Re: [T4] PageRedirectException in pageValidate after AjaxDirectLink
Tapestry 4.0.x with tacos probably doesn't add the request header...
just the parameter. So, what you're seeing is consistent, and if
you want to plan ahead, check for the existence of either of those
On Thu, Mar 27, 2008 at 11:32 PM, Kelly Merrell <[EMAIL PROTECTED]> wrote:
> Thanks for the example Steve. My only issue is that I don't seem to be
> getting a "dojo-ajax-request" header in the request. There is a
> "dojoRequest" parameter, which seems like I can use it for the same
> purpose. Are you using a version of Tapestry greater than 4.02?
>
> I'm going to try to adopt your method, but without moving my
> authentication code into the servlet filter.
>
> Thanks again!
>
>
>
> Steve Shucker wrote:
> > I already had a servlet filter doing some custom authentication and
> > handling redirects to a separate login service for expired sessions,
> > so I added a little extra code in there. First off, you can identify
> > ajax requests by the presence of an HttpServletRequest header called
> > "dojo-ajax-request" with a value of "true". If I see that header, I
> > write my own custom response instead of going down the filter chain.
> > Here's the method I use to build the response:
> >
> >private void sendAjaxRedirect(HttpServletResponse httpResponse)
> > throws IOException {
> >PrintWriter writer = httpResponse.getWriter();
> >writer.write("");
> >writer.write(" > Transitional//EN\"
> > \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\";
> > [\n\n]>\n");
> >writer.write("");
> >writer.write(" > type=\"script\">\n// >writer.write("window.location.href = '" +
> > params.getOriginalUrl() + "';\n");
> >writer.write("//]]>\n");
> >writer.write("");
> >}
> >
> > replace "params.getOriginalUrl()" with the entry URL for your app.
> >
> > This code generates a response that the tapestry/dojo wiring will
> > interpret by parsing the window.location.href javascript.
> >
> > -Steve
> >
> > Kelly Merrell wrote:
> >> I'm having a problem with my authentication redirect when using Ajax
> >> to update page components. I use PageRedirectException on each page
> >> to redirect to a login page if the user is not logged in when the
> >> page validates. This works as expected when hitting the page
> >> normally, but if I am using an AjaxDirectLink after the login has
> >> expired, the response is returned as the HTML of the login page and
> >> not "handled" by AjaxDirectService so that it is wrapped in the xml
> >> tags and have the "window.location.href" javascript redirect added.
> >> As the response is not xml, it breaks on the client side and the page
> >> does not redirect.
> >>
> >> I have seen a few other people bring up this issue, but I can't find
> >> any evidence of a solution or work around. I would have thought that
> >> this would be a common problem, but maybe I am just overlooking a
> >> simple fix. Any help here would be greatly appreciated!
> >>
> >> My pageValidate method is simply:
> >>
> >> public void pageValidate(PageEvent event) {
> >>if (!isLoggedIn()) {
> >>Login loginPage = getRedirectPage();
> >>throw new PageRedirectException(loginPage);
> >>}
> >> }
> >
>
>
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>
>
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Tapestry / Tacos developer
Open Source / JEE Consulting
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Re: [T4] PageRedirectException in pageValidate after AjaxDirectLink
I'm using 4.1.5 and I think I wrote that code against 4.1.3. I agree
that you shouldn't move your auth code into a filter - I only mentioned
that to explain why I wasn't handing you the whole filter code. You may
have to tweak the generated code a bit for 4.0.2. I just used firebug
to grab a dojo response and looked for some JS that I knew was
executing. Once you know to look for a custom header, the rest is easy.
-Steve
Kelly Merrell wrote:
Thanks for the example Steve. My only issue is that I don't seem to be
getting a "dojo-ajax-request" header in the request. There is a
"dojoRequest" parameter, which seems like I can use it for the same
purpose. Are you using a version of Tapestry greater than 4.02?
I'm going to try to adopt your method, but without moving my
authentication code into the servlet filter.
Thanks again!
Steve Shucker wrote:
I already had a servlet filter doing some custom authentication and
handling redirects to a separate login service for expired sessions,
so I added a little extra code in there. First off, you can identify
ajax requests by the presence of an HttpServletRequest header called
"dojo-ajax-request" with a value of "true". If I see that header, I
write my own custom response instead of going down the filter chain.
Here's the method I use to build the response:
private void sendAjaxRedirect(HttpServletResponse httpResponse)
throws IOException {
PrintWriter writer = httpResponse.getWriter();
writer.write("");
writer.write("Transitional//EN\"
\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\";
[\n\n]>\n");
writer.write("");
writer.write("type=\"script\">\n// writer.write("window.location.href = '" +
params.getOriginalUrl() + "';\n");
writer.write("//]]>\n");
writer.write("");
}
replace "params.getOriginalUrl()" with the entry URL for your app.
This code generates a response that the tapestry/dojo wiring will
interpret by parsing the window.location.href javascript.
