Home » Eclipse Projects » Remote Application Platform (RAP) » Remember Data on page reload
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| Re: Remember Data on page reload [message #137872 is a reply to message #137857] |
Thu, 25 June 2009 12:04   |
Eclipse User |
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Originally posted by: benjamin.wolff.web.de
take a look at RWT.getSettingStore() and ISettingStore doc?! afaik this mechanism works with cookies, maybe this is a point for further investigations?!
HTH,
-ben
Tom Schindl schrieb:
> Hi,
>
> How do I remember informations when the user reloads the page in the
> browser.
>
> Say I open my application with an URL like this:
> -------8<-------
> http://127.0.0.1:55350/rap?startup=bizerbawb&username=bl abla&password=bloblo
> -------8<-------
>
> In reality these 2 parameters are passed as post parameters :-) Now my
> user wants to switch the language which I implemented by simply
> reloading the page and like this:
>
> -------8<-------
> parent.window.location.href=' http://127.0.0.1:55350/rap?startup=bizerbawb&language=de _DE'
> -------8<-------
>
> Naturally I can't pass the username and password now because of security
> reasons. In standard web-applications I'd restore those informations in
> the HttpSession and that's what I thought would be possible also.
>
> So I tried:
> - RWT.getSession()
> - RWT.getSessionStore()
> - RWT.getRequest().getSession()
>
> but it looks like those sessions are clear when ever I reload the page.
>
> So I'm a bit stuck now because my standard Servlet-Knowlege doesn't seem
> to work.
>
> Tom
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| Re: Remember Data on page reload [message #137904 is a reply to message #137883] |
Thu, 25 June 2009 12:49 |
| Eclipse User |
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Originally posted by: benjamin.wolff.web.de
hm, that's odd, since i'm using this mechanism to store login information throughout session.
for example, when logging in i do:
RWT.getSettingStore().setAttribute("username", "bla");
RWT.getSettingStore().setAttribute("password", "blabla");
in a new session i do:
String username = (String) RWT.getSettingStore().getAttribute("username");
String password = (String) RWT.getSettingStore().getAttribute("password");
and then i get the values that have been stored in a previous session.
please distiguish between the RWT.getSETTINGStore() and RWT.getSESSIONStore()...
HTH,
-ben
Tom Schindl schrieb:
> Hi,
>
> I tried it already and it is cleared when I reload the page!
>
> Tom
>
> Ben W. schrieb:
>> take a look at RWT.getSettingStore() and ISettingStore doc?! afaik this
>> mechanism works with cookies, maybe this is a point for further
>> investigations?!
>>
>> HTH,
>> -ben
>>
>>
>>
>> Tom Schindl schrieb:
>>> Hi,
>>>
>>> How do I remember informations when the user reloads the page in the
>>> browser.
>>>
>>> Say I open my application with an URL like this:
>>> -------8<-------
>>> http://127.0.0.1:55350/rap?startup=bizerbawb&username=bl abla&password=bloblo
>>>
>>> -------8<-------
>>>
>>> In reality these 2 parameters are passed as post parameters :-) Now my
>>> user wants to switch the language which I implemented by simply
>>> reloading the page and like this:
>>>
>>> -------8<-------
>>> parent.window.location.href=' http://127.0.0.1:55350/rap?startup=bizerbawb&language=de _DE'
>>>
>>> -------8<-------
>>>
>>> Naturally I can't pass the username and password now because of security
>>> reasons. In standard web-applications I'd restore those informations in
>>> the HttpSession and that's what I thought would be possible also.
>>>
>>> So I tried:
>>> - RWT.getSession()
>>> - RWT.getSessionStore()
>>> - RWT.getRequest().getSession()
>>>
>>> but it looks like those sessions are clear when ever I reload the page.
>>>
>>> So I'm a bit stuck now because my standard Servlet-Knowlege doesn't seem
>>> to work.
>>>
>>> Tom
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| Re: Remember Data on page reload [message #137916 is a reply to message #137904] |
Thu, 25 June 2009 13:24 |
 Thomas Schindl
Messages: 6651
Registered: July 2009 |
Senior Member |
|
|
Hi,
You are sooooo right - I had a typo and really used
RWT.getSESSIONStore() :-)
Tom
Ben W. schrieb:
> hm, that's odd, since i'm using this mechanism to store login
> information throughout session.
