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• Need help troubleshooting why Solr wont start (or why solr admin page wont show)

  - by Camran

  I can't get Solr working. I have Jetty, and my server OS is Ubuntu 9.10. It is a VPS server. So, when I execute the java -jar start.jar everything seems fine. I even do a netstat to check if there are any listeners on the port before the start and after the start, and it seems solr is starting. However, I cant access the admin page. I have even turned off the firewall. Here is some info about my server: I have changed DocumentRoot to var/www/SV/ I have Apache2, PHP5, MySql installed I have "disabled" iptables firewall I have removed the htaccess files (I used them to passw protect my site under develop) I have installed JRE (NOT JDK) on my server. I use the "example" which comes with Solr, so I use Jetty as container on my Server. My Server has 768MB RAM Doing a java -version command shows this: java version "1.6.0_15" Java(TM) SE Runtime Environment (build 1.6.0_15-b03) Java HotSpot(TM) Client VM (build 14.1-b02, mixed mode) And in the terminal the last lines when executing start.jar is: May 29, 2010 1:30:03 PM org.apache.solr.core.SolrCore registerSearcher INFO: [] Registered new searcher Searcher@1dc64a5 main NOTE: Also before this last line, there is a line which makes me suspicious: Started SocketConnector @ 0.0.0.0:8983 // Should this be with leading zeros? Is there any ways you know to troubleshoot this? Memory issue maybe? Thanks

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• Gridview and Modal popup not updating

  - by rs

  I have page with following controls <asp:UpdatePanel ID="up1" runat="server" UpdateMode="Conditional"> <ContentTemplate> <uc2:CountryControl ID="Country1" runat="server" /> <br class = "br_e" /> <br class = "br_e" /> <asp:UpdatePanel ID="upCountry2" runat="server" UpdateMode="Conditional"> <ContentTemplate> <asp:Panel runat="server" ID="pnCountry" Width="400px" Visible="false"> <asp:GridView ID="gvCountry" runat="server" AllowSorting="true" DataKeyNames="countryid" DataSourceID="data_country1" AutoGenerateColumns="false"> <Columns> <asp:CommandField ButtonType="Link" ShowDeleteButton="true" /> <asp:BoundField HeaderText="Country" DataField="CountryName" SortExpression="CountryName" /> </Columns> </asp:GridView> <asp:SqlDataSource ID="data_country1" runat="server" ConnectionString="<%$ zyx %>" SelectCommand="xyz" SelectCommandType="StoredProcedure"> <SelectParameters> <asp:SessionParameter Name="country" DefaultValue="" ConvertEmptyStringToNull="true" SessionField="CountryID" Type="String" /> </SelectParameters> </asp:SqlDataSource> </asp:Panel> </ContentTemplate> </asp:UpdatePanel> </ContentTemplate> </asp:UpdatePanel> My user control is a modal popup to select country and add selected ids to a session variable. And in main page bind data using ids in session variable.Gridview - on deleting event i'm deleting that id from session and on deleted event updating both user control using a refresh method (Country1.Refresh()) and gridview panel. But updatepanel is not getting updated and even modalpopup is also not getting refreshed. What could be wrong here? Even though update and refresh events are fired and executed, why is page not getting updated?

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• Spy++ for PowerBuilder applications

  - by Frerich Raabe

  Hi, I'm trying to write a tool which lets me inspect the state of a PowerBuilder-based application. What I'm thinking of is something like Spy++ (or, even nicer, 'Snoop' as it exists for .NET applications) which lets me inspect the object tree (and properties of objects) of some PowerBuilder-based GUI. I did the same for ordinary (MFC-based) applications as well as .NET applications already, but unfortunately I never developed an application in PowerBuilder myself, so I'm generally thinking about two problems at this point: Is there some API (preferably in Java or C/C++) available which lets one traverse the tree of visual objects of a PowerBuilder application? I read up a bit on the PowerBuilder Native Interface system, but it seems that this is meant to write PowerBuilder extensions in C/C++ which can then be called from the PowerBuilder script language, right? If there is some API available - maybe PowerBuilder applications even expose some sort of IPC-enabled API which lets me inspect the state of a PowerBuilder object hierarchy without being within the process of the PowerBuilder application? Maybe there's an automation interface available, or something COM-based - or maybe something else? Right now, my impression is that probably need to inject a DLL into the process of the PowerBuilder application and then gain access to the running PowerBuilder VM so that I can query it for the object tree. Some sort of IPC mechanism will then let me transport this information out of the PowerBuilder application's process. Does anybody have some experience with this or can shed some light on whether anybody tried to do this already? Best regards, Frerich

