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Posted to users@tapestry.apache.org by Peer Brink <pe...@gmail.com> on 2008/08/05 11:40:37 UTC
Transmitting a javascript-value to the server using JSON
Hello,
I try to transmit the users/browsers timezone-offset to the server.
The timeZone-offset can easily be retrieved by
<script type="text/javascript">
var offset = new Date().getTimezoneOffset();
</script>
But how can it be transmitted? Could this be done using a JSONObject
by adding "Object.toJSON(offset);"?
I found quite some conversations in the mailing-list about
JSON-communication but they are all about transmitting data in the
other direction (server to client).
Where would the code go in the html-source and what java-code is
needed to receive the value on the server-side?
Or is there a complete other way to get this value?
Sorry for this rookie-question. But I am not too familiar with
java-script and JSON.
Thanks for any help,
Peer.
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Re: Transmitting a javascript-value to the server using JSON
Posted by Kalle Korhonen <ka...@gmail.com>.
Well well, looks like Chenillekit's OnEvent is pretty close to what I want.
I think you still got to make your Javascript thing a component though, but
otherwise it functions similarly to T4's EventListener.
Kalle
On Sat, Jan 17, 2009 at 9:46 AM, Kalle Korhonen
<ka...@gmail.com>wrote:
> On Sat, Jan 17, 2009 at 6:55 AM, Thiago H. de Paula Figueiredo <
> thiagohp@gmail.com> wrote:
>
>> Em Sat, 17 Jan 2009 01:56:08 -0300, Kalle Korhonen <
>> kalle.o.korhonen@gmail.com> escreveu:
>>
>>> ActionLink with zone and @OnEvent on the server, but what I loved about
>>> T4's EventListener was that you could hook an arbitrary Javascript call to a
>>> server side operation with one annotation. I have a case where I'd like
>>> to do communicate in the background from plain Javascript rather than "click
>>> a link".
>>>
>> What's the closest equivalent of T4's EventListener in T5? You can do
>>
>> Have you tried to generate the link though LinkFactory and use it in your
>> Javascript code?
>>
>
> Yes, that'd be a bit better though still not quite the same as the
> EventListener. But at least I can stick that link directly into my
> Javascript that way I think, thanks.
>
> Kalle
>
Re: Transmitting a javascript-value to the server using JSON
Posted by Kalle Korhonen <ka...@gmail.com>.
On Sat, Jan 17, 2009 at 6:55 AM, Thiago H. de Paula Figueiredo <
thiagohp@gmail.com> wrote:
> Em Sat, 17 Jan 2009 01:56:08 -0300, Kalle Korhonen <
> kalle.o.korhonen@gmail.com> escreveu:
>>
>> ActionLink with zone and @OnEvent on the server, but what I loved about
>> T4's EventListener was that you could hook an arbitrary Javascript call to a
>> server side operation with one annotation. I have a case where I'd like to
>> do communicate in the background from plain Javascript rather than "click a
>> link".
>>
> What's the closest equivalent of T4's EventListener in T5? You can do
>
> Have you tried to generate the link though LinkFactory and use it in your
> Javascript code?
>
Yes, that'd be a bit better though still not quite the same as the
EventListener. But at least I can stick that link directly into my
Javascript that way I think, thanks.
Kalle
Re: Transmitting a javascript-value to the server using JSON
Posted by "Thiago H. de Paula Figueiredo" <th...@gmail.com>.
Em Sat, 17 Jan 2009 01:56:08 -0300, Kalle Korhonen
<ka...@gmail.com> escreveu:
> What's the closest equivalent of T4's EventListener in T5? You can do
> ActionLink with zone and @OnEvent on the server, but what I loved about
> T4's EventListener was that you could hook an arbitrary Javascript call
> to a
> server side operation with one annotation. I have a case where I'd like
> to do communicate in the background from plain Javascript rather than
> "click a link".
Have you tried to generate the link though LinkFactory and use it in your
Javascript code?
--
Thiago H. de Paula Figueiredo
Independent Java consultant, developer, and instructor
http://www.arsmachina.com.br/thiago
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Re: Transmitting a javascript-value to the server using JSON
Posted by Kalle Korhonen <ka...@gmail.com>.
What's the closest equivalent of T4's EventListener in T5? You can do
ActionLink with zone and @OnEvent on the server, but what I loved about T4's
EventListener was that you could hook an arbitrary Javascript call to a
server side operation with one annotation. I have a case where I'd like to
do communicate in the background from plain Javascript rather than "click a
link".
Kalle
On Tue, Aug 5, 2008 at 3:30 PM, Toby Hobson <to...@googlemail.com>wrote:
> Does anyone know if something similar is available (or planned) for T5?
>
> Toby
>
> 2008/8/5 Thiago Henrique de Carvalho <ka...@gmail.com>
>
> > Hi,
> >
> > Take a look at @EventListener annotation. Docs show example of
> transmiting
> > JSON from page to Tapestry.
> >
> > Thiago
> >
> > -----Mensagem original-----
> > De: Peer Brink [mailto:peerbrink@gmail.com]
> > Enviada em: terça-feira, 5 de agosto de 2008 06:41
> > Para: users@tapestry.apache.org
> > Assunto: Transmitting a javascript-value to the server using JSON
> >
> > Hello,
> >
> > I try to transmit the users/browsers timezone-offset to the server.