>
> for example, when logging in i do:
>
> RWT.getSettingStore().setAttribute("username", "bla");
> RWT.getSettingStore().setAttribute("password", "blabla");
>
>
> in a new session i do:
>
> String username = (String) RWT.getSettingStore().getAttribute("username");
> String password = (String) RWT.getSettingStore().getAttribute("password");
>
> and then i get the values that have been stored in a previous session.
>
>
> please distiguish between the RWT.getSETTINGStore() and
> RWT.getSESSIONStore()...
>
>
> HTH,
> -ben
>
>
>
>
> Tom Schindl schrieb:
>> Hi,
>>
>> I tried it already and it is cleared when I reload the page!
>>
>> Tom
>>
>> Ben W. schrieb:
>>> take a look at RWT.getSettingStore() and ISettingStore doc?! afaik this
>>> mechanism works with cookies, maybe this is a point for further
>>> investigations?!
>>>
>>> HTH,
>>> -ben
>>>
>>>
>>>
>>> Tom Schindl schrieb:
>>>> Hi,
>>>>
>>>> How do I remember informations when the user reloads the page in the
>>>> browser.
>>>>
>>>> Say I open my application with an URL like this:
>>>> -------8<-------
>>>> http://127.0.0.1:55350/rap?startup=bizerbawb&username=bl abla&password=bloblo
>>>>
>>>>
>>>> -------8<-------
>>>>
>>>> In reality these 2 parameters are passed as post parameters :-) Now my
>>>> user wants to switch the language which I implemented by simply
>>>> reloading the page and like this:
>>>>
>>>> -------8<-------
>>>> parent.window.location.href=' http://127.0.0.1:55350/rap?startup=bizerbawb&language=de _DE'
>>>>
>>>>
>>>> -------8<-------
>>>>
>>>> Naturally I can't pass the username and password now because of
>>>> security
>>>> reasons. In standard web-applications I'd restore those informations in
>>>> the HttpSession and that's what I thought would be possible also.
>>>>
>>>> So I tried:
>>>> - RWT.getSession()
>>>> - RWT.getSessionStore()
>>>> - RWT.getRequest().getSession()
>>>>
>>>> but it looks like those sessions are clear when ever I reload the page.
>>>>
>>>> So I'm a bit stuck now because my standard Servlet-Knowlege doesn't
>>>> seem
>>>> to work.
>>>>
>>>> Tom
|
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| Re: Remember Data on page reload [message #137950 is a reply to message #137916] |
Thu, 25 June 2009 13:28 |
Thomas Schindl
Messages: 6651
Registered: July 2009 |
Senior Member |
|
|
Hi,
On a site note I think the approach from Rüdiger to use a static mao is
better because the setting store survives sessions (e.g. Browser
restart) which is a bad thing to happen!
Tom
Tom Schindl schrieb:
> Hi,
>
> You are sooooo right - I had a typo and really used
> RWT.getSESSIONStore() :-)
>
> Tom
>
> Ben W. schrieb:
>> hm, that's odd, since i'm using this mechanism to store login
>> information throughout session.
>>
>> for example, when logging in i do:
>>
>> RWT.getSettingStore().setAttribute("username", "bla");
>> RWT.getSettingStore().setAttribute("password", "blabla");
>>
>>
>> in a new session i do:
>>
>> String username = (String) RWT.getSettingStore().getAttribute("username");
>> String password = (String) RWT.getSettingStore().getAttribute("password");
>>
>> and then i get the values that have been stored in a previous session.
>>
>>
>> please distiguish between the RWT.getSETTINGStore() and
>> RWT.getSESSIONStore()...
>>
>>
>> HTH,
>> -ben
>>
>>
>>
>>
>> Tom Schindl schrieb:
>>> Hi,
>>>
>>> I tried it already and it is cleared when I reload the page!
>>>
>>> Tom
>>>
>>> Ben W. schrieb:
>>>> take a look at RWT.getSettingStore() and ISettingStore doc?! afaik this
>>>> mechanism works with cookies, maybe this is a point for further
>>>> investigations?!