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• Hidden div height (changing my advice)

  - by fudgey

  Ok, I was going to answer someone's question here on SO about why their script wasn't working. They loaded content into a hidden div, then got the height so they could animate the wrapping div. But I always try to test the code I provide. So I made this demo to prove it to them. So, umm, have I entered the twilight zone or am I dreaming right now? pinches self OUCH! I tried that demo in Firefox, IE and Chrome and both methods return the same value. Firebug says zero! I rebooted my computer and I even changed the code a bit (removed the height function) and tried it with jQuery 1.3.2 and it still worked! I know hidden elements USED to return a zero value. Even this SO Answer is giving the advice I would have! So I guess my question is... did I miss something or are we giving bad advice?

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• AppDomain.CurrentDomain.UnhandledException doesn't always fire up

  - by Simon T.

  I encountered an exception in our application that isn't handled at all. I really don't know what to look for to debug this problem since the application close immediately when this peculiar exception is thrown (even running from VS). The exception handling is setup that way: [STAThread] [LoaderOptimizationAttribute(LoaderOptimization.MultiDomainHost)] static void Main() { Application.SetUnhandledExceptionMode(UnhandledExceptionMode.CatchException); Application.ApplicationExit += new EventHandler(ApplicationExitHandler); Application.ThreadException += new ThreadExceptionEventHandler(ThreadExceptionHandler); AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(UnhandledExceptionHandler); ... The thread from which the exception is thrown is started that way: Thread executerThread = new Thread(new ThreadStart(modele.Exporter)); executerThread.SetApartmentState(ApartmentState.STA); executerThread.Start(); Now, every unhandled exception thrown from that thread fire up our UnhandledExceptionHandler except the one I have problems with. Even if I catch the problematic exception and throw it again, the application closes silently. None of the 3 handlers (ApplicationExit, ThreadException, UnhandledException) get fired (breakpoints not hit). There is nothing so exceptional in that exception (see details here: http://pastebin.com/fCnDRRiJ).

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• Practical value for concurrent-request-timeout parameter

  - by Andrei

  In the Seam Reference Guide, one can find this paragraph: We can set a sensible default for the concurrent request timeout (in ms) in components.xml: <core:manager concurrent-request-timeout="500" /> However, we found that 500 ms is not nearly enough time for most of the cases we had to deal with, especially with the severe restriction seam places on conversation access. In our application we have a combination of page scoped ajax requests (triggered by various use actions), some global scoped polling notification logic (part of the header, so included in every page) and regular links that invoke actions and/or navigate to other pages. Therefore, we get the dreaded concurrent access to conversation exception way too often, even without any significant load on the site. After researching the options for quite a bit, we ended up bumping this value to several seconds (we're debating whether to bump it up to 10s), as none of the recommended solutions seemed able to solve our issue completely (even forcing a global queue for all the ajax requests would still leave us exposed to a user deciding to click a link right when one of our polling calls was in progress). And we'd much rather have the users wait for a second or two instead of getting an error page just because they clicked a link at the wrong moment. And now to the question: is there something obvious we're missing (like a way to allow concurrent access to conversations and taking care of the needed locking ourselves, for instance :)? How do people solve this problem (ajax requests mixed with user driven interaction) in seam? Disabling all the links on the page while ajax requests are in progress (as suggested by one blog page) is really not a viable option. Any other suggestions? TIA, Andrei

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• A PHP script to stream internet radio?

  - by Honus Wagner

  I've been searching and searching and I haven't yet come up with a solution to host my own streaming audio player. I'm looking for a way to host an internet radio player that connects to whatever streams I enter in and plays them. I'm not looking to play my MP3s or anything like that. I'm looking to play content from 181.fm or 1Club.fm, for example. I'd even settle for ShoutCast-only streams. I've been to www.wavestreaming.com but it didnt work for me. I'm guessing its because in the very first box where you enter your website url, it leads in for you: http//www. then you fill in the rest. My site is https:// and does not contain a www. in the URL. I'm guessing that has something to do with it. Any links, suggestions for search topics, or even a brief technical overview of what I should be looking into would be greatly appreciated. Thanks for your time.

