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• Printing fails after first print with Centos 6 and HP LaserJet P3015dn printer

  - by Gavin Simpson

  Centos 6 recognises and configures a HP LaserJet P3015dn printer connected via USB. This machine is being configured as a small group file/print server. I can print a test page, which is processed/printed correctly. The next time printing is attempted (say printing a second test page), the page is not printed and the printer is set to disabled. The status of the printer is stated as: Stopped - /usr/lib/cups/backend/hp failed in the printer configuration dialogue. /var/log/cups/error_log contains this information (first two lines were there prior to the failed print job) E [24/Jun/2004:09:12:57 +0100] Returning HTTP Forbidden for Resume-Printer (ipp://localhost/printers/HP-LaserJet-P3010-Series) from localhost E [24/Jun/2004:09:20:59 +0100] Returning HTTP Forbidden for CUPS-Delete-Printer (ipp://localhost/printers/HP-LaserJet-P3010-Series) from localhost D [24/Jun/2004:09:37:28 +0100] [Job 28] The following messages were recorded from 09:36:43 AM to 09:37:28 AM D [24/Jun/2004:09:37:28 +0100] [Job 28] Adding start banner page "none". D [24/Jun/2004:09:37:28 +0100] [Job 28] Adding end banner page "none". D [24/Jun/2004:09:37:28 +0100] [Job 28] File of type application/vnd.cups-banner queued by "gavin". D [24/Jun/2004:09:37:28 +0100] [Job 28] hold_until=0 D [24/Jun/2004:09:37:28 +0100] [Job 28] Queued on "HP-LaserJet-P3010-Series" by "gavin". D [24/Jun/2004:09:37:28 +0100] [Job 28] job-sheets=none,none D [24/Jun/2004:09:37:28 +0100] [Job 28] argv[0]="HP-LaserJet-P3010-Series" D [24/Jun/2004:09:37:28 +0100] [Job 28] argv[1]="28" D [24/Jun/2004:09:37:28 +0100] [Job 28] argv[2]="gavin" D [24/Jun/2004:09:37:28 +0100] [Job 28] argv[3]="Test Page" D [24/Jun/2004:09:37:28 +0100] [Job 28] argv[4]="1" D [24/Jun/2004:09:37:28 +0100] [Job 28] argv[5]="job-uuid=urn:uuid:b3370a97-4ab6-3451-40a2-6239b13fa3e1 job-originating-host-name=localhost" D [24/Jun/2004:09:37:28 +0100] [Job 28] argv[6]="/var/spool/cups/d00028-001" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[0]="CUPS_CACHEDIR=/var/cache/cups" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[1]="CUPS_DATADIR=/usr/share/cups" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[2]="CUPS_DOCROOT=/usr/share/cups/www" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[3]="CUPS_FONTPATH=/usr/share/cups/fonts" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[4]="CUPS_REQUESTROOT=/var/spool/cups" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[5]="CUPS_SERVERBIN=/usr/lib/cups" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[6]="CUPS_SERVERROOT=/etc/cups" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[7]="CUPS_STATEDIR=/var/run/cups" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[8]="HOME=/var/spool/cups/tmp" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[9]="PATH=/usr/lib/cups/filter:/usr/bin:/usr/sbin:/bin:/usr/bin" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[10]="[email protected]" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[11]="SOFTWARE=CUPS/1.4.2" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[12]="TMPDIR=/var/spool/cups/tmp" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[13]="USER=root" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[14]="CUPS_SERVER=/var/run/cups/cups.sock" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[15]="CUPS_ENCRYPTION=IfRequested" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[16]="IPP_PORT=631" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[17]="CHARSET=utf-8" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[18]="LANG=en_US.UTF-8" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[19]="PPD=/etc/cups/ppd/HP-LaserJet-P3010-Series.ppd" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[20]="RIP_MAX_CACHE=8m" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[21]="CONTENT_TYPE=application/vnd.cups-banner" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[22]="DEVICE_URI=hp:/usb/HP_LaserJet_P3010_Series?serial=VNBV993GM4" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[23]="PRINTER_INFO=Hewlett-Packard HP LaserJet P3010 