How to get HTML source code from a wicket page

[Srinu Sunkara]

Hi - I am trying to get the HTML source code of a web page with in the program (so that I can send this in an email). Can some one tell me how can I get the HTML source.

Thank you,
-Srini

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[Jean-Baptiste Quenot-3]

* Srinu Sunkara:

> Hi - I am trying to get the  HTML source code of a web page with
> in the program  (so that I can send this  in an email). Can some
> one tell me how can I get the HTML source.

Sure.  Processing a Wicket page and sending the result to a buffer
can be achieved through  StringRequestTarget, thus allowing you to
use the buffer contents for sending email.

See RequestCycle.setRequestTarget()

You can find the full answer on this thread:
http://www.nabble.com/Sending-Emails-Via-Wicket--t3639601.html

Hope this helps,
--
     Jean-Baptiste Quenot
aka  John Banana   Qwerty
http://caraldi.com/jbq/

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[John Krasnay]

Thanks for the tip, but could you give us a little more of a clue? For
example, from where should we get the RequestCycle? Using
RequestCycle.get() doesn't sound right, since that's for the response
we're sending to the browser, not for the HTML we want to render into
the email.

I looked into the WicketTester, as suggested by a previous response. It
creates a WebRequestCycle, but it needs quite a bit of plumbing like
a mock session, request, response, application, etc. Is this what we
really have to do, in addition to using the StringRequestTarget?

jk

On Sat, Jun 23, 2007 at 04:30:23PM +0200, Jean-Baptiste Quenot wrote:

> * Srinu Sunkara:
>
> > Hi - I am trying to get the  HTML source code of a web page with
> > in the program  (so that I can send this  in an email). Can some
> > one tell me how can I get the HTML source.
>
> Sure.  Processing a Wicket page and sending the result to a buffer
> can be achieved through  StringRequestTarget, thus allowing you to
> use the buffer contents for sending email.
>
> See RequestCycle.setRequestTarget()
>
> You can find the full answer on this thread:
> http://www.nabble.com/Sending-Emails-Via-Wicket--t3639601.html
>
> Hope this helps,
> --
>      Jean-Baptiste Quenot
> aka  John Banana   Qwerty
> http://caraldi.com/jbq/
>
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[igor.vaynberg]

On 6/23/07, John Krasnay <john@...> wrote:

Thanks for the tip, but could you give us a little more of a clue? For
example, from where should we get the RequestCycle? Using
RequestCycle.get() doesn't sound right, since that's for the response
we're sending to the browser, not for the HTML we want to render into
the email.

I looked into the WicketTester, as suggested by a previous response. It
creates a WebRequestCycle, but it needs quite a bit of plumbing like
a mock session, request, response, application, etc. Is this what we
really have to do, in addition to using the StringRequestTarget?

see our tests. all the mock setup is done for you. our tests simply call a few methods and get a page rendered into a string that is then compared to another file.

-igor

 

jk

On Sat, Jun 23, 2007 at 04:30:23PM +0200, Jean-Baptiste Quenot wrote:

> * Srinu Sunkara:
>
> > Hi - I am trying to get the  HTML source code of a web page with
> > in the program  (so that I can send this  in an email). Can some
> > one tell me how can I get the HTML source.
>
> Sure.  Processing a Wicket page and sending the result to a buffer
> can be achieved through  StringRequestTarget, thus allowing you to
> use the buffer contents for sending email.
>

> See RequestCycle.setRequestTarget()

>
> You can find the full answer on this thread:
> http://www.nabble.com/Sending-Emails-Via-Wicket--t3639601.html
>
> Hope this helps,
> --
>      Jean-Baptiste Quenot
> aka  John Banana   Qwerty
> http://caraldi.com/jbq/
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by DB2 Express
> Download DB2 Express C - the FREE version of DB2 express and take
> control of your XML. No limits. Just data. Click to get it now.
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[John Krasnay]

OK, so WicketTester is the way to go. JBQ's response implied that there
was a more direct way to do it, but I'll give WicketTester a try.

