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Search found 21116 results on 845 pages for 'image caching'.

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  • Rails :Is this caching problem

    - by Ankit
    Hi, I'm new to rails, and have taken some existing site for new enhancements. I mirrored rails application from remote server, and running locally using "ruby script/server" server. The problem is any changes to the files are not being reflected in web browser. Is this because of caching somehwere. Can someone pls point me where should Ilook to disable this or come back to development env?

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  • Are there algorithms for increasing resolution of an image?

    - by David
    Are there any algorithms or tools that can increase the resolution of an image - besides just a simple zoom that makes each individual pixel in the image a little larger? I realize that such an algorithm would have to invent pixels that don't really exist in the original image, but I figured there might be some algorithm that could intelligently figure out what pixels to add to the image to increase its resolution.

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  • asp.net-mvc: javascript caching

    - by Omu
    I'm thinking whether it makes sense in order to increase the speed of the website to do some strategy of caching the js files that are being included ? one idea that I have is to do something like this: [OutputCache(Location = OutputCacheLocation.Any, Duration = 3600)] public JsController : Controller public ActionResult JQuery() { //I would have a ascx with the entire jquery script inside return View(); } and on the site.master: <%=Html.RenderAction("JQuery","JsController");

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  • knife azure image list doesn't return User image

    - by TooLSHeD
    I'm trying to create and bootstrap a Windows VM in Azure using knife-azure. I initially tried using a Public Win 2008 r2 image, but quickly found out that winrm needs to be configured before this can work. So, I created a VM from that image, configured winrm as per these instructions and captured the VM. The problem is that the image does not show up when executing knife azure image list. When I try creating the server with the image name from the Azure portal, it complains that it does not exist. I'm running Ubuntu, so I tried the Azure cli tools and it doesn't show there either. I installed Azure PS in a Win 8 VM and then it shows up. Feeling encouraged, I installed Chef and knife-azure in the Win 8 VM, but it doesn't show up there either. How do I get my User image to show in knife azure?

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  • Opencv: Converting hue image to RGB image

    - by jhaip
    I am trying to show the hue component of the image from my webcam. I have split apart the image into the hue component but I can't figure out how to show the hue component as the pure colors. For example if one pixel of the image was B=189 G=60 R=60 then in HSV, H=0. I don't want the draw image to be the the gray values of hue but the RGB equivalent of the hue or H=0 - B=0 G=0 R=255 IplImage *image, *imageHSV, *imageHue; image = cvQueryFrame(capture); //image from webcam imageHSV = cvCreateImage( cvGetSize(image), IPL_DEPTH_8U, 3 ); imageHue = cvCreateImage( cvGetSize(image), IPL_DEPTH_8U, 1 ); cvCvtColor( image, imageHSV, CV_BGR2HSV ); cvSplit( imageHSV, imageHue, 0, 0, 0 ); I have a feeling there is a simple solution so any help is appreciated.

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  • IIS7 + ASP.NET MVC Client Caching Headers Not Working

    - by Tobin Harris
    Hey folks I've deployed an ASP.NET MVC app on IIS7 and Windows Server 2008. I've read posts on here, and around the web, but can't get the darn client-side caching to work. I'm trying to cache everything in the /Content folder. So far I've select that folder in IIS manager, and set the appropriate HTTP Response Headers (under Common Headers). I've also checked the web.config file in the /Content folder and the values there are being set. All resources in /Content come back with this (from FireBug): Cache-Control no-cache, no-store, must-revalidate Pragma no-cache Content-Type image/png Expires -1 Last-Modified Sun, 11 Oct 2009 19:01:40 GMT Accept-Ranges bytes Etag "f318d643a54aca1:0" Server Microsoft-IIS/7.0 X-Powered-By ASP.NET Date Sun, 11 Oct 2009 20:40:01 GMT Content-Length 620 Note the Cache-Control and Expires values for this static image being requested. The site is currently compiled in Debug (this will change), but surely that wouldn't make a difference? Obviously I'm overlooking something, any ideas would be appreciated. Thanks

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  • Caching images with different query strings (S3 signed urls)

    - by Brendan Long
    I'm trying to figure out if I can get browsers to cache images with signed urls. What I want is to generate a new signed url for every request (same image, but with an updated signature), but have the browser not re-download it every time. So, assuming the cache-related headers are set correctly, and all of the URL is the same except for the query string, is there any way to make the browser cache it? The urls would look something like: http://example.s3.amazonaws.com/magic.jpg?WSAccessKeyId=stuff&Signature=stuff&Expires=1276297463 http://example.s3.amazonaws.com/magic.jpg?WSAccessKeyId=stuff&Signature=stuff&Expires=1276297500 We plan to set the e-tags to be an md5sum, so will it at least figure out it's the same image at that point? My other option is to keep track of when last gave out a url, then start giving out new ones slightly before the old ones expire, but I'd prefer not to deal with session info.