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• Sending Email from Lotus Notes using Excel and having Attachment & HTML body

  - by Anthony

  Right I'm trying to send an Email form an excel spreadsheet though lotus notes, it has an attachment and the body needs to be in HTML. I've got some code that from all I've read should allow me to do this however it doesn't. Without the HTML body the attachment will send, when I impliment a HTML body the Email still sends but the attachment dissapears, I've tried rearanging the order of the code cutting out bits that might not be needed but all is invain. (You need to reference Lotus Domino Objects to run this code. strEmail is the email addresses strAttach is the string location of the attachment strSubject is the subject text strBody is the body text ) Sub Send_Lotus_Email(strEmail, strAttach, strSubject, strBody) Dim noSession As Object, noDatabase As Object, noDocument As Object Dim obAttachment As Object, EmbedObject As Object Const EMBED_ATTACHMENT As Long = 1454 Set noSession = CreateObject("Notes.NotesSession") Set noDatabase = noSession.GETDATABASE("", "") 'If Lotus Notes is not open then open the mail-part of it. If noDatabase.IsOpen = False Then noDatabase.OPENMAIL 'Create the e-mail and the attachment. Set noDocument = noDatabase.CreateDocument Set obAttachment = noDocument.CreateRichTextItem("strAttach") Set EmbedObject = obAttachment.EmbedObject(EMBED_ATTACHMENT, "", strAttach) 'Add values to the created e-mail main properties. With noDocument .Form = "Memo" .SendTo = strEmail '.Body = strBody ' Where to send the body if HTML body isn't used. .Subject = strSubject .SaveMessageOnSend = True End With noSession.ConvertMIME = False Set Body = noDocument.CreateMIMEEntity("Body") ' MIMEEntity to support HTML Set stream = noSession.CreateStream Call stream.WriteText(strBody) ' Write the body text to the stream Call Body.SetContentFromText(stream, "text/html;charset=iso-8859-1", ENC_IDENTITY_8BIT) noSession.ConvertMIME = True 'Send the e-mail. With noDocument .PostedDate = Now() .Send 0, strEmail End With 'Release objects from the memory. Set EmbedObject = Nothing Set obAttachment = Nothing Set noDocument = Nothing Set noDatabase = Nothing Set noSession = Nothing End Sub If somone could point me in the right direction I'd be greatly appreciated. Edit: I've done a little more investigating and I've found an oddity, if i look at the sent folder the emails all have the paperclip icon of having an attachment even though when you go into the email even in the sent the HTML ones don't show an attachment.

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• Android/Java -- Post simple text to Facebook wall?

  - by borg17of20

  Hello all, I'm trying to integrate posting to one's wall from within my app. I already have an area where the user can save his/her username and password (encrypted). I would like my program to recall the saved username and password, pass that to Facebook for authentication, and then allow the app to post simple text (maybe a link too) to the user's wall. That said, I've read everything on the developer pages at Facebook (the api looks completely foreign to me... I've never don't any type of web app development before... just desktop apps), and experimented with the Java libraries here: http://wiki.developers.facebook.com/index.php/User:Java but to be honest, I don't understand any of the various implementations. Some claim to be simple to use, but apparently they are all way above my head. I've even tried messing with the official Facebook Android SDK, but that uses a webview interface, and I can't pass in the username and password for easy authentication. Plus, I'm still clueless as to how to post to the wall even after correct authentication. Please help. Thanks. Oh, btw I already have a Facebook API key and Application ID.

