Browser Information

Hi, wondering if anyone knows how to get at browser info from within
Seaside?  In .Net the web server captures a bunch of information in
Server.ServerVariables dictionary, most of that stuff I can find in
HttpRequest, I can find the referrer, user-agent, and host, but I need
the screen resolution.  I need to deliver a different css stylesheet
depending on the users screen resolution and can't seem to find anything
that'll work.

_______________________________________________
Seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

Ramon Leon wrote:
> Hi, wondering if anyone knows how to get at browser info from within
> Seaside?  In .Net the web server captures a bunch of information in
> Server.ServerVariables dictionary, most of that stuff I can find in
> HttpRequest, I can find the referrer, user-agent, and host, but I need
> the screen resolution.  I need to deliver a different css stylesheet
> depending on the users screen resolution and can't seem to find anything
> that'll work.

I don't think navigators return this by default. You might want to ask
using javascript... just a clue, sorry
_______________________________________________
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But since the web server is also a smalltalk object, he would have this
information, right?  Seems terribly inefficient to have to generate
javascript to find out the browser when the smalltalk system already
knows what it is talking to.

-----Ursprüngliche Nachricht-----
Von: [hidden email]
[mailto:[hidden email]] Im Auftrag von
Damien Cassou
Gesendet: Dienstag, 15. August 2006 17:39
An: The Squeak Enterprise Aubergines Server - general discussion.
Betreff: Re: [Seaside] Browser Information

Ramon Leon wrote:
> Hi, wondering if anyone knows how to get at browser info from within
> Seaside?  In .Net the web server captures a bunch of information in
> Server.ServerVariables dictionary, most of that stuff I can find in
> HttpRequest, I can find the referrer, user-agent, and host, but I need

> the screen resolution.  I need to deliver a different css stylesheet
> depending on the users screen resolution and can't seem to find
anything
> that'll work.

I don't think navigators return this by default. You might want to ask
using javascript... just a clue, sorry
_______________________________________________
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[hidden email]
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_______________________________________________
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self session currentRequest headerAt: 'user-agent'

Hope this helps,

-Boris

--
+1.604.689.0322
DeepCove Labs Ltd.
4th floor 595 Howe Street
Vancouver, Canada V6C 2T5

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-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Jason
Johnson
Sent: Wednesday, August 16, 2006 10:57 AM
To: 'The Squeak Enterprise Aubergines Server - general discussion.'
Subject: AW: [Seaside] Browser Information

But since the web server is also a smalltalk object, he would have this
information, right?  Seems terribly inefficient to have to generate
javascript to find out the browser when the smalltalk system already
knows what it is talking to.

-----Ursprüngliche Nachricht-----
Von: [hidden email]
[mailto:[hidden email]] Im Auftrag von
Damien Cassou
Gesendet: Dienstag, 15. August 2006 17:39
An: The Squeak Enterprise Aubergines Server - general discussion.
Betreff: Re: [Seaside] Browser Information

Ramon Leon wrote:
> Hi, wondering if anyone knows how to get at browser info from within
> Seaside?  In .Net the web server captures a bunch of information in
> Server.ServerVariables dictionary, most of that stuff I can find in
> HttpRequest, I can find the referrer, user-agent, and host, but I need

> the screen resolution.  I need to deliver a different css stylesheet
> depending on the users screen resolution and can't seem to find
anything
> that'll work.

I don't think navigators return this by default. You might want to ask
using javascript... just a clue, sorry
_______________________________________________
Seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

_______________________________________________
Seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

_______________________________________________
Seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

Jason Johnson wrote:
> But since the web server is also a smalltalk object, he would have this
> information, right?  Seems terribly inefficient to have to generate
> javascript to find out the browser when the smalltalk system already
> knows what it is talking to.

I agree.. I'd be willing to bet this is down in the bowels somewhere --
its probably just an issue of finding it and (if needed) adding a method
to make it available to the caller.  Perhaps Michel might know?  I'd
personally hope that all of that sort of information is available
besides the more obvious items -- surely someone will eventually be
interested in reviewing that information for some reason or another..

Just my $2 worth.. (which ain't much these days!)
_______________________________________________
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Answers my question.  Thanks.

-----Ursprüngliche Nachricht-----
Von: [hidden email]
[mailto:[hidden email]] Im Auftrag von Boris
Popov
Gesendet: Mittwoch, 16. August 2006 20:05
An: The Squeak Enterprise Aubergines Server - general discussion.
Betreff: RE: [Seaside] Browser Information

self session currentRequest headerAt: 'user-agent'

Hope this helps,

-Boris

--
+1.604.689.0322
DeepCove Labs Ltd.
4th floor 595 Howe Street
Vancouver, Canada V6C 2T5

[hidden email]

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This email is intended only for the persons named in the message
header. Unless otherwise indicated, it contains information that is
private and confidential. If you have received it in error, please
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Thank you.

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Jason
Johnson
Sent: Wednesday, August 16, 2006 10:57 AM
To: 'The Squeak Enterprise Aubergines Server - general discussion.'
Subject: AW: [Seaside] Browser Information

But since the web server is also a smalltalk object, he would have this
information, right?  Seems terribly inefficient to have to generate
javascript to find out the browser when the smalltalk system already
knows what it is talking to.

-----Ursprüngliche Nachricht-----
Von: [hidden email]
[mailto:[hidden email]] Im Auftrag von
Damien Cassou
Gesendet: Dienstag, 15. August 2006 17:39
An: The Squeak Enterprise Aubergines Server - general discussion.
Betreff: Re: [Seaside] Browser Information

Ramon Leon wrote:
> Hi, wondering if anyone knows how to get at browser info from within
> Seaside?  In .Net the web server captures a bunch of information in
> Server.ServerVariables dictionary, most of that stuff I can find in
> HttpRequest, I can find the referrer, user-agent, and host, but I need

> the screen resolution.  I need to deliver a different css stylesheet
> depending on the users screen resolution and can't seem to find
anything
> that'll work.

I don't think navigators return this by default. You might want to ask
using javascript... just a clue, sorry
_______________________________________________
Seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

_______________________________________________
Seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

_______________________________________________
Seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

Its not *that* bad and is surely useful in many cases, see my previous email
to the list ;)

Cheers!

-Boris

--
+1.604.689.0322
DeepCove Labs Ltd.
4th floor 595 Howe Street
Vancouver, Canada V6C 2T5

[hidden email]

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This email is intended only for the persons named in the message
header. Unless otherwise indicated, it contains information that is
private and confidential. If you have received it in error, please
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Thank you.

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Rick Flower
Sent: Wednesday, August 16, 2006 11:04 AM
To: The Squeak Enterprise Aubergines Server - general discussion.
Subject: Re: AW: [Seaside] Browser Information

Jason Johnson wrote:
> But since the web server is also a smalltalk object, he would have this
> information, right?  Seems terribly inefficient to have to generate
> javascript to find out the browser when the smalltalk system already
> knows what it is talking to.

I agree.. I'd be willing to bet this is down in the bowels somewhere --
its probably just an issue of finding it and (if needed) adding a method
to make it available to the caller.  Perhaps Michel might know?  I'd
personally hope that all of that sort of information is available
besides the more obvious items -- surely someone will eventually be
interested in reviewing that information for some reason or another..

Just my $2 worth.. (which ain't much these days!)
_______________________________________________
Seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

_______________________________________________
Seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

Jason Johnson wrote:
> But since the web server is also a smalltalk object, he would have this
> information, right?  Seems terribly inefficient to have to generate
> javascript to find out the browser when the smalltalk system already
> knows what it is talking to.

I'm not an expert, this is only what I think happens and you may want to
wait for a more precise answer.

- Theoretically, the webserver does not have to know the type of client
it talks to. The client ask for a page sending and url, and the
webserver answers a content. No need to know who is asking.

- In practice, here is what a navigator send to a webserver (extracted
from the variable request in HttpAdaptator>>beginConversation):

URL=/seaside/config; protocol=HTTP/1.1;
'accept'->'text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5'
'accept-charset'->'ISO-8859-1,utf-8;q=0.7,*;q=0.7'
'accept-encoding'->'gzip,deflate'
'accept-language'->'fr-fr,en-gb;q=0.7,en;q=0.3'
'connection'->'keep-alive' 'host'->'localhost:8080' 'keep-alive'->'300'
'user-agent'->'Mozilla/5.0 (X11; U; Linux i686; en-GB; rv:1.8.0.5)
Gecko/20060731 Ubuntu/dapper-security Firefox/1.5.0.5'


What is important for us is the last two lines. You can see that the
user-agent is filled with information about the version, the operating
system and other things like this. This information can easily be used
in your application.

But the question of Ramon wasn't about browser but about screen
resolution. As you can see, this information is not in the request. The
webserver doesn't know it and your application can't know it too...
unless the browser sends it. And that is the solution I proposed when I
say to send it using javascript. I think javascript can access this
information. With the information on the client side, you need to send
it to the webserver and then, you will be able to access it from your
component.

Hope it is clearer now



--
Damien Cassou
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Yeah, but this is totally unspecified (or no browser follows the
specification), not reliable and bad practice. Additionally it doesn't
provide the screen resolution as initially asked.

Philippe

2006/8/16, Boris Popov <[hidden email]>: _______________________________________________
Seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

Indeed, nowhere will you find screen resolution in there, but user agent is
actually used quite a bit in real world even though its not a mandatory
regulated field. That's not to say I would recommend relying on it, but its
available should you need that knowledge for whatever reason
(http://en.wikipedia.org/wiki/User_agent).

Back to resolution issue, you should be able to use scriptaculous to place
an async request on the home page that sends back,

screen.width+'@'+screen.height

to a callback, which you can then use to set the resolution on your session
and refer to it from there on in. I'll see if I can find a few minutes to
try to provide a working example.

Cheers!

-Boris

--
+1.604.689.0322
DeepCove Labs Ltd.
4th floor 595 Howe Street
Vancouver, Canada V6C 2T5

[hidden email]

CONFIDENTIALITY NOTICE

This email is intended only for the persons named in the message
header. Unless otherwise indicated, it contains information that is
private and confidential. If you have received it in error, please
notify the sender and delete the entire message including any
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Thank you.

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Philippe
Marschall
Sent: Wednesday, August 16, 2006 11:21 AM
To: The Squeak Enterprise Aubergines Server - general discussion.
Subject: Re: [Seaside] Browser Information

Yeah, but this is totally unspecified (or no browser follows the
specification), not reliable and bad practice. Additionally it doesn't
provide the screen resolution as initially asked.

Philippe

2006/8/16, Boris Popov <[hidden email]>: Seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

_______________________________________________
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Nah, there's no good reliable way to get screen res in any framework without
JavaScript, and frankly, JavaScript is not a good solution.  The real
problem was the approach, which I've changed.  I was trying to accommodate a
designer, I told him to make a better style sheet that works for all
resolutions, end of problem.

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Heh, good one there. I wondered about that, but figured there must be a good
reason for it :)

-Boris

--
+1.604.689.0322
DeepCove Labs Ltd.
4th floor 595 Howe Street
Vancouver, Canada V6C 2T5

[hidden email]

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This email is intended only for the persons named in the message
header. Unless otherwise indicated, it contains information that is
private and confidential. If you have received it in error, please
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Thank you.

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Ramon Leon
Sent: Wednesday, August 16, 2006 11:52 AM
To: 'The Squeak Enterprise Aubergines Server - general discussion.'
Subject: RE: [Seaside] Browser Information
Nah, there's no good reliable way to get screen res in any framework without
JavaScript, and frankly, JavaScript is not a good solution.  The real
problem was the approach, which I've changed.  I was trying to accommodate a
designer, I told him to make a better style sheet that works for all
resolutions, end of problem.

_______________________________________________
Seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

_______________________________________________
Seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

Hi!

Ramon Leon <[hidden email]> wrote:
> Hi, wondering if anyone knows how to get at browser info from within
> Seaside?  In .Net the web server captures a bunch of information in
> Server.ServerVariables dictionary, most of that stuff I can find in
> HttpRequest, I can find the referrer, user-agent, and host, but I need
> the screen resolution.  I need to deliver a different css stylesheet
> depending on the users screen resolution and can't seem to find anything
> that'll work.

Also note that using the unit "em" makes your stylesheets "resolution
aware" in a sense.
AFAIK it is the recommended unit for font sizing for example.

regards, Göran
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Yes, you're right of course.  Not sure how I missed it.  But in any case
I wanted to know how to get the user agent stuff. :)

-----Ursprüngliche Nachricht-----
Von: [hidden email]
[mailto:[hidden email]] Im Auftrag von
Damien Cassou
Gesendet: Mittwoch, 16. August 2006 20:20
An: The Squeak Enterprise Aubergines Server - general discussion.
Betreff: Re: AW: [Seaside] Browser Information


But the question of Ramon wasn't about browser but about screen
resolution. As you can see, this information is not in the request. The
webserver doesn't know it and your application can't know it too...
unless the browser sends it. And that is the solution I proposed when I
say to send it using javascript. I think javascript can access this
information. With the information on the client side, you need to send
it to the webserver and then, you will be able to access it from your
component.

Hope it is clearer now



--
Damien Cassou
_______________________________________________
Seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

_______________________________________________
Seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside