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Where does Tomcat append / to directory paths?

- by Anonymouse

Suppose my Tomcat webapps directory looks like this: webapps/ webapps/fooapp/ webapps/fooapp/WEB-INF/ webapps/fooapp/WEB-INF/web.xml webapps/fooapp/bardir/ When I make a GET request for /fooapp/bardir, Tomcat sees that webapps/fooapp/bardir is a directory and sends back a 302 to /fooapp/bardir/ (with a slash at the end). Here is my question: Where in the Tomcat source code does this take place? (I'm looking at 6.0.x but a correct answer for any version would be a great starting point.) The only reference material I can find on this subject is in the Catalina Functional Specifications which states, regarding the Default Servlet: On each HTTP GET request processed by this servlet, the following processing shall be performed: [...] If the requested resource is a directory: If the request path does not end with "/", redirect to a corresponding path with "/" appended so that relative references in welcome files are resolved correctly. However, this functionality does not appear to be in org.apache.catalina.servlets.DefaultServlet; or at least, it's not there exclusively: if I replace the default servlet in web.xml with a servlet whose servlet-class does not exist, directory paths still come back 302 to add the slash, while every other request comes back with an error as expected.

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How to bind a table in a dataset to a WPF datagrid in C# and XAML

- by Jim Thomas

I have been searching to hours for something very simple: bind a WPF datagrid to a datatable in order to see the columns at design-time. I can’t get any of the examples to work for me. Here is the C# code to populate the datatable InfoWork inside the dataset info: info = new Info(); InfoTableAdapters.InfoWorkTableAdapter adapter = new InfoTableAdapters.InfoWorkTableAdapter(); adapter.Fill(info.InfoWork); The problem is no matter how I declare ‘info’ or ‘infoWork’ Visual Studio/XAML can’t find it. I have tried: <Window.Resources> <ObjectDataProvider x:Key="infoWork" ObjectType="{x:Type local:info}" /> </Window.Resources> I have also tried this example from wpf.codeplex, but XAML doesn’t even like the “local:” keyword! <Window.Resources> <local:info x:Key="infoWork"/> </Window.Resources> There are really two main questions here: 1) How do I declare the table InfoWork in C# so that XAML can see it? I tried declaring it Public in the window class that XAML exists in with no success. 2) How do I declare the windows resource in XAML, specifcally the datatable inside the dataset? Out of curiosity, is there a reason that ItemsSource just doesn't show up as a property that be set in the properties design window?

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Multicore solr on Ubuntu 10.04 working for anyone?

- by coleifer

Following instructions from the two sites below, I've installed tomcat6 and solr 1.4 http://gist.github.com/204638 https://wiki.fourkitchens.com/display/TECH/Solr+1.4+on+Ubuntu+9.10+and+CentOS+5 I have successfully got it up and running on a server running 9.04 with multicore support, but on the 10.04 I can't seem to get it to work. I am able to reach localhost:xxxx/solr/ on the 10.04 box and see a single link to the Solr Admin, but following the link takes me to a 404 page with the following output: /solr/admin/ HTTP Status 404 - missing core name in path The requested resource (missing core name in path) is not available I am also unable to access /solr/site1/ as I would except - it similarly returns a 404  <cores adminPath="/admin/cores"> <core name="site1" instanceDir="site1" /> <core name="site2" instanceDir="site2" /> </cores>  <Context docBase="/var/solr/solr.war" debug="0" privileged="true" allowLinking="true" crossContext="true"> <Environment name="solr/home" type="java.lang.String" value="/var/solr" override="true" /> </Context>

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Android - Widget to Play Video (onclick trouble)

- by Josh

I am trying to make a simple widget that will play a movie from the sdcard when clicked on. This seems simple enough, and by following tutorials I've come up with the following code, but it seems the onclick is never setup. Manifest: <receiver android:name="WidgetProvider" android:label="DVD Cover"> <intent-filter> <action android:name="android.appwidget.action.APPWIDGET_UPDATE"/> </intent-filter> <meta-data android:name="android.appwidget.provider" android:resource="@xml/appwidget_info_2x4"/> </receiver> Layout (widget.xml): <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/holder" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#ff777777" > <ImageView android:id="@+id/cover" android:layout_width="wrap_content" android:layout_height="fill_parent" android:textColor="#000000" /> </LinearLayout> appwidget.xml: <?xml version="1.0" encoding="utf-8"?> <appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android" android:minWidth="200dip" android:minHeight="300dip" android:updatePeriodMillis="180000" android:initialLayout="@layout/widget" > </appwidget-provider> WidgetProvider.java: public class WidgetProvider extends AppWidgetProvider { public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) { String movieurl = Environment.getExternalStorageDirectory().getPath() + "/Movie.mp4"; Intent notificationIntent = new Intent(Intent.ACTION_VIEW); notificationIntent.setDataAndType(Uri.parse(movieurl), "video/*"); PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent,0); // Get the layout for the App Widget and attach an on-click listener // to the button RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget); views.setOnClickPendingIntent(R.id.holder, contentIntent); // Tell the AppWidgetManager to perform an update on the current app widget appWidgetManager.updateAppWidget(appWidgetIds, views); } } Any help would be greatly appreciated. Thanks, Josh