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• number->string and related procedures in GIMP scheme scripting

  - by dim fish

  I am frustrated with string-to-number and number-to-string conversion in GIMP scripting. I am runnning GIMP 2.6.8 in Windows Vista. I understand that GIMP's internal Scheme implementation changes over the versions and I can't seem to nail down the documentation. From what I can gather GIMP's Scheme is a subset of TinyScheme and/or supports the R5RS standard procedures. In any case, I usually just look in the packaged script directory for examples when I want to try something new, because that should work for sure, right? For example, grid-system.scm comes with the latest GIMP release and has the expression, (string-append (number->string obj) " ") which is exactly what I want. However, if I use number-string in my own script, or even type it into GIMP's script console (which is how I usually test out new stuff I want to do) it tells me number-string is an unbound variable: > (number->string 3) Error: eval: unbound variable: number->string Other standard procedures from, say R5RS, work just fine: > (string-append "frust" "rated") "frustrated" So, 1) Is there some lurking documentation for current GIMP Scheme scripting other than something drastic like searching GIMP's source code? 2) Can I use the GIMP console to spit out a list of all defined procedures to find something I need? 3) Anyone else confirm that number-string is not defined for the current Windows build, even though it appears in the packaged scripts? My web searches haven't turned up any related problems, and a complete uninstall of all GIMP versions, back to latest puts me in the same scrape.

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• Understanding Flash SWC's imported into Flex Builder 3 and key framed animation

  - by Hank Scorpio

  I am trying to understand what is going on in a SWC that I am importing from Flash CS4 into Flex Builder 3. Specifically I am using a SWC supplied by a Designer as the animation for a custom preloader (a subclassed DownloadProgressBar). The issue I am trying to understand is, once the FlexEvent.INIT_COMPLETE is fired, I cleanup by removing the swc by running this : removeChild(myPreloader); myPreloader = null; though even after I have removed this (which is successful, as I have checked by comparing this.numChildren before and after the call) the key framed animation still continues to run (not visibly). This has been detected by the Designer placing a trace in the time line of the animation (in Flash). Can anyone tell me why is it, that even after I have removed the animation from the subclassed DownloadProgressBar, it still keeps running ? Also, is it standard practice when importing SWCs to manage the cleanup of resources from the Flash side of things (much like releasing memory in obj-c). I find it counter intuitive that removing the child from the Flex side does not stop the animation. Any clues to this would be greatly appreciated.

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• How to improve the use of Delphi Frames

  - by Brian Frost

  I've used frames in Delphi for years, and they are one of the most powerful features of the VCL, but standard use of them seems to have some risk such as: It's easy to accidentally move or edit the frame sub-components on a frame's host form without realising that you are 'tweaking' with the frame - I know this does not affect the original frame code, but it's generally not what you would want. When working with the frame you are still exposed to its sub-components for visual editing, even when that frame is years old and should not be touched. So I got to thinking.... Is there a way of 'grouping' components such that their positions are 'locked'? This would be useful for finished forms as well as frames. Often other developers return code to me where only the form bounds have changed and even they did not intend any change. Is there any way of turning a frame and its components into a single Delphi component? If so, the frame internals would be completely hidden and its useability would increase further. I'm interested in any thoughts... Brian.

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• How to set up RPX widget and facebook app to be able to authenticate with rpx_now?

  - by Andrei

  Using the sample app for rpx_now gem ( http://github.com/grosser/rpx_now_example) on localhost:3000, I have successfully logged in via Google Accounts, myOpenID, Yahoo, but cannot make it via Facebook. In the RPX app/widget settings I have set my facebook-app key and secret. In my facebook app settings, the Connect URL is myappname.rpxnow.com. But when I try to connect, then I don't even see a facebook login page, just a number of redirects and I am back to my localhost with the following exception http://gist.github.com/386520 . Before I was successfully connecting with oauth2 gem, however, without fetching user data - only authentication. That time I set only key/secret and localhost as my Connect URL. Currently, I don't even ask for email etc., but still the same problem. Can it happen because rpx_now cannot get requested user data from facebook? Or it is a problem of facebook key/secret? May be I need to provide more settings of my facebook app? RPXNow::ApiError in UsersController#create Got error: Invalid parameter: token (code: 1), HTTP status: 200 RAILS_ROOT: /home/Andrei/rpx_now_example Application Trace | Framework Trace | Full Trace /usr/lib/ruby/gems/1.8/gems/rpx_now-0.6.20/lib/rpx_now/api.rb:71:in `parse_response' /usr/lib/ruby/gems/1.8/gems/rpx_now-0.6.20/lib/rpx_now/api.rb:21:in `call' /usr/lib/ruby/gems/1.8/gems/rpx_now-0.6.20/lib/rpx_now.rb:23:in `user_data' /home/Andrei/rpx_now_example/app/controllers/users_controller.rb:16:in `create' Request Parameters: None Show session dump Response Headers: {"Content-Type"="", "Cache-Control"="no-cache"}

