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  • HttpClient automatically retires before the response is received from server

    - by RD
    Hi all, I'm come upon a wierd problem with java HttpClient library. Specifically the library automatically retries my request (POST requests) even before the response is received from the server. Moreover the weirder problem is that this only happens on specific hosts (machines). So the end result is if a post request succeeds, then there may be an exact same post request coming to the server which the server can't handle. Now, I do want the retry behavior, but it should behave intuitively. Anyone faced this kind of problem before, or is there a way to configure http client to wait for a specific time before retrying. I'm not sure what going wrong here.

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  • JSF2 - what scope for f:ajax elements?

    - by Konrad Garus
    I have this form: <h:form> <h:outputText value="Tag:" /> <h:inputText value="#{entryRecorder.tag}"> <f:ajax render="category" /> </h:inputText> <h:outputText value="Category:" /> <h:inputText value="#{entryRecorder.category}" id="category" /> </h:form> What I'm trying to achieve: When you type in the "tag" field, the entryRecorder.tag field is updated with what was typed. By some logic upon this action the bean also updates its category field. This change should be reflected in the form. Questions: What scope shall I use for EntryRecorder? Request may not be satisfactory for multiple AJAX requests, while session will not work with multiple browser windows per one session. How can I register my updateCategory() action in EntryRecorder so that it is triggered when the bean is updated?

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  • Strange error occurring when using wcf to run query against sql server

    - by vondip
    Hi all, I am building an asp.net application, using II6 on windows server 2003 (vps hosting). I am confronted with an error I didn't receive on my development machine (windows 7, iis 7.5, 64 bit). When my wcf service tries launching my query running against a local sql server this is the error I receive: Memory gates checking failed because the free memory (43732992 bytes) is less than 5% of total memory. As a result, the service will not be available for incoming requests. To resolve this, either reduce the load on the machine or adjust the value of minFreeMemoryPercentageToActivateService on the serviceHostingEnvironment config element. and ideas??

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  • Mercurial: Problem converting Windows cvs repository to mercurial

    - by jalperin
    I’m trying to convert an existing Windows CVS repository to Mercurial and getting the following response and error: C:\Windows\system32>hg convert c:\users\jeff\webs\shelter-cvs\shelter assuming destination shelter-hg initializing destination shelter-hg repository connecting to :local:c:\cvs abort: unexpected response from CVS server (expected "Valid-requests", but got 'E cvs [server aborted]: c:\\cvs: no such repository\n') Here’s the background: The repository was created with TortoiseCVS so I believe it’s actually cvsnt. I can properly checkout from the repository using either the command line or the TortoiseCVS gui, so I think it is set up correctly. I'm trying to convert a working copy, not the repository itself I’m running Windows 7, 64-bit I’ve installed TortoiseHG and enabled the convert extension.

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  • Linq To SQL - Specified cast is not valid - SingleOrDefault()

    - by NullReference
    I am trying to do the following... Request request = (from r in db.Requests where r.Status == "Processing" && r.Locked == false select r).SingleOrDefault(); It is throwing the following exception... Message: Specified cast is not valid. StackTrace: at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult) at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries) at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query) at System.Data.Linq.DataQuery1.System.Linq.IQueryProvider.Execute[S](Expression expression) at System.Linq.Queryable.SingleOrDefault[TSource](IQueryable1 source) at GDRequestProcessor.Worker.GetNextRequest() Can anyone help me? Thanks in advance!

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  • Optimizations employed by ORM's

    - by Kartoch
    I'm teaching JEE, especially JPA, Spring and Spring MVC. As I have not so much experience in large projects, it is difficult to know what to present to students about optimisation of ORM. At the present time, I present some classic optimisation tricks: prepared statements (most of ORM implicitely uses it by default) first and second-level caches "write first, optimize later" it is possible to switch off ORM and send SQL commands directly to the database for very frequent, specialized and costly requests Is there any other point the community see about other way to optimize ORM ? I'm especially interested by DAO patterns...