Thanks,

jk

On Sat, Jun 23, 2007 at 08:05:58PM -0700, Igor Vaynberg wrote:
>
>    see our tests. all the mock setup is done for you. our tests simply call a
>    few methods and get a page rendered into a string that is then compared to
>    another file.
>
>    -igor


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[Jean-Baptiste Quenot-3]

* John Krasnay:
> OK, so WicketTester is the way to go. JBQ's response implied that there
> was a more direct way to do it, but I'll give WicketTester a try.

Yes there is a more direct way.  I'm sorry I made an error, I
meant StringResponse, not StringRequestTarget.  I spent a few
minutes writing the example, as this is a recurring question, here
it is:

http://svn.apache.org/viewvc/incubator/wicket/trunk/jdk-1.5/wicket-examples/src/main/java/org/apache/wicket/examples/staticpages/Application.java?revision=550248&view=markup

Look at the very bottom, where I'm using a custom
BookmarkablePageRequestTarget:

new BookmarkablePageRequestTarget(Page.class, params) {
        /**
         * @see org.apache.wicket.request.target.component.BookmarkablePageRequestTarget#respond(org.apache.wicket.RequestCycle)
         */
        @Override
        public void respond(RequestCycle requestCycle)
        {
                if (requestParams.getString("email") != null) {
                        final StringResponse emailResponse = new StringResponse();
                        final WebResponse originalResponse = (WebResponse)RequestCycle.get().getResponse();
                        RequestCycle.get().setResponse(emailResponse);
                        super.respond(requestCycle);
                        // Here send the email instead of dumping it to stdout!
                        System.out.println(emailResponse.toString());
                        RequestCycle.get().setResponse(originalResponse);
                        RequestCycle.get().setRequestTarget(new BookmarkablePageRequestTarget(Sent.class));
                } else {
                        super.respond(requestCycle);
                }
        }
};

The example can be found in latest wicket examples in the
"staticpages" demo.
--
     Jean-Baptiste Quenot
aka  John Banana   Qwerty
http://caraldi.com/jbq/

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[John Krasnay]

Ah, that makes more sense. Thanks for the clarification and example.

jk

On Sun, Jun 24, 2007 at 05:15:14PM +0200, Jean-Baptiste Quenot wrote:
>
> Yes there is a more direct way.  I'm sorry I made an error, I
> meant StringResponse, not StringRequestTarget.  I spent a few
> minutes writing the example, as this is a recurring question, here
> it is:
>

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[Jeremy Thomerson-2]

I hope someone can give me a hand.  I'm trying to do something similar, and seemingly stumped.

I have a form that I want to have the user fill out, and then I just want to email the completed form to someone on our team.  So, I created subclasses of form components that can be switched from "edit" to "view" mode, and that works great.  So, I submit the form, and swap them out to "view" mode so that it is the exact same form, except instead of text fields and the like, I then have labels that display the input, in an un-editable way.

Now, the problem: In the onSubmit() of my Button, I switch the fields over, and then I would like to render the page to a String and email it, and then render the page for the user.

I've tried the methods below, and both are failing - can someone please help.

First, I tried JBQ's method, slightly modified since I'm not in a request target.  Maybe that's the problem.  Maybe I need to specifically mount this page to a request strategy as he does in the example.  But, I'd rather be able to accomplish this in the form itself.

    final StringResponse emailResponse = new StringResponse();
    final WebResponse originalResponse = (WebResponse)RequestCycle.get().getResponse();
    RequestCycle.get ().setResponse(emailResponse);
    RequestCycle.get().getRequestTarget().respond(RequestCycle.get());
    // Here send the email instead of dumping it to stdout!
    System.out.println(emailResponse.toString());
    RequestCycle.get().setResponse(originalResponse);
    RequestCycle.get().setRequestTarget(new BookmarkablePageRequestTarget(Home.class));

I get this error (BTW - I'm on 1.2.6 with this app until we have an RC release):

