Need help with SpringMVC and PDF [Solved]

[GertThiel]

Hi,

I read the related chapter in the reference about subclassing a AbstractPdfView. But I can´t get it working all.

I want to combine Tapestry with Spring, but still use Spring MVC to create PDF files on the fly.

My web.xml (DTDs ommited intentionally):

<web-app>

	<display-name>FlexLayout</display-name>

    <filter>
        <filter-name>redirect</filter-name>
        <filter-class>org.apache.tapestry.RedirectFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>redirect</filter-name>
        <url-pattern>/</url-pattern>
    </filter-mapping>

	<servlet>
		<servlet-name>flexlayout</servlet-name>
		<servlet-class>org.apache.tapestry.ApplicationServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet>
		<servlet-name>flpdfpreview</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>

	<servlet-mapping>
		<servlet-name>flexlayout</servlet-name>
		<url-pattern>/app</url-pattern>
	</servlet-mapping>
	<servlet-mapping>
		<servlet-name>flpdfpreview</servlet-name>
		<url-pattern>/pdf</url-pattern>
	</servlet-mapping>

	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
	</welcome-file-list>

</web-app>

FlexLayoutEngine.java (for Tapestry):

package gtds.web;

import java.util.Map;

import org.apache.tapestry.engine.BaseEngine;
import org.apache.tapestry.request.RequestContext;
import org.springframework.context.ApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

public class FlexLayoutEngine extends BaseEngine {

	public static final String APPLICATION_CONTEXT_KEY = "appContext";

	/**
	* @see org.apache.tapestry.engine.AbstractEngine#setupForRequest(org.apache.tapestry.request.RequestContext)
	*/
	protected void setupForRequest(RequestContext context) {
		super.setupForRequest(context);
		// insert ApplicationContext in global, if not there
		Map global = (Map) getGlobal();
		ApplicationContext ac = (ApplicationContext) global.get(APPLICATION_CONTEXT_KEY);
		if (ac == null) {
			ac = WebApplicationContextUtils.getWebApplicationContext(
					context.getServlet().getServletContext()
			);
			global.put(APPLICATION_CONTEXT_KEY, ac);
		}
	}

}

flpdfpreview-servlet.xml (Spring MVC):

<beans>

    <bean id="flSpringMVController" class="gtds.web.SpringMVController"/>

    <!-- <bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
            <props>
                <prop key="/pdf/*.pdf">flSpringMVController</prop>
            </props>
        </property>
    </bean> -->

	<bean id="viewResolver" class="org.springframework.web.servlet.view.ResourceBundleViewResolver">
    	<property name="basename"><value>views</value></property>
	</bean>

</beans>

views.properties (Spring MVC):

pdf.class=gtds.web.PreviewPdfView
pdf.url=/pdf/preview.pdf

SpringMVController.java (Spring MVC):

package gtds.web;

import org.springframework.web.servlet.mvc.Controller;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import java.io.IOException;

public class SpringMVController implements Controller {

    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        return new ModelAndView("pdf");

    }
}

PreviewPdfView.java (Spring MVC):

package gtds.web;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.view.document.AbstractPdfView;

import com.lowagie.text.Document;
import com.lowagie.text.PageSize;
import com.lowagie.text.pdf.PdfWriter;

public class PreviewPdfView extends AbstractPdfView {

	/* (non-Javadoc)
	 * @see org.springframework.web.servlet.view.document.AbstractPdfView#buildPdfDocument(java.util.Map, com.lowagie.text.Document, com.lowagie.text.pdf.PdfWriter, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
	 */
	protected void buildPdfDocument(
			Map model,
			Document doc,
			PdfWriter writer,
			HttpServletRequest request,
			HttpServletResponse response)
			throws Exception {

		doc.setPageSize(PageSize.A4);
		doc.addAuthor("FlexLayout Professionelle Layouts Service");
		doc.addTitle("FlexLayout Professionelle Layouts Service");
		doc.addSubject("FlexLayout Professionelle Layouts Service");
		doc.open();
		doc.close();
		
	}

}

Can someone help?

Regards.

P.S. This is a follow-up of Spring MVC with Tapestry.

[Alef Arendsen]

You shouldn't need to open and close the document, but that shouldn't make a difference.

Maybe you can indicate what the actual problem is. At first glance (without studying the code thoroughly) I can't really see what could be wrong.

thanx,

Alef

[GertThiel]

This actual problem is that:

I want to load a PDF page into a frame. The most of my site is done using Tapestry but the PDF pages are accessors of SpringMVC´s AbstractPdfView.

I can´t identify the correct URL I need to load the PDF view into a frame.

