethodError) Using session(:whatever) wrong number of arguments (1 for 0) (ArgumentError) So, it seems accession the session store isn't really possible. What I'm wondering is if it might be possible to (and I guess which would be best..): Mock out the session store etc Have a method within the controller and stub that out (e.g. get_registration which assigns an instance variable...) I've looked through the RSpec book (well, skimmed) and had a look through WebRat etc, but I haven't really found an answer to my problem... To clarify a bit more, the signup process is more like a state machine - e.g. the user progresses through four steps before the registration is complete - hence 'logging in' isn't really an option (it breaks the model of how the site works)... In my spec for the controller I was able to stub out the call to the method which loads the model based on the session var - but I'm not sure if the 'antipattern' line also applies to stubs as well as mocks? Thanks!

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  • Problem in IE8 with GET Parameters in opening a new windows with javascript.

    - by amfa95
    Hi, I have a problem with IE8 and the opening of a new window with javascript and submitting parameters with special characters. <a href="javascript:oWin('/html/de/4664286/printregistrationcontent.html?12-security question&#61;Wie hei&#223;t Ihr Lieblingsrestaurant','PRINT',800,600);" class="print">Seite drucken</a> The Problem is the letter 'ß' (sharp S). As you can see the string above is encodes due to anti XSS. This link works in FF and IE6 but IE8 is transmitting the URL Parameter as character with code 65*** (don't know the exaxt value). In the opening window you will only see a square (because character with 65000+ is not printable). I also tried to use URL Encoding instead of HTML encoding <a href="javascript:oWin('/html/de/4664286/printregistrationcontent.html?12-security question%3DWie hei%C3%9Ft Ihr Lieblingsrestaurant','PRINT',800,600);" class="print">Seite drucken</a> If i click on this Link in FF or IE6 it works as expected, but IE8 will fail to transmit the "ß" to the server and therefor will also get it back in the wrong way. If i paste this url to the IE8 it will work too, but not if the window is opened by javascript. The Javascript function oWin is defined as follows function oWin(url,title,sizeH,sizeV) { winHandle = top.open(url,title,'toolbar=no,directories=no,status=yes,scrollbars=yes,menubar=no,resizable=no,width='+sizeH+',height='+sizeV); if(navigator.appVersion.indexOf("MSIE 3",0)==-1) id = setTimeout('winHandle.focus()',1000); } If someone has an idea where to look for the reason please answer to this. Thank you amfa

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  • identation control while developing a small python like language

    - by sap
    Hello, Im developing a small python like language using flex, byacc (for lexical and parsing) and C++, but i have a few questions regarding scope control. just as python it uses white spaces (or tabs) for identation, not only that but i want to implement index breaking like for instance if you type "break 2" inside a while loop thats inside another while loop it would not only break from the last one but from the first loop as well (hence the number 2 after break) and so on. example: while 1 while 1 break 2 end end #after break 2 it would jump right here but since i dont have an "anti" tab character to check when a scope ends (like C for example i would just use the '}' char) i was wondering if this method would the the best: i would define a global variable, like "int tabIndex" on my yacc file that i would access in my lex file using extern. then everytime i find a tab character on my lex file i would increment that variable by 1. when parsing on my yacc file if i find a "break" keyword i would decrement by the amount typed after it from the tabIndex variable, and when i reach and EOF after compiling and i get a tabIndex != 0 i would output compilation error. now the problem is, whats the best way to see if the identation got reduced, should i read \b (backspace) chars from lex and then reduce the tabIndex variable (when the user doesnt use break)? another method to achieve this? also just another small question, i want every executable to have its starting point on the function called start() should i hardcode this onto my yacc file? sorry for the long question any help is greatly appretiated. also if someone can provide an yacc file for python would be nice as a guideline (tried looking on google and had no luck). thanks in advance.

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  • Apache unresponsive on Vista [closed]

    - by William Hudson
    I had been running Apache on Vista for around a year, but recently upgraded my workstation. I did a clean install of Vista Ultimate and installed the latest version of the Apache server for win32 (2.2.11, no SSL). The service runs fine and there were no errors reported during the install, nor are there any errors in the Apache logs. However, any attempt to access the web site on localhost (or 127.0.0.1) just hangs the browser. I have used netstat to check who is listening to port 80 and it shows httpd.exe. I have also tried adjusting the .conf file to use port 8080 but this had no effect either (except to change the netstat output). This is a development system with quite a few other pieces of software installed. However, when I tried installing IIS, it worked fine (I removed it soon after before reattempting the Apache install). Using the older 2.0 version of Apache has no effect. Windows firewall is not running. I have disabled my NOD32 anti-virus. Any ideas what is going on? Regards, William

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  • Soft Paint Bucket Fill: Colour Equality

    - by Bart van Heukelom
    I'm making a small app where children can fill preset illustrations with colours. I've succesfully implemented an MS-paint style paint bucket using the flood fill argorithm. However, near the edges of image elements pixels are left unfilled, because the lines are anti-aliased. This is because the current condition on whether to fill is colourAtCurrentPixel == colourToReplace (the colours are RGB uints) I'd like to add a smoothing/treshold option like in Photoshop and other sophisticated tools, but what's the algorithm to determine the equality/distance between two colours? if (match(pixel(x,y), colourToReplace) setpixel(x,y,colourToReplaceWith) How to fill in match()? Here's my current full code: var b:BitmapData = settings.background; b.lock(); var from:uint = b.getPixel(x,y); var q:Array = []; var xx:int; var yy:int; var w:int = b.width; var h:int = b.height; q.push(y*w + x); while (q.length != 0) { var xy:int = q.shift(); xx = xy % w; yy = (xy - xx) / w; if (b.getPixel(xx,yy) == from) { b.setPixel(xx,yy,to); if (xx != 0) q.push(xy-1); if (xx != w-1) q.push(xy+1); if (yy != 0) q.push(xy-w); if (yy != h-1) q.push(xy+w); } } b.unlock(null);

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  • Has the recent version of subversion dealt with "Access Denied" errors from windows services that mo

    - by Eric LaForce
    Does anyone know if this subversion "bug" has been dealt with? https://svn.apache.org/repos/asf/subversion/tags/1.6.9/www/faq.html#windows-access-denied I'm getting occasional "Access Denied" errors on Windows. They seem to happen at random. Why? These appear to be due to the various Windows services that monitor the filesystem for changes (anti-virus software, indexing services, the COM+ Event Notification Service). This is not really a bug in Subversion, which makes it difficult for us to fix. A summary of the current state of the investigation is available here. A workaround that should reduce the incidence rate for most people was implemented in revision 7598; if you have an earlier version, please update to the latest release. Currently I am experiencing this same behavior in version 1.5.6 when I try and do a SVN switch (I have suspected McAfee as the culprit for a while and when I saw this I feel it validates my suspicions). I read through the link given but it seems pretty old, so I didn't know if this FAQ was just outdated and the issue has actually be resolved. Thanks for any help. Configuration: SVN 1.5.6 TortoiseSVN 1.5.9 Build 15518 Windows XP SP3 32-bit

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