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  • UIViewAnimationTransitionCurlUp in landscape mode transitioning right-to-left

    - by Thanos
    I have a view controller that is showing in portrait mode. When you touch the "menu" button, it calls the code below and it flips up to the MainMenu controller. So far, so good. - (void) menuButton: (id) sender { MainMenu_ViewController * viewController = [[MainMenu_ViewController alloc] initWithNibName:@"MainMenu_ViewController" bundle:nil]; self.menuView = viewController.view; self.menuView.frame = self.view.bounds; [viewController release]; [UIView beginAnimations:nil context: nil]; [UIView setAnimationDuration: 1.0]; [UIView setAnimationTransition: UIViewAnimationTransitionCurlUp forView: self.view cache: YES]; [self.view addSubview: self.menuView]; [UIView commitAnimations]; } However, when you do the same in landscape mode, instead of the animation flipping up (with respect to gravity, i.e. towards the long end of the iPhone) it flips towards the left (i.e. towards the short end of the iPhone). Is this a limitation of the animation, or am I missing something?

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  • Android WebView - cannot understand - Null or empty value for header "if-none-match"

    - by ganesh
    Hi When i tried to load a url i get an exception as below Uncaught handler: thread WebViewCoreThread exiting due to uncaught exception 06-16 10:22:31.471: ERROR/AndroidRuntime(635): java.lang.RuntimeException: Null or empty value for header "if-none-match" 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.net.http.Request.addHeader(Request.java:161) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.net.http.Request.addHeaders(Request.java:179) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.net.http.Request.<init>(Request.java:132) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.net.http.RequestQueue.queueRequest(RequestQueue.java:480) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.net.http.RequestHandle.createAndQueueNewRequest(RequestHandle.java:419) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.net.http.RequestHandle.setupRedirect(RequestHandle.java:195) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.webkit.LoadListener.doRedirect(LoadListener.java:1216) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.webkit.LoadListener.handleMessage(LoadListener.java:220) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.os.Handler.dispatchMessage(Handler.java:99) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.os.Looper.loop(Looper.java:123) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at android.webkit.WebViewCore$WebCoreThread.run(WebViewCore.java:471) 06-16 10:22:31.471: ERROR/AndroidRuntime(635): at java.lang.Thread.run(Thread.java:1060) the code i am using is webview = (WebView)findViewById(R.id.generalwebview); webview.getSettings().setJavaScriptEnabled(true); webview.setWebViewClient(new WebViewClient() { public boolean shouldOverrideUrlLoading(WebView view, String url) { Log.i("ReserveBooking", "Processing webview url click..."); view.loadUrl(url); return true; } public void onPageFinished(WebView view, String url) { Log.i("ReserveBooking", "Finished loading URL: " +url); } public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) { Log.e("ReserveBooking", "Error: " + description); Toast.makeText(ReserveBooking.this, description, Toast.LENGTH_SHORT).show(); } }); webview.loadUrl(utls); and when i changed the emulator, this programs works without any error .Please help me to know the reason why i get this error ,is this error somehow related to cache? ,I shall be glad if someone explains ganesh

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  • Why is my jQuery jEditable, edit-in-place callback not working?

    - by unknowndomain
    I am using a jQuery jEditable edit-in-place field but when the JSON function returns and I try to return a value from my edit-in-place callback all I get is a flash of You can see this here... http://clareshilland.unknowndomain.co.uk/ Hit Ctrl+L to login... Username: stackoverflow Password: jquery Although you can see the script in /script.js here is the main code exerpt... $('#menu li a').editable(edit_menu_item, { cssclass: 'editable' }); Here is the callback: function edit_menu_item(value, settings) { $.ajax({ type : "POST", cache : false, url : 'ajax/menu/edit-category.php', dataType: 'json', data : { 'id': this.id, 'value': value }, success : function(data) { if (data.status == 'ok') { alert('ok'); return data.title; } else { alert('n/ok'); return this.revert; } }}); } The JSON code is here: ajax/menu.edit-category.php The edit-in-place is is on the menu which also has a jQuery sortable on it. Single click to edit. Enter to save, and it stores the data but does not update it on the edit-in-place field. Please help stackoverflow, I have been working on this for a mega age. Thanks in advance!

