You are viewing a plain text version of this content. The canonical link for it is here.

Posted to users@wicket.apache.org by Jörn Zaefferer <jo...@googlemail.com> on 2008/11/04 17:19:39 UTC

Render a Wicket page to a string for HTML email

Hi,

I've found this article on how to render a page to a String:
http://www.danwalmsley.com/2008/10/21/render-a-wicket-page-to-a-string-for-html-email/

It seemed to be exactly what I was looking for. Copying the code into
my app, I got a compiler error on the line where the WebRequest is
created. Using the constructor to ServletWebRequest helped.

Nonetheless, I get only an empty string back, no clue whats going wrong.

I'm using Wicket 1.3.5.

Any ideas?

Jörn

Re: Render a Wicket page to a string for HTML email

Posted by Igor Vaynberg <ig...@gmail.com>.

saving up vacation days for the caribbean baby :)

-igor

On Tue, Nov 4, 2008 at 9:55 AM, Martijn Dashorst
<ma...@gmail.com> wrote:
> Are you  in New Orleans in some voodoo bar? Why not join us at ApacheCon? :)
>
> Martijn
>
> On Tue, Nov 4, 2008 at 10:43 AM, Igor Vaynberg <ig...@gmail.com> wrote:
>> without seeing your code we have to resort to waving a dead chicken in
>> front of our screens or making swags.
>>
>> -igor
>>
>> On Tue, Nov 4, 2008 at 9:19 AM, Jörn Zaefferer
>> <jo...@googlemail.com> wrote:
>>> Hi,
>>>
>>> I've found this article on how to render a page to a String:
>>> http://www.danwalmsley.com/2008/10/21/render-a-wicket-page-to-a-string-for-html-email/
>>>
>>> It seemed to be exactly what I was looking for. Copying the code into
>>> my app, I got a compiler error on the line where the WebRequest is
>>> created. Using the constructor to ServletWebRequest helped.
>>>
>>> Nonetheless, I get only an empty string back, no clue whats going wrong.
>>>
>>> I'm using Wicket 1.3.5.
>>>
>>> Any ideas?
>>>
>>> Jörn
>>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
>
>
>
> --
> Become a Wicket expert, learn from the best: http://wicketinaction.com
> Apache Wicket 1.3.4 is released
> Get it now: http://www.apache.org/dyn/closer.cgi/wicket/1.3.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>

---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
For additional commands, e-mail: users-help@wicket.apache.org

Re: Render a Wicket page to a string for HTML email

Posted by James Carman <ja...@carmanconsulting.com>.

Is the setAjax(true) absolutely necessary in all cases?