Caused by: java.lang.ClassCastException: wicket.response.StringResponse
    at wicket.protocol.http.WebRequestCycle.getWebResponse(WebRequestCycle.java:110)
    at wicket.markup.html.WebPage.configureResponse (WebPage.java:249)
    at wicket.markup.html.pages.ExceptionErrorPage.configureResponse(ExceptionErrorPage.java:106)
    at wicket.Page.onRender(Page.java:854)
    at wicket.Component.render(Component.java:1526)
    at wicket.Page.renderPage(Page.java:408)
    at wicket.request.target.component.PageRequestTarget.respond(PageRequestTarget.java:67)
    at wicket.request.compound.DefaultResponseStrategy.respond(DefaultResponseStrategy.java :49)
    at wicket.request.compound.AbstractCompoundRequestCycleProcessor.respond(AbstractCompoundRequestCycleProcessor.java:66)
    at wicket.RequestCycle.respond(RequestCycle.java:950)
    at wicket.RequestCycle.step (RequestCycle.java:1025)

I also tried using WicketTester in my onSubmit, and it failed:

                WicketTester tester = new WicketTester();
                tester.startPage(AdvertiseOnTHF.this);
                String email = tester.getServletResponse().getDocument();
                // Here send the email instead of dumping it to stdout!
                System.out.println("EMAIL: " + email);
                info("Your request has been sent.");

I can't do this because a lot of things in my app depend on getSession() being my sub-class of WebSession, and getApp() being my sub-class of WebApp.

So, what to do?  Any suggestions?  Should I just mount this form specifically to a request strategy and do it more like JBQ's example?

Thank you!
Jeremy Thomerson

On 6/24/07, Jean-Baptiste Quenot <jbq@...> wrote:

* John Krasnay:
> OK, so WicketTester is the way to go. JBQ's response implied that there
> was a more direct way to do it, but I'll give WicketTester a try.

Yes there is a more direct way.  I'm sorry I made an error, I
meant StringResponse, not StringRequestTarget.  I spent a few
minutes writing the example, as this is a recurring question, here
it is:

http://svn.apache.org/viewvc/incubator/wicket/trunk/jdk-1.5/wicket-examples/src/main/java/org/apache/wicket/examples/staticpages/Application.java?revision=550248&view=markup

Look at the very bottom, where I'm using a custom
BookmarkablePageRequestTarget:

new BookmarkablePageRequestTarget(Page.class, params) {
        /**
         * @see org.apache.wicket.request.target.component.BookmarkablePageRequestTarget#respond(org.apache.wicket.RequestCycle )
         */
        @Override
        public void respond(RequestCycle requestCycle)
        {
                if (requestParams.getString("email") != null) {
                        final StringResponse emailResponse = new StringResponse();
                        final WebResponse originalResponse = (WebResponse)RequestCycle.get().getResponse();
                        RequestCycle.get().setResponse(emailResponse);
                        super.respond (requestCycle);
                        // Here send the email instead of dumping it to stdout!
                        System.out.println(emailResponse.toString());
                        RequestCycle.get().setResponse(originalResponse);
                        RequestCycle.get().setRequestTarget(new BookmarkablePageRequestTarget(Sent.class));
                } else {
                        super.respond(requestCycle);
                }
        }
};

The example can be found in latest wicket examples in the
"staticpages" demo.
--
     Jean-Baptiste Quenot
aka  John Banana   Qwerty
http://caraldi.com/jbq/

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[Jean-Baptiste Quenot-3]

* Jeremy Thomerson:

> I hope someone can give me a hand.  I'm trying to do something similar, and
> seemingly stumped.
>
> I have a form that I want to have the user fill out, and then I just want to
> email the completed form to someone on our team.  So, I created subclasses
> of form components that can be switched from "edit" to "view" mode, and that
> works great.  So, I submit the form, and swap them out to "view" mode so
> that it is the exact same form, except instead of text fields and the like,
> I then have labels that display the input, in an un-editable way.
>
> Now, the problem: In the onSubmit() of my Button, I switch the fields over,
> and then I would like to render the page to a String and email it, and then
> render the page for the user.
>
> I've tried the methods below, and both are failing - can someone please
> help.
>
> First, I tried JBQ's method, slightly modified since I'm not in a request
> target.  Maybe that's the problem.  Maybe I need to specifically mount this
> page to a request strategy as he does in the example.  But, I'd rather be
> able to accomplish this in the form itself.
>
>    final StringResponse emailResponse = new StringResponse();
>    final WebResponse originalResponse =
> (WebResponse)RequestCycle.get().getResponse();
>    RequestCycle.get().setResponse(emailResponse);
>    RequestCycle.get().getRequestTarget().respond(RequestCycle.get());
>    // Here send the email instead of dumping it to stdout!
>    System.out.println(emailResponse.toString());
>    RequestCycle.get().setResponse(originalResponse);
>    RequestCycle.get().setRequestTarget(new BookmarkablePageRequestTarget(
> Home.class));
>
> I get this error (BTW - I'm on 1.2.6 with this app until we have an RC
> release):
>
> Caused by: java.lang.ClassCastException: wicket.response.StringResponse
>    at wicket.protocol.http.WebRequestCycle.getWebResponse(
> WebRequestCycle.java:110)
>    at wicket.markup.html.WebPage.configureResponse(WebPage.java:249)
>    at wicket.markup.html.pages.ExceptionErrorPage.configureResponse(
> ExceptionErrorPage.java:106)
>    at wicket.Page.onRender(Page.java:854)
>    at wicket.Component.render(Component.java:1526)
>    at wicket.Page.renderPage(Page.java:408)
>    at wicket.request.target.component.PageRequestTarget.respond(
> PageRequestTarget.java:67)
>    at wicket.request.compound.DefaultResponseStrategy.respond(
> DefaultResponseStrategy.java:49)
>    at wicket.request.compound.AbstractCompoundRequestCycleProcessor.respond
> (AbstractCompoundRequestCycleProcessor.java:66)
>    at wicket.RequestCycle.respond(RequestCycle.java:950)
>    at wicket.RequestCycle.step(RequestCycle.java:1025)

It's not your fault.  I didn't mention that you need to upgrade to
the latest beta2 for this to work, as there is a nasty cast to
WebResponse in WebPage.java that I removed.
--
     Jean-Baptiste Quenot
aka  John Banana   Qwerty
http://caraldi.com/jbq/

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[Tremelune]

I'm having a great deal of trouble getting this to fire. How does one accomplish this in the middle of, say, some run-of-the-mill Wicket page? If I do something like this, I get an error that "/pages" has already been mounted (which it has, during my app's initialization). I also tried to do all this in a unit test, but the overridden method never fired. I can't seem to figure out where this gets plugged in. Example:

class Welcome extends WebPage {
  Welcome() {
    ((WebApplication) getApplication()).mount(new URIRequestTargetUrlCodingStrategy("/pages") {
      @Override
      public IRequestTarget decode(RequestParameters requestParameters) {
        final ValueMap requestParams = decodeParameters(requestParameters);
        PageParameters params = new PageParameters();
        params.put("uri", requestParams.get(URI));
        return new BookmarkablePageRequestTarget(Page.class, params) {
          @Override
          public void respond(RequestCycle requestCycle) {
            if (requestParams.getString("email") != null) {
              final StringResponse emailResponse = new StringResponse();
              final WebResponse originalResponse = (WebResponse) RequestCycle.get().getResponse();
              RequestCycle.get().setResponse(emailResponse);
              super.respond(requestCycle);
              // Here send the email instead of dumping it to stdout!
              System.out.println(emailResponse.toString());
              RequestCycle.get().setResponse(originalResponse);
              RequestCycle.get().setRequestTarget(new BookmarkablePageRequestTarget(TestEmail.class));
            } else {
              super.respond(requestCycle);
            }
          }
        };
      }
    });
  }
}

[David Bernard-2]

Why do you mount in the WebPage and not in the Application.init() ?

