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  • MvcExtensions - PerRequestTask

    - by kazimanzurrashid
    In the previous post, we have seen the BootstrapperTask which executes when the application starts and ends, similarly there are times when we need to execute some custom logic when a request starts and ends. Usually, for this kind of scenario we create HttpModule and hook the begin and end request events. There is nothing wrong with this approach, except HttpModules are not at all IoC containers friendly, also defining the HttpModule execution order is bit cumbersome, you either have to modify the machine.config or clear the HttpModules and add it again in web.config. Instead, you can use the PerRequestTask which is very much container friendly as well as supports execution orders. Lets few examples where it can be used. Remove www Subdomain Lets say we want to remove the www subdomain, so that if anybody types http://www.mydomain.com it will automatically redirects to http://mydomain.com. public class RemoveWwwSubdomain : PerRequestTask { public RemoveWww() { Order = DefaultOrder - 1; } protected override TaskContinuation ExecuteCore(PerRequestExecutionContext executionContext) { const string Prefix = "http://www."; Check.Argument.IsNotNull(executionContext, "executionContext"); HttpContextBase httpContext = executionContext.HttpContext; string url = httpContext.Request.Url.ToString(); bool startsWith3W = url.StartsWith(Prefix, StringComparison.OrdinalIgnoreCase); bool shouldContinue = true; if (startsWith3W) { string newUrl = "http://" + url.Substring(Prefix.Length); HttpResponseBase response = httpContext.Response; response.StatusCode = (int)HttpStatusCode.MovedPermanently; response.Status = "301 Moved Permanently"; response.RedirectLocation = newUrl; response.SuppressContent = true; shouldContinue = false; } return shouldContinue ? TaskContinuation.Continue : TaskContinuation.Break; } } As you can see, first, we are setting the order so that we do not have to execute the remaining tasks of the chain when we are redirecting, next in the ExecuteCore, we checking the whether www is present, if present we are sending a permanently moved http status code and breaking the task execution chain otherwise we are continuing with the chain. Blocking IP Address Lets take another scenario, your application is hosted in a shared hosting environment where you do not have the permission to change the IIS setting and you want to block certain IP addresses from visiting your application. Lets say, you maintain a list of IP address in database/xml files which you want to block, you have a IBannedIPAddressRepository service which is used to match banned IP Address. public class BlockRestrictedIPAddress : PerRequestTask { protected override TaskContinuation ExecuteCore(PerRequestExecutionContext executionContext) { bool shouldContinue = true; HttpContextBase httpContext = executionContext.HttpContext; if (!httpContext.Request.IsLocal) { string ipAddress = httpContext.Request.UserHostAddress; HttpResponseBase httpResponse = httpContext.Response; if (executionContext.ServiceLocator.GetInstance<IBannedIPAddressRepository>().IsMatching(ipAddress)) { httpResponse.StatusCode = (int)HttpStatusCode.Forbidden; httpResponse.StatusDescription = "IPAddress blocked."; shouldContinue = false; } } return shouldContinue ? TaskContinuation.Continue : TaskContinuation.Break; } } Managing Database Session Now, let see how it can be used to manage NHibernate session, assuming that ISessionFactory of NHibernate is already registered in our container. public class ManageNHibernateSession : PerRequestTask { private ISession session; protected override TaskContinuation ExecuteCore(PerRequestExecutionContext executionContext) { ISessionFactory factory = executionContext.ServiceLocator.GetInstance<ISessionFactory>(); session = factory.OpenSession(); return TaskContinuation.Continue; } protected override void DisposeCore() { session.Close(); session.Dispose(); } } As you can see PerRequestTask can be used to execute small and precise tasks in the begin/end request, certainly if you want to execute other than begin/end request there is no other alternate of HttpModule. That’s it for today, in the next post, we will discuss about the Action Filters, so stay tuned.

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  • How to detect UTF-8-based encoded strings [closed]

    - by Diego Sendra
    A customer of asked us to build him a multi-language based support VB6 scraper, for which we had the need to detect UTF-8 based encoded strings to decode it later for proper displaying in application UI. It's necessary to point out that this need arises based on VB6 limitations to natively support UTF-8 in its controls, contrary to what it happens in .NET where you can tell a control that it should expect UTF-8 encoding. VB6 natively supports ISO 8859-1 and/or Windows-1252 encodings only, for which textboxes, dropdowns, listview controls, others can't be defined to natively support/expect UTF-8 as you can do in .NET considering what we just explained; so we would see weird symbols such as é, è among others, making it a whole mess at the time of displaying. So, next function contains whole UTF-8 encoded punctuation marks and symbols from languages like Spanish, Italian, German, Portuguese, French and others, based on an excellent UTF-8 based list we got from this link - Ref. http://home.telfort.nl/~t876506/utf8tbl.html Basically, the function compares if each and one of the listed UTF-8 encoded sentences, separated by | (pipe) are found in our passed string making a substring search first. Whether it's not found, it makes an alternative ASCII value based search to get a match. Say, a string like "Societé" (Society in english) would return FALSE through calling isUTF8("Societé") while it would return TRUE when calling isUTF8("SocietÈ") since È is the UTF-8 encoded representation of é. Once you got it TRUE or FALSE, you can decode the string through DecodeUTF8() function for properly displaying it, a function we found somewhere else time ago and also included in this post. Function isUTF8(ByVal ptstr As String) Dim tUTFencoded As String Dim tUTFencodedaux Dim tUTFencodedASCII As String Dim ptstrASCII As String Dim iaux, iaux2 As Integer Dim ffound As Boolean ffound = False ptstrASCII = "" For iaux = 1 To Len(ptstr) ptstrASCII = ptstrASCII & Asc(Mid(ptstr, iaux, 1)) & "|" Next tUTFencoded = "Ä|Ã…|Ç|É|Ñ|Ö|ÃŒ|á|Ã|â|ä|ã|Ã¥|ç|é|è|ê|ë|í|ì|î|ï|ñ|ó|ò|ô|ö|õ|ú|ù|û|ü|â€|°|¢|£|§|•|¶|ß|®|©|â„¢|´|¨|â‰|Æ|Ø|∞|±|≤|≥|Â¥|µ|∂|∑|âˆ|Ï€|∫|ª|º|Ω|æ|ø|¿|¡|¬|√|Æ’|≈|∆|«|»|…|Â|À|Ã|Õ|Å’|Å“|–|—|“|â€|‘|’|÷|â—Š|ÿ|Ÿ|â„|€|‹|›|ï¬|fl|‡|·|‚|„|‰|Â|Ú|Ã|Ë|È|Ã|ÃŽ|Ã|ÃŒ|Ó|Ô||Ã’|Ú|Û|Ù|ı|ˆ|Ëœ|¯|˘|Ë™|Ëš|¸|Ë|Ë›|ˇ" & _ "Å|Å¡|¦|²|³|¹|¼|½|¾|Ã|×|Ã|Þ|ð|ý|þ" & _ "â‰|∞|≤|≥|∂|∑|âˆ|Ï€|∫|Ω|√|≈|∆|â—Š|â„|ï¬|fl||ı|˘|Ë™|Ëš|Ë|Ë›|ˇ" tUTFencodedaux = Split(tUTFencoded, "|") If UBound(tUTFencodedaux) > 0 Then iaux = 0 Do While Not ffound And Not iaux > UBound(tUTFencodedaux) If InStr(1, ptstr, tUTFencodedaux(iaux), vbTextCompare) > 0 Then ffound = True End If If Not ffound Then 'ASCII numeric search tUTFencodedASCII = "" For iaux2 = 1 To Len(tUTFencodedaux(iaux)) 'gets ASCII numeric sequence tUTFencodedASCII = tUTFencodedASCII & Asc(Mid(tUTFencodedaux(iaux), iaux2, 1)) & "|" Next 'tUTFencodedASCII = Left(tUTFencodedASCII, Len(tUTFencodedASCII) - 1) 'compares numeric sequences If InStr(1, ptstrASCII, tUTFencodedASCII) > 0 Then ffound = True End If End If iaux = iaux + 1 Loop End If isUTF8 = ffound End Function Function DecodeUTF8(s) Dim i Dim c Dim n s = s & " " i = 1 Do While i <= Len(s) c = Asc(Mid(s, i, 1)) If c And &H80 Then n = 1 Do While i + n < Len(s) If (Asc(Mid(s, i + n, 1)) And &HC0) <> &H80 Then Exit Do End If n = n + 1 Loop If n = 2 And ((c And &HE0) = &HC0) Then c = Asc(Mid(s, i + 1, 1)) + &H40 * (c And &H1) Else c = 191 End If s = Left(s, i - 1) + Chr(c) + Mid(s, i + n) End If i = i + 1 Loop DecodeUTF8 = s End Function

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  • Handy SQL Server Functions Series (HSSFS) Part 2.0 - Prelude to Parsing Patterns Properly

    - by Most Valuable Yak (Rob Volk)
    In Part 1 of the series I wrote about 2 lesser-known and somewhat undocumented functions. In this part, I'm going to cover some familiar string functions like Substring(), Parsename(), Patindex(), and Charindex() and delve into their strengths and weaknesses. I'm also splitting this part up into sub-parts to help focus on a particular technique and/or problem with the technique, hence the Part 2.0. Consider this a composite post, or com-post, if you will. (It may just turn out to be a pile of sh_t after all) I'll be using a contrived example, perhaps the most frustratingly useful, or usefully frustrating, function in SQL Server: @@VERSION. Contrived, because there are better ways to get the information (which I'll cover later); frustrating, because of the way Microsoft formatted the value; and useful because it does have 1 or 2 bits of information not found elsewhere. First let's take a look at the output of @@VERSION: Microsoft SQL Server 2008 R2 (RTM) - 10.50.1600.1 (Intel X86) Apr 2 2010 15:53:02 Copyright (c) Microsoft Corporation Developer Edition on Windows NT 5.1 <X86> (Build 2600: Service Pack 3) There are 4 lines, with lines 2-4 indented with a tab character.  In case your browser (or this blog software) doesn't show it correctly, I gave each line a different color.  While this PRINTs nicely, if you SELECT @@VERSION in grid mode it all runs together because it ignores carriage return/line feed (CR/LF) characters.  Not fatal, but annoying. Note that @@VERSION's output will vary depending on edition and version of SQL Server, and also the OS it's installed on.  Despite the differences, the output is laid out the same way and the relevant pieces are in the same order. I'll be using the following view for Parts 2.1 onward, so we have a nice collection of @@VERSION information: create view version(SQLVersion,VersionString) AS ( select 2000, 'Microsoft SQL Server 2000 - 8.00.2055 (Intel X86) Dec 16 2008 19:46:53 Copyright (c) 1988-2003 Microsoft Corporation Developer Edition on Windows NT 5.1 (Build 2600: Service Pack 3)' union all select 2005, 'Microsoft SQL Server 2005 - 9.00.4053.00 (Intel X86) May 26 2009 14:24:20 Copyright (c) 1988-2005 Microsoft Corporation Developer Edition on Windows NT 5.1 (Build 2600: Service Pack 3)' union all select 2008, 'Microsoft SQL Server 2008 R2 (RTM) - 10.50.1600.1 (Intel X86) Apr 2 2010 15:53:02 Copyright (c) Microsoft Corporation Developer Edition on Windows NT 5.1 <X86> (Build 2600: Service Pack 3)' union all select 2005, 'Microsoft SQL Server 2005 - 9.00.3080.00 (Intel X86) Sep 6 2009 01:43:32 Copyright (c) 1988-2005 Microsoft Corporation Standard Edition on Windows NT 5.2 (Build 3790: Service Pack 2)' union all select 2008, 'Microsoft SQL Server 2008 R2 (RTM) - 10.50.1600.1 (X64) Apr 2 2010 15:48:46 Copyright (c) Microsoft Corporation Developer Edition (64-bit) on Windows NT 6.1 <X64> (Build 7600: ) (Hypervisor)' union all select 2008, 'Microsoft SQL Server 2008 R2 (RTM) - 10.50.1600.1 (X64) Apr 2 2010 15:48:46 Copyright (c) Microsoft Corporation Express Edition with Advanced Services (64-bit) on Windows NT 6.1 <X64> (Build 7600: ) (Hypervisor)' ) Feel free to add your own @@VERSION info if it's not already there. In Part 2.1 I'll focus on extracting the SQL Server version number (10.50.1600.1 in first example) and the Edition (Developer), but will have a solution that works with all versions.  Stay tuned!

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  • MVC Portable Areas &ndash; Static Files as Embedded Resources

    - by Steve Michelotti
    This is the third post in a series related to build and deployment considerations as I’ve been exploring MVC Portable Areas: #1 – Using Web Application Project to build portable areas #2 – Conventions for deploying portable area static files #3 – Portable area static files as embedded resources In the last post, I walked through a convention for managing static files.  In this post I’ll discuss another approach to manage static files (e.g., images, css, js, etc.).  With this approach, you *also* compile the static files as embedded resources into the assembly similar to the *.aspx pages. Once again, you can set this to happen automatically by simply modifying your *.csproj file to include the desired extensions so you don’t have to remember every time you add a file: 1: <Target Name="BeforeBuild"> 2: <ItemGroup> 3: <EmbeddedResource Include="**\*.aspx;**\*.ascx;**\*.gif;**\*.css;**\*.js" /> 4: </ItemGroup> 5: </Target> We now need a reliable way to serve up these static files that are embedded in the assembly. There are a couple of ways to do this but one way is to simply create a Resource controller whose job is dedicated to doing this. 1: public class ResourceController : Controller 2: { 3: public ActionResult Index(string resourceName) 4: { 5: var contentType = GetContentType(resourceName); 6: var resourceStream = Assembly.GetExecutingAssembly().GetManifestResourceStream(resourceName); 7:   8: return this.File(resourceStream, contentType); 9: return View(); 10: } 11:   12: private static string GetContentType(string resourceName) 13: { 14: var extention = resourceName.Substring(resourceName.LastIndexOf('.')).ToLower(); 15: switch (extention) 16: { 17: case ".gif": 18: return "image/gif"; 19: case ".js": 20: return "text/javascript"; 21: case ".css": 22: return "text/css"; 23: default: 24: return "text/html"; 25: } 26: } 27: } In order to use this controller, we need to make sure we’ve registered the route in our portable area registration (shown in lines 5-6): 1: public class WidgetAreaRegistration : PortableAreaRegistration 2: { 3: public override void RegisterArea(System.Web.Mvc.AreaRegistrationContext context, IApplicationBus bus) 4: { 5: context.MapRoute("ResourceRoute", "widget1/resource/{resourceName}", 6: new { controller = "Resource", action = "Index" }); 7:   8: context.MapRoute("Widget1", "widget1/{controller}/{action}", new 9: { 10: controller = "Home", 11: action = "Index" 12: }); 13:   14: RegisterTheViewsInTheEmbeddedViewEngine(GetType()); 15: } 16:   17: public override string AreaName 18: { 19: get { return "Widget1"; } 20: } 21: } In my previous post, we relied on a custom Url helper method to find the actual physical path to the static file like this: 1: <img src="<%: Url.AreaContent("/images/arrow.gif") %>" /> Hello World! However, since we are now embedding the files inside the assembly, we no longer have to worry about the physical path. We can change this line of code to this: 1: <img src="<%: Url.Resource("Widget1.images.arrow.gif") %>" /> Hello World! Note that I had to fully quality the resource name (with namespace and physical location) since that is how .NET assemblies store embedded resources. I also created my own Url helper method called Resource which looks like this: 1: public static string Resource(this UrlHelper urlHelper, string resourceName) 2: { 3: var areaName = (string)urlHelper.RequestContext.RouteData.DataTokens["area"]; 4: return urlHelper.Action("Index", "Resource", new { resourceName = resourceName, area = areaName }); 5: } This method gives us the convenience of not having to know how to construct the URL – but just allowing us to refer to the resource name. The resulting html for the image tag is: 1: <img src="/widget1/resource/Widget1.images.arrow.gif" /> so we can always request any image from the browser directly. This is almost analogous to the WebResource.axd file but for MVC. What is interesting though is that we can encapsulate each one of these so that each area can have it’s own set of resources and they are easily distinguished because the area name is the first segment of the route. This makes me wonder if something like this ResourceController should be baked into portable areas itself. I’m definitely interested in anyone has any opinions on it or have taken alternative approaches.

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  • Parsing T-SQL – The easy way

    - by Dave Ballantyne
    Every once in a while, I hit an issue that would require me to interrogate/parse some T-SQL code.  Normally, I would shy away from this and attempt to solve the problem in some other way.  I have written parsers before in the the past using LEX and YACC, and as much fun and awesomeness that path is,  I couldnt justify the time it would take. However, this week I have been faced with just such an issue and at the back of my mind I can remember reading through the SQLServer 2012 feature pack and seeing something called “Microsoft SQL Server 2012 Transact-SQL Language Service “.  This is described there as : “The SQL Server Transact-SQL Language Service is a component based on the .NET Framework which provides parsing validation and IntelliSense services for Transact-SQL for SQL Server 2012, SQL Server 2008 R2, and SQL Server 2008. “ Sounds just what I was after.  Documentation is very scant on this so dont take what follows as best practice or best use, just a practice and a use. Knowing what I was sort of looking for something, I found the relevant assembly in the gac which is the simply named ,’Microsoft.SqlServer.Management.SqlParser’. Even knowing that you wont find much in terms of documentation if you do a web-search, but you will find the MSDN documentation that list the members and methods etc… The “scanner”  class sounded the most appropriate for my needs as that is described as “Scans Transact-SQL searching for individual units of code or tokens.”. After a bit of poking, around the code i ended up with was something like [System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SqlServer.Management.SqlParser") | Out-Null $ParseOptions = New-Object Microsoft.SqlServer.Management.SqlParser.Parser.ParseOptions $ParseOptions.BatchSeparator = 'GO' $Parser = new-object Microsoft.SqlServer.Management.SqlParser.Parser.Scanner($ParseOptions) $Sql = "Create Procedure MyProc as Select top(10) * from dbo.Table" $Parser.SetSource($Sql,0) $Token=[Microsoft.SqlServer.Management.SqlParser.Parser.Tokens]::TOKEN_SET $Start =0 $End = 0 $State =0 $IsEndOfBatch = $false $IsMatched = $false $IsExecAutoParamHelp = $false while(($Token = $Parser.GetNext([ref]$State ,[ref]$Start, [ref]$End, [ref]$IsMatched, [ref]$IsExecAutoParamHelp ))-ne [Microsoft.SqlServer.Management.SqlParser.Parser.Tokens]::EOF) { try{ ($TokenPrs =[Microsoft.SqlServer.Management.SqlParser.Parser.Tokens]$Token) | Out-Null $TokenPrs $Sql.Substring($Start,($end-$Start)+1) }catch{ $TokenPrs = $null } } As you can see , the $Sql variable holds the sql to be parsed , that is pushed into the $Parser object using SetSource,  and then we will use GetNext until the EOF token is returned.  GetNext will also return the Start and End character positions within the source string of the parsed text. This script’s output is : TOKEN_CREATE Create TOKEN_PROCEDURE Procedure TOKEN_ID MyProc TOKEN_AS as TOKEN_SELECT Select TOKEN_TOP top TOKEN_INTEGER 10 TOKEN_FROM from TOKEN_ID dbo TOKEN_TABLE Table note that the ‘(‘, ‘)’  and ‘*’ characters have returned a token type that is not present in the Microsoft.SqlServer.Management.SqlParser.Parser.Tokens Enum that has caused an error which has been caught in the catch block.  Fun, Fun ,Fun , Simple T-SQL Parsing.  Hope this helps someone in the same position,  let me know how you get on.

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  • jrunscript as a cross platform scripting environment

    - by user12798506
    ?????????????????????????????????????????????????????????sh????????????UNIX???????????????????sh???????????????????????????????????????????Windows????????????????? sh??????????????find?grep?sed?awk???Windows??????????????????????????????????????????????????????????????????????????????????????????????Windows???Cygwin????????????sh??????Windows??????????????Cygwin????????????????????????????????????????????JDK?????jrunscript?????JavaScript???????????????????????1?????????jrunscript??????????????????? Windows???UNIX??????????????????????? find?grep?sed?awk?????????sh???????????????Windows Script Host??????? Java????????????? ??????????????????????????????????????????????????????????(?????????????????????????????????????????) ?????????????JDK 6??????????????????????????PC????????????????JDK 6?PC????????????????????????????????????JDK????????????????????????????????????????jrunscript?????????????????????????? ?????jrunscript????JavaScript?????????????????????????????????????????? 1) Windows???UNIX????????????????? ?????????????????????????????????????????JavaScript???mytool.js???????????????????????jrunscript???????????UNIX????sh???????Windows????bat????????????????????? mytool.sh (UNIX?): #!/bin/sh bindir=$(cd $(dirname $0) && pwd) case "`uname`" in CYGWIN*) bindir=`cygpath -w "$bindir"` ;; esac jrunscript "${bindir}/mytool.js" $* mytool.bat (Windows?): @echo off set bindir=%~dp0 jrunscript "%bindir%mytool.js" %* UNIX??sh????????Cygwin???????????????????????????????????????????js??????????????UNIX?Windows??????????????????????????????? 2) jrunscript??cat, cp, find?grep?????? jrunscript???UNIX?????????????????????????????????? jrunscript JavaScript built-in functions ????UNIX??sh?????????????????????UNIX?????????????????????????????????????????src??????????java????????????enum???????java?????????????????????????????????????????????? find('src', '.*.java', function(f) { grep('enum', f); }); ???????UNIX?????????????????????????????????????????????????????????????????????????????????????????cp(from, to)??????????????????????????????????????????UNIX??????????? $ cp -r src/* tmp/ ?????????????????????????????????????????find()???????cp -r????????·?????????????????????? function cpr(fromdir, todir, pattern) { if (pattern == undefined) { pattern = ".*"; } var frdir = pathToFile(fromdir).getCanonicalPath(); find(fromdir, pattern, function(f) { // relative dir of file f from 'fromdir'. var relative = f.getParentFile().getCanonicalPath().substring(frdir.length() + 1); var dstdir = pathToFile(todir + "/" + relative); if (!dstdir.exists()) { // Create the destination dir for file f. mkdirs(dstdir); } // Copy file f to 'dstdir'. cp(f, dstdir + "/" + f.getName()); }); } java?????I/O?API??Windows?????????????"/"??????????????????????????????UNIX?Windows?????????????? ????????????exec(cmd)?????????jar???????????????????????????????????????????? $ jrunscript js> exec("jar xvf example.jar") META-INF/ ?????????????µ???B META-INF/MANIFEST.MF ???W?J???????µ???B com/ ?????????????µ???B com/example/ ?????????????µ???B com/example/Bar.class ???W?J???????µ???B com/example/dummy/ ?????????????µ???B com/example/dummy/dummy.txt ?????o???????µ???B com/example/dummy.properties ?????o???????µ???B com/example/Foo.class ???W?J???????µ???B ???exec()?????????????????????????????????????????????????????????????????Windows????????????I/O??????????????????????????????????BAT????????? errmsg.bat: for /L %%i in (1,1,50) do echo "Error Message count = %%i" 1&2 jrunscript??exec()???????????????18??????????????????????????????????? C:\tmp>jrunscript -e "exec('errmsg.bat')" C:\tmp>for /L %i in (1 1 100) do echo "Error Message count = %i" 1>&2 C:\tmp>echo "Error Message count = 1" 1>&2 : C:\tmp>echo "Error Message count = 18" 1>&2 ? ??? ???????????exec()?????????????????????????????????????????????????????????????????DataInputStream???????????????????????? $ jrunscript js this["exec"].toString() function exec(cmd) { var process = java.lang.Runtime.getRuntime().exec(cmd); var inp = new DataInputStream(process.getInputStream()); var line = null; while ((line = inp.readLine()) != null) { println(line); } process.waitFor(); $exit = process.exitValue(); } ?????????????????????????????????????????????????????exec()???????????????exec()?????????????????????????????exec()??????? function exec(cmd) { var process = java.lang.Runtime.getRuntime().exec(cmd); var stdworker = new java.lang.Runnable( {run: function() { cat(process.getInputStream()); }}); var errworker = new java.lang.Runnable( {run: function() { cat(process.getErrorStream()); }}); new java.lang.Thread(stdworker).start(); new java.lang.Thread(errworker).start(); return proc.waitFor(); } ???????????????????cat()???????????cat()?InputStreamReader?????????????????????????????????????????????????? 3) JavaScript???????????????? JavaScript?Java???????????????????????JavaScript????????????Ruby?Groovy?Scala???????????????????????????????????????????????10MB?????????????????????????????????????JavaScript????????????????????KB?????????????MB?JAR??????????????????????????JRE?JDK?????????????????????????????????????????

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  • Looking for a real-world example illustrating that composition can be superior to inheritance

    - by Job
    I watched a bunch of lectures on Clojure and functional programming by Rich Hickey as well as some of the SICP lectures, and I am sold on many concepts of functional programming. I incorporated some of them into my C# code at a previous job, and luckily it was easy to write C# code in a more functional style. At my new job we use Python and multiple inheritance is all the rage. My co-workers are very smart but they have to produce code fast given the nature of the company. I am learning both the tools and the codebase, but the architecture itself slows me down as well. I have not written the existing class hierarchy (neither would I be able to remember everything about it), and so, when I started adding a fairly small feature, I realized that I had to read a lot of code in the process. At the surface the code is neatly organized and split into small functions/methods and not copy-paste-repetitive, but the flip side of being not repetitive is that there is some magic functionality hidden somewhere in the hierarchy chain that magically glues things together and does work on my behalf, but it is very hard to find and follow. I had to fire up a profiler and run it through several examples and plot the execution graph as well as step through a debugger a few times, search the code for some substring and just read pages at the time. I am pretty sure that once I am done, my resulting code will be short and neatly organized, and yet not very readable. What I write feels declarative, as if I was writing an XML file that drives some other magic engine, except that there is no clear documentation on what the XML should look like and what the engine does except for the existing examples that I can read as well as the source code for the 'engine'. There has got to be a better way. IMO using composition over inheritance can help quite a bit. That way the computation will be linear rather than jumping all over the hierarchy tree. Whenever the functionality does not quite fit into an inheritance model, it will need to be mangled to fit in, or the entire inheritance hierarchy will need to be refactored/rebalanced, sort of like an unbalanced binary tree needs reshuffling from time to time in order to improve the average seek time. As I mentioned before, my co-workers are very smart; they just have been doing things a certain way and probably have an ability to hold a lot of unrelated crap in their head at once. I want to convince them to give composition and functional as opposed to OOP approach a try. To do that, I need to find some very good material. I do not think that a SCIP lecture or one by Rich Hickey will do - I am afraid it will be flagged down as too academic. Then, simple examples of Dog and Frog and AddressBook classes do not really connivence one way or the other - they show how inheritance can be converted to composition but not why it is truly and objectively better. What I am looking for is some real-world example of code that has been written with a lot of inheritance, then hit a wall and re-written in a different style that uses composition. Perhaps there is a blog or a chapter. I am looking for something that can summarize and illustrate the sort of pain that I am going through. I already have been throwing the phrase "composition over inheritance" around, but it was not received as enthusiastically as I had hoped. I do not want to be perceived as a new guy who likes to complain and bash existing code while looking for a perfect approach while not contributing fast enough. At the same time, my gut is convinced that inheritance is often the instrument of evil and I want to show a better way in a near future. Have you stumbled upon any great resources that can help me?

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  • View all ntext column text in SQL Server Management Studio for SQL CE database

    - by Dave
    I often want to do a "quick check" of the value of a large text column in SQL Server Management Studio (SSMS). The maximum number of characters that SSMS will let you view, in grid results mode, is 65535. (It is even less in text results mode.) Sometimes I need to see something beyond that range. Using SQL Server 2005 databases, I often used the trick of converting it to XML, because SSMS lets you view much larger amounts of text that way: SELECT CONVERT(xml, MyCol) FROM MyTable WHERE ... But now I am using SQL CE, and there is no Xml data type. There is still a "Maximum Characters Retreived XML" value under Options; I suppose this is useful when connecting to other data sources. I know I can just get the full value by running a little console app or something, but is there a way within SSMS to see the entire ntext column value? [Edit] OK, this didn't get much attention the first time around (18 views?!). It's not a huge concern, but maybe I'm just obsessed with it. There has to be some good way around this, doesn't there? So a modest bounty is active. What I am willing to accept as answers, in order from best-to-worst: A solution that works just as easy as the XML trick in SQL CE. That is, a single function (convert, cast, etc.) that does the job. A not-too-invasive way to hack SSMS to get it to display more text in the results. An equivalent SQL query (perhaps something that creatively uses SUBSTRING and generates multiple ad-hoc columns??) to see the results. The solution should work with nvarchar and ntext columns of any length in SQL CE from SSMS. Any ideas?

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  • Limiting Number of Characters in a ContentEditable div

    - by Bill Dami
    Hi guys, I am using contenteditable div elements in my web application and I am trying to come up with a solution to limit the amount of characters allowed in the area, and once the limit is hit, attempting to enter characters simply does nothing. This is what I have so far: var content_id = 'editable_div'; //binding keyup/down events on the contenteditable div $('#'+content_id).keyup(function(){ check_charcount(content_id, max); }); $('#'+content_id).keydown(function(){ check_charcount(content_id, max); }); function check_charcount(content_id, max) { if($('#'+content_id).text().length > max) { $('#'+content_id).text($('#'+content_id).text().substring(0, max)); } } This DOES limit the number of characters to the number specified by 'max', however once the area's text is set by the jquery .text() function the cursor resets itself to the beginning of the area. So if the user keeps on typing, the newly entered characters will be inserted at the beginning of the text and the last character of the text will be removed. So really, I just need some way to keep the cursor at the end of the contenteditable area's text.

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  • WPF derived ComboBox SelectedValuePath issue

    - by opedog
    In our application we have a very large set of data that acts as our data dictionary for ComboBox lists, etc. This data is staticly cached and keyed off of 2 variables, so I thought it wise to write a control that derived from ComboBox and exposed the 2 keys as DPs. When those 2 keys have proper values I set the ItemsSource of the ComboBox automatically from the data dictionary list it corresponds to. I also automatically set the SelectedValuePath and DisplayMemberPath to Code and Description, respectively. Here's how an example of how an item in the ItemsSource from the data dictionary list always looks: public class DataDictionaryItem { public string Code { get; set; } public string Description { get; set; } public string Code3 { get { return this.Get.Substring(0, 3); } } } The value of Code is always 4 bytes long, but sometimes I only need to bind 3 bytes of it. Hence, the Code3 property. Here's how the code looks inside my custom combobox to set the ItemsSource: private static void SetItemsSource(CustomComboBox combo) { if (string.IsNullOrEmpty(combo.Key1) || string.IsNullOrEmpty(combo.Key2)) { combo.ItemsSource = null; return; } List<DataDictionaryItem> list = GetDataDictionaryList(combo.Key1, combo.Key2); combo.ItemsSource = list; } Now, my problem is, when I change the SelectedValuePath in the XAML to Code3, it doesn't work. What I bind to SelectedValue still gets the full 4 character Code from DataDictionaryItem. I even tried rerunning SetItemsSource when the SelectedValuePath was changed and no dice. Can anyone see what I need to do to get my custom combobox to wake up and use the SelectedValuePath provided if it's overridden in the XAML? Tweaking the value in the property setter in my SelectedValue bound business object is not an option.

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  • Spring MVC jQuery remote validation

    - by raulsan
    Hi, I am using Spring MVC on the server side, but in one of the pages I decided to create an AJAX validation with jQuery rather than the default Spring validation. Everything works great, except when I have to do a remote validation to check if a "title" already exists. For the javascript I have the following: var validator = $("form").validate({ rules: { title: { minlength: 6, required: true, remote: { url: location.href.substring(0,location.href.lastIndexOf('/'))+"/checkLocalArticleTitle.do", type: "GET" } }, html: { minlength: 50, required: true } }, messages: { title: { required: "A title is required.", remote: "This title already exists." } } }); Then, I use Spring-Json to make this validation and give a response: @RequestMapping("/checkLocalArticleTitle.do") public ModelAndView checkLocalArticleTitle(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Map model = new HashMap(); String result = "FALSE"; try{ String title = request.getParameter("title"); if(!EJBRequester.articleExists(title)){ result = "TRUE"; } }catch(Exception e){ System.err.println("Exception: " + e.getMessage()); } model.put("result",result); return new ModelAndView("jsonView", model); } However, this does not work and the field "title" is never validated. I think the reason for this is that I am returning an answer in the manner: {result:"TRUE"} when in fact, the answer should be: {"TRUE"} I don't know how to return a single response like this one using a ModelAndView answer. Another thing that is not working is the customized message for the "remote" validation: messages: { title: { required: "A title is required.", remote: "This title already exists." } }, The required message works, but not the remote message. I looked around, but I didn't see many people using Spring and jQuery at the same time. I would appreciate some help here.

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  • SSIS IsNumeric expression Error

    - by rmdussa
    Hi am using following exression in ssis package !ISNULL((DT_I4)Route) ? (DT_WSTR,50)("SB" + SUBSTRING(RIGHT(Route,2),1,1)) : (DT_WSTR,50)Route when the Route value is Numeric it is sucess, when it is Non-numeric failing with following description. Any help,how to resolve this issue [Derived Column [111]] Error: SSIS Error Code DTS_E_INDUCEDTRANSFORMFAILUREONERROR. The "component "Derived Column" (111)" failed because error code 0xC0049067 occurred, and the error row disposition on "output column "column_New" (679)" specifies failure on error. An error occurred on the specified object of the specified component. There may be error messages posted before this with more information about the failure. [SSIS.Pipeline] Error: SSIS Error Code DTS_E_PROCESSINPUTFAILED. The ProcessInput method on component "Derived Column" (111) failed with error code 0xC0209029 while processing input "Derived Column Input" (112). The identified component returned an error from the ProcessInput method. The error is specific to the component, but the error is fatal and will cause the Data Flow task to stop running. There may be error messages posted before this with more information about the failure.

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  • powershell / runspace in a thread

    - by Vincent
    Hello ! I'm running the following code : RunspaceConfiguration config = RunspaceConfiguration.Create(); PSSnapInException warning; config.AddPSSnapIn("Microsoft.Exchange.Management.PowerShell.Admin", out warning); if (warning != null) throw warning; Runspace thisRunspace = RunspaceFactory.CreateRunspace(config); thisRunspace.Open(); string alias = usr.AD.CN.Replace(' ', '.'); string letter = usr.AD.CN.Substring(0, 1); string email = alias + "@" + (!usr.Mdph ? Constantes.AD_DOMAIN : Constantes.MDPH_DOMAIN) + "." + Constantes.AD_LANG; string db = "CN=IS-" + letter + ",CN=SG-" + letter + ",CN=InformationStore,CN=" + ((char)letter.ToCharArray()[0] < 'K' ? Constantes.EXC_SRVC : Constantes.EXC_SRVD) + Constantes.EXC_DBMEL; string cmd = "Enable-Mailbox -Identity \"" + usr.AD.CN + "\" -Alias " + alias + " -PrimarySmtpAddress " + email + " -DisplayName \"" + usr.AD.CN + "\" -Database \"" + db + "\""; Pipeline thisPipeline = thisRunspace.CreatePipeline(cmd); thisPipeline.Invoke(); The code is running in a thread created that way : t.WorkThread = new Thread(cu.CreerUser); t.WorkThread.Start(); If I run the code directly (not through a thread), it's working. When in a thread it throws the following exception : ObjectDisposedException "The safe handle has been closed." (Translated from french) I then replaced "Open" wirh "OpenAsync" which helped not getting the previous exception. But when on Invoke I get the following exception : InvalidRunspaceStateException "Unable to call the pipeline because its state of execution is not Opened. Its current state is Opening." (Also translated from french) I'm clueless... Any help welcome !!! Thanks !!!

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  • jQuery selector issue finding image with usemap attribute

    - by Greg K
    I have an image map in my page: <div id="books"> <img src="images/books.png" width="330" height="298" border="0" \ usemap="#map_books" /> <map name="map_books" id="map_books" alt="books"> <area shape="poly" coords="17,73,81,288,210,248,254,264, ..." \ href="/about" alt="books" /> </map> </div> I have a function that tries to find the image in the document using this map: function(elemId) { // elemId = "#map_books" if ($(elemId).attr("tagName") == "MAP") { // find image using this map var selector = "img [usemap=\\" + elemId + "]"; var img = $(selector); if (img.length == 0) { console.log("Could not find image using " + selector); } } It fails to find the image. Could not find image using img [usemap=\#map_books] I've escaped the elemId because it starts with a hash and tried variations of selectors. $("img [usemap$=" + elemId.substring(1) + "]") $("img").find("[usemap=\\" + elemId + "]") Neither find the image. Any ideas?

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  • Enumerating all strings in resx

    - by Erik Hesselink
    We would like to enumerate all strings in a resource file in .NET (resx file). We want this to generate a javascript object containing all these key-value pairs. We do this now for satellite assemblies with code like this (this is VB.NET, but any example code is fine): Dim rm As ResourceManager rm = New ResourceManager([resource name], [your assembly]) Dim Rs As ResourceSet Rs = rm.GetResourceSet(Thread.CurrentThread.CurrentCulture, True, True) For Each Kvp As DictionaryEntry In Rs [Write out Kvp.Key and Kvp.Value] Next However, we haven't found a way to do this for .resx files yet, sadly. How can we enumerate all localization strings in a resx file? UPDATE: Following Dennis Myren's comment and the ideas from here, I built a ResXResourceManager. Now I can do the same with .resx files as I did with the embedded resources. Here is the code. Note that Microsoft made a needed constructor private, so I use reflection to access it. You need full trust when using this. Imports System.Globalization Imports System.Reflection Imports System.Resources Imports System.Windows.Forms Public Class ResXResourceManager Inherits ResourceManager Public Sub New(ByVal BaseName As String, ByVal ResourceDir As String) Me.New(BaseName, ResourceDir, GetType(ResXResourceSet)) End Sub Protected Sub New(ByVal BaseName As String, ByVal ResourceDir As String, ByVal UsingResourceSet As Type) Dim BaseType As Type = Me.GetType().BaseType Dim Flags As BindingFlags = BindingFlags.NonPublic Or BindingFlags.Instance Dim Constructor As ConstructorInfo = BaseType.GetConstructor(Flags, Nothing, New Type() { GetType(String), GetType(String), GetType(Type) }, Nothing) Constructor.Invoke(Me, Flags, Nothing, New Object() { BaseName, ResourceDir, UsingResourceSet }, Nothing) End Sub Protected Overrides Function GetResourceFileName(ByVal culture As CultureInfo) As String Dim FileName As String FileName = MyBase.GetResourceFileName(culture) If FileName IsNot Nothing AndAlso FileName.Length > 10 Then Return FileName.Substring(0, FileName.Length - 10) & ".resx" End If Return Nothing End Function End Class

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  • Redirect to new page if cookie doesn't exist or if the value of cookie is 'false'

    - by liquilife
    I have a DOB 'Are you over 18' script which when the form is filled out, validates if they are over 18 or not for a tobacco site I am working on. When this form is filled it stores a cookie 'ageCheck' with a value of either true or false. I'm having some issues with a bit of javascript which is stored on all the pages to determine if they can view the page or if they need to be redirected to the verification page. The javascript is supposed to set a div ID to 'display:block' if passed and if no cookie is found OR the cookie value is false is supposed to redirect them to the age verification page. However, it's just not working. I see the cookies are set correctly. Below is my code.. any help is appreciated. <script> document.body.onload = function() { var ageCheck = getCookie('ageCheck'); if ('true' == ageCheck) { document.getElementById('content').style.display = ''; } else { document.location = '/ageCheck.html'; } } function getCookie(c_name) { if (document.cookie.length > 0) { c_start = document.cookie.indexOf(c_name + "="); if (c_start != -1) { c_start = c_start + c_name.length + 1; c_end = document.cookie.indexOf(";", c_start); if (c_end == -1) c_end = document.cookie.length; return unescape(document.cookie.substring(c_start, c_end)); } } return ""; } </script>

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  • Manipulating columns of numbers in elisp