On Wed, Nov 5, 2008 at 5:22 AM, Jörn Zaefferer
<jo...@googlemail.com> wrote:
> No voodoo neccessary, got it working:
>
> protected String renderPage(Class<? extends Page> pageClass,
> PageParameters pageParameters) {
>
>                //get the servlet context
>                WebApplication application = (WebApplication) WebApplication.get();
>
>                ServletContext context = application.getServletContext();
>
>                //fake a request/response cycle
>                MockHttpSession servletSession = new MockHttpSession(context);
>                servletSession.setTemporary(true);
>
>                MockHttpServletRequest servletRequest = new MockHttpServletRequest(
>                                application, servletSession, context);
>                MockHttpServletResponse servletResponse = new MockHttpServletResponse(
>                                servletRequest);
>
>                //initialize request and response
>                servletRequest.initialize();
>                servletResponse.initialize();
>
>                WebRequest webRequest = new ServletWebRequest(servletRequest);
>
>                BufferedWebResponse webResponse = new BufferedWebResponse(servletResponse);
>                webResponse.setAjax(true);
>
>                WebRequestCycle requestCycle = new WebRequestCycle(
>                                application, webRequest, webResponse);
>
>                requestCycle.setRequestTarget(new
> BookmarkablePageRequestTarget(pageClass, pageParameters));
>
>                try {
>                        requestCycle.getProcessor().respond(requestCycle);
>
>                        log.warn("Response after request: "+webResponse.toString());
>
>                        if (requestCycle.wasHandled() == false) {
>                                requestCycle.setRequestTarget(new WebErrorCodeResponseTarget(
>                                                HttpServletResponse.SC_NOT_FOUND));
>                        }
>                        requestCycle.detach();
>
>                } finally {
>                        requestCycle.getResponse().close();
>                }
>
>                return webResponse.toString();
>        }
>
> Does it make sense to put this in a ticket to request it for Wicket 1.5?
>
> Jörn
>
> On Tue, Nov 4, 2008 at 5:55 PM, Martijn Dashorst
> <ma...@gmail.com> wrote:
>> Are you  in New Orleans in some voodoo bar? Why not join us at ApacheCon? :)
>>
>> Martijn
>>
>> On Tue, Nov 4, 2008 at 10:43 AM, Igor Vaynberg <ig...@gmail.com> wrote:
>>> without seeing your code we have to resort to waving a dead chicken in
>>> front of our screens or making swags.
>>>
>>> -igor
>>>
>>> On Tue, Nov 4, 2008 at 9:19 AM, Jörn Zaefferer
>>> <jo...@googlemail.com> wrote:
>>>> Hi,
>>>>
>>>> I've found this article on how to render a page to a String:
>>>> http://www.danwalmsley.com/2008/10/21/render-a-wicket-page-to-a-string-for-html-email/
>>>>
>>>> It seemed to be exactly what I was looking for. Copying the code into
>>>> my app, I got a compiler error on the line where the WebRequest is
>>>> created. Using the constructor to ServletWebRequest helped.
>>>>
>>>> Nonetheless, I get only an empty string back, no clue whats going wrong.
>>>>
>>>> I'm using Wicket 1.3.5.
>>>>
>>>> Any ideas?
>>>>
>>>> Jörn
>>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>>> For additional commands, e-mail: users-help@wicket.apache.org
>>>
>>>
>>
>>
>>
>> --
>> Become a Wicket expert, learn from the best: http://wicketinaction.com
>> Apache Wicket 1.3.4 is released
>> Get it now: http://www.apache.org/dyn/closer.cgi/wicket/1.3.
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
>

---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
For additional commands, e-mail: users-help@wicket.apache.org

Re: Render a Wicket page to a string for HTML email

Posted by rolandpeng <ro...@cht.com.tw>.

append some more information.
After tracing the sessionId in live sessions. I found several id listed
below:

sessionId1=3F329131CF155AEAA4FB383AD854E510 (normal format,created by login)
sessionId2=7cc3d77e_12766bcf8eb__7fff (strange,created by call render api)
sessionId3=7cc3d77e_12766bcf8eb__7ffd (strange,created by call reder api)

I use wicket 1.4.6 for developing.


rolandpeng wrote:
> 
> Thank you. I have tested your implementation class,but it still the
> same(live sessions increasing) while I call
> requestLogger.getLiveSessions(). Does anyone have other advice? Thank you
> so much in advance.
> 

-- 
View this message in context: http://old.nabble.com/Render-a-Wicket-page-to-a-string-for-HTML-email-tp20325702p27916505.html
Sent from the Wicket - User mailing list archive at Nabble.com.


---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
For additional commands, e-mail: users-help@wicket.apache.org

Re: Render a Wicket page to a string for HTML email

Posted by rolandpeng <ro...@cht.com.tw>.

Thank you. I have tested your implementation class,but it still the same(live
sessions increasing) while I call requestLogger.getLiveSessions(). Does
anyone have other advice? Thank you so much in advance.