>>>>
>>>> HTH,
>>>> -ben
>>>>
>>>>
>>>>
>>>> Tom Schindl schrieb:
>>>>> Hi,
>>>>>
>>>>> How do I remember informations when the user reloads the page in the
>>>>> browser.
>>>>>
>>>>> Say I open my application with an URL like this:
>>>>> -------8<-------
>>>>> http://127.0.0.1:55350/rap?startup=bizerbawb&username=bl abla&password=bloblo
>>>>>
>>>>>
>>>>> -------8<-------
>>>>>
>>>>> In reality these 2 parameters are passed as post parameters :-) Now my
>>>>> user wants to switch the language which I implemented by simply
>>>>> reloading the page and like this:
>>>>>
>>>>> -------8<-------
>>>>> parent.window.location.href=' http://127.0.0.1:55350/rap?startup=bizerbawb&language=de _DE'
>>>>>
>>>>>
>>>>> -------8<-------
>>>>>
>>>>> Naturally I can't pass the username and password now because of
>>>>> security
>>>>> reasons. In standard web-applications I'd restore those informations in
>>>>> the HttpSession and that's what I thought would be possible also.
>>>>>
>>>>> So I tried:
>>>>> - RWT.getSession()
>>>>> - RWT.getSessionStore()
>>>>> - RWT.getRequest().getSession()
>>>>>
>>>>> but it looks like those sessions are clear when ever I reload the page.
>>>>>
>>>>> So I'm a bit stuck now because my standard Servlet-Knowlege doesn't
>>>>> seem
>>>>> to work.
>>>>>
>>>>> Tom
|
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| | |
| Re: Remember Data on page reload [message #137990 is a reply to message #137974] |
Thu, 25 June 2009 14:26 |
| Eclipse User |
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|
|
Originally posted by: benjamin.wolff.web.de
hi,
using servlets in conjunction with a RAP/server-side equinox application is as easy as can possibly be imagined :PP.
just use the org.eclipse.equinox.http.registry.servlets extension point and point to the servlet class and fill in the other parameters.
you can then use the servlets in an embedded jetty or deployed in a tomcat environmen.
HTH,
-ben
Tom Schindl schrieb:
> Hi Rüdiger,
>
> Works like a charme but I'm not sure how I should add a session listener
> in context of an RAP-Application.
>
> Do you by chance have a pointer how I do that in an RAP-env? I also have
> to register 2 more servlets in the Jetty (to produce PDF and CSV-Files).
>
> So the general question might be how to configure the underlying
> Jetty-Instance through extension points.
>
> Tom
>
> Rüdiger Herrmann schrieb:
>> Tom,
>>
>> currently all session attributes are removed from the HttpSession. The
>> ISessionStore is itself an attribute taht is stored in the HttpSesion.
>> If you feel that it is a general requirement to have sme attributes
>> "survive" a session restart, please file an enhancement request.
>>
>> Meanwhile you could work around this by storing the user information in
>> a static map. As a key you can use the session id (it doesn't change
>> with a session restart).
>> The first login would store user/password in the map under the session
>> id. A "restart-request" would encounter that there is no user/password
>> in the request parameters and consult the map.
>> To save memory, remove the entry from the map when the session is
>> invalidated.
>>
>> Another approach would be form based authentication. It should also
>> work, thou I haven't tried it myself.
>>
>> HTH
>> Rüdiger
>>
>>
>> Tom Schindl wrote:
>>> Hi,
>>>
>>> How do I remember informations when the user reloads the page in the
>>> browser.
>>>
>>> Say I open my application with an URL like this:
>>> -------8<-------
>>> http://127.0.0.1:55350/rap?startup=bizerbawb&username=bl abla&password=bloblo
>>>
>>> -------8<-------
>>>
>>> In reality these 2 parameters are passed as post parameters :-) Now my
>>> user wants to switch the language which I implemented by simply
>>> reloading the page and like this:
>>>
>>> -------8<-------
>>> parent.window.location.href=' http://127.0.0.1:55350/rap?startup=bizerbawb&language=de _DE'
>>>
>>> -------8<-------
>>>
>>> Naturally I can't pass the username and password now because of security
>>> reasons. In standard web-applications I'd restore those informations in
>>> the HttpSession and that's what I thought would be possible also.
