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• SCNetworkReachability compiling error

  - by user262325

  Hello everyone I try to compile Ercia Sadun's sample codes at: http://github.com/erica/iphone-3.0-cookbook-/tree/master/C13-Networking/14-Web%20Browser/ There is error report : warning: in /Users/interdev/iphone source code/Web Browser/Classes/SystemConfiguration.framework/SystemConfiguration, missing required architecture i386 in file Undefined symbols: "_SCNetworkReachabilityScheduleWithRunLoop", referenced from: +[UIDevice(Reachability) scheduleReachabilityWatcher:] in UIDevice-Reachability.o "_SCNetworkReachabilityCreateWithAddress", referenced from: +[UIDevice(Reachability) hostAvailable:] in UIDevice-Reachability.o +[UIDevice(Reachability) pingReachabilityInternal] in UIDevice-Reachability.o "_SCNetworkReachabilityUnscheduleFromRunLoop", referenced from: +[UIDevice(Reachability) unscheduleReachabilityWatcher] in UIDevice-Reachability.o "_SCNetworkReachabilitySetCallback", referenced from: +[UIDevice(Reachability) scheduleReachabilityWatcher:] in UIDevice-Reachability.o +[UIDevice(Reachability) scheduleReachabilityWatcher:] in UIDevice-Reachability.o +[UIDevice(Reachability) unscheduleReachabilityWatcher] in UIDevice-Reachability.o "_SCNetworkReachabilityGetFlags", referenced from: +[UIDevice(Reachability) hostAvailable:] in UIDevice-Reachability.o +[UIDevice(Reachability) pingReachabilityInternal] in UIDevice-Reachability.o ld: symbol(s) not found collect2: ld returned 1 exit status "_SCNetworkReachabilityScheduleWithRunLoop", referenced from: +[UIDevice(Reachability) scheduleReachabilityWatcher:] in UIDevice-Reachability.o "_SCNetworkReachabilityCreateWithAddress", referenced from: +[UIDevice(Reachability) hostAvailable:] in UIDevice-Reachability.o +[UIDevice(Reachability) pingReachabilityInternal] in UIDevice-Reachability.o "_SCNetworkReachabilityUnscheduleFromRunLoop", referenced from: +[UIDevice(Reachability) unscheduleReachabilityWatcher] in UIDevice-Reachability.o "_SCNetworkReachabilitySetCallback", referenced from: +[UIDevice(Reachability) scheduleReachabilityWatcher:] in UIDevice-Reachability.o +[UIDevice(Reachability) scheduleReachabilityWatcher:] in UIDevice-Reachability.o +[UIDevice(Reachability) unscheduleReachabilityWatcher] in UIDevice-Reachability.o "_SCNetworkReachabilityGetFlags", referenced from: +[UIDevice(Reachability) hostAvailable:] in UIDevice-Reachability.o +[UIDevice(Reachability) pingReachabilityInternal] in UIDevice-Reachability.o ld: symbol(s) not found collect2: ld returned 1 exit status Build failed (5 errors) even I add systemConfiguration.framework, it reported same error. Welcome any comment Thanks interdev

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• One Update Panel vs. Multiple Update Panels

  - by mattruma

  I have an ASP.NET web page that displays a variety of fields that need to be updated best on certain conditions, button clicks and so on. We've implemented AJAX, using the ASP.NET Update Panel to avoid visible postbacks. Originally there was only one area that needed this ability ... that soon expanded to other fields. Now my web page has multiple UpdatePanels. I am wondering if it would be best to just wrap the entire form in a single UpdatePanel, or keep the individual UpdatePanels. What are the best practices for using the ASP.NET UpdatePanel?