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  • How to enable HTTP response caching in Spring Boot

    - by Samuli Kärkkäinen
    I have implemented a REST server using Spring Boot 1.0.2. I'm having trouble preventing Spring from setting HTTP headers that disable HTTP caching. My controller is as following: @Controller public class MyRestController { @RequestMapping(value = "/someUrl", method = RequestMethod.GET) public @ResponseBody ResponseEntity<String> myMethod( HttpServletResponse httpResponse) throws SQLException { return new ResponseEntity<String>("{}", HttpStatus.OK); } } All HTTP responses contain the following headers: Cache-Control: no-cache, no-store, max-age=0, must-revalidate Expires: 0 Pragma: no-cache I've tried the following to remove or change those headers: Call setCacheSeconds(-1) in the controller. Call httpResponse.setHeader("Cache-Control", "max-age=123") in the controller. Define @Bean that returns WebContentInterceptor for which I've called setCacheSeconds(-1). Set property spring.resources.cache-period to -1 or a positive value in application.properties. None of the above have had any effect. How do I disable or change these headers for all or individual requests in Spring Boot?

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  • Random "Not Found" error with Silverlight accessing ASP.NET Web Services

    - by user245822
    I'm developing an application with Silverlight 3 and ASP.NET Web Services, which uses Linq to SQL to get data from my SQL Server database. Randomly when the user causes an action to get information from any of my web service methods, Silverlight throws the exception "The remote server returned an error: NotFound.", of type "CommunicationException", with the InnerException status of "System.Net.WebExceptionStatus.UnknownError". Almost 10% of requests gets this error. If the user tries to get the same information again, normally the request has no erros and the user gets the data. When debugging in Visual Studio only Silverlight stops on the exception, and I see no reason for the web service not being found.

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  • TFS Load Testing Web Tests

    - by durilai
    I am configuring a load test and am curious/confused on settings. I am testing an intranet website, that is expected to have 6000 concurrent users. My employer had some previous consultant tell them that the load test users does not matter and that we need to worry about requests/second. They have previously determined that those 6000 users would generate 30 rps, while I feel that is not correct we need to show that we can exceed that number. The previous load test was set for only 200 users and the results showed that it did exceed the 200 rps. They were happy with the results, but that is not how I understand this. My question is, if we need to support 6000 concurrent users should I just set my users to 6000 and run, or is the rps an adequate piece of data to rely on? Any help is appreciated. Thanks

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  • Client side caching in GWT

    - by Silfverstrom
    We have a gwt-client, which recieves quite a lot of data from our servers. Logically, i want to cache the data on the client side, sparing the server from unnecessary requests. As of today i have let it up to my models to handle the caching of data, which doesn't scale very well. It's also become a problem since different developers in our team develop their own "caching" functionality, which floods the project with duplications. I'm thinking about how one could implement a "single point of entry", that handles all the caching, leaving the models clueless about how the caching is handled. Does anyone have any experience with client side caching in GWT? Is there a standard approach that can be implemented?

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  • Cross-domain jQuery using YQL gives robots.txt error

    - by Jens Roland
    On the page http://qxlapps.dk/test.htm I am trying to perform an Ajax load from another domain, qxlapp.dk. I am using James Padolsey's xdomainajax.js plugin from: http://james.padolsey.com/javascript/cross-domain-requests-with-jquery/ When I open my test page, I get no output, but FireBug shows the JSON result, including the error message: "forbidden":"robots.txt for the domain disallows crawling for url: http://qxlapp.dk/projects/dagens_kup/show.php". The robots.txt on the qxlapp.dk domain contains the following: User-agent: Yahoo Pipes 2.0 Allow: / User-agent: * Allow: / So I don't see what the problem is? Shouldn't it pull the page just fine with those settings?

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  • Device driver with generic communication media layer

    - by Tom
    Greetings all, I'm trying to implement driver for an embedded device with generic communication media layer. Not sure what is the best way to do it so I'm seeking an advice from more experienced stackoverflow users:). Basically we've got devices around the country communicating with our head office. Usual form of communication is over TCP/IP, but could be also using usb, RF dongle, IR, etc. The plan is to have object corresponding with each of these devices, handling the proprietary protocol on one side and requests/responses from other internal systems on the other. The thing is how create something generic in between the media and the handling objects. I had a play around with the TCP dispatcher using boost.asio but trying to create something generic seems like a nightmare :). Anybody tried to do something like that? What is the best way how to do it? Cheers, Tom

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  • Log response-time in restlet-based webservice

    - by amarillion
    What is the simplest way to log the response-time for a restlet-based webservice? I want to make sure that our webservice has a reasonable response time. So I want to be able to keep an eye on response times, and do something about the requests that take too long. The closest thing I could find is this recipe: http://www.naviquan.com/blog/restlet-cookbook-log, it explains how to change the log format. But there doesn't seem to be a parameter for response times, so probably a completely different approach is needed.

