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Jim Morris

2006-Mar-24 20:43 UTC

[Rails] login forms , redirect_to and ajax-scaffold problems

Hi,

I have a standard type authentication technique direct from  AWDWR, so there is
a

 before_filter :authorize_employee, :except => :login in my
employees_controller.rb

the authorize_employee is in application.rb

     def authorize_employee
        unless session[:employee_id]
            flash[:notice] = "Please log in"
            # save the URL the user requested so we can hop back to it
            # after login
            session[:jumpto] = request.parameters
            redirect_to(:controller => "employees", :action =>
"login")
        else
            logger.info "User already authorized as
#{session[:employee_id]}"
        end
    end

All standard stuff and works as expected most of the time.

Now the problem is that if the session expires and someone clicks on say the
Create New
link in the ajax-scaffold (of a page that was already sitting there from last
time), I
get the redirect_to :controller => ''employees'', :action
=> ''login'', but the resulting
form gets inserted into the existing page as if it were a response from an ajax
request,
but a redirect_to is not generating an ajax request and I expect a new page to
be
generated with the login form.

I have been playing with this for hours now, and cannot figure out how to get it
to put
up a fresh login screen.

Any ideas anyone?

Thanks

Emin Hasanov

2006-Mar-24 22:24 UTC

head link

[Rails] login forms , redirect_to and ajax-scaffold problems

very good question

I think the good option is to use built-in :failure attribute of
link_to_remote that can call redirect function in case of failure

now, it only triggers if the HTTP response is 3xx as oppossed to 2xx
for example you way want to do this instead of redirect_to

render_text '''', ''307 Temporary Redirect''

of course, you need to be sure to use this response only in case of ajax
request so that regular request is handled by standard redirect_to

hope this at least points to the right direction and you can get a working
code out of this

On 3/25/06, Jim Morris <morris@wolfman.com> wrote:>
> Hi,
>
> I have a standard type authentication technique direct from  AWDWR, so
> there is a
>
> before_filter :authorize_employee, :except => :login in my
> employees_controller.rb
>
> the authorize_employee is in application.rb
>
>      def authorize_employee
>         unless session[:employee_id]
>             flash[:notice] = "Please log in"
>             # save the URL the user requested so we can hop back to it
>             # after login
>             session[:jumpto] = request.parameters
>             redirect_to(:controller => "employees", :action
=> "login")
>         else
>             logger.info "User already authorized as
> #{session[:employee_id]}"
>         end
>     end
>
> All standard stuff and works as expected most of the time.
>
> Now the problem is that if the session expires and someone clicks on say
> the Create New
> link in the ajax-scaffold (of a page that was already sitting there from
> last time), I
> get the redirect_to :controller => ''employees'',
:action => ''login'', but
> the resulting
> form gets inserted into the existing page as if it were a response from an
> ajax request,
> but a redirect_to is not generating an ajax request and I expect a new
> page to be
> generated with the login form.
>
> I have been playing with this for hours now, and cannot figure out how to
> get it to put
> up a fresh login screen.
>
> Any ideas anyone?
>
> Thanks
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
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Emin Hasanov