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Basic Tomcat Servlet error.

- by ajay

package mypackage; import java.io.*; import javax.servlet.http.*; import javax.servlet.*; public class Hello extends HttpServlet { public void doGet (HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { PrintWriter out = res.getWriter(); out.println("Hello, world!"); out.close(); } } web.xml file is as follows: <?xml version="1.0" encoding="ISO-8859-1"?> <web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4"> <display-name>Hello, World Application</display-name> <description> This is a simple web application with a source code organization based on the recommendations of the Application Developer's Guide. </description> <servlet> <servlet-name>HelloServlet</servlet-name> <servlet-class>mypackage.Hello</servlet-class> </servlet> <servlet-mapping> <servlet-name>HelloServlet</servlet-name> <url-pattern>/hello</url-pattern> </servlet-mapping> </web-app> I am then doing ant all , ant reload and also /etc/init.d/tomcat restart But I get this error on browser: HTTP Status 404 - /hello/ type Status report message /hello/ description The requested resource (/hello/) is not available. Apache Tomcat/6.0.26 What could be wrong?

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Windows Azure ASP.NET MVC Role behaves strangely when redirecting from HTTP to HTTPS

- by Rinat Abdullin

Subj. I've got an ASP.NET 2 MVC Worker Role Application, that does not differ much from the default template. When attempting redirect from HTTP to HTTPS (this happens when we access constroller secured by the usual RequireSSL attribute implementation) we get blank page with "Bad Request" message. IntelliTrace shows this: Thrown: "The file '/Views/Home/LogOnUserControl.aspx' does not exist." (System.Web.HttpException) Call stack is really short: [External Code] App_Web_vfahw7gz.dll!ASP.views_shared_site_master.__Render__control1(System.Web.UI.HtmlTextWriter __w = {unknown}, System.Web.UI.Control parameterContainer = {unknown}) [External Code] App_Web_bsbqxr44.dll!ASP.views_home_index_aspx.ProcessRequest(System.Web.HttpContext context = {unknown}) [External Code] User control reference is the usual one in /Views/Shared/Site.Master: <div id="logindisplay"> <% Html.RenderPartial("LogOnUserControl"); %> </div> And partial view LogOnUserControl.ashx is located in Views/Shared (and it is ASHX, not ASPX). Problem shows up, when we try to access site pages, that require auth and redirect. These pages are secured by RequireSSL attribute (Redirect == true): [AttributeUsage(AttributeTargets.Method | AttributeTargets.Class, Inherited = true, AllowMultiple = false)] public sealed class RequireSslAttribute : FilterAttribute, IAuthorizationFilter { public bool Redirect { get; set; } // Methods public void OnAuthorization(AuthorizationContext filterContext) { // this get's messy, when we are running custom ports // within the local dev fabric. // hence we disable code in the debug #if !DEBUG if (filterContext == null) { throw new ArgumentNullException("filterContext"); } if (filterContext.HttpContext.Request.IsSecureConnection) return; var canRedirect = string.Equals(filterContext.HttpContext.Request.HttpMethod, "GET", StringComparison.OrdinalIgnoreCase); if (canRedirect && Redirect) { var builder = new UriBuilder { Scheme = "https", Host = filterContext.HttpContext.Request.Url.Host, Path = filterContext.HttpContext.Request.RawUrl }; filterContext.Result = new RedirectResult(builder.ToString()); } else { throw new HttpException(0x193, "Access forbidden. The requested resource requires an SSL connection."); } #endif } } Obviously we compile in RELEASE for this case. Does anybody have any idea, what could cause this strange exception and how to get rid of it?

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What is wrong with my Basic Authentication in my Browser?

