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• CodePlex Daily Summary for Tuesday, December 11, 2012

  CodePlex Daily Summary for Tuesday, December 11, 2012Popular ReleasesDirectX Tool Kit: December 11, 2012: December 11, 2012 Ex versions of DDSTextureLoader and WICTextureLoader Removed use of ATL's CComPtr in favor of WRL's ComPtr for all platforms to support VS Express editions Updated VS 2010 project for official 'property sheet' integration for Windows 8.0 SDK Minor fix to CommonStates for Feature Level 9.1 Tweaked AlphaTestEffect.cpp to work around ARM NEON compiler codegen bug Added dxguid.lib as a default library for Debug builds to resolve GUID link issuesCleverBobCat: CleverBobCat 1.1.3: Fixed: - Cart code now works in vab, wheels retract correctly and no more anchors visible - No more exceptions on VAB Added: - ResourceTransfer beam now has a wide array of configurable options for beam material, size and colors - Added an optional offset to resource transfer, if specificed the "beam" will start from part center + the specified offsetSharpCompress - a fully native C# library for RAR, 7Zip, Zip, Tar, GZip, BZip2: SharpCompress 0.8.2: This release just contains some fixes that have been done since the last release. Plus, this is strong named as well. I apologize for the lack of updates but my free time is less these days.re-linq: 1.13.178.0: This is build 1.13.178.0 of re-linq. Find the complete release notes for the build here: Release NotesMedia Companion: MediaCompanion3.511b release: Two more bug fixes: - General Preferences were not getting restored - Fanart and poster image files were being locked, preventing changes to themVodigi Open Source Interactive Digital Signage: Vodigi Release 5.5: The following enhancements and fixes are included in Vodigi 5.5. Vodigi Administrator - Manage Music Files - Add Music Files to Image Slide Shows - Manage System Messages - Display System Messages to Users During Login - Ported to Visual Studio 2012 and MVC 4 - Added New Vodigi Administrator User Guide Vodigi Player - Improved Login/Schedule Startup Procedure - Startup Using Last Known Schedule when Disconnected on Startup - Improved Check for Schedule Changes - Now Every 15 Minutes - Pla...Secretary Tool: Secretary Tool v1.1.0: I'm still considering this version a beta version because, while it seems to work well for me, I haven't received any feedback and I certainly don't want anyone relying solely on this tool for calculations and such until its correct functioning is verified by someone. This version includes several bug fixes, including a rather major one with Emergency Contact Information not saving. Also, reporting is completed. There may be some tweaking to the reporting engine, but it is good enough to rel...VidCoder: 1.4.10 Beta: Added progress percent to the title bar/task bar icon. Added MPLS information to Blu-ray titles. Fixed the following display issues in Windows 8: Uncentered text in textbox controls Disabled controls not having gray text making them hard to identify as disabled Drop-down menus having hard-to distinguish white on light-blue text Added more logging to proxy disconnect issues and increased timeout on initial call to help prevent timeouts. Fixed encoding window showing the built-in pre...WPF Application Framework (WAF): WPF Application Framework (WAF) 2.5.0.400: Version 2.5.0.400 (Release): This release contains the source code of the WPF Application Framework (WAF) and the sample applications. Requirements .NET Framework 4.0 (The package contains a solution file for Visual Studio 2010) The unit test projects require Visual Studio 2010 Professional Changelog Legend: [B] Breaking change; [O] Marked member as obsolete Update the documentation. InfoMan: Write the documentation. Other Downloads Downloads OverviewHome Access Plus+: v8.5: v8.5.1211.1240 Fixed: changed to using the thumbnailPhoto attribute instead of jpegPhoto v8.5.1208.1500 This is a point release, for the other parts of HAP+ see the v8.3 release. Fixed: #me#me issue with the Edit Profile Link Updated: 8.5.1208 release Updated: Documentation with hidden booking system feature Added: Room Drop Down to the Booking System (no control panel interface), can be Resource Specific Fixed: Recursive AD Group Membership Lookup Fixed: User.IsInRole with recursive lookup...Http Explorer: httpExplorer-1.1: httpExplorer now has the ability to connect to http server via web proxies. The proxy may be explicitly specified by hostname or IP address. Or it may be specified via the Internet Options settings of Windows. You may also specify credentials to pass to the proxy if the proxy requires them. These credentials may be NTLM or basic authentication (clear text username and password).Bee OPOA Platform: Bee OPOA Demo V1.0.001: Initial version.Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.78: Fix for issue #18924 - using -pretty option left in ///#DEBUG blocks. Fix for issue #18980 - bad += optimization caused bug in resulting code. Optimization has been removed pending further review.Dynamics Crm 2011 Solution Manager: Crm Solution Manager 1.0: First Version.Lava JS: Lava JS 1.0: Sourcemp3player-xslt-plugin: mp3player module 1.0: This is a mp3 player module that you can install on your umbraco project. It can display the list of the media and you can click the button to play or stop.STeaL : stealed functionarities from STL: STeaL 0.4.1(prelerease): + fill / fill-nMi-DevEnv: Development 0.5: Ran a new test scenario where I created a DC, then created a web server, blew it away, then re-created the web server. The purpose of the test was to see how the installers would handle information existing in AD, like the OU for CRM. This revealed yet another silly issue in retrieving details of existing OU's, where I had the syntax wrong. I should read exception details more closely :) Apologies also, I've just now started labelling the solution according to these "snapshots". Sorry for...Yahoo! UI Library: YUI Compressor for .Net: Version 2.2.0.0 - Epee: New : Web Optimization package! Cleaned up the nuget packages BugFix: minifying lots of files will now be faster because of a recent regression in some code. (We were instantiating something far too many times).DtPad - .NET Framework text editor: DtPad 2.9.0.40: http://dtpad.diariotraduttore.com/files/images/flag-eng.png English + A new built-in editor for the management of CSV files, including the edit of cells, deleting and adding new rows, replacement of delimiter character and much more (issue #1137) + The limit of rows allowed before the decommissioning of their side panel has been raised (new default: 1.000) (issue #1155, only partially solved) + Pressing CTRL+TAB now DtPad opens a screen that shows the list of opened tabs (issue #1143) + Note...New ProjectsAmazon S3 Upload with Uploadify: ASP.MVC upload file from client browser direct to Amazon S3Ameoto DEV: Bin for all of our software sources :DAutonomic Computing Library: This framework will simplify the development of Autonomic Computing Systems. BIUUITest: BIUUITestBotvaBot: This project should help tothe Botva.Ru gamers to automize their game proces. It is a set of libraries for simple sending of the HTTP requests with list of the main requests to the botva.ru web-site. Also project contains the clients forsimple using this request umulators.Cartellino: Scopo del progetto è la realizzazione di un software in grado di rilevare i dati dai rilevatori 3Tec (www.3tec.it) e stampare i cartellini presenza dei dipendenticmsforbeginner: in this project explain how to edit, create multiple webpages to a single website with less knowledge on html ,.net languagesContact Us Module: This is an Umbraco based module for feedback. You can upload the contact us module in the dashboard and then display those module anywhere in your site.CrmXpress Security Roles Helper For Microsoft Dynamics CRM 2011: CrmXpress Security Roles Helper is a tool/utility. It lets you compare the Security Roles for their differences at the privilege level with their scopes.DarkSky Helpdesk: DarkSky Helpdesk is an Orchard module that turns your Orchard application into a Helpdesk system.DataEntity: A Framework that help us to make persistences and materializations from any SQLServer DataBase Tables to Entity classes. Better performance with native ADO.NET.Edisfera DNN Training Task Module: This is a training project to familiarize with codeplex and dnn module creation.eyoung events description language: Eyoung is a event driven language. It can be used in many fields, such as intrusion action definition.FastBuild: Fast build VS2010 C++ project with the options OpenCV, QT, Boost and OpenGL.Find Changeset By Comment: This extension is used to find changesets that contain a specific phrase in a comment.Gatepass System: This application under development is my first application on codeplex. It is meant primarily as a learning tool while developing a Gatepass System. This GateHandle Template Library (HTL): Handle Template Library (HTL) is a C++ library for developing Windows applications and services. It provides a set of classes for files, threads, events, and more.iDoklad API: iDoklad API Demo je Open Source projekt spolecnosti Cígler Software. Ukázková aplikace demonstruje napojení na fakturacní službu iDokladIronBefunge: IronBefunge is an interpretor (written in .NET) for Befunge programs.Iterator Tasks: Iterator Tasks is a iterator-based coroutine class library.Javacc-Compile-N14: Javacc - compile - N14 is a students' compiler project and we use javacc to compiler XYZ-2 languageMessenger Game - Starter Kit: Kom godt i gang med at lave spil til Messenger med dette komplette Starter Kit. Indeholder et komplet netværksspil lavet med Messenger Activity API og Silverlight.MOBZcript: MOBZcript is a simple batch file editor for cmd scripts. It saves and runs your scripts as if you started them from a command line.NET.Library: The NET.Library will be available in different versions to run on the .Net 2, 3 and 4 frameworks and consists of various .Net programming utilities. proxificator: Proxificator is component for getting the appropriate proxyRetailManagement: abcStudentManage: testWebQQ Interface: A library that enable programmers to access QQ much easier via codeZytonic Screenshot: Upload Images From your Computer Harddrive or Screen With Ease!

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• Nginx routing script for NodeJS and Wordpress

  - by Nilay Parikh

  We are moving blogs and site from wordpress to nodejs and ready to move into production. However I'm not able to figure it out how to implement routing from front server (Nginx) to NodeJS (prefered web instance) and if data not synced yet into NodeJS website than (404 will throw by NodeJS) fall back to (using reverse proxy) to Wordpress and serve page, during the transformation period. Q1. Is the approach good for the scenario, or anyone can suggest better approach? Q2. Should NodeJS treat itself as Reverse proxy (using bouncy : https://github.com/substack/bouncy or similar package) in event of fall back or shoud stick with Nginx to do so using fastcgi approch. Both NodeJS and Wordpress are on single server only, In first scenario, /if resource available than serve directly User -> Nginx -> NodeJS (8080) \if resource not available then reverse query wordpress and serve content second scenario, /if resource available than serve directly User -> Nginx -> NodeJS (8080) \if resource not available then 404 to Nginx and Nginx script fallback to Wordpress (FastCGI PHP) Later we have plan to phase out Wordpress and PHP from the server environment completely. I'd like to see any examples of Nginx or Varnish scripts and/or NodeJS scripts if you have for me to refer. Thanks.

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• Class hierarchy problem in this social network model

  - by Gerenuk

  I'm trying to design a class system for a social network data model - basically a link/object system. Now I have roughly the following structure (simplified and only relevant methods shown) class Data: "used to handle the data with mongodb" "can link, unlink data and also return other linked data" "is basically a proxy object that only stores _id and accesses mongodb on requests" "it looks like {_id: ..., _out: [id1, id2,...], _inc: [id3, id4, ...]}" def get_node(self, id) "create a new Data object from the underlying mongodb" "each data object can potentially create a reference object to new mongo data" "this is needed when the data returns the linked objects" class Node: """ this class proxies linking calls to .data it includes additional network logic operations whereas Data only contains a basic database solution """ def __init__(self, data): "the infrastructure realization is stored as composition by an included object data" "Node bascially proxies most calls to the infrastructure object data" def get_node(self, data): "creates a new object of class Object or Link depending on data" class Object(Node): "can have multiple connections to Link" class Link(Node): "has one 'in' and one 'out' connection to an Object" This system is working, however maybe wouldn't work outside Python. Note that after reading links Now I have two questions here: 1) I want to infrastructure of the data storage to be replacable. Earlier I had Data as a superclass of Node so that it provided the neccessary calls. But (without dirty Python tricks) you cannot replace the superclass dynamically. Is using composition therefore recommended? The drawback is that I have to proxy most calls (link, unlink etc). Any thoughts? 2) The class Node contains the common method .get_node which is used to built new Object or Link instances after reading out the data. Some attribute of data decided whether the object which is only stored by id should be instantiated as an Object or Link class. The problem here is that Node needs to know about Object and Link in advance, which seems dodgy. Do you see a different solution? Both Object and Link need to instantiate one of all possible types depending on what the find in their linked data. Are there any other ideas how to implement a flexible Object/Link structure where the underlying database storage is isolated?

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• Problems installing Ubuntu server and desktop

  - by Rufus

  google translate Good afternoon I'm new to linux, I have to install a proxy and to them I decided on Ubuntu, the problem is that it took several days trying to install Ubuntu on any version and when installing i get error [Errno 5] input / output error says that is because the disc (cd or dvd) is bad or faulty change it and save all denuevo but I get the same error try changing the hard drive to see if my drive had no problem and I also get the same error , the machine where I want to mount the Ubuntu is a P4 with 1GB rAM and 40GB disk is more than the minimum requirements for even so I get the error ... I would like someone could help me thank you very much ..... original Problemas al instalar Ubuntu server y desktop Buenas tardes soy nuevo en linux, tengo que instalar un proxy y para ellos me decidi por Ubuntu, el problema es que llevo varios dias tratando de instalar Ubuntu en cualquiera de sus versiones y al momento de instalar me sale error [Errno 5] input/output error dice que se debe a que el disco (cd o dvd) esta malo o defectuoso lo cambie y grabe todo denuevo pero me sale el mismo error trate de cambiar el disco duro para ver si no tenia problema mi disco y tambien me sale el mismo error, la maquina donde quiero montar el Ubuntu es un p4 con 1gb ram y disco de 40gb, es mas de los requerimientos minimos por aun asi me sale el error... me gustaria que alguien me pudiera ayudar muchas gracias.....

