Re: [Wicket-user] Re: Servlet forward to a JSP
I think a very nice addition to this would be to allow the included JSP to have access to the
current component model.
./alex
--
.w( the_mindstorm )p.
#: Robert McClay changed the world a bit at a time by saying on 11/14/2005
9:27 AM :#
Here's a starting point if anyone wants to include a servlet / jsp in
their page via RequestDispatcher.
public class IncludeServlet extends WebComponent {
private static final long serialVersionUID = 1L;
public IncludeServlet(String id) {
super(id);
}
public IncludeServlet(String id, IModel model) {
super(id, model);
}
protected void onComponentTagBody(MarkupStream markupStream,
ComponentTag openTag) {
ServletWebRequest servletWebRequest =
(ServletWebRequest) getRequest();
HttpServletRequest request =
servletWebRequest.getHttpServletRequest();
WebResponse webResponse = (WebResponse)
getRequestCycle().getOriginalResponse();
HttpServletResponse response =
webResponse.getHttpServletResponse();
RequestDispatcher dispatcher = ((ServletWebRequest)
getRequest()).getHttpServletRequest().getRequestDispatcher(getModelObjectAsString());
GenericServletResponseWrapper wrappedResponse = new
GenericServletResponseWrapper(response);
try {
dispatcher.include(request, wrappedResponse);
} catch (ServletException e) {
throw new RuntimeException(e);
} catch (IOException e) {
throw new RuntimeException(e);
}
replaceComponentTagBody(markupStream, openTag, new
String(wrappedResponse.getData()));
}
}
class GenericServletOutputStream extends ServletOutputStream {
private OutputStream out;
public GenericServletOutputStream(OutputStream out) {
this.out = out;
}
public void write(int b) throws IOException {
out.write(b);
}
public void write(byte[] b) throws IOException {
out.write(b);
}
public void write(byte[] b, int off, int len) throws IOException {
out.write(b, off, len);
}
}
class GenericServletResponseWrapper extends HttpServletResponseWrapper {
private ByteArrayOutputStream output;
public GenericServletResponseWrapper(HttpServletResponse response) {
super(response);
output = new ByteArrayOutputStream();
}
public byte[] getData() {
return output.toByteArray();
}
public ServletOutputStream getOutputStream() {
return new GenericServletOutputStream(output);
}
public PrintWriter getWriter() {
return new PrintWriter(getOutputStream(), true);
}
}
On 2005-11-06 16:27:44 -0700, Eelco Hillenius [EMAIL PROTECTED] said:
Ah, yes. True. It used to resolve local includes using
javax.servlet.RequestDispatcher, i which case including request
attributes would work. However, that proved to be quite problametic
and we changed it to always use the absolute requests.
What you need shouldn't be too hard however. But it is not something
Wicket supports out-of-the-box (and I'm not sure whether that would be
in Wicket's scope either).
You don't need Wicket to tell stopping any processing, as that is
already part of the idea of component orientation. What you need (to
build) is a component that gets the content you want to include during
it's rendering process. E.g. by letting your component extend from
WebComponent and overriding method onComponentTagBody to do the work.
In this method, you'll probably want to use the request processor:
RequestDispatcher dispatcher
((ServletWebRequest)getRequest()).getHttpServletRequest()
.getRequestDispatcher(*path-to-jsp*);
For the including.
Eelco
---
SF.Net email is sponsored by:
Tame your development challenges with Apache's Geronimo App Server. Download
it for free - -and be entered to win a 42 plasma tv or your very own
Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php
___
Wicket-user mailing list
Wicket-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/wicket-user
---
This SF.Net email is sponsored by the JBoss Inc. Get Certified Today
Register for a JBoss Training Course. Free Certification Exam
for All Training Attendees Through End of 2005. For more info visit:
http://ads.osdn.com/?ad_id=7628alloc_id=16845op=click
___
Wicket-user mailing list
Wicket-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] Re: Servlet forward to a JSP
Shouldn't we add such functionality to core? Or at least extension. I
understand that the way it is implemented is because he didn't want to
patch core, but I assume it can be put into core and made available to
users more easily: no specific request and response wrapper etc.
