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• Code Golf: Tic Tac Toe

  - by Aistina

  Post your shortest code, by character count, to check if a player has won, and if so, which. Assume you have an integer array in a variable b (board), which holds the Tic Tac Toe board, and the moves of the players where: 0 = nothing set 1 = player 1 (X) 2 = player 2 (O) So, given the array b = [ 1, 2, 1, 0, 1, 2, 1, 0, 2 ] would represent the board X|O|X -+-+- |X|O -+-+- X| |O For that situation, your code should output 1 to indicate player 1 has won. If no-one has won you can output 0 or false. My own (Ruby) solution will be up soon. Edit: Sorry, forgot to mark it as community wiki. You can assume the input is well formed and does not have to be error checked. Update: Please post your solution in the form of a function. Most people have done this already, but some haven't, which isn't entirely fair. The board is supplied to your function as the parameter. The result should be returned by the function. The function can have a name of your choosing.

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• Connecting a DomainContext and loading data manually in Silverlight 4 RC application

  - by Redburn

  I am new to WCF & RIA services and have what seems like a basic problem. I have multiple times in my silverlight 4 RC application dragged and dropped from my datasource window to my form and have returned information from the database. However I have a need to query the database for other information (Building a report) When I try to use the following code, I recieve no error, but I also do not get any information back from the service. //Global public UMSDomainContext _umsDomainContext = new UMSDomainContext(); //In the Initialization portion _umsDomainContext.Load(_umsDomainContext.GetUMOptionsQuery()); //Queries var name = from n in _umsDomainContext.UMOptions select n.DistrictName; var street1 = from c in _umsDomainContext.UMOptions select c.Address1; var street2 = from c in _umsDomainContext.UMOptions select c.Address2; var city = from c in _umsDomainContext.UMOptions select c.City; var zip = from c in _umsDomainContext.UMOptions select c.Zip; Im calling the current additional assem. using System.Linq; using System.ServiceModel.DomainServices.Client; using System.ComponentModel.DataAnnotations; using MTT.Web;

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• How would the conversion of a custom CMS using a text-file-based database to Drupal be tackled?

  - by James Morris

  Just today I've started using Drupal for a site I'm designing/developing. For my own site http://jwm-art.net I wrote a user-unfriendly CMS in PHP. My brief experience with Drupal is making me want to convert from the CMS I wrote. A CMS whose sole method (other than comments) of automatically publishing content is by logging in via SSH and using NANO to create a plain text file in a format like so*: head<<END_HEAD title = Audio keywords= open,source,audio,sequencing,sampling,synthesis descr = Music, noise, and audio, created by James W. Morris. parent = home END_HEAD main<<END_MAIN text<<END_TEXT Digital music, noise, and audio made exclusively with @=xlink=http://www.linux-sound.org@:Linux Audio Software@_=@. END_TEXT image=gfb@--@;Accompanying image for penonpaper-c@right ilink=audio_2008 br= ilink=audio_2007 br= ilink=audio_2006 END_MAIN info=text<<END_TEXT I've been making PC based music since the early nineties - fortunately most of it only exists as tape recordings. END_TEXT ( http://jwm-art.net/dark.php?p=audio - There's just over 400 pages on there. ) *The jounal-entry form which takes some of the work out of it, has mysteriously broken. And it still required SSH access to copy the file to the main dat dir and to check I had actually remembered the format correctly and the code hadn't mis-formatted anything (which it always does). I don't want to drop all the old content (just some), but how much work would be involved in converting it, factoring into account I've been using Drupal for a day, have not written any PHP for a couple of years, and have zero knowledge of SQL? How might a team of developers tackle this? How do-able is it for one guy in his spare time?

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• x86 instruction encoding tables

  - by Cheery

  I'm in middle of rewriting my assembler. While at it I'm curious about implementing disassembly as well. I want to make it simple and compact, and there's concepts I can exploit while doing so. It is possible to determine rest of the x86 instruction encoding from opcode (maybe prefix bytes are required too, a bit). I know many people have written tables for doing it. I'm not interested about mnemonics but instruction encoding, because it is an actual hard problem there. For each opcode number I need to know: does this instruction contain modrm? how many immediate fields does this instruction have? what encoding does an immediate use? is the immediate in field an instruction pointer -relative address? what kind of registers does the modrm use for operand and register fields? sandpile.org has somewhat quite much what I'd need, but it's in format that isn't easy to parse. Before I start writing and validating those tables myself, I decided to write this question. Do you know about this kind of tables existing somewhere? In a form that doesn't require too much effort to parse.