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• Non RBAC User Roles and Permissions System: a role with properties

  - by micha12

  We are currently designing a User Roles and Permissions System in our web application (ASP.NET), and it seems that we have several cases that do no fit within the classical Role-Based Access Control (RBAC). I will post several questions, each devoted to a particular case. This is my second question (the first question is here: http://stackoverflow.com/questions/2839797/non-rbac-user-roles-and-permissions-system-checking-the-users-city). We have the following case: we need to implement a Manager role in our web application. However, a Manager can belong to one or several companies (within a big group of companies for which we are creating this web app). Say, there can be “Manager of companies A and B”, “Manager of company C”, etc. Depending on the companies that the Manager belongs, he has access to certain operations: for example, he can communicate with clients only of those companies that he belongs to. That is, “Manager of companies A and B” can only have contacts with clients of companies A and B, and not with those of company C. He can also view clients’ details pages of companies A and B and not of C, etc. It seems that this case falls within the RBAC. However, this is not really the case. We will need to create a ManagerRole class that will have a Companies property – that is, this will not be just a role as a collection of permissions (like in the classical RBAC), but a role with properties! This was just one example of a role having properties. There will be others: for example, an Administrator role that will also belong to a number of companies and will also have other custom properties. This means that we will a hierarchy or roles classes: class Role – base class class ManagerRole : Role List Companies class AdministratorRole : Role List Companies Other properties We investigated pure RBAC and its implementation in several systems, and found no systems featuring a hierarchy or roles, each having custom properties. In RBAC, roles are just collections of permissions. We could model our cases using permission with properties, like ManagerPermission, AdministratorPermission, but this has a lot of drawbacks, the main being that we will not be able to assign a role like “Manager of Companies A and B” to a user directly, but will have to create a role containing a ManagerPermission for companies A and B… Moreover, a "Manager" seems to be rather a "role" (position in the company) rather than a "permission" from the linguistic point of view. Would be grateful for any ideas on this subject, as well as any experience in this field! Thank you.

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• Polling duplex does not scale... what's the alternative?

  - by user80855

  Our tests showed that the polling duplex binding simply does not scale and can not be used on a service within a web-farm or even a web garden. We have looked at TCP/IP sockets for a client push method, but the firewall issue is does allow us to use sockets. I was wondering what is the alternative "free" solution to this problem? allowing us to scale and allowing us to push data to client... I have also tried the solution in this article http://tomasz.janczuk.org/2009/09/scale-out-of-silverlight-http-polling.html but at the end, there was too much polling on a database, and performance was affected. Our Silverlight application need a pub/sub design, but it needs to be reliable and scalable... any ideas?

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• Parameter passing become pointer for integer

  - by Kangkan

  I am working on a c/Linux app for a device. I consume a web service (in WCF/c#) and use gSOAP for the same. The issue is that the parameters in the service methods become pointers for simple data types like int, short etc also. I initially used the same service exposed as ASMX web service and the client proxy generated using gSOAP created methods with parameters passed as values. But once the service has been upgraded to WCF, all the parameters became pointers. Can somebody help?

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• SQL Server does not exist or access denied.

  - by KareemSaad

  SQL Server does not exist or access denied. I had this problem when browsing web site

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• On-screen keyboard not appearing when editing text fields in a UIWebView

  - by andrewebling

  I have a web view which displays a simple login form, containing username and password fields. However when the user clicks in one of the text fields, although the cursor appears in the text field, the on-screen keyboard does not appear. I've tried registering for UIKeyboardWillShowNotifications notifications and I see this notification arrive, however the keyboard doesn't actually appear on the screen. I've also tried sending the web view to the back of the view hierarchy and changing it's frame so it doesn't occupy the whole screen. However neither of these measures have solved the problem. What would people recommend trying next?

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• GoogleAppEngine : JAR for enhancer not found, yet ASM is on the classpath

  - by James.Elsey

  When deploying my application to GoogleAppEngine I'm getting the following message after the upload Exception in thread "Thread-0" You have selected to use ClassEnhancer "ASM" yet the JAR for that enhancer does not seem to be in the CLASSPATH! org.datanucleus.enhancer.NucleusEnhanceException: You have selected to use ClassEnhancer "ASM" yet the JAR for that enhancer does not seem to be in the CLASSPATH! at org.datanucleus.enhancer.DataNucleusEnhancer.init(DataNucleusEnhancer.java:212) at org.datanucleus.enhancer.DataNucleusEnhancer.addClasses(DataNucleusEnhancer.java:370) at org.datanucleus.enhancer.EnhancerProcessor$EnhanceRunnable.run(EnhancerProcessor.java:163) at java.lang.Thread.run(Thread.java:636) I'm not sure why this is happening, since I have the following in my POM <dependency> <groupId>asm</groupId> <artifactId>asm</artifactId> <version>3.2</version> </dependency> Which is required by GAE, and the ASM jar is located in the target directory, so I'm failing to see what the issue is Any ideas? [james@nevada gae-deployment]$ ls target/salestracker/WEB-INF/lib/asm* target/salestracker/WEB-INF/lib/asm-3.2.jar

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• How to propagate spring security login to EJBs?