    - by ~unutbu
    I have text files with tables like this: Investment advisory and related fees receivable (161,570 ) (71,739 ) (73,135 ) Net purchases of trading investments (93,261 ) (30,701 ) (11,018 ) Other receivables 61,216 (10,352 ) (69,313 ) Restricted cash 20,658 (20,658 ) - Other current assets (39,643 ) 14,752 64 Other non-current assets 71,896 (26,639 ) (26,330 ) Since these are accounting numbers, parenthesized numbers indicate negative numbers. Dashes represent 0 or no number. I'd like to be able to mark a rectangular region such as third column above, call a function (format-column), and automatically have (-73135-11018-69313+64-26330)/1000 sitting in my kill-ring. Even better would be -73.135-11.018-69.313+0.064-26.330 but I couldn't figure out a way to transform 64 -- 0.064. This is what I've come up with: (defun format-column () "format accounting numbers in a rectangular column. format-column puts the result in the kill-ring" (interactive) (let ((p (point)) (m (mark)) ) (copy-rectangle-to-register 0 (min m p) (max m p) nil) (with-temp-buffer (insert-register 0) (goto-char (point-min)) (while (search-forward "-" nil t) (replace-match "" nil t)) (goto-char (point-min)) (while (search-forward "," nil t) (replace-match "" nil t)) (goto-char (point-min)) (while (search-forward ")" nil t) (replace-match "" nil t)) (goto-char (point-min)) (while (search-forward "(" nil t) (replace-match "-" nil t) (just-one-space) (delete-backward-char 1) ) (goto-char (point-min)) (while (search-forward "\n" nil t) (replace-match " " nil t)) (goto-char (point-min)) (kill-new (mapconcat 'identity (split-string (buffer-substring (point-min) (point-max))) "+")) (kill-region (point-min) (point-max)) (insert "(") (yank 2) (goto-char (point-min)) (while (search-forward "+-" nil t) (replace-match "-" nil t)) (goto-char (point-max)) (insert ")/1000") (kill-region (point-min) (point-max)) ) ) ) (global-set-key "\C-c\C-f" 'format-column) Although it seems to work, I'm sure this function is poorly coded. The repetitive calls to goto-char, search-forward, and replace-match and the switching from buffer to string and back to buffer seems ugly and inelegant. My entire approach may be wrong-headed, but I don't know enough elisp to make this more beautiful. Do you see a better way to write format-column, and/or could you make suggestions on how to improve this code?

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  • ISO-8859-1 to UTF8 in ASP.NET 2

    - by Gordon Carpenter-Thompson
    We've got a page which posts data to our ASP.NET app in ISO-8859-1 <head> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <title>`Sample Search Invoker`</title> </head> <body> <form name="advancedform" method="post" action="SearchResults.aspx"> <input class="field" name="SearchTextBox" type="text" /> <input class="button" name="search" type="submit" value="Search &gt;" /> </form> and in the code behind (SearchResults.aspx.cs) System.Collections.Specialized.NameValueCollection postedValues = Request.Form; String nextKey; for (int i = 0; i < postedValues.AllKeys.Length; i++) { nextKey = postedValues.AllKeys[i]; if (nextKey.Substring(0, 2) != "__") { // Get basic search text if (nextKey.EndsWith(XAEConstants.CONTROL_SearchTextBox)) { // Get search text value String sSentSearchText = postedValues[i]; System.Text.Encoding iso88591 = System.Text.Encoding.GetEncoding("iso-8859-1"); System.Text.Encoding utf8 = System.Text.Encoding.UTF8; byte[] abInput = iso88591.GetBytes(sSentSearchText); sSentSearchText = utf8.GetString(System.Text.Encoding.Convert(iso88591, utf8, abInput)); this.SearchText = sSentSearchText.Replace('<', ' ').Replace('>',' '); this.PreviousSearchText.Value = this.SearchText; } } } When we pass through Merkblätter it gets pulled out of postedValues[i] as Merkbl?tter The raw string string is Merkbl%ufffdtter Any ideas?

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  • Problem with asp.net function syntax (not returning values correctly)

    - by Phil
    I have an active directory search function: Function GetAdInfo(ByVal ADDN As String, ByVal ADCommonName As String, ByVal ADGivenName As String, ByVal ADStaffNum As String, ByVal ADEmail As String, ByVal ADDescription As String, ByVal ADTelephone As String, ByVal ADOffice As String, ByVal ADEmployeeID As String) As String Dim netBIOSname As String = Me.Request.LogonUserIdentity.Name Dim sAMAccountName As String = netBIOSname.Substring(netBIOSname.LastIndexOf("\"c) + 1) Dim defaultNamingContext As String Using rootDSE As DirectoryServices.DirectoryEntry = New DirectoryServices.DirectoryEntry("LDAP://RootDSE") defaultNamingContext = rootDSE.Properties("defaultNamingContext").Value.ToString() End Using Using searchRoot As DirectoryServices.DirectoryEntry = _ New DirectoryServices.DirectoryEntry("LDAP://" + defaultNamingContext, _ "kingkong", "kingkong", DirectoryServices.AuthenticationTypes.Secure) Using ds As DirectoryServices.DirectorySearcher = New DirectoryServices.DirectorySearcher(searchRoot) ds.Filter = String.Format("(&(objectClass=user)(objectCategory=person)(sAMAccountName={0}))", sAMAccountName) Dim sr As DirectoryServices.SearchResult = ds.FindOne() 'If sr.Properties("displayName").Count = 0 Then whatever = string.empty '' (how to check nulls when required) ' End If ADDN = (sr.Properties("displayName")(0).ToString()) ADCommonName = (sr.Properties("cn")(0).ToString()) ADGivenName = (sr.Properties("givenname")(0).ToString()) ADStaffNum = (sr.Properties("sn")(0).ToString()) ADEmail = (sr.Properties("mail")(0).ToString()) ADDescription = (sr.Properties("description")(0).ToString()) ADTelephone = (sr.Properties("telephonenumber")(0).ToString()) ADOffice = (sr.Properties("physicalDeliveryOfficeName")(0).ToString()) ' ADEmployeeID = (sr.Properties("employeeID")(0).ToString()) End Using End Using Return ADDN Return ADCommonName Return ADGivenName Return ADStaffNum Return ADEmail Return ADDescription Return ADTelephone Return ADOffice ' Return ADEmployeeID 'have commented out employee id as i dont have one so it is throwing null errors. ' im not ready to put labels on the frontend or catch this info yet End Function The function appears to work, as when I put a breakpoint at the end, the variables such as ADDN do have the correct values. Then I call the function in my page_load like this: GetAdInfo(ADDN, ADCommonName, ADGivenName, ADStaffnum, ADEmail, ADDescription, ADTelephone, ADOffice, ADEmployeeID) Then I try to response.write out one of the vars to test like this: Response.Write(ADDN) But the value is empty. Please can someone tell me what I am doing wrong. Thanks

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  • Bypass all cacheing on jQuery.autocomplete(1.02)

    - by technicalbloke
    I am using jQuery.autocomplete(1.02) on my search box and I want exact string and substring matching. I don't care (yet!) about the database load, I'm happy for it to fire off a query every keystroke and bypass the caching entirely - I just don't want anything missed. To this end I have tried setting cacheLength=1, the minimum permitted, but the autocomplete function refuses to fire off a GET request for each key up. searchbox GET_request 'a' -> http://localhost/service_search_request?q=a 'ar' -> http://localhost/service_search_request?q=ar 'ars' -> http://localhost/service_search_request?q=ars Instead, it sends the first and the third and misses the second, giving me the wrong results for 'ar' :-/ I've cleared my cache and sessions but it looks like some sort of caching is still going on. AFAIK I have no proxying going on and I'm shift-refreshing each time. It looks likely then that this behavior is from jQuery.autocomplete itself. So my questions are... A) Does this seem likely? i.e. is it a feature, or maybe a bug? B) If so is there a clean way around it?... C) If not, what autocomplete would you use instead? Naturally D) No you're just using it incorrectly you douche! is always a possibility, and indeed the one I'd prefer having spent time going down this road - assuming it comes with a link to the docs I've failed to find / read! Cheers, Roger :)

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  • Error "Input length must be multiple of 8 when decrypting with padded cipher"

    - by Ross Peoples
    I am trying to move a project from C# to Java for a learning exercise. I am still very new to Java, but I have a TripleDES class in C# that encrypts strings and returns a string value of the encrypted byte array. Here is my C# code: using System; using System.IO; using System.Collections.Generic; using System.Security.Cryptography; using System.Text; namespace tDocc.Classes { /// <summary> /// Triple DES encryption class /// </summary> public static class TripleDES { private static byte[] key = { 110, 32, 73, 24, 125, 66, 75, 18, 79, 150, 211, 122, 213, 14, 156, 136, 171, 218, 119, 240, 81, 142, 23, 4 }; private static byte[] iv = { 25, 117, 68, 23, 99, 78, 231, 219 }; /// <summary> /// Encrypt a string to an encrypted byte array /// </summary> /// <param name="plainText">Text to encrypt</param> /// <returns>Encrypted byte array</returns> public static byte[] Encrypt(string plainText) { UTF8Encoding utf8encoder = new UTF8Encoding(); byte[] inputInBytes = utf8encoder.GetBytes(plainText); TripleDESCryptoServiceProvider tdesProvider = new TripleDESCryptoServiceProvider(); ICryptoTransform cryptoTransform = tdesProvider.CreateEncryptor(key, iv); MemoryStream encryptedStream = new MemoryStream(); CryptoStream cryptStream = new CryptoStream(encryptedStream, cryptoTransform, CryptoStreamMode.Write); cryptStream.Write(inputInBytes, 0, inputInBytes.Length); cryptStream.FlushFinalBlock(); encryptedStream.Position = 0; byte[] result = new byte[encryptedStream.Length]; encryptedStream.Read(result, 0, (int)encryptedStream.Length); cryptStream.Close(); return result; } /// <summary> /// Decrypt a byte array to a string /// </summary> /// <param name="inputInBytes">Encrypted byte array</param> /// <returns>Decrypted string</returns> public static string Decrypt(byte[] inputInBytes) { UTF8Encoding utf8encoder = new UTF8Encoding(); TripleDESCryptoServiceProvider tdesProvider = new TripleDESCryptoServiceProvider(); ICryptoTransform cryptoTransform = tdesProvider.CreateDecryptor(key, iv); MemoryStream decryptedStream = new MemoryStream(); CryptoStream cryptStream = new CryptoStream(decryptedStream, cryptoTransform, CryptoStreamMode.Write); cryptStream.Write(inputInBytes, 0, inputInBytes.Length); cryptStream.FlushFinalBlock(); decryptedStream.Position = 0; byte[] result = new byte[decryptedStream.Length]; decryptedStream.Read(result, 0, (int)decryptedStream.Length); cryptStream.Close(); UTF8Encoding myutf = new UTF8Encoding(); return myutf.GetString(result); } /// <summary> /// Decrypt an encrypted string /// </summary> /// <param name="text">Encrypted text</param> /// <returns>Decrypted string</returns> public static string DecryptText(string text) { if (text == "") { return text; } return Decrypt(Convert.FromBase64String(text)); } /// <summary> /// Encrypt a string /// </summary> /// <param name="text">Unencrypted text</param> /// <returns>Encrypted string</returns> public static string EncryptText(string text) { if (text == "") { return text; } return Convert.ToBase64String(Encrypt(text)); } } /// <summary> /// Random number generator /// </summary> public static class RandomGenerator { /// <summary> /// Generate random number /// </summary> /// <param name="length">Number of randomizations</param> /// <returns>Random number</returns> public static int GenerateNumber(int length) { byte[] randomSeq = new byte[length]; new RNGCryptoServiceProvider().GetBytes(randomSeq); int code = Environment.TickCount; foreach (byte b in randomSeq) { code += (int)b; } return code; } } /// <summary> /// Hash generator class /// </summary> public static class Hasher { /// <summary> /// Hash type /// </summary> public enum eHashType { /// <summary> /// MD5 hash. Quick but collisions are more likely. This should not be used for anything important /// </summary> MD5 = 0, /// <summary> /// SHA1 hash. Quick and secure. This is a popular method for hashing passwords /// </summary> SHA1 = 1, /// <summary> /// SHA256 hash. Slower than SHA1, but more secure. Used for encryption keys /// </summary> SHA256 = 2, /// <summary> /// SHA348 hash. Even slower than SHA256, but offers more security /// </summary> SHA348 = 3, /// <summary> /// SHA512 hash. Slowest but most secure. Probably overkill for most applications /// </summary> SHA512 = 4, /// <summary> /// Derrived from MD5, but only returns 12 digits /// </summary> Digit12 = 5 } /// <summary> /// Hashes text using a specific hashing method /// </summary> /// <param name="text">Input text</param> /// <param name="hash">Hash method</param> /// <returns>Hashed text</returns> public static string GetHash(string text, eHashType hash) { if (text == "") { return text; } if (hash == eHashType.MD5) { MD5CryptoServiceProvider hasher = new MD5CryptoServiceProvider(); return ByteToHex(hasher.ComputeHash(Encoding.ASCII.GetBytes(text))); } else if (hash == eHashType.SHA1) { SHA1Managed hasher = new SHA1Managed(); return ByteToHex(hasher.ComputeHash(Encoding.ASCII.GetBytes(text))); } else if (hash == eHashType.SHA256) { SHA256Managed hasher = new SHA256Managed(); return ByteToHex(hasher.ComputeHash(Encoding.ASCII.GetBytes(text))); } else if (hash == eHashType.SHA348) { SHA384Managed hasher = new SHA384Managed(); return ByteToHex(hasher.ComputeHash(Encoding.ASCII.GetBytes(text))); } else if (hash == eHashType.SHA512) { SHA512Managed hasher = new SHA512Managed(); return ByteToHex(hasher.ComputeHash(Encoding.ASCII.GetBytes(text))); } else if (hash == eHashType.Digit12) { MD5CryptoServiceProvider hasher = new MD5CryptoServiceProvider(); string newHash = ByteToHex(hasher.ComputeHash(Encoding.ASCII.GetBytes(text))); return newHash.Substring(0, 12); } return ""; } /// <summary> /// Generates a hash based on a file's contents. Used for detecting changes to a file and testing for duplicate files /// </summary> /// <param name="info">FileInfo object for the file to be hashed</param> /// <param name="hash">Hash method</param> /// <returns>Hash string representing the contents of the file</returns> public static string GetHash(FileInfo info, eHashType hash) { FileStream hashStream = new FileStream(info.FullName, FileMode.Open, FileAccess.Read); string hashString = ""; if (hash == eHashType.MD5) { MD5CryptoServiceProvider hasher = new MD5CryptoServiceProvider(); hashString = ByteToHex(hasher.ComputeHash(hashStream)); } else if (hash == eHashType.SHA1) { SHA1Managed hasher = new SHA1Managed(); hashString = ByteToHex(hasher.ComputeHash(hashStream)); } else if (hash == eHashType.SHA256) { SHA256Managed hasher = new SHA256Managed(); hashString = ByteToHex(hasher.ComputeHash(hashStream)); } else if (hash == eHashType.SHA348) { SHA384Managed hasher = new SHA384Managed(); hashString = ByteToHex(hasher.ComputeHash(hashStream)); } else if (hash == eHashType.SHA512) { SHA512Managed hasher = new SHA512Managed(); hashString = ByteToHex(hasher.ComputeHash(hashStream)); } hashStream.Close(); hashStream.Dispose(); hashStream = null; return hashString; } /// <summary> /// Converts a byte array to a hex string /// </summary> /// <param name="data">Byte array</param> /// <returns>Hex string</returns> public static string ByteToHex(byte[] data) { StringBuilder builder = new StringBuilder(); foreach (byte hashByte in data) { builder.Append(string.Format("{0:X1}", hashByte)); } return builder.ToString(); } /// <summary> /// Converts a hex string to a byte array /// </summary> /// <param name="hexString">Hex string</param> /// <returns>Byte array</returns> public static byte[] HexToByte(string hexString) { byte[] returnBytes = new byte[hexString.Length / 2]; for (int i = 0; i <= returnBytes.Length - 1; i++) { returnBytes[i] = byte.Parse(hexString.Substring(i * 2, 2), System.Globalization.NumberStyles.HexNumber); } return returnBytes; } } } And her is what I've got for Java code so far, but I'm getting the error "Input length must be multiple of 8 when decrypting with padded cipher" when I run the test on this: import java.security.InvalidAlgorithmParameterException; import java.security.InvalidKeyException; import javax.crypto.Cipher; import javax.crypto.NoSuchPaddingException; import javax.crypto.SecretKey; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import com.tdocc.utils.Base64; public class TripleDES { private static byte[] keyBytes = { 110, 32, 73, 24, 125, 66, 75, 18, 79, (byte)150, (byte)211, 122, (byte)213, 14, (byte)156, (byte)136, (byte)171, (byte)218, 119, (byte)240, 81, (byte)142, 23, 4 }; private static byte[] ivBytes = { 25, 117, 68, 23, 99, 78, (byte)231, (byte)219 }; public static String encryptText(String plainText) { try { if (plainText.isEmpty()) return plainText; return Base64.decode(TripleDES.encrypt(plainText)).toString(); } catch (Exception e) { e.printStackTrace(); } return null; } public static byte[] encrypt(String plainText) throws InvalidKeyException, InvalidAlgorithmParameterException, NoSuchPaddingException { try { final SecretKey key = new SecretKeySpec(keyBytes, "DESede"); final IvParameterSpec iv = new IvParameterSpec(ivBytes); final Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, key, iv); final byte[] plainTextBytes = plainText.getBytes("utf-8"); final byte[] cipherText = cipher.doFinal(plainTextBytes); return cipherText; } catch (Exception e) { e.printStackTrace(); } return null; } public static String decryptText(String message) { try { if (message.isEmpty()) return message; else return TripleDES.decrypt(message.getBytes()); } catch (Exception e) { e.printStackTrace(); } return null; } public static String decrypt(byte[] message) { try { final SecretKey key = new SecretKeySpec(keyBytes, "DESede"); final IvParameterSpec iv = new IvParameterSpec(ivBytes); final Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding"); cipher.init(Cipher.DECRYPT_MODE, key, iv); final byte[] plainText = cipher.doFinal(message); return plainText.toString(); } catch (Exception e) { e.printStackTrace(); } return null; } }

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  • CSharpCodeProvider 'cannot find metadata file' Compiling Plugin Code With Mono

    - by Jason Champion
    I have some code in an XML file that I load and compile at runtime in an application. This works fine on Windows, but under Mono I get assembly reference errors. Here's the examine code in question: public static bool CompileSpell(Spell spell) { CSharpCodeProvider prov = new CSharpCodeProvider(); CompilerParameters cp = new CompilerParameters(); cp.GenerateExecutable = true; cp.GenerateInMemory = true; cp.ReferencedAssemblies.Add("system.dll"); cp.ReferencedAssemblies.Add("system.xml.dll"); cp.ReferencedAssemblies.Add("BasternaeMud.dll"); cp.ReferencedAssemblies.Add("ZoneData.dll"); Log.Trace("Compiling spell '" + spell.Name + "'."); StringBuilder sb = new StringBuilder(); int idx = spell.FileName.IndexOf('.'); string file = spell.FileName; if (idx > 0) { file = spell.FileName.Substring(0, idx); } int lines = GenerateWithMain(sb, spell.Code, "BasternaeMud"); CompilerResults cr = prov.CompileAssemblyFromSource(cp,sb.ToString()); .... The specific errors I get in the compiler results are: cannot find metadata file 'system.dll' at line 0 column 0. cannot find metadata file 'system.xml.dll' at line 0 column 0. Mono obviously doesn't like the way I add referenced assemblies to the code I'm compiling for system.xml and system.xml.dll. The other two assemblies add fine, which is no surprise because they're the code that the compiler is actually executing from and exist in the executable directory. Any clue what I need to do to fix this? Maybe I could just drop those DLLs in the executable directory, but that feels like a dumb idea.

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  • Regex pattern failing

    - by Scott Chamberlain
    I am trying a substring to find from the beginning of the string to the point that has the escape sequence "\r\n\r\n" my regex is Regex completeCall = new Regex(@"^.+?\r\n\r\n", RegexOptions.Compiled); it works great as long as you only have strings like 123\r\n\r\n however once you have the pattern 123\r\n 456\r\n\r\n the pattern no longer matches. Any advice on what I am doing wrong? Regex completeCall = new Regex(@"^.+?\r\n\r\n", RegexOptions.Compiled); Regex junkLine = new Regex(@"^\D", RegexOptions.Compiled); private void ClientThread() { StringBuilder stringBuffer = new StringBuilder(); (...) while(true) { (...) Match match = completeCall.Match(stringBuffer.ToString()); while (Match.Success) //once stringBuffer has somthing like "123\r\n 456\r\n\r\n" Match.Success always returns false. { if (junkLine.IsMatch(match.Value)) { (...) } else { (...) } stringBuffer.Remove(0, match.Length); // remove the processed string match = completeCall.Match(stringBuffer.ToString()); // check to see if more than 1 call happened while the thread was sleeping. } Thread.Sleep(1000); }

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  • attaching js files to one js file but with JQuery error !

    - by uzay95
    Hi, I wanted to create one js file which includes every js files to attach them to the head tag where it is. But i am getting this error Microsoft JScript runtime error: Object expected this is my code: var baseUrl = document.location.protocol + "//" + document.location.host + '/yabant/'; // To find root path with virtual directory function ResolveUrl(url) { if (url.indexOf("~/") == 0) { url = baseUrl + url.substring(2); } return url; } // JS dosyalarinin tek noktadan yönetilmesi function addJavascript(jsname, pos) { var th = document.getElementsByTagName(pos)[0]; var s = document.createElement('script'); s.setAttribute('type', 'text/javascript'); s.setAttribute('src', jsname); th.appendChild(s); } addJavascript(ResolveUrl('~/js/1_jquery-1.4.2.min.js'), 'head'); $(document).ready(function() { addJavascript(ResolveUrl('~/js/5_json_parse.js'), 'head'); addJavascript(ResolveUrl('~/js/3_jquery.colorbox-min.js'), 'head'); addJavascript(ResolveUrl('~/js/4_AjaxErrorHandling.js'), 'head'); addJavascript(ResolveUrl('~/js/6_jsSiniflar.js'), 'head'); addJavascript(ResolveUrl('~/js/yabanYeni.js'), 'head'); addJavascript(ResolveUrl('~/js/7_ResimBul.js'), 'head'); addJavascript(ResolveUrl('~/js/8_HaberEkle.js'), 'head'); addJavascript(ResolveUrl('~/js/9_etiketIslemleri.js'), 'head'); addJavascript(ResolveUrl('~/js/bugun.js'), 'head'); addJavascript(ResolveUrl('~/js/yaban.js'), 'head'); addJavascript(ResolveUrl('~/embed/bitgravity/functions.js'), 'head'); }); Paths are right. I wanted to show you folder structure and watch panel: Any help would be greatly appreciated.

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  • How to Convert Non-English Characters to English Using JavaScript

    - by Adam Right
    I have a c# function which converts all non-english characters to proper characters for a given text. like as follows public static string convertString(string phrase) { int maxLength = 100; string str = phrase.ToLower(); int i = str.IndexOfAny( new char[] { 's','ç','ö','g','ü','i'}); //if any non-english charr exists,replace it with proper char if (i > -1) { StringBuilder outPut = new StringBuilder(str); outPut.Replace('ö', 'o'); outPut.Replace('ç', 'c'); outPut.Replace('s', 's'); outPut.Replace('i', 'i'); outPut.Replace('g', 'g'); outPut.Replace('ü', 'u'); str = outPut.ToString(); } // if there are other invalid chars, convert them into blank spaces str = Regex.Replace(str, @"[^a-z0-9\s-]", ""); // convert multiple spaces and hyphens into one space str = Regex.Replace(str, @"[\s-]+", " ").Trim(); // cut and trim string str = str.Substring(0, str.Length <= maxLength ? str.Length : maxLength).Trim(); // add hyphens str = Regex.Replace(str, @"\s", "-"); return str; } but i should use same function on client side with javascript. is it possible to convert above function to js ? waiting all kinds of suggestion. thanks in advance..

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