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  • http server connectivity puzzle

    - by jpmartins
    I have been seeing some strange connection issue in the production environment. The setup has two IBM Http Server's (IHS) and a network IP load-balancer in front of them (round-robin). One instance the system is working fine, the next requests stop arriving at the IHS. Telnet directly to port 80 of the IHS is established sucessfully, but connection to the port 80 through the IP of the load-balancer fails! The puzzle comes next, the network admins say the load-balancer is working fine. When we finally reboot the IHS servers and request start flowing... The situation happened three times the last month and no obvious pattern was found. Any debug ideas?

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  • MVC Model State

    - by gnome
    Greetings On all my controllers I recycle the same code that wraps my models and to accesses the service layer -- and I'm tired for copy / pasting it into each controller: private IProjectService _service; public New() { _service = new ProjectService(new ModelValidation(this.ModelState)); } public New(IProjectService service) { _service = service; } Is there someplace where I can place this where all my controllers access it?

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  • Dataflow in Controllers & Layouts in Zend Framework

    - by favo
    I use a basic setup which uses a layout.phtml for the HTML Layout and view scripts for the content part. I want to control some variables in the layout in my controllers, i.e. the title of my site. How can I access my layout to output variables from within the controller? Thanks for your feedback!

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  • ASP.NET MVC & Web Services

    - by ANaimi
    Hello, Does adding a Web Service to my ASP.NET MVC project break the whole concept of MVC? That Web Service (WCF) depends on the Model layer from my MVC project to communicate with the back-end (so it looks to me like it needs to be part of the MVC solution). Should I add this to the Controller or Model layer?

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  • Creating a generic NotFound View in ASP.MVC

    - by George
    Hello guys, I'm having a problem to create a generic View to represent NotFound pages. The view is created and it's fine. I need to know how i can direct the user to the NotFound view in my Controllers and how to render a specific "Return to Index" in each controller. Here is some code: public class NotFoundModel { private string _contentName; private string _notFoundTitle; private string _apologiesMessage; public string ContentName { get; private set; } public string NotFoundTitle { get; private set; } public string ApologiesMessage { get; private set; } public NotFoundModel(string contentName, string notFoundTitle, string apologiesMessage) { this._contentName = contentName; this._notFoundTitle = notFoundTitle; this._apologiesMessage = apologiesMessage; } } // NotFound View <%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<Geographika.Models.NotFoundModel>" %> <asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server"> <%= Html.Encode(Model.ContentName) %> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server"> <h2><%= Html.Encode(Model.NotFoundTitle) %></h2> <p><%= Html.Encode(Model.ApologiesMessage) %></p> <!-- How can i render here a specific "BackToIndexView", but that it's not bound to my NotFoundModel? --> </asp:Content> // Controller piece of code // // GET: /Term/Details/2 public ActionResult Details(int id) { Term term = termRepository.SingleOrDefault(t => t.TermId == id); if (term == null) return View("NotFound"); // how can i return the specific view that its not bound to Term Model? // the idea here would be something like: // return View("NotFound",new NotFoundModel("a","b","c")); else return View("Details", term); } I'm not sure how to redirect to a whole different page. Can anyone give me any pointers? Thanks

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  • CSRF protecting and cross site form access

    - by fl00r
    Hi. I aw working on cross site authentication (some domains have got common authentication). So I want to send authentication data (login, password) to main domain from others. How should I use protect_from_forgery and how can I check if data received from valid domain? What I am thinking now is to turn off protect_from_forgery for session controller and check domain name of received data. But maybe I can configure CSRF protection for not only one domain?

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  • How to RESTful delete record Asp.Net Mvc 2

    - by Picflight
    I have delete links in my Asp.Net Mvc2 application. /{controller}/Delete/{id} It seems using link to delete has a security risk. Don’t use Delete Links because they create Security Holes I found this Implementing RESTful Routes & Controllers in ASP.NET MVC 2.0 but I am not sure how to implement a simple delete functionality using the new HttpDeleteAttribute class. Are there any examples on deleting, the RESTful approach?