- by Pure.Krome

Hi folks, i'm trying to goto the following url :- http://user1:pass1@localhost:1234/api/users?format=xml nothing to complex. Notice how i've got the username/password in the url? this, i believe, is for basic authentication. When I do that, the Request Headers are MISSING the 'Authorize' header. Er... that's not right :( I have anonymous authentication only setup on the site. I don't want to have anon off and basic turned on .. because not all of the site requires basic.. only a few action methods. So .. why is this not working? Is this something to do with the fact my code is not sending a 401 challenge or some crap? For What It's Worth, my site is ASP.NET MVC1 running on IIS7 (and the same thing happens when i run it on cassini). Update: If this is an illegal way of calling a resource using basic auth (ala security flaw) .. then is this possible to do, for an ASP.NET MVC website .. per action method (and not the entire site, per say)?

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Is it possible to template a template in WPF XAML?

- by imekon

Is it possible to use templates within templates? For instance, I have the following two templates: <HierarchicalDataTemplate x:Key="RecursiveTemplate" ItemsSource="{Binding Children}"> <StackPanel Margin="1" Orientation="Horizontal"> <Ellipse Fill="DarkGreen" Width="14" Height="14"/> <TextBlock MouseDown="OnTreeMouseDown" TargetUpdated="OnTargetUpdated" Visibility="{Binding Editing, Converter={StaticResource visibilityInverter}}" Margin="5" Text="{Binding Name}"/> <TextBox PreviewKeyDown="OnTreeKeyDown" Visibility="{Binding Editing, Converter={StaticResource visibilityConverter}}" Margin="2" Text="{Binding Name}"/> </StackPanel> </HierarchicalDataTemplate> <HierarchicalDataTemplate x:Key="ContainerTemplate" ItemsSource="{Binding Children}"> <StackPanel Margin="1" Orientation="Horizontal"> <Ellipse Fill="DarkBlue" Width="14" Height="14"/> <TextBlock MouseDown="OnTreeMouseDown" TargetUpdated="OnTargetUpdated" Visibility="{Binding Editing, Converter={StaticResource visibilityInverter}}" Margin="5" Text="{Binding Name}"/> <TextBox PreviewKeyDown="OnTreeKeyDown" Visibility="{Binding Editing, Converter={StaticResource visibilityConverter}}" Margin="2" Text="{Binding Name}"/> </StackPanel> </HierarchicalDataTemplate> There's a section of identical XAML: <TextBlock MouseDown="OnTreeMouseDown" TargetUpdated="OnTargetUpdated" Visibility="{Binding Editing, Converter={StaticResource visibilityInverter}}" Margin="5" Text="{Binding Name}"/> <TextBox PreviewKeyDown="OnTreeKeyDown" Visibility="{Binding Editing, Converter={StaticResource visibilityConverter}}" Margin="2" Text="{Binding Name}"/> Is it possible to move that to a resource and refer to it by name, rather than repeat it?

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What computer science topic am I trying to describe?

- by ItzWarty

I've been programming for around... 6-8 years, and I've begun to realize that I don't really know what really happens at the low-ish level when I do something like int i = j%348 The thing is, I know what j%348 does, it divides j by 348 and finds the remainder. What I don't know is HOW the computer does this. Similarly, I know that try { blah(); }catch(Exception e){ blah2(); } will invoke blah and if blah throws, it will invoke blah2... however, I have no idea how the computer does this instead of err... crashing or ending execution. And I figure that in order for me to get "better" at programming, I should probably know what my code is really doing. [This would probably also help me optimize and... err... not do stupid things] I figure that what I'm asking for is probably something huge taught in universities or something, but to be honest, if I could learn a little, I would be happy. The point of the question is: What topic/computer-science-course am I asking about? Because in all honesty, I don't know. Since I don't know what the topic is called, I'm unable to actually find a book or online resource to learn about the topic, so I'm sort of stuck. I'd be eternally thankful if someone helped me =/

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How to run an app in Tomcat?

- by artaxerxe

Hi! I have put my project in tomcat_home/webapps/ directory. The structure is : project_name/WEB-INF/classes. in WEB-INF i have put my web.xml descriptor. The problem is that when i try to run the application, it doesn't find the files. The error is: The requested resource () is not available. My web.xml content is: <?xml version="1.0" encoding="ISO-8859-1"?> <web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4"> <servlet> <servlet-name>Chapter1 Servlet</servlet-name> <servlet-class>Ch1Servlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>Chapter1 Servlet</servlet-name> <servlet-url>/Serv1</servlet-url> </servlet-mapping> </web-app> I have also restarted the server, but it doesn't want to work. Any suggestions?