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• Universal Authentication to Google Data API?

  - by viatropos

  Hey, I want to be able to have say 10 admin users store all their documents on google docs for a domain ('http://docs.google.com/a/domain.com'), and have everyone else be able to view them through 'domain.com/documents'. I'm just not certain how the whole authentication thing works in that case. Should I use OAuth? Or could I just use ClientLogin for say the root/global admin, and anytime someone goes to the site, they login as that? That works for personal docs, but it doesn't seem to be working for Google Apps. I would like it so the user has no idea they're accessing google docs, so I don't want them to have to say "Yes, Authenticate this App with Google", as seen in this Doclist Manager App. The app is basically: Admin stores a bunch of forms and documents User uses form and views documents the admin has posted ... so there's no need to access the user's Google Docs. But it seems like AuthSub and OAuth are addressing that instead... Thanks for the tips.

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• ASP.NET MVC: what mechanic returns ViewModel objects?

  - by Dr. Zim

  As I understand it, Domain Models are classes that only describe the data (aggregate roots). They are POCOs and do not reference outside libraries (nothing special). View models on the other hand are classes that contain domain model objects as well as all the interface specific objects like SelectList. A ViewModel includes using System.Web.Mvc;. A repository pulls data out of a database and feeds them to us through domain model objects. What mechanic or device creates the view model objects, populating them from a database? Would it be a factory that has database access? Would you bleed the view specific classes like System.Web.Mvc in to the Repository? Something else? For example, if you have a drop down list of cities, you would reference a SelectList object in the root of your View Model object, right next to your DomainModel reference: public class CustomerForm { public CustomerAddress address {get;set;} public SelectList cities {get;set;} } The cities should come from a database and be in the form of a select list object. The hope is that you don't create a special Repository method to extract out just the distinct cities, then create a redundant second SelectList object only so you have the right data types.

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• Code for decoding/encoding a modified base64 URL

  - by Kirk Liemohn

  I want to base64 encode data to put it in a URL and then decode it within my HttpHandler. I have found that Base64 Encoding allows for a '/' character which will mess up my UriTemplate matching. Then I found that there is a concept of a "modified Base64 for URL" from wikipedia: A modified Base64 for URL variant exists, where no padding '=' will be used, and the '+' and '/' characters of standard Base64 are respectively replaced by '-' and '_', so that using URL encoders/decoders is no longer necessary and has no impact on the length of the encoded value, leaving the same encoded form intact for use in relational databases, web forms, and object identifiers in general. Using .NET I want to modify my current code from doing basic base64 encoding and decoding to using the "modified base64 for URL" method. Has anyone done this? To decode, I know it starts out with something like: string base64EncodedText = base64UrlEncodedText.Replace('-', '+').Replace('_', '/'); // Append '=' char(s) if necessary - how best to do this? // My normal base64 decoding now uses encodedText But, I need to potentially add one or two '=' chars to the end which looks a little more complex. My encoding logic should be a little simpler: // Perform normal base64 encoding byte[] encodedBytes = Encoding.UTF8.GetBytes(unencodedText); string base64EncodedText = Convert.ToBase64String(encodedBytes); // Apply URL variant string base64UrlEncodedText = base64EncodedText.Replace("=", String.Empty).Replace('+', '-').Replace('/', '_'); I have seen the Guid to Base64 for URL StackOverflow entry, but that has a known length and therefore they can hardcode the number of equal signs needed at the end.

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• 2 questions. IDO mode not caching properly / forcing buffers to named windows.

  - by user112043

  1 My ido mode does not properly cache filenames / folders. It will list files inside a folder, but from a while ago without any of the newer files showing. Any suggestions ? 2 In jde, when I have multiple windows open, compiling on one window will create a corresponding "* name of the class *" that will open on the next window in order. This is fine if I only have one window open but can I get some help writing a function that I could use to : Name a window Force all buffers of JDE compile server to only ever open in that window if it exists Force all run windows from jde in the form of * name of the class * to open in the same window if it exists. Jde automatically names the buffer " * name of the class * ", I will probably dig around the codes to find an easy fix for that... so if the code could just force all windows using a regexp containing * jde run - filename * or something along the lines would also work. Thanks for your help, first post here as well. I really would like just some ideas on what may be going wrong with 1, 2 if anyone is feeling kind.

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• General Question About WPF Control Behavior and using Invoke

  - by Phil Sandler

  I have been putting off activity on SO because my current reputation is "1337". :) This is a question of "why" and not "how". By default, it seems that WPF does not set focus to the first control in a window when it's opening. In addition, when a textbox gets focus, by default it does not have it's existing text selected. So basically when I open a window, I want focus on the first control of the window, and if that control is a textbox, I want it's existing text (if any) to be selected. I found some tips online to accomplish each of these behaviors, and combined them. The code below, which I placed in the constructor of my window, is what I came up with: Loaded += (sender, e) => { MoveFocus(new TraversalRequest(FocusNavigationDirection.Next)); var textBox = FocusManager.GetFocusedElement(this) as TextBox; if (textBox != null) { Action select = textBox.SelectAll; //for some reason this doesn't work without using invoke. Dispatcher.Invoke(DispatcherPriority.Loaded, select); } }; So, my question. Why does the above not work without using Dispatcher.Invoke? Is something built into the behavior of the window (or textbox) cause the selected text to be de-selected post-loading? Maybe related, maybe not--another example of where I had to use Dispatcher.Invoke to control the behavior of a form: http://stackoverflow.com/questions/2602979/wpf-focus-in-tab-control-content-when-new-tab-is-created

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• Proper use of HTTP status codes in a "validation" server

  - by Romulo A. Ceccon

  Among the data my application sends to a third-party SOA server are complex XMLs. The server owner does provide the XML schemas (.xsd) and, since the server rejects invalid XMLs with a meaningless message, I need to validate them locally before sending. I could use a stand-alone XML schema validator but they are slow, mainly because of the time required to parse the schema files. So I wrote my own schema validator (in Java, if that matters) in the form of an HTTP Server which caches the already parsed schemas. The problem is: many things can go wrong in the course of the validation process. Other than unexpected exceptions and successful validation: the server may not find the schema file specified the file specified may not be a valid schema file the XML is invalid against the schema file Since it's an HTTP Server I'd like to provide the client with meaningful status codes. Should the server answer with a 400 error (Bad request) for all the above cases? Or they have nothing to do with HTTP and it should answer 200 with a message in the body? Any other suggestion? Update: the main application is written in Ruby, which doesn't have a good xml schema validation library, so a separate validation server is not over-engineering.

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• iText PDFReader Extremely Slow To Open

  - by Wbmstrmjb

  I have some code that combines a few pages of acro forms (with acrofields in tact) and then at the end writes some JS to the entire document. It is the PdfReader in the function adding the JS that is taking extremely long to instantiate (about 12 seconds for a 1MB file). Here is the code (pretty simple): public static byte[] AddJavascript(byte[] document, string js) { PdfReader reader = new PdfReader(new RandomAccessFileOrArray(document), null); MemoryStream msOutput = new MemoryStream(); PdfStamper stamper = new PdfStamper(reader, msOutput); PdfWriter writer = stamper.Writer; writer.AddJavaScript(js); stamper.Close(); reader.Close(); byte[] withJS = msOutput.GetBuffer(); return withJS; } I have benchmarked the above and the line that is slow is the first one. I have tried reading it from a file instead of memory and tried using a MemoryStream instead of the RandomAccessFileOrArray. Nothing makes it any faster. If I add JS to a single page document, it is very fast. So my thought is that the code that combines the pages is somehow making the PDF slow to read for the PdfReader. Here is the combine code: public static byte[] CombineFiles(List<byte[]> sourceFiles) { MemoryStream output = new MemoryStream(); PdfCopyFields copier = new PdfCopyFields(output); try { output.Position = 0; foreach (var fileBytes in sourceFiles) { PdfReader fileReader = new PdfReader(fileBytes); copier.AddDocument(fileReader); } } catch (Exception exception) { //throw } finally { copier.Close(); } byte[] concat = output.GetBuffer(); return concat; } I am using PdfCopyFields because I need to preserve the form fields and so cannot use the PdfCopy or PdfSmartCopy. This combine code is very fast (few ms) and produces working documents. The AddJS code above is called after it and the PdfReader open is the slow piece. Any ideas?

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• Paperclip wont save image in rails app

  - by Micke

  Hello stackoverflow. I am trying to use Paperclip with my rails app to add an avatar to a user but it wont save my image when creating the user. This is what the model looks like: class User < ActiveRecord::Base has_attached_file :avatar And the registerform in haml: - form_for :user, @user, :url => { :action => "signup" }, :html => { :multipart => true } do |f| ... ... %li %div{:class => "header"} Profilepicture %div{:class => "input"} = f.file_field :avatar And when i look in the log this is what is being passet to the "signup" action: Parameters: {"commit"=>"Save", "action"=>"signup", "controller"=>"user/register", "user"=>{"name"=>"Micke Lisinge", "birthmonth"=>"07", "password_confirmation"=>"[FILTERED]", "nickname"=>"lisinge", "avatar"=>#<File:/tmp/RackMultipart20100426-3076-1x04oxy-0>, "gen"=>"m", "birthday"=>"23", "password"=>"[FILTERED]", "birthyear"=>"1992", "email"=>"[email protected]"}} [paperclip] Saving attachments. Paperclip says it is saving the template but when i look in the public folder in my app it has created a system but the system folder is empty. So it seems like it isnt saving the picture to the folder. It gets handled by the form and saved in my /tmp folder. Maybe you guys have any tips or know what this problem might be? Thanks in advance, Micke.

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• Limiting choices from an intermediary ManyToMany junction table in Django

  - by Matthew Rankin

  Background I've created three Django models—Inventory, SalesOrder, and Invoice—to model items in inventory, sales orders for those items, and invoices for a particular sales order. Each sales order can have multiple items, so I've used an intermediary junction table—SalesOrderItems—using the through argument for the ManyToManyField. Also, partial billing of a sales orders is allowed, so I've created a ForeignKey in the Invoice model related to the SalesOrder model, so that a particular sales order can have multiple invoices. Here's where I deviate from what I've normally seen. Instead of relating the Invoice model to the Item model via a ManyToManyField, I've related the Invoice model to the SalesOrderItem intermediary junction table through the intermediary junction table InvoiceItem. I've done this because it better models reality—our invoices are tied to sales orders and can only include items that are tied to that sales order as opposed to any item in inventory. I will admit that it does seem strange having the intermediary junction table of a ManyToManyField related to the intermediary junction table of another ManyToManyField. Question How can I limit the choices available for the invoice_items in the Invoice model to just the sales_order_items of the SalesOrder model for that particular Invoice? (I tried using limit_choices_to= {'sales_order': self.invoice.sales_order}) as part of the item = models.ForeignKey(SalesOrderItem) in the InvoiceItem model, but that didn't work. Am I correct in thinking that limiting the choices for the invoice_items should be handled in the model instead of in a form? Code class Item(models.Model): item_num = models.SlugField(unique=True) default_price = models.DecimalField(max_digits=10, decimal_places=2, blank=True, null=True) class SalesOrderItem(models.Model): item = models.ForeignKey(Item) sales_order = models.ForeignKey('SalesOrder') unit_price = models.DecimalField(max_digits=10, decimal_places=2) quantity = models.DecimalField(max_digits=10, decimal_places=4) class SalesOrder(models.Model): customer = models.ForeignKey(Party) so_num = models.SlugField(max_length=40, unique=True) sales_order_items = models.ManyToManyField(Item, through=SalesOrderItem) class InvoiceItem(models.Model): item = models.ForeignKey(SalesOrderItem) invoice = models.ForeignKey('Invoice') unit_price = models.DecimalField(max_digits=10, decimal_places=2) quantity = models.DecimalField(max_digits=10, decimal_places=4) class Invoice(models.Model): invoice_num = models.SlugField(max_length=25) sales_order = models.ForeignKey(SalesOrder) invoice_items = models.ManyToManyField(SalesOrderItem, through='InvoiceItem')

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• C# Path Ellipsis without Win32 API call revisited

  - by casterle

  I was searching for a way to insert an ellipsis in a C# path, and found an answer here on stackoverflow: http://tinyurl.com/y6rmdfr Using the RTM versions of VS2010 and .Net 4.0, I was unable to get the suggested method to work. I searched the 'Net and found example code that uses the same method, but it failed in the same way. You can see the string I'm trying to shorten in my code below. After calling the MeasureText method, both the input string (OriginalName) and the output string (ellipsisedName) look like this: d:\abcd\efgh\ijkl\mnop\qrst\...\test.txt\0F\GHIJ\KLMN\OPQR\STIV\WXYZ\test.txt Two problems: 1) The resulting string is narfed (the path is truncated as expected, but is followed by what looks like a C-style terminating null and a chunk of the original path). 2) My original string is changed to be identical to the output string. Am I doing something wrong? namespace WindowsFormsApplication2 { public partial class Form1 : Form { public Form1() { InitializeComponent(); string OriginalPath = @"d:\abcd\efgh\ijkl\mnop\qrst\uvwx\yzAB\CDEF\GHIJ\KLMN\OPQR\STIV\WXYZ\test.txt"; string ellipsisedPath = OriginalPath; Size proposedSize = new Size(label1.Width, label1.Height); TextRenderer.MeasureText(ellipsisedPath, label1.Font, proposedSize, TextFormatFlags.ModifyString | TextFormatFlags.PathEllipsis); } } }

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• Print Report in Microsoft Dynamics AX 2009 through X++

  - by haroonattari

  I am trying to print sales confirmation report on a button click which I have added on Sales Order Detail form in Microsoft Dynamics AX 2009. On click event of that button, I have written following code: void clicked() { Args args; ReportRun reportRun; SalesFormLetter salesFormLetter; PrintJobSettings printJobSettings; CustConfirmJour custConfirmJour; RecordSortedList list = new RecordSortedList(55); SalesTable salesTableUpdate; ; SELECT firstonly custConfirmJour order by ConfirmID desc where custConfirmJour.SalesId == salesTable.SalesId ; list.ins(custConfirmJour); args = new Args(ReportStr(SalesConfirm)); printJobSettings = new PrintJobSettings(); printJobSettings.SetTarget(PrintMedium::Printer); printJobSettings.suppressScalingMessage(true); salesFormLetter = new SalesFormLetter_Confirm(true); salesFormLetter.updatePrinterSettingsFormLetter(printJobSettings.packPrintJobSettings()); args.designName("Standard"); args.caller(salesFormletter); args.parmEnum(PrintCopyOriginal::Original); args.parmEnumType(enumnum(PrintCopyOriginal)); args.object(list);     reportRun = new ReportRun(args); reportRun.setTarget(PrintMedium::Printer);     reportRun.init();     reportRun.run(); } The code is running fine except on problem that instead of sending the report directly on printer, print preview is coming. I will be very greateful if anyone of you could let me know what is wrong with this code. Rgds Haroon

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• How do I make a jQuery POST function open the new page?

  - by ciclistadan

  I know that a submit button in HTML can submit a form which opens the target page, but how do I cause a jQuery ajax call POST information to a new page and display the new page. I am submitting information that is gathered by clicking elements (which toggle a new class) and then all items with this new class are added to an array and POSTed to a new page. I can get it to POST the data but it seems to be working functioning in an ajax non-refreshing manner, not submitting the page and redirecting to the new page. how might I go about doing this? here's the script section: //onload function $(function() { //toggles items to mark them for purchase //add event handler for selecting items $(".line").click(function() { //get the lines item number var item = $(this).toggleClass("select").attr("name"); }); $('#process').click(function() { var items = []; //place selected numbers in a string $('.line.select').each(function(index){ items.push($(this).attr('name')); }); $.ajax({ type: 'POST', url: 'additem.php', data: 'items='+items, success: function(){ $('#menu').hide(function(){ $('#success').fadeIn(); }); } }); }); return false; }); any pointers would be great!! thanks

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• FOR BOUNTY: "QFontEngine(Win) GetTextMetrics failed ()" error on 64-bit Windows