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  • What to Expect in Rails 4

    - by mikhailov
    Rails 4 is nearly there, we should be ready before it released. Most developers are trying hard to keep their application on the edge. Must see resources: 1) @sikachu talk: What to Expect in Rails 4.0 - YouTube 2) Rails Guides release notes: http://edgeguides.rubyonrails.org/4_0_release_notes.html There is a mix of all major changes down here: ActionMailer changes excerpt: Asynchronously send messages via the Rails Raise an ActionView::MissingTemplate exception when no implicit template could be found ActionPack changes excerpt Added controller-level etag additions that will be part of the action etag computation Add automatic template digests to all CacheHelper#cache calls (originally spiked in the cache_digests plugin) Add Routing Concerns to declare common routes that can be reused inside others resources and routes Added ActionController::Live. Mix it in to your controller and you can stream data to the client live truncate now always returns an escaped HTML-safe string. The option :escape can be used as false to not escape the result Added ActionDispatch::SSL middleware that when included force all the requests to be under HTTPS protocol ActiveModel changes excerpt AM::Validation#validates ability to pass custom exception to :strict option Changed `AM::Serializers::JSON.include_root_in_json' default value to false. Now, AM Serializers and AR objects have the same default behaviour Added ActiveModel::Model, a mixin to make Ruby objects work with AP out of box Trim down Active Model API by removing valid? and errors.full_messages ActiveRecord changes excerpt Use native mysqldump command instead of structure_dump method when dumping the database structure to a sql file. Attribute predicate methods, such as article.title?, will now raise ActiveModel::MissingAttributeError if the attribute being queried for truthiness was not read from the database, instead of just returning false ActiveRecord::SessionStore has been extracted from Active Record as activerecord-session_store gem. Please read the README.md file on the gem for the usage Fix reset_counters when there are multiple belongs_to association with the same foreign key and one of them have a counter cache Raise ArgumentError if list of attributes to change is empty in update_all Add Relation#load. This method explicitly loads the records and then returns self Deprecated most of the 'dynamic finder' methods. All dynamic methods except for find_by_... and find_by_...! are deprecated Added ability to ActiveRecord::Relation#from to accept other ActiveRecord::Relation objects Remove IdentityMap ActiveSupport changes excerpt ERB::Util.html_escape now escapes single quotes ActiveSupport::Callbacks: deprecate monkey patch of object callbacks Replace deprecated memcache-client gem with dalli in ActiveSupport::Cache::MemCacheStore Object#try will now return nil instead of raise a NoMethodError if the receiving object does not implement the method, but you can still get the old behavior by using the new Object#try! Object#try can't call private methods Add ActiveSupport::Deprecations.behavior = :silence to completely ignore Rails runtime deprecations What are the most important changes for you?

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  • Internal Outlook clients prompted for OWA login when only accessing local internal Exchange server?

    - by TallGuy
    Hope someone can help with this one. Scenario is an internal Exchange 2003 server. OWA front end server in the DMZ. OWA logins work fine, with SSL configured. Over the last week (3 times so far) when an internal person opens their Outlook and then tries to open an email with JPG attachments they are prompted for the webmail login. Why? Even if they enter their valid webmail OWA login it fails and reprompts once for each attachment. Once they get through the multiple login prompts, they can double-click to open the attachments, but they are all blank. Any ideas on what could cause this? Why would someone accessing an email from an internal Outlook client get prompted for details of the OWA/webmail server login?

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  • In Varnish, is it normal for the number of freed bytes to be 60% of those allocated?

    - by user331397
    I have an installation of Varnish 3.02 on an Amazon EC2 Medium Linux instance in front of two relatively low-traffic websites. After an uptime of 2 hours, there are 3400 objects in the cache. Using varnishstat, I checked the variables SMA.s0.c_bytes and SMA.s0.c_freed, which I assume correspond to the total number of bytes allocated since startup and the number freed, respectively. No objects should have had time to expire during these two hours, but still about 60% of the memory allocated since startup (330MB out of 560MB) has already been freed. Do you know if this is normal? If not, do you know what kind of configuration could be wrong?

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  • Common filesystem for servers behind a rackspace load balancer

    - by thanos panousis
    Our PHP application consists of a single web server that will receive files from clients and perform a CPU-intensive analysis on them. Right now, analysis of a single user upload can take 3sec to conclude and take 100% CPU. This makes our system capacity amount to 1/3 requests per second. My team's requirement is to increase capacity without a lot of code reengineering. A possible solution would be to set up a load balancer in front of multiple servers running the same app, connecting to a common DB. The problem is that the analysis outputs files on disk. A load balancer would increase capacity, but then files won't be available between servers so consequent client requests may fail. We are hosted on Rackspace, is there a way to configure some sort of "common" storage for all servers, without having to rewrite our file persistance code? Current code relies on simple fopens etc. What are our options?

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  • CoreData NSFetchedResultsController Empty Section Display

    - by user280390
    Hello I would like to show a fixed number of sections in a table view with a Fetched Results Controller as the data source. If you image the contacts app where sections organised by the alphabet, it will not have a header for B if there are no contacts in that section, so the section headers you see are A then C. I would like to display a section header in my table (for B), but without any rows. an empty section in effect. Can NSFetchedResultsController do this for me?