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Mimic remote API or extend existing django model

- by drozzy

I am in a process of designing a client for a REST-ful web-service. What is the best way to go about representing the remote resource locally in my django application? For example if the API exposes resources such as: List of Cars Car Detail Car Search Dealership summary So far I have thought of two different approaches to take: Try to wrangle the django's models.Model to mimic the native feel of it. So I could try to get some class called Car to have methods like Car.objects.all() and such. This kind of breaks down on Car Search resources. Implement a Data Access Layer class, with custom methods like: Car.get_all() Car.get(id) CarSearch.search("blah") So I will be creating some custom looking classes. Has anyone encoutered a similar problem? Perhaps working with some external API's (i.e. twitter?) Any advice is welcome. PS: Please let me know if some part of question is confusing, as I had trouble putting it in precise terms.

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CPU friendly infinite loop

- by Adi

Writing an infinite loop is simple: while(true){ //add whatever break condition here } But this will trash the CPU performance. This execution thread will take as much as possible from CPU's power. What is the best way to lower the impact on CPU? Adding some Thread.Sleep(n) should do the trick, but setting a high timeout value for Sleep() method may indicate an unresponsive application to the operating system. Let's say I need to perform a task each minute or so in a console app. I need to keep Main() running in an "infinite loop" while a timer will fire the event that will do the job. I would like to keep Main() with the lowest impact on CPU. What methods do you suggest. Sleep() can be ok, but as I already mentioned, this might indicate an unresponsive thread to the operating system. LATER EDIT: I want to explain better what I am looking for: I need a console app not Windows service. Console apps can simulate the Windows services on Windows Mobile 6.x systems with Compact Framework. I need a way to keep the app alive as long as the Windows Mobile device is running. We all know that the console app runs as long as its static Main() function runs, so I need a way to prevent Main() function exit. In special situations (like: updating the app), I need to request the app to stop, so I need to infinitely loop and test for some exit condition. For example, this is why Console.ReadLine() is no use for me. There is no exit condition check. Regarding the above, I still want Main() function as resource friendly as possible. Let asside the fingerprint of the function that checks for the exit condition.

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Android: forward search queries to one single activity that handles search

- by Stefan Klumpp

I have an activity handling search (ACTIVITY_1), which works perfectly when I use the search (via SEARCH button on the phone) within/from this activity. However, when I use search from another activity (ACTIVITY_2..x) by implementing onNewIntent and forward the query string to my Search_Activity.class (ACTIVITY_1) @Override protected void onNewIntent(Intent intent) { Log.i(TAG, "onNewIntent()"); if (Intent.ACTION_SEARCH.equals(intent.getAction())) { Log.i(TAG, "===== Intent: ACTION_SEARCH ====="); Intent myIntent = new Intent(getBaseContext(), Search_Activity.class); myIntent.setAction(Intent.ACTION_SEARCH); myIntent.putExtra(SearchManager.QUERY, intent.getStringExtra(SearchManager.QUERY)); startActivity(myIntent); } } it always pauses ACTIVITY_2 first and then goes to onCreate() of ACTIVITY_2. Why does it recreate my ACTIVITY_2 when it is already there and doesn't go to onNewIntent directly? Is there another way I can forward search queries directly to ACTIVITY_1? For example via a setting in the Manifest.xml Is it possible to generally forward all search queries automatically to ACTIVITY_1 without even implementing onNewIntent in all the other activities? Currently I have to put an <intent-filter> in every single activity to "activate" my custom search there and forward the query then to the activity that handles search via the onNewIntent (as shown above). <activity android:name=".Another_Activity" android:theme="@style/MyTheme"> <intent-filter> <action android:name="android.intent.action.SEARCH" /> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> <meta-data android:name="android.app.searchable" android:resource="@xml/searchable" /> </activity>

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How to deploy RSWebParts.cab manually?

- by denni

I'm using the SSRS 2005 Web parts to display my reports in a MOSS 2007 SP1 Portal. I have successfully installed the Web parts in my development, testing, and UAT servers using the following command: stsadm -o addwppack -filename path/to/RSWebParts.cab. But when I tried running the same command in the production server, it will give me the following error: This solution contains no resources scoped for a Web application and cannot be deployed to a particular Web application. I know I usually will get this kind of error message when I tried to deploy my custom solutions having no Web application resources (such as web.config entries) to a specific Web application. But this is not my custom solution, it is an out-of-the-box SSRS Web part and it does have resources scoped to a Web application. I tried to even use different combination of the command by providing the -url, -globalinstall, and -force switches but it still give the same error. The configuration of the 4 servers are exactly the same, both from software and hardware perspectives. All other features are working properly on the production server. I even tried to extract the cab file manually to the bin folder of my Web application, then modify the Web.config manually to include the SafeControl element (copied from the manifest.xml inside the cab file). But it gave me an error saying it couldn't find the resources file. Even though, I extracted the whole file, including the resource files in the bin folder. Is there anyone who can help me resolve the problem? Thanks a lot.