>>>
>>> So I tried:
>>> - RWT.getSession()
>>> - RWT.getSessionStore()
>>> - RWT.getRequest().getSession()
>>>
>>> but it looks like those sessions are clear when ever I reload the page.
>>>
>>> So I'm a bit stuck now because my standard Servlet-Knowlege doesn't seem
>>> to work.
>>>
>>> Tom
|
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| |
| Re: Remember Data on page reload [message #138134 is a reply to message #137990] |
Fri, 26 June 2009 10:40 |
Thomas Schindl
Messages: 6651
Registered: July 2009 |
Senior Member |
|
|
Hi,
This works great. Now one final question and I'm totally happy. Do you
know if it possible to somehow modify the main-html page so that I can
add a hidden IFRAME where I redirect file downloads to?
Tom
Ben W. schrieb:
> hi,
>
> using servlets in conjunction with a RAP/server-side equinox application
> is as easy as can possibly be imagined :PP.
> just use the org.eclipse.equinox.http.registry.servlets extension point
> and point to the servlet class and fill in the other parameters.
> you can then use the servlets in an embedded jetty or deployed in a
> tomcat environmen.
>
>
> HTH,
> -ben
>
>
>
> Tom Schindl schrieb:
>> Hi Rüdiger,
>>
>> Works like a charme but I'm not sure how I should add a session listener
>> in context of an RAP-Application.
>>
>> Do you by chance have a pointer how I do that in an RAP-env? I also have
>> to register 2 more servlets in the Jetty (to produce PDF and CSV-Files).
>>
>> So the general question might be how to configure the underlying
>> Jetty-Instance through extension points.
>>
>> Tom
>>
>> Rüdiger Herrmann schrieb:
>>> Tom,
>>>
>>> currently all session attributes are removed from the HttpSession. The
>>> ISessionStore is itself an attribute taht is stored in the HttpSesion.
>>> If you feel that it is a general requirement to have sme attributes
>>> "survive" a session restart, please file an enhancement request.
>>>
>>> Meanwhile you could work around this by storing the user information in
>>> a static map. As a key you can use the session id (it doesn't change
>>> with a session restart).
>>> The first login would store user/password in the map under the session
>>> id. A "restart-request" would encounter that there is no user/password
>>> in the request parameters and consult the map.
>>> To save memory, remove the entry from the map when the session is
>>> invalidated.
>>>
>>> Another approach would be form based authentication. It should also
>>> work, thou I haven't tried it myself.
>>>
>>> HTH
>>> Rüdiger
>>>
>>>
>>> Tom Schindl wrote:
>>>> Hi,
>>>>
>>>> How do I remember informations when the user reloads the page in the
>>>> browser.
>>>>
>>>> Say I open my application with an URL like this:
>>>> -------8<-------
>>>> http://127.0.0.1:55350/rap?startup=bizerbawb&username=bl abla&password=bloblo
>>>>
>>>>
>>>> -------8<-------
>>>>
>>>> In reality these 2 parameters are passed as post parameters :-) Now my
>>>> user wants to switch the language which I implemented by simply
>>>> reloading the page and like this:
>>>>
>>>> -------8<-------
>>>> parent.window.location.href=' http://127.0.0.1:55350/rap?startup=bizerbawb&language=de _DE'
>>>>
>>>>
>>>> -------8<-------
>>>>
>>>> Naturally I can't pass the username and password now because of
>>>> security
>>>> reasons. In standard web-applications I'd restore those informations in
>>>> the HttpSession and that's what I thought would be possible also.
>>>>
>>>> So I tried:
>>>> - RWT.getSession()
>>>> - RWT.getSessionStore()
>>>> - RWT.getRequest().getSession()
>>>>
>>>> but it looks like those sessions are clear when ever I reload the page.
>>>>
>>>> So I'm a bit stuck now because my standard Servlet-Knowlege doesn't
>>>> seem
>>>> to work.
