Need help with SpringMVC and PDF [Solved]

[GertThiel]

Hi,

I read the related chapter in the reference (http://www.springframework.org/docs/reference/view.html#view-document-configsubclasspdf) 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.WebApplica tionContextUtils;

public class FlexLayoutEngine extends BaseEngine {

public static final String APPLICATION_CONTEXT_KEY = "appContext";

/**
* @see org.apache.tapestry.engine.AbstractEngine#setupFor Request(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.getWebApplicationContex t(
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.SimpleUrlH andlerMapping">
<property name="mappings">
<props>
<prop key="/pdf/*.pdf">flSpringMVController</prop>
</props>
</property>
</bean> -->

<bean id="viewResolver" class="org.springframework.web.servlet.view.ResourceBundl eViewResolver">
<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.Abst ractPdfView;

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.Abst ractPdfView#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 (http://forum.springframework.org/showthread.php?t=9652).

[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 &#40;/flpdfpreview/pdf/preview.pdf&#41; 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.SimpleUrlH andlerMapping">
<property name="mappings">
<props>
<prop key="/pdf/*.pdf">flSpringMVController</prop>
</props>
</property>
</bean> -->

<bean id="viewResolver" class="org.springframework.web.servlet.view.ResourceBundl eViewResolver">
<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 &#40;/flexlayout/pdf/preview.pdf&#41; 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.