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gwt maven war plugin configuration problem

- by Din

I am developing a gwt application in maven. In this I am using maven war plugin. Everything works fine. When I give mvn install command it builds abc.war file in target folder. But it is not copying compiled javascript files ("module1" and "module2" directories present in target) to war directory. I want to get newly compiled javascript files in war directory. How to achieve this? pom.xml file <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>example</groupId> <artifactId>example</artifactId> <packaging>war</packaging> <version>12</version> <name>gwt-maven-archetype-project</name> <properties>  <gwt.version>2.1.0</gwt.version> <noServer>false</noServer> <skipTest>true</skipTest> <gwt.localWorkers>1</gwt.localWorkers> <JAVA_HOME>C:\Program Files\Java\jdk1.6.0_22</JAVA_HOME>  </properties> <dependencies>  </dependencies> <build> <finalName>abc</finalName> <outputDirectory>war/WEB-INF/classes</outputDirectory> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <verbose>true</verbose> <executable>${JAVA_HOME}\bin\java.exe</executable> <compilerVersion>1.6</compilerVersion> <source>1.6</source> <target>1.6</target> </configuration> </plugin> <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>gwt-maven-plugin</artifactId> <version>2.1.0</version> <executions> <execution> <goals> <goal>compile</goal> <goal>generateAsync</goal> <goal>mergewebxml</goal> <goal>test</goal> </goals> </execution> </executions> <configuration> <servicePattern>**/client/**/*Service.java</servicePattern> <noServer>${noServer}</noServer> <noserver>${noServer}</noserver> <modules> <module>com.abc.example.Module1</module> <module>com.abc.example.Module2</module> </modules> <runTarget>com.abc.example.Module1/module1.jsp</runTarget> <port>8080</port> <extraJvmArgs>-Xmx1024m -Xms1024m -Xss1024k -Dgwt.jjs.permutationWorkerFactory=com.google.gwt.dev.ThreadedPermutationWorkerFactory</extraJvmArgs> <hostedWebapp>war</hostedWebapp> <warSourceDirectory>${basedir}/war</warSourceDirectory> <webXml>${basedir}/war/WEB-INF/web.xml</webXml> </configuration> </plugin> <plugin> <artifactId>maven-antrun-plugin</artifactId> <executions> <execution> <phase>process-classes</phase> <configuration> </configuration> <goals> <goal>run</goal> </goals> </execution> </executions> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-war-plugin</artifactId> <version>2.1-beta-1</version> <configuration> <warSourceDirectory>${basedir}/war</warSourceDirectory> <webXml>${basedir}/war/WEB-INF/web.xml</webXml>  <containerConfigXML>war/WEB-INF/classes/context/context.xml</containerConfigXML> <warSourceExcludes>.gwt-tmp/**</warSourceExcludes> </configuration> </plugin> <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>cobertura-maven-plugin</artifactId> <executions> <execution> <goals> <goal>clean</goal> </goals> </execution> </executions> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-surefire-plugin</artifactId> <version>2.4.2</version> <configuration> <argLine>-Xmx1024m</argLine> <skipTests>${skipTest}</skipTests> </configuration> </plugin> <plugin> <artifactId>maven-clean-plugin</artifactId> <version>2.2</version> <configuration> <filesets> <fileset> <directory>war/module1</directory> </fileset> <fileset> <directory>war/module2</directory> </fileset> <fileset> <directory>war/WEB-INF/lib</directory> </fileset> </filesets> </configuration> </plugin> </plugins> <resources> <resource> <directory>src/main/resources</directory> <excludes> <exclude>**/public/resources/**</exclude> <exclude>**/public/images/**</exclude> </excludes> <filtering>true</filtering> </resource> </resources> <filters> <filter>src/main/resources/build/build-${env}.properties</filter> </filters> </build> <profiles> <profile> <activation> <activeByDefault>true</activeByDefault> </activation> <id>dev</id> <properties> <env>dev</env> </properties> </profile> </profiles> <reporting> <plugins> <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>cobertura-maven-plugin</artifactId> </plugin> </plugins> </reporting>

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C++ Serialization Clean XML Similar to XSTREAM