Series" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[24]="PRINTER_LOCATION=electra.geog.ucl.ac.uk" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[25]="PRINTER=HP-LaserJet-P3010-Series" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[26]="CUPS_FILETYPE=document" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[27]="FINAL_CONTENT_TYPE=application/vnd.cups-postscript" D [24/Jun/2004:09:37:28 +0100] [Job 28] Started filter /usr/lib/cups/filter/bannertops (PID 2858) D [24/Jun/2004:09:37:28 +0100] [Job 28] Started filter /usr/lib/cups/filter/pstops (PID 2859) D [24/Jun/2004:09:37:28 +0100] [Job 28] Started backend /usr/lib/cups/backend/hp (PID 2860) D [24/Jun/2004:09:37:28 +0100] [Job 28] load_banner(filename="/var/spool/cups/d00028-001") D [24/Jun/2004:09:37:28 +0100] [Job 28] Page = 612x792; 12,12 to 600,780 D [24/Jun/2004:09:37:28 +0100] [Job 28] Page = 612x792; 12,12 to 600,780 D [24/Jun/2004:09:37:28 +0100] [Job 28] slow_collate=0, slow_duplex=0, slow_order=0 D [24/Jun/2004:09:37:28 +0100] [Job 28] Before copy_comments - %!PS-Adobe-3.0 D [24/Jun/2004:09:37:28 +0100] [Job 28] %!PS-Adobe-3.0 D [24/Jun/2004:09:37:28 +0100] [Job 28] %%BoundingBox: 12 12 600 780 D [24/Jun/2004:09:37:28 +0100] [Job 28] %cupsRotation: 0 D [24/Jun/2004:09:37:28 +0100] [Job 28] %%Creator: bannertops/CUPS v1.4.2 D [24/Jun/2004:09:37:28 +0100] [Job 28] %%CreationDate: Thu 24 Jun 2004 09:36:43 AM BST D [24/Jun/2004:09:37:28 +0100] [Job 28] %%LanguageLevel: 2 D [24/Jun/2004:09:37:28 +0100] [Job 28] %%DocumentData: Clean7Bit D [24/Jun/2004:09:37:28 +0100] [Job 28] %%Title: (Test Page) D [24/Jun/2004:09:37:28 +0100] [Job 28] %%For: (gavin) D [24/Jun/2004:09:37:28 +0100] [Job 28] %%Pages: 1 D [24/Jun/2004:09:37:28 +0100] [Job 28] %%DocumentSuppliedResources: font Monospace D [24/Jun/2004:09:37:28 +0100] [Job 28] %%+ font Monospace-Bold D [24/Jun/2004:09:37:28 +0100] [Job 28] %%+ font Monospace-BoldOblique D [24/Jun/2004:09:37:28 +0100] [Job 28] %%+ font Monospace-Oblique D [24/Jun/2004:09:37:28 +0100] [Job 28] %%EndComments D [24/Jun/2004:09:37:28 +0100] [Job 28] Before copy_prolog - %%BeginProlog D [24/Jun/2004:09:37:28 +0100] [Job 28] STATE: +connecting-to-device D [24/Jun/2004:09:37:28 +0100] [Job 28] prnt/backend/hp.c 762: ERROR: cannot open channel PRINT D [24/Jun/2004:09:37:28 +0100] [Job 28] Backend returned status 1 (failed) D [24/Jun/2004:09:37:28 +0100] [Job 28] Printer stopped due to backend errors; please consult the error_log file for details. D [24/Jun/2004:09:37:28 +0100] [Job 28] End of messages D [24/Jun/2004:09:37:28 +0100] [Job 28] printer-state=5(stopped) D [24/Jun/2004:09:37:28 +0100] [Job 28] printer-state-message="/usr/lib/cups/backend/hp failed" D [24/Jun/2004:09:37:28 +0100] [Job 28] printer-state-reasons=paused /var/log/messages contains the following reports associated with the recognition of the printer and the failed print job: Jun 24 09:35:07 electra kernel: usb 1-8: new high speed USB device using ehci_hcd and address 2 Jun 24 09:35:07 electra kernel: usb 1-8: New USB device found, idVendor=03f0, idProduct=8d17 Jun 24 09:35:07 electra kernel: usb 1-8: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Jun 24 09:35:07 electra kernel: usb 1-8: Product: HP LaserJet P3010 Series Jun 24 09:35:07 electra kernel: usb 1-8: Manufacturer: Hewlett-Packard Jun 24 09:35:07 electra kernel: usb 1-8: SerialNumber: VNBV993GM4 Jun 24 09:35:07 electra kernel: usb 1-8: configuration #1 chosen from 1 choice Jun 24 09:35:07 electra kernel: usblp0: USB Bidirectional printer dev 2 if 0 alt 1 proto 2 vid 0x03F0 pid 0x8D17 Jun 24 09:35:07 electra kernel: usbcore: registered new interface driver usblp Jun 24 09:35:07 electra udev-configure-printer: invalid or missing IEEE 1284 Device ID Jun 24 09:35:08 electra hp[1942]: io/hpmud/pp.c 627: unable to read device-id ret=-1 Jun 24 09:35:09 electra python: io/hpmud/pp.c 627: unable to read device-id ret=-1 Jun 24 09:35:51 electra kernel: usblp0: removed Jun 24 09:37:28 electra hp[2860]: io/hpmud/dot4.c 254: unable to read Dot4ReverseReply data: Resource temporarily unavailable exp=2 act=0 Jun 24 09:37:28 electra hp[2860]: io/hpmud/dot4.c 330: invalid DOT4InitReply: cmd=0, result=20#012, revision=0 Jun 24 09:37:28 electra hp[2860]: prnt/backend/hp.c 762: ERROR: cannot open channel PRINT I am now at a loss as to how to proceed to get this printer working on my Centos machine. How can I configure the machine to print more than a single print job without needing to be unplugged/plugged in repeatedly?

