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• How to handle all exceptions in a web java project

  - by Nick Donovan

  I am doing an web java project about an hotel reservation. I am using, sql, hibernate, java server pages. I want to know how can I redirect an incoming exception to an error.jsp file . There are a lot of java code , and a lot of jsp file. So I want to rederict every exception that I haven't handle to an error page, is there any way to do it ? An exception can come from everywhere and I can't know and handle them all ( for example an user can write to much data in an textfield, and it will generate me an sql exception for data to long) Thank you, sorry for my english.

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• performance monitoring tools for multi-tenant web application

  - by Anton

  We have a need to monitor performance of our java web app. We are looking for some tolls which can help us with this task. The major difficulty is that we are SaaS provider with multi-tenant server architecture with hundreds of customers running on the same hardware. So far we tried commercial products like DynaTrace and Coradinat but unfortunately they don't get the job done so far. What we need is a simple report which would tell us if we had performance problems on each customer site in a specified period of time. Mostly it will be response time per customer but also we will need some more specifics based on the URLs. please let me know if someone had any experience with setting up such monitoring. Thanks!

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• Deriving PathInfo class in web routes?

  - by drozzy

  I am reading the web-routes tutorial in Happstack, and I have no idea what this is doing: $(derivePathInfo ''Sitemap) class PathInfo a where toPathSegments :: a -> [String] fromPathSegments :: URLParser a The doc simply says: we use template-haskell to derive an instance of PathInfo for the Sitemap type. but where does it "store" it? I thought haskell had no state, and is PathInfo our own thing, or is it part of happstack? If someone could explain this, for dummies? Thanks.

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• Regular expression to validate name in .NET multilingual web application

  - by BT

  Hi, how can i write a regular expression to validate name field in a multilingual web application, i want to validate the name field for non-English languages e.g. Spanish or German, and we need to make sure that no one enter digits or special characters. I'm using .NET. I believe we can't use expression as below for non-English language. ^[a-zA-Z]{1,20}$ Any help will be highly appreciated! Solution: I'm using this regular expression ^\p{L}[\p{L}\p{Pd}\x27]*\p{L}$ , and the below MSISDN article was very helpful: MSDN - Regular Expression Also below tool is very helpful, in validating your regular expression: Regex Builder

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• Detecting regional settings (List Separator) from web

  - by Toms Mikoss

  After having the unpleasant surprise that Comma Seperated Value (CSV) files are not necessarily comma-separated, I'm trying to find out if there is any way to detect what the regional settings list separator value is on the client machine from http request. Scenario is as follows: A user can download some data in CSV format from web site (RoR, if it matters). That CSV file is generated on the fly, sent to the user, and most of the time double-clicked and opened in MS Excel on Windows machine at the destination. Now, if the user has ',' set as the list separator, the data is properly arranged in columns, but if any other separator (';' is widely used here) is set, it all just gets thrown into a single column. So, is there any way to detect what separator is used on the client machine, and generate the file accordingly? I have a sinking feeling that it is not, but I'd like to be sure before I pass the 'can't be done, sorry' line to the customer :)

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• continuous integration web service

  - by Josh Moore

  I am in a position where I could become a team leader of a team distributed over two countries. This team would be the tech. team for a start up company that we plan to bootstrap on limited funds. So I am trying to find out ways to minimize upfront expenses. Right now we are planning to use Java and will have a lot of junit tests. I am planing on using github for VCS and lighthouse for a bug tracker. In addition I want to add a continuous integration server but I do not know of any continuous integration servers that are offered as a web service. Does anybody know if there are continuous integration servers available in a software as a service model? P.S. if anybody knows were I can get these three services at one location that would be great to know to.

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• Amazon AWS S3 to Force Download Mp3 File instead of Stream It

  - by Calua

  Hi everybody, I'm using Amazon AWS S3 to put the mp3 file then allow our site visitor to download the mp3 from Amazon AWS. I use S3Fox to manage the file, everything seems working fine until recently we got many complaints from visitor that the mp3 was streamed via the browser instead of displaying browser save dialog. I try for some mp3 and notice that for some mp3, the save dialog box is appear, and for some others they're streamed via browser. What can I do to force that the Mp3 file will be downloaded instead of streamed via web browser.... Any help would be much appreciated. Thanks

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• Javascript function, on web page close

  - by AXheladini

  Hello there, I have an problem that i can not solve. The problem is this way: When i close my page on some browser i want an message box to appear and to ask me if I really want to close the page or not. logically: click on x (close tab on web browser) and than the box appears with two buttons yes and now, if i click yes the page will be closed if i click no the page will not close. I know there must be some javascript or ajax code but i can not configure it by my self.