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  • Get Classic ASP variable from posted JSON

    - by Will
    I'm trying to post JSON via AJAX to a Classic ASP page, which retrieves the value, checks a database and returns JSON to the original page. I can post JSON via AJAX I can return JSON from ASP I can't retrieve the posted JSON into an ASP variable POST you use Request.Form, GET you use Request.Querystring......... what do I use for JSON? I have JSON libraries but they only show creating a string in the ASP script and then parsing that. I need to parse JSON from when being passed an external variable. Javascipt var thing = $(this).val(); $.ajax({ type: "POST", url: '/ajax/check_username.asp', data: "{'userName':'" + thing + "'}", contentType: "application/json; charset=utf-8", dataType: "json", cache: false, async: false, success: function() { alert('success'); }); ASP file (check_username.asp) Response.ContentType = "application/json" sEmail = request.form() -- THE PROBLEM Set oRS = Server.CreateObject("ADODB.Recordset") SQL = "SELECT SYSUserID FROM dbo.t_SYS_User WHERE Username='"&sEmail&"'" oRS.Open SQL, oConn if not oRS.EOF then sStatus = (new JSON).toJSON("username", true, false) else sStatus = (new JSON).toJSON("username", false, false) end if response.write sStatus

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  • .NET Reference "Copy Local" True / False Being Set Based on Contents of GAC

    - by D-Sect
    We had a very interesting problem with a Win Forms project. It's been resolved. We know what happened, but we want to understand why it happened. This may help other people out in the future who have a similar problem. The WinForms project failed on 2 of our client's PCs. The error was an obscure kernel.dll error. The project ran fine on 3 other PCs. We found that a .DLL (log4net.dll - a very popular open-source logging library) was missing from our release folder. It was previously in our release folder. Why was it missing in this latest release? It was missing because I must have installed a program on my Dev box that used log4net.dll and it was added to the Global Assembly Cache. When I checked the solution's references for log4net.dll, they were changed to "copy local=FALSE". They must have changed automatically because log4net.dll was present in my GAC. Here's where my question starts: Why did my reference for log4net.dll get changed from COPY LOCAL = TRUE to COPY LOCAL = FALSE? I suspect it's because it was added to my GAC by another program. How can we prevent this from happening again? As it stands now, if I install a piece of software that uses a common library and it adds it to my GAC, then my SLNs that reference that DLL will change from Copy Local TRUE to FALSE.

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  • How to Compile Mod_Python 3.3.1 for Python 2.6 and Apache 2.2 on Windows?

    - by John
    I have no experience compiling code other than using Visual Studio's Build command. I am hoping we can create a step by step guide for compiling mod_python on windows. Please be as descriptive as possible. This is what I've done so far: Download and install python 2.6.2 Download and install apache 2.2.11 Download the most recent source code for mod_python from svn From here I'm lost to what the next step is. I've downloaded Microsoft Visual C++ 2008 Express Edition. As mentioned by Hao I've already tried the tutorial mentioned in that link. Here is the error messages I'm receiving with that tutorial. C:\mod_python\distbuild_installer.bat Could Not Find C:\mod_python\src*.obj running bdist_wininst running build running build_py creating build creating build\lib.win32-2.6 creating build\lib.win32-2.6\mod_python copying C:\mod_python\lib\python\mod_python\apache.py - build\lib.win32-2.6\mod _python copying C:\mod_python\lib\python\mod_python\cache.py - build\lib.win32-2.6\mod_ python copying C:\mod_python\lib\python\mod_python\cgihandler.py - build\lib.win32-2.6 \mod_python copying C:\mod_python\lib\python\mod_python\Cookie.py - build\lib.win32-2.6\mod _python copying C:\mod_python\lib\python\mod_python\importer.py - build\lib.win32-2.6\m od_python copying C:\mod_python\lib\python\mod_python\psp.py - build\lib.win32-2.6\mod_py thon copying C:\mod_python\lib\python\mod_python\publisher.py - build\lib.win32-2.6\ mod_python copying C:\mod_python\lib\python\mod_python\python22.py - build\lib.win32-2.6\m od_python copying C:\mod_python\lib\python\mod_python\Session.py - build\lib.win32-2.6\mo d_python copying C:\mod_python\lib\python\mod_python\testhandler.py - build\lib.win32-2. 6\mod_python copying C:\mod_python\lib\python\mod_python\util.py - build\lib.win32-2.6\mod_p ython copying C:\mod_python\lib\python\mod_python__init__.py - build\lib.win32-2.6\m od_python running build_ext building 'mod_python_so' extension creating build\temp.win32-2.6 creating build\temp.win32-2.6\Release creating build\temp.win32-2.6\Release\mod_python creating build\temp.win32-2.6\Release\mod_python\src C:\Program Files\Microsoft Visual Studio 9.0\VC\BIN\cl.exe /c /nologo /Ox /MD /W 3 /GS- /DNDEBUG -DWIN32 -DNDEBUG -D_WINDOWS -IC:\mod_python\src\include -Ic:\apa che\include -IC:\Python26\include -IC:\Python26\PC /TcC:\mod_python\src\mod_pyth on.c /Fobuild\temp.win32-2.6\Release\mod_python\src\mod_python.obj mod_python.c c:\apache\include\ap_config.h(25) : fatal error C1083: Cannot open include file: 'apr.h': No such file or directory error: command '"C:\Program Files\Microsoft Visual Studio 9.0\VC\BIN\cl.exe"' fa iled with exit status 2

