Re: [Springframework-developer] Spring Webflow PR3 and Redirects

[Erwin V. <erw...@er...>]

This is caused because of the ViewResolver(s) you have registered with the 
DispatcherServlet. You don't seem to be using a UrlBasedViewResolver (e.g. 
InternalResourceViewResolver), which picks up on the redirect.

Here's what's happening: I assume the value of the *service* string is 
"https:/<machinename>:8443/contacts-cas/j_acegi_cas_security_check". Since 
you are setting the redirect property of the view descriptor to true, the 
FlowController.toModelAndView() method will actually create a ModelAndView 
object with as a view name 
"redirect:https:/<machinename>:8443/contacts-cas/j_acegi_cas_security_check". 
This ModelAndView is passed back up to the DispatcherServlet which tries to 
resolve it using a ViewResolver, as usual in Spring MVC. If you have a 
UrlBasedViewResolver, it will recognize the "redirect:" prefix and construct 
an appropriate RedirectView to redirect to the specified URL.

Erwin Vervaet
erw...@er...
----- Original Message ----- 
From: "Scott Battaglia" <sco...@ru...>
To: <spr...@li...>
Sent: Monday, May 23, 2005 7:43 PM
Subject: Re: [Springframework-developer] Spring Webflow PR3 and Redirects


> Erwin,
>
> Thanks for the response.
>
> One more question for you: is it possible to redirect to a specific url 
> (rather than a view).  I tried creating a custom view descriptor creator 
> that did the following:
>
> public class RedirectViewDescriptorCreator implements 
> ViewDescriptorCreator {
>
>    public ViewDescriptor createViewDescriptor(RequestContext 
> requestContext) {
>        final String service = (String) 
> ContextUtils.getAttributeFromFlowScope(requestContext, 
> WebConstants.SERVICE);
>        final String ticket = (String) 
> ContextUtils.getAttributeFromFlowScope(requestContext, 
> WebConstants.TICKET);
>        final Map model = new HashMap();
>       model.put(WebConstants.TICKET, ticket);
>       ViewDescriptor descriptor = new ViewDescriptor(service, model);
>        descriptor.setRedirect(true);
>       return descriptor;
>    }
> }
>
> However, I get a an error message: javax.servlet.ServletException: Could 
> not resolve view with name 
> 'redirect:https:/<machinename>:8443/contacts-cas/j_acegi_cas_security_check' 
> in servlet with name 'cas'
>
> Is there a proper way to handle redirects to URLs using Webflow?
>
> Thanks
> -Scott
>
> Erwin Vervaet wrote:
>
>> Yes, that's a limitation of the current RedirectViewDescriptorCreator: it 
>> only evaluates expressions in the values of request attributes. That will 
>> certainly be made more generic with the next release.
>>
>> For now you could do something like this:
>>
>> <end-state id="redirect" 
>> view="class:com.my.CustomViewDescriptorCreator"/>
>>
>> and just implement a CustomViewDescriptorCreator for your case.
>>
>> Erwin Vervaet
>> erw...@er...
>> ----- Original Message ----- From: "Scott Battaglia" 
>> <sco...@ru...>
>> To: <spr...@li...>
>> Sent: Monday, May 23, 2005 4:41 PM
>> Subject: [Springframework-developer] Spring Webflow PR3 and Redirects
>>
>>
>>> I've just started using PR3 of Webflow (nice stuff!!) and I'm trying to 
>>> get the redirect views to work.
>>>
>>> It seems to be choking though on the following entry:
>>> <end-state id="redirect" 
>>> view="redirect:${flowScope.service}?ticket=${flowScope.ticket}"/>
>>>
>>> Is the above a valid statement?  It seems to not be evaluating the 
>>> flowScope.service.
>>>
>>> This is the error I get:
>>> javax.servlet.ServletException: Could not resolve view with name 
>>> 'redirect:${flowScope.service}' in servlet with name 'cas'
>>>
>>> Thanks
>>> -Scott
>>>
>>> -- 
>>> Scott Battaglia
>>> Application Developer, Architecture & Engineering Team
>>> Enterprise Systems and Services, Rutgers University
>>> v: 732.445.0097 | f: 732.445.5493 | sco...@ru...
>>>
>>>
>>>
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>>
>>
>>
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