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• Facebook XFBML IFrame App

  - by user329379

  Hi Guys, I started creating an application utilizing FBML but quickly realized its limits as far as external sources like javascript and so forth. I had just finished the app and now I am looking to convert it to XFBML so I can use external javascripts. I am having an issue with the login function. It allows a user to login when I goto my site but if i go to the facebook app page my button to login still appears in the frame (even though I am already logged into facebook). Upon clicking login the app fucntions as expected. My question is why do i have to click login even though I am already logged in? On the actual website it processes the app as if I am already logged in. Below is some of my code... $FB_APP_URL = 'http://apps.facebook.com/XXXXXX'; $facebook = new Facebook($api_key, $secret); $facebook-api_client-setFormat('json'); $user = $facebook-get_loggedin_user(); if (!$user) { $facebook->redirect($facebook->get_login_url($FB_APP_URL, 1)); } if (!$facebook-in_frame()) { $facebook-redirect($FB_APP_URL, 1); }

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• Nested multithread operations tracing

  - by Sinix

  I've a code alike void ExecuteTraced(Action a, string message) { TraceOpStart(message); a(); TraceOpEnd(message); } The callback (a) could call ExecuteTraced again, and, in some cases, asynchronously (via ThreadPool, BeginInvoke, PLINQ etc, so I've no ability to explicitly mark operation scope). I want to trace all operation nested (even if they perform asynchronously). So, I need the ability to get last traced operation inside logical call context (there may be a lot of concurrent threads, so it's impossible to use lastTraced static field). There're CallContext.LogicalGetData and CallContext.LogicalSetData, but unfortunately, LogicalCallContext propagates changes back to the parent context as EndInvoke() called. Even worse, this may occure at any moment if EndInvoke() was called async. http://stackoverflow.com/questions/883486/endinvoke-changes-current-callcontext-why Also, there is Trace.CorrelationManager, but it based on CallContext and have all the same troubles. There's a workaround: use the CallContext.HostContext property which does not propagates back as async operation ended. Also, it does'nt clone, so the value should be immutable - not a problem. Though, it's used by HttpContext and so, workaround is not usable in Asp.Net apps. The only way I see is to wrap HostContext (if not mine) or entire LogicalCallContext into dynamic and dispatch all calls beside last traced operation. Help, please!

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• Django DRY Feeds

  - by Mandx

  I'm using the Django Feeds Framework and it's really nice, very intuitive and easy to use. But, I think there is a problem when creating links to feeds in HTML. For example: <link rel="alternate" type="application/rss+xml" title="{{ feed_title }}" href="{{ url_of_feed }}" /> Link's HREF attribute can be easily found out, just use reverse() But, what about the TITLE attribute? Where the template engine should look for this? Even more, what if the feed is build up dinamically and the title depends on parameters (like this)? I can't come up with a solution that "seems" DRY to me... All that I can come up with is using context processors o template tags, but it gets messy when the context procesor/template tag has to find parameters to construct the Feed class, and writing this I realize I don't even know how to create a Feed instance myself within the view. If I put all this logic in the view, it would not be just one view. Also, the value for TITLE would be in the view AND in the feed.