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• Are there such things as Email Hooks?

  - by viatropos

  After hearing about git commit hooks, I was thinking maybe there are such things as email hooks... Is it possible for me to build a program that says "hey, you just received an email, now run this ruby script"? Something like a GMail Web Hook. Is there anything out there like that? I mean I could build a cron thing that checked my email all the time, but maybe there's a more formal way. Looking for an online email system to do this with, not say my Mac Mail.

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• Using gmail as SMTP server in Java web app is slow

  - by Annie

  Hi, I was wondering if anyone might be able to explain to me why it's taking nearly 30 seconds each time my Java web app sends an email using Gmail's SMTP server? See the following timestamps: 13/04/2010-22:24:27:281 DEBUG test.service.impl.SynchronousEmailService - Before sending mail. 13/04/2010-22:24:52:625 DEBUG test.service.impl.SynchronousEmailService - After sending mail. I'm using spring's JavaMailSender class with the following settings: email.host=smtp.gmail.com [email protected] email.password=mypassword email.port=465 mail.smtp.auth.required=true Note that the mail is getting sent and I'm receiving it fine, there's just this delay which is resulting in a slow experience for the application user. If you know how I can diagnose the problem myself that would be good too :)

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• Generating Dynamic web pages without server side scripting

  - by Microkernel

  Hi guys, I am trying to control a media device which has lot of multimedia content that it can play using another device(remote control device) like an ipad connected to the LAN. (UPnP) I want the media device to be able to send the content listing to the remote device so that it will be rendered as a webpage on the remote controller. And actions on the webpages needs to be sent to the the device as commands to execute (like play, pause, next etc). The media device is an embedded device, hence can't have any server side scripting, all has to be done on the client side. I want the page rendered to be HTML5. So, is it possible to generate dynamic HTML5 pages using just client side scripting? Thanks a lot. I am an embedded systems developer hence clueless about the web designing stuff.

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• Direct web URL to PayPal transaction

  - by tags2k

  Having implemented PayPal's Website Payments Standard, I'd like to link to the details view of a transaction from my site's back end - just a simple direct web URL to the PayPal side. I don't know why this is tricky but when I try to get it from being logged in to the PayPal system it seems very obfuscated, in this form: history.paypal.com/uk/cgi-bin/webscr?cmd=_history-details&info=[looks like some kind of GUID]&ptype=4&history_cache=[huge encoded string] I'm guessing it's by design but it's not very helpful if you want a quick way to jump to a transaction's details. I've tried the https://www.paypal.com/vst/id=1234 form (also with co.uk as I am UK-based) recommended on a few sites I saw in my search, but I am told that: The transaction ID in your link is invalid. This happens even when copying the transaction ID directly from PayPal's back-end order listing. Is there a reliable way to directly link to an order / transaction details page in PayPal?

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• What is the best tool to achieve this API design?

  - by Jose Fernandez

  Our web app offers a service that allows a "Publisher" to create a website (we give them a CMS system) that is ready to provide this service to "Members" (think Shopify). We have some possible clients that wish to become "Publishers" but they already have existing websites (vbulletin, word press blog, etc) with their own user base. We wish to develop an API that would allow these "Publishers" to keep using their own websites, and embed our services into them. Our main business requirement is that once "Members" are logged into the "Publishers" existing system, they should be able to also access our website without having to log-in again OR have to create another account there. The process should be seamless to the "Member" and "Publishers" should not have to sync their user base with our system. We also want to use an existing API authentication/authorization system instead of creating our own (OAuth, OpenID, etc) What would be the best way to use OAuth to achieve this sigle-sign on design? If OAuth is not the best tool, is there any other one out there that fits our requirements?