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  • LINQ-to-SQL: ExecuteQuery(Type, String) populates one field, but not the other

    - by Daniel Schaffer
    I've written an app that I use as an agent to query data from a database and automatically load it into my distributed web cache. I do this by specifying an sql query and a type in a configuration. The code that actually does the querying looks like this: List<Object> result = null; try { result = dc.ExecuteQuery(elementType, entry.Command).OfType<Object>().ToList(); } catch (Exception ex) { HandleException(ex, WebCacheAgentLogEvent.DatabaseExecutionError); continue; } elementType is a System.Type created from the type specified in the configuration (using Type.GetType()), and entry.Command is the SQL query. The specific entity type I'm having an issue with looks like this: public class FooCount { [Column(Name = "foo_id")] public Int32 FooId { get; set; } [Column(Name = "count")] public Int32 Count { get; set; } } The SQL query looks like this: select foo_id as foo_id, sum(count) as [count] from foo_aggregates group by foo_id order by foo_id For some reason, when the query is executed, the "Count" property ends up populated, but not the "FooId" property. I tried running the query myself, and the correct column names are returned, and the column names match up with what I've specified in my mapping attributes. Help!

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  • Preventing Flex application caching in browser (multiple modules)

    - by Simon_Weaver
    I have a Flex application with multiple modules. When I redeploy the application I was finding that modules (which are deployed as separate swf files) were being cached in the browser and the new versions weren't being loaded. So i tried the age old trick of adding ?version=xxx to all the modules when they are loaded. The value xxx is a global parameter which is actually stored in the host html page: var moduleSection:ModuleLoaderSection; moduleSection = new ModuleLoaderSection(); moduleSection.visible = false; moduleSection.moduleName = moduleName + "?version=" + MySite.masterVersion; In addition I needed to add ?version=xxx to the main .swf that was being loaded. Since this is done by HTML I had to do this by modifying my AC_OETags.js file as below : function AC_FL_RunContent(){ var ret = AC_GetArgs ( arguments, ".swf?mv=" + getMasterVersion(), "movie", "clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" , "application/x-shockwave-flash" ); AC_Generateobj(ret.objAttrs, ret.params, ret.embedAttrs); } This is all fine and works great. I just have a hard time believing that Adobe doesn't already have a way to handle this. Given that Flex is being targeted to design modular applications for business I find it especially surprising. What do other people do? I need to make sure my application reloads correctly even if someone has once per session selected for their 'browser cache checking policy'.

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  • WPF - Dynamic tooltip

    - by Al Mackenzie
    I have a class ToolTipProvider which has a method string GetToolTip(UIElement element) which will return a specific tooltip for the UIElement specified, based on various factors including properties of the UIElement itself and also looking up into documentation which can be changed dynamically. It will also probably run in a thread so when the form first fires up the tooltips will be something like the visual studio 'Document cache is still being constructed', then populated in the background. I want to allow this to be used in any wpf form with the minimum effort for the developer. Essentially I want to insert an ObjectDataProvider resource into the Window.Resources to wrap my ToolTipProvider object, then I think I need to create a tooltip (called e.g. MyToolTipProvider) in the resources which references that ObjectDataProvider, then on any element which requires this tooltip functionality it would just be a case of ToolTip="{StaticResource MyToolTipProvider}" however I can't work out a) how to bind the actual elemnt itself to the MethodParameters of the objectdataprovider, or b) how to force it to call the method each time the tooltip is opened. Any ideas/pointers on the general pattern I need? Not looking for complete solution, just any ideas from those more experienced

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  • jQuery datepicker returns "inst is null" error when loaded via AJAX

    - by Robert
    I'm loading content via an AJAX call into a table row added to the DOM on the fly. I'm calling the datepicker functionality in my callback function and the calendar shows fine. However, when I click on the date, I get an error: inst is null. Here's my code: $(document).ready(function() { $(".edit").live("click", function() { //Delete previously loaded edit row $("#tempEditRow").remove(); //Get the record id of the row to be edited var recordID = $(this).parent("td").parent("tr").attr("id"); //Add the new row to the document $(this).parent("td").parent("tr").after("<tr id=\"tempEditRow\"><td id=\"tempEditCell\" colspan=\"100\"></td></tr>") //Get a reference to the new row var container = $("#tempEditCell"); //Populate the container populateContainer("/wpm/includes/ajax_editApplication.cfm?id=" + recordID, container); }); }); function populateContainer(ajaxUrl, container) { //Populate the container $.ajax({ url: ajaxUrl, cache: false, success: function(html){ $(container).html(html); $('.datepicker').datepicker(); } }); } I've tried deleting the hasDatepicker class, deleting any references to the datepicker, etc. but nothing is working. Thanks in advance for helping!