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• Ubuntu 13.04 client cannot connect to Raspbian samba share

  - by envoyweb

  I have a client Ubuntu 13.04 machine trying to connect to a server running Raspbian with samba and samba-common-bin installed on the server I can see my share and when I try to login I get this error: Unable to access location: Failed to write windows share Cannot allocate memory. I have installed ntfs-3g for the usb hard drive that already auto mounts on the server so I never had to create a directory or edit fstab. Testparm on the server states the following: [global] workgroup = ENVOYWEB server string = %h server map to guest = Bad User obey pam restrictions = Yes pam password change = Yes passwd program = /usr/bin/passwd %u passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* . unix password sync = Yes syslog = 0 log file = /var/log/samba/log.%m max log size = 1000 dns proxy = No usershare allow guests = Yes panic action = /usr/share/samba/panic-action %d idmap config * : backend = tdb [homes] comment = Home Directories valid users = %S create mask = 0700 directory mask = 0700 browseable = No [printers] comment = All Printers path = /var/spool/samba create mask = 0700 printable = Yes print ok = Yes browseable = No [print$] comment = Printer Drivers path = /var/lib/samba/printers [BigDude] comment = Sharing BigDude's Files path = /media/BigDude/ valid users = @users read only = No create mask = 0755 testparm on the client which is running ubuntu is as follows [global] workgroup = ENVOYWEB server string = %h server (Samba, Ubuntu) map to guest = Bad User obey pam restrictions = Yes pam password change = Yes passwd program = /usr/bin/passwd %u passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* . unix password sync = Yes syslog = 0 log file = /var/log/samba/log.%m max log size = 1000 dns proxy = No usershare allow guests = Yes panic action = /usr/share/samba/panic-action %d idmap config * : backend = tdb [printers] comment = All Printers path = /var/spool/samba create mask = 0700 printable = Yes print ok = Yes browseable = No [print$] comment = Printer Drivers path = /var/lib/samba/printers

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• USB device changes using udev and D-Bus

  - by kicsyromy

  I am trying to get a list of currently plugged in USB devices in Ubuntu 10.10 and monitor changes that happen, like devices being plugged in or out using udev and D-Bus. I'm fairly new to programming using D-Bus. I saw one example: "Linux: How to detect is usb keyboard is plugged and unplugged". Problem is that it uses HAL and I know that HAL is deprecated. I found some working code, but it's working only with storage devices such as USB sticks, media players or CD-ROM drives. I want the whole thing: mice, keyboards, USB cameras, chargers; anything that is plugged in to the USB. How can I listen D-Bus events for any USB device plug and unplug? This is basically what I have now (also): import dbus import gobject from dbus.mainloop.glib import DBusGMainLoop def device_added_callback(device): print 'Device %s was added' % (device) def device_changed_callback(device): print 'Device %s was changed' % (device) #must be done before connecting to DBus DBusGMainLoop(set_as_default=True) bus = dbus.SystemBus() proxy = bus.get_object("org.freedesktop.UDisks", "/org/freedesktop/UDisks") iface = dbus.Interface(proxy, "org.freedesktop.UDisks.Device") devices = iface.get_dbus_method('EnumerateDevices')() print '%s' % (devices) #addes two signal listeners iface.connect_to_signal('DeviceAdded', device_added_callback) iface.connect_to_signal('DeviceChanged', device_changed_callback) #start the main loop mainloop = gobject.MainLoop() mainloop.run()

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• What are the hard and fast rules for Cache Control?

  - by Metalshark

  Confession: sites I maintain have different rules for Cache Control mostly based on the default configuration of the server followed up with recommendations from the Page Speed & Y-Slow Firefox plug-ins and the Network Resources view in Google's Speed Tracer. Cache-Control is set to private/public depending on what they say to do, ETag's/Last-Modified headers are only tinkered with if Y-Slow suggests there is something wrong and Vary-Accept-Encoding seems necessary when manually gziping files for Amazon CloudFront. When reading through the material on the different options and what they do there seems to be conflicting information, rules for broken proxies and cargo cult configurations. Any of the official information provided by the analysis tools mentioned above is quite inaccessible as it deals with each topic individually instead of as a unified strategy (so there is no cross-referencing of techniques). For example, it seems to make no sense that the speed analysis tools rate a site with ETag's the same as a site without them if they are meant to help with caching. What are the hard and fast rules for a platform agnostic Cache Control strategy? EDIT: A link through Jeff Atwood's article explains Caching in superb depth. For the record though here are the hard and fast rules: If the file is Compressed using GZIP, etc - use "cache-control: private" as a proxy may return the compressed version to a client that does not support it (the browser cache will hold files marked this way though). Also remember to include a "Vary: Accept-Encoding" to say that it is compressible. Use Last-Modified in conjunction with ETag - belt and braces usage provides both validators, whilst ETag is based on file contents instead of modification time alone, using both covers all bases. NOTE: AOL's PageTest has a carte blanche approach against ETags for some reason. If you are using Apache on more than one server to host the same content then remove the implicitly declared inode from ETags by excluding it from the FileETag directive (i.e. "FileETag MTime Size") unless you are genuinely using the same live filesystem. Use "cache-control: public" wherever you can - this means that proxy servers (and the browser cache) will return your content even if the rest of the page needs HTTP authentication, etc.

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• Directory Synchronization

  - by Robert May

  We’re using federated security with Office 365 and everything was running swimmingly and then I started getting the following error when trying to synchronize security information: “An unknown error occurred with the Microsoft Online Services Sign-in Assistant. Contact Technical Support.” Great.  Very descriptive.  In the event viewer, you get a bit more detail: GetAuthState() failed with -2147186688 state. HResult:0. Contact Technical Support.  (0x80048831) If you do some searching, you’ll find that there are a couple of MSDN articles about this error.  In KB2502710 you’re told to reinstall sign in assistant.  This one requires a reboot.  In KB2517393 you’re told to make sure that your proxy settings are working correctly.  I’m not using a proxy and everything was set up right. Rather frustrating and I couldn’t figure out what was going on.  What finally keyed me in was the error number being presented.  Rather than 80048800, which is listed in the second article, I was getting 80048831.  I did a quick search and found something that was seemingly unrelated here.  Could it really be so simple as the password having expired for my synchronization user? Turns out, it was that simple.  Once the password was reset and reentered, everything worked great again. Since this isn’t a user that humans use, I also don’t want the password to expire.  You can find the instructions for that (use Set-MsolUser –UserPrincipalName <user ID> –PasswordNeverExpires $true) here. Technorati Tags: Office 365

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• Allowing client to select data to return via REST interface

  - by CMP

  I have a rest service that is essentially a proxy to a variety of other services. So if I call GET /users/{id} It will get their user profile, as well as order history, and contact info, etc... all from various services, and aggregates them into one nice object. My problem is that each call to a different service has the potential to add time to the original request, so we would rather not get ALL the data ALL of the time if a particular client does not care about all of the pieces. A solution I have arrived at is to do something like this: GET /users/{id}?includeOrders=true&includeX=true&includeY=true... That works, and it allow me to do only what I need to, but it is cumbersome. We have added enough different data sources that there are too many parameters for that style to be useful. I could do something similar with a single integer and a bitmask or something, but that only makes it harder to read, and it does not feel very Restful. I could break it down into multiple calls so they would need to call /users/{id}/orders and /users/{id}/profile separately, but that sort of defeats the purpose of an aggregating proxy, who's purpose is to make clients jobs easier. Are there any good patterns that can help me return just enough data for each client, without making it too difficult for them to filter and select what they want?

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• Fusion Middleware 11gR1 : 3??????

  - by Hiroyuki Yoshino

  2011?3? (2011/03/08 ??)?Fusion Middleware 11gR1 ?????????????? ?????????????3??????? 1. Oracle iPlanet Web Proxy Server Oracle iPlanet Web Proxy Server???????4.0.14????4.0.15????????? ???????Release Notes (??) ?????????? ?????????????????????? Platforms: AIX, HP-UX Itanium, HP-UX PA-RISC, Linux x86, Linux x86-64, Microsoft Windows (32-bit), Microsoft Windows x64, Solaris (SPARC), Other Platforms 2. Oracle Security Governer Integration Kit ???????????? Oracle Security Governor??Healthcare??????????????????????????????????????????????????????????? ?????????????????????? Platforms: AIX, HP-UX Itanium, HP-UX PA-RISC, Linux x86, Linux x86-64, Microsoft Windows (32-bit), Microsoft Windows x64, Solaris (SPARC) 3. Oracle Tuxedo Oracle Tuxedo????????????????? Oracle Tuxedo System and Application Monitor (TSAM)????(11.1.1.2.0??11.1.1.2.1)????? Oracle Tuxedo JCA Adapter????(11.1.1.2.0??11.1.1.2.1)????? Oracle Service Architecture Leveraging Tuxedo (SALT)????(11.1.1.1.0??11.1.1.2.0)????? ???????????Oracle Tuxedo Application Runtime for CICS and Batch???Oracle Tuxedo Application Rehosting Workbench? ???????????????? CICS????????????????Oracle Tuxedo???????·??????????????·?????????????????COBOL????????????????JCL??????·????????????????????????????????????CICS?????????????????????????????????? ??????????? (??)?????????? ???Oracle Tuxedo?????????????????????????? Platforms: AIX, HP-UX Itanium, Linux x86, Linux x86-64, Microsoft Windows (32-bit), Microsoft Windows x64, Solaris (SPARC), Other Platforms ???????????????

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• Yahoo is sending our server's transactional email to the Spam folder, even though we have set up SPF and DKIM