Xavier López-2 wrote:
> 
> Oops, forgot to mention that code has a pair of bugs in it. Here is the
> implementation i came up with :
> 
> public class RenderHTMLUtils {
> 
>     public static String renderPage(Page page) {
> 
>         //get the servlet context
>         WebApplication application = (WebApplication)
> WebApplication.get();
> 
>         ServletContext context = application.getServletContext();
> 
>         //fake a request/response cycle
>         MockHttpSession servletSession = new MockHttpSession(context);
>         servletSession.setTemporary(true);
> 
>         MockHttpServletRequest servletRequest = new
> MockHttpServletRequest(
>                 application, servletSession, context);
>         MockHttpServletResponse servletResponse = new
> MockHttpServletResponse(
>                 servletRequest);
> 
>         //initialize request and response
>         servletRequest.initialize();
>         servletResponse.initialize();
> 
>         WebRequest webRequest = new ServletWebRequest(servletRequest);
> 
>         BufferedWebResponse webResponse = new
> BufferedWebResponse(servletResponse);
>         webResponse.setAjax(true);
> 
>         WebRequestCycle requestCycle = new WebRequestCycle(
>                 application, webRequest, webResponse);
> 
>         //requestCycle.setRequestTarget(new
> BookmarkablePageRequestTarget(pageClass, pageParameters));
>         requestCycle.setRequestTarget(new PageRequestTarget(page));
> 
>         try {
>             requestCycle.getProcessor().respond(requestCycle);
> 
>             if (requestCycle.wasHandled() == false) {
>                 requestCycle.setRequestTarget(new
> WebErrorCodeResponseTarget(
>                         HttpServletResponse.SC_NOT_FOUND));
>             }
>             requestCycle.detach();
> 
>         } finally {
>             requestCycle.getResponse().close();
>         }
> 
>         return webResponse.toString();
>     }
> 
> }
> 
> Cheers,
> Xavier
> 

-- 
View this message in context: http://old.nabble.com/Render-a-Wicket-page-to-a-string-for-HTML-email-tp20325702p27916314.html
Sent from the Wicket - User mailing list archive at Nabble.com.


---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
For additional commands, e-mail: users-help@wicket.apache.org

Re: Render a Wicket page to a string for HTML email

Posted by Xavier López <xa...@gmail.com>.

Oops, forgot to mention that code has a pair of bugs in it. Here is the
implementation i came up with :

public class RenderHTMLUtils {

    public static String renderPage(Page page) {

        //get the servlet context
        WebApplication application = (WebApplication) WebApplication.get();

        ServletContext context = application.getServletContext();

        //fake a request/response cycle
        MockHttpSession servletSession = new MockHttpSession(context);
        servletSession.setTemporary(true);

        MockHttpServletRequest servletRequest = new MockHttpServletRequest(
                application, servletSession, context);
        MockHttpServletResponse servletResponse = new
MockHttpServletResponse(
                servletRequest);

        //initialize request and response
        servletRequest.initialize();
        servletResponse.initialize();

        WebRequest webRequest = new ServletWebRequest(servletRequest);

        BufferedWebResponse webResponse = new
BufferedWebResponse(servletResponse);
        webResponse.setAjax(true);

        WebRequestCycle requestCycle = new WebRequestCycle(
                application, webRequest, webResponse);

        //requestCycle.setRequestTarget(new
BookmarkablePageRequestTarget(pageClass, pageParameters));
        requestCycle.setRequestTarget(new PageRequestTarget(page));

        try {
            requestCycle.getProcessor().respond(requestCycle);

            if (requestCycle.wasHandled() == false) {
                requestCycle.setRequestTarget(new
WebErrorCodeResponseTarget(
                        HttpServletResponse.SC_NOT_FOUND));
            }
            requestCycle.detach();