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  • How to parse a raw HTTP response?

    - by Ed
    If I have a raw HTTP response as a string: HTTP/1.1 200 OK Date: Tue, 11 May 2010 07:28:30 GMT Expires: -1 Cache-Control: private, max-age=0 Content-Type: text/html; charset=UTF-8 Server: gws X-XSS-Protection: 1; mode=block Connection: close <!doctype html><html>...</html> Is there an easy way I can parse it into an HttpListenerResponse object? Or at least some kind .NET object so I don't have to work with raw responses. What I'm doing currently is extracting the header key/value pairs and setting them on the HttpListenerResponse. But some headers can't be set, and then I have to cut out the body of the response and write it to the OutputStream. But the body could be gzipped, or it could be an image, which I can't get to work yet. And some responses contain random characters everywhere, which looks like an encoding problem. It's a lot of trouble. I'm getting a raw response because I'm using SOCKS to send an HTTP request. The program I'm working on is basically an HTTP proxy that can route requests through a SOCKS proxy, like Privoxy does.

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  • empty response body in ajax (or 206 Partial Content)

    - by Nikita Rybak
    Hi guys, I'm feeling completely stupid because I've spent two hours solving task which should be very simple and which I solved many times before. But now I'm not even sure in which direction to dig. I fail to fetch static content using ajax from local servers (Apache and Mongrel). I get responses 200 and 206 (depending on the server), empty response text (although Content-Length header is always correct), firebug shows request in red. Javascript is very generic, I'm getting same results even here: http://www.w3schools.com/ajax/tryit.asp?filename=tryajax_first (just change document location to 'http://localhost:3000/whatever') So, it's probably not the cause. Well, now I'm out of ideas. I can also post http headers, if it'll help. Thanks! Response Headers Connection close Date Sat, 01 May 2010 21:05:23 GMT Last-Modified Sun, 18 Apr 2010 19:33:26 GMT Content-Type text/html Content-Length 7466 Request Headers Host localhost:3000 User-Agent Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language en-us,en;q=0.5 Accept-Encoding gzip,deflate Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive 115 Connection keep-alive Referer http://www.w3schools.com/ajax/tryit_view.asp Origin http://www.w3schools.com Response Headers Date Sat, 01 May 2010 21:54:59 GMT Server Apache/2.2.14 (Unix) mod_ssl/2.2.14 OpenSSL/0.9.8l DAV/2 mod_jk/1.2.28 Etag "3d5cbdb-fb4-4819c460d4a40" Accept-Ranges bytes Content-Length 4020 Cache-Control max-age=7200, public, proxy-revalidate Expires Sat, 01 May 2010 23:54:59 GMT Content-Range bytes 0-4019/4020 Keep-Alive timeout=5, max=100 Connection Keep-Alive Content-Type application/javascript Request Headers Host localhost User-Agent Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language en-us,en;q=0.5 Accept-Encoding gzip,deflate Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive 115 Connection keep-alive Origin null

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  • asp.net mvc custom membership provider - define application

    - by ile
    I created custom membership provider for asp.net mvc applications and it all works fine except one thing: when logged in to my application, I am also logged in to all other asp.net mvc applications that I run using Visual Studio. I suppose this data is being pulled from cache because when I logout and try to login again in other application, I'm being rejected. In webconfig, I added applicationName in order to solve this but it didn't work: <membership defaultProvider="SAMembershipProvider" userIsOnlineTimeWindow="15"> <providers> <clear/> <add name="SAMembershipProvider" type="ShinyAnt.Membership.SAMembershipProvider, ShinyAnt" connectionStringName ="ShinyAntConnectionString" applicationName="MyApp" /> </providers> </membership> <roleManager defaultProvider="SARoleProvider" enabled="true" cacheRolesInCookie="true"> <providers> <clear/> <add name="SARoleProvider" type="ShinyAnt.Membership.SARoleProvider" connectionStringName ="ShinyAntConnectionString" applicationName="MyApp" /> </providers> </roleManager> Is there any method that I forgot to implement that is dealing with this problem or it is something else?