  - by Derrick Miller

  Yahoo Mail is sending our server's transactional emails to the Spam folder, even though we have taken quite a few anti-spam steps. By contrast, Gmail allows the messages through to the inbox just fine. Here are the things which are in place: SPF is set up for the domain holsteinplaza.com. Yahoo reports spf=pass in the message headers. DKIM is set up for the domain holsteinplaza.com. Yahoo reports dkim=pass in the message headers. We have a proper reverse DNS entry for the sending mail server. Name - IP matches IP - Name. Neither Domainkeys nor SenderID are set up. From what I can tell, DKIM is the way of the future, and there is not much to be gained from adding Domainkeys or SenderID. Following are the headers. Any ideas what more I should do to get Yahoo to stop flagging the emails as spam? From Holstein Plaza Auctions Sat Jun 25 18:30:08 2011 X-Apparently-To: [email protected] via 98.138.90.132; Sat, 25 Jun 2011 18:30:11 -0700 Return-Path: <[email protected]> X-YahooFilteredBulk: 70.32.113.42 Received-SPF: pass (domain of holsteinplaza.com designates 70.32.113.42 as permitted sender) X-YMailISG: i_vaA_QWLDuLOmXhDjUv3aBKJl5Un6EiP6Yk2m4yn3jeEuYK MkhpqIt9zDUbHARCwXrhl9pqjTANurGVca7gytSs.mryWVQcbWBx.DaItWRb VcyrIzwMzXKCSeu06H2a.cJ7HG5vJLJaKmHUUI_1ttXKn_Aegiu5yHvFX83R Lpth0witO9zfaKvOMaJV3LAxpIpFOydwvq1cqjZ8nURxQbxM3Cl.QW7MxxrC 09qLVn_D_xSdU94QdU22IsVmlaRHv.uU5dnIazu.KSkhKpYykDoZA2SH0SY4 JmTZj3LP8N926xXVDzYQ5K6QvKuJL5g0d9pYZx3KC59sgIu5oHlJ3Q15RdKb f3OJw0PR6oIyJ2yStVr8vfbDgOfj3qig03.Tw6g6MMNpv1G7Cuol4oJeUaYP xELxX6dHgBgCSuWMcbsrxbK4BIXcS2qhpMqYQ4Isk.XXyA8uvmFXyvgc1ds5 8jo0rW.Wsw.55Z.KTPaQ0gHXj0T3OGppYMELSJv1iuhPyyAnZpmq01CU0Qd5 CcRgdyW3HaqhmpXqJCS0Clo16zXA4HmAjR0tgIQrHRLc3D9N02AOzvmDgCb1 vCh0p00QeKVq8UNkcShPRxZFKi9khtkLhPBlXEKkhJ76zyDmHUxTY.dQHVVD 8D2hx7BxbqI9DINI8x5oR5Q8hYkZqHYQsmGNkaU77O2BnsEv5WxMEmzrBJ4Z h8zGCidgYPiZycZfnfaBp0Xb4tya2WMTN45W02JFcO1qq_UMJ9xPeqZhPEj. j9YvBAC8324GGF.c8eWcNB2VB34QHgTcVUl3.c0XUCuncls9Cyg4L7AoIdCi HvAklSzDDu9nW6732VEipV9FJ_JkDupDNQU2hfiPG.3OeF8GwTnVYnEn0EiZ aO0NCnZhXuLDcN3K7ml3846yRdASvzPFs9s4aJkzR0FkhVvptiMBEOdRkKdG wHWmvWpK4GTZpW4yU7CnKpW2MiWWn1MP0h_CCZFKs5.3mfmfPjPVIABN_RuU Q8ex5hdKnKlQiqK56LzcPRnYmNtrwdsUX9CYn9d6cPpXR_Bi5jrNJMNzdFvq lGO0CBT4QPe2V45U8PtpMitttuDA1cCvmyBPFswxNlL0jyX0a_W.vl0YW5.d HhDItpHhDxKRUscM28IR.exetq4QCzyM X-Originating-IP: [70.32.113.42] Authentication-Results: mta1267.mail.ac4.yahoo.com from=holsteinplaza.com; domainkeys=neutral (no sig); from=holsteinplaza.com; dkim=pass (ok) Received: from 127.0.0.1 (EHLO predator.axis80.com) (70.32.113.42) by mta1267.mail.ac4.yahoo.com with SMTP; Sat, 25 Jun 2011 18:30:11 -0700 Received: (qmail 1440 invoked by uid 48); 25 Jun 2011 21:30:09 -0400 To: [email protected] Subject: this is a test X-PHPMAILER-DKIM: phpmailer.worxware.com DKIM-Signature: v=1; a=rsa-sha1; q=dns/txt; l=203; s=auction; t=1309051808; c=relaxed/simple; h=From:To:Subject; d=holsteinplaza.com; [email protected]; z=From:=20Holstein=20Plaza=20Auctions=20<[email protected]> |To:[email protected] |Subject:=20this=20is=20a=20test; bh=B3Tw5AQb1va627KEoazuFEBZ0fg=; b=oQ5uFq+oekPTGhszyIritjuuIAi3qPNyeitu+aWMhdx3oC6O2j5hJsDFpK0sS5fms7QdnBkBcEzT0iekEvn9EfAdCkGZ2KrtEC0yv7QKQcrjXxy07GJpj9nq0LYbgOuPdw8mGvKxlRZ+jFBX0DRJm0xXFLkr+MEaILw7adHTCCM= Date: Sat, 25 Jun 2011 21:30:08 -0400 From: Holstein Plaza Auctions <[email protected]> Reply-to: Holstein Plaza Auctions <[email protected]> Message-ID: <[email protected]> X-Priority: 3 X-Mailer: PHPMailer 5.1 (phpmailer.sourceforge.net) MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="iso-8859-1" Content-Length: 195

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• centos6.3 varnish3.03 get the wrong backend

  - by Sola.Shawn

  I install varnish3.03 with yum! I got a problem with it my varnish config bellow:** # #backend weibo { .host = "192.168.1.178"; .port = "8080"; .connect_timeout=20s; .first_byte_timeout=20s; .between_bytes_timeout=20s; } #backend smth { .host = "192.168.1.115"; .port = "8080"; .connect_timeout=20s; .first_byte_timeout=20s; .between_bytes_timeout=20s; } #sub vcl_recv { if (req.restarts == 0) { if (req.http.x-forwarded-for) { set req.http.X-Forwarded-For = req.http.X-Forwarded-For + ", " + client.ip; } else { set req.http.X-Forwarded-For = client.ip; } } if (req.request != "GET" && req.request != "HEAD" && req.request != "PUT" && req.request != "POST" && req.request != "TRACE" && req.request != "OPTIONS" && req.request != "DELETE") { # /* Non-RFC2616 or CONNECT which is weird. */ return(pipe); } if (req.request != "GET" && req.request != "HEAD") { # /* We only deal with GET and HEAD by default */ return(pass); } if (req.http.Authorization || req.http.Cookie) { /* Not cacheable by default */ return(pass); } if (req.http.host ~ "^(hk.)?weibo.com"){ set req.http.host = "hk.weibo.com"; set req.backend = weibo; } elseif (req.http.host ~ "^(www.)?newsmth.net"){ set req.http.host = "www.newsmth.net"; set req.backend = smth; } else { error 404 "Unknown virtual host"; } return(lookup); } ##sub vcl_pipe { return(pipe); } #sub vcl_pass { return(pass); } #sub vcl_hash { hash_data(req.url); if(req.http.host) { hash_data(req.http.host); } else { hash_data(server.ip); } return(hash); } #sub vcl_hit { if(req.http.Cache-Control~"no-cache"||req.http.Cache-Control~"max-age=0"||req.http.Pragma~"no-cache"){ set obj.ttl=0s; return (restart); } return(deliver); } #sub vcl_miss { return(fetch); } #sub vcl_fetch { if (beresp.ttl <= 120s || beresp.http.Set-Cookie || beresp.http.Vary == "*") { /* * Mark as "Hit-For-Pass" for the next 2 minutes */ set beresp.ttl = 10s; return (hit_for_pass); } return(deliver); } #sub vcl_deliver { return(deliver); } #sub vcl_init { return(ok); } #sub vcl_fini { return(ok); } and my Win7's hosts file add bellow: 192.168.1.178 www.newsmth.net 192.168.1.178 hk.weibo.com start varnish varnishd -f /etc/varnish/dd.vcl -s malloc,100M -a 0.0.0.0:8000 -T 0.0.0.0:3500<br> but when I access the "hk.weibo.com:8000" it fine, and got: Hello,I am hk.weibo.com! but when access http://www.newsmth.net:8000/, got: Hello,I am hk.weibo.com! <br> My question is why it isn't "Hello,I am www.newsmth.net!"? varnish fetched the content from the wrong backend. Does anyone know how to fix this?

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• duplicate cache pages: Varnish

  - by Sukhjinder Singh

  Recently we have configured Varnish on our server, it was successfully setup but we noticed that if we open any page in multiple browsers, the Varnish send request to Apache not matter page is cached or not. If we refresh twice on each browser it creates duplicate copies of the same page. What exactly should happen: If any page is cached by Varnish, the subsequent request should be served from Varnish itself when we are opening the same page in browser OR we are opening that page from different IP address. Following is my default.vcl file backend default { .host = "127.0.0.1"; .port = "80"; } sub vcl_recv { if( req.url ~ "^/search/.*$") { }else { set req.url = regsub(req.url, "\?.*", ""); } if (req.restarts == 0) { if (req.http.x-forwarded-for) { set req.http.X-Forwarded-For = req.http.X-Forwarded-For + ", " + client.ip; } else { set req.http.X-Forwarded-For = client.ip; } } if (!req.backend.healthy) { unset req.http.Cookie; } set req.grace = 6h; if (req.url ~ "^/status\.php$" || req.url ~ "^/update\.php$" || req.url ~ "^/admin$" || req.url ~ "^/admin/.*$" || req.url ~ "^/flag/.*$" || req.url ~ "^.*/ajax/.*$" || req.url ~ "^.*/ahah/.*$") { return (pass); } if (req.url ~ "(?i)\.(pdf|asc|dat|txt|doc|xls|ppt|tgz|csv|png|gif|jpeg|jpg|ico|swf|css|js)(\?.*)?$") { unset req.http.Cookie; } if (req.http.Cookie) { set req.http.Cookie = ";" + req.http.Cookie; set req.http.Cookie = regsuball(req.http.Cookie, "; +", ";"); set req.http.Cookie = regsuball(req.http.Cookie, ";(SESS[a-z0-9]+|SSESS[a-z0-9]+|NO_CACHE)=", "; \1="); set req.http.Cookie = regsuball(req.http.Cookie, ";[^ ][^;]*", ""); set req.http.Cookie = regsuball(req.http.Cookie, "^[; ]+|[; ]+$", ""); if (req.http.Cookie == "") { unset req.http.Cookie; } else { return (pass); } } if (req.request != "GET" && req.request != "HEAD" && req.request != "PUT" && req.request != "POST" && req.request != "TRACE" && req.request != "OPTIONS" && req.request != "DELETE") {return(pipe);} /* Non-RFC2616 or CONNECT which is weird. */ if (req.request != "GET" && req.request != "HEAD") { return (pass); } if (req.http.Accept-Encoding) { if (req.url ~ "\.(jpg|png|gif|gz|tgz|bz2|tbz|mp3|ogg)$") { # No point in compressing these remove req.http.Accept-Encoding; } else if (req.http.Accept-Encoding ~ "gzip") { set req.http.Accept-Encoding = "gzip"; } else if (req.http.Accept-Encoding ~ "deflate") { set req.http.Accept-Encoding = "deflate"; } else { # unknown algorithm remove req.http.Accept-Encoding; } } return (lookup); } sub vcl_deliver { if (obj.hits > 0) { set resp.http.X-Varnish-Cache = "HIT"; } else { set resp.http.X-Varnish-Cache = "MISS"; } } sub vcl_fetch { if (beresp.status == 404 || beresp.status == 301 || beresp.status == 500) { set beresp.ttl = 10m; } if (req.url ~ "(?i)\.(pdf|asc|dat|txt|doc|xls|ppt|tgz|csv|png|gif|jpeg|jpg|ico|swf|css|js)(\?.*)?$") { unset beresp.http.set-cookie; } set beresp.grace = 6h; } sub vcl_hash { hash_data(req.url); if (req.http.host) { hash_data(req.http.host); } else { hash_data(server.ip); } return (hash); } sub vcl_pipe { set req.http.connection = "close"; } sub vcl_hit { if (req.request == "PURGE") {ban_url(req.url); error 200 "Purged";} if (!obj.ttl > 0s) {return(pass);} } sub vcl_miss { if (req.request == "PURGE") {error 200 "Not in cache";} }

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• SQLAuthority News – SQLPASS Nov 8-11, 2010-Seattle – An Alternative Look at Experience