2006-Mar-24 22:26 UTC

head link

[Rails] login forms , redirect_to and ajax-scaffold problems

sorry, this syntax is deprecated

should be like

 render :nothing => true, :status => 307

http://api.rubyonrails.com/classes/ActionController/Base.html#M000178

On 3/25/06, Emin Hasanov <emin@hasanov.com> wrote:>
> very good question
>
> I think the good option is to use built-in :failure attribute of
> link_to_remote that can call redirect function in case of failure
>
> now, it only triggers if the HTTP response is 3xx as oppossed to 2xx
> for example you way want to do this instead of redirect_to
>
> render_text '''', ''307 Temporary
Redirect''
>
> of course, you need to be sure to use this response only in case of ajax
> request so that regular request is handled by standard redirect_to
>
> hope this at least points to the right direction and you can get a working
> code out of this
>
>
> On 3/25/06, Jim Morris < morris@wolfman.com> wrote:
> >
> > Hi,
> >
> > I have a standard type authentication technique direct from  AWDWR, so
> > there is a
> >
> > before_filter :authorize_employee, :except => :login in my
> > employees_controller.rb
> >
> > the authorize_employee is in application.rb
> >
> >      def authorize_employee
> >         unless session[:employee_id]
> >             flash[:notice] = "Please log in"
> >             # save the URL the user requested so we can hop back to it
> >             # after login
> >             session[:jumpto] = request.parameters
> >             redirect_to(:controller => "employees",
:action => "login")
> >         else
> >             logger.info "User already authorized as
> > #{session[:employee_id]}"
> >         end
> >     end
> >
> > All standard stuff and works as expected most of the time.
> >
> > Now the problem is that if the session expires and someone clicks on
say
> > the Create New
> > link in the ajax-scaffold (of a page that was already sitting there
from
> > last time), I
> > get the redirect_to :controller => ''employees'',
:action => ''login'', but
> > the resulting
> > form gets inserted into the existing page as if it were a response
from
> > an ajax request,
> > but a redirect_to is not generating an ajax request and I expect a new
> > page to be
> > generated with the login form.
> >
> > I have been playing with this for hours now, and cannot figure out how
> > to get it to put
> > up a fresh login screen.
> >
> > Any ideas anyone?
> >
> > Thanks
> > _______________________________________________
> > Rails mailing list
> > Rails@lists.rubyonrails.org
> > http://lists.rubyonrails.org/mailman/listinfo/rails
> >
>
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Jim Morris

2006-Mar-24 23:31 UTC

head link

[Rails] login forms , redirect_to and ajax-scaffold problems

Thanks for the response,

I have tried playing with that, I am not sure if it is an ajax_scaffold
problem or not but I can''t get it to work, I even tried this...

  <%= link_to_remote "Create New",
           :url => { :controller => ''employees'', :action
=> ''new'' },
           302 => "document.location
request.getResponseHeader(''location'')",
           :loading =>
"AjaxScaffold.newOnLoading(request,''employee'');",
       :success =>
"AjaxScaffold.newOnSuccess(request,''employee'');",
       :failure =>
"AjaxScaffold.newOnFailure(request,''employee'');",
       :href => url_for(:controller => ''employees'',
:action => ''new''),
       :class => "create" %>
             
Notice the 302 => this is meant to force a redirect, but I always get
the same thing, the login page gets rendered into the existing page.

Maybe I should ask, how do I force a page refresh when an outstanding
ajax call fails? or gets redirected?

Emin Hasanov wrote:> sorry, this syntax is deprecated
>
> should be like
>  render :nothing => true, :status => 307
> http://api.rubyonrails.com/classes/ActionController/Base.html#M000178
>
<http://api.rubyonrails.com/classes/ActionController/Base.html#M000178>
>
> On 3/25/06, *Emin Hasanov* <emin@hasanov.com
> <mailto:emin@hasanov.com>> wrote:
>
>     very good question
>
>     I think the good option is to use built-in :failure attribute of
>     link_to_remote that can call redirect function in case of failure
>
>     now, it only triggers if the HTTP response is 3xx as oppossed to 2xx
>     for example you way want to do this instead of redirect_to
>
>     |render_text '''', ''307 Temporary
Redirect''
>     |
>
>     of course, you need to be sure to use this response only in case
>     of ajax request so that regular request is handled by standard
>     redirect_to
>
>     hope this at least points to the right direction and you can get a
>     working code out of this
>
>
>     On 3/25/06, *Jim Morris* < morris@wolfman.com
>     <mailto:morris@wolfman.com>> wrote:
>
>         Hi,
>
>         I have a standard type authentication technique direct
>         from  AWDWR, so there is a
>
>         before_filter :authorize_employee, :except => :login in my
>         employees_controller.rb
>
>         the authorize_employee is in application.rb
>
>              def authorize_employee
>                 unless session[:employee_id]
>                     flash[:notice] = "Please log in"
>                     # save the URL the user requested so we can hop
>         back to it
>                     # after login
>                     session[:jumpto] = request.parameters
>                     redirect_to(:controller => "employees",
:action =>
>         "login")
>                 else
>                     logger.info <http://logger.info> "User
already
>         authorized as #{session[:employee_id]}"
>                 end
>             end
>
>         All standard stuff and works as expected most of the time.
>
>         Now the problem is that if the session expires and someone
>         clicks on say the Create New
>         link in the ajax-scaffold (of a page that was already sitting
>         there from last time), I
>         get the redirect_to :controller =>
''employees'', :action =>
>         ''login'', but the resulting
>         form gets inserted into the existing page as if it were a
>         response from an ajax request,
>         but a redirect_to is not generating an ajax request and I
>         expect a new page to be
>         generated with the login form.
>
>         I have been playing with this for hours now, and cannot figure
>         out how to get it to put
>         up a fresh login screen.
>
>         Any ideas anyone?
>
>         Thanks
>         _______________________________________________
>         Rails mailing list
>         Rails@lists.rubyonrails.org
<mailto:Rails@lists.rubyonrails.org>
>         http://lists.rubyonrails.org/mailman/listinfo/rails
>
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

Jim Morris

2006-Mar-25 06:44 UTC

head link

[Rails] login forms , redirect_to and ajax-scaffold problems

Ok I finally got it thanks...

For anyone else reading this I had to put this in my controller..
 

   render :layout => false, :status => 302 if request.xhr?


and this in my link_to_remote in the rhtml...

|*	   302 => "document.location =
''/employees/login''",

as in
*|

|*  <%= link_to_remote "Create New",
	   { :url => { :controller => ''employees'', :action
=> ''new'' },
	   302 => "document.location =
''/employees/login''",
           :loading =>
"AjaxScaffold.newOnLoading(request,''employee'');",
	   :success =>
"AjaxScaffold.newOnSuccess(request,''employee'');",
	   :failure =>
"AjaxScaffold.newOnFailure(request,''employee'');" },
	   { :href => url_for(:controller => ''employees'',
:action => ''new''),
	   :class => "create" }%> 
*|

I had to hard code the redirection, it would be nice to be able to use
redirect_to, but that simply doesn''t work and doesn''t return a
response
code of 302 to the ajax handlers.

Emin Hasanov wrote:> very good question
>
> I think the good option is to use built-in :failure attribute of
> link_to_remote that can call redirect function in case of failure
>
> now, it only triggers if the HTTP response is 3xx as oppossed to 2xx
> for example you way want to do this instead of redirect_to
> |render_text '''', ''307 Temporary
Redirect''
> |
> of course, you need to be sure to use this response only in case of
> ajax request so that regular request is handled by standard redirect_to
>
> hope this at least points to the right direction and you can get a
> working code out of this
>
> On 3/25/06, *Jim Morris* < morris@wolfman.com
> <mailto:morris@wolfman.com>> wrote:
>
>     Hi,
>
>     I have a standard type authentication technique direct
>     from  AWDWR, so there is a
>
>     before_filter :authorize_employee, :except => :login in my
>     employees_controller.rb
>
>     the authorize_employee is in application.rb
>
>          def authorize_employee
>             unless session[:employee_id]
>                 flash[:notice] = "Please log in"
>                 # save the URL the user requested so we can hop back to it
>                 # after login
>                 session[:jumpto] = request.parameters
>                 redirect_to(:controller => "employees",
:action =>
>     "login")
>             else
>                 logger.info <http://logger.info> "User already
>     authorized as #{session[:employee_id]}"
>             end
>         end
>
>     All standard stuff and works as expected most of the time.
>
>     Now the problem is that if the session expires and someone clicks
>     on say the Create New
>     link in the ajax-scaffold (of a page that was already sitting
>     there from last time), I
>     get the redirect_to :controller => ''employees'',
:action =>
>     ''login'', but the resulting
>     form gets inserted into the existing page as if it were a response
>     from an ajax request,
>     but a redirect_to is not generating an ajax request and I expect a
>     new page to be
>     generated with the login form.
>
>     I have been playing with this for hours now, and cannot figure out
>     how to get it to put
>     up a fresh login screen.
>
>     Any ideas anyone?
>
>     Thanks
>     _______________________________________________
>     Rails mailing list
>     Rails@lists.rubyonrails.org <mailto:Rails@lists.rubyonrails.org>
>     http://lists.rubyonrails.org/mailman/listinfo/rails
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

Emin Hasanov

2006-Mar-25 07:18 UTC

head link

[Rails] login forms , redirect_to and ajax-scaffold problems

Good to hear it works - it is easier to simplify now :-)

Did not try it, but I guess this should work too

<%= link_to_remote "Create New",
           { :url => { :controller => ''employees'',
:action => ''new'' },
           :loading =>
"AjaxScaffold.newOnLoading(request,''employee'');",
           :success =>
"AjaxScaffold.newOnSuccess(request,''employee'');",
           :failure => "document.location =
''/employees/login''" },
           { :href => url_for(:controller =>
''employees'', :action => ''new''),
           :class => "create" }%>

You don''t need to hardcode 302 in view as any 3xx is failure.
By the way, I have just re-checked docs and see that redirect_to also
generates 302 header, so you may want to simply try adding :failure
attribute to the link and see if it works with no changes to controller...

On 3/25/06, Jim Morris <morris@wolfman.com> wrote:>
> Ok I finally got it thanks...
>
> For anyone else reading this I had to put this in my controller..
>
>
>    render :layout => false, :status => 302 if request.xhr?
>
>
> and this in my link_to_remote in the rhtml...
>
> |*         302 => "document.location =
''/employees/login''",
>
> as in
> *|
>
> |*  <%= link_to_remote "Create New",
>            { :url => { :controller => ''employees'',
:action => ''new'' },
>            302 => "document.location =
''/employees/login''",
>            :loading =>
"AjaxScaffold.newOnLoading(request,''employee'');",
>            :success =>
"AjaxScaffold.newOnSuccess(request,''employee'');",
>            :failure =>
"AjaxScaffold.newOnFailure(request,''employee'');" },
>            { :href => url_for(:controller =>
''employees'', :action =>
> ''new''),
>            :class => "create" }%>
> *|
>
> I had to hard code the redirection, it would be nice to be able to use
> redirect_to, but that simply doesn''t work and doesn''t
return a response
> code of 302 to the ajax handlers.
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Jim Morris

2006-Mar-25 20:55 UTC

head link

[Rails] login forms , redirect_to and ajax-scaffold problems

Thanks,

I did try redirect_to, however for some reason the ajax callback does
not see it as an error or a redirect but as success, I tried many
different things and the one that worked was the render :layout =>
false, :status => 302 if request.xhr?. This could be a bug in the ajax
stuff I guess.

In my case I need to distinguish between failures (>=500) and redirects
as the ajax scaffold uses errors >= 500 for error messages, and using
redirect allows me to catch the login failure specifically.

Emin Hasanov wrote:> Good to hear it works - it is easier to simplify now :-)
>
> Did not try it, but I guess this should work too
>
> <%= link_to_remote "Create New",
>            { :url => { :controller => ''employees'',
:action => ''new'' },
>            :loading =>
"AjaxScaffold.newOnLoading(request,''employee'');",
>            :success =>
"AjaxScaffold.newOnSuccess(request,''employee'');",
>            :failure => "document.location =
''/employees/login''" },
>            { :href => url_for(:controller =>
''employees'', :action =>
> ''new''),
>            :class => "create" }%>
>
> You don''t need to hardcode 302 in view as any 3xx is failure.
> By the way, I have just re-checked docs and see that redirect_to also
> generates 302 header, so you may want to simply try adding :failure
> attribute to the link and see if it works with no changes to controller...
>
> On 3/25/06, *Jim Morris* <morris@wolfman.com
> <mailto:morris@wolfman.com>> wrote:
>
>     Ok I finally got it thanks...
>
>     For anyone else reading this I had to put this in my controller..
>
>
>        render :layout => false, :status => 302 if request.xhr?
>
>
>     and this in my link_to_remote in the rhtml...
>
>     |*         302 => "document.location =
''/employees/login''",
>
>     as in
>     *|
>
>     |*  <%= link_to_remote "Create New",
>                { :url => { :controller =>
''employees'', :action =>
>     ''new'' },
>                302 => "document.location =
''/employees/login''",
>                :loading =>
>    
"AjaxScaffold.newOnLoading(request,''employee'');",
>                :success => "AjaxScaffold.newOnSuccess
>     (request,''employee'');",
>                :failure =>
>    
"AjaxScaffold.newOnFailure(request,''employee'');" },
>                { :href => url_for(:controller =>
''employees'', :action
>     => ''new''),
>                :class => "create" }%>
>     *|
>
>     I had to hard code the redirection, it would be nice to be able to use
>     redirect_to, but that simply doesn''t work and doesn''t
return a
>     response
>     code of 302 to the ajax handlers.
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

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