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  • Simple but efficient way to store a series of small changes to an image?

    - by finnw
    I have a series of images. Each one is typically (but not always) similar to the previous one, with 3 or 4 small rectangular regions updated. I need to record these changes using a minimum of disk space. The source images are not compressed, but I would like the deltas to be compressed. I need to be able to recreate the images exactly as input (so a lossy video codec is not appropriate.) I am thinking of something along the lines of: Composite the new image with a negative of the old image Save the composited image in any common format that can compress using RLE (probably PNG.) Recreate the second image by compositing the previous image with the delta. Although the images have an alpha channel, I can ignore it for the purposes of this function. Is there an easy-to-implement algorithm or free Java library with this capability?

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  • Caching query results in django

    - by Marcio Cruz
    I'm trying to find a way to cache the results of a query that won't change with frequency. For example, categories of products from an e-commerce (cellphones, TV, etc). I'm thinking of using the template fragment caching, but in this fragment, I will iterate over a list of these categories. This list is avaliable in any part of the site, so it's in my base.html file. Do I have always to send the list of categories when rendering the templates? Or is there a more dynamic way to do this, making the list always available in the template?

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  • OBIEE 11.1.1 - How to configure HTTP compression / caching on Oracle BI Mobile app

    - by Ahmed Awan
     Applies to: OBIEE 11.1.1.5 Supported Physical Devices and OS: The Oracle BI Mobile application with HTTP compression / caching configurations is tested on following devices: iPhone 4S, 4, 3GS. iPad 2 and 1. Note these devices must be running the latest version of the iOS version, i.e. iOS 4.2.1 / iOS 5 is also supported. Configuring Pre-requisites: Prior to configuration, the Oracle Web tier software must be installed on server, as described in product documentation i.e. Enterprise Deployment Guide for Oracle Business Intelligence in Section 3.2, "Installing Oracle HTTP Server." The steps for configuring the compression and caching on Oracle HTTP Server are described in this PA blog at http://blogs.oracle.com/pa/entry/obiee_11g_user_interface_ui and in support Doc ID 1312299.1. Configuration Steps in Oracle BI Mobile application: 1. Download the BI Mobile app from the Apple iTunes App Store. The link is http://itunes.apple.com/us/app/oracle-business-intelligence/id434559909?mt=8 . 2. Add Server for example http://pew801.us.oracle.com:7777/analytics/ , here is how your “Server Setting” screen should look like on your OBI Mobile app:                                 Performance Gain Test (using Oracle® HTTP Server with OBIEE) The test with/without HTTP compression / caching was conducted on iPhone 4S / iPad 2 to measure the throughput (i.e. total bytes received) for Oracle® Business Intelligence Enterprise Edition. Below table shows the throughput comparison before and after using HTTP compression / caching for SampleApp using “QuickStart” dashboard accessing reports i.e. Overview, Details, Published Reporting and Scorecard. Testing shows that total bytes received were reduced from 2.3 MB to 723 KB. a. Test Results > Without HTTP Compression / Caching setting - Total Throughput (in Bytes) captured below: Total Bytes Statistics:        b. Test Results > With HTTP Compression / Caching settings - Total Throughput (in Bytes) captured below: Total Bytes Statistics:      

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  • Caching no .NET Framework 4.0

    - by anobre
    Olá pessoal, como estão? Hoje vou apresentar uma mudança interessante sobre caching, em comparação com versões anteriores. Introdução A versão 4.0 da plataforma .NET trouxe uma mudança estrutural esperada para os recursos de Cache. Nas versão 3.5 (até SP1), a plataforma fornecia uma implementação do Cache através do namespace System.Web.Caching. Nas versões anteriores o cache estava disponível no namespace System.Web, o que criada uma dependência com as classes do ASP.NET. Neste novo framework, o namespace System.Runtime.Caching reúne toda a API necessária para criar todas as tarefas comuns ao ASP.NET Caching de versões anteriores. System.Runtime.Caching e MemoryCache Tudo que precisamos para trabalhar com cache, em aplicações Web ou não, está reunido no namespace System.Runtime.Caching. A unidade básica de trabalho é a classe abstrata ObjectCache, que fornece a base para criar implementações customizadas de cache. E como é de se esperar, a classe MemoryCache é a implementação da classe abstrata ObjectCache para armazenamento das informações em memória. public class MemoryCache : ObjectCache, IEnumerable, IDisposable A utilização do cache é muito simples, bem parecida com o modelo anterior: ObjectCache cache = MemoryCache.Default; string fileContents = cache["filecontents"] as string; if (fileContents == null) { CacheItemPolicy policy = new CacheItemPolicy(); List<string> filePaths = new List<string>(); filePaths.Add("c:\\cache\\example.txt"); policy.ChangeMonitors.Add(new HostFileChangeMonitor(filePaths)); // Fetch the file contents. fileContents = File.ReadAllText("c:\\cache\\example.txt"); cache.Set("filecontents", fileContents, policy); } Label1.Text = fileContents; Extendendo o Cache É possível customizar todo mecanismo de cache através de várias abordagens. ScottGu escreveu sobre isto, que você pode acessar através deste link. Conclusão Algo muito esperado em versões anteriores, finalmente o cache está disponível sem criar relacionamento com assemblies exclusivamente Web. Perfeito para quem desenvolve outros tipos de aplicação, usufruindo deste recurso sem carregar código desnecessário. Abraços!