  - by pinaldave

  I recently attended most prestigious SQL Server event SQLPASS between Nov 8-11, 2010 at Seattle. I have only one expression for the event - Best Summit Ever This year the summit was at its best. Instead of writing about my usual routine or the event, I am going to write about the interesting things I did and how I felt about it! Best Summit Ever Trip to Seattle! This was my second trip to Seattle this year and the journey is always long. Here is the travel stats on how long it takes to get to Seattle: 24 hours official air time 36 hours total travel time (connection waits and airport commute) Every time I travel to USA I gain a day and when I travel back to home, I lose a day. However, the total traveling time is around 3 days. The journey is long and very exhausting. However, it is all worth it when you’re attending an event like SQLPASS. Here are few things I carry when I travel for a long journey: Dry Snack packs – I like to have some good Indian Dry Snacks along with me in my backpack so I can have my own snack when I want Amazon Kindle – Loaded with 80+ books A physical book – This is usually a very easy to read book I do not watch movies on the plane and usually spend my time reading something quick and easy. If I can go to sleep, I go for it. I prefer to not to spend time in conversation with the guy sitting next to me because usually I end up listening to their biography, which I cannot blog about. Sheraton Seattle SQLPASS In any case, I love to go to Seattle as the city is great and has everything a brilliant metropolis has to offer. The new Light Train is extremely convenient, and I can take it directly from the airport to the city center. My hotel, the Sheraton, was only few meters (in the USA people count in blocks – 3 blocks) away from the train station. This time I saved USD 40 each round trip due to the Light Train. Sessions I attended! Well, I really wanted to attend most of the sessions but there was great dilemma of which ones to choose. There were many, many sessions to be attended and at any given time there was more than one good session being presented. I had decided to attend sessions in area performance tuning and I attended quite a few sessions this year, compared to what I was able to do last year. Here are few names of the speakers whose sessions I attended (please note, following great speakers are not listed in any order. I loved them and I enjoyed their sessions): Conor Cunningham Rushabh Mehta Buck Woody Brent Ozar Jonathan Kehayias Chris Leonard Bob Ward Grant Fritchey I had great fun attending their sessions. The sessions were meaningful and enlightening. It is hard to rate any session but I have found that the insights learned in Conor Cunningham’s sessions are the highlight of the PASS Summit. Rushabh Mehta at Keynote SQLPASS   Bucky Woody and Brent Ozar I always like the sessions where the speaker is much closer to the audience and has real world experience. I think speakers who have worked in the real world deliver the best content and most useful information. Sessions I did not like! Indeed there were few sessions I did not like it and I am not going to name them here. However, there were strong reasons I did not like their sessions, and here is why: Sessions were all theory and had no real world connections. All technical questions ended with confusing answers (lots of “I will get back to you on it,” “it depends,” “let us take this offline” and many more…) “I am God” kind of attitude in the speakers For example, I attended a session of one very well known speaker who is a specialist for one particular area. I was bit late for the session and was surprised to see that in a room that could hold 350 people there were only 30 attendees. After sitting there for 15 minutes, I realized why lots of people left. Very soon I found I preferred to stare out the window instead of listening to that particular speaker. One on One Talk! Many times people ask me what I really like about PASS. I always say the experience of meeting SQL legends and spending time with them one on one and LEARNING! Here is the quick list of the people I met during this event and spent more than 30 minutes with each of them talking about various subjects: Pinal Dave and Brad Shulz Pinal Dave and Rushabh Mehta Michael Coles and Pinal Dave Rushabh Mehta – It is always pleasure to meet with him. He is a man with lots of energy and a passion for community. He recently told me that he really wanted to turn PASS into resource for learning for every SQL Server Developer and Administrator in the world. I had great in-depth discussion regarding how a single person can contribute to a community. Michael Coles – I consider him my best friend. It is always fun to meet him. He is funny and very knowledgeable. I think there are very few people who are as expert as he is in encryption and spatial databases. Worth meeting him every single time. Glenn Berry – A real friend of everybody. He is very a simple person and very true to his heart. I think there is not a single person in whole community who does not like him. He is a friends of all and everybody likes him very much. I once again had time to sit with him and learn so much from him. As he is known as Dr. DMV, I can be his nurse in the area of DMV. Brad Schulz – I always wanted to meet him but never got chance until today. I had great time meeting him in person and we have spent considerable amount of time together discussing various T-SQL tricks and tips. I do not know where he comes up with all the different ideas but I enjoy reading his blog and sharing his wisdom with me. Jonathan Kehayias – He is drill sergeant in US army. If you get the impression that he is a giant with very strong personality – you are wrong. He is very kind and soft spoken DBA with strong performance tuning skills. I asked him how he has kept his two jobs separate and I got very good answer – just work hard and have passion for what you do. I attended his sessions and his presentation style is very unique.  I feel like he is speaking in a language I understand. Louis Davidson – I had never had a chance to sit with him and talk about technology before. He has so much wisdom and he is very kind. During the dinner, I had talked with him for long time and without hesitation he started to draw a schema for me on the menu. It was a wonderful experience to learn from a master at the dinner table. He explained to me the real and practical differences between third normal form and forth normal form. Honestly I did not know earlier, but now I do. Erland Sommarskog – This man needs no introduction, he is very well known and very clear in conveying his ideas. I learned a lot from him during the course of year. Every time I meet him, I learn something new and this time was no exception. Joe Webb – Joey is all about community and people, we had interesting conversation about community, MVP and how one can be helpful to community without losing passion for long time. It is always pleasant to talk to him and of course, I had fun time. Ross Mistry – I call him my brother many times because he indeed looks like my cousin. He provided me lots of insight of how one can write book and how he keeps his books simple to appeal to all the readers. A wonderful person and great friend. Ola Hallgren - I did not know he was coming to the summit. I had great time meeting him and had a wonderful conversation with him regarding his scripts and future community activities. Blythe Morrow – She used to be integrated part of SQL Server Community and PASS HQ. It was wonderful to meet her again and re-connect. She is wonderful person and I had a great time talking to her. Solid Quality Mentors – It is difficult to decide who to mention here. Instead of writing all the names, I am going to include a photo of our meeting. I had great fun meeting various members of our global branches. This year I was sitting with my Spanish speaking friends and had great fun as Javier Loria from Solid Quality translated lots of things for me. Party, Party and Parties Every evening there were various parties. I did attend almost all of them. Every party had different theme but the goal of all the parties the same – networking. Here are the few parties where I had lots of fun: Dell Reception Party Exhibitor Party Solid Quality Fun Party Red Gate Friends Party MVP Dinner Microsoft Party MVP Dinner Quest Party Gameworks PASS Party Volunteer Party at Garage Solid Quality Mentors (10 Members out of 120) They were all great networking opportunities and lots of fun. I really had great time meeting people at the various parties. There were few people everywhere – well, I will say I am among them – who hopped parties. NDA – Not Decided Agenda During the event there were few meetings marked “NDA.” Someone asked me “why are these things NDA?”  My response was simple: because they are not sure themselves. NDA stands for Not Decided Agenda. Toys, Giveaways and Luggage I admit, I was like child in Gameworks and was playing to win soft toys. I was doing it for my daughter. I must thank all of the people who gave me their cards to try my luck. I won 4 soft-toys for my daughter and it was fun. Also, thanks to Angel who did a final toy swap with me to get the desired toy for my daughter. I also collected ducks from Idera, as my daughter really loves them. Solid Quality Booth Each of the exhibitors was giving away something and I got so much stuff that my luggage got quite a bit bigger when I returned. Best Exhibitor Idera had SQLDoctor (a real magician and fun guy) to promote their new tool SQLDoctor. I really had a great time participating in the magic myself. At one point, the magician made my watch disappear.  I have seen better magic before, but this time it caught me unexpectedly and I was taken by surprise. I won many ducks again. The Common Question I heard the following common questions: I have seen you somewhere – who are you? – I am Pinal Dave. I did not know that Pinal is your first name and Dave is your last name, how do you pronounce your last name again? – Da-way How old are you? – I am as old as I can be. Are you an Indian because you look like one? – I did not answer this one. Where are you from? This question was usually asked after looking at my badge which says India. So did you really fly from India? – Yes, because I have seasickness so I do not prefer the sea journey. How long was the journey? – 24/36/12 (air travel time/total travel time/time zone difference) Why do you write on SQLAuthority.com? – Because I want to. I remember your daughter looks like you. – Is this even a question? Of course, she is daddy’s little girl. There were so many other questions, I will have to write another blog post about it. SQLPASS Again, Best Summit Ever! Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: About Me, Pinal Dave, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQLAuthority Author Visit, T SQL, Technology Tagged: SQLPASS

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• A Communication System for XAML Applications

  - by psheriff

  In any application, you want to keep the coupling between any two or more objects as loose as possible. Coupling happens when one class contains a property that is used in another class, or uses another class in one of its methods. If you have this situation, then this is called strong or tight coupling. One popular design pattern to help with keeping objects loosely coupled is called the Mediator design pattern. The basics of this pattern are very simple; avoid one object directly talking to another object, and instead use another class to mediate between the two. As with most of my blog posts, the purpose is to introduce you to a simple approach to using a message broker, not all of the fine details. IPDSAMessageBroker Interface As with most implementations of a design pattern, you typically start with an interface or an abstract base class. In this particular instance, an Interface will work just fine. The interface for our Message Broker class just contains a single method “SendMessage” and one event “MessageReceived”. public delegate void MessageReceivedEventHandler( object sender, PDSAMessageBrokerEventArgs e); public interface IPDSAMessageBroker{  void SendMessage(PDSAMessageBrokerMessage msg);   event MessageReceivedEventHandler MessageReceived;} PDSAMessageBrokerMessage Class As you can see in the interface, the SendMessage method requires a type of PDSAMessageBrokerMessage to be passed to it. This class simply has a MessageName which is a ‘string’ type and a MessageBody property which is of the type ‘object’ so you can pass whatever you want in the body. You might pass a string in the body, or a complete Customer object. The MessageName property will help the receiver of the message know what is in the MessageBody property. public class PDSAMessageBrokerMessage{  public PDSAMessageBrokerMessage()  {  }   public PDSAMessageBrokerMessage(string name, object body)  {    MessageName = name;    MessageBody = body;  }   public string MessageName { get; set; }   public object MessageBody { get; set; }} PDSAMessageBrokerEventArgs Class As our message broker class will be raising an event that others can respond to, it is a good idea to create your own event argument class. This class will inherit from the System.EventArgs class and add a couple of additional properties. The properties are the MessageName and Message. The MessageName property is simply a string value. The Message property is a type of a PDSAMessageBrokerMessage class. public class PDSAMessageBrokerEventArgs : EventArgs{  public PDSAMessageBrokerEventArgs()  {  }   public PDSAMessageBrokerEventArgs(string name,     PDSAMessageBrokerMessage msg)  {    MessageName = name;    Message = msg;  }   public string MessageName { get; set; }   public PDSAMessageBrokerMessage Message { get; set; }} PDSAMessageBroker Class Now that you have an interface class and a class to pass a message through an event, it is time to create your actual PDSAMessageBroker class. This class implements the SendMessage method and will also create the event handler for the delegate created in your Interface. public class PDSAMessageBroker : IPDSAMessageBroker{  public void SendMessage(PDSAMessageBrokerMessage msg)  {    PDSAMessageBrokerEventArgs args;     args = new PDSAMessageBrokerEventArgs(      msg.MessageName, msg);     RaiseMessageReceived(args);  }   public event MessageReceivedEventHandler MessageReceived;   protected void RaiseMessageReceived(    PDSAMessageBrokerEventArgs e)  {    if (null != MessageReceived)      MessageReceived(this, e);  }} The SendMessage method will take a PDSAMessageBrokerMessage object as an argument. It then creates an instance of a PDSAMessageBrokerEventArgs class, passing to the constructor two items: the MessageName from the PDSAMessageBrokerMessage object and also the object itself. It may seem a little redundant to pass in the message name when that same message name is part of the message, but it does make consuming the event and checking for the message name a little cleaner – as you will see in the next section. Create a Global Message Broker In your WPF application, create an instance of this message broker class in the App class located in the App.xaml file. Create a public property in the App class and create a new instance of that class in the OnStartUp event procedure as shown in the following code: public partial class App : Application{  public PDSAMessageBroker MessageBroker { get; set; }   protected override void OnStartup(StartupEventArgs e)  {    base.OnStartup(e);     MessageBroker = new PDSAMessageBroker();  }} Sending and Receiving Messages Let’s assume you have a user control that you load into a control on your main window and you want to send a message from that user control to the main window. You might have the main window display a message box, or put a string into a status bar as shown in Figure 1. Figure 1: The main window can receive and send messages The first thing you do in the main window is to hook up an event procedure to the MessageReceived event of the global message broker. This is done in the constructor of the main window: public MainWindow(){  InitializeComponent();   (Application.Current as App).MessageBroker.     MessageReceived += new MessageReceivedEventHandler(       MessageBroker_MessageReceived);} One piece of code you might not be familiar with is accessing a property defined in the App class of your XAML application. Within the App.Xaml file is a class named App that inherits from the Application object. You access the global instance of this App class by using Application.Current. You cast Application.Current to ‘App’ prior to accessing any of the public properties or methods you defined in the App class. Thus, the code (Application.Current as App).MessageBroker, allows you to get at the MessageBroker property defined in the App class. In the MessageReceived event procedure in the main window (shown below) you can now check to see if the MessageName property of the PDSAMessageBrokerEventArgs is equal to “StatusBar” and if it is, then display the message body into the status bar text block control. void MessageBroker_MessageReceived(object sender,   PDSAMessageBrokerEventArgs e){  switch (e.MessageName)  {    case "StatusBar":      tbStatus.Text = e.Message.MessageBody.ToString();      break;  }} In the Page 1 user control’s Loaded event procedure you will send the message “StatusBar” through the global message broker to any listener using the following code: private void UserControl_Loaded(object sender,  RoutedEventArgs e){  // Send Status Message  (Application.Current as App).MessageBroker.    SendMessage(new PDSAMessageBrokerMessage("StatusBar",      "This is Page 1"));} Since the main window is listening for the message ‘StatusBar’, it will display the value “This is Page 1” in the status bar at the bottom of the main window. Sending a Message to a User Control The previous example sent a message from the user control to the main window. You can also send messages from the main window to any listener as well. Remember that the global message broker is really just a broadcaster to anyone who has hooked into the MessageReceived event. In the constructor of the user control named ucPage1 you can hook into the global message broker’s MessageReceived event. You can then listen for any messages that are sent to this control by using a similar switch-case structure like that in the main window. public ucPage1(){  InitializeComponent();   // Hook to the Global Message Broker  (Application.Current as App).MessageBroker.    MessageReceived += new MessageReceivedEventHandler(      MessageBroker_MessageReceived);} void MessageBroker_MessageReceived(object sender,  PDSAMessageBrokerEventArgs e){  // Look for messages intended for Page 1  switch (e.MessageName)  {    case "ForPage1":      MessageBox.Show(e.Message.MessageBody.ToString());      break;  }} Once the ucPage1 user control has been loaded into the main window you can then send a message using the following code: private void btnSendToPage1_Click(object sender,  RoutedEventArgs e){  PDSAMessageBrokerMessage arg =     new PDSAMessageBrokerMessage();   arg.MessageName = "ForPage1";  arg.MessageBody = "Message For Page 1";   // Send a message to Page 1  (Application.Current as App).MessageBroker.SendMessage(arg);} Since the MessageName matches what is in the ucPage1 MessageReceived event procedure, ucPage1 can do anything in response to that event. It is important to note that when the message gets sent it is sent to all MessageReceived event procedures, not just the one that is looking for a message called “ForPage1”. If the user control ucPage1 is not loaded and this message is broadcast, but no other code is listening for it, then it is simply ignored. Remove Event Handler In each class where you add an event handler to the MessageReceived event you need to make sure to remove those event handlers when you are done. Failure to do so can cause a strong reference to the class and thus not allow that object to be garbage collected. In each of your user control’s make sure in the Unloaded event to remove the event handler. private void UserControl_Unloaded(object sender, RoutedEventArgs e){  if (_MessageBroker != null)    _MessageBroker.MessageReceived -=         _MessageBroker_MessageReceived;} Problems with Message Brokering As with most “global” classes or classes that hook up events to other classes, garbage collection is something you need to consider. Just the simple act of hooking up an event procedure to a global event handler creates a reference between your user control and the message broker in the App class. This means that even when your user control is removed from your UI, the class will still be in memory because of the reference to the message broker. This can cause messages to still being handled even though the UI is not being displayed. It is up to you to make sure you remove those event handlers as discussed in the previous section. If you don’t, then the garbage collector cannot release those objects. Instead of using events to send messages from one object to another you might consider registering your objects with a central message broker. This message broker now becomes a collection class into which you pass an object and what messages that object wishes to receive. You do end up with the same problem however. You have to un-register your objects; otherwise they still stay in memory. To alleviate this problem you can look into using the WeakReference class as a method to store your objects so they can be garbage collected if need be. Discussing Weak References is beyond the scope of this post, but you can look this up on the web. Summary In this blog post you learned how to create a simple message broker system that will allow you to send messages from one object to another without having to reference objects directly. This does reduce the coupling between objects in your application. You do need to remember to get rid of any event handlers prior to your objects going out of scope or you run the risk of having memory leaks and events being called even though you can no longer access the object that is responding to that event. NOTE: You can download the sample code for this article by visiting my website at http://www.pdsa.com/downloads. Select “Tips & Tricks”, then select “A Communication System for XAML Applications” from the drop down list.