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  • Response.TransmitFile problem

    - by geoff
    I have the following code delivering a file to users when they click on a download link. For security purposes I can't just link directly to the file so this was set up to decode the url and transmit the file. It has been working fine for a while but recently I started having problems where the file will start downloading but there's no indication of how large the file is. Because of this when the download should stop, it doesn't. The file is about 99mb but when I download it, the browser just keeps downloading way beyond 100mb. I don't know what it's downloading but if I don't cancel it, it doesn't stop. So, my question is, is there either an alternative to transmitfile or a way to make sure the size of the file is sent also so that it stops at the right time? I don't want to use writefile because I don't want to load the entire file into memory since it's so large. Thanks. Here is the code: string filename = Path.GetFileName(url); context.Response.Buffer = true; context.Response.Charset = ""; context.Response.Cache.SetCacheability(HttpCacheability.NoCache); context.Response.ContentType = "application/x-rar-compressed"; context.Response.AddHeader("content-disposition", "attachment;filename=" + filename); context.Response.TransmitFile(context.Server.MapPath(url)); context.Response.Flush();

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  • Wix Burn issue: Uninstall fails saying "Found dependent"

    - by vivek chaurasiya
    I have made a burn bundle which encapsulates 2 msi (msi1 , msi2) . In the UI I use checkboxes to ask the user to select which MSI to install. Now if user selects one of the msi to install, installation goes fine. But during Uninstall action, the burn log file says : [][:15]: Detected package: Netfx4Full, state: Present, cached: None [][:15]: Detected package: DummyInstallationPackageId3, state: **Absent**, cached: None [][:15]: Detected package: msi2.msi, state: **Present**, cached: Complete [][:15]: Detect complete, result: 0x0 [][:16]: Plan 3 packages, action: Uninstall [][:16]: Will not uninstall package: msi2.msi, found dependents: 1 [][:16]: Found dependent: {08e74372-83f2-4594-833b-e924b418b360}, name: My Test Application In the install scenario, I chose to install msi2 and NOT msi1. My bundle code looks like: <Bundle Name="My Test Application" Version="1.0.0.0" Manufacturer="Bryan" UpgradeCode="CC2A383C-751A-43B8-90BF-A250F7BC2863"> <Chain> <PackageGroupRef Id='Netfx4Full' /> <MsiPackage Id="DummyInstallationPackageId3" SourceFile="msi1.msi" ForcePerMachine="yes" InstallCondition="var1 = 1" > </MsiPackage> <MsiPackage SourceFile="msi2.msi" Vital="yes" Cache="yes" Visible="no" ForcePerMachine="yes" InstallCondition="var2 = 2" > </MsiPackage> </Chain> My OnDetectPackageComplete() looks like: private void OnDetectPackageComplete(object sender, DetectPackageCompleteEventArgs e) { if (e.PackageId == "DummyInstallationPackageId3" ) { if (e.State == PackageState.Absent) InstallEnabled = true; else if (e.State == PackageState.Present) UninstallEnabled = true; } } What should I do so that the burn bundle is freely able to uninstall the msi which the user selected at the time of install. Besides, If I select both msi to install, then uninstall is working fine. IMO, there is some problem b/w the relation of bundle and the 2 msi. Please help me as I am stuck with this problem.

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  • Async Load JavaScript Files with Callback

    - by Gcoop
    Hi All, I am trying to write an ultra simple solution to load a bunch of JS files asynchronously. I have the following script below so far. However the callback is sometimes called when the scripts aren't actually loaded which causes a variable not found error. If I refresh the page sometimes it just works because I guess the files are coming straight from the cache and thus are there quicker than the callback is called, it's very strange? var Loader = function () { } Loader.prototype = { require: function (scripts, callback) { this.loadCount = 0; this.totalRequired = scripts.length; this.callback = callback; for (var i = 0; i < scripts.length; i++) { this.writeScript(scripts[i]); } }, loaded: function (evt) { this.loadCount++; if (this.loadCount == this.totalRequired && typeof this.callback == 'function') this.callback.call(); }, writeScript: function (src) { var self = this; var s = document.createElement('script'); s.type = "text/javascript"; s.async = true; s.src = src; s.addEventListener('load', function (e) { self.loaded(e); }, false); var head = document.getElementsByTagName('head')[0]; head.appendChild(s); } } Is there anyway to test that a JS file is completely loaded, without putting something in the actual JS file it's self, because I would like to use the same pattern to load libraries out of my control (GMaps etc). Invoking code, just before the tag. var l = new Loader(); l.require([ "ext2.js", "ext1.js"], function() { var config = new MSW.Config(); Refraction.Application().run(MSW.ViewMapper, config); console.log('All Scripts Loaded'); }); Thanks for any help.