I'm new to wicket. A problem, I see is that each time the Welcome page is instantiated, then you try to mount (re add the rules).
(You copy from the staticpage examples but you don't paste in Application like in the examples.)

Regards.

Tremelune wrote:

> I'm having a great deal of trouble getting this to fire. How does one
> accomplish this in the middle of, say, some run-of-the-mill Wicket page? If
> I do something like this, I get an error that "/pages" has already been
> mounted (which it has, during my app's initialization). I also tried to do
> all this in a unit test, but the overridden method never fired. I can't seem
> to figure out where this gets plugged in. Example:
>
> class Welcome extends WebPage {
>   Welcome() {
>     ((WebApplication) getApplication()).mount(new
> URIRequestTargetUrlCodingStrategy("/pages") {
>       @Override
>       public IRequestTarget decode(RequestParameters requestParameters) {
>         final ValueMap requestParams = decodeParameters(requestParameters);
>         PageParameters params = new PageParameters();
>         params.put("uri", requestParams.get(URI));
>         return new BookmarkablePageRequestTarget(Page.class, params) {
>           @Override
>           public void respond(RequestCycle requestCycle) {
>             if (requestParams.getString("email") != null) {
>               final StringResponse emailResponse = new StringResponse();
>               final WebResponse originalResponse = (WebResponse)
> RequestCycle.get().getResponse();
>               RequestCycle.get().setResponse(emailResponse);
>               super.respond(requestCycle);
>               // Here send the email instead of dumping it to stdout!
>               System.out.println(emailResponse.toString());
>               RequestCycle.get().setResponse(originalResponse);
>               RequestCycle.get().setRequestTarget(new
> BookmarkablePageRequestTarget(TestEmail.class));
>             } else {
>               super.respond(requestCycle);
>             }
>           }
>         };
>       }
>     });
>   }
> }
>

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[Tremelune]

Well, I don't want to render these emails during initialization. They will probably need request-time parameters. I will need to be able to render different HTML depending on certain request parameters.

I'm mucking around with WicketTester some, and I'm going to try and extend (and set) WebApplication to do some of this in init() and see what happens.




Why do you mount in the WebPage and not in the Application.init() ?

I'm new to wicket. A problem, I see is that each time the Welcome page is instantiated, then you try to mount (re add the rules).
(You copy from the staticpage examples but you don't paste in Application like in the examples.)

[Tremelune]

So here's a junit test:

  public void testThisThing() {
    System.out.println("Testing...");
    WicketTester tester = new WicketTester(new TestApp());

    System.out.println("Testing page thing");
    tester.startPage(TestEmail.class);
  }

  private class TestApp extends WebApplication {
    public Class getHomePage() {
      return TestEmail.class;
    }

    protected void init() {
      super.init();

      System.out.println("Initifying");
      mount(new URIRequestTargetUrlCodingStrategy("/pages") {
        @Override
        public IRequestTarget decode(RequestParameters requestParameters) {
          System.out.println("Decoderizing");
          final ValueMap requestParams = decodeParameters(requestParameters);
          PageParameters params = new PageParameters();
          params.put("uri", requestParams.get(URI));
          return new BookmarkablePageRequestTarget(Page.class, params) {
            @Override
            public void respond(RequestCycle requestCycle) {
              System.out.println("Respondificating");
              if (requestParams.getString("email") != null) {
                StringResponse emailResponse = new StringResponse();
                WebResponse originalResponse = (WebResponse) RequestCycle.get().getResponse();
                RequestCycle.get().setResponse(emailResponse);
                super.respond(requestCycle);
                // Here send the email instead of dumping it to stdout!
                System.out.println(emailResponse.toString());
                RequestCycle.get().setResponse(originalResponse);
                RequestCycle.get().setRequestTarget(new BookmarkablePageRequestTarget(TestEmail.class));
              } else {
                super.respond(requestCycle);
              }
            }
          };
        }
      });
    }
  }

Here's the output:

Testing...
Initifying
********************************************************************
*** WARNING: Wicket is running in DEVELOPMENT mode.              ***
***                               ^^^^^^^^^^^                    ***
*** Do NOT deploy to your live server(s) without changing this.  ***
*** See Application#getConfigurationType() for more information. ***
********************************************************************
Testing page thing

The URIRequestTargetUrlCodingStrategy stuff just doesn't want to fire...Things are murky for me at this point. I'm mostly poking around at examples and I'm not sure what is doing what exactly.