        } finally {
            requestCycle.getResponse().close();
        }

        return webResponse.toString();
    }

}

Cheers,
Xavier

2010/3/16 Xavier López <xa...@gmail.com>

> Here is another way I used when I was in need of this feature. This one
> simulates a request cycle. I don't know if you could adapt this to fit your
> needs (maybe doing the same, but with the real requestCycle instead) ?
>
>
> http://www.danwalmsley.com/2008/10/21/render-a-wicket-page-to-a-string-for-html-email/
>
> Cheers,
> Xavier
>
> 2010/3/16 rolandpeng <ro...@cht.com.tw>
>
>
>> That works , thank you!
>> But I have another question:
>> when I use requestLogger.getLiveSessions() to get the live sessions,the
>> number of sessions always increased after I call the render api.
>> Is it possible to render page of html source in the same session(not
>> create
>> a new one)?
>> Thank you!
>>
>>
>> Scott Swank wrote:
>> >
>> > Here is a largely equivalent class that I created.  It simply extends
>> > BaseWicketTester.
>> >
>> > public class PageRenderer extends BaseWicketTester {
>> >       private final Locale locale;
>> >
>> >       public PageRenderer(Locale locale) {
>> >               this.locale = locale;
>> >       }
>> >
>> >       public PageRenderer() {
>> >               this.locale = null;
>> >       }
>> >
>> >       private String renderStartPage() {
>> >               if (this.locale != null) {
>> >                       getWicketSession().setLocale(locale);
>> >               }
>> >
>> >               return getServletResponse().getDocument();
>> >       }
>> >
>> >       public synchronized String render(Class<? extends WebPage>
>> pageClass) {
>> >               startPage(pageClass);
>> >               return renderStartPage();
>> >       }
>> >
>> >       public synchronized String render(Class<? extends WebPage>
>> pageClass,
>> > PageParameters parameters) {
>> >               startPage(pageClass, parameters);
>> >               return renderStartPage();
>> >       }
>> >
>> >       public synchronized String render(WebPage page) {
>> >               startPage(page);
>> >               return renderStartPage();
>> >       }
>> >
>> > }
>> >
>> > ---------------------------------------------------------------------
>> > To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> > For additional commands, e-mail: users-help@wicket.apache.org
>> >
>> >
>> >
>>
>> --
>> View this message in context:
>> http://old.nabble.com/Render-a-Wicket-page-to-a-string-for-HTML-email-tp20325702p27914411.html
>> Sent from the Wicket - User mailing list archive at Nabble.com.
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
>
>
> --
> "Klein bottle for rent--inquire within."
>

Re: Render a Wicket page to a string for HTML email

Posted by Xavier López <xa...@gmail.com>.

Here is another way I used when I was in need of this feature. This one
simulates a request cycle. I don't know if you could adapt this to fit your
needs (maybe doing the same, but with the real requestCycle instead) ?

http://www.danwalmsley.com/2008/10/21/render-a-wicket-page-to-a-string-for-html-email/

Cheers,
Xavier

2010/3/16 rolandpeng <ro...@cht.com.tw>

>
> That works , thank you!
> But I have another question:
> when I use requestLogger.getLiveSessions() to get the live sessions,the
> number of sessions always increased after I call the render api.
> Is it possible to render page of html source in the same session(not create
> a new one)?
> Thank you!
>
>
> Scott Swank wrote:
> >
> > Here is a largely equivalent class that I created.  It simply extends
> > BaseWicketTester.
> >
> > public class PageRenderer extends BaseWicketTester {
> >       private final Locale locale;
> >
> >       public PageRenderer(Locale locale) {
> >               this.locale = locale;
> >       }
> >
> >       public PageRenderer() {
> >               this.locale = null;
> >       }
> >
> >       private String renderStartPage() {
> >               if (this.locale != null) {
> >                       getWicketSession().setLocale(locale);
> >               }
> >
> >               return getServletResponse().getDocument();
> >       }
> >
> >       public synchronized String render(Class<? extends WebPage>
> pageClass) {
> >               startPage(pageClass);
> >               return renderStartPage();
> >       }
> >
> >       public synchronized String render(Class<? extends WebPage>
> pageClass,
> > PageParameters parameters) {
> >               startPage(pageClass, parameters);
> >               return renderStartPage();
> >       }
> >
> >       public synchronized String render(WebPage page) {
> >               startPage(page);
> >               return renderStartPage();
> >       }
> >
> > }
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> > For additional commands, e-mail: users-help@wicket.apache.org
> >
> >
> >
>
> --
> View this message in context:
> http://old.nabble.com/Render-a-Wicket-page-to-a-string-for-HTML-email-tp20325702p27914411.html
> Sent from the Wicket - User mailing list archive at Nabble.com.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>


-- 
"Klein bottle for rent--inquire within."

Re: Render a Wicket page to a string for HTML email

Posted by rolandpeng <ro...@cht.com.tw>.

That works , thank you!
But I have another question:
when I use requestLogger.getLiveSessions() to get the live sessions,the
number of sessions always increased after I call the render api.
Is it possible to render page of html source in the same session(not create
a new one)?
Thank you!