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• Create SOAP message from WSDL using axiom

  - by code-gijoe

  Hi, I'm a starting a project which consist in sending a request to a web-service (which is already available) and parsing the response. I have the WSDL and URL endpoints. Does anyone have a startup tutorial on how to build something from there? I would like to use Axis2 + Axiom to send the service request and receive and process the response. I'm using eclipse as dev env. I've been search for a tut on how to do this but with no success. Any suggestion would be greatly appreciated!

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• Which langauge should i use for Artificial intelligence on web projects

  - by Mirage

  I have to do one project for my thesis involving Artificial intelligence, collaborative filtering and machine learning methods. I only know PHP/mysq/JS, and there is not much AI stuff examples in PHP. There are some books on AI on internet but they use Java , Python. Now I have to apply AI techniques on web application. Which language should i choose java or python. I searhed on internet that I can call java classes inside my php so that can help as as I am very good at php I have also seen that python can also be used with php as well So which way should I go and roughly how much it will take me to learn java I have done java basics but that was 6 years ago

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• Starting a new process in a asp.net web service

  - by Deumber

  I have the following code: public void BeginConvert(object data) { ConverterData cObject = (ConverterData)data; string argument = string.Format("-i \"{0}\" -b {1} \"{2}\"", cObject.Source, compression, cObject.Destiny); Process converterProcess = new Process(); converterProcess.StartInfo.FileName = ffPath; converterProcess.StartInfo.Arguments = argument; converterProcess.StartInfo.WindowStyle = ProcessWindowStyle.Hidden; converterProcess.Start(); converterProcess.WaitForExit(); } I use it in a webservice, i start it in a new thread and it return exit code 1 (error, i'm trying to do a video convertion with ffmpeg library), i impersonate ASP.NET to use a local account with permissions to read and write files, when i run it in my machine running or debugging it works but know thta the web service is running in IIS doest'n. Could someone help me?

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• Blog engines for ASP.Net (maybe MVC) web sites

  - by J. Pablo Fernández

  I've built a web site on ASP.NET MVC and one little section of it should be a blog. I'm looking for a blog to integrate. In the worst case scenario it'd be a WordPress with a custom skin and RSS integration to the rest of the site. The best would be to have an ASP.NET MVC add-on, but I can live with ASP.NET WebForms. Do you have any recomendations on the engine? I've been checking out BlogEngine.Net and I'd like to have some other ideas to compare. Anything in particular you can point to regarding this integration?

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• How to query data from a password protected https website using C# .NET

  - by Addie

  I'd like my application to query a csv file from a secure website. I have no experience with web programming so I'd appreciate detailed instructions. Currently I have the user login to the site, manually query the csv, and have my application load the file locally. I'd like to automate this by having the user enter his login information, authenticating him on the website, and querying the data. The application is written in C# .NET. The url of the site is: https://www2.emidas.com/default.asp. I've tested the following code already and am able to access the file once the user has already authenticated himself and created a manual query. System.Net.WebClient Client = new WebClient(); Stream strm = Client.OpenRead("https://www3.emidas.com/users/<username>/file.csv");

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• Setting property default values for a Web User Control

  - by Jeremy Holland

  I am trying to build a web user control and set some default values for its properties in the code-behind like this: [DefaultValue(typeof(int), "50")] public int Height { get; set; } [DefaultValue(typeof(string), "string.Empty")] public string FamilyName { get; set; } [DefaultValue(typeof(Color), "Orange")] public System.Drawing.Color ForeColor { get; set; } When I add the user control to the page and call it without any properties: <uc1:Usercontrol ID="uc" runat="server" /> the default values are not set and every property is 0 or null. What am I doing wrong? Thanks.

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• My ASP.NET page is making postback on web server and not on local host

  - by Rizwan Aaqil

  I have created a website in ASP.NET = www.vif-tech.com/BidsOnline When I am running it on Localhost using Visual Studio 2008, its running perfectly without any postback because I am using Ajax Update Panels (where data is changing constantly). But when I am running from my web server i.e. www.vif-tech.com/BidsOnline, its making postbacks every seconds. Even I tried changing connection string on my localhost and tried connecting to main database (not on my localhost), it's still making postbacks. Is there some error in my DB or page ?

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• Is a Service Bus a good option to communicate with multiple external servers?