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• Jetty startup delay

  - by Tauren

  I'm trying to figure out what would be causing a 1 minute delay in the startup of Jetty. Is it a configuration problem, my application, or something else? I have Jetty 7 (jetty-7.0.1.v20091125 25 November 2009) installed on a server and I deploy a 45MB ROOT.war file into the webapps directory. This is the only webapp configured in Jetty. I then start Jetty with the command: java -DSTOP.PORT=8079 -DSTOP.KEY=mystopkey -Denv=stage -jar start.jar etc/jetty-logging.xml etc/jetty.xml & I get two lines of output right after doing this: 2010-03-07 14:20:06.642:INFO::Logging to StdErrLog::DEBUG=false via org.eclipse.jetty.util.log.StdErrLog 2010-03-07 14:20:06.710:INFO::Redirecting stderr/stdout to /home/zing/jetty-distribution-7.0.1.v20091125/logs/2010_03_07.stderrout.log When I press the enter key, I get my command prompt back. Looking at the log file (logs/2010_03_07.stderrout.log), I see the following at the beginning: 2010-03-07 14:08:50.396:INFO::jetty-7.0.1.v20091125 2010-03-07 14:08:50.495:INFO::Extract jar:file:/home/zing/jetty-distribution-7.0.1.v20091125/webapps/ROOT.war!/ to /tmp/Jetty_0_0_0_0_8080_ROOT.war___.8te0nm/webapp 2010-03-07 14:08:52.599:INFO::NO JSP Support for , did not find org.apache.jasper.servlet.JspServlet 2010-03-07 14:09:51.379:INFO::Set web app root system property: 'webapp.root' = [/tmp/Jetty_0_0_0_0_8080_ROOT.war___.8te0nm/webapp] 2010-03-07 14:09:51.585:INFO::Initializing Spring root WebApplicationContext INFO - ContextLoader - Root WebApplicationContext: initialization started INFO - XmlWebApplicationContext - Refreshing Root WebApplicationContext: startup date [Sun Mar 07 14:09:51 PST 2010]; root of context hierarchy ... Notice the 1 minute long pause between the 3rd and 4th lines. What is Jetty doing at this point? What other things could be going on? It doesn't even look like it has started my Spring initialization yet. Note that I checked my /tmp directory to see if it was simply the time to unpack my war file, but the file had been completely unpacked even at the start of this 1 minute delay.

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• ASP.NET MVC - PartialView not refreshing

  - by Billy Logan

  Hello Everyone, I have a view that uses a javascript callback to reload a partial view. For whatever reason the contents of the partial class do not refresh even though i can step through the entire process and see the page being recalled and populated. Any reason why the page would not display? Code is as follows: <div id="big_image_content"> <% Html.RenderPartial("ZoomImage", Model); %> </div> This link should reload the div above: <a href="javascript:void(0)" onclick="$('#big_image_content').load('/ShopDetai/ZoomImage);" title="<%= shape.Shape %>" alt="<%= shape.Shape %>"> <img src="http://images.rugs-direct.com/<%= shape.Image.ToLower() %>" width="40" alt="<%= shape.Shape %>"> </a> partial view(ZoomImage.ascx) simplified for now, but still doesn't load: <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<RugsDirect.Data.ItemDetailsModel>" %> <%= Model.Category.ToLower()%> And finally the controller side of things: public ActionResult ZoomImage() { try { ItemDetailsModel model = GetMainImageContentModel(); return PartialView("ZoomImage", model); } catch (Exception ex) { //send the error email ExceptionPolicy.HandleException(ex, "Exception Policy"); //redirect to the error page return RedirectToAction("ViewError", "Shop"); } } Again, i can step through this entire process and all seems to be working accept for the page not reloading. I can even break on the <%= Model.Category.ToLower()% of the partial view, but it will not be displayed. Thanks in advance, Billy

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• Error number 13 - Remote access svn with dav_svn failing

  - by C. Ross

  I'm getting the following error on my svn repository <D:error> <C:error/> <m:human-readable errcode="13"> Could not open the requested SVN filesystem </m:human-readable> </D:error> I've followed the instructions from the How to Geek, and the Ubuntu Community Page, but to no success. I've even given the repository 777 permissions. <Location /svn/myProject > # Uncomment this to enable the repository DAV svn # Set this to the path to your repository SVNPath /svn/myProject # Comments # Comments # Comments AuthType Basic AuthName "My Subversion Repository" AuthUserFile /etc/apache2/dav_svn.passwd # More Comments </Location> The permissions follow: drwxrwsrwx 6 www-data webdev 4096 2010-02-11 22:02 /svn/myProject And svnadmin validates the directory $svnadmin verify /svn/myProject/ * Verified revision 0. and I'm accessing the repository at http://ipAddress/svn/myProject Edit: The apache error log says [Fri Feb 12 13:55:59 2010] [error] [client <ip>] (20014)Internal error: Can't open file '/svn/myProject/format': Permission denied [Fri Feb 12 13:55:59 2010] [error] [client <ip>] Could not fetch resource information. [500, #0] [Fri Feb 12 13:55:59 2010] [error] [client <ip>] Could not open the requested SVN filesystem [500, #13] [Fri Feb 12 13:55:59 2010] [error] [client <ip>] Could not open the requested SVN filesystem [500, #13] Even though I confirmed that this file is ugo readable and writable. What am I doing wrong?