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• Home workers requiring simultaneous office VPN and local network access

  - by jon.simpson.uk

  I now have a large number of remote users that are using a Check Point Secure Client VPN connection into the office. These users also need access to network resources attached to their local router/hub (network storage and network printer). Is there any way that the client (Windows 7 or XP) can be configured to bypass the VPN for local addresses (192.*)

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• Strange DNS problem [seems to be IPv6 issue]

  - by Homer J. Simpson

  Hi, I'm experiencing strange problems with my Kubuntu 9.10 when doing DNS requests from various applications. The requests are extremely slow, so loading any pages in Firefox or Konqueror, doing package installations in Kpackagemanager and other apps is really painful, while for example Opera doesnt have any problems, and ping is normally fast as well for DNS pings. I checked the proxy settings of both the used applications as well as of the general system and there are none, so to me it doesn't seem as there was something inbetween.. Does anybody have an idea on what to check for possible problem sources or how to solve this ? I'm behind a DSL home router which does the DHCP (and works well with my other computer). Any kind of advice would be really helpful. Edit: It seems to be some kind of IPv6 problem, as I could get it to work by disabling IPv6 explicitly in Firefox. Is there a general solution to this ?

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• Hook into linux mount/umount event

  - by Homer J. Simpson

  Hi, is there a way to provide post-mount and pre-umount scripts in Linux ? I am trying to do some scripts on storage media when mounted and before umounting (for synching). Any help appreciated.

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• Viewpoint gem and Exchange resource account

  - by scott.simpson

  Hi- I'm trying my hand at using the Viewpoint gem (by zenchild @ github) as the base for a meeting scheduling system. It's great at reading calendar information from regular Exchange 2007 accounts, but I got stuck trying to change the SOAP request header to allow me to read resource accounts as a delegate. I came across http://blogs.msdn.com/b/mstehle/archive/2009/06/16/exchange-api-team-blog-exchange-impersonation-vs-delegate-access.aspx and it seems to be what I need, and I have the feeling I'm on the edge of getting it working, but I'm just not quite there yet as a ruby programmer. Any help would be appreciated... Thanks!

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• How to extract jpegs from a video file using ffmpeg

  - by Andrew Simpson

  I am using C# and ffmpeg. In this scenario I have 279 individual jpegs and i have used ffmpeg to create a AVI file from these images on my client. CMD Line: -f image2 -r 10 -i "C:\000EC902F17F\img%05d.jpg" -s 352x288 -y "C:\1\test.avi" I then upload to my server. CMD Line: -i c:\1\1.avi c:\1\img-%05d.jpg I then extract jpegs from the AVI file. I get 265 jpegs back. Obviously ffmpeg is dropping these frames (most probable) when the avi is 1st created. Is there a way to 'force' to encode using ALL the images I have? Thanks. PS I did not specify any command line option other than the size of the video output. As far as I am aware if none are specified then ffmpeg automatically chooses the best ones?