  - by David Murdoch

  I'll add a large bounty to this when Stack Overflow lets me. I'm using wkhtmltopdf to convert HTML web pages to PDFs. This works perfectly on my 32-bit dev server [unfortunately, I can't ship my machine :-p ]. However, when I deploy to the web application's 64-bit server the following errors are displayed: C:\>wkhtmltopdf http://www.google.com google.pdf Loading pages (1/5) QFontEngine::loadEngine: GetTextMetrics failed () ] 10% QFontEngineWin: GetTextMetrics failed () QFontEngineWin: GetTextMetrics failed () QFontEngine::loadEngine: GetTextMetrics failed () QFontEngineWin: GetTextMetrics failed () QFontEngineWin: GetTextMetrics failed () QFontEngineWin: GetTextMetrics failed () QFontEngine::loadEngine: GetTextMetrics failed () ] 36% QFontEngineWin: GetTextMetrics failed () QFontEngineWin: GetTextMetrics failed () // ...etc.... and the PDF is created and saved... just WITHOUT text. All form-fields, images, borders, tables, divs, spans, ps, etc are rendered accurately...just void of any text at all. Server information: Windows edition: Windows Server Standard Service Pack 2 Processor: Intel Xeon E5410 @ 2.33GHz 2.33 GHz Memory: 8.00 GB System type: 64-bit Operating System Can anyone give me a clue as to what is happening and how I can fix this? Also, I wasn't sure what to tag/title this question with...so if you can think of better tags/title comment them or edit the question. :-)

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• ASP.NET MVC Ajax.BeginForm eats params of submit button clicked. Looks like bug.

  - by RonnBlack

  If you are using Ajax.BeginForm() with multiple submit buttons similar to this: // View.aspx <% using (Ajax.BeginForm("Action", "Controller", new AjaxOptions { UpdateTargetId = "MyControl", })) { %> <span id="MyControl"> <% Html.RenderPartial("MyControl"); %> </span> <% } %> //MyControl.ascx <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl" %> <input name="prev" type="submit" value="prev" /> <input name="next" type="submit" value="next" /> //... Everything is submitted to the controller fine but the params for the submit button that was clicked are absent from the Request. In otherwords Request["next"] and Request["prev"] are always null. I looked in to the JavaScript in Microsoft.MvcAjax.js and it looks like the function Sys_Mvc_MvcHelpers$_serializeForm completely skips over the inputs that are of type 'submit'. This doesn't seem logical at all. How else can you find out what button has been clicked? It looks like a bug to me. Is there any logical reason to skip these form parameters?

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• Unit Testing - Validation of ViewModel ASP.NET MVC 2

  - by dean nolan

  I am currently unit testing a service that adds users to a repository. I am using dependency injection to test using a fake repository. The repository has a method CreateUser(User user) which just adds it to the database or in this case a List of Users. The logic for the creation is in the UserServices class. The application has a form for creating a user that requires some properties such as name and address. This is an MVC 2 app and I will be using the new validation using data annotations. This makes me wonder about a few things: 1) Should I annotate a POCO object that will map to the database? Or should I create a specific View Model that has these annotations and pass this data to the UserServices class? 2)Should the UserServicesClass also check this data? Would I best be constructing a Usr out of the ViewModel and passing this into the Service as a parameter? 3) The actual unit testing would depend on 2), I either populate a User object and pass that in, or I pass a large list of strings to the method CreateUser. Writing this out I get a basic idea that I should probably annotate the view model only, pass in a user (constructed by the view model if the data is valid) and also just construct the user in the unit test also. Is this the best way to go?

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• Format date from SQLCE to display in DataGridView

