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• SSL on Heroku / User Authentication Across Multiple Domains

  - by Euwyn

  Posted a previous question on this, but have a followup. I was trying to create a workaround to use SSL on the expensive custom domain. I'm willing to live with bumping a user to https://app.heroku.com from http://www.app.com for certain secure pages, and have monkey-patched SSL required to make this happen. However, now this issue is with making sure my User is logged in when I do so. As I understand, cookies aren't cross domain. Is there a way around this issue?

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• VB.NET: How to know time for which system is idle?

  - by Daredev

  I'm making an application in which I'm implementing auto-monitor turn off when system is idle, i.e. when user is not interacting with the system. I found a link: http://www.codeproject.com/KB/system/SystemIdleTimerComponent.aspx it does provides the componenent to know when system is idle. But when I include: Public WM_SYSCOMMAND As Integer = &H112 Public SC_MONITORPOWER As Integer = &Hf170 <DllImport("user32.dll")> _ Private Shared Function SendMessage(hWnd As Integer, hMsg As Integer, wParam As Integer, lParam As Integer) As Integer End Function Private Sub button1_Click(sender As Object, e As System.EventArgs) SendMessage(Me.Handle.ToInt32(), WM_SYSCOMMAND, SC_MONITORPOWER, 2) End Sub It shows this error: Cross-thread operation not valid: Control 'Form1' accessed from a thread other than the thread it was created on.

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• ASP.Net MVC ReturnUrl Practice

  - by Terry

  I have a question about the returnUrl querystring parameter that is appended by ASP.Net when attempted to hit a page that requires authentication. In looking at Microsoft NerdDinner Sample's LogOn action (along with every other 'sample authentication code' I see on the 'net), it just has the ReturnUrl parameter declared in the action's signature and uses it directly in a Redirect() call. However, back in the WebForms days and using Membership Controls, we use to use the FormsAuthentication.GetReturnUrl() call. Besides returning the 'default url' if no url was specified in the querystring, it also does a few security checks (Cross App Redirect and 'IsDangerousUrl()'). Are those no longer a concern or are all the sample 'log on' actions I'm seeing all over the 'net just ignoring those issues?

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• Saving Multiple Annotations -NSUserDefaults

  - by casillas

  I came cross this code as shown below.In the following code, I could able to save only one single annotation, however I have an array of annotations, I could not able to save them with single NSUserDefaults To save: NSUserDefaults *ud = [NSUserDefaults standardUserDefaults]; [ud setDouble:location.latitude forKey:@"savedCoordinate-latitude"]; [ud setDouble:location.longitude forKey:@"savedCoordinate-longitude"]; [ud setBool:YES forKey:@"savedCoordinate-exists"]; [ud synchronize]; Edited: -(void)viewDidLoad NSUserDefaults *ud=[NSUserDefaults standardUserDefaults]; if([ud boolForKey:@"save-exist"]) { NSMutableArray *udAnnotations=[[NSMutableArray alloc]initWithArray: [ud objectForKey:@"annotationsArray"]]; NSLog(@"%d",[udAnnotations count]); } else{ [self addAnno]; } -(void)addAnno { [mapView addAnnotations:annotationArray]; NSUserDefaults *ud=[NSUserDefaults standardUserDefaults]; [ud setObject:annotationArray forKey:@"annotationsArray"]; [ud setBool:YES forKey:@"save-exist"]; [ud synchronize]; }

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• PageMethods security

  - by TenaciousImpy

  Hi, I'm trying to 'AJAX-ify' my site in order to improve the UI experience. In terms of performance, I'm also trying to get rid of the UpdatePanel. I've come across a great article over at Encosia showing a way of posting using PageMethods. My question is, how secure are page methods in a production environment? Being public, can anyone create a JSON script to POST directly to the server, or are there cross-domain checks taking place? My PageMethods would also write the data into the database (after filtering). I'm using Forms Authentication in my pages and, on page load, it redirects unauthenticated users to the login page. Would the Page Methods on this page also need to check authentication if the user POSTs directly to the method, or is that authentication inherited for the entire page? (Essentially, does the entire page cycle occur even if a user has managed to post only to the PageMethod)? Thanks

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• Get seconds since epoch in any POSIX compliant shell