Scott Swank wrote:
> 
> Here is a largely equivalent class that I created.  It simply extends
> BaseWicketTester.
> 
> public class PageRenderer extends BaseWicketTester {
> 	private final Locale locale;
> 
> 	public PageRenderer(Locale locale) {
> 		this.locale = locale;
> 	}
> 
> 	public PageRenderer() {
> 		this.locale = null;
> 	}
> 
> 	private String renderStartPage() {
> 		if (this.locale != null) {
> 			getWicketSession().setLocale(locale);
> 		}
> 
> 		return getServletResponse().getDocument();
> 	}
> 
> 	public synchronized String render(Class<? extends WebPage> pageClass) {
> 		startPage(pageClass);
> 		return renderStartPage();
> 	}
> 
> 	public synchronized String render(Class<? extends WebPage> pageClass,
> PageParameters parameters) {
> 		startPage(pageClass, parameters);
> 		return renderStartPage();
> 	}
> 
> 	public synchronized String render(WebPage page) {
> 		startPage(page);
> 		return renderStartPage();
> 	}
> 
> }
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
> 
> 
> 

-- 
View this message in context: http://old.nabble.com/Render-a-Wicket-page-to-a-string-for-HTML-email-tp20325702p27914411.html
Sent from the Wicket - User mailing list archive at Nabble.com.


---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
For additional commands, e-mail: users-help@wicket.apache.org

Re: Render a Wicket page to a string for HTML email

Posted by Scott Swank <sc...@gmail.com>.

Ours is running in a separate, non-Wicket process that just generates
and sends e-mail, so there's nothing to step on.  But otherwise yes,
you would want to protect your ThreadLocal.

On Thu, Nov 6, 2008 at 4:52 PM, cjlyth <cj...@gmail.com> wrote:
>
> Yeah this is about the same, I think you would still have to do it in its own
> thread.
>
>                try {
>                        return Executors.newSingleThreadExecutor().submit(
>                                        new Callable<String>() {
>                                                public String call() throws Exception {
>                                                        return new PageRenderer().render(pageClass, pageParameters);
>                                                }
>                                        }).get();
>                } catch (InterruptedException e) {
>                        throw new WicketRuntimeException(e.getMessage(), e);
>                } catch (ExecutionException e) {
>                        throw new WicketRuntimeException(e.getMessage(), e);
>                }
>
> I think its also worth mentioning that Anatoly Kupriyanov has a template
> implementation that might solve this problem. However, I like the simpler
> approach in this thread.
> http://cwiki.apache.org/confluence/display/WICKET/Use+wicket+as+template+engine
>
>
>
> Scott Swank wrote:
>>
>> Here is a largely equivalent class that I created.  It simply extends
>> BaseWicketTester.
>> ...
>>
>
> --
> View this message in context: http://www.nabble.com/Render-a-Wicket-page-to-a-string-for-HTML-email-tp20325702p20372800.html
> Sent from the Wicket - User mailing list archive at Nabble.com.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>

---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
For additional commands, e-mail: users-help@wicket.apache.org

Re: Render a Wicket page to a string for HTML email

Posted by cjlyth <cj...@gmail.com>.

Yeah this is about the same, I think you would still have to do it in its own
thread. 

		try {
			return Executors.newSingleThreadExecutor().submit(
					new Callable<String>() {
						public String call() throws Exception {
							return new PageRenderer().render(pageClass, pageParameters);
						}
					}).get();
		} catch (InterruptedException e) {
			throw new WicketRuntimeException(e.getMessage(), e);
		} catch (ExecutionException e) {
			throw new WicketRuntimeException(e.getMessage(), e);
		}

I think its also worth mentioning that Anatoly Kupriyanov has a template
implementation that might solve this problem. However, I like the simpler
approach in this thread.
http://cwiki.apache.org/confluence/display/WICKET/Use+wicket+as+template+engine



Scott Swank wrote:
> 
> Here is a largely equivalent class that I created.  It simply extends
> BaseWicketTester.
> ... 
> 

-- 
View this message in context: http://www.nabble.com/Render-a-Wicket-page-to-a-string-for-HTML-email-tp20325702p20372800.html
Sent from the Wicket - User mailing list archive at Nabble.com.


---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
For additional commands, e-mail: users-help@wicket.apache.org