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• Is this a valid backup strategy for MongoDB?

  - by James Simpson

  I've got a single dedicated server with a MongoDB database of around 10GB. I need to do daily backups, but I can't have downtime with the database. Is it possible to use a replica set on a single disk (with 2 instances of mongod running on different ports), and simply take the secondary one offline and backup the data files to an offsite storage such as S3 (journaling is turned on)? Or would using master/slave be better than a replica set? Is this viable, and if so, what potential problems could I have? If not, how do I conceptualize this to work?

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• What are some general tips to make InnoDB for MySQL perform at its highest?

  - by James Simpson

  I've been using MyISAM exclusively for several years now and know the ins-and-outs pretty well of how to optimize it, but I've just recently started using InnoDB for some of my tables and don't know that much about it. What are some general tips to help improve the performance of these InnoDB tables (they were converted from MyISAM and have anywhere from 100k - 2M rows and most won't use transactions).

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• Will adding extra RAM in my computer speed it up?

  - by Harry Simpson

  I have a 5 year old Dell Inspiron 530 desktop computer which is slowly grinding to a halt. Someone told me if i put extra RAM in itll speed it up. Inside the computer there are four slots for memory but only two has memory in them and they are 1GB each. if i bought another 2no. 1GB and put them in the free slots would it speed the computer up (would it be twice as fast?) and is it as simple as just putting them in or is there other things i need to do?

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• YouTube API @ Google I/O 2010

  Kuan Yong, Gareth McSorley and I -- representing Product Management, Engineering, and Developer Relations, respectively -- were happy to present a YouTube API session at this year’s Google...

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• NHibernate HiLo - new column per entity and HiLo catches

  - by Gareth

  Im currently using the hilo id generator for my classes but have just been using the minimal of settings eg <class name="ClassA" <id name="Id" column="id" unsaved-value="0" <generator class="hilo" / </id ... But should I really be specifying a new column for NHibernate to use foreach entity and providing it with a max lo? <class name="ClassA" <id name="Id" column="id" unsaved-value="0" <generator class="hilo" <param name="table"hibernate_unique_key</param <param name="column"classA_nexthi</param <param name="max_lo"20</param </generator </id ... <class name="ClassB" <id name="Id" column="id" unsaved-value="0" <generator class="hilo" <param name="table"hibernate_unique_key</param <param name="column"classB_nexthi</param <param name="max_lo"20</param </generator </id ... Also I've noticed that when I do the above the SchemaExport will not create all the columns - only classB_nexthi, is there something else im doing wrong. Thanks

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• "Simple" Text replace function

  - by YourMomzThaBomb

  I have a string which is basically a list of "words" delimited by commas. These "words" can be pretty much any character e.g. "Bart Simpson, Ex-girlfriend, dude, radical" I'm trying to use javascript, jQuery, whatever i can to replace a word based on a search string with nothing (in essence, removing the word from the list). For example, the function is defined as such: function removeWord(myString, wordToReplace) {...}; So, passing the string listed above as myString and passing "dude" as wordToReplace would return the string "Bart Simpson, Ex-girlfriend, radical" Here's the line of code I was tinkering around with...please help me figure out what's wrong with it or some alternative (better) solution:$myString.val($myString.val().replace(/wordToReplace\, /, ""));

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• How do I compress a Json result from ASP.NET MVC with IIS 7.5