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• Gmail rejects emails. Openspf.net fails the tests

  - by pablomedok

  I've got a problem with Gmail. It started after one of our trojan infected PCs sent spam for one day from our IP address. We've fixed the problem, but we got into 3 black lists. We've fixed that, too. But still every time we send an email to Gmail the message is rejected: So I've checked Google Bulk Sender's guide once again and found an error in our SPF record and fixed it. Google says everything should become fine after some time, but this doesn't happen. 3 weeks already passed but we still can't send emails to Gmail. Our MX setup is a bit complex, but not too much: We have a domain name delo-company.com, it has it's own mail @delo-company.com (this one is fine, but the problems are with sub-domain name corp.delo-company.com). Delo-company.com domain has several DNS records for the subdomain: corp A 82.209.198.147 corp MX 20 corp.delo-company.com corp.delo-company.com TXT "v=spf1 ip4:82.209.198.147 ~all" (I set ~all for testing purposes only, it was -all before that) These records are for our corporate Exchange 2003 server at 82.209.198.147. Its LAN name is s2.corp.delo-company.com so its HELO/EHLO greetings are also s2.corp.delo-company.com. To pass EHLO check we've also created some records in delo-company.com's DNS: s2.corp A 82.209.198.147 s2.corp.delo-company.com TXT "v=spf1 ip4:82.209.198.147 ~all" As I understand SPF verifications should be passed in this way: Out server s2 connects to MX of the recepient (Rcp.MX): EHLO s2.corp.delo-company.com Rcp.MX says Ok, and makes SPF check of HELO/EHLO. It does NSlookup for s2.corp.delo-company.com and gets the above DNS-records. TXT records says that s2.corp.delo-company.com should be only from IP 82.209.198.147. So it should be passed. Then our s2 server says RCPT FROM: Rcp.MX` server checks it, too. The values are the same so they should also be positive. Maybe there is also a rDNS check, but I'm not sure what is checked HELO or RCPT FROM. Our PTR record for 82.209.198.147 is: 147.198.209.82.in-addr.arpa. 86400 IN PTR s2.corp.delo-company.com. To me everything looks fine, but anyway all emails are rejected by Gmail. So, I've checked MXtoolbox.com - it says everything is fine, I passed http://www.kitterman.com/spf/validate.html Python check, I did 25port.com email test. It's fine, too: Return-Path: <[email protected]> Received: from s2.corp.delo-company.com (82.209.198.147) by verifier.port25.com id ha45na11u9cs for <[email protected]>; Fri, 2 Mar 2012 13:03:21 -0500 (envelope-from <[email protected]>) Authentication-Results: verifier.port25.com; spf=pass [email protected] Authentication-Results: verifier.port25.com; domainkeys=neutral (message not signed) [email protected] Authentication-Results: verifier.port25.com; dkim=neutral (message not signed) Authentication-Results: verifier.port25.com; sender-id=pass [email protected] Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01CCF89E.BE02A069" Subject: test Date: Fri, 2 Mar 2012 21:03:15 +0300 X-MimeOLE: Produced By Microsoft Exchange V6.5 Message-ID: <[email protected]> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: test Thread-Index: Acz4jS34oznvbyFQR4S5rXsNQFvTdg== From: =?koi8-r?B?89XQ0tXOwMsg8MHXxcw=?= <[email protected]> To: <[email protected]> I also checked with [email protected], but it FAILs all the time, no matter which SPF records I make: <s2.corp.delo-company.com #5.7.1 smtp;550 5.7.1 <[email protected]>: Recipient address rejected: SPF Tests: Mail-From Result="softfail": Mail From="[email protected]" HELO name="s2.corp.delo-company.com" HELO Result="softfail" Remote IP="82.209.198.147"> I've filled Gmail form twice, but nothing happens. We do not send spam, only emails for our clients. 2 or 3 times we did mass emails (like New Year Greetings and sales promos) from corp.delo-company.com addresses, but they where all complying to Gmail Bulk Sender's Guide (I mean SPF, Open Relays, Precedence: Bulk and Unsubscribe tags). So, this should be not a problem. Please, help me. What am I doing wrong? UPD: I also tried Unlocktheinbox.com test and the server also fails this test. Here is the result: http://bit.ly/wYr39h . Here is one more http://bit.ly/ypWLjr I also tried to send email from that server manually via telnet and everything is fine. Here is what I type: 220 mx.google.com ESMTP g15si4811326anb.170 HELO s2.corp.delo-company.com 250 mx.google.com at your service MAIL FROM: <[email protected]> 250 2.1.0 OK g15si4811326anb.170 RCPT TO: <[email protected]> 250 2.1.5 OK g15si4811326anb.170 DATA 354 Go ahead g15si4811326anb.170 From: [email protected] To: Pavel <[email protected]> Subject: Test 28 This is telnet test . 250 2.0.0 OK 1330795021 g15si4811326anb.170 QUIT 221 2.0.0 closing connection g15si4811326anb.170 And this is what I get: Delivered-To: [email protected] Received: by 10.227.132.73 with SMTP id a9csp96864wbt; Sat, 3 Mar 2012 09:17:02 -0800 (PST) Received: by 10.101.128.12 with SMTP id f12mr4837125ann.49.1330795021572; Sat, 03 Mar 2012 09:17:01 -0800 (PST) Return-Path: <[email protected]> Received: from s2.corp.delo-company.com (s2.corp.delo-company.com. [82.209.198.147]) by mx.google.com with SMTP id g15si4811326anb.170.2012.03.03.09.15.59; Sat, 03 Mar 2012 09:17:00 -0800 (PST) Received-SPF: pass (google.com: domain of [email protected] designates 82.209.198.147 as permitted sender) client-ip=82.209.198.147; Authentication-Results: mx.google.com; spf=pass (google.com: domain of [email protected] designates 82.209.198.147 as permitted sender) [email protected] Date: Sat, 03 Mar 2012 09:17:00 -0800 (PST) Message-Id: <[email protected]> From: [email protected] To: Pavel <[email protected]> Subject: Test 28 This is telnet test

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• Optimize php-fpm and varnish for a powerfull server

  - by Jim

  My setup is: Intel® Core™ i7-2600 and RAM 16 GB DDR3 RAM varnish+nginx+php-fpm+apc for a not very heavy WordPress blog with W3 Total Cache and CDN My problem is that after 55 hits per second according to blitz.io varnish starts giving out timeouts. CPU usage at this time is hardly 1%. Free memory at all time remains 10GB+. I tried benchmarking php-fpm directly with result of 150hits/s without any timeouts. But after that the CPU usage goes 100% and it stops responding. Can you help me optimize it to handle more? As i understand nginx has nothing to do over here so i dont put its config. php-fpm config listen = /tmp/php5-fpm.sock listen.allowed_clients = 127.0.0.1 user = nginx group = nginx pm = dynamic pm.max_children = 150 pm.start_servers = 7 pm.min_spare_servers = 2 pm.max_spare_servers = 15 pm.max_requests = 500 slowlog = /var/log/php-fpm/www-slow.log php_admin_value[error_log] = /var/log/php-fpm/www-error.log php_admin_flag[log_errors] = on apc extension = apc.so apc.enabled=1 apc.shm_size=512MB apc.num_files_hint=0 apc.user_entries_hint=0 apc.ttl=7200 apc.use_request_time=1 apc.user_ttl=7200 apc.gc_ttl=3600 apc.cache_by_default=1 apc.filters apc.mmap_file_mask=/tmp/apc.XXXXXX apc.file_update_protection=2 apc.enable_cli=0 apc.max_file_size=1M apc.stat=1 apc.stat_ctime=0 apc.canonicalize=0 apc.write_lock=1 apc.report_autofilter=0 apc.rfc1867=0 apc.rfc1867_prefix =upload_ apc.rfc1867_name=APC_UPLOAD_PROGRESS apc.rfc1867_freq=0 apc.rfc1867_ttl=3600 apc.include_once_override=0 apc.lazy_classes=0 apc.lazy_functions=0 apc.coredump_unmap=0 apc.file_md5=0 apc.preload_path Varnish VCL backend default { .host = "127.0.0.1"; .port = "8080"; .connect_timeout = 6s; .first_byte_timeout = 6s; .between_bytes_timeout = 60s; } acl purgehosts { "localhost"; "127.0.0.1"; } # Called after a document has been successfully retrieved from the backend. sub vcl_fetch { # Uncomment to make the default cache "time to live" is 5 minutes, handy # but it may cache stale pages unless purged. (TODO) # By default Varnish will use the headers sent to it by Apache (the backend server) # to figure out the correct TTL. # WP Super Cache sends a TTL of 3 seconds, set in wp-content/cache/.htaccess set beresp.ttl = 24h; # Strip cookies for static files and set a long cache expiry time. if (req.url ~ "\.(jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|pdf|txt|tar|wav|bmp|rtf|js|flv|swf|html|htm)$") { unset beresp.http.set-cookie; set beresp.ttl = 24h; } # If WordPress cookies found then page is not cacheable if (req.http.Cookie ~"(wp-postpass|wordpress_logged_in|comment_author_)") { # set beresp.cacheable = false;#versions less than 3 #beresp.ttl>0 is cacheable so 0 will not be cached set beresp.ttl = 0s; } else { #set beresp.cacheable = true; set beresp.ttl=24h;#cache for 24hrs } # Varnish determined the object was not cacheable #if ttl is not > 0 seconds then it is cachebale if (!beresp.ttl > 0s) { # set beresp.http.X-Cacheable = "NO:Not Cacheable"; } else if ( req.http.Cookie ~"(wp-postpass|wordpress_logged_in|comment_author_)" ) { # You don't wish to cache content for logged in users set beresp.http.X-Cacheable = "NO:Got Session"; return(hit_for_pass); #previously just pass but changed in v3+ } else if ( beresp.http.Cache-Control ~ "private") { # You are respecting the Cache-Control=private header from the backend set beresp.http.X-Cacheable = "NO:Cache-Control=private"; return(hit_for_pass); } else if ( beresp.ttl < 1s ) { # You are extending the lifetime of the object artificially set beresp.ttl = 300s; set beresp.grace = 300s; set beresp.http.X-Cacheable = "YES:Forced"; } else { # Varnish determined the object was cacheable set beresp.http.X-Cacheable = "YES"; if (beresp.status == 404 || beresp.status >= 500) { set beresp.ttl = 0s; } # Deliver the content return(deliver); } sub vcl_hash { # Each cached page has to be identified by a key that unlocks it. # Add the browser cookie only if a WordPress cookie found. if ( req.http.Cookie ~"(wp-postpass|wordpress_logged_in|comment_author_)" ) { #set req.hash += req.http.Cookie; hash_data(req.http.Cookie); } } # vcl_recv is called whenever a request is received sub vcl_recv { # remove ?ver=xxxxx strings from urls so css and js files are cached. # Watch out when upgrading WordPress, need to restart Varnish or flush cache. set req.url = regsub(req.url, "\?ver=.*$", ""); # Remove "replytocom" from requests to make caching better. set req.url = regsub(req.url, "\?replytocom=.*$", ""); remove req.http.X-Forwarded-For; set req.http.X-Forwarded-For = client.ip; # Exclude this site because it breaks if cached if ( req.http.host == "sr.ituts.gr" ) { return( pass ); } # Serve objects up to 2 minutes past their expiry if the backend is slow to respond. set req.grace = 120s; # Strip cookies for static files: if (req.url ~ "\.(jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|pdf|txt|tar|wav|bmp|rtf|js|flv|swf|html|htm)$") { unset req.http.Cookie; return(lookup); } # Remove has_js and Google Analytics __* cookies. set req.http.Cookie = regsuball(req.http.Cookie, "(^|;\s*)(__[a-z]+|has_js)=[^;]*", ""); # Remove a ";" prefix, if present. set req.http.Cookie = regsub(req.http.Cookie, "^;\s*", ""); # Remove empty cookies. if (req.http.Cookie ~ "^\s*$") { unset req.http.Cookie; } if (req.request == "PURGE") { if (!client.ip ~ purgehosts) { error 405 "Not allowed."; } #previous version ban() was purge() ban("req.url ~ " + req.url + " && req.http.host == " + req.http.host); error 200 "Purged."; } # Pass anything other than GET and HEAD directly. if (req.request != "GET" && req.request != "HEAD") { return( pass ); } /* We only deal with GET and HEAD by default */ # remove cookies for comments cookie to make caching better. set req.http.cookie = regsub(req.http.cookie, "1231111111111111122222222333333=[^;]+(; )?", ""); # never cache the admin pages, or the server-status page, or your feed? you may want to..i don't if (req.request == "GET" && (req.url ~ "(wp-admin|bb-admin|server-status|feed)")) { return(pipe); } # don't cache authenticated sessions if (req.http.Cookie && req.http.Cookie ~ "(wordpress_|PHPSESSID)") { return(lookup); } # don't cache ajax requests if(req.http.X-Requested-With == "XMLHttpRequest" || req.url ~ "nocache" || req.url ~ "(control.php|wp-comments-post.php|wp-login.php|bb-login.php|bb-reset-password.php|register.php)") { return (pass); } return( lookup ); } Varnish Daemon options DAEMON_OPTS="-a :80 \ -T 127.0.0.1:6082 \ -f /etc/varnish/ituts.vcl \ -u varnish -g varnish \ -S /etc/varnish/secret \ -p thread_pool_add_delay=2 \ -p thread_pools=8 \ -p thread_pool_min=100 \ -p thread_pool_max=1000 \ -p session_linger=50 \ -p session_max=150000 \ -p sess_workspace=262144 \ -s malloc,5G" Im not sure where to start, should i for start optimize php-fpm and then go to varnish or php-fpm is at its max right now so i should start looking for the problem in varnish?