-Steve
Kelly Merrell wrote:
I'm having a problem with my authentication redirect when using Ajax
to update page components. I use PageRedirectException on each page
to redirect to a login page if the user is not logged in when the
page validates. This works as expected when hitting the page
normally, but if I am using an AjaxDirectLink after the login has
expired, the response is returned as the HTML of the login page and
not "handled" by AjaxDirectService so that it is wrapped in the xml
tags and have the "window.location.href" javascript redirect added.
As the response is not xml, it breaks on the client side and the
page does not redirect.
I have seen a few other people bring up this issue, but I can't find
any evidence of a solution or work around. I would have thought that
this would be a common problem, but maybe I am just overlooking a
simple fix. Any help here would be greatly appreciated!
My pageValidate method is simply:
public void pageValidate(PageEvent event) {
if (!isLoggedIn()) {
Login loginPage = getRedirectPage();
throw new PageRedirectException(loginPage);
}
}
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Re: [T4] PageRedirectException in pageValidate after AjaxDirectLink
Thanks for the example Steve. My only issue is that I don't seem to be
getting a "dojo-ajax-request" header in the request. There is a
"dojoRequest" parameter, which seems like I can use it for the same
purpose. Are you using a version of Tapestry greater than 4.02?
I'm going to try to adopt your method, but without moving my
authentication code into the servlet filter.
Thanks again!
Steve Shucker wrote:
I already had a servlet filter doing some custom authentication and
handling redirects to a separate login service for expired sessions,
so I added a little extra code in there. First off, you can identify
ajax requests by the presence of an HttpServletRequest header called
"dojo-ajax-request" with a value of "true". If I see that header, I
write my own custom response instead of going down the filter chain.
Here's the method I use to build the response:
private void sendAjaxRedirect(HttpServletResponse httpResponse)
throws IOException {
PrintWriter writer = httpResponse.getWriter();
writer.write("");
writer.write("Transitional//EN\"
\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\";
[\n\n]>\n");
writer.write("");
writer.write("type=\"script\">\n// writer.write("window.location.href = '" +
params.getOriginalUrl() + "';\n");
writer.write("//]]>\n");
writer.write("");
}
replace "params.getOriginalUrl()" with the entry URL for your app.
This code generates a response that the tapestry/dojo wiring will
interpret by parsing the window.location.href javascript.
-Steve
Kelly Merrell wrote:
I'm having a problem with my authentication redirect when using Ajax
to update page components. I use PageRedirectException on each page
to redirect to a login page if the user is not logged in when the
page validates. This works as expected when hitting the page
normally, but if I am using an AjaxDirectLink after the login has
expired, the response is returned as the HTML of the login page and
not "handled" by AjaxDirectService so that it is wrapped in the xml
tags and have the "window.location.href" javascript redirect added.
As the response is not xml, it breaks on the client side and the page
does not redirect.
I have seen a few other people bring up this issue, but I can't find
any evidence of a solution or work around. I would have thought that
this would be a common problem, but maybe I am just overlooking a
simple fix. Any help here would be greatly appreciated!
My pageValidate method is simply:
public void pageValidate(PageEvent event) {
if (!isLoggedIn()) {
Login loginPage = getRedirectPage();
throw new PageRedirectException(loginPage);
}
}
-
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Re: [T4] PageRedirectException in pageValidate after AjaxDirectLink
I already had a servlet filter doing some custom authentication and
handling redirects to a separate login service for expired sessions, so
I added a little extra code in there. First off, you can identify ajax
requests by the presence of an HttpServletRequest header called
"dojo-ajax-request" with a value of "true". If I see that header, I
write my own custom response instead of going down the filter chain.
Here's the method I use to build the response:
private void sendAjaxRedirect(HttpServletResponse httpResponse)
throws IOException {
PrintWriter writer = httpResponse.getWriter();
writer.write("");
writer.write("Transitional//EN\"
\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"; [\nnbsp ' '>\n]>\n");
writer.write("");
writer.write("type=\"script\">\n// writer.write("window.location.href = '" +
params.getOriginalUrl() + "';\n");
writer.write("//]]>\n");
writer.write("");
}
replace "params.getOriginalUrl()" with the entry URL for your app.
This code generates a response that the tapestry/dojo wiring will
interpret by parsing the window.location.href javascript.
-Steve
Kelly Merrell wrote:
I'm having a problem with my authentication redirect when using Ajax
to update page components. I use PageRedirectException on each page to
redirect to a login page if the user is not logged in when the page
validates. This works as expected when hitting the page normally, but
if I am using an AjaxDirectLink after the login has expired, the
response is returned as the HTML of the login page and not "handled"
by AjaxDirectService so that it is wrapped in the xml tags and have
the "window.location.href" javascript redirect added. As the response
is not xml, it breaks on the client side and the page does not redirect.
I have seen a few other people bring up this issue, but I can't find
any evidence of a solution or work around. I would have thought that
this would be a common problem, but maybe I am just overlooking a
simple fix. Any help here would be greatly appreciated!