  - by Gareth Saul

  I'm having difficulty making IIS 7 correctly compress a Json result from ASP.NET MVC. I've enabled static and dynamic compression in IIS. I can verify with Fiddler that normal text/html and similar records are compressed. Viewing the request, the accept-encoding gzip header is present. The response has the mimetype "application/json", but is not compressed. I've identified that the issue appears to relate to the MimeType. When I include mimeType="*/*", I can see that the response is correctly gzipped. How can I get IIS to compress WITHOUT using a wildcard mimeType? I assume that this issue has something to do with the way that ASP.NET MVC generates content type headers. The CPU usage is well below the dynamic throttling threshold. When I examine the trace logs from IIS, I can see that it fails to compress due to not finding a matching mime type. <httpCompression directory="%SystemDrive%\inetpub\temp\IIS Temporary Compressed Files" noCompressionForProxies="false"> <scheme name="gzip" dll="%Windir%\system32\inetsrv\gzip.dll" /> <dynamicTypes> <add mimeType="text/*" enabled="true" /> <add mimeType="message/*" enabled="true" /> <add mimeType="application/x-javascript" enabled="true" /> <add mimeType="application/json" enabled="true" /> </dynamicTypes> <staticTypes> <add mimeType="text/*" enabled="true" /> <add mimeType="message/*" enabled="true" /> <add mimeType="application/x-javascript" enabled="true" /> <add mimeType="application/atom+xml" enabled="true" /> <add mimeType="application/xaml+xml" enabled="true" /> <add mimeType="application/json" enabled="true" /> </staticTypes> </httpCompression>

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• Idiots guide to app engine and memcache

  - by Gareth Simpson

  I am struggling to find a good tutorial or best practices document for the use of memcache in app engine. I'm pretty happy with it on the level presented in the docs. Get an object by ID, checking memcache first, but I'm unclear on things like: If you cache a query, is there an accepted method for ensuring that the cache is cleared/updated when an object stored in that query is updated. What are the effects of using ReferenceProperties ? If a cache a Foo object with a Bar reference. Is my foo.bar in memcache too and in need of clearing down if it gets updated from some other part of my application. I don't expect answers to this here (unless you are feeling particularly generous!), but pointers to things I could read would be very gratefully received.

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• Using Castle DynamicProxy is it possible to change the invocation target on class proxy?

  - by Gareth D

  Hi Using Castle DynamicProxy v2, I'd like to change the target of an invocation for a class proxy. The new target is simply a different instance of the same type as the original target. The target types do not implement a common interface so I cannot use the IProxyTargetAccessor as detailed in Krzysztof's post on the subject - I cannot cast from a class proxy invocator to a IProxyTargetAccessor. Is there a way to do this?

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• Is there a Rails authentication library which separates users from login methods?

  - by Gareth

  In my mental model of authentication, a user should be distinct from the way they log in. So for example, a User could have an associated EmailLogin (with an email/password), or they could have many (or none). Similarly they could have 0..* associated OpenIDLogin credentials. Are there any existing authentication libraries for Rails which use this method? Alternatively, is this a really terrible idea?

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• SQL Server 2008 BIDS without the Database Engine

  - by Gareth Hill

  Does anyone know how we can install BIDS for SQL Server 2008 without having to install the Database Engine? With the SQL Server 2008 Express install it appears to be mandatory to install the Database Engine when all we would like the end users to have access to is BIDS to develop their RDL's to deploy to an existing SSRS instance? It looks like BIDS 2005 was available as a standalone download - the toolkit - however I cannot find anything similar for 2008.

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• How do I determine "Network Location" in .NET?

  - by Gareth

  In Windows 7 (and Vista I think), a network you're connected to is assigned to a "location" e.g. Home / Work or Public. Is it possible to determine the current network location programatically?

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• Efficient storage/retrieval method for replayable comet style applications (Google Wave, Etherpad)

  - by Gareth Simpson

  I am considering a web application that would have the same kind of multi user, automatic saving, infinite undo / replay capabilities that you see in Google Wave and Etherpad (albeit on a drastically smaller scale and userbase). Before I go away and reinvent the wheel, is this something that has already been addressed as either a piece of technology or library, or even just a design pattern. I know this isn't necessarily the best Stack Overflow question as there is probably not a "right" answer, but my Google-fu has failed me and I'd just like a reading list! Ordinarily I would be developing under python/django but this is not a firm requirement just a preference :)

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• Stop Rails from unloading a module in development mode

  - by Gareth

  I have a module in my Rails app that lives in /lib module MyModule mattr_accessor :the_variable class << self def setup yield this end end end From my environments/#{RAILS_ENV}.rb file I can then set an environment-specific value for the_variable: MyModule.setup do |my_module_config| my_module_config.the_variable = 42 end This is lovely, and it seems to work (almost) fine. The problem is that in development mode, Rails via ActiveSupport::Dependencies unloads a load of modules, and reloads them in time for the new request. This is usually a great behaviour because it means you don't need to restart your localhost server when you make a code change. However, this also clears out my initialised the_variable variable, and when the next request comes in the initialiser (obviously) isn't run again. The net effect is that subsequent requests end up having MyModule.the_variable set to nil rather than the 42 that I'm looking for. I'm trying to work out how to stop Rails unloading my module at the end of the request, or alternatively find another way to cleanly provide environment specific configuration for my modules. Any ideas? :-/