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• MySQL 5.5 brings in new ways to authenticate users

  - by Georgi Kodinov

  Ever wanted to use your server's OS for authenticating MySQL users ? Or the corporate LDAP repository ? Unfortunately options like the above are plentiful nowadays. And providing hard-coded support for protocol X or service Y is not the best possible idea. MySQL 5.5 has taken the step into the right direction by providing an infrastructure allowing one to make the server understand different authentication protocols by creating a set of simple plugins (one for the client and one for the server). So now you can easily extend MySQL to search for and authenticate users in your favorite user directory. In fact the API supplied is so versatile that we took the possibility to re-design the current "native" authentication mechanism into a built-in always-on plugin ! OK, let me give you an example: Imagine we have a bunch of users defined in your OS, e.g. we have a user joro with his respective password. And we have a MySQL instance running on the same computer. It would not be unexpected to need to let joro access and/or modify MySQL data. The first step is to define him as a MySQL user. And there's a problem right there : MySQL's CREATE USER joro@localhost IDENTIFIED BY 'joros_password' statement needs a password. And this is a password in no way related to the password that joro have set up in the OS. What's worse : if joro changes his OS password this will in no way be reflected in MySQL. So he'll need to change his MySQL password in a separate step. Not very convenient, specially when you have a lot of users. This is a laborious setup for joro's DBA as well : he'll have to disable his access in both MySQL and the OS should he decides that joro's out of the "nice" list. Now mysql 5.5 to the rescue: Imagine that the smart DBA has created a MySQL server plugin that will check if the name of the user logging in is a valid and enabled OS name and if the password supplied to the mysql client matches the OS and has called this plugin 'auth_os'. Now all that's left to do is to define joro as a MySQL user that will be authenticated externally. This is done by the following command : CREATE USER 'joro'@'localhost' IDENTIFIED WITH 'auth_os'; Now joro can login to MySQL using his current OS password. Note : joro is still a valid MySQL user, so you can grant privileges to him just like you would for all other users. What's better: you can have users that authenticate using different mechanisms in the same server. So you can e.g. safely experiment with external authentication for selected users while keeping your current user base operational. What happens under the hood when joro logs in ? The server will find out by the user definition that it needs to use a non-default authentication and will ask the client to "switch" to using the appropriate client-side plugin (if of course the client is not already using it). If the client can't do this (e.g. because it's an old client or doesn't have the necessary plugin available) the server will reject the login. Otherwise the server will let the server-side plugin decide (while possibly talking to the client side plugin and the OS user directory) if this is a valid login or not. If it is the login process will continue as usual, while if it's not the login will get rejected. There's a lot more that MySQL 5.5 can do for you than just the simple case above. Stay tuned for more advanced use cases like mapping groups of external users to a single MySQL user (so you won't have to have 1-to-1 mapping between your external user directory and your mysql user repository) or ways to control the process as a DBA. Or you can simply skip ahead and read the relevant topics from MySQL's excellent online documentation. Or take a look at the example plugins in plugin/auth. Or take a look at the test suite in mysql-test/t/plugin_auth.test. Changelog entry: http://dev.mysql.com/doc/refman/5.5/en/news-5-5-7.html Primary new sections: Pluggable authentication Proxy users Client plugin C API functions Revised sections: New PROXY privilege New proxies_priv grant table Passwords might be external New external_user and proxy_user system variables New --default-auth and --plugin-dir mysql options New MYSQL_DEFAULT_AUTH and MYSQL_PLUGIN_DIR options for mysql_options() CREATE USER has IDENTIFIED WITH clause to specify auth plugin GRANT has PROXY privilege, IDENTIFIED WITH clause to specify auth plugin The data structure for writing client plugins

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• Convert a DVD Movie Directly to AVI with FairUse Wizard 2.9

  - by DigitalGeekery

  Are you looking for a way to backup your DVD movie collection to AVI?  Today we’ll show you how to rip a DVD movie directly to AVI with FairUse Wizard. About FairUse Wizard FairUse Wizard 2.9 uses the DivX, Xvid, or h.264 codec to convert DVD to an AVI file. It comes in both a free version and commercial version. The free, or “Light” version, can create files up 700MB while the commercial version can output a 1400MB file. This will allow you to back up your movies to CD, or even multiple movies on a single DVD. FairUse Wizard states that it does not work on copy protected discs, but we’ve seen it work on all but some of the most recent copy protection. For this tutorial we’re using the free Light Edition to convert a DVD to AVI. They also offer a commercial version that you can get for $29.99 and it offers even more encoding possibilities for converting video to you portable digital devices. Installation and Configuration Download and install FairUse Wizard. (Download link below). Once the install is complete, open FairUse Wizard by going to Start > All Programs >  FairUse Wizard 2 >  FairUse Wizard 2.   FairUse Wizard will open on the new project screen. Select “Create a new project” and type a project name into the text box. This will be used as the file output name.  Ex: A project name of Simpsons Movie will give you an output file of Simpsons Movie.avi.   Next, browse for a destination folder for the output file and temp files. Note that you will need a minimum of 6 GB of free disk space for the conversion process. Note: Much of that 6 GB will be used for temporary files that we will delete after the conversion process.   Click on the Options button at the bottom.   Under Preferences, choose your preferred video codec and file output size. XviD and x264 are installed by default. If you prefer to use DivX, you will have to install it separately. Also note the “Two pass” option. Checking the “Two pass” box will encode your video twice for higher quality, but will take more time. Un-checking the box will speed up the conversion process.   Under Audio track, note that English subtitles are enabled by default, so to remove the subtitles, you will need to change the dropdown list so it shows only a dash (-). You can also select “Use TV Mode” if your primary playback will be on a 4:3 TV screen. Click “Next.” Full Auto Mode vs. Manual Mode You should now be back to the initial screen. Next, we’ll need to determine whether or not we can use “Full Auto Mode” to convert the movie. The difference is that “Full Auto Mode” will automatically perform a few steps that you will otherwise have to do manually. If you choose the “Full Auto Mode” option, FairUse Wizard will look for the video on the DVD with the longest duration and assume it is the chain that it should convert to AVI. It’s possible, however, your disc may contain a few chains of similar size, such as a theatrical cut and director’s cut, and the longest chain may not be the one you wish to convert. Make sure that “Full auto mode” is not checked yet, and click “Next.”   FairUse Wizard will parse the IFO files and display all video chains longer than 60  seconds. In most cases, you will only find that the largest chain is the one closely matching the duration of the movie. In these instances, you can use “Full Auto Mode.” If you find more than one chain that are close in duration to the length of the movie, consult the literature on the DVD case, or search online, to find the actual running time of the movie. If the proper file chain is not the longest chain, you won’t be able to use “Full Auto Mode.”   Full Auto Mode To use “Full Auto Mode,” simply click the “Back” button to return to the initial screen Now, place a check in the “Full auto mode” check box. Click “Next.” You will then be prompted to chose your DVD drive, then click “OK.” FairUse Wizard will parse the IFO files… … and then prompt you to Select your drive that contains the DVD one more time before beginning the conversion process. Click “OK.”   Manual Mode If you cannot (or don’t wish to) use Full Auto Mode, choose the appropriate video chain and click “Next.” FairUse Wizard will first go through the process of indexing the video. Note: If you get a runtime error during this portion of the process, it likely means that FairUse Wizard cannot handle the copy protection, and thus cannot convert the DVD. FairUse Wizard will automatically detect a cropping region. If necessary, you can edit the cropping region by adjusting the cropping region settings to the left. Click “Next.” Next, click “Auto Detect” to choose the proper field combination. Click “OK” on the pop up window that displays your Field Mode. Then click “Next.” This next screen is mainly comprised of settings from the Options screen. You can make changes at this point such as codec or output size. Click “Next” when ready.   Video Conversion Now the video conversion process will begin. This may take a few hours depending on your system’s hardware. Note: There is a check box to “Shutdown computer when done” if you choose to run the conversion overnight or before leaving for work. The first phase will be video encoding… Then the audio… If you chose the “Two Pass” option, your video video will be encoded again on 2nd pass. Then you’re finished. Unfortunately, FairUse Wizard doesn’t clean up after itself very well. After the process is complete, you’ll want to browse to your output directory and delete all the temporary files as they take up a considerable amount of hard drive space. Now you’re ready to enjoy your movie. Conclusion FairUse Wizard is a nice way to backup your DVD movies to good quality .avi files. You can store them on your hard drive, watch them on a media PC, or burn them to disc. Many DVD players even allow for playback of DivX or XviD encoded video from a CD or DVD. For those of you with children, you can burn that AVI file to CD for your kids, and keep your original DVDs stored safely out of harms way. Download Download FairUse Wizard 2.9 LE Similar Articles Productive Geek Tips Kantaris is a Unique Media Player Based on VLCHow to Make/Edit a movie with Windows Movie Maker in Windows VistaAutomatically Mount and View ISO files in Windows 7 Media CenterTune Your ClearType Font Settings in Windows VistaAdd Images and Metadata to Windows 7 Media Center Movie Library TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 PCmover Professional Make your Joomla & Drupal Sites Mobile with OSMOBI Integrate Twitter and Delicious and Make Life Easier Design Your Web Pages Using the Golden Ratio Worldwide Growth of the Internet How to Find Your Mac Address Use My TextTools to Edit and Organize Text

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• Advanced donut caching: using dynamically loaded controls