My pageValidate method is simply:
public void pageValidate(PageEvent event) {
if (!isLoggedIn()) {
Login loginPage = getRedirectPage();
throw new PageRedirectException(loginPage);
}
}
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To unsubscribe, e-mail: [EMAIL PROTECTED]
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[T4] PageRedirectException in pageValidate after AjaxDirectLink
I'm having a problem with my authentication redirect when using Ajax to
update page components. I use PageRedirectException on each page to
redirect to a login page if the user is not logged in when the page
validates. This works as expected when hitting the page normally, but if
I am using an AjaxDirectLink after the login has expired, the response
is returned as the HTML of the login page and not "handled" by
AjaxDirectService so that it is wrapped in the xml tags and have the
"window.location.href" javascript redirect added. As the response is not
xml, it breaks on the client side and the page does not redirect.
I have seen a few other people bring up this issue, but I can't find any
evidence of a solution or work around. I would have thought that this
would be a common problem, but maybe I am just overlooking a simple fix.
Any help here would be greatly appreciated!
My pageValidate method is simply:
public void pageValidate(PageEvent event) {
if (!isLoggedIn()) {
Login loginPage = getRedirectPage();
throw new PageRedirectException(loginPage);
}
}
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AW: [T4] PageRedirectException
If you can try something like this to get a fresh instance of the desired page.
@InjectPage("NameOfMyPage")
public abstract MyPage getMyPage();
With the instance acquired by this method you can do something like this
(pseudo code):
IPage page = getMyPage();
Use the page instance to get the validation delegate of it and register your
error against it.
getRequestCylce.activate( page );
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-Ursprüngliche Nachricht-
Von: Kolesnikov, Alexander GNI [mailto:[EMAIL PROTECTED]
Gesendet: Donnerstag, 22. März 2007 13:32
An: Tapestry users
Betreff: [T4] PageRedirectException
I am using contrib:Table to display the results of a search. If a search
returns zero results, I want to treat this as an error and to show the search
form again with this error in the same way as if it was a faulty user input
validation.
It seems to me that a good solution to throw a PageRedirectException at the
moment when the Table component receives a source with 0 records in it. I have
tried to do this in the method that provides the model for the page, like so:
public IBasicTableModel getModel() {
// some code to prepare the model
if (model.getRowCount() == 0) {
throw new PageRedirectException("Search");
}
return model;
}
But in this case the PageRedirectException was not caught by Tapestry but
propagated.
Another attempt was to override the renderComponent() method of the Table
component, like so:
protected void renderComponent(IMarkupWriter writer, IRequestCycle
cycle) {
if (getSource().getRowCount() == 0) {
throw new PageRedirectException("Search");
}
super.renderComponent(writer, cycle);
}
This seems to work when redirecting to a different page. However, I want to
redirect to the same page because the search form and the table of results are
simply two views of the same page, shown or hidden by If components as needed.
And when I am trying to redirect to the same page, again, PageRedirectException
is not caught but propagated, and the application crashes.
Does anybody know, why PageRedirectException is sometimes caught but at other
times propagated and what to do about this? Or maybe you can see a different
solution for my problem?
Thanks,
Alex
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[T4] PageRedirectException
I am using contrib:Table to display the results of a search. If a search
returns zero results, I want to treat this as an error and to show the
search form again with this error in the same way as if it was a faulty
user input validation.
It seems to me that a good solution to throw a PageRedirectException at
the moment when the Table component receives a source with 0 records in
it. I have tried to do this in the method that provides the model for
the page, like so:
public IBasicTableModel getModel() {
// some code to prepare the model
if (model.getRowCount() == 0) {
throw new PageRedirectException("Search");
}
return model;
}
But in this case the PageRedirectException was not caught by Tapestry
but propagated.
Another attempt was to override the renderComponent() method of the
Table component, like so:
protected void renderComponent(IMarkupWriter writer, IRequestCycle
cycle) {
if (getSource().getRowCount() == 0) {
throw new PageRedirectException("Search");
}
super.renderComponent(writer, cycle);
}
This seems to work when redirecting to a different page. However, I want
to redirect to the same page because the search form and the table of
results are simply two views of the same page, shown or hidden by If
components as needed. And when I am trying to redirect to the same page,
again, PageRedirectException is not caught but propagated, and the
application crashes.
Does anybody know, why PageRedirectException is sometimes caught but at
other times propagated and what to do about this? Or maybe you can see a
different solution for my problem?
Thanks,
Alex
--
CONFIDENTIALITY NOTICE: If you have received this email in error, please
immediately notify the sender by e-mail at the address shown. This email
transmission may contain confidential information. This information is
intended only for the use of the individual(s) or entity to whom it is intended
even if addressed incorrectly. Please delete it from your files if you are not
the intended recipient. Thank you for your compliance. Copyright 2007 CIGNA
==