If I say in CustomizeLayout.html (a Tapestry page)

<html jwcid="@Shell" title="Customize Layout - FlexLayout" stylesheet="ognl&#58;assets.stylesheet">
<frameset rows="64,*">
    <frame jwcid="CustomizeLayoutEditFrame" name="edit" scrolling="no" />
    <!-- <frame jwcid="CustomizeLayoutPreviewFrame" name="view" /> -->
    <frame src="pdf/preview.pdf"            name="view" />
	<noframes>You need a browser with frames support.</noframes>
</frameset>
</html>

Tomcat issues an error message:

HTTP Status 404 - /flpdfpreview/pdf/preview.pdf
         type  Status report
   message   /flexlayout/pdf/preview.pdf
description  The requested resource (/flpdfpreview/pdf/preview.pdf) is not available.

Regards.

[Alef Arendsen]

HTTP Status 404 - /flpdfpreview/pdf/preview.pdf

Where does the flpdfpreview come from. From the servlet-mapping.

You're mapping the pdf servlet to /pdf and the other one to flpdfpreview.

Try using /flexlayout/pdf/preview.pdf (I assume the flexlayout is the context in which the war runs?)

Alef

[GertThiel]

Alef,

Try using /flexlayout/pdf/preview.pdf (I assume the flexlayout is the context in which the war runs?)

Currently I have this web.xml (http://localhost:8080/ and http://localhost:8080/app shall be handled by Tapstry, http://localhost:8080/pdf shall be handled by SpringMVC and my AbstractPdfView impl.):

<web-app>

	<display-name>FlexLayout</display-name>

    <filter>
        <filter-name>redirect</filter-name>
        <filter-class>org.apache.tapestry.RedirectFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>redirect</filter-name>
        <url-pattern>/</url-pattern>
    </filter-mapping>

	<servlet>
		<servlet-name>flexlayout</servlet-name>
		<servlet-class>org.apache.tapestry.ApplicationServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet>
		<servlet-name>flpdfpreview</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>

	<servlet-mapping>
		<servlet-name>flexlayout</servlet-name>
		<url-pattern>/app</url-pattern>
	</servlet-mapping>
	<servlet-mapping>
		<servlet-name>flpdfpreview</servlet-name>
		<url-pattern>/pdf</url-pattern>
	</servlet-mapping>

	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
	</welcome-file-list>

</web-app>

The servlet flpdfpreview ist further configured in flpdfpreview-servlet.xml (As you see, I don´t know how to configure urlMapping):

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http&#58;//www.springframework.org/dtd/spring-beans.dtd">

<beans>

	<bean id="flSpringMVController" class="gtds.web.SpringMVController"/>

	<!-- <bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
		<property name="mappings">
			<props>
				<prop key="/pdf/*.pdf">flSpringMVController</prop>
			</props>
		</property>
	</bean> -->

	<bean id="viewResolver" class="org.springframework.web.servlet.view.ResourceBundleViewResolver">
    	<property name="basename"><value>views</value></property>
	</bean>

</beans>

Of course I have a views.properties:

pdf.class=gtds.pdf.PreviewPdfView
pdf.url=/pdf/preview.pdf

CustomizeLayout.java looks like this (with that the browser tires to load http://localhost:8080/flexlayout/pdf/preview.pdf into the lower frame):

<html jwcid="@Shell" title="Customize Layout - FlexLayout" stylesheet="ognl&#58;assets.stylesheet">
<frameset rows="64,*">
    <frame jwcid="CustomizeLayoutEditFrame" name="edit" scrolling="no" />
    <frame src="pdf/preview.pdf"            name="view" />
	<noframes>You need a browser with frames support.</noframes>
</frameset>
</html>

I get this response in the PDF frame:

HTTP Status 404 - /flexlayout/pdf/preview.pdf 
* * * * *type* Status report 
* *message */flexlayout/pdf/preview.pdf 
description* The requested resource (/flexlayout/pdf/preview.pdf) is not available.

Do do see my mistake?

Regards.

[Alef Arendsen]

If you comment out the urlMapping, nothing will work. Remember: 1) request comes in, 2) gets mapped to a controller (flSpringMVCController) by a URLHandlerMapping which 3) returns a ModelAndView (in this case: pdf) which 4) gets rendered. You can't directly point your browser to views or something.

Remove the comments from the urlMapping and see if /pdf/prefview.pdf works (try it in a separate browser window, without the frame). It should.

Alef

[GertThiel]

Alef,

Remove the comments from the urlMapping and see if /pdf/prefview.pdf works (try it in a separate browser window, without the frame). It should.

I did so but nothing changed.

Regards.

[GertThiel]

SOLVED.

After tweaking URl mapping, views.properties and web.xml I finally solved that problem.

Thank you for your help.

Regards.