  - by DigiMortal

  Yesterday I solved one caching problem with local community portal. I enabled output cache on SharePoint Server 2007 to make site faster. Although caching works fine I needed to do some additional work because there are some controls that show different content to different users. In this example I will show you how to use “donut caching” with user controls – powerful way to drive some content around cache. About donut caching Donut caching means that although you are caching your content you have some holes in it so you can still affect the output that goes to user. By example you can cache front page on your site and still show welcome message that contains correct user name. To get better idea about donut caching I suggest you to read ScottGu posting Tip/Trick: Implement "Donut Caching" with the ASP.NET 2.0 Output Cache Substitution Feature. Basically donut caching uses ASP.NET substitution control. In output this control is replaced by string you return from static method bound to substitution control. Again, take a look at ScottGu blog posting I referred above. Problem If you look at Scott’s example it is pretty plain and easy by its output. All it does is it writes out current user name as string. Here are examples of my login area for anonymous and authenticated users:    It is clear that outputting mark-up for these views as string is pretty lame to implement in code at string level. Every little change in design will end up with new version of controls library because some parts of design “live” there. Solution: using user controls I worked out easy solution to my problem. I used cache substitution and user controls together. I have three user controls: LogInControl – this is the proxy control that checks which “real” control to load. AnonymousLogInControl – template and logic for anonymous users login area. AuthenticatedLogInControl – template and logic for authenticated users login area. This is the control we render for each user separately because it contains user name and user profile fill percent. Anonymous control is not very interesting because it is only about keeping mark-up in separate file. Interesting parts are LogInControl and AuthenticatedLogInControl. Creating proxy control The first thing was to create control that has substitution area where “real” control is loaded. This proxy control should also be available to decide which control to load. The definition of control is very primitive. <%@ Control EnableViewState="false" Inherits="MyPortal.Profiles.LogInControl" %> <asp:Substitution runat="server" MethodName="ShowLogInBox" /> But code is a little bit tricky. Based on current user instance we decide which login control to load. Then we create page instance and load our control through it. When control is loaded we will call DataBind() method. In this method we evaluate all fields in loaded control (it was best choice as Load and other events will not be fired). Take a look at the code. public static string ShowLogInBox(HttpContext context) {     var user = SPContext.Current.Web.CurrentUser;     string controlName;       if (user != null)         controlName = "AuthenticatedLogInControl.ascx";     else         controlName = "AnonymousLogInControl.ascx";       var path = "~/_controltemplates/" + controlName;     var output = new StringBuilder(10000);       using(var page = new Page())     using(var ctl = page.LoadControl(path))     using(var writer = new StringWriter(output))     using(var htmlWriter = new HtmlTextWriter(writer))     {         ctl.DataBind();         ctl.RenderControl(htmlWriter);     }     return output.ToString(); } When control is bound to data we ask to render it its contents to StringBuilder. Now we have the output of control as string and we can return it from our method. Of course, notice how correct I am with resources disposing. :) The method that returns contents for substitution control is static method that has no connection with control instance because hen page is read from cache there are no instances of controls available. Conclusion As you saw it was not very hard to use donut caching with user controls. Instead of writing mark-up of controls to static method that is bound to substitution control we can still use our user controls.

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• techniques for an AI for a highly cramped turn-based tactics game

  - by Adam M.

  I'm trying to write an AI for a tactics game in the vein of Final Fantasy Tactics or Vandal Hearts. I can't change the game rules in any way, only upgrade the AI. I have experience programming AI for classic board games (basically minimax and its variants), but I think the branching factor is too great for the approach to be reasonable here. I'll describe the game and some current AI flaws that I'd like to fix. I'd like to hear ideas for applicable techniques. I'm a decent enough programmer, so I only need the ideas, not an implementation (though that's always appreciated). I'd rather not expend effort chasing (too many) dead ends, so although speculation and brainstorming are good and probably helpful, I'd prefer to hear from somebody with actual experience solving this kind of problem. For those who know it, the game is the land battle mini-game in Sid Meier's Pirates! (2004) and you can skim/skip the next two paragraphs. For those who don't, here's briefly how it works. The battle is turn-based and takes place on a 16x16 grid. There are three terrain types: clear (no hindrance), forest (hinders movement, ranged attacks, and sight), and rock (impassible, but does not hinder attacks or sight). The map is randomly generated with roughly equal amounts of each type of terrain. Because there are many rock and forest tiles, movement is typically very cramped. This is tactically important. The terrain is not flat; higher terrain gives minor bonuses. The terrain is known to both sides. The player is always the attacker and the AI is always the defender, so it's perfectly valid for the AI to set up a defensive position and just wait. The player wins by killing all defenders or by getting a unit to the city gates (a tile on the other side of the map). There are very few units on each side, usually 4-8. Because of this, it's crucial not to take damage without gaining some advantage from it. Units can take multiple actions per turn. All units on one side move before any units on the other side. Order of execution is important, and interleaving of actions between units is often useful. Units have melee and ranged attacks. Melee attacks vary widely in strength; ranged attacks have the same strength but vary in range. The main challenges I face are these: Lots of useful move combinations start with a "useless" move that gains no immediate advantage, or even loses advantage, in order to set up a powerful flank attack in the future. And, since the player units are stronger and have longer range, the AI pretty much always has to take some losses before they can start to gain kills. The AI must be able to look ahead to distinguish between sacrificial actions that provide a future benefit and those that don't. Because the terrain is so cramped, most of the tactics come down to achieving good positioning with multiple units that work together to defend an area. For instance, two defenders can often dominate a narrow pass by positioning themselves so an enemy unit attempting to pass must expose itself to a flank attack. But one defender in the same pass would be useless, and three units can defend a slightly larger pass. Etc. The AI should be able to figure out where the player must go to reach the city gates and how to best position its few units to cover the approaches, shifting, splitting, or combining them appropriately as the player moves. Because flank attacks are extremely deadly (and engineering flank attacks is key to the player strategy), the AI should be competent at moving its units so that they cover each other's flanks unless the sacrifice of a unit would give a substantial benefit. They should also be able to force flank attacks on players, for instance by threatening a unit from two different directions such that responding to one threat exposes the flank to the other. The AI should attack if possible, but sometimes there are no good ways to approach the player's position. In that case, the AI should be able to recognize this and set up a defensive position of its own. But the AI shouldn't be vulnerable to a trivial exploit where the player repeatedly opens and closes a hole in his defense and shoots at the AI as it approaches and retreats. That is, the AI should ideally be able to recognize that the player is capable of establishing a solid defense of an area, even if the defense is not currently in place. (I suppose if a good unit allocation algorithm existed, as needed for the second bullet point, the AI could run it on the player units to see where they could defend.) Because it's important to choose a good order of action and interleave actions between units, it's not as simple as just finding the best move for each unit in turn. All of these can be accomplished with a minimax search in theory, but the search space is too large, so specialized techniques are needed. I thought about techniques such as influence mapping, but I don't see how to use the technique to great effect. I thought about assigning goals to the units. This can help them work together in some limited way, and the problem of "how do I accomplish this goal?" is easier to solve than "how do I win this battle?", but assigning good goals is a hard problem in itself, because it requires knowing whether the goal is achievable and whether it's a good use of resources. So, does anyone have specific ideas for techniques that can help cleverize this AI? Update: I found a related question on Stackoverflow: http://stackoverflow.com/questions/3133273/ai-for-a-final-fantasy-tactics-like-game The selected answer gives a decent approach to choosing between alternative actions, but it doesn't seem to have much ability to look into the future and discern beneficial sacrifices from wasteful ones. It also focuses on a single unit at a time and it's not clear how it could be extended to support cooperation between units in defending or attacking.

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• ASP.NET MVC 3 Hosting :: MVC 2 Strongly Typed HTML Helper and Enhanced Validation Sample

  - by mbridge

  In lue of the off the official release of ASP.NET MVC 2 RTM, I decided I would put together a quick sample of the enhanced HTML.Helpers and validation controls. I am going to use my sample event site where I will have a form so a user can search for information about a certain events. So when the Search page loads the Search action is fired return my strongly typed model. to the view.    1: [HttpGet]    2: public ViewResult Search(): public ViewResult Search()    3: {    4:     IList<EventsModel> result = _eventsService.GetEventList();    5:     var viewModel = new EventSearchModel    6:                         {    7:                             EventList = new SelectList(result, "EventCode","EventName","Select Event")    8:                         };    9:     return View(viewModel);  10: } Nothing special here, although I did want to show how to load up a strongly typed drop down list because that hung me up for a little bit. So to that, I am going to pass back a SelectList to the view and my HTML helper should no how to load this. So lets take a look at the mark up for the view.    1: <%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master"    2: Inherits="System.Web.Mvc.ViewPage<EventsSample.Models.EventSearchModel>" %>    3:     4: <asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">    5:     Search    6: </asp:Content>    7:     8: <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">    9:   10:     <h2>Search for Events</h2>  11:   12:     <% using (Html.BeginForm("Search","Events")) {%>  13:         <%= Html.ValidationSummary(true) %>  14:          15:         <fieldset>  16:             <legend>Fields</legend>  17:              18:             <div class="editor-label">  19:                 <%= Html.LabelFor(model => model.EventNumber) %>  20:             </div>  21:             <div class="editor-field">  22:                 <%= Html.TextBoxFor(model => model.EventNumber) %>  23:                 <%= Html.ValidationMessageFor(model => model.EventNumber) %>  24:             </div>  25:              26:             <div class="editor-label">  27:                 <%= Html.LabelFor(model => model.GuestLastName) %>  28:             </div>  29:             <div class="editor-field">  30:                 <%= Html.TextBoxFor(model => model.GuestLastName) %>  31:                 <%= Html.ValidationMessageFor(model => model.GuestLastName) %>  32:             </div>  33:              34:             <div class="editor-label">  35:                 <%= Html.LabelFor(model => model.EventName) %>  36:             </div>  37:             <div class="editor-field">  38:                 <%= Html.DropDownListFor(model => model.EventName, Model.EventList,"Select Event") %>  39:                 <%= Html.ValidationMessageFor(model => model.EventName) %>  40:             </div>  41:              42:             <p>  43:                 <input type="submit" value="Save" />  44:             </p>  45:         </fieldset>  46:   47:     <% } %>  48:   49:     <div>  50:         <%= Html.ActionLink("Back to List", "Index") %>  51:     </div>  52:   53: </asp:Content> A nice feature is the scaffolding that MVC has to generate code. I simply right clicked inside my Search() action, inside the EventsController and selected “Add View” and then I selected my strongly typed object that I wanted to pass to the view and also selected that I wanted the content type be “Edit”. With that the aspx page was completely generated, although I did have to go back in and change the textbox for the Event Names to a drop down list of the names to select from. The new feature with MVC 2 are the strongly typed HTML helpers. So now, my textboxes, drop down list, and validation helpers are all strongly typed to my model.  This features gives you the benefits of intellisense and also makes it easier to debug. “The Gu” has a great post about the feature in case you want more details. The DropDownListFor function to generate the drop down list was a little tricky for me. You first need to use a Lanbda expression to pass in the property you want the selected value assigned to in your model, and then you need to pass in the list directly from the model. Validations To validate the form, you can use the strongly type validation HTML helpers which will inspect your model and return errors if the validation fails. The definitions of these rules are set directly on the Model itself so lets take a look.    1: using System.ComponentModel.DataAnnotations;    2: using System.Web.Mvc;    3:     4: namespace EventsSample.Models    5: {    6:     public class EventSearchModel    7:     {    8:         [Required(ErrorMessage = "Please enter the event number.")]    9:         [RegularExpression(@"\w{6}",  10:             ErrorMessage = "The Event Number must be 6 letters and/or numbers.")]  11:         public string EventNumber { get; set; }  12:   13:         [Required(ErrorMessage = "Please enter the guest's last name.")]  14:         [RegularExpression(@"^[A-Za-zÀ-ÖØ-öø-ÿ1-9 '\-\.]{1,22}$",  15:             ErrorMessage = "The gueest's last name must 1 to 20 characters.")]  16:         public string GuestLastName { get; set; }  17:   18:         public string EventName { get; set; }  19:         public SelectList EventList { get; set; }  20:     }  21: } Pretty cool! Okay, the only thing left to do is perform the validation in the POST action.    1: [HttpPost]    2: public ViewResult Search(EventSearchModel eventSearchModel)    3: {    4:     if (ModelState.IsValid) return View("SearchResults");    5:     else    6:     {    7:          IList<EventsModel> result = _eventsService.GetEventList();    8:         eventSearchModel.EventList = new SelectList(result, "EVentCode","EventName");   9:   10:         return View(eventSearchModel);  11:     }  12: }  13:     } If the form entries are valid, here I am simply displaying the SearchResult, but in a real world sample I would also go out get the results first. You get the idea though. In my case, when the form is not valid, I also had to reload my SelectList with the event names before I loaded the page again. Remember this is MVC, no _VieState here :) So that’s it. Now my form is validating the data and when it fails it looks like this.