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  • Can you use gzip over SSL? And Connection: Keep-Alive headers

    - by magenta
    I'm evaluating the front end performance of a secure (SSL) web app here at work and I'm wondering if it's possible to compress text files (html/css/javascript) over SSL. I've done some googling around but haven't found anything specifically related to SSL. If it's possible, is it even worth the extra CPU cycles since responses are also being encrypted? Would compressing responses hurt performance? Also, I'm wanting to make sure we're keeping the SSL connection alive so we're not making SSL handshakes over and over. I'm not seeing Connection: Keep-Alive in the response headers. I do see Keep-Alive: 115 in the request headers but that's only keeping the connection alive for 115 milliseconds (seems like the app server is closing the connection after a single request is processed?) Wouldn't you want the server to be setting that response header for as long as the session inactivity timeout is? I understand browsers don't cache SSL content to disk so we're serving the same files over and over and over on subsequent visits even though nothing has changed. The main optimization recommendations are reducing the number of http requests, minification, moving scripts to bottom, image optimization, possible domain sharding (though need to weigh the cost of another SSL handshake), things of that nature.

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  • ProgrammingError when aggregating over an annotated & grouped Django ORM query

    - by ento
    I'm trying to construct a query to get the "average, maximum, minimum number of items purchased by a single user". The data source is this simple sales record table: class SalesRecord(models.Model): id = models.IntegerField(primary_key=True) user_id = models.IntegerField() product_code = models.CharField() price = models.IntegerField() created_at = models.DateTimeField() A new record is inserted into this table for every item purchased by a user. Here's my attempt at building the query: q = SalesRecord.objects.all() q = q.values('user_id').annotate( # group by user and count the # of records count=Count('id'), # (= # of items) ).order_by() result = q.aggregate(Max('count'), Min('count'), Avg('count')) When I try to execute the code, a ProgrammingError is raised at the last line: (1064, "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FROM (SELECT sales_records.user_id AS user_id, COUNT(sales_records.`' at line 1") Django's error screen shows that the SQL is SELECT FROM (SELECT `sales_records`.`player_id` AS `player_id`, COUNT(`sales_records`.`id`) AS `count` FROM `sales_records` WHERE (`sales_records`.`created_at` >= %s AND `sales_records`.`created_at` <= %s ) GROUP BY `sales_records`.`player_id` ORDER BY NULL) subquery It's not selecting anything! Can someone please show me the right way to do this? Hacking Django I've found that clearing the cache of selected fields in django.db.models.sql.BaseQuery.get_aggregation() seems to solve the problem. Though I'm not really sure this is a fix or a workaround. @@ -327,10 +327,13 @@ # Remove any aggregates marked for reduction from the subquery # and move them to the outer AggregateQuery. + self._aggregate_select_cache = None + self.aggregate_select_mask = None for alias, aggregate in self.aggregate_select.items(): if aggregate.is_summary: query.aggregate_select[alias] = aggregate - del obj.aggregate_select[alias] + if alias in obj.aggregate_select: + del obj.aggregate_select[alias] ... yields result: {'count__max': 267, 'count__avg': 26.2563, 'count__min': 1}

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  • cakephp paginate using mysql SQL_CALC_FOUND_ROWS

    - by michael
    I'm trying to make Cakephp paginate take advantage of the SQL_CALC_FOUND_ROWS feature in mysql to return a count of total rows while using LIMIT. Hopefully, this can eliminate the double query of paginateCount(), then paginate(). http://dev.mysql.com/doc/refman/5.0/en/information-functions.html#function_found-rows I've put this in my app_model.php, and it basically works, but it could be done better. Can someone help me figure out how to override paginate/paginateCount so it executes only 1 SQL stmt? /** * Overridden paginateCount method, to using SQL_CALC_FOUND_ROWS */ public function paginateCount($conditions = null, $recursive = 0, $extra = array()) { $options = array_merge(compact('conditions', 'recursive'), $extra); $options['fields'] = "SQL_CALC_FOUND_ROWS `{$this->alias}`.*"; Q: how do you get the SAME limit value used in paginate()? $options['limit'] = 1; // ideally, should return same rows as in paginate() Q: can we somehow get the query results to paginate directly, without the extra query? $cache_results_from_paginateCount = $this->find('all', $options); /* * note: we must run the query to get the count, but it will be cached for multiple paginates, so add comment to query */ $found_rows = $this->query("/* do not cache for {$this->alias} */ SELECT FOUND_ROWS();"); $count = array_shift($found_rows[0][0]); return $count; } /** * Overridden paginate method */ public function paginate($conditions, $fields, $order, $limit, $page = 1, $recursive = null, $extra = array()) { $options = array_merge(compact('conditions', 'fields', 'order', 'limit', 'page', 'recursive'), $extra); Q: can we somehow get $cache_results_for_paginate directly from paginateCount()? return $cache_results_from_paginateCount; // paginate in only 1 SQL stmt return $this->find('all', $options); // ideally, we could skip this call entirely }