  - by tangens

  Context I have a J2EE application running on a JBoss 4.2.3 application server. The application is reachabe through a web interface. The authentication is done with basic authentication. Inside of the EJBs I ask the security context of the bean for the principal (the name of the logged in user) and do some authorization checks if this user is allowed to access this method of the EJB. The EJBs life inside a different ear than the servlets handling the web frontend, so I can't access the spring application context directly. Required change I want to switch to Spring Security for handling the user login. Question How can I propagate the spring login information to the JBoss security context so I can still use my EJBs without having to rewrite them? Ideas and links I already found a page talking about "Propagating Identity from Spring Security to the EJB Layer", but unfortunatelly it refers to an older version of Spring Security (Acegi) and I'm not familiar enough with Spring Security to make this work with the actual version (3.0.2).

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• change the class loading order google app engine java

  - by Shekhar

  I am trying to create an application on google app engine using struts2. Struts2 internally uses freemarker .One of the Freemarker framework classes suppose X internally uses a class javax.swing.Treenode which is not in google app engine jre white list. Now in order to run my application i created a new class X in the same package structure as it was in freemarker framework and copied the class to WEB-INF classes.Then When i run my application it run fine. The problem is that i want to take out the class X from my application sourcecode and move it to newly created jar and place it in WEB-INF/lib folder. So that i can reuse the code in multiple project and my code remains clean of the freemarker code. But when i run the application it picks the old class X from the original freemarker framework.As a result i get ClassNotFoundException. Can anyone provide any help such that i can change the ClassLoading order such that my jar containing X class loads first.

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• IE8 error with Certificate

  - by Jon B

  I have installed a certificate with multiple Common Names on a Red Hat server in the jks format. The web page can be accessed with Firefox and the certificate gets imported. However, IE8 gives the error "Internet Explorer cannot display the webpage". I added the cert with MMC and its properties shows "This certificate has an nonvalid digital signature.". Also the cert doesn't have the URL of the web page in it. The cert does have a valid signature in Firefox and the URL mismatch is ignored. How can I get IE8 to accept it. This cert is required for another Application (where it works fine) and cannot be changed except to change the format. I already have it in PKCS12, jks and pem formats.

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• Boost Thread Specific Storage Question (boost/thread/tss.hpp)

  - by Hassan Syed

  The boost threading library has an abstraction for thread specific (local) storage. I have skimmed over the source code and it seems that the TSS functionality can be used in an application with any existing thread regardless of weather it was created from boost::thread --i.e., this implies that certain callbacks are registered with the kernel to hook in a callback function that may call the destructor of any TSS objects when the thread or process is going out of scope. I have found these callbacks. I need to cache HMAC_CTX's from OpenSSL inside the worker threads of various web-servers (see this, detailed, question for what I am trying to do), and as such I do not controll the life-time of the thread -- the web-server does. Therefore I will use the TSS functionality on threads not created by boost::thread. I just wanted to validate my assumptions before I started implementing the caching logic, are there any flaws in my logic ?

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• How to get XDebug working on Mac command line PHP

  - by Eugene M

  I recently installed Zend Server Community Edition on a Mac with Snow Leopard. I can't get XDebug to work ... it shows up in the output for phpinfo from a web browser, but when I var_dump() a variable, there is no special output, and when I run phpunit, code coverage reports aren't generated. Also when I type php -m at the command line, there is nothing for XDebug. I suspect that it's because the Mac is running the executable of PHP that was bundled with it instead of the executable of PHP that came with the Zend Server install. When I type /usr/local/zend/bin/php -m, XDebug does show up. I followed the instructions at http://akrabat.com/php/some-notes-on-zend-server-ce-for-mac-os-x/. Also I downloaded the xdebug.so from the Komodo web site. Zend Debugger and all other Zend extensions are disabled. So how can I get XDebug working correctly?

