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  • How to get users to read error messages?

    - by FX
    If you program for a nontechnical audience, you find yourself at a high risk that users will not read your carefully worded and enlightening error messages, but just click on the first button available with a shrug of frustration. So, I'm wondering what good practices you can recommend to help users actually read your error message, instead of simply waiving it aside. Ideas I can think of would fall along the lines of: Formatting of course help; maybe a simple, short message, with a "learn more" button that leads to the longer, more detailed error message Have all error messages link to some section of the user guide (somewhat difficult to achieve) Just don't issue error messages, simply refuse to perform the task (a somewhat "Apple" way of handling user input) Edit: the audience I have in mind is a rather broad user base that doesn't use the software too often and is not captive (i.e., not an in-house software or narrow community). A more generic form of this question was asked on slashdot, so you may want to check there for some of the answers.

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  • Rails choking on the content of this request because of protect_from_forgery

    - by randombits
    I'm trying to simply test my RESTful API with cURL. Using the following invocation: curl -d "name=jimmy" -H "Content-Type: application/x-www-form-urlencoded" http://127.0.0.1:3000/people.xml -i Rails is dying though: ActionController::InvalidAuthenticityToken (ActionController::InvalidAuthenticityToken): :8:in `synchronize' Looks like it's running this through a protect_from_forgery filter. I thought protect_from_forgery is excluded for non-HTML HTTP POST/PUT/DELETE type requests? This is clearly targeting the XML format. If I pass actual XML content, it works. But my users will be submitting POST data as URL encoded parameters. I know all the various ways I can disable protect_from_forgery but what's the proper way of handling this? I want to leave it on so that when I do have HTML based forms and handle format.html, I don't forget to re-enable it for then. I want users to be able to make HTTP POST requests to my XML-based API though and not get bombarded with this.

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  • Random blank pages on Safari when developing webapp

    - by Ali
    Hey guys, I've been experiencing a safari problem while building a web application. The screen goes completely blank (white) and refreshing won't help. Going to another page on the site gives the same problem. Then magically, after a little while, everything goes back to normal and pages are rendered correctly! This started happening around the same time that I SUSPECT my hosting automatically upgraded from PHP 5.2.x to 5.3 (all of a sudden, we got 'deprecated function' errors and the error settings and handling were unchanged) I also have to mention that this doesn't happen in our dev environment (PHP 5.2.9, Apache 2) Settings Safari 4.0.2 and the latest one (don't know the version) Server side: PHP 5.3, MySQL 5.0.90, Apache is cPanel Easy Apache v3.2.0 Does anyone know why this is happening at all, or how to fix it? I appreciate any help or pointers you might have. Thanks!

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  • How are interrupts handled by dual processor machines?

    - by jeffD
    I have an idea of how interrupts are handled by a dual core CPU. I was wondering about how interrupt handling is implemented on a board with more than one physical processor. Is any of the interrupt responsibility determined by the physical board's configuration? Each processor must be able to handle some types of interrupts, like disk I/O. Unless there is some circuitry to manage and dispatch interrupts to the appropriate processor? My guess is that the scheme must be processor neutral, so that any processor and core can run the interrupt handler. If a core is waiting on a disk read, will that core be the one to run the interrupt handler when the disk is ready?

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  • Problem reading from the StandarOutput from ftp.exe. Possible System.Diagnostics.Process Framework b

    - by SoMoS
    Hello, I was trying some stuff executing console applications when I found this problem handling the I/O of the ftp.exe command that everybody has into the computer. Just try this code: m_process = New Diagnostics.Process() m_process.StartInfo.FileName = "ftp.exe" m_process.StartInfo.CreateNoWindow = True m_process.StartInfo.RedirectStandardInput = True m_process.StartInfo.RedirectStandardOutput = True m_process.StartInfo.UseShellExecute = False m_process.Start() m_process.StandardInput.AutoFlush = True m_process.StandardInput.WriteLine("help") MsgBox(m_process.StandardOutput.ReadLine()) MsgBox(m_process.StandardOutput.ReadLine()) MsgBox(m_process.StandardOutput.ReadLine()) MsgBox(m_process.StandardOutput.ReadLine()) This should show you the text that ftp sends you when you do that from the command line: Los comandos se pueden abreviar. Comandos: ! delete literal prompt send ? debug ls put status append dir mdelete pwd trace ascii disconnect mdir quit type bell get mget quote user binary glob mkdir recv verbose bye hash mls remotehelp cd help mput rename close lcd open rmdir Instead of that I'm getting the first line and 3 more with garbage, after that the call to ReadLine block like if there was no data available. Any hints about that?