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  • ASP.NET Page Caching in a Web Farm

    - by Achilles
    We have a small web farm(2 servers) balanced by the built in network load balancer in Windows 2003. We have a few pages that use page caching. My question is: Is it possible that that a given user could cause a page to be cached and another user see that content? Here is the page directive for the page in question: <%@ OutputCache Duration="1" NoStore="true" VaryByParam="none" %> The reason the duration is set to "1" is to ensure that the page isn't cached any longer than 1 second because of transactions that actions on the page can trigger.

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  • ASP .NET - Substitution and page output (donut) caching - How to pass custom argument to HttpRespons

    - by zzare
    I would like to use substitution feature of donut caching. public static string GetTime(HttpContext context) { return DateTime.Now.ToString("T"); } ... The cached time is: <%= DateTime.Now.ToString("T") %> <hr /> The substitution time is: <% Response.WriteSubstitution(GetTime); %> ...But I would like to pass additional parameter to callback function beside HttpContext. so the question is: How to pass additional argument to GetTime callback? for instance, something like this: public static string GetTime(HttpContext context, int newArgument) { // i'd like to get sth from DB by newArgument // return data depending on the db values // ... this example is too simple for my usage if (newArgument == 1) return ""; else return DateTime.Now.ToString("T"); }

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  • Caching Solutions

    - by dave
    Has anyone done a thorough comparison of AppFabric and NCache or AppFabric and ScaleOut? We are currently looking to implement either AppFabric, NCache or ScaleOut for distributed caching in geographically distant locations and I would like to know anyone's thoughts who has compared them side by side. I appreciate that many people use one or the other and tell me why their chosen solution is great but I am really looking for a comparison of the two products. Such things as what does AppFabric not do or not do well (if anything), partially from a features point of view but also from developer's point of view. Is working with one compared to the other nicer, easier, more flexible, more powerful, etc. There are plenty of lists of features which I can compare but am really looking for a comparison from someone who has perhaps been in a similar position to us and has performed the evaluation that we are about to launch into which will give us some food for thought whilst we do so. Thanks in advance.

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  • Rails Routing Broken In Production - Caching of routes.rb suspected

    - by ming yeow
    Hi folks, i have an urgent problem. Essentially, my routing works on my localhost. But when i deployed this to production, the routes does not seem to work correctly. For example, given a new route "/invites" - sometimes i will get a 404, and sometimes it will work correctly. I suspect there is some caching going on somewhere, but i am not sure. Logs: when a page is not found (when the routes are supposed to be accurate) Processing UsersController#network (for 67.180.78.126 at 2010-06-01 09:59:31) [GET] Parameters: {"id"="new"} ActionController::RoutingError (No route matches "/comm/role_playing_games" with {}): app/controllers/application_controller.rb:383:in prev_page_label' app/controllers/application_controller.rb:238:in log_timed_info' app/controllers/users_controller.rb:155:in network' app/controllers/users_controller.rb:151:in network' app/controllers/application_controller.rb:44:in turn_on_query_caching' app/controllers/application_controller.rb:43:in turn_on_query_caching' app/controllers/application_controller.rb:42:in turn_on_query_caching' app/controllers/application_controller.rb:41:in turn_on_query_caching' app/controllers/application_controller.rb:40:in turn_on_query_caching' app/controllers/application_controller.rb:39:in turn_on_query_caching' haml (3.0.6) lib/sass/plugin/rack.rb:41:in `call' Rendering /mnt/app/releases/20100524233313/public/404.html (404 Not Found)

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  • Django Per-site caching using memcached