  - by Ruben Trancoso

  hi folks, I have a DataGridView bound to a table from a .sdf database through a BindSource. The date column display dates like "d/M/yyyy HH:mm:ss". e.: "27/2/1971 00:00:00". I want to make it display just "27/02/1971" in its place. I tried to apply DataGridViewCellStyle {format=dd/MM/yyyy} but nothing happens, event with other pre-built formats. On the the other side, there's a Form with a MasketTextBox with a "dd/MM/yyyy" mask to its input that is bound to the same column and uses a Parse and a Format event handler before display and send it to the db. Binding dataNascimentoBinding = new Binding("Text", this.source, "Nascimento", true); dataNascimentoBinding.Format += new ConvertEventHandler(Util.formatDateConvertEventHandler); dataNascimentoBinding.Parse += new ConvertEventHandler(Util.parseDateConvertEventHandler); this.dataNascimentoTxt.DataBindings.Add(dataNascimentoBinding); public static string convertDateString2DateString(string dateString, string inputFormat, string outputFormat ) { DateTime date = DateTime.ParseExact(dateString, inputFormat, DateTimeFormatInfo.InvariantInfo); return String.Format("{0:" + outputFormat + "}", date); } public static void formatDateConvertEventHandler(object sender, ConvertEventArgs e) { if (e.DesiredType != typeof(string)) return; if (e.Value.GetType() != typeof(string)) return; String dateString = (string)e.Value; e.Value = convertDateString2DateString(dateString, "d/M/yyyy HH:mm:ss", "dd/MM/yyyy"); } public static void parseDateConvertEventHandler(object sender, ConvertEventArgs e) { if (e.DesiredType != typeof(string)) return; if (e.Value.GetType() != typeof(string)) return; string value = (string)e.Value; try { e.Value = DateTime.ParseExact(value, "dd/MM/yyyy", DateTimeFormatInfo.InvariantInfo); } catch { return; } } Like you can see by the code it was expexted that Date coming from SQL would be a DateTime value as is its column, but my eventHandler is receiving a string instead. Likewise, the result date for parse should be a datetime but its a string also. I'm puzzled dealing with this datetime column.

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• «HTTP::Message content must be bytes» error when trying to post

  - by ZyX

  I have the following code: ... sub setImage { my $self=shift; my $filename=shift; unless(-r $filename) { warn "File $filename not found"; return; } my $imgn=shift; my $operation=&URI::Escape::uri_escape_utf8( (shift) ? "???????! (Delete)" : "?????????! (Store)"); my $FH=&::File::open($filename, 0, 0); my $image; # &utf8::downgrade($image); sysread($FH, $image, 102400, 0); close $FH; my $imginfo=eval{&Image::Info::image_info(\$image)}; if($@ or $imginfo->{"error"}) { warn "Invalid image: ".($@ || $imginfo->{"error"}); return undef; } my $fields=[ DIR => $self->url("fl"), OPERATION => $operation, FILE_NAME => ".photo$imgn", # FILE => [$filename], FILE => [undef, "image.".$imginfo->{"file_ext"}, # Content_Type => $imginfo->{"file_media_type"}, # Content_Type => 'application/octet-stream', Content => $image, ], ]; my $response=&ZLR::UA::post( &ZLR::UA::absURL("/cgi-bin/file_manager")."", $fields, Content_Type => "form-data", ); print $response->decoded_content; } ... When I try to use function setImage it fails with error HTTP::Message content must be bytes at /usr/lib64/perl5/vendor_perl/5.8.8/HTTP/Request/Common.pm line 91. Worse that I can't reproduce this error without using all of my code and upgrading libwww-perl does nothing. What can cause it?

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• Is there something like a "long running offline transaction" for NHibernate or any other ORM?

  - by Vilx-

  In essence this is a followup of this question. I'm beginning to feel that I should give up the whole idea, but I'll give it one more shot. What I want is pretty much like a DB transaction. It should track my changes to the DB and then in the end allow me to either commit or rollback them. If I insert an object, I should get it back in my next (appropriate) SELECT query. If I delete it, future SELECT queries should not return it. Etc. But there is one catch - this transaction would be very long running. It would start when the user opened a form (I'm talking about Windows Forms here), and the commit/rollback would be when the user closed it(with OK/Cancel). So it could take anywhere between seconds and days. This requirement rules out a standard DB transaction because that would lock the tables/rows it touched, and other users wouldn't be able to use the system. Also the transaction should not commit ANY changes to the DB until it was really committed. So if one user makes some changes, others don't see them until OK button is hit. This prevents errors in case the computer crashes or is disconnected from the network. I'm quite OK if the solution puts constraints on my model (I'm using MSSQL 2008, btw). I can design the DB/code any way I like. I'm also fine with the idea that a commit could fail because someone already modified one of the objects my transaction touched. Is there anything like this? I looked at NHibernate.Burrow, but I'm not sure that that's the thing I want. Added: It's the very beginning of the project so I'm not tied to NHibernate. I started out with it but I can still change easily.