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  • How to set WCF threads to schedual differently

    - by Gilad
    Hi, I'm running a winservice that has 2 main objectives. Execute/Handle exposed webmethods. Run Inner processes that consume allot of CPU. The problem is that when I execute many inner processes |(as tasks) that are queued to the threadpool or taskpool, the execution of the webmethods takes much more time as WCF also queues its executions to the same threadpool. This even happens when setting the inner processes task priority to lowest and setting the webmethods thread priority to heights. I hoped that Framework 4.0 would improve this, and they have, but still it takes quite allot of time for the system to handle the WCF queued tasks if the CPU is handling other inner tasks. Is it possible to change the Threadpool that WCF uses to a different one? Is it possible to manually change the task queue (global task queue, local task queue). Is it possible to manually handle 2 task queues that behave differently ? Any help in the subject would be appropriated. Gilad.

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  • How can I stop IIS7 from using HttpHandlers?

    - by mcintyre321
    I'm having a bit of a play around with IIS7, just trying to catch events manually in global.asax and skip the ASP pipeline entirely. To this end, I've set <httpHandlers> <clear/> </httpHandlers> <httpModules> <clear/> </httpModules> but when I call the server I get a YSOD [HttpException]: No http handler was found for request type 'GET' at System.Web.HttpApplication.MapHttpHandler(HttpContext context, String requestType, VirtualPath path, String pathTranslated, Boolean useAppConfig) at System.Web.HttpApplication.MapHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) What do I need to do to completely prevent IIS from handling things? What I want is just to do Response.Writes in event handlers and async methods set up in HttpApplication.Init

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  • cakephp site domain change, having 301 issues

    - by veryMickey
    I moved my cakephp site from a subdomain over to a different domain. I handled the permanent redirect in my htaccess file but in the redirect i am losing my neat/clean url handling. old site iphone.gameachievements.org new site gameachievements.org example of current redirect iphone.gameachievements.org/games/jungle-swing - gameachievements.org/index.php?url=games/jungle-swing what i want.. is iphone.gameachievements.org/games/jungle-swing - gameachievements.org/games/jungle-swing here is what my htaccess file looks like... RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^(.*)$ index.php?url=$1 [QSA,L] RewriteCond %{HTTP_HOST} iphone.gameachievements.org RewriteRule (.*) http://gameachievements.org/$1 [R=301,L] any help is appricated thanks m!

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  • What is inside Windows SDK?

    - by AKN
    For developing programs for windows, we need windows SDK. I understand that this SDK is what helps to create windows and handle window events and all that. I suppose it also enables us to manipulate with files and registries. (Does the same SDK is the reason for thread creation and handling?) All that is fine! I would like to know what are the files and libraries that come as a part of this SDK. Also does it come when I install the OS or when I install editors like Visual studio? Sometimes I see links to windows SDK separately as such. Is it same as the one that I get when installing Visual Studio or has something more than that.

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  • ASP.NET MVC Head Verb and Selenium RC

    - by Rob
    Selenium (RC) is being used to test an ASP.NET 1.1 site. When we make a request via Selenium RC (and then in turn via Firefox or other configured browser) the http verb is "HEAD". We have several form action methods that have separate POST and GET methods decorated with AcceptVerbs(HttpVerbs.Get). These methods are returning a 404 and logging a "a public action method could not be found" error message. Questions: When writing separate Get/Post action methods what is the best practice for handling the Head verb? Should we always decorate with an AcceptVerbs(HttpVerbs.Get | HttpVerbs.Head)? The only time we've seen HEAD verbs is from Selenium and from some crawlers. We created robots.txt entries for the crawlers. Does anyone know why HEAD verbs are issued via Selenium (instead of an If-Modified-Since header)? Are there mainstream crawlers that use the HEAD verb? Does it affect SEO ranking to not have it?

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  • EJB3 with Spring

    - by fish
    I have understood that if I use EJB in Spring context, I get all the same benefits as if I was using it in "pure" EJB3 environment, is this true? I have googled but can't find a definitive, clear answer. For example, let's say I have a session bean that updates some tables in the database and it throws a System Exception. In "pure" EJB3 environment the transaction is rolled back. What if I for example @Autowire this bean using Spring, does Spring take care of the transaction handling same way as does the EJB3 container? Or what? Does it maybe require some specific configuration or is it fully "automatic"?

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  • Can a CouchDB document update handler get an update conflict?