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  • Working with a large data object between ruby processes

    - by Gdeglin
    I have a Ruby hash that reaches approximately 10 megabytes if written to a file using Marshal.dump. After gzip compression it is approximately 500 kilobytes. Iterating through and altering this hash is very fast in ruby (fractions of a millisecond). Even copying it is extremely fast. The problem is that I need to share the data in this hash between Ruby on Rails processes. In order to do this using the Rails cache (file_store or memcached) I need to Marshal.dump the file first, however this incurs a 1000 millisecond delay when serializing the file and a 400 millisecond delay when serializing it. Ideally I would want to be able to save and load this hash from each process in under 100 milliseconds. One idea is to spawn a new Ruby process to hold this hash that provides an API to the other processes to modify or process the data within it, but I want to avoid doing this unless I'm certain that there are no other ways to share this object quickly. Is there a way I can more directly share this hash between processes without needing to serialize or deserialize it? Here is the code I'm using to generate a hash similar to the one I'm working with: @a = [] 0.upto(500) do |r| @a[r] = [] 0.upto(10_000) do |c| if rand(10) == 0 @a[r][c] = 1 # 10% chance of being 1 else @a[r][c] = 0 end end end @c = Marshal.dump(@a) # 1000 milliseconds Marshal.load(@c) # 400 milliseconds Update: Since my original question did not receive many responses, I'm assuming there's no solution as easy as I would have hoped. Presently I'm considering two options: Create a Sinatra application to store this hash with an API to modify/access it. Create a C application to do the same as #1, but a lot faster. The scope of my problem has increased such that the hash may be larger than my original example. So #2 may be necessary. But I have no idea where to start in terms of writing a C application that exposes an appropriate API. A good walkthrough through how best to implement #1 or #2 may receive best answer credit.

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  • Confusion about maven-war-plugin and jetty-maven-plugin

    - by waxwing
    I am trying to get the run-exploded goal of the jetty-maven-plugin to work correctly. I find the documentation somewhat lacking on what I need to do to set this up. I believe I have a standard WAR-file setup. (The reason I wrote "believe" is that I find the maven-war-plugin documentation lacking as well.) When I build my webapp using maven package, I get the following in my target folder: classes maven-archiver surefire-reports test-classes tmp mywebapp-version mywebapp-version.war where mywebapp-version is the exploded war and mywebapp-version.war is the packaged one. So far so good (I think?). Now, running mvn jetty:run-exploded, it seems the default deploy folder is target/tmp/webapp/mywebapp-version.war/. This folder exists, but contains no files except for a webapp-cache.xml. This seems wrong to me. I also tried to actively set the webApp configuration element to ${project.build.directory}/mywebapp-version/, but run-exploded seems to ignore it (despite the documentation stating otherwise). What am I doing wrong? It looks as if I am missing something simple since no one else appears to be running into the same problem.

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  • JVM CMS Garbage Collecting Issues

    - by jlintz
    I'm seeing the following symptoms on an application's GC log file with the Concurrent Mark-Sweep collector: 4031.248: [CMS-concurrent-preclean-start] 4031.250: [CMS-concurrent-preclean: 0.002/0.002 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 4031.250: [CMS-concurrent-abortable-preclean-start] CMS: abort preclean due to time 4036.346: [CMS-concurrent-abortable-preclean: 0.159/5.096 secs] [Times: user=0.00 sys=0.01, real=5.09 secs] 4036.346: [GC[YG occupancy: 55964 K (118016 K)]4036.347: [Rescan (parallel) , 0.0641200 secs]4036.411: [weak refs processing, 0.0001300 secs]4036.411: [class unloading, 0.0041590 secs]4036.415: [scrub symbol & string tables, 0.0053220 secs] [1 CMS-remark: 16015K(393216K)] 71979K(511232K), 0.0746640 secs] [Times: user=0.08 sys=0.00, real=0.08 secs] The preclean process keeps aborting continously. I've tried adjusting CMSMaxAbortablePrecleanTime to 15 seconds, from the default of 5, but that has not helped. The current JVM options are as follows... Djava.awt.headless=true -Xms512m -Xmx512m -Xmn128m -XX:MaxPermSize=128m -XX:+HeapDumpOnOutOfMemoryError -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:BiasedLockingStartupDelay=0 -XX:+DoEscapeAnalysis -XX:+UseBiasedLocking -XX:+EliminateLocks -XX:+CMSParallelRemarkEnabled -verbose:gc -XX:+PrintGCTimeStamps -XX:+PrintGCDetails -XX:+PrintHeapAtGC -Xloggc:gc.log -XX:+CMSClassUnloadingEnabled -XX:+CMSPermGenPrecleaningEnabled -XX:CMSInitiatingOccupancyFraction=50 -XX:ReservedCodeCacheSize=64m -Dnetworkaddress.cache.ttl=30 -Xss128k It appears the concurrent-abortable-preclean never gets a chance to run. I read through http://blogs.sun.com/jonthecollector/entry/did_you_know which had a suggestion of enabling CMSScavengeBeforeRemark, but the side effects of pausing did not seem ideal. Could anyone offer up any suggestions? Also I was wondering if anyone had a good reference for grokking the CMS GC logs, in particular this line: [1 CMS-remark: 16015K(393216K)] 71979K(511232K), 0.0746640 secs] Not clear on what memory regions those numbers are referring to.