- by disown

I need to write a linux c++ app which saves it settings in XML format (for easy hand editing) and also communicates with existing apps through XML messages over sockets and HTTP. Problem is that I haven't been able to find any intelligent libs to help me, I don't particular feel like writing DOM or SAX code just to write and read some very simple messages. Boost Serialization was almost a match, but it adds a lot of boost-specific data to the xml it generates. This obviously doesn't work well for interchange formats. I'm wondering if it is possible to make Boost Serialization or some other c++ serialization library generate clean xml. I don't mind if there are some required extra attributes - like a version attribute, but I'd really like to be able to control their naming and also get rid of 'features' that I don't use - tracking_level and class_id for instance. Ideally I would just like to have something similar to xstream in Java. I am aware of the fact that c++ lacks introspection and that it is therefore necessary to do some manual coding - but it would be nice if there was a clean solution to just read and write simple XML without kludges! If this cannot be done I am also interested in tools where the XML schema is the canonical resource (contract first) - a good JAXB alternative to C++. So far I have only found commercial solutions like CodeSynthesis XSD. I would prefer open source solutions. I have tried gSoap - but it generates really ugly code and it is also SOAP-specific. In desperation I also started looking at alternative serialization formats for protobuffers. This exists - but only for Java! It really surprises me that protocol buffers seems to be a better supported data interchange format than XML. I'm going mad just finding libs for this app and I really need some new ideas. Anyone?

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NHibernate.MappingException - Troubles Shooting Checklist (no persister for)

- by Berryl

Here's a starter list: 1) if hbm is hand generated, is it an embedded resource? 2) if using FNH, does it pass a PerssistenceSpecification test? 3) if not using FNH, can you save and then load the persisted class? 4) more? I'm sure many of you have gotten this one at one point or another. But have you ever gotten it when you knew your mapping was set up correctly? I started getting this exception after I started using a new repository design, but only in one scenario! PersistenceSpecification tests pass, as do all repository methods (using SQLite). The scenario that leads to the exception is when legacy projects from a different db are converted to green field system. The legacy system is from a different database and has it's own session factory, which should be irrelevant because the error comes after previously unconverted Projects are retrieved and in memory. As the routine tries to save these unconverted Projects into the new database, the exception is thrown, full stack trace below. Any ideas on how to build up the trouble shooting check list and solves this problem? Cheers, Berryl === the Exception trace ===== failed: NHibernate.MappingException : No persister for: Smack.ConstructionAdmin.Domain.Model.Projects.Project at NHibernate.Impl.SessionFactoryImpl.GetEntityPersister(String entityName) at NHibernate.Impl.SessionImpl.GetEntityPersister(String entityName, Object obj) at NHibernate.Engine.ForeignKeys.IsTransient(String entityName, Object entity, Nullable`1 assumed, ISessionImplementor session) at NHibernate.Event.Default.AbstractSaveEventListener.GetEntityState(Object entity, String entityName, EntityEntry entry, ISessionImplementor source) at NHibernate.Event.Default.DefaultSaveOrUpdateEventListener.PerformSaveOrUpdate(SaveOrUpdateEvent event) at NHibernate.Event.Default.DefaultSaveOrUpdateEventListener.OnSaveOrUpdate(SaveOrUpdateEvent event) at NHibernate.Impl.SessionImpl.FireSaveOrUpdate(SaveOrUpdateEvent event) at NHibernate.Impl.SessionImpl.SaveOrUpdate(Object obj) NHibernate\Repository\FabioNHibRepository.cs(46,0): at Smack.Core.Data.NHibernate.Repository.FabioNHibRepository`1.Add(T item) LegacyConversion\LegacyBatchUpdater.cs(20,0): at Smack.ConstructionAdmin.Data.LegacyConversion.LegacyBatchUpdater.ConvertOpenLegacyProjects(ILegacyProjectDao legacyProjectDao, IProjectRepository greenProjectRepository) Data\Brownfield\ProjectBatchUpdate_SQLiteTests.cs(19,0): at Smack.ConstructionAdmin.Tests.Data.Brownfield.ProjectBatchUpdate_SQLiteTests.Test()

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Create custom culture in ASP.NET