  - by mattbh

  I'd like to know if there's a way to get the number of seconds since the UNIX epoch in any POSIX compliant shell, without resorting to non-POSIX languages like perl, or using non-POSIX extensions like GNU awk's strftime function. Here are some solutions I've already ruled out... date +%s // Doesn't work on Solaris I've seen some shell scripts suggested before, which parse the output of date then derive seconds from the formatted gregorian calendar date, but they don't seem to take details like leap seconds into account. GNU awk has the strftime function, but this isn't available in standard awk. I could write a small C program which calls the time function, but the binary would be specific to a particular architecture. Is there a cross platform way to do this using only POSIX compliant tools? I'm tempted to give up and accept a dependency on perl, which is at least widely deployed. perl -e 'print time' // Cheating (non-POSIX), but should work on most platforms

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• Insert a Script into a iFrame's Header, without clearing out the body of the iFrame

  - by nobosh

  Hello, I'm looking to add a script to an iFrame's header while not losing everything contained in the iFrame's body or header... here is what I have right now which does update the iFrame with the new script, but it cleans everything in the iframe out, not appends which is what I'd like. thxs! B // Find the iFrame var iframe = document.getElementById('hi-world'); // create a string to use as a new document object var val = '<scr' + 'ipt type="text/javascript" src="http://jqueryjs.googlecode.com/files/jquery-1.3.2.min.js"></scr' + 'ipt>'; // get a handle on the <iframe>d document (in a cross-browser way) var doc = iframe.contentWindow || iframe.contentDocument; if (doc.document) { doc = doc.document;} // open, write content to, and close the document doc.open(); doc.write(val); doc.close();

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• Perl: Event-driven Programming

  - by Shiftbit

  Is there any POSIX signals that I could utilize in my perl program to create event-driven programming? Currently I have multi-process program that is able to cross communicate but my parent thread is only able to listen to listen at one child at a time. foreach (@threads) { sysread(${$_}{'read'}, my $line, 100); chomp($line); print "Parent hears: $line\n"; } The problem is that the parent sits in a continual wait state until it receives it a signal from the first child before it can continue on. I am relying on 'pipe' for my intercommunication. My current solution is very similar to: http://stackoverflow.com/questions/2558098/how-can-i-use-pipe-to-facilitate-interprocess-communication-in-perl If possible I would like to rely on a $SIG{...} event or any non-CPAN solution.

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• JQuery: Problem in getting element's width in Chrome

  - by Sarfraz

  Hello, Suppose I have this image: <img src="images/01.jpg" border="0" rel="shadow" /> Then with JQuery, I get its width using: $('[rel="shadow"]').width(); Firefox and IE report correct dimensions of the image eg 140px while Chrome reports 0. How to solve this problem? Note: I don't want to set explicit width for images eg: <img src="images/01.jpg" border="0" rel="shadow" width="140" /> So, how to get width in cross-browser way which is not defined in width attribute of elements? Thanks

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• Using jQuery.getJSON in Chrome Extension

  - by Paul Tarjan

  I need to do a cross-domain request in a chrome extension. I know I can it via message passing but I'd rather stick to just jQuery idioms (so my javascript can also work as a <script src="">). I do the normal: $.getJSON("http://api.flickr.com/services/feeds/photos_public.gne?tags=cat&tagmode=any&format=json&jsoncallback=?", callback(function(data) { alert(data); }); but in the error console I see: Uncaught ReferenceError: jsonp1271044791817 is not defined Is jQuery not inserting the callback function correctly into the document? What can I do to make this work?

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• Flex - How to call a webservice without crossdomain.xml file

  - by Stephane Grenier

  How can I consume a webservice that hasn't explicitely created a crossdomain.xml? I understand it's for security and to prevent cross-site scripting, but it does seem like a major limitation to the Flex framework. For example, if I want to consume a webservice, which is suppose to be language agnostic, then I can't with Flex. The webservice/server has to be specifically prepared for Flex/Flash. If it's not, then it cannot be consumed. That can't be right can it?

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• How can I dispatch an PropertyChanged event from a subscription to an Interval based IObservable

  - by James Hay

  I'm getting an 'UnauthorizedAccesExpection - Invalid cross-thread access' exception when I try to raise a PropertyChanged event from within a subscription to an IObservable collection created through Observable.Interval(). With my limited threading knowledge I'm assuming that the interval is happening on some other thread while the event wants to happen on the UI thread??? An explanation of the problem would be very useful. The code looks a little like: var subscriber = Observable.Interval(TimeSpan.FromSeconds(1)) .Subscribe(x => { Prop = x; // setting property raises a PropertyChanged event }); Any solutions?