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• Setting up a "cookieless domain" to improve site performance

  - by Django Reinhardt

  I was reading in Google's documentation about improving site speed. One of their recommendations is serving static content (images, css, js, etc.) from a "cookieless domain": Static content, such as images, JS and CSS files, don't need to be accompanied by cookies, as there is no user interaction with these resources. You can decrease request latency by serving static resources from a domain that doesn't serve cookies. Google then says that the best way to do this is to buy a new domain and set it to point to your current one: To reserve a cookieless domain for serving static content, register a new domain name and configure your DNS database with a CNAME record that points the new domain to your existing domain A record. Configure your web server to serve static resources from the new domain, and do not allow any cookies to be set anywhere on this domain. In your web pages, reference the domain name in the URLs for the static resources. This is pretty straight forward stuff, except for the bit where it says to "configure your web server to serve static resources from the new domain, and do not allow any cookies to be set anywhere on this domain". From what I've read, there's no setting in IIS that allows you to say "serve static resources", so how do I prevent ASP.NET from setting cookies on this new domain? At present, even if I'm just requesting a .jpg from the new domain, it sets a cookie on my browser, even though our application's cookies are set to our old domain. For example, ASP.NET sets an ".ASPXANONYMOUS" cookie that (as far as I'm aware) we're not telling it to do. Apologies if this is a real newb question, I'm new at this! Thanks.

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• Weird error running com-exposed assembly

  - by Bernabé Panarello

  I am facing the following issue when deploying a com-exposed assembly to my client's. The COM component should be consummed by a vb6 application. Here's how it's done 1) I have one c# project which has a class with a couple of methods exposed to COM 2) The project has references to multiple assemblies 3) I compile the project, generating a folder (named dllcom) that contains the assembly plus all the referenced dlls 4) I include in the folder a .bat which does the following: regasm /u c:\dllcom\LibInsertador.dll del LibInsertador.tlb regasm c:\dllcom\LibInsertador.dll /tlb:c:\dllcom\LibInsertador.tlb /codebase c:\dllcom\ pause 5) After running the bat locally in many workstations of my laboratory, i'm able to consume the generated tlb from my vb6 application without any problems. I'm even able to update the dll by only means of running this bat, without having to recompile the vb6 application. I mean that im not having issues of vb6 fiding and invoking the exposed com object. The problem 6) I send the SAME FOLDER to my client 7) They execute the .bat locally, without any errors 8) They execute the vb6 application, vb6 finds the main assembly, the .net code seems to run correctly (it's even able to generate a log file) until it has to intantiate it's first referenced assembly. Then, they get the following exception: "Could not load type 'GYF.Common.TypeBuilder' from assembly 'GYF_Common, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'." Where "GYF.Common" is an assembly referenced by LibInsertador and TypeBuilder is a class contained in GYF.Common. GYF.Common is not a signed assembly and it's not in the GAC, just in the same folder with Libinsertador. According to .net reflector, the version is correct. ¿Any ideas about what could be happening?

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• Altering URLs and mapping - path_prefix? - Ruby on Rails...

  - by bgadoci

  Ok, so I am working on a blog application of sorts. Thus far, it allows for a user to sign up for their own account, create posts, tags, comments, etc. I have just implemented the ability to use www.myapp.com/brandon to set @user to find by username and therefore correctly display the users information at each url. So when you go to www.myapp.com/brandon you see all Brandon's posts, tags, and comments associated with those posts, etc. Works great. I implementing this URL mapping through the routes.rb file by adding the following: map.username_link '/:username', :controller => 'posts', :action => 'index' And then just setting the @user variable in the PostController and corresponding views to find_by_username. Now the issue is this. Once at www.myapp.com/brandon when you click on a post title, it sends to myapp.com/posts/id without the username in the URL which blows up my view because nothing is being set for the @user variable. How do I tell Rails to create the link reading www.myapp.com/brandon/posts/id vs www.myapp.com/posts/id and then map that action? I am assuming this will involve some code in the view, and then adding another line in the routes.rb file, map.subdomain_link '/:username/posts/:id', :controller => 'posts', :action => 'show' and adding the @user variable to the PostController#show action, but not totally sure if this is even the right approach. UPDATE: I have been reading about :path_prefix and seems like it might be what I am looking for. I have tried to implement simply by adding map.resources :posts, :path_prefix => '/:user_username/:post_id' to the routes.rb file but not working (even after server restart). I am sure this is not correct but wanted to let you know what I have tried.

