Eventmachine talk - Jul 2006 - host and port information of remote connection

hello,

is it possible to get the host and port information of a Connection
instance?

btw: how is eventmachine separating the messages between server and
client? if it''s done by a terminator like \r\n, is it possible to
change it, i.e. to \0? i need that for a connection to a flash client.


regards, sascha

The peer information (host and port) are now available but you have to get
the latest gem, which is not in rubyforge unfortunately. I attached it to
this email. Look for the peername method.

EM doesn''t send any "separators" in the datastream.
That''s entirely
controlled by the data you send.

On 7/5/06, Sascha Ernst <mail at big-ernesto.de>
wrote:
>
> hello,
>
> is it possible to get the host and port information of a Connection
> instance?
>
> btw: how is eventmachine separating the messages between server and
> client? if it''s done by a terminator like \r\n, is it possible to
> change it, i.e. to \0? i need that for a connection to a flash client.
>
>
> regards, sascha
> _______________________________________________
> Eventmachine-talk mailing list
> Eventmachine-talk at rubyforge.org
> http://rubyforge.org/mailman/listinfo/eventmachine-talk
>
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Sascha Ernst wrote:
> is it possible to get the host and port information of a Connection
> instance?
>
Apparently this will be in version 0.5.4  Francis added a method called
''get_peername'' that does this.
> btw: how is eventmachine separating the messages between server and
> client? if it''s done by a terminator like \r\n, is it possible to
> change it, i.e. to \0? i need that for a connection to a flash client.
It doesn''t separate messages between server and client.  It does almost
no processing of data received from the network.  From the rdoc:

  You must not make any assumptions about the size of the incoming data
  packets, or about their alignment on any particular intra-message or
  PDU boundaries (such as line breaks). receive_data can and will send
  you arbitrary chunks of data, with the only guarantee being that the
  data is presented to your code in the order it was collected from the
  network. Don?t even assume that the chunks of data will correspond to
  network packets, as EventMachine can and will coalesce several
  incoming packets into one, to improve performance. The implication for
  your code is that you generally will need to implement some kind of a
  state machine in your redefined implementation of receive_data.

See here [1] for an example of how this probably should be done,
especially the receive_data method in the StyxClient module. (NB, this
is my Ruby implementation of the 9P2000/Styx client and later this''ll
be
a server implementation too).

[1]
http://rubyforge.org/cgi-bin/viewvc.cgi/rstyx/lib/rstyx/client.rb?revision=1.21&root=rstyx

- --
We are here for no purpose, unless we can invent one.
http://stormwyrm.blogspot.com/
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