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  • Custom HTTPHandler causing caching or session issues?

    - by Jan de Jager
    So i have a custom CMS running under .Net 3.5 written entirely in c#. The engine is optimized to render for mobile devices, but also server to normal web browsers. It also supports cookieless sessions. Great... I've chosen not to cache anything (including browser data) in order to control the rendering completely from data. This has been all good until lately. The engine implements a basic login function that simply logs the user state within a session object. The behavior is rather strange. User will click through the site no problem. Then login. The login will either go through successfully or just redisplay the login screen, suggesting a cached page being returned or redisplayed... If the login is successful the concurrent page hits will switch arbitrarily between logged in and logged out state... Also suggesting either the session state is not accessible or a cached page being returned. I have debugged the hell out of the thing.... including using fiddler and the like. When debugging the behavior disappears. Huh? One of the sites running on the engine is http://www.wiseguy.mobi (sorry customized for South Africa, so you'll probably not be able to get the password Text Message)!

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  • Flex: How to refresh/repaint a chart?

    - by Rob
    I have a chart for which the data is provided asynchronously via a CallResponder (used with a RemoteObject). However, it does not seem possible to update the chart with the data after it has been initially drawn. Here are the relevant snippets of (simplified) code: // code below is in the application MXML <mx:CallResponder id="result" result="resultHandler(event)" /> private function resultHandler(event:ResultEvent):void { // panel is an instance of ChartPanel this.panel.init(event.result); } // invoked when user clicks a button private function displayChart():void { this.currentState = "ShowChart"; result.token = remoteObject.getUrlStatistics(); } // code below is in ChartPanel <mx:BarChart id="chart" /> public function init(value:Object):void { var xml:XMLList = XMLList(value); var data:ArrayCollection = new ArrayCollection(); for each (var element:XML in xml.children()) { // not shown: extract value out of XML, put in ArrayList data.addItem(...); } this.chart.dataProvider = data; } The result is that it draws an empty chart. the resultHandler function or init function in ChartPanel needs to trigger a repaint or something similar. I have tried: Firing a collection modified event after assigning it to chart.dataProvider calling invalidateDisplayList (tried with all components) binding the chart data provider to a variable, and doing the above. changing the view state on the last line of resultHandler. None of them worked. When I fetch the data and cache it locally, then use it to call init synchronously, the chart displays correctly. What am I missing here?

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  • IPhone SDK - Transition to NavigationController display problem

    - by Steblo
    Hi, I am nearly finished with my first IPhone app and everything works fine - except of one very little display bug: My starscreen is an UIView (Fullscreen) without Navigationbar or Toolbar. If I tap on a start button, there is an UIViewAnimationTransitionFlipFromRight animation that flips to the main navigation controller: -(IBAction) switchViewToMainMenu { [UIView beginAnimations:@"Flip View" context:nil]; [UIView setAnimationDuration:1.25]; [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut]; [UIView setAnimationTransition: UIViewAnimationTransitionFlipFromRight forView:self.window cache:YES]; [self.navController viewWillAppear:YES]; [self.startScreenViewController viewWillDisappear:YES]; [self.startScreenViewController.view removeFromSuperview]; [self.window addSubview:navController.view]; [self.startScreenViewController viewDidDisappear:YES]; [self.navController viewDidAppear:YES]; [UIView commitAnimations]; self.startScreenViewController=nil; [startScreenViewController release]; } This works fine except of one little problem: When the navigation controller view appears (flips in), the Navigationbar on top is some pixels too high (the is a white bar where the Navigationbar should be). When the animation finished, the Navigationbar drops down to the right position. This doesn't look very beautiful... Any ideas how to fix that problem ?

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