    - by jhs
    How likely is a revision conflict when using an update handler? Should I concern myself with conflict-handling code when writing a robust update function? As described in Document Update Handlers, CouchDB 0.10 and later allows on-demand server-side document modification. Update handlers can process non-JSON formats; but the other major features are these: An HTTP front-end to arbitrarily complex document modification code Similar code needn't be written for all possible clients—a DRY architecture Execution is faster and less likely to hit a revision conflict I am unclear about the third point. Executing locally, the update handler will run much faster and with lower latency. But in situations with high contention, that does not guarantee a successful update. Or does the update handler guarantee a successful update?

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  • Multi Action with Form design streatgy

    - by Ravi
    Hello All, I want to have a controller that can handle multiple requests. Like a UserController handling all the addUser, deleteUser, updateUser and viewUser functionality. I know that MultiActionController can be used to bundle multiple similar request into one controller. But the functionalities like addUser and updateUser involves user to enter data, which the controller need to process. Can a MultiActionController handle doSubmit kind of methods (similar to SimpleFormController). Is there any better way to handle this kind of scenario? Thanks. Ravi

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  • speed up a sql query to mysql?

    - by fayer
    in my mysql database i've got the geonames database, containing all countries, states and cities. i am using this to create a cascading menu so the user could select where he is from: country - state - county - city. but the main problem is that the query will search through all the 7 millions rows in that table each time i want to get the list of children rows, and that is taking a while 10-15 seconds. i wonder how i could speed this up: caching? table views? reorganizing table structure somehow? and most important, how do i do these things? are there good tutorials you could link to me? i appreciate all help and feedback discussing smart ways of handling this issue!

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  • No_data_found exception is progating in outer block also?

    - by Vineet
    In my code i am entering the salary which is not available in employees table and then again inserting duplicate employee_id in primary key column of employee table in exception block where i am handling no data found exception but i do not why 'No data found exception in the end also? OUTPUT coming: Enter some other sal ORA-01400: cannot insert NULL into ("SCOTT"."EMPLOYEES"."LAST_NAME") ORA-01403: no data found --This should not come according to logic This is the code DECLARE v_sal number:=&p_sal; v_num number; BEGIN BEGIN select salary INTO v_num from employees where salary=v_sal; EXCEPTION WHEN no_data_found THEN DBMS_OUTPUT.PUT_LINE('Enter some other sal'); INSERT INTO employees (employee_id)values(100) ; END; EXCEPTION WHEN OTHERS THEN DBMS_OUTPUT.PUT_LINE(sqlerrm); END;

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  • MVC Pattern Clarification

    - by Amutha
    Just I started learning MVC pattern,ofcourse i am learning it from Microsoft's website.Just i want to gather quiz information from the experts. My understanding is (correct me then and there) 1 ) MVC does not support server side events ,but supports client side events.if it supports client side events,i need html page with jQuery/Javascript (view),but most of the example i absorbed is to display the information(model) in view ,i did not see any client side event handling happens in view. 2) Except ViewState and controlState,MVC supports Sessions,Application State management,Cache management. 3) When request goes to MVC engine ,the routing module routes the request that is picked up by the controller.The controller in executes the appropriate action and return the appropriate view.

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  • Parsing complex string using regex

    - by wojtek_z
    My regex skills are not very good and recently a new data element has thrown my parser into a loop Take the following string "+USER=Bob Smith-GROUP=Admin+FUNCTION=Read/FUNCTION=Write" Previously I had the following for my regex : [+\\-/] Which would turn the result into USER=Bob Smith GROUP=Admin FUNCTION=Read FUNCTION=Write FUNCTION=Read But now I have values with dashes in them which is causing bad output New string looks like "+USER=Bob Smith-GROUP=Admin+FUNCTION=Read/FUNCTION=Write/FUNCTION=Read-Write" Which gives me the following result , and breaks the key = value structure. USER=Bob Smith GROUP=Admin FUNCTION=Read FUNCTION=Write FUNCTION=Read Write Can someone help me formulate a valid regex for handling this or point me to some key / value examples. Basically I need to be able to handle + - / signs in order to get combinations.

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  • Winforms web browser control not firing document complete with AJAX web site.

    - by ajl
    The VB.Net desktop app uses the IE browser control to navigate the web. When a normal page loads the document_complete event fires and I can read the resulting page and go from there. The issue I am having is that the page I am driving is written with AJAX, so the document complete event never fires. Furthermore, when you view the source of the page after it loaded a new portion via AJAX, it hasn't change. How are people handling this? What are my options?

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  • Delphi-5 single-file storage solution?

    - by pastacool
    Hi! Is there a Delphi-5 solution to easily integrate single-file storage into existing code? I would like to have files like Java *.jar or Openoffice document files which are zipped/compressed files and folders but with their own file extension. Edit: I know some ZIP capable components but in a nutshell I want to access files within the "container" and use normal file handling routines on them (eg. TStringList.SaveToFile). Any overhead about compress/uncompress should be handled by the component.