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• ASP.Net MVC Object Reference in Edit View when using DropDownListFor()

  - by hermiod

  This question is related to another I ask recently, it can be found here for some background information. Here is the code in the Edit ActionResult: public virtual ActionResult Edit(int id) { ///Set data for DropDownLists. ViewData["MethodList"] = tr.ListMethods(); ViewData["GenderList"] = tr.ListGenders(); ViewData["FocusAreaList"] = tr.ListFocusAreas(); ViewData["SiteList"] = tr.ListSites(); ViewData["TypeList"] = tr.ListTalkbackTypes(); ViewData["CategoryList"] = tr.ListCategories(); return View(tr.GetTalkback(id)); } I add lists to the ViewData to use in the dropdownlists, these are all IEnumerable and are all returning values. GetTalkback() returns an Entity framework object of type Talkback which is generated from the Talkback table. The DropDownListFor code is: <%: Html.DropDownListFor(model=>model.method_id,new SelectList(ViewData["MethodList"] as IEnumerable<SelectListItem>,"Value","Text",Model.method_id)) %> The record I am viewing has values in all fields. When I click submit on the View, I get an Object reference not set to an instance of an object. error on the above line. There are a number of standard fields in the form prior to this, so the error is only occurring on dropdown lists, and it is occurring on all of them. Any ideas? This is my first foray in to MVC, C#, and Entity so I am completely lost!

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• HTTP requests and Apache modules: Creative attack vectors

  - by pinkgothic

  Slightly unorthodox question here: I'm currently trying to break an Apache with a handful of custom modules. What spawned the testing is that Apache internally forwards requests that it considers too large (e.g. 1 MB trash) to modules hooked in appropriately, forcing them to deal with the garbage data - and lack of handling in the custom modules caused Apache in its entirety to go up in flames. Ouch, ouch, ouch. That particular issue was fortunately fixed, but the question's arisen whether or not there may be other similar vulnerabilities. Right now I have a tool at my disposal that lets me send a raw HTTP request to the server (or rather, raw data through an established TCP connection that could be interpreted as an HTTP request if it followed the form of one, e.g. "GET ...") and I'm trying to come up with other ideas. (TCP-level attacks like Slowloris and Nkiller2 are not my focus at the moment.) Does anyone have a few nice ideas how to confuse the server and/or its modules to the point of self-immolation? Broken UTF-8? (Though I doubt Apache cares about encoding - I imagine it just juggles raw bytes.) Stuff that is only barely too long, followed by a 0-byte, followed by junk? et cetera I don't consider myself a very good tester (I'm doing this by necessity and lack of manpower; I unfortunately don't even have a more than basic grasp of Apache internals that would help me along), which is why I'm hoping for an insightful response or two or three. Maybe some of you have done some similar testing for your own projects? (If stackoverflow is not the right place for this question, I apologise. Not sure where else to put it.)

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• Html.LabelFor and Html.TextBoxFor generate empy html code

  - by Ceridan

  I'm writing my first ASP.NET MVC application and there is one big problem for me. I want to make a control which will represent a form, but when I try to generate labels and textboxes it returns to me empty page. So, this is my model file (MyModel.cs): namespace MyNamespace.Models { public class MyModel { [Required(ErrorMessage = "You have to fill this field")] [DisplayName("Input name")] public string Name{ get; set; } } } This is MyFormControlView.ascx file with my control: <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<MyNamespace.Models.MyModel>"%> <div> <% using (Html.BeginForm()) { Html.LabelFor(m => m.Name); Html.TextBoxFor(m => m.Name); Html.ValidationMessageFor(m => m.Name); } %> </div> And this is my Index.aspx file where I render the control: <%@ Page Language="C#" MasterPageFile="~/Views/Shared/Main.Master" Inherits="System.Web.Mvc.ViewPage<System.Collections.IEnumerable>" %> <asp:Content runat="server" ID="MainContent" ContentPlaceHolderID="MainContent"> This is my control test! <%Html.RenderPartial("MyFormControlView", new MyNamespace.Models.MyModel { Name = "MyTestName"}); %> </asp:Content> So, when I run my application the result is lonely caption: "This is my control test!" and there are no label or textbox on the generated page. If I inspect the source code of the generated page I can see my block, but it's inner text is empty. Please, could you help me?

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