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• How to redirect a form's get variables with IIS7

  - by Gareth

  Is it possible (and if so how) to redirect the url from a forms get variables into something more url friendly using IIS 7's URL Rewrite module. An example would be /Catalog/Search/Title=Something&Order=Price into /Catalog/Search/Title/Something/Order/Price Thanks for any suggestions

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• StructureMap 'conditional singleton' for Lucene.Net IndexReader

  - by Gareth D

  I have a threadsafe object that is expensive to create and needs to be available through my application (a Lucene.Net IndexReader). The object can become invalid, at which point I need to recreate it (IndexReader.IsCurrent is false, need a new instance using IndexReader.Reopen). I'd like to able to use an IoC container (StructureMap) to manage the creation of the object, but I can't work out if this scenario is possible. It feels like some kind of "conditional singleton" lifecycle. Does StructureMap provide such a feature? Any alternative suggestions?

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• ASP.Net - Help with datagrid/checkboxes/double submit

  - by Gareth D

  We have a simple datagrid. Each row has a checkbox. The checkbox is set to autopostback, and the code-behind has an event handler for the checkbox check-changed event. This all works as expected, nothing complicated. However, we want to disable the checkboxes as soon as one is checked to prevent a double submit i.e. check box checked, all checkboxes are disabled via client side javascript, form submitted. To achieve this I we are injecting some code into the onclick event as follows (note that the alert is just for testing!): Protected Sub DgAccounts_ItemCreated(ByVal sender As System.Object, ByVal e As System.Web.UI.WebControls.DataGridItemEventArgs) Handles DgAccounts.ItemCreated If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType = ListItemType.AlternatingItem Then Dim chk As CheckBox = CType(e.Item.FindControl("chkItemChecked"), CheckBox) chk.Attributes.Add("onclick", "alert('fired ...');DisableAllDataGridCheckBoxes();") End If End Sub When inspecting the source of the rendered page we get the following: <input id="DgAccounts__ctl2_chkItemChecked" type="checkbox" name="DgAccounts:_ctl2:chkItemChecked" onclick="alert('fired ...');DisableAllDataGridCheckBoxes();setTimeout('__doPostBack(\'DgAccounts$_ctl2$chkItemChecked\',\'\')', 0)" language="javascript" /> It all appears in order, however the server side event does not fire – I believe this is due to the checkbox being disabled, as if we just leave the alert in and remove the call to disable the checkbox it all works fine. Can I force the check-changed event to fire even though the check box is disabled?

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• How to organise a many to many relationship in MongoDB

  - by Gareth Elms

  I have two tables/collections; Users and Groups. A user can be a member of any number of groups and a user can also be an owner of any number of groups. In a relational database I'd probably have a third table called UserGroups with a UserID column, a GroupID column and an IsOwner column. I'm using MongoDB and I'm sure there is a different approach for this kind of relationship in a document database. Should I embed the list of groups and groups-as-owner inside the Users table as two arrays of ObjectIDs? Should I also store the list of members and owners in the Groups table as two arrays, effectively mirroring the relationship causing a duplication of relationship information? Or is a bridging UserGroups table a legitimate concept in document databases for many to many relationships? Thanks

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• Lucene.Net - How to treat a space-seperated phrase as a single token?

  - by Gareth D

  I've implemented a search facility using Lucene.Net. The index includes UK academic qualifications, including "A Level". I'd like the users to be able to search using the phrase "A Level", but using the Standrad Analyser the "A" is stripped out as a stop-word and therefore only "Level" is indexed/searched. What's my best option to work around this? I'm guessing I need to somehow tokenise "A Level" to "A-Level" or similar by creating a custom analyser. Is this the best approach? Note that I want don't want the whole search to be a phrase query. i.e. in my search box I want the user to be able to enter <"A Level" AND English Maths Physics and this would return any with "A Level" and either of English MAths or Physics. Question updated to reflect this.

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