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• Is there anything RAD comparible to VCL?

  - by mawg

  After years in embedded programmking, I have to develop a windows app. I dug out my old C++ builder and Delphi. These are great and the latest version costs over $1k, so I won't be going there. What I prarticularly like is the VCL (visual component library) which let's me code my own components and share them with others, plus the thousands of existing 3rd party components. I noticed that there is now also a RAD PHP form Borland too. I realzie that MSVC, QT, NetBEans, etc are good enough IDEs for RAD, _BUT_ does anything offer the ease of the Borland products for developing additional components - and does anything else have thousands to choose from? PC based? Cross-platform is good. Browser based? Free is always good ;-) I don't particularly care about the programming language.

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• Best practices for organizing .NET P/Invoke code to Win32 APIs

  - by Paul Sasik

  I am refactoring a large and complicated code base in .NET that makes heavy use of P/Invoke to Win32 APIs. The structure of the project is not the greatest and I am finding DllImport statements all over the place, very often duplicated for the same function, and also declared in a variety of ways: The import directives and methods are sometimes declared as public, sometimes private, sometimes as static and sometimes as instance methods. My worry is that refactoring may have unintended consequences but this might be unavoidable. Are there documented best practices I can follow that can help me out? My instict is to organize a static/shared Win32 P/Invoke API class that lists all of these methods and associated constants in one file... (The code base is made up of over 20 projects with a lot of windows message passing and cross-thread calls. It's also a VB.NET project upgraded from VB6 if that makes a difference.)

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• Canonical Link as a Way of Fighting Scrapers?

  - by James D

  Hi, Let's say several external sites are scraping/harvesting your content and posting it as their own. Let's also say that you maintain a single unique/permanent URL for each piece of content, so that content aliasing (on your site) is never an issue. Is there any value from an SEO perspective to including a canonical link in your header anyway, such that when your site is "scraped", the canonical indication is injected into whatever site is stealing your content (assuming they harvest the raw HTML rather than going in through RSS etc.)? I've heard different things about the behavior of cross-site canonical links, from "they're ignored" to "behavior undefined" to "it can't hurt" to "sure that's exactly what canonical is intended for". My impression was that canonical was a good way of dealing with intra-site but not necessarily inter-site aliasing. Thanks~

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• Algorithm question.

  - by Lukasz Lew

  I can't solve it: You are given 8 integers: A, B, C representing a line on a plane with equation A*x + B*y = C a, b, c representing another line x, y representing a point on a plane The two lines are not parallel therefore divide plane into 4 pieces. Point (x, y) lies inside of one these pieces. Problem: Write a fast algorithm that will find a point with integer coordinates in the same piece as (x,y) that is closest to the cross point of the two given lines. Note: This is not a homework, this is old Euler-type task that I have absolutely no idea how to approach.

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• Performance Testing Versus Unit Testing

  - by Mystagogue

  I'm reading Osherove's "The Art of Unit Testing," and though I've not yet seen him say anything about performance testing, two thoughts still cross my mind: Performance tests generally can't be unit tests, because performance tests generally need to run for long periods of time. Performance tests generally can't be unit tests, because performance issues too often manifest at an integration or system level (or at least the logic of a single unit test needed to re-create the performance of the integration environment would be too involved to be a unit test). Particularly for the first reason stated above, I doubt it makes sense for performance tests to be handled by a unit testing framework (such as NUnit). My question is: do my findings / leanings correspond with the thoughts of the community?

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• Tools to test softwares against any attacks for programmers ?

  - by berkay

  in these days, i'm interested in software security. As i'm reading papers i see that there are many attacks and researchers are trying to invent new methods for softwares to get more secure systems. this question can be a general including all types of attacks.There are many experienced programmers in SO, i just want to learn what are using to check your code against these attacks ? Is there any tools you use or you don't care ? For example i heard about,static,dynamic code analysis, fuzz testing. SQL injection attacks Cross Site Scripting Bufferoverflow attacks Logic errors Any kind of Malwares Covert Channels ... ... thanks

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• Crossdomain TinyMCE

  - by pistacchio

  Hi, folling this discussion and this link, I learnt that by adding document.domain = 'mydomain.com'; to the tinyMCE initializer file and tiny_mce_popup.js i can overcome the cross domain problem. I haven't tested it on a proper production server, but in my dev environment the base domain is localhost:8000 and my static files (also tinyMCE ones) are on localhost:88. Adding document.domain = 'localhost:8000'; or document.domain = 'localhost:88'; doesn't solve the problem as I get the following error: Uncaught Error: SECURITY_ERR: DOM Exception 18 Any help? Thanks