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  • SQL Server 2005, Sudden increase of connections - SharePoint 2007

    - by CrazyNick
    We observed that sudden increase of SQL connections during a specific hour, it is a backend of a SharePoint 2007 Farm. From SharePoint 2007 Perspective: 1. Incremental crawling is scheduled at that time and few of the Timer jobs (normal timer jobs) are scheduled to run every mins / per 10mins. 2. Number of user requests are less. From SQL Server 2005 Perspective: 1. Transaction log backup is scheduled at that time 2. No other scheduled jobs are running at that time. so, how to narrow down the issue, what would be causing the sudden SQL connection increase?

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  • A good machine learning technique to weed out good URLs from bad

    - by git-noob
    Hi, I have an application that needs to discriminate between good HTTP GET requests and bad. For example: http://somesite.com?passes=dodgy+parameter # BAD http://anothersite.com?passes=a+good+parameter # GOOD My system can make a binary decision about whether or not a URL is good or bad - but ideally I would like it to predict whether or not a previously unseen URL is good or bad. http://some-new-site.com?passes=a+really+dodgy+parameter # BAD I feel the need for a support vector machine (SVM) ... but I need to learn machine learning. Some questions: 1) Is an SVM appropriate for this task? 2) Can I train it with the raw URLs? - without explicitly specifying 'features' 3) How many URLs will I need for it to be good at predictions? 4) What kind of SVM kernel should I use? 5) After I train it, how do I keep it up to date? 6) How do I test unseen URLs again the SVM to decide whether it's good or bad? I

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  • How to mask tilde (~) character in C# MVC routing table?

    - by AC
    I'm moving my home-baked web site to MVC and got the trouble with url routing. The site already serves several links that contain tilde (~) character in the path; something like http://.../~files/... http://.../~ws/... and I want each of them are handled by separate controller, like filesController, wsController, so my route table looks like routes.MapRoute( "files", "~files/{*prms}", new { controller = "files", action = "index", prms = "" } ); routes.MapRoute( "ws", "~ws/{*prms}", new { controller = "ws", action = "index", prms = "" } ); ... but when I try to get the result I got the error saying "The route URL cannot start with a '/' or '~' character and it cannot contain a '?' character." As I understand those characters have the special meaning in ASP.net but is it possible to mask them somehow, at least tilde? Should I parse and route requests like this myself? What the best practice to handle urls like this? Thanks!

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  • IIS7 URL Rewrite with dynamic subdomains.

    - by arri.me
    My goal is to implement the following scheme using the subdomain and path as attributes: Use a wildcard DNS entry that routes any subdomain to the root site: Example: *.example.com ex: http://xyz.example.com to http://example.com Next I want to rewrite the requests to point to a specific page, passing both the subdomain and the request path as attributes. Example: http://xyz123.example.com/images/header.jpg to http://example.com/get.aspx?id=xyz123&path=/images/header.jpg I've seen several questions on here regarding similar goals, but not quite the same. I'm new to using rewrite rules, so any help is appreciated. I will update this as I make progress.

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  • WCF, net.tcp, and ASP.NET development server

    - by bryanjonker
    I'm setting up a net.tcp WCF service using instructions here: http://blogs.msdn.com/swiss_dpe_team/archive/2008/02/08/iis-7-support-for-non-http-protocols.aspx One of the steps says to do the following: "If you open the IIS7 management console and you look at the advance setting of our IIS7HostedService Web Application, you will see that in the Enabled Protocols section just http is defined. You now have to add net.tcp (separated by a comma), so that our service will be able to respond also to TCP requests." This is fine, but what if I want to use the Cassini / VS2010 ASP.NET development server to debug (hitting F5 or cntrl-F5)? I don't think there's a way to change the settings in that IIS. Or is there? Are other programmers just so awesome that they don't need to go through the debugger? Or do they use wsHttpBinding?

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  • Load balancing a console application or service

    - by David
    So it's easy to load balance an ASP.NET web application. You set up a load balancer between two servers, and if the web server isn't responding on Port 80, it won't receive requests. Are there any proven techniques for doing this for a C# console application or Windows service that takes actions of its own volition? Are there any frameworks for knowing if peer processes are alive or dead, doing heartbeats, etc? I've been experimenting a bit with NServiceBus and it seems like, for certain kinds of applications, it would help to have most of the work done as a response to an event, which makes it more like a web application, actually, and therefore easier to scale and load balance with multiple processes, but I feel like that's a half-baked solution since in most cases there usually needs to be some concept of a "master" process that's responsible for getting work started.