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  • Cleanup for control inside a FlowDocument

    - by Thorarin
    I have a custom control that I use inside a FlowDocument. The control uses a System.Drawing.ImageAnimator to display transparent, animated GIF images. Why is this such a pain in the butt in WPF anyway? :P In my original implementation, this was causing memory leaks when a paragraph containing the control was being deleted from the document, because the ImageAnimator kept a reference to the control for event handling. I've now implemented a WeakEventManager pattern which seems to indeed fix the leak itself, but I would like to stop "OnFrameChanged" events from being fired if a particular animated GIF is not currently in the document, instead of relying on the garbage collector to eventually collect the control objects and my event manager to notice that there no longer are valid listeners to the event. Basically, I would like to take a more active role in this and have the control react to being removed from the FlowDocument. Is there some way to do this? I've been unable to find it. OnVisualParentChanged doesn't get fired, because the direct parent (a Paragraph) is unchanged.

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  • dotnet nuke error

    - by donfigga
    Hi there im trying to degub a dot net nuke server error and im not sure where to start. I dnt have the code locally else I could debug (no that im familiar the dnn setup). This bug affects making cms updates to the site with the message 'A critical error has occured', I have been unsuccessfully trying to find out the cause and im finally throwing up my hands, I dont even need a fix , I just want to find out what is causing the error so I can provide an estimate for a fix and I can even seem to do that. I have tried looking at the logs but nothing seems to be logged about this error, is there a way to turn off custom error handling so as to get some clues as what the cause of this bug is? any suggestions would be welcome as i am getting desperate here :)

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  • dojo parser not escaping quotation marks in attributes?

    - by peirix
    Whenever I'm using quotation marks inside an attribute value in dojo, it seems dojo's parser isn't handling it very well... <textarea name="content.locale['en']" dojoType="dijit.form.SimpleTextarea"> </textarea> Turns into: <textarea ]="" en="" name="content.locale["></textarea> With the surrounding <div>s and what not is added by the dijit widget. Any ideas? EDIT Seems this is working as it should with other elements, it's just the SimpleTextarea that's causing a problem..

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  • Does it make sense to have more than one UDP Datagram socket on standby? Are "simultaneous" packets

    - by Gubatron
    I'm coding a networking application on Android. I'm thinking of having a single UDP port and Datagram socket that receives all the datagrams that are sent to it and then have different processing queues for these messages. I'm doubting if I should have a second or third UDP socket on standby. Some messages will be very short (100bytes or so), but others will have to transfer files. My concern is, will the Android kernel drop the small messages if it's too busy handling the bigger ones? Update "The latter function calls sock_queue_rcv_skb() (in sock.h), which queues the UDP packet on the socket's receive buffer. If no more space is left on the buffer, the packet is discarded. Filtering also is performed by this function, which calls sk_filter() just like TCP did. Finally, data_ready() is called, and UDP packet reception is completed."

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  • No_data_found exception is propagating to outer block also?

    - by Vineet
    In my code i am entering the salary which is not available in employees table and then again inserting duplicate employee_id in primary key column of employee table in exception block where i am handling no data found exception but i do not why No data found exception in the end also? OUTPUT coming: Enter some other sal ORA-01400: cannot insert NULL into ("SCOTT"."EMPLOYEES"."LAST_NAME") ORA-01403: no data found --This should not come according to logic This is the code: DECLARE v_sal number:=&p_sal; v_num number; BEGIN BEGIN select salary INTO v_num from employees where salary=v_sal; EXCEPTION WHEN no_data_found THEN DBMS_OUTPUT.PUT_LINE('Enter some other sal'); INSERT INTO employees (employee_id)values(100) ; END; EXCEPTION WHEN OTHERS THEN DBMS_OUTPUT.PUT_LINE(sqlerrm); END;

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  • Why darcs instead of git?

    - by Ctrl Alt D-1337
    Using pure functional languages can have a lot of benefits over using impure imperatives but low level systems languages will generally allow you to achieve much greater performance especially when they are imperative because it allows you to specify the exact steps in how the cpu should compute the result. If there is ever list of tools where high performance is an absolute must then I would put source version controls systems right at the top of that list and git achieves this very well but performance is not it's only advantage over many other other types of version control systems anyway. The git team are handling the unsafe c code very well and I never worry about my type system or any other features of the language it is written in so why is it that there is a lot of haskell developers that must use darcs when they will only be using the finished product?

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