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• Adventures in Scrum: Lesson 1 &ndash; The failed Sprint

  - by Martin Hinshelwood

  I recently had a conversation with a product owner that wanted to have the Scrum team broken up into smaller units so that less time was wasted on the Scrum Ceremonies! Their complaint was around the need in Scrum to have the entire “Team” (7+-2) involved in the sizing of the work during the “Sprint Planning Meeting”.  The standard flippant answer of all Scrum professionals, “Well that's not Scrum”, does not get you any brownie points in these situations. The response could be “Well we are not doing Scrum then” which in turn leads to “We are doing Scrum…But, we have split the scrum team into units of 2/3 so that they can concentrate on a specific area of work”. While this may work, it is not Scrum and should not be called so… It is just a form of Agile. Don’t get me wrong at this stage, there is nothing wrong with Agile, just don’t call it Scrum. The reason that the Product Owner wants to do this is that, in effect, through a number of miscommunications and failings in our implementation of Scrum, there was NO unit of potentially Shippable software at the end of the first sprint. It does not matter to them that most Scrum teams will fail the first Sprint, even those that are high performing teams. Remember it is the product owners their money! We should NOT break up scrum teams into smaller units for the purpose of having less people tied up in the Scrum Ceremonies. The amount of backlog the Team selects is solely up to the Team… Only the Team can assess what it can accomplish over the upcoming Sprint. - Scrum Guide, Scrum.org The entire team must accept the work and in order to understand what they can accept they must be free to size it as a team. This both encourages common understanding and increases visibility on why team members think a task is of a particular size. This has the benefit of increasing the knowledge of the entire team in the problem domain. A new Team often first realizes that it will either sink or swim as a Team, not individually, in this meeting. The Team realizes that it must rely on itself. As it realizes this, it starts to self-organize to take on the characteristics and behaviour of a real Team. - Scrum Guide, Scrum.org This paragraph goes to the why of having the whole team at the meeting; The goal of Scrum it to produce a unit of potentially shippable software at the end of every Sprint. In order to achieve this we need high performing teams and this is what Scrum as a framework has been optimised to produce. I think that our Product Owner is understandably upset over loosing two weeks work and is losing sight the end goal of Scrum in the failures of the moment. As the man spending the money, I completely understand his perspective and I think that we should not have started Scrum on an internal project, but selected a customer  that is open to the ideas and complications of Scrum. So, what should we have NOT done on our first Scrum project: Should not have had 3 interns as the only on site resource – This lead to bad practices as the experienced guys were not there helping and correcting as they usually would. Should not have had the only experienced guys offsite – With both the experienced technical guys in completely different time zones it was difficult to get time for questions. Helping the guys on site was just plain impossible. Should not have used a part time ScrumMaster – Although the ScrumMaster attended all of the Ceremonies, because they are only in 2 full days of the week it makes it difficult for the team to raise impediments as they go. Should not have used a proxy product owner. – This was probably the worst decision that was made. Mainly because the proxy product owner did not have the same vision as the product owner. While Scrum does not explicitly reject the idea of a Proxy Product Owner, I do not think it works very well in practice. The “single wringable neck” needs to contain both the Money and the Vision as well as attending the required meetings. I will be brining all of these things up at the Sprint Retrospective and we will learn from our mistakes and move on. Do, Inspect then Adapt…   Technorati Tags: Scrum,Sprint Planing,Sprint Retrospective,Scrum.org,Scrum Guide,Scrum Ceremonies,Scrummaster,Product Owner Need Help? Professional Scrum Developer Training SSW has six Professional Scrum Developer Trainers who specialise in training your developers in implementing Scrum with Microsoft's Visual Studio ALM tools.

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• Columnstore Case Study #2: Columnstore faster than SSAS Cube at DevCon Security

  - by aspiringgeek

  Preamble This is the second in a series of posts documenting big wins encountered using columnstore indexes in SQL Server 2012 & 2014.  Many of these can be found in my big deck along with details such as internals, best practices, caveats, etc.  The purpose of sharing the case studies in this context is to provide an easy-to-consume quick-reference alternative. See also Columnstore Case Study #1: MSIT SONAR Aggregations Why Columnstore? As stated previously, If we’re looking for a subset of columns from one or a few rows, given the right indexes, SQL Server can do a superlative job of providing an answer. If we’re asking a question which by design needs to hit lots of rows—DW, reporting, aggregations, grouping, scans, etc., SQL Server has never had a good mechanism—until columnstore. Columnstore indexes were introduced in SQL Server 2012. However, they're still largely unknown. Some adoption blockers existed; yet columnstore was nonetheless a game changer for many apps.  In SQL Server 2014, potential blockers have been largely removed & they're going to profoundly change the way we interact with our data.  The purpose of this series is to share the performance benefits of columnstore & documenting columnstore is a compelling reason to upgrade to SQL Server 2014. The Customer DevCon Security provides home & business security services & has been in business for 135 years. I met DevCon personnel while speaking to the Utah County SQL User Group on 20 February 2012. (Thanks to TJ Belt (b|@tjaybelt) & Ben Miller (b|@DBADuck) for the invitation which serendipitously coincided with the height of ski season.) The App: DevCon Security Reporting: Optimized & Ad Hoc Queries DevCon users interrogate a SQL Server 2012 Analysis Services cube via SSRS. In addition, the SQL Server 2012 relational back end is the target of ad hoc queries; this DW back end is refreshed nightly during a brief maintenance window via conventional table partition switching. SSRS, SSAS, & MDX Conventional relational structures were unable to provide adequate performance for user interaction for the SSRS reports. An SSAS solution was implemented requiring personnel to ramp up technically, including learning enough MDX to satisfy requirements. Ad Hoc Queries Even though the fact table is relatively small—only 22 million rows & 33GB—the table was a typical DW table in terms of its width: 137 columns, any of which could be the target of ad hoc interrogation. As is common in DW reporting scenarios such as this, it is often nearly to optimize for such queries using conventional indexing. DevCon DBAs & developers attended PASS 2012 & were introduced to the marvels of columnstore in a session presented by Klaus Aschenbrenner (b|@Aschenbrenner) The Details Classic vs. columnstore before-&-after metrics are impressive. Scenario   Conventional Structures   Columnstore   Δ SSRS via SSAS 10 - 12 seconds 1 second >10x Ad Hoc 5-7 minutes (300 - 420 seconds) 1 - 2 seconds >100x Here are two charts characterizing this data graphically.  The first is a linear representation of Report Duration (in seconds) for Conventional Structures vs. Columnstore Indexes.  As is so often the case when we chart such significant deltas, the linear scale doesn’t expose some the dramatically improved values corresponding to the columnstore metrics.  Just to make it fair here’s the same data represented logarithmically; yet even here the values corresponding to 1 –2 seconds aren’t visible.  The Wins Performance: Even prior to columnstore implementation, at 10 - 12 seconds canned report performance against the SSAS cube was tolerable. Yet the 1 second performance afterward is clearly better. As significant as that is, imagine the user experience re: ad hoc interrogation. The difference between several minutes vs. one or two seconds is a game changer, literally changing the way users interact with their data—no mental context switching, no wondering when the results will appear, no preoccupation with the spinning mind-numbing hurry-up-&-wait indicators.  As we’ve commonly found elsewhere, columnstore indexes here provided performance improvements of one, two, or more orders of magnitude. Simplified Infrastructure: Because in this case a nonclustered columnstore index on a conventional DW table was faster than an Analysis Services cube, the entire SSAS infrastructure was rendered superfluous & was retired. PASS Rocks: Once again, the value of attending PASS is proven out. The trip to Charlotte combined with eager & enquiring minds let directly to this success story. Find out more about the next PASS Summit here, hosted this year in Seattle on November 4 - 7, 2014. DevCon BI Team Lead Nathan Allan provided this unsolicited feedback: “What we found was pretty awesome. It has been a game changer for us in terms of the flexibility we can offer people that would like to get to the data in different ways.” Summary For DW, reports, & other BI workloads, columnstore often provides significant performance enhancements relative to conventional indexing.  I have documented here, the second in a series of reports on columnstore implementations, results from DevCon Security, a live customer production app for which performance increased by factors of from 10x to 100x for all report queries, including canned queries as well as reducing time for results for ad hoc queries from 5 - 7 minutes to 1 - 2 seconds. As a result of columnstore performance, the customer retired their SSAS infrastructure. I invite you to consider leveraging columnstore in your own environment. Let me know if you have any questions.

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• ASP.NET MVC 3 Hosting :: Error Handling and CustomErrors in ASP.NET MVC 3 Framework

  - by C. Miller

  So, what else is new in MVC 3? MVC 3 now has a GlobalFilterCollection that is automatically populated with a HandleErrorAttribute. This default FilterAttribute brings with it a new way of handling errors in your web applications. In short, you can now handle errors inside of the MVC pipeline. What does that mean? This gives you direct programmatic control over handling your 500 errors in the same way that ASP.NET and CustomErrors give you configurable control of handling your HTTP error codes. How does that work out? Think of it as a routing table specifically for your Exceptions, it's pretty sweet! Global Filters The new Global.asax file now has a RegisterGlobalFilters method that is used to add filters to the new GlobalFilterCollection, statically located at System.Web.Mvc.GlobalFilter.Filters. By default this method adds one filter, the HandleErrorAttribute. public class MvcApplication : System.Web.HttpApplication {     public static void RegisterGlobalFilters(GlobalFilterCollection filters)     {         filters.Add(new HandleErrorAttribute());     } HandleErrorAttributes The HandleErrorAttribute is pretty simple in concept: MVC has already adjusted us to using Filter attributes for our AcceptVerbs and RequiresAuthorization, now we are going to use them for (as the name implies) error handling, and we are going to do so on a (also as the name implies) global scale. The HandleErrorAttribute has properties for ExceptionType, View, and Master. The ExceptionType allows you to specify what exception that attribute should handle. The View allows you to specify which error view (page) you want it to redirect to. Last but not least, the Master allows you to control which master page (or as Razor refers to them, Layout) you want to render with, even if that means overriding the default layout specified in the view itself. public class MvcApplication : System.Web.HttpApplication {     public static void RegisterGlobalFilters(GlobalFilterCollection filters)     {         filters.Add(new HandleErrorAttribute         {             ExceptionType = typeof(DbException),             // DbError.cshtml is a view in the Shared folder.             View = "DbError",             Order = 2         });         filters.Add(new HandleErrorAttribute());     }Error Views All of your views still work like they did in the previous version of MVC (except of course that they can now use the Razor engine). However, a view that is used to render an error can not have a specified model! This is because they already have a model, and that is System.Web.Mvc.HandleErrorInfo @model System.Web.Mvc.HandleErrorInfo           @{     ViewBag.Title = "DbError"; } <h2>A Database Error Has Occurred</h2> @if (Model != null) {     <p>@Model.Exception.GetType().Name<br />     thrown in @Model.ControllerName @Model.ActionName</p> }Errors Outside of the MVC Pipeline The HandleErrorAttribute will only handle errors that happen inside of the MVC pipeline, better known as 500 errors. Errors outside of the MVC pipeline are still handled the way they have always been with ASP.NET. You turn on custom errors, specify error codes and paths to error pages, etc. It is important to remember that these will happen for anything and everything outside of what the HandleErrorAttribute handles. Also, these will happen whenever an error is not handled with the HandleErrorAttribute from inside of the pipeline. <system.web>  <customErrors mode="On" defaultRedirect="~/error">     <error statusCode="404" redirect="~/error/notfound"></error>  </customErrors>Sample Controllers public class ExampleController : Controller {     public ActionResult Exception()     {         throw new ArgumentNullException();     }     public ActionResult Db()     {         // Inherits from DbException         throw new MyDbException();     } } public class ErrorController : Controller {     public ActionResult Index()     {         return View();     }     public ActionResult NotFound()     {         return View();     } } Putting It All Together If we have all the code above included in our MVC 3 project, here is how the following scenario's will play out: 1.       A controller action throws an Exception. You will remain on the current page and the global HandleErrorAttributes will render the Error view. 2.       A controller action throws any type of DbException. You will remain on the current page and the global HandleErrorAttributes will render the DbError view. 3.       Go to a non-existent page. You will be redirect to the Error controller's NotFound action by the CustomErrors configuration for HTTP StatusCode 404. But don't take my word for it, download the sample project and try it yourself. Three Important Lessons Learned For the most part this is all pretty straight forward, but there are a few gotcha's that you should remember to watch out for: 1) Error views have models, but they must be of type HandleErrorInfo. It is confusing at first to think that you can't control the M in an MVC page, but it's for a good reason. Errors can come from any action in any controller, and no redirect is taking place, so the view engine is just going to render an error view with the only data it has: The HandleError Info model. Do not try to set the model on your error page or pass in a different object through a controller action, it will just blow up and cause a second exception after your first exception! 2) When the HandleErrorAttribute renders a page, it does not pass through a controller or an action. The standard web.config CustomErrors literally redirect a failed request to a new page. The HandleErrorAttribute is just rendering a view, so it is not going to pass through a controller action. But that's ok! Remember, a controller's job is to get the model for a view, but an error already has a model ready to give to the view, thus there is no need to pass through a controller. That being said, the normal ASP.NET custom errors still need to route through controllers. So if you want to share an error page between the HandleErrorAttribute and your web.config redirects, you will need to create a controller action and route for it. But then when you render that error view from your action, you can only use the HandlerErrorInfo model or ViewData dictionary to populate your page. 3) The HandleErrorAttribute obeys if CustomErrors are on or off, but does not use their redirects. If you turn CustomErrors off in your web.config, the HandleErrorAttributes will stop handling errors. However, that is the only configuration these two mechanisms share. The HandleErrorAttribute will not use your defaultRedirect property, or any other errors registered with customer errors. In Summary The HandleErrorAttribute is for displaying 500 errors that were caused by exceptions inside of the MVC pipeline. The custom errors are for redirecting from error pages caused by other HTTP codes.

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