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  • Android compatibility with Restlet/JSON/Jackson

    - by Cookie
    Hi there, I'm currently working on a webservice-client for Android. I'm using a Java client library which provides an abstraction for interaction with the service. The client library works on normal machines. However, when I use the classes in my Android project, some calls don't return a result on Android, the background-service stops working at the first of those commands. Wireshark shows a tcp exchange, the server gets the requests. There is no exceptions or anything. Something in the serialization/deserialization semms not to work. I'm using the newest version of Jackson libraries (1.5.3) and the restlet jar in the android edition. Is there any known problems with Jackson and Android? Which code and libraries are compatible with Android? Thanks in advance.

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  • Quick question on session security.

    - by Scarface
    Hey guys, I was scanning my site for security and I noticed that it was possible for non users to send requests and post information, so I decided to put login checks on all information posts. I was wondering if it was a good way to keep a session id that is created by md5(uniqid()); in a session variable $_SESSION['id']=md5(uniqid()); for each user and then store that in a database under active users for that user. Then when a user tries to insert information, verify that their $_SESSION['id'] variable is equal to the one in the database where the username equals their $_SESSION['username']. What are your ideas on this guys? Thanks in advance!

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  • 404 Error - HEAD request on default page

    - by Matt
    I am working on a project where we are about to go to internal release. So we are working to clean up the small problems before then. I was looking at our logs and noticed a high number of 404 errors. On further inspection it seems that all of them are related to HEAD requests. I haven't been able to find any substantive information about the preferred method for handling this in a standards compliant manner. Is there anything out there that can point out the proper way to handle that.

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  • Modify the filter chain - Or select servlet to respond to request using filter

    - by klonq
    I am trying to use a filter to map requests. I am trying to do this for two reasons, firstly to dynamically generate URI's and have them mapped to the appropriate servlet and secondly to catch URI's which are not registered and handle them appropriately. So I'm using a catch-all filter to process the URI and determine the response. I would like some way of modifying the filter chain, or some way to set the servlet which responds to the request from within the filter. I have been unsuccessful using filterConfig.getServletContext().getRequestDispatcher().forward() to send to jsp, ideally though I would like to map to a servlet but can't figure out how. The reason I am not doing this from within a servlet is that I have some URIs which are fixed within web.xml and if I use a catch-all servlet those URIs do not get mapped. Is this possible, is it clean or it going to get really messy?

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  • Security and authentication in web services

    - by King
    Lets say we have a website that uses a web service for all of its functionality (i.e. retrieving and updating data from/to db), how does the web service authenticate requests? As I understand it, in a traditional java "website" a user provides a username & password, and upon validation a jsessionid is assigned to the user (client browser). Every time the client browser asks the website for something, the site checks for the jsessionid ensuring that the user is registered and authenticated. Is there a web services equivalent of this? If yes, what?

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  • Getting Rails Application Running Under IronRuby Rack