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• javascript class calling XMLHttpRequest internally, then handling onreadystatechange

  - by Radu M

  this thing almost works: function myClass(url) { this.source = url; this.rq = null; this.someOtherProperty = "hello"; // open connection to the ajax server this.start = function() { if (window.XMLHttpRequest) { this.rq = new XMLHttpRequest(); if (this.rq.overrideMimeType) this.rq.overrideMimeType("text/xml"); } else this.rq = new ActiveXObject("Microsoft.XMLHTTP"); try { this.rq.onreadystatechange = connectionEvent; this.rq.open("GET", this.source, true); this.rq.send(null); this.state = 1; } catch (err) { // some error handler here } } function connectionEvent() { alert("i'm here"); alert("this doesnt work: " + this.someOtherProperty); } } // myClass so it's nothing more than having the XMLHttpRequest object as a member of my class, instead of globally defined, and invoking it in the traditional way. however, inside my connectionEvent callback function, the meaning of "this" is lost, even though the function itself is scoped inside myClass. i also made sure that the object that i instantiate from myClass is kept alive long enough (declared global in the script). in all the examples of using javascript classes that i saw, "this" was still available inside the inner functions. for me, it is not, even if i take my function outside and make it a myClass.prototype.connectionEvent. what am i doing wrong? thank you.

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• Spam proof hit counter in Django

  - by Jim Robert

  I already looked at the most popular Django hit counter solutions and none of them seem to solve the issue of spamming the refresh button. Do I really have to log the IP of every visitor to keep them from artificially boosting page view counts by spamming the refresh button (or writing a quick and dirty script to do it for them)? More information So right now you can inflate your view count with the following few lines of Python code. Which is so little that you don't even really need to write a script, you could just type it into an interactive session: from urllib import urlopen num_of_times_to_hit_page = 100 url_of_the_page = "http://example.com" for x in range(num_of_times_to_hit_page): urlopen(url_of_the_page) Solution I'll probably use To me, it's a pretty rough situation when you need to do a bunch of writes to the database on EVERY page view, but I guess it can't be helped. I'm going to implement IP logging due to several users artificially inflating their view count. It's not that they're bad people or even bad users. See the answer about solving the problem with caching... I'm going to pursue that route first. Will update with results. For what it's worth, it seems Stack Overflow is using cookies (I can't increment my own view count, but it increased when I visited the site in another browser.) I think that the benefit is just too much, and this sort of 'cheating' is just too easy right now. Thanks for the help everyone!

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• R: dev.copy2pdf, multiple graphic devices to a single file, how to append to file?

  - by Timtico

  Hi everybody, I have a script that makes barplots, and opens a new window when 6 barplots have been written to the screen and keeps opening new graphic devices whenever necessary. Depending on the input, this leaves me with a potential large number of openened windows (graphic devices) which I would like to write to a single PDF file. Considering my Perl background, I decided to iterate over the different graphics devices, printing them out one by one. I would like to keep appending to a single PDF file, but I do not know how to do this, or if this is even possible. I would like to avoid looping in R. :) The code I use: for (i in 1:length(dev.list()) { dev.set(which = dev.list()[i] dev.copy2pdf(device = quartz, file = "/Users/Tim/Desktop/R/Filename.pdf") } However, this is not working as it will overwrite the file each time. Now is there an append function in R, like there is in Perl. Which allows me to keep adding pages to the existing pdf file? Or is there a way to contain the information in a graphic window to a object, and keep adding new graphic devices to this object and finally print the whole thing to a file? Other possible solutions I thought about: writing different pdf files, combining them after creation (perhaps even possible in R, with the right libraries installed?) copying the information in all different windows to one big graphic device and then print this to a pdf file.

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