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• Tool to Create Annotated Directory Structure Documentation

  - by Millhouse

  I've got a moderately complicated application that has been developed primarily by me, and I'm getting ready to bring a few more developers in, and I'm thinking of various forms of documentation that might be helpful. I want to communicate information about the directory structure/layout of the project so the new guys will know where to look for things when they are getting started and as they add features, know where to put new files etc., so we can keep things organized and consistent. Is there any tool out there can create something a little more sophisticated than just a plain text document? I'm thinking of something that looks similar to Windows Explorer with a directory structure on the left in a panel and then when you click on a particular folder, you would be able to view some text or HTML that describes the folder in the right hand panel. Oh, and development will be done on Windows, but cross platform would be nice.

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• Detecting your application's install path in Java?

  - by Danny King

  Hi, I have made a small application in Java and I would like to make a windows installer for it using the Nullsoft Scriptable Install System (http://nsis.sourceforge.net/Main_Page). The application I made needs to save user preferences somewhere and it currently saves it in the user's home directory (e.g. c:\Users\danny or /home/users/danny). However if the windows installer installs the application to e.g. c:\Program Files\whatever\ I should probably save the preferences file there too, right? How would I detect that directory path in Java? What would be a good cross-platform approach to this without losing the benefits of a windows uninstaller for windows users e.g. start menu icons, installer option, etc? Should I just continue saving my preferences in the user's home path and clutter it up? Thanks very much,

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• Asynchronous Silverlight WCF callback

  - by Matt

  I've created my own WCF service and I've successfully been able to talk to it via my Silverlight client. I ran into an interesting problem on my asynchronous callbacks though. When my callback is invoked, I can't update any UI controls with the dreaded invalid cross thread access Here's what my callback function looks like private void GetTimeCallBack( object sender, Talk.ClientBase<IService>.ClientEventArgs e ) { lblDisplay.Text = e.Object.ToString(); } A quick google search showed me that I have to do this instead. private void GetTimeCallBack( object sender, Talk.ClientBase<IService>.ClientEventArgs e ) { Dispatcher.BeginInvoke( () => lblDisplay.Text = e.Object.ToString() ); } Now everything works fine, but I wasn't expecting my callback to be running on a different thread. Will I always have to use the Dispatcher class in order to modify anything within my class or is this just limited to UI elements? I've not familiar with the Dispatcher class at all so I'm looking to understand it more.

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• Marshal struct to unmanaged array

  - by Pedro

  Hi guys, I have a C# struct to represent a cartesian vector, something like this: public struct Vector { private double x; private double y; private double z; //Some properties/methods } Now I have an unmanaged C dll that I need to call with P/Invoke. Some methods expect a double[3] parameter. The unmanaged C signature is something like void Cross(double a[3], double b[3], double c[3]); Is there any way to set up a P/Invoke signature so I can pass instances of my Vector struct and marshal them transparently to unmanaged double[3]? I would also need bidirectional marshaling as the unmanaged function needs to write the output to the argument array, so I guess I would need to marshal as LpArray. Any ideas? Thanks Pedro

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• Reading file resource in Unix and MacOS

  - by Sanjeev

  Hi, I am writing my first wxWidgets application which aims to be cross-platform. The program uses dll file for plugins and in Windows, reads dll resource part for information regarding plugin name, author name etc. I have never used Unix or MacOS (little Linux though) and am wondering whether compiling binary for these other OSes will require changes to the code written for Windows. For instance, is there a DLL equivalent in Unix and MacOS? Are there any provisions of compiling resource strings and files into a such files? Thanks, Sanjeev

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• Server Push / HTTP Streaming on Windows Mobile / Windows CE

  - by afriza

  Hi, I find that HTTP Streaming / Server Push is quite promising for my project. Does someone have any clue on how to implement this in Windows Mobile? .NET / Native / other implementations are welcomed. Preferably with permissive license. some links on HTTP Steaming / Server Push: - Push Technology - Streaming HTTP / Server Push - Cross-browser implementation of “HTTP Streaming” (push) AJAX pattern - XEP-0124: Bidirectional-streams Over Synchronous HTTP (BOSH) I was thinking of using some Qt XMPP library (QXmpp) to do the job, but I'm not sure if it's up for the task and I also want to hear some opinions on this.

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