- by Billy

I want to create a resource file for Singaporean English (en-sg) named "shopping.en-sg.resx" in App_GlobalResources folder. I get error during compilation. Error 1 The namespace 'Resources' already contains a definition for 'shopping' c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\web\2cd6afe9\737b0a13\App_GlobalResources.vomuzavz.1.cs 26 After searching Google, I discover that "en-sg" is not a default culture and I have to create custom culture for it. I don't know the detailed steps of this. What should I do to create the culture and remove the compilation error? I follow the example in MSDN, create a file called "shopping.x-en-US-sample.resx" and put the following code into BasePage's function (protected override void InitializeCulture()): CultureAndRegionInfoBuilder cib = null; cib = new CultureAndRegionInfoBuilder( "x-en-US-sample", CultureAndRegionModifiers.None); CultureInfo ci = new CultureInfo("en-US"); cib.LoadDataFromCultureInfo(ci); RegionInfo ri = new RegionInfo("US"); cib.LoadDataFromRegionInfo(ri); cib.Register(); ci = new CultureInfo("x-en-US-sample"); However, compilation error is still exist. UPDATED: You can easily reproduce the problem by creating an empty website and two files "shopping.en-sg.resx" and "shopping.resx" in the app_globalresources folder.

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How to emulate "-lib foo.jar" from _within_ build.xml

- by Thorbjørn Ravn Andersen

By specifying "-lib foo.jar" to ant I get the behaviour that the classes in foo.jar is added to the ant classloader and are available for various tasks taking a class name argument. I'd like to be able to specify the same behaviour but only from inside build.xml (so we can do this on a vanilla ant). For taskdefs we have functioning code looking like: <taskdef resource="net/sf/antcontrib/antlib.xml" description="for/foreach tasks"> <classpath> <pathelement location="${active.workspace}/ant-contrib-1.X/lib/ant-contrib.jar" /> </classpath> </taskdef> where the definition is completely provided from the ant-contrib.jar listed. What is the equivalent mechanism for the "global" ant classpath? (I have thought out that this is the way to get <javac> use ecj-3.5.jar to compile with on a JRE - http://stackoverflow.com/questions/2364006/specifying-the-eclipse-compiler-completely-from-within-build-xml - in a way compatible with ant 1.7. Better suggestions are welcome :) EDIT: It appears that the about-to-be-released version 1.0 of ant4eclipse includes ecj. This does not answer the question, but may solve my basic problem.

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ASP.NET MVC on Cassini: How can I force the "content" directory to return 304s instead of 200s?

- by Portman

Scenario: I have an ASP.NET MVC application developed in Visual Studio 2008. There is a root folder named "Content" that stores images and stylesheets. When I run locally (using Cassini) and browse my application, every resource from the "Content" directory is always downloaded. Using Firebug, I can verify that the web server returns an HTTP 200 ("ok"). Desired: I would like for Cassini to return HTTP 304 ("not modified") instead of 200. This is the behavior when running the site under IIS7. Reasoning: The site I am working on has a large number of static resources (often as many as 40 per page). Browsing the site is very fast on IIS7, because these resources are (correctly) cached by the browser. However, browsing the site on my local machine is painfully slow. Pages that render in under 1 second on IIS7 take over 30 seconds to render on Cassini. It's actually faster for me to upload the entire website every few minutes and test from there. (Yes, I recognize that this is perverse and crazy.) So: how can I instruct/trick Cassini into treating the "Content" directory like IIS7 does?

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ildasm and dynamic exe files

- by TonyNeallon

Hi There, I am trying to create an application can modify properties in IL to create a slightly different executable. E.g Client A runs app and a label on the WinForm label Reads "Client A:". Client B runs the app and Label Says "Client B". Easy I know using config files or resource files but thats not an option for this project. The Main program needs to be able to generate .exe file dynamically based on some form fields entered by user. My solution was to create a standalone executable that contained all the elements which I needed to make dynamic. I then used ildasm to generate the IL and thought that I could use this IL and substitute tags for the elements i wanted to make dynamic. I could then replace those tags at runtime after user filled the form using regex etc. The problem is, the if i re save the IL file generated by ILDASM as an exe and try to run it. I just launches console and does nothing. Am I going about this the wrong way? I didnt want to delve into Reflection as the dynamic .exe is a really simple one and I thought reverse engineering IL with ildasm would be the quickest way. You thoughts and pointers are much appreciated. Tony

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Apache mod_rewrite RewriteCond to by-pass static resources not working