>>>>
>>>> Tom
|
|
|
| Re: Remember Data on page reload [message #138158 is a reply to message #138134] |
Fri, 26 June 2009 11:22 |
Rüdiger Herrmann
Messages: 581
Registered: July 2009 |
Senior Member |
|
|
Tom Schindl wrote:
> Hi,
>
> This works great. Now one final question and I'm totally happy. Do you
> know if it possible to somehow modify the main-html page so that I can
> add a hidden IFRAME where I redirect file downloads to?
You would need a "branding" that - among other things - allows you
to insert HTML snippets into the main page.
See here for the branding documentation:
http://help.eclipse.org/galileo/index.jsp?topic=/org.eclipse .rap.help/help/html/advanced/branding.html
The documentation of the body attribute might be a bit misleading.
You need to specify a file that contains an HTML snippets that goes
into the body element of the page.
>
> Tom
>
> Ben W. schrieb:
>> hi,
>>
>> using servlets in conjunction with a RAP/server-side equinox application
>> is as easy as can possibly be imagined :PP.
>> just use the org.eclipse.equinox.http.registry.servlets extension point
>> and point to the servlet class and fill in the other parameters.
>> you can then use the servlets in an embedded jetty or deployed in a
>> tomcat environmen.
>>
>>
>> HTH,
>> -ben
>>
>>
>>
>> Tom Schindl schrieb:
>>> Hi Rüdiger,
>>>
>>> Works like a charme but I'm not sure how I should add a session listener
>>> in context of an RAP-Application.
>>>
>>> Do you by chance have a pointer how I do that in an RAP-env? I also have
>>> to register 2 more servlets in the Jetty (to produce PDF and CSV-Files).
>>>
>>> So the general question might be how to configure the underlying
>>> Jetty-Instance through extension points.
>>>
>>> Tom
>>>
>>> Rüdiger Herrmann schrieb:
>>>> Tom,
>>>>
>>>> currently all session attributes are removed from the HttpSession. The
>>>> ISessionStore is itself an attribute taht is stored in the HttpSesion.
>>>> If you feel that it is a general requirement to have sme attributes
>>>> "survive" a session restart, please file an enhancement request.
>>>>
>>>> Meanwhile you could work around this by storing the user information in
>>>> a static map. As a key you can use the session id (it doesn't change
>>>> with a session restart).
>>>> The first login would store user/password in the map under the session
>>>> id. A "restart-request" would encounter that there is no user/password
>>>> in the request parameters and consult the map.
>>>> To save memory, remove the entry from the map when the session is
>>>> invalidated.
>>>>
>>>> Another approach would be form based authentication. It should also
>>>> work, thou I haven't tried it myself.
>>>>
>>>> HTH
>>>> Rüdiger
>>>>
>>>>
>>>> Tom Schindl wrote:
>>>>> Hi,
>>>>>
>>>>> How do I remember informations when the user reloads the page in the
>>>>> browser.
>>>>>
>>>>> Say I open my application with an URL like this:
>>>>> -------8<-------
>>>>> http://127.0.0.1:55350/rap?startup=bizerbawb&username=bl abla&password=bloblo
>>>>>
>>>>>
>>>>> -------8<-------
>>>>>
>>>>> In reality these 2 parameters are passed as post parameters :-) Now my
>>>>> user wants to switch the language which I implemented by simply
>>>>> reloading the page and like this:
>>>>>
>>>>> -------8<-------
>>>>> parent.window.location.href=' http://127.0.0.1:55350/rap?startup=bizerbawb&language=de _DE'
>>>>>
>>>>>
>>>>> -------8<-------
>>>>>
>>>>> Naturally I can't pass the username and password now because of
>>>>> security
>>>>> reasons. In standard web-applications I'd restore those informations in
>>>>> the HttpSession and that's what I thought would be possible also.
>>>>>
>>>>> So I tried:
>>>>> - RWT.getSession()
>>>>> - RWT.getSessionStore()
>>>>> - RWT.getRequest().getSession()
>>>>>
>>>>> but it looks like those sessions are clear when ever I reload the page.
>>>>>
>>>>> So I'm a bit stuck now because my standard Servlet-Knowlege doesn't
>>>>> seem
>>>>> to work.
>>>>>
>>>>> Tom
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