From: Robert Klemme <shortcutter@...>
Date: 2008-10-17T20:24:30+09