[David Bernard-2]

the email isn't displayed because : your rule is associated to the mount point "/pages" and you don't call it.
You need to call "/pages" with a parameter (queryString) email not null. (I don't know how to simulate this with WicketTester)


Tremelune wrote:

> So here's a junit test:
>
>   public void testThisThing() {
>     System.out.println("Testing...");
>     WicketTester tester = new WicketTester(new TestApp());
>
>     System.out.println("Testing page thing");
>     tester.startPage(TestEmail.class);
>   }
>
>   private class TestApp extends WebApplication {
>     public Class getHomePage() {
>       return TestEmail.class;
>     }
>
>     protected void init() {
>       super.init();
>
>       System.out.println("Initifying");
>       mount(new URIRequestTargetUrlCodingStrategy("/pages") {
>         @Override
>         public IRequestTarget decode(RequestParameters requestParameters) {
>           System.out.println("Decoderizing");
>           final ValueMap requestParams =
> decodeParameters(requestParameters);
>           PageParameters params = new PageParameters();
>           params.put("uri", requestParams.get(URI));
>           return new BookmarkablePageRequestTarget(Page.class, params) {
>             @Override
>             public void respond(RequestCycle requestCycle) {
>               System.out.println("Respondificating");
>               if (requestParams.getString("email") != null) {
>                 StringResponse emailResponse = new StringResponse();
>                 WebResponse originalResponse = (WebResponse)
> RequestCycle.get().getResponse();
>                 RequestCycle.get().setResponse(emailResponse);
>                 super.respond(requestCycle);
>                 // Here send the email instead of dumping it to stdout!
>                 System.out.println(emailResponse.toString());
>                 RequestCycle.get().setResponse(originalResponse);
>                 RequestCycle.get().setRequestTarget(new
> BookmarkablePageRequestTarget(TestEmail.class));
>               } else {
>                 super.respond(requestCycle);
>               }
>             }
>           };
>         }
>       });
>     }
>   }
>
> Here's the output:
>
> Testing...
> Initifying
> ********************************************************************
> *** WARNING: Wicket is running in DEVELOPMENT mode.              ***
> ***                               ^^^^^^^^^^^                    ***
> *** Do NOT deploy to your live server(s) without changing this.  ***
> *** See Application#getConfigurationType() for more information. ***
> ********************************************************************
> Testing page thing
>
> The URIRequestTargetUrlCodingStrategy stuff just doesn't want to
> fire...Things are murky for me at this point. I'm mostly poking around at
> examples and I'm not sure what is doing what exactly.

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[Tremelune]

That's true, but the real problem is that decode() isn't firing at all.




the email isn't displayed because : your rule is associated to the mount point "/pages" and you don't call it.
You need to call "/pages" with a parameter (queryString) email not null. (I don't know how to simulate this with WicketTester)

[David Bernard-2]

decode() is fired when you call "/pages" url. In the init() you only "define" the method.

Tremelune wrote:

> That's true, but the real problem is that decode() isn't firing at all.
>
>
>
>
> the email isn't displayed because : your rule is associated to the mount
> point "/pages" and you don't call it.
> You need to call "/pages" with a parameter (queryString) email not null. (I
> don't know how to simulate this with WicketTester)
>
>

-------------------------------------------------------------------------
This SF.net email is sponsored by DB2 Express
Download DB2 Express C - the FREE version of DB2 express and take
control of your XML. No limits. Just data. Click to get it now.
http://sourceforge.net/powerbar/db2/
_______________________________________________
Wicket-user mailing list
Wicket-user@...
https://lists.sourceforge.net/lists/listinfo/wicket-user