HTTP Request

[Jan Blok]

The servlet is loaded from the plugin, no install or something is need, just drop your plugin jar in the plugins dir. and you are done.

About the compile error; you don't need to pass the 'app' object to the servlet, that was just an example

[pbakker]

Well, I got it to compile, but now, when going to the servoy_service url, I get a tomcat Internal Server error...

It's probably something stupid I'm doing wrong, but hey, that's what you get when building an Application like servoy that is so simple to use that people like me start to use it and then offering the ability to make it more powerfull through plugins

Basically, now I've got a HelloServlet, containing the folloing code:
package test;

import javax.servlet.ServletException;
import javax.servlet.http.*;
import java.io.*;

public class HelloServlet extends HttpServlet
{
public void doGet (HttpServletRequest req,HttpServletResponse res)
throws ServletException, IOException
{
PrintWriter out = res.getWriter();
out.println("Hello, world!");
out.close();
}
}


And a serverside class with the following in it:
public class EmptyServerSideServer implements IServerPlugin {

public void initialize(IServerAccess app) throws PluginException
{
app.registerWebService("test",new HelloServlet());
}

public EmptyServerSideServer ()//must have default constructor
{
}

+ all the usual functions you have in a Server side plugin.

The whole thing compiles, but the webpages omly gives an error....

Paul

[Jan Blok]

did you make the jar? place it in the plugins dir?
you have the url wrong, it is(in your case): http://localhost:8080/servoy-service/test/page?x=1 (no underscore but dash!)

[pbakker]

Yes, created the Jar and placed it into the plugion directory.

I do think I use the correct URL, I didn't use the literal servoy_service as I wrote (that was just an example )

I use URL: http://localhost:8080/servoy-service

If I remove the Jar from the plugin directory, and I restart Servoy and then go to this page, I see a webpage that says no webservices are registered. If I place the jar in the plugin directory, I get on the same page a Tomcat internal Server error.

Attached the Jar as I created it.

Paul

[pbakker]

Mmm, I seem to be unable to upload the Jar....

I can send it by mail if you want...

Paul

[pbakker]

OK, I see what you mean... The entire URL that you gave me does show the result of the Hello world plugin

But the http://localhost:8080/servoy-service URL gives the Tomcat internal server error. I think here it should display a lits of registered webservices, doesn't it?

Should I add another function for that or something?

Paul

[pbakker]

No comments of why the servoy-service URL gives a TomCat error?

Paul

[Jan Blok]

http://localhost:8080/servoy-service/ gives no error on my server, what error does it produce?

[ROCLASI]

Okay, I tried the URL on 2.0.4 with no special plugins.
This is what I get:

Apache Tomcat/4.0.1 - HTTP Status 405 - HTTP method GET is not supported by this URL

type Status report

message HTTP method GET is not supported by this URL

description The specified HTTP method is not allowed for the requested resource (HTTP method GET is not supported by this URL).

Mac OS X 10.3.5
Servoy R2 2.0.4-build 277
Java 1.4.2-38

[pbakker]

Ok, I have the plugin in my plugin directory, as described before. In I go to URL http://localhost/servoy-service, I get the follwoing:

Apache Tomcat/4.0.1 - HTTP Status 500 - Internal Server Error

--------------------------------------------------------------------------------

type Exception report

message Internal Server Error

description The server encountered an internal error (Internal Server Error) that prevented it from fulfilling this request.

exception

java.lang.NullPointerException
at com.servoy.j2db.server.servlets.WebServicesServlet.service(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.access$0(ApplicationFilterChain.java:197)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:176)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:172)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:201)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2344)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:462)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:163)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1011)
at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1106)
at java.lang.Thread.run(Unknown Source)



--------------------------------------------------------------------------------

Now, If I go to URL: http://localhost/servoy-service/test/ then I get the result from my plugin (hello world!).


As said before: My servlet class looks like this:
package test;

import javax.servlet.ServletException;
import javax.servlet.http.*;
import java.io.*;

public class HelloServlet extends HttpServlet
{
public void service(HttpServletRequest req,HttpServletResponse res)
throws ServletException, IOException
{
PrintWriter out = res.getWriter();
out.println("Hello, world!");
out.close();
}
}

And ofcourse I have the serverside class:

public class EmptyServerSideServer implements IServerPlugin {

public void initialize(IServerAccess app) throws PluginException
{
app.registerWebService("test",new HelloServlet() );
}

public EmptyServerSideServer ()//must have default constructor
{
}

If you want I can send you the JAR (I do not seem able to add attachements to my posts)

Paul

[Jan Blok]

Ok, I have the plugin in my plugin directory, as described before. In I go to URL http://localhost/servoy-service, I get the follwoing:Apache Tomcat/4.0.1 - HTTP Status 500 - Internal Server Error

what page/result whould you expect here then?

Now, If I go to URL: http://localhost/servoy-service/test/ then I get the result from my plugin (hello world!).

yes now you are accessing your servlet...

[pbakker]

Well, if I go to URL http://localhost/servoy-service if my plugin is not in the plugin directory, I get a message that there are no Servoy webservices registered.

so, thinking logically, if I would register a webservice, I would expect the http://localhost/servoy-service URL to tell me the name of the registered service

I certainly do not expect to get an internal tomcat Server error.

If it's not possible to list the registered services, I would think an empty page would look a lot better than an page with an error.

As I said before: I can email the plugin so you can see it for yourself.

Paul