    - by Paul
    Hi, So I'm using per-site caching on a project and I've observed the following, which is kind of confusing. When I load a flat page in my browser then change it through admin and then do a refresh (within the cache timeout) there is no change in the page--as expected. However when I stat a new session in a different browser and load the page (still within the timeout) the app is hit instead of the cache, with the Isn't the cache key generated from the URL? it seems that the session state is getting in there somewhere, which is causing a cache miss. Any ideas? thanks MIDDLEWARE_CLASSES = ( 'django.middleware.cache.UpdateCacheMiddleware', 'django.middleware.common.CommonMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.middleware.gzip.GZipMiddleware', 'django.middleware.http.ConditionalGetMiddleware', 'django.middleware.doc.XViewMiddleware', 'ittybitty.middleware.IttyBittyURLMiddleware', 'django.contrib.flatpages.middleware.FlatpageFallbackMiddleware', 'maintenancemode.middleware.MaintenanceModeMiddleware', 'djangodblog.middleware.DBLogMiddleware', 'SSL.middleware.SSLRedirect', #SSL middleware to handle SSL 'django.middleware.cache.FetchFromCacheMiddleware', )

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  • C# .NET : Is using the .NET Image Conversion enough?

    - by contactmatt
    I've seen a lot of people try to code their own image conversion techniques. It often seems to be very complicated, and ends up using GDI+ funciton calls, and manipulating bits of the image. This has got me wondering if I am missing something in the simplicity of .NET's image conversion call when saving an image. Here's the code I have Bitmap tempBmp = new Bitmap("c:\temp\img.jpg"); Bitmap bmp = new Bitmap(tempBmp, 800, 600); bmp.Save(c:\temp\img.bmp, //extension depends on format ImageFormat.Bmp) //These are all the ImageFormats I allow conversion to within the program. Ignore the syntax for a second ;) ImageFormat.Gif) //or ImageFormat.Jpeg) //or ImageFormat.Png) //or ImageFormat.Tiff) //or ImageFormat.Wmf) //or ImageFormat.Bmp)//or ); This is all I'm doing in my image conversion. Just setting the location of where the image should be saved, and passing it an ImageFormat type. I've tested it the best I can, but I'm wondering if I am missing anything in this simple format conversion, or if this is suffice?

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  • HTML 5 offline caching

    - by kRON
    I've read the following Mozilla Developer article that explains how to implement HTML 5 offline resource caching in web apps. I've tried testing this locally: added the mime type to the list, created the manifest file, changed my doctype to the HTML 5 doctype, specified the manifest attribute and the correct path on the HTML element--but still I don't see the manifest file being consumed by Firefox at all. I've also checked the access logs on Apache and didn't see any requests for the manifest file being made. Has anyone given it a jab and had any success? I just don't know how to further troubleshoot the issue and would welcome any suggestions.

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  • XAMPP is caching .html files running as PHP

    - by Lee
    I have XAMPP (latest version) installed on my Mac OS 10.6.3 I've added the following to .htaccess because I want .html to be interpreted as PHP. AddType application/x-httpd-php .php .html The problem is that the default XAMPP config seems to be caching .html files as static... so even though the PHP statements inside are being called (for example, 'echo time()' in index.html displays the dynamic output)... the actual file is being cached. When I make changes to a .html file, I've having to restart Apache for it to load the newest changes. Looking at httpd.conf, it looks like it's loading the following cache mods.. LoadModule file_cache_module modules/mod_file_cache.so LoadModule cache_module modules/mod_cache.so LoadModule disk_cache_module modules/mod_disk_cache.so LoadModule mem_cache_module modules/mod_mem_cache.so Any idea how to implement a system whereby it checks the timestamp of the file, before loading it from cache? Thanks!

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  • How to center align background image in JPanel

    - by Jaguar
    I wanted to add background image to my JFrame. Background image means I can later add Components on the JFrame or JPanel Although I coudn't find how to add background image to a JFrame, I found out how to add background image to a JPanel from here: How to set background image in Java? This solved my problem, but now since my JFrame is resizable I want to keep the image in center. The code I found uses this method public void paintComponent(Graphics g) { //Draw the previously loaded image to Component. g.drawImage(img, 0, 0, null); //Draw image } Can anyone say how to align the image to center of the JPanel. As g.drawImage(img, 0, 0, null); provides x=0 and y=0 Also if there is a method to add background image to a JFrame then I would like to know. Thanks.

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  • Browser caching issue on a https site pressing f5

    - by sushil bharwani
    i am working on a website where i have content entry form. This form contains a tiny mce control. The control is composed of some 40-50 files. The testing reported that the entry form loads slow and evertime shows up 50 files loading to completely load the page. Is there a way i can decrease this time. I have taken help of browser caching by setting the expires header of static content to very far date. When i access the form through its link second or later times it loads fast without saying 40 files remaining. but when i do f5 it reloads the entire page. I m confused as to how is f5 different from clicking on the link. Just to add my url is https.Any suggestion to increase the performance of this form will be great.

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