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  • Can I constrain a route parameter to a certain type in ASP.net MVC?

    - by Paul Suart
    I have the following route: routes.MapRoute( "Search", // Route name "Search/{affiliateId}", // URL with parameters new { controller = "Syndication", action = "Search" } // Parameter defaults ); Is there a way I can ensure "affiliateId" is a valid Guid? I'm using MVCContrib elsewhere in my site and I'm fairly it provides a way to implement this kind of constraint.... I just don't know what it is!

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  • Memory allocation and release for UIImage in iPhone?

    - by rkbang
    Hello all, I am using following code in iPhone to get smaller cropped image as follows: - (UIImage*) getSmallImage:(UIImage*) img { CGSize size = img.size; CGFloat ratio = 0; if (size.width < size.height) { ratio = 36 / size.width; } else { ratio = 36 / size.height; } CGRect rect = CGRectMake(0.0, 0.0, ratio * size.width, ratio * size.height); UIGraphicsBeginImageContext(rect.size); [img drawInRect:rect]; UIImage *tempImg = [UIGraphicsGetImageFromCurrentImageContext() retain]; UIGraphicsEndImageContext(); return [tempImg autorelease]; } - (UIImage*)imageByCropping:(UIImage *)imageToCrop toRect:(CGRect)rect { //create a context to do our clipping in UIGraphicsBeginImageContext(rect.size); CGContextRef currentContext = UIGraphicsGetCurrentContext(); //create a rect with the size we want to crop the image to //the X and Y here are zero so we start at the beginning of our //newly created context CGFloat X = (imageToCrop.size.width - rect.size.width)/2; CGFloat Y = (imageToCrop.size.height - rect.size.height)/2; CGRect clippedRect = CGRectMake(X, Y, rect.size.width, rect.size.height); //CGContextClipToRect( currentContext, clippedRect); //create a rect equivalent to the full size of the image //offset the rect by the X and Y we want to start the crop //from in order to cut off anything before them CGRect drawRect = CGRectMake(0, 0, imageToCrop.size.width, imageToCrop.size.height); CGContextTranslateCTM(currentContext, 0.0, drawRect.size.height); CGContextScaleCTM(currentContext, 1.0, -1.0); //draw the image to our clipped context using our offset rect //CGContextDrawImage(currentContext, drawRect, imageToCrop.CGImage); CGImageRef tmp = CGImageCreateWithImageInRect(imageToCrop.CGImage, clippedRect); //pull the image from our cropped context UIImage *cropped = [UIImage imageWithCGImage:tmp];//UIGraphicsGetImageFromCurrentImageContext(); CGImageRelease(tmp); //pop the context to get back to the default UIGraphicsEndImageContext(); //Note: this is autoreleased*/ return cropped; } I am using following line of code in cellForRowAtIndexPath to update the image of the cell: cell.img.image = [self imageByCropping:[self getSmallImage:[UIImage imageNamed:@"goal_image.png"]] toRect:CGRectMake(0, 0, 36, 36)]; Now when I add this table view and pop it from navigation controller, I see a memory hike.I see no leaks but memory keeps climbing. Please note that the images changes for each row and I am creating the controller using lazy initialization that is I create or alloc it whenever I need it. I saw on internet many people facing the same issue, but very rare good solutions. I have multiple views using the same way and I see almost memory raised to 4MB within 20-25 view transitions. What is the good solution to resolve this issue. tnx.

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  • How to charge an iPhone on a Windows PC without Installaing iTunes

    - by Martin Hollingsworth
    I want to be able to charge my iPhone on my work computer, which is running Windows Server 2008 SP1 64-Bit. When I plug the iPhone in with the USB cable, it will not charge. Windows attempts to locate a driver for the device but only comes up with a generic Camera device and even if I allow that to be installed, the iPhone still does not charge. I have checked the computer's BIOS settings and did not find anything relating to power on the USB devices. I also tried this on ports at the back of the computer in addition to those on the front. The PC is a Dell Optiplex 780. As far as I can tell USB devices do not charge unless Windows has installed an appropriate driver. Since it is a work computer I do not want to install iTunes which does include a driver. I have a workaround that I will post as an answer for reference.

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  • Thin web server - single or multiple instances per IP address:port?

    - by wchrisjohnson
    I'm deploying a rack/sinatra/web socket app onto several servers and will use thin as the web server (http://code.macournoyer.com/thin/). There are almost no views to show, so I am not front-ending it with a traditional web server like Apache or nginx. In general, you see thin started and the underlying config file for it has the number of server instances to start, say 3, and the port to start with, say 5000. So, in my example, when thin starts, it starts up three instances on a range of ports, starting on port 5000. If I have a series of virtual machines, say 3, 6, 9, etc. that I treat as a cluster, would/should I choose to start a single thin instance on each VM, or multiple instances on each VM? Why? Thanks - Chris

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  • All UITableCells rendered at once... why?

    - by Greg
    I'm extremely confused by the proper behavior of UITableView cell rendering. Here's the situation: I have a list of 250 items that are loading into a table view, each with an image. To optimize the image download, I followed along with Apple's LazyTableImages sample code... pretty much following it exactly. Really good system... for reference, here's the cell renderer within the Apple sample code: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { // customize the appearance of table view cells // static NSString *CellIdentifier = @"LazyTableCell"; static NSString *PlaceholderCellIdentifier = @"PlaceholderCell"; // add a placeholder cell while waiting on table data int nodeCount = [self.entries count]; if (nodeCount == 0 && indexPath.row == 0) { UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:PlaceholderCellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:PlaceholderCellIdentifier] autorelease]; cell.detailTextLabel.textAlignment = UITextAlignmentCenter; cell.selectionStyle = UITableViewCellSelectionStyleNone; } cell.detailTextLabel.text = @"Loading…"; return cell; } UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease]; cell.selectionStyle = UITableViewCellSelectionStyleNone; } // Leave cells empty if there's no data yet if (nodeCount > 0) { // Set up the cell... AppRecord *appRecord = [self.entries objectAtIndex:indexPath.row]; cell.textLabel.text = appRecord.appName; cell.detailTextLabel.text = appRecord.artist; // Only load cached images; defer new downloads until scrolling ends if (!appRecord.appIcon) { if (self.tableView.dragging == NO && self.tableView.decelerating == NO) { [self startIconDownload:appRecord forIndexPath:indexPath]; } // if a download is deferred or in progress, return a placeholder image cell.imageView.image = [UIImage imageNamed:@"Placeholder.png"]; } else { cell.imageView.image = appRecord.appIcon; } } return cell; } So – my implementation of Apple's LazyTableImages system has one crucial flaw: it starts all downloads for all images immediately. Now, if I remove this line: //[self startIconDownload:appRecord forIndexPath:indexPath]; Then the system behaves exactly like you would expect: new images load as their placeholders scroll into view. However, the initial view cells do not automatically load their images without that prompt in the cell renderer. So, I have a problem: with the prompt in the cell renderer, all images load at once. Without the prompt, the initial view doesn't load. Now, this works fine in Apple sample code, which got me wondering what was going on with mine. It's almost like it was building all cells up front rather than just the 8 or so that would appear within the display. So, I got looking into it, and this is indeed the case... my table is building 250 unique cells! I didn't think the UITableView worked like this, I guess I thought it only built as many items as were needed to populate the table. Is this the case, or is it correct that it would build all 250 cells up front? Also – related question: I've tried to compare my implementation against the Apple LazyTableImages sample, but have discovered that NSLog appears to be disabled within the Apple sample code (which makes direct behavior comparisons extremely difficult). Is that just a simple publish setting somewhere, or has Apple somehow locked down their samples so that you can't log output at runtime? Thanks!

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  • What is Dispatcher Servlet in Spring?

    - by theband
    http://maestric.com/wiki/lib/exe/fetch.php?w=&h=&cache=cache&media=java:spring:spring_mvc.png In the above image, HTTP request sends something to Dispatcher Servlet. My Question is what does Dispatcher Servlet do. Is it something like getting the information thrown from the web page and throwing it to the controller.

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  • Access Denied Error in PagesListCPVEventReceiver post SharePoint SP2 upgrade

    - by Jeff
    I am seeing the following errors from one of the SharePoint Web Front Ends after the SP2 upgrade. Has anyone else seen this error or a solution? Event Type: Error Event Source: Windows SharePoint Services 3 Event Category: General Event ID: 6875 Date: 2009-10-27 Time: 13:09:57 User: N/A Computer: XXXXXXX Description: Error loading and running event receiver Microsoft.SharePoint.Publishing.PagesListCPVEventReceiver in Microsoft.SharePoint.Publishing, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c. Additional information is below. : Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

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  • A question mark within a @PathVariable in Spring MVC?

    - by sp00m
    Within the @Controller of a search engine: @RequestMapping(value = "/search/{query}", method = RequestMethod.GET) public String search(@PathVariable String query) {} If a user wants to search /search/w?rld (wich should match world, warld, whrld, etc.), the variable query equals w, because of the question mark which indicated a GET var. I tried "/search/{query:.+}", but still doesn't work. Any idea how to solve that problem?

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