  - by PFreitas

  We are developing an application that communicates, via web services or TCP/IP sockets, with multiple servers (up to 50 different external companies). Basically, the exchanged messages are the same (XML), but depending on the inputs of our application we should call 1 or more external servers. The benefits we would expect of introducing a Service Bus in the architecture would be: 1- Remove the need to manage all point-to-point configurations (all the 50 endpoints); 2- Simplify the communication layer of our application by having only one server to talk to; Is a Service Bus a good architectural option for this scenario? What is the best (simplest) Service Bus for this kind of communication? I read a few MSDN articles on Azure Service Bus Relay, but it didn’t seem to fit our needs. Am I wrong? Thanks for your help.

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• Websphere exception handling

  - by Benjamin

  Hi all, From a security standpoint, what is the best solution to handle application errors with Websphere? I've been thinking of creating a class that is called every time an application error is generated, log the error and display a generic error message to the users. In PHP this can be achieved using the set_exception_handler() function. Is there something similar for websphere that could be configured in the web.xml? I've found codes like this on the internet: <error-page> <error-code>500</error-code> <location>/servlet/ExceptionHandlerServlet</location> </error-page> But that would only work with "500" HTTP error codes. I really want something generic that catches everything. Something like a class that implements a certain interface which can have access to all information about the error. Thanks for your time.

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• Not getting redirection to custom error page using custom errors - ASP.Net

  - by weevie

  Here's my Application_OnError event sink in global.asax.vb: Sub Application_OnError(ByVal sender As Object, ByVal e As EventArgs) Dim innerMostException As Exception = getInnerMostException(Me.Context.Error) If TypeOf innerMostException Is AccessDeniedException Then Security.LogAccessDeniedOccurrence(DirectCast(innerMostException, AccessDeniedException)) Dim fourOhThree As Integer = DirectCast(HttpStatusCode.Forbidden, Integer) Throw New HttpException(fourOhThree, innerMostException.Message, innerMostException) End If End Sub You'll see that if we've got an innermost Exception of type AccessDeniedException we throw a new HTTPExcpetion with a status code of 403 AKA 'forbidden' Here's the relevant web.config entry: <customErrors defaultRedirect="~/Application/ServerError.aspx" mode="On"> <error statusCode="403" redirect="~/Secure/AccessDenied.aspx" /> </customErrors> So what we're expecting is a redirect to the AccessDenied.aspx page. What we get is a redirect to the ServerError.aspx page. We've also tried this: Sub Application_OnError(ByVal sender As Object, ByVal e As EventArgs) Dim innerMostException As Exception = getInnerMostException(Me.Context.Error) If TypeOf innerMostException Is AccessDeniedException Then Security.LogAccessDeniedOccurrence(DirectCast(innerMostException, AccessDeniedException)) Context.Response.StatusCode = DirectCast(HttpStatusCode.Forbidden, Integer) End If End Sub Which unsuprisingly doesn't work either. Any ideas what we're doing wrong?

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• Deploying asp.net application(.Net4.0) package on to IIS 6.0

  - by Vinod.Nair

  Hi , I have created a asp.net application project in Visual Studio 2010 (.net 4.0). I had published it using Project- Build Deployment Package. It generated .zip file along with files having extension " .deply.cmd", ".SetParameters.xml", ".SourceManifest.xml" and readme.txt, in Application (obj\Release\Package) folder My intension is to host the package on test server which has IIS6.0, Windows Server 2003 R2 x64 Edition service pack 2. It has .net 4.0. I tried by running the cmd file but its showed me an message as below: ERROR: The system was unable to find the specified registry key or value. msdeploy.exe is not found on this machine. Please install Web Deploy before execute the script. any help pl....

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• Accessing Securised Web Service

  - by Xstahef

  Hi, I need to connect to a provider's web service with a Windows Form application. He gives me a certificate to access it but I have a security problem. I have done these following steps : Add certificate to personal store (on IE & Firefox) Generate a proxy with the remote wsdl (no problem) Use this code to call a method : `using (service1.MessagesService m = new service1.MessagesService()) { X509Certificate crt = new X509Certificate(@"C:\OpenSSL\bin\thecert.p12",string.Empty); m.ClientCertificates.Add(crt); var result = m.AuthoriseTransaction(aut); this.textBox1.AppendText(result.id.ToString()); }` I have the following error : The underlying connection was closed: Could not establish trust relationship for the channel SSL / TLS. Thanks for your help

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