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• asp.net mvc deployment

  - by Casey

  I've been dealing with a legacy asp.net 2.0 web site that was originally setup to deploy everything (source uncompiled) to the target server. I've been looking at doing some major upgrades and want to move to asp.net mvc. I'm coming from mostly a Java background where we typically deploy everything inside of a Web ARchive (war file) and the application server takes it from there. Is there a similar concept in the .net world? Right now in my mvc test app, I just put the compiled code into the deployed bin folder and the rest of the script/view files there as well. From what I have been reading it seems that most use the Publish feature of VS.

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• ASP.NET - dynamically creating database connection in datasets

  - by Foo

  I am currently using datasets for my data access layer. I currently store the connection string in the web.config file. I need the ability to change the connection to another database before any queries are processed. Is there an event that is triggered or a base class that can be modified that intercepts the process of retrieving the connection string from the web.config file? Is there any way to handle multiple database connections using the same code base and also take advantage of the connection pooling? I understand the best method is to get rid of datasets and use custom data objects. Any ideas?

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• Why is VB so popular? [closed]

  - by aaaidan

  To me, Visual Basic seems clumsy, ugly, error-prone, and difficult to read. I'll let others explain why. While VB.net has clearly been a huge leap forward for the language in terms of features, I still don't understand why anyone would choose to code in VB over, say, C#. However, I still see (what seems to be) the vast majority of commercial web apps from "MS shops" are built in VB. I could stand corrected on this, but VB still seems more popular than it deserves. Can anyone help answer any (or all) of these questions: Am I missing something with VB? Is it easier to learn, or "friendlier" than C#? Are there features I don't know about? Why is VB/VB.net so frequently used today, especially in web projects?

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• Trying to pass Model down to partial, how do I do this?

  - by mrblah

  My action creates a strongly typed viewdata, which is passed to my view. In the view, I pass the Model to the render partial method. public ActionResult Index() { ViewDataForIndex vd = new ViewDataForIndex(); vd.Users = Users.GetAll(); return View(vd); } public class ViewDataForIndex: ViewData { public IList<User> Users {get;set;} } now in the view: <%@ Page Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<ViewDataForIndex>" %> <% Html.RenderPartial("~/controls/blah.ascx", ViewData.Model); %> and in blah.ascx: <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl" %> how do I access my model now? if I wanted to create a strongly typed class for my ViewUserControl, how would I do that? inherit from?

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• Integrating Tomcat7 and Eclipse Helios on Snow Leopard

  - by ktm5124

  I am trying to write a "Hello World" web application using Tomcat and Eclipse, in order to familiarize myself with building Tomcat projects. So far I've gleaned from Google searches that I need to install Eclipse Web Tools Platform (WTP) to go ahead with it. But when I go to Help-Install New Software I can't find any software update site that is hosting WTP. My default "Available Software Sites" are Helios, Mylyn for Eclipse Helios, and the Eclipse Project Updates. Do I need to add a new software update site to install WTP? If so, what is the URL? If not, where can I find WTP? Thanks in advance.

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• Getting ready to learn html5

  - by vtortola

  I'm a desktop application developer, and I plan learning html5, but as it's not released, there are (almost) no published books and not too much infomation for beginners on the web... I feel I should start with html4 and the current web development skills. I think I should start with html4, css, and javascript... but there are so many technologies related that I get lost :D So, what current technologies will be still used when html5 is released? I mean, what about "jquery" and "ajax"? I know they are javascript under the hood, but will they still make sense in the future? What would you recommend me considering that I have just a little bit of html knowlegde, almost null CSS and completely null in javascript?