> > The timeZone-offset can easily be retrieved by
> >
> > <script type="text/javascript">
> > var offset = new Date().getTimezoneOffset();
> > </script>
> >
> > But how can it be transmitted? Could this be done using a JSONObject
> > by adding "Object.toJSON(offset);"?
> >
> > I found quite some conversations in the mailing-list about
> > JSON-communication but they are all about transmitting data in the
> > other direction (server to client).
> >
> > Where would the code go in the html-source and what java-code is
> > needed to receive the value on the server-side?
> >
> > Or is there a complete other way to get this value?
> >
> > Sorry for this rookie-question. But I am not too familiar with
> > java-script and JSON.
> >
> > Thanks for any help,
> > Peer.
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> > For additional commands, e-mail: users-help@tapestry.apache.org
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> > For additional commands, e-mail: users-help@tapestry.apache.org
> >
> >
>
Re: Transmitting a javascript-value to the server using JSON
Posted by Peer Brink <pe...@gmail.com>.
Dear Toby,
thanks for your comments on this. But I decided to use a hidden form
field (from t5components) and fill it with the offset-value using
javascript. It seems to me that this is the simpler solution.
I described the details in another thread (subject: "Getting users
timezone-offset (javascript)".
Nevertheless I would very much appreciate a simple T5-support for
transfering values from the client to the server.
Regards,
Peer.
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Re: Transmitting a javascript-value to the server using JSON
Posted by Toby Hobson <to...@googlemail.com>.
Does anyone know if something similar is available (or planned) for T5?
Toby
2008/8/5 Thiago Henrique de Carvalho <ka...@gmail.com>
> Hi,
>
> Take a look at @EventListener annotation. Docs show example of transmiting
> JSON from page to Tapestry.
>
> Thiago
>
> -----Mensagem original-----
> De: Peer Brink [mailto:peerbrink@gmail.com]
> Enviada em: terça-feira, 5 de agosto de 2008 06:41
> Para: users@tapestry.apache.org
> Assunto: Transmitting a javascript-value to the server using JSON
>
> Hello,
>
> I try to transmit the users/browsers timezone-offset to the server.
> The timeZone-offset can easily be retrieved by
>
> <script type="text/javascript">
> var offset = new Date().getTimezoneOffset();
> </script>
>
> But how can it be transmitted? Could this be done using a JSONObject
> by adding "Object.toJSON(offset);"?
>
> I found quite some conversations in the mailing-list about
> JSON-communication but they are all about transmitting data in the
> other direction (server to client).
>
> Where would the code go in the html-source and what java-code is
> needed to receive the value on the server-side?
>
> Or is there a complete other way to get this value?
>
> Sorry for this rookie-question. But I am not too familiar with
> java-script and JSON.
>
> Thanks for any help,
> Peer.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> For additional commands, e-mail: users-help@tapestry.apache.org
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> For additional commands, e-mail: users-help@tapestry.apache.org
>
>
RES: Transmitting a javascript-value to the server using JSON
Posted by Thiago Henrique de Carvalho <ka...@gmail.com>.
Hi,
Take a look at @EventListener annotation. Docs show example of transmiting
JSON from page to Tapestry.
Thiago
-----Mensagem original-----
De: Peer Brink [mailto:peerbrink@gmail.com]
Enviada em: terça-feira, 5 de agosto de 2008 06:41
Para: users@tapestry.apache.org
Assunto: Transmitting a javascript-value to the server using JSON
Hello,
I try to transmit the users/browsers timezone-offset to the server.
The timeZone-offset can easily be retrieved by
<script type="text/javascript">
var offset = new Date().getTimezoneOffset();
</script>
But how can it be transmitted? Could this be done using a JSONObject
by adding "Object.toJSON(offset);"?
I found quite some conversations in the mailing-list about
JSON-communication but they are all about transmitting data in the
other direction (server to client).
Where would the code go in the html-source and what java-code is
needed to receive the value on the server-side?
Or is there a complete other way to get this value?
Sorry for this rookie-question. But I am not too familiar with
java-script and JSON.
Thanks for any help,
Peer.
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Re: Transmitting a javascript-value to the server using JSON
Posted by Toby Hobson <to...@googlemail.com>.
Hello Peer,
Sure it can be done ... have a look at JSON.stringify() at
http://www.json.org/js.html, this will turn the Javascript object into JSON
text.
On the server-side you need to use JSONTokener and JSONObject see
http://www.json.org/java/index.html to convert back to a Java object
If you need more help let me know
Regards
Toby
2008/8/5 Peer Brink <pe...@gmail.com>
> Hello,
>
> I try to transmit the users/browsers timezone-offset to the server.
> The timeZone-offset can easily be retrieved by
>
> <script type="text/javascript">
> var offset = new Date().getTimezoneOffset();
> </script>
>
> But how can it be transmitted? Could this be done using a JSONObject
> by adding "Object.toJSON(offset);"?
>
> I found quite some conversations in the mailing-list about
> JSON-communication but they are all about transmitting data in the
> other direction (server to client).
>
> Where would the code go in the html-source and what java-code is
> needed to receive the value on the server-side?
>
> Or is there a complete other way to get this value?
>
> Sorry for this rookie-question. But I am not too familiar with
> java-script and JSON.
>
> Thanks for any help,
> Peer.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> For additional commands, e-mail: users-help@tapestry.apache.org
>
>