    - by NotMyself
    Anyone else playing with ironruby? I have successfully got the IronRuby.Rails.Example project running on my local machine under IIS 5.1. I am now attempting to get my own demo rails site running in the same way. My web.config is slightly different from the example project. I am attempting to only use what was distributed with IronRuby 1.0 and what I have installed using gems. I am getting the following error which doesn't give me a lot to go on: D:/demo/config/boot.rb:66:in `exit': exit (SystemExit) After trying many different things, I think it is having a problem finding gems. I have attached my web config and ironrack.log. Does anyone have pointers on what I am doing wrong? Thanks! <?xml version="1.0"?> <configuration> <configSections> <!-- custom configuration section for DLR hosting --> <section name="microsoft.scripting" type="Microsoft.Scripting.Hosting.Configuration.Section, Microsoft.Scripting" requirePermission="false"/> </configSections> <system.webServer> <handlers> <!-- clear all other handlers first. Don't do this if you have other handlers you want to run --> <clear/> <!-- This hooks up the HttpHandler which will dispatch all requests to Rack --> <add name="IronRuby" path="*" verb="*" type="IronRuby.Rack.HttpHandlerFactory, IronRuby.Rack" resourceType="Unspecified" requireAccess="Read" preCondition="integratedMode"/> </handlers> </system.webServer> <system.web> <!-- make this true if you want to debug any of the DLR code, IronRuby.Rack, or your own managed code --> <compilation debug="true"/> <httpHandlers> <!-- clear all other handlers first. Don't do this if you have other handlers you want to run --> <clear/> <!-- This hooks up the HttpHandler which will dispatch all requests to Rack --> <add path="*" verb="*" type="IronRuby.Rack.HttpHandlerFactory, IronRuby.Rack" /> </httpHandlers> </system.web> <!-- DLR configuration. Set debugMode to "true" if you want to debug your dynamic language code with VS --> <microsoft.scripting debugMode="false"> <options> <!-- Library paths: make sure these paths are correct --> <!--<set option="LibraryPaths" value="..\..\..\Languages\Ruby\libs\; ..\..\..\..\External.LCA_RESTRICTED\Languages\Ruby\ruby-1.8.6p368\lib\ruby\site_ruby\1.8\; ..\..\..\..\External.LCA_RESTRICTED\Languages\Ruby\ruby-1.8.6p368\lib\ruby\1.8\"/>--> <set option="LibraryPaths" value="C:\IronRuby\lib\IronRuby;C:\IronRuby\lib\ruby\1.8;C:\IronRuby\lib\ruby\site_ruby;C:\IronRuby\lib\ruby\site_ruby\1.8"/> </options> </microsoft.scripting> <appSettings> <add key="AppRoot" value="."/> <add key="Log" value="ironrack.log"/> <!-- <add key="GemPath" value="..\..\..\..\External.LCA_RESTRICTED\Languages\Ruby\ruby-1.8.6p368\lib\ruby\gems\1.8"/> --> <add key="GemPath" value="C:\IronRuby\Lib\ironruby\gems\1.8\gems"/> <add key="RackEnv" value="production"/> </appSettings> </configuration> === Booting ironruby-rack at 4/15/2010 1:27:12 PM [DEBUG] >>> TOPLEVEL_BINDING = binding => Setting GEM_PATH: 'C:\\IronRuby\\Lib\\ironruby\\gems\\1.8\\gems' => Setting RACK_ENV: 'production' => Loading RubyGems [DEBUG] >>> require 'rubygems' => Loading Rack >=1.0.0 [DEBUG] >>> gem 'rack', '>=1.0.0';require 'rack' => Loaded rack-1.1 => Application root: 'D:\\demo' => Loading Rack application [DEBUG] >>> Rack::Builder.new { ( require "config/environment" ENV['RAILS_ENV'] = 'development' use Rails::Rack::LogTailer use Rails::Rack::Static run ActionController::Dispatcher.new ) }.to_app exit D:/demo/config/boot.rb:66:in `exit': exit (SystemExit) from D:/demo/config/boot.rb:66:in `load_rails_gem' from D:/demo/config/boot.rb:54:in `load_initializer' from D:/demo/config/boot.rb:38:in `run' from D:/demo/config/boot.rb:11:in `boot!' from D:/demo/config/boot.rb:110 from C:/IronRuby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' from C:/IronRuby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' from D:/demo/config/environment.rb:7 from C:/IronRuby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' from C:/IronRuby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' from (eval):1 from C:/IronRuby/lib/ironruby/gems/1.8/gems/rack-1.1.0/lib/rack/builder.rb:46:in `instance_eval' from C:/IronRuby/lib/ironruby/gems/1.8/gems/rack-1.1.0/lib/rack/builder.rb:46:in `initialize' from (eval):0 from D:\Dev\ironruby\ironruby-ironruby-20bc41b\Merlin\Main\Hosts\IronRuby.Rack\RubyEngine.cs:52:in `Execute' from D:\Dev\ironruby\ironruby-ironruby-20bc41b\Merlin\Main\Hosts\IronRuby.Rack\RubyEngine.cs:45:in `Execute' from D:\Dev\ironruby\ironruby-ironruby-20bc41b\Merlin\Main\Hosts\IronRuby.Rack\Application.cs:68:in `Rackup' from D:\Dev\ironruby\ironruby-ironruby-20bc41b\Merlin\Main\Hosts\IronRuby.Rack\Application.cs:32:in `.ctor' from D:\Dev\ironruby\ironruby-ironruby-20bc41b\Merlin\Main\Hosts\IronRuby.Rack\HttpHandlerFactory.cs:37:in `GetHandler' from System.Web:0:in `MapHttpHandler' from System.Web:0:in `System.Web.HttpApplication.IExecutionStep.Execute' from System.Web:0:in `ExecuteStep' from System.Web:0:in `ResumeSteps' from System.Web:0:in `System.Web.IHttpAsyncHandler.BeginProcessRequest' from System.Web:0:in `ProcessRequestInternal' from System.Web:0:in `ProcessRequestNoDemand' from System.Web:0:in `ProcessRequest'

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