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• Modifying listbox values with jQuery in WebForm not posting back

  - by Peter

  When hitting a button, an error would occur: System.Web.HttpUnhandledException: Exception of type 'System.Web.HttpUnhandledException' was thrown. --- System.ArgumentException: Invalid postback or callback argument. Event validation is enabled using in configuration or in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation. I then added EnableEventValidation="false" into my @Page directive, which fixed the error. Now after manipulating the listbox, the new values in the listbox are not posted back to the server. How can I solve this?

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• ASP.NET 32-bit machine compiled now trying to run on 64-bit machine

  - by user54064

  I have an ASP.NET app that was compiled on a 32-bit machine. There are many different assemblies that are referenced. I opened the web site's main dll with ILDASM and looked at the .corflags. It stated it was ILONLY. However, when I run the web site locally on the 64-bit machine (Windows XP Pro 64-bit), I get "is not a valid Win32 applciation". Shouldn't the app run as 64-bit since it was compiled with "AnyCPU"? How can I get this to work? I am using .NET 3.5.

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• Predict Stock Market Values

  - by mrlinx

  I'm building a web semantic project that gathers the maximum ammount of historic data about a certain company and tries to predict its future market stock values. For data I have the historic stock values (not normalized), news (0 to 1 polarity) and subjective content (also a 0 to 1 polarity). What is the best AI system to train and use for this kind of objective? Is a simple NN with back-propagation training the best I can hope for? update: Everyone is concerned about the quality of this system. Although I'm pretty sure the system is as good as a random prediction (or even worse), this is a school project around artificial intelligence and web semantics. Therefore I'm only concerned in picking the best kind of train method for the data I have (NN, RBF, SVM, Bayes, neuro-fuzzy, etc). Its not about making money.

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• ASP.NET CompositeControl with child controls that contain children

  - by tomfanning

  I am building an ASP.NET server control which extends CompositeControl. I need fine grained control over the rendering, so I override Render() and output the child controls myself, interspersed with HTML generation code: writer.AddStyleAttribute("float", "left"); writer.RenderBeginTag(System.Web.UI.HtmlTextWriterTag.Div); writer.RenderBeginTag(System.Web.UI.HtmlTextWriterTag.Strong); writer.Write("Table"); writer.RenderEndTag(); // strong writer.WriteBreak(); tableList.RenderControl(writer); writer.RenderEndTag(); // div This works really well for user controls that just contain simple controls without children of their own. However, if I want to use something like a MultiView or an UpdatePanel I run into problems, since I can't override Render() on View or UpdatePanel without extending them, and if I do extend them the implementation would presumably have to depend on FindControl() voodoo to get references to the right controls during render. That doesn't sound like the right way to do this - is there a better way?

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• c# ASP HttpResponse with redirect causes HTTP 302

  - by acnse

  Hi, I have a flow of web pages A and B. On the web page A, I do a "Response.Redirect("B.aspx"); The page B needs a client certificate. When the redirect is done I see a popup asking for a client certificate. I select the correct certificate, which is retrieved from a smart card, and then I insert the pin. Right after, I see a page saying that the connection was lost, and I receive an HTTP 302. I never reach the page B.aspx. I tried to add the following line "Response.RedirectLocation = "B.aspx"; but with no success too. Any hints? Thanks

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• ASP.NET MVC SSL POST Error

  - by RyanFetz

  I have a Logon page in a MVC (1.0) application that I am securing with SSL, I have an attribute that inspects the request for the page and redirects to a https uri when it is requested with http. This all works, however when I post the form content i get the following error: The parameters dictionary contains a null entry for parameter 'rememberMe' of non-nullable type 'System.Boolean' for method 'System.Web.Mvc.ActionResult LogOn(System.String, System.String, Boolean, System.String)' in 'DAC.US.Web.Portal.Controllers.AccountController'. To make a parameter optional its type should be either a reference type or a Nullable type. Parameter name: parameters here is the controller code... // // GET: /Account/LogOn [RequiresSSL] public ActionResult LogOn(string ReturnUrl) { if (TempData["Message"] != null) ViewData["Message"] = TempData["Message"]; TempData["Message"] = null; ViewData["ReturnUrl"] = ReturnUrl ?? "/Home"; return View(); } Again, the RequireSSL Attribute works, but the POST from that SSL uri does not. What is not working?

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