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• Established javascript solution for secure registration & authentication without SSL

  - by Tomas

  Is there any solution for secure user registration and authentication without SSL? With "secure" I mean safe from passive eavesdropping, not from man-in-the-middle (I'm aware that only SSL with signed certificate will reach this degree of security). The registration (password setup, i.e. exchanging of pre-shared keys) must be also secured without SSL (this will be the hardest part I guess). I prefer established and well tested solution. If possible, I don't want to reinvent the wheel and make up my own cryptographic protocols. Thanks in advance.

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• how to call a function to refresh GUI

  - by SWKK

  Hi Guys, I am refactoring some code to decouple GUI from some state. #include <StateObject> Class GUI{ ... StateObject A; void doSomething() { A->hullaballoo();} **void ReFreshMyGui() { //take state A and redraw }** }; State object is being shared by multiple classes to update the state but this Gui Object specializes in displaying the state. So I would like to call the Refresh function via StateObject whenever its modified. I am not sure how or if signals will provide the solution. Any hints?

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• Design guidelines for cache mechanism

  - by Delashmate

  Hi All, I got assignment to write design for cache mechanism (this is work assignment, not homework), This is my first time writing a design document, Our program display images for doctors, and we want to reduce the parsing time of the images So we want to save the parsed data in advance (in files or inside database) Currently I have several design key ideas: Handle locks - each shared data structure should be handled, also files Test - add test to verify the data from the cache is equal to the data from the files To decouple the connection to the database- not to call directly to the database Cleanup mechanisem- to delete old files if the cahce directory exceed configurable threshold Support config file Support performance tool in the feature I will also add class diagram, data flow charts, and workflow What do you think I should add to the key ideas? Do you know good link to atricales about design? Thanks in advance, Dan

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• if all my views are passed a strongly typed viewdata, if they have a baseviewdata class, can I set a

  - by Blankman

  I want all my views to inherit from a baseview data so I can set some shared properties that all my views will need. Can I set some properties in OnExecuting so I don't have to do it for all Actions? I want to then display the string value of the property in all my view pages. If yes, how can I do this? I need to hook into the base view data somehow? so i'll have: public MyViewData : ViewData { } And I need one for generics also?

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• Feedly "Login with Google" system

  - by AR

  I'm trying to figure out how Feedly does their login with Google link. Based on the redirect URL it passes I'd think it was a google service, but at the same time, the login page says it's not associated "Note: Google is not affiliated with feedly. Your password will not be shared with the feedly service". Anyone know what exactly powers this? Is it Federated login with some special domain trickery allowing them to upload a site screenshot and description? Or is it something else.

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• C# Asynchronous Sockets questions.

  - by ccppjava

  Based on my reading and testing, with asynchronous sockets, the socket itself can be passed using state object (IAsyncResult result), also if store the socket as a private field, it would be captured by the callback methods. I am wondering how the IAysnResult is kepted between the BeginXXX and ReceiveXXX? It looks to me that after the BeginXXX call and the method ends, the state object would be disposed by GC if there is no reference to it. In the case of private field, how the private field is shared between threads? (As far as I know, a callback is executed using a thread from the default thread pool, which would be considered as a new thread.) Many thanks, hope the questions themselves are clear.

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• How do I create email addresses for all my users using my domain ([email protected])?

  - by rwain

  My client wants to create email addresses for all their dotnetnuke users using their domain. The point is to keep the user's email addresses 'private' while still allowing communication through a public email address that they can control. It's not necessary to have a full webmail interface (although that would be nice). I'm thinking it would be enough just to forward any mail on and just act as a gateway. So if an email was sent to [email protected], it would be forwarded on to the email address associated with the dotnetnuke account with username 'rwain'. Is this possible to do in a shared hosting environment? Or do I need to create some custom mail server that does a conversion of the email address and forwards it?

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• Using locks inside a loop

  - by Xaqron

  // Member Variable private readonly object _syncLock = new object(); // Now inside a static method foreach (var lazyObject in plugins) { if ((string)lazyObject.Metadata["key"] = "something") { lock (_syncLock) { if (!lazyObject.IsValueCreated) lazyObject.value.DoSomething(); } return lazyObject.value; } } Here I need synchronized access per loop. There are many threads iterating this loop and based on the key they are looking for, a lazy instance is created and returned. lazyObject should not be created more that one time. Although Lazy class is for doing so and despite of the used lock, under high threading I have more than one instance created (I track this with a Interlocked.Increment on a volatile shared int and log it somewhere). The problem is I don't have access to definition of Lazy and MEF defines how the Lazy class create objects. My questions: 1) Why the lock doesn't work ? 2) Should I use an array of locks instead of one lock for performance improvement ?

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• LNK2005: delete already defined error in VC++

  - by user333422

  Hi, I asked this question earlier as well: http://stackoverflow.com/questions/2773168/lnk2005-delete-already-defined-error-in-vc The answer I got was that I should be using dynamic version of DLLs. I did that and it compiled fine. Now, but when I gave the exe to one of my colleagues to run, they told me - they can't run it as it requires some shared dll, so they need a static one. When I try to do static build then I get the error as mentioned in my previous link. Do, I need to provide some other file as well with exe. I have got .lib file as well in the build directory. Shall I provide taht one as well? I can run it fine on my m/c in whichever directory I put it. Any help is much appreciated as I am really stuck. Thanks in advance, Suchita

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• Threaded application sleeps with other application

  - by DeeD

  I have a weird problem with my threaded software. I start 2 instances of the software. Each instance has 2 threads, one thread creates a socket to use, and the other one is uses the socket for communication. When one of the threads in one instance calls sleep(3), the other threads in the the other instance sleeps too. And the weirdest thing is that when I rebooted the computer, it works the first time, but after trying a second time, it sleeps like described. How is this possible? Is it using some shared resource?

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• ASP.Net layered communication

  - by Chris Klepeis

  Hi, We're developing a layered web application. The specs: 3 layers, data layer, business layer, ui layer. Programmed in C# Data Layer uses the entity framework Currently we plan on having the data layer return IEnumerable<T> to the business layer via linq 2 entities, and the business layer will return data to the ui layer. Since the ui layer has no knowledge of the existance of the data layer, how would it handle a result of IEnumerable passed to it from the BLL, where T is defined in the data layer? Are there any GOOD example out there on how to do this. Please note that I'm extremely new to factories / interfaces / abstraction to loosely couple layers. I saw the question here http://stackoverflow.com/questions/917457/passing-data-in-an-ntier-application and it was recommended to have the entity layer shared amongst all layers... however I do not want the other layers to be able to query the database.

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• one subdomain as cname for another domain, can i have different custom 404 pages

  - by lucky cool

  Actually I have a domain - domainone.com I have created a subdomain cname of anoter domain as abc.domaintwo.com - CNAME as - domainone.com so that I can use the js and css files e.g domainone.com/js/jquery.js files as abc.domaintwo.com/js/jquery.js SO Far everything is FINE, no issues at all. Problem: I have a custom 404 page for domainone.com and now when that abc.domaintwo.com goes 404 same page appears which i don't want. Any help is appreciated. Htaccess of domainone.com: ErrorDocument 404 /404/ All i want is to have different 404 for both..... Notes: Don't have access to shell for symlinks or alias as I am on shared hosting.

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• Using my ISerializable implementation instead of DataContractSerializer

  - by mpm

  My WCF client and server exchange objects whose types are defined on a class library shared by both, the server and the client. These objects implement custom serialization via ISerializable. However, my custom serialization is not being used. DataContractSerializer is being used, instead. How do I force my custom serialization to be used? The reason why I need to use my own serialization is because I do trasfer some big object graphs and my serialization algorithm does a good job in compressing/speeding up things.

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• HTML/JS: open other website without associated coockies

  - by Tim

  I have a web shop which sends my customers to a pretty popular website to redeem their just purchased product (at my site). However, I keep getting complaints that the product has been redeemed at the wrong account. Because the other website is that popular, it often appears that when the customers computer is shared by others the wrong account was logged in (automatically by a coockie). Now I'm wondering which steps I can take to prevent this from happening, since I don't have control over the other website (which does not make clear enough who's logged in). Is there some way to open another website without its coockies?

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• Is it possible to place Joomla under revision control?

  - by Tom

  We are a team of many developers working on a website that uses both Joomla and custom PHP scripts. The problem is that there are multiple developers working on various features which need to update information in Joomla (adding modules, changing existing ones or changing settings) and when one developer changes something, he usually makes the change locally first and then does the same thing (hopefully) on the production server. Not only that this is very error-prone, but the developers often forget to tell other developers about the changes. The custom PHP scripts are easily shared between developers, but the changes in Joomla are often forgotten and they lead to serious conflicts when a developer tries to replicate his local changes in production. I have thought about placing Joomla in a Mercurial repository, but how could we distribute the changes in the database between the development, the testing and the production machines?

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• using helper methods in a view in rails 3

  - by Frida777

  Hello everyone, there is something that is disturbing me a bit about rails 3. i am trying to upgrade my application from rails 2 to rails 3. i followed all the steps necessary to do and things were working well for me till now except one thing: i have a helper method that is defined differently in different helpers, for example it is defined in the application_helper in one way and the same method defined in a different way in the homepage_helper, and defined differently in another helper, let's say video_helper, in addition to that, it is used in a shared view that is used throughout the application, now if i am in the homepage, i want this function to get called from the homepage_helper and if i am in the video page, the function must be called from the video_helper, based on the concept of convention in rails, this worked perfectly in rails 2 but in rails 3, the function is always called from the last helper, alphabetically ordered, that is in the example, video_helper. How can i fix this? Kindly advice. Appreciate all the help.

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• Bitmap manipulation as a referenced object

  - by John Maloney

  I am working with a Bitmap object that I add annotations or copyright material to the image and then return the modified bitmap. My problem is that the Bitmap won't hold the changes made to it as it moves along the chain. I am treating it as a reference type and would assume that as it gets passed to each class it would carry the changes made to it. I have verified that the code inside of the MarkImage() classes does function, but which ever one gets called last is the one that has changes. Public Shared Function GetImage(ByVal imageDef As IImageDefinition) As Bitmap Dim image As Bitmap = Drawing.Image.FromFile(imageDef.Path) If Not imageDef.Authorization.IsAllowed(AuthKeys.CanViewWithoutCopyright) Then image = New MarkCopyrightImage(image).MarkImage() End If If Not imageDef.Authorization.IsAllowed(AuthKeys.CanViewWithoutAnnotations) Then image = New MarkAnnotateImage(image).MarkImage() End If Return image End Function How do I write changes to a bitmap object and then pass that object to another class while maintaining the changes? Answers in C# or VB are fine? Thanks

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• Need help on how to setup package structure and project

  - by jax

  I am new to Java and am making a license generator. This is my current setup. com.example.licensegenerator.client (used by the client application) :LicenseLoader (no Main method) :LicenseDownloader (no Main method) com.example.licensegenerator.server.keys (used by the server) :ProductKeyGenerator(Main method) com.example.licensegenerator.server.license (used on the server also) :LicenseGenerator(Main method) com.example.licensegenerator.lib (Shared classes between client and server) :Contants (no main) Now I have a few questions. Is it OK to have multiple Main() methods in a single project? Will I be able to compile them to different .jar files? (In this case I need two different jars for the server) Is there a better way to setup the packages? And a totally unrelated question, with exceptions, is it better to handle them right then and there or throw them and let the main method catch them all (the program cannot recover if an error occurs)

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• Changing a project's files based on solution in Visual Studio 2008

  - by emddudley

  In one C# solution I have several projects that share a CommonAssemblyInfo.cs file, so that certain assembly attributes are shared across all projects. This works fine so long as I only have one CommonAssemblyInfo.cs file. However I have several solutions (applications) which use these projects, and each solution has its own version of CommonAssemblyInfo.cs. How can I make the projects use a different CommonAssemblyInfo.cs file depending on which solution they are in? In the end I want my assemblies to have attributes specific to the solution they were compiled from. I don't think I can make them files Solution files because they can't all be in the same directory with the same filename. I can't use pre-build events because I don't have a particular project which is always built first. I would prefer not to use a build script because I would like to be able to build and run the solutions through the Visual Studio environment.

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• Using pthread condition variable with rwlock

  - by Doomsday

  Hello, I'm looking for a way to use pthread rwlock structure with conditions routines in C++. I have two questions: First: How is it possible and if we can't, why ? Second: Why current POSIX pthread have not implemented this behaviour ? To understand my purpose, I explain what will be my use: I've a producer-consumer model dealing with one shared array. The consumer will cond_wait when the array is empty, but rdlock when reading some elems. The producer will wrlock when adding(+signal) or removing elems from the array. The benefit of using rdlock instead of mutex_lock is to improve performance: when using mutex_lock, several readers would block, whereas using rdlock several readers would not block.

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• Released object crashes app

  - by John Smith

  I am using objective-C++ (+Boost) for iPhone development. I am in a rather tight loop and need to allocate and release a certain object. The code is something like this. for (int i=0;i<100;i++) { opt = [[FObj alloc] init]; //do stuff with opt [opt release]; } The FObj object is something like @interface FObj MyCPPObj * cppobj; @end In the implementation of FObj there is a dealloc method: -(void) dealloc { delete cppobj; //previously allocated with 'new' [super dealloc]; } I am afraid that if i don't release then the 'MyCPPObj's will just pile up. But releasing makes the app crash after the first loop. What am I doing wrong? Or perhaps should I make cppobj and boost::shared_ptr? (do boost shared pointers automatically release their objects when an objective-C++ object is deleted?)

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• WCF methods sharing a dictionary

  - by YeomansLeo

  I'm creating a WCF Service Library and I have a question regarding thread-safety consuming a method inside this library, here is the full implementation that I have until now. namespace WCFConfiguration { [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall, ConcurrencyMode = ConcurrencyMode.Single)] public class ConfigurationService : IConfigurationService { ConcurrentDictionary<Tuple<string,string>, string> configurationDictionary = new ConcurrentDictionary<Tuple<string,string>, string>(); public void Configuration(IEnumerable<Configuration> configurationSet) { Tuple<string, string> lookupStrings; foreach (var config in configurationSet) { lookupStrings = new Tuple<string, string>(config.BoxType, config.Size); configurationDictionary.TryAdd(lookupStrings, config.RowNumber); } } public void ScanReceived(string boxType, string size, string packerId = null) { } } } Imagine that I have a 10 values in my configurationDictionary and many people want to query this dictionary consuming ScanReceived method, are those 10 values be shared for each of the clients that request ScanReceived? Do I need to change my ServiceBehavior? The Configuration method is only consumed by one person by the way.

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• DTOs Collections mapping Problem

  - by the_knight5000

  I'm working now on a multi-tier project which has layers as following : DAL BLL GUI Layer and Shared DTOs between BLL and GUI layers. I'm facing a problem in mapping the Objects from DAO To DTO, No problem in the simple objects. The problem is in the Objects who have child collections of another objects. ex: Author Category --Categories --Authors the execution goes in an infinite loop of mapping and it get more complex when I want model Self-join tables ex: Safe Safe --TransferSafe(Collection<Safe>) --TransferSafe(Collection<Safe>) the execution goes in an infinite loop of mapping any suggestions about a good solution or a practical mapping pattern?

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• mongrel not working - Ruby on Rails

  - by Steven

  I have deployed my rails app to a live server(linux) and I have successfully installed the the mongrel gems, and I can successfully start the server for my app but when i try to acceess the website on the server i get the error The server at 196.xx.xxx.xx is taking too long to respond. Is there anything i need to do to be able to access my app on the browser? Mongrel Logs ** Starting Rails with production environment... ** Rails loaded. ** Loading any Rails specific GemPlugins ** Signals ready. TERM = stop. USR2 = restart. INT = stop (no restart). ** Rails signals registered. HUP = reload (without restart). It might not work well. ** Mongrel 1.1.5 available at 0.0.0.0:3001 ** Writing PID file to /home/xxxxxxx.co.za/shared/log/mongrel.pid

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• Static dictionary in .Net Thread safety

  - by Emmanuel

  Reading msdn documentation for dictionaries it says : "Public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe." Those this mean that with a dictionary such as this : static object syncObject = new object(); static Dictionary<string,MyObject> mydictionary= new Dictionary<string, MyObject>(); Is doing something like the code below unnecessary? lock (syncObject) { context = new TDataContext(); mydictionary.Add("key", myObject); }

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