send a message to all client when a user leave channel - meteorserver

Message from discussion send a message to all client when a user leave channel
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In-Reply-To: <6369e849-45ea-4db2-b130-0f3a080455fd@l12g2000yqo.googlegroups.com>
References: <6369e849-45ea-4db2-b130-0f3a080455fd@l12g2000yqo.googlegroups.com>
Date: Tue, 30 Jun 2009 17:17:40 +0200
Message-ID: <3aa908f00906300817m784f005dpdbb5a29e0ae65...@mail.gmail.com>
Subject: Re: send a message to all client when a user leave channel
From: =?UTF-8?B?SmFuIEhhbsSNacSN?= <jan.han...@gmail.com>
To: meteorserver@googlegroups.com

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Hi,
define a unload event handler and make a AJAX call to your server, telling
it the client is logging off. And send an updated list of present users
trough a channel.
Just make sure you make a synchronous AJAX request (some browsers do not
allow asynchronous requests in the unload event).

There will still be cases where you will have "zombie" users, because, for
some reason or other, the unload event won't fire.
I solved this so that every client updates it's last seen flag on the serve=
r
every X minutes, and then I made a cron script that runs every X minutes an=
d
removes the "zombie" clients and sends a new list to connected clients.

Hope this helps.

--
Jan Han=C4=8Di=C4=8D
http://hancic.info


On Tue, Jun 30, 2009 at 4:16 PM, rico <ric...@gmail.com> wrote:

>
> Hello :)
>
> I wonder how it could be possible to send a message when a user leave
> the channel.
>
> In the case of a chat example, when a user join the chanel and send
> his first message, all client could see his nickname on a sidelist.
>
> But when this user leave the channel, how can we tell all subscribers
> to remove this nickname in this sidelist ?
>
>
> thanks by advance for response
>
> rico
> >
>

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Hi,<div><br></div><div>define a unload event handler and make a AJAX call t=
o your server, telling it the client is logging off. And send an updated li=
st of present users trough a channel.</div><div>Just make sure you make a=
=C2=A0<font class=3D"Apple-style-span" face=3D"-webkit-sans-serif"><span cl=
ass=3D"Apple-style-span" style=3D"line-height: 19px;">synchronous AJAX requ=
est (some browsers do not allow asynchronous requests in the unload event).=
</span></font></div>
<div><font class=3D"Apple-style-span" face=3D"-webkit-sans-serif"><span cla=
ss=3D"Apple-style-span" style=3D"line-height: 19px;"><br></span></font></di=
v><div><font class=3D"Apple-style-span" face=3D"-webkit-sans-serif"><span c=
lass=3D"Apple-style-span" style=3D"line-height: 19px;">There will still be =
cases where you will have &quot;zombie&quot; users,=C2=A0because, for some =
reason or other, the unload event won&#39;t fire.</span></font></div>
<div><font class=3D"Apple-style-span" face=3D"-webkit-sans-serif"><span cla=
ss=3D"Apple-style-span" style=3D"line-height: 19px; ">I solved this so that=
 every client updates it&#39;s last seen flag on the server every X minutes=
, and then I made a cron script that runs every X minutes and removes the &=
quot;zombie&quot; clients and sends a new list to connected clients.</span>=
</font></div>
<div><font class=3D"Apple-style-span" face=3D"-webkit-sans-serif"><span cla=
ss=3D"Apple-style-span" style=3D"line-height: 19px;"><br></span></font></di=
v><div><font class=3D"Apple-style-span" face=3D"-webkit-sans-serif"><span c=
lass=3D"Apple-style-span" style=3D"line-height: 19px;">Hope this helps.</sp=
an></font></div>
<div><br clear=3D"all">--<br>Jan Han=C4=8Di=C4=8D<br><a href=3D"http://hanc=
ic.info">http://hancic.info</a><br>
<br><br><div class=3D"gmail_quote">On Tue, Jun 30, 2009 at 4:16 PM, rico <s=
pan dir=3D"ltr">&lt;<a href=3D"mailto:ric...@gmail.com">ric...@gmail.com</a=
>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 =
0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<br>
Hello :)<br>
<br>
I wonder how it could be possible to send a message when a user leave<br>
the channel.<br>
<br>
In the case of a chat example, when a user join the chanel and send<br>
his first message, all client could see his nickname on a sidelist.<br>
<br>
But when this user leave the channel, how can we tell all subscribers<br>
to remove this nickname in this sidelist ?<br>
<br>
<br>
thanks by advance for response<br>
<font color=3D"#888888"><br>
rico<br>
<br>
</font></blockquote></div><br></div>

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