Juergen
On 11/14/05, Robert McClay [EMAIL PROTECTED] wrote:
Here's a starting point if anyone wants to include a servlet / jsp in
their page via RequestDispatcher.
public class IncludeServlet extends WebComponent {
private static final long serialVersionUID = 1L;
public IncludeServlet(String id) {
super(id);
}
public IncludeServlet(String id, IModel model) {
super(id, model);
}
protected void onComponentTagBody(MarkupStream markupStream,
ComponentTag openTag) {
ServletWebRequest servletWebRequest =
(ServletWebRequest) getRequest();
HttpServletRequest request =
servletWebRequest.getHttpServletRequest();
WebResponse webResponse = (WebResponse)
getRequestCycle().getOriginalResponse();
HttpServletResponse response =
webResponse.getHttpServletResponse();
RequestDispatcher dispatcher = ((ServletWebRequest)
getRequest()).getHttpServletRequest().getRequestDispatcher(getModelObjectAsString());
GenericServletResponseWrapper wrappedResponse = new
GenericServletResponseWrapper(response);
try {
dispatcher.include(request, wrappedResponse);
} catch (ServletException e) {
throw new RuntimeException(e);
} catch (IOException e) {
throw new RuntimeException(e);
}
replaceComponentTagBody(markupStream, openTag, new
String(wrappedResponse.getData()));
}
}
class GenericServletOutputStream extends ServletOutputStream {
private OutputStream out;
public GenericServletOutputStream(OutputStream out) {
this.out = out;
}
public void write(int b) throws IOException {
out.write(b);
}
public void write(byte[] b) throws IOException {
out.write(b);
}
public void write(byte[] b, int off, int len) throws IOException {
out.write(b, off, len);
}
}
class GenericServletResponseWrapper extends HttpServletResponseWrapper {
private ByteArrayOutputStream output;
public GenericServletResponseWrapper(HttpServletResponse response) {
super(response);
output = new ByteArrayOutputStream();
}
public byte[] getData() {
return output.toByteArray();
}
public ServletOutputStream getOutputStream() {
return new GenericServletOutputStream(output);
}
public PrintWriter getWriter() {
return new PrintWriter(getOutputStream(), true);
}
}
On 2005-11-06 16:27:44 -0700, Eelco Hillenius [EMAIL PROTECTED] said:
Ah, yes. True. It used to resolve local includes using
javax.servlet.RequestDispatcher, i which case including request
attributes would work. However, that proved to be quite problametic
and we changed it to always use the absolute requests.
What you need shouldn't be too hard however. But it is not something
Wicket supports out-of-the-box (and I'm not sure whether that would be
in Wicket's scope either).
You don't need Wicket to tell stopping any processing, as that is
already part of the idea of component orientation. What you need (to
build) is a component that gets the content you want to include during
it's rendering process. E.g. by letting your component extend from
WebComponent and overriding method onComponentTagBody to do the work.
In this method, you'll probably want to use the request processor:
RequestDispatcher dispatcher
((ServletWebRequest)getRequest()).getHttpServletRequest()
.getRequestDispatcher(*path-to-jsp*);
For the including.
Eelco
---
SF.Net email is sponsored by:
Tame your development challenges with Apache's Geronimo App Server. Download
it for free - -and be entered to win a 42 plasma tv or your very own
Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php
___
Wicket-user mailing list
Wicket-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/wicket-user
---
SF.Net email is sponsored by:
Tame your development challenges with Apache's Geronimo App Server. Download
it for free - -and be entered to win a 42 plasma tv or your very own
Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php
___
Wicket-user mailing list
Wicket-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/wicket-user
[Wicket-user] Re: Servlet forward to a JSP
If I come up with anything useful I'd be happy to contribute. The JSP I need to forward to requires request attributes, so I don't think the wicket.markup.html.include.Include component will work as from what I understand it is a separate request whose output is then included into the markup? In this case, the result of RedirectPage would be the same as it is a fresh browser request and I need to populate a request with request.setAttribute() and have the JSP be able to retrieve the request attributes. What I'm looking for is a way in Wicket to tell it to finish its processing, not output any markup, and then forward the request to another servlet, not include or redirect. Thanks. On 2005-11-06 15:38:06 -0700, Eelco Hillenius [EMAIL PROTECTED] said: Sure. Use wicket.markup.html.pages.RedirectPage for server-side redirecting to a non-wicket locations. If you want to inlcude things likes JSP pages into Wicket pages, you can use the wicket.markup.html.include.Include component. The latter is a bit rough, so if you need better support on that one, please contribute ;) Eelco On 11/6/05, Robert McClay [EMAIL PROTECTED] wrote: I'm exploring the possibility of integrating Wicket into a JSP application. Is it possible to tell Wicket to do a servlet forward to a JSP? I would like to add a few request attributes and then forward to a JSP. The reason I'd like to do a forward VS include is I need to be able to populate request attributes prior to the JSP running. The login page is currently implemented in JSP. Another option would be to refactor the login page, but I'm curious if it is feasibile to attempt the former as I want to use as much of the existing system as possible. Thanks. --- SF.Net email is sponsored by: Tame your development challenges with Apache's Geronimo App Server. Downl oad it for free - -and be entered to win a 42 plasma tv or your very own Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user --- SF.Net email is sponsored by: Tame your development challenges with Apache's Geronimo App Server. Download it for free - -and be entered to win a 42 plasma tv or your very own Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php --- SF.Net email is sponsored by: Tame your development challenges with Apache's Geronimo App Server. Download it for free - -and be entered to win a 42 plasma tv or your very own Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] Re: Servlet forward to a JSP
Ah, yes. True. It used to resolve local includes using javax.servlet.RequestDispatcher, i which case including request attributes would work. However, that proved to be quite problametic and we changed it to always use the absolute requests. What you need shouldn't be too hard however. But it is not something Wicket supports out-of-the-box (and I'm not sure whether that would be in Wicket's scope either). You don't need Wicket to tell stopping any processing, as that is already part of the idea of component orientation. What you need (to build) is a component that gets the content you want to include during it's rendering process. E.g. by letting your component extend from WebComponent and overriding method onComponentTagBody to do the work. In this method, you'll probably want to use the request processor: RequestDispatcher dispatcher = ((ServletWebRequest)getRequest()).getHttpServletRequest() .getRequestDispatcher(*path-to-jsp*); For the including. Eelco Eelco On 11/6/05, Robert McClay [EMAIL PROTECTED] wrote: If I come up with anything useful I'd be happy to contribute. The JSP I need to forward to requires request attributes, so I don't think the wicket.markup.html.include.Include component will work as from what I understand it is a separate request whose output is then included into the markup? In this case, the result of RedirectPage would be the same as it is a fresh browser request and I need to populate a request with request.setAttribute() and have the JSP be able to retrieve the request attributes. What I'm looking for is a way in Wicket to tell it to finish its processing, not output any markup, and then forward the request to another servlet, not include or redirect. Thanks. On 2005-11-06 15:38:06 -0700, Eelco Hillenius [EMAIL PROTECTED] said: Sure. Use wicket.markup.html.pages.RedirectPage for server-side redirecting to a non-wicket locations. If you want to inlcude things likes JSP pages into Wicket pages, you can use the wicket.markup.html.include.Include component. The latter is a bit rough, so if you need better support on that one, please contribute ;) Eelco On 11/6/05, Robert McClay [EMAIL PROTECTED] wrote: I'm exploring the possibility of integrating Wicket into a JSP application. Is it possible to tell Wicket to do a servlet forward to a JSP? I would like to add a few request attributes and then forward to a JSP. The reason I'd like to do a forward VS include is I need to be able to populate request attributes prior to the JSP running. The login page is currently implemented in JSP. Another option would be to refactor the login page, but I'm curious if it is feasibile to attempt the former as I want to use as much of the existing system as possible. Thanks. --- SF.Net email is sponsored by: Tame your development challenges with Apache's Geronimo App Server. Downl oad it for free - -and be entered to win a 42 plasma tv or your very own Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user --- SF.Net email is sponsored by: Tame your development challenges with Apache's Geronimo App Server. Download it for free - -and be entered to win a 42 plasma tv or your very own Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php --- SF.Net email is sponsored by: Tame your development challenges with Apache's Geronimo App Server. Download it for free - -and be entered to win a 42 plasma tv or your very own Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user --- SF.Net email is sponsored by: Tame your development challenges with Apache's Geronimo App Server. Download it for free - -and be entered to win a 42 plasma tv or your very own Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