- by d11wtq

I can't for the life of me fathom out why this RewriteCond is causing every request to be sent to my FastCGI application when it should in fact be letting Apache serve up the static resources. I've added a hello.txt file to my DocumentRoot to demonstrate. The text file: ls /Sites/CioccolataTest.webapp/Contents/Resources/static hello.txt` The VirtualHost and it's rewrite rules: AppClass /Sites/CioccolataTest.webapp/Contents/MacOS/CioccolataTest -port 5065 FastCgiExternalServer /Sites/CioccolataTest.webapp/Contents/MacOS/CioccolataTest.fcgi -host 127.0.0.1:5065 <VirtualHost *:80> ServerName cioccolata-test.webdev DocumentRoot /Sites/CioccolataTest.webapp/Contents/Resources/static RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^/(.*)$ /Sites/CioccolataTest.webapp/Contents/MacOS/CioccolataTest.fcgi/$1 [QSA,L] </VirtualHost> Even with the -f, Apache is directing requests for this text file (i.e. access http://cioccolata-test.webdev/hello.txt returns my app, not the text file). As a proof of concept I changed the RewriteCond to: RewriteCond %{REQUEST_URI} !^/hello.txt That made it serve the text file correctly and allowed every other request to hit the FastCGI application. Why doesn't my original version work? I need to tell apache to serve every file in the DocumentRoot as a static resource, but if the file doesn't exist it should rewrite the request to my FastCGI application. NOTE: The running FastCGI application is at /Sites/CioccolataTest.webapp/Contents/MacOS/CioccolataTest (without the .fcgi prefix)... the .fcgi prefix is only being used to tell the fastcgi module to direct the request to the app.

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Get remote image using cURL then resample.

- by Chris

I want to be able to retrieve a remote image from a webserver, resample it, and then serve it up to the browser AND save it to a file. Here is what I have so far: $ch = curl_init(); // set URL and other appropriate options curl_setopt($ch, CURLOPT_URL, "$rURL"); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_HEADER, 0); // grab URL and pass it to the browser $out = curl_exec($ch); // close cURL resource, and free up system resources curl_close($ch); $imgRes = imagecreatefromstring($out); imagejpeg($imgRes, $filename, 70); header("Content-Type: image/jpg"); header("Content-length: ".filesize($filename)); header("Content-Transfer-Encoding: binary"); header("Content-Length: ".filesize($filename)); readfile("$filename"); exit(); Update Updated code to include imjpeg step to save the image as lower quality. But how do I then, efficiently, serve this up to the browser. I currently, later in the code, do this readfile("$filename"); along with some header information but that means I'm reading the file back in again which seems inefficient.

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What is the best way to handle autorotation with multiple subview?

- by thangnguyen

I am learning and programing an application. I do this project based on what I learned from the book Beginning iphone 3 development. I have two main questions here: I would like to create a multi utility application so I need multiple-view. I have a main view controller which will control switching between views. In this example I have two views A and B. I have 2 view controller A and B which will handles all of events on these 2 views. I have 2 nib files viewA.xib and viewB.xib. One of the uitility is reading PDF. So I create another class which handle the PDF file which can load a PDF page call PDFview. From Interface Builder, I selected class identity for view of the viewB.xib as PDFView class. The result is I can switching between View A and view B. View B will display the content of the PDF page. I am not sure if my solution is right or wrong but now I don't know how to handle the autorotation. The rotation will active the view controller B. But the PDFView handle how to display the PDF on the View. Could you please tell me how I should handle this in a right way? Second question: Should I create the subview automatically? In case I need to do the swipe page animation, how can I do that? I think that I need to load another subview so I can do the animation when swap view. But I think this solution will waste the resource. I can just load another page of the PDF, but in this case I don't know how to use animation? Please tell me how I should solve this? I highly appreciate your time reading and answering my question. Thang Nguyen

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Mathematics for Computer Science Students

- by Ender

To cut a long story short, I am a CS student that has received no formal Post-16 Maths education for years. Right now even my Algebra is extremely rusty and I have a couple of months to shape up my skills. I've got a couple of video lectures in my bookmarks, consisting of: Pre-Calculus Algebra Calculus Probability Introduction to Statistics Differential Equations Linear Algebra My aim as of today is to be able to read the CLRS book Introduction to Algorithms and be able to follow the Mathematical notation in that, as well as being able to confidently read and back-up any arguments written in Mathematical notation. Aside from these video lectures, can anyone recommend any good books to help teach someone wishing to go from a low-foundation level to a more advanced level of Mathematics? Just as a note, I've taken a first-year module in Analytical Modelling, so I understand some of the basic concepts of Discrete Mathematics. EDIT: Just a note to those that are looking to learn Linear Algebra using the Video Lectures I have posted up. Peteris Krumins' Blog contains a run-through of these lecture notes as well as his own commentary and lecture notes, an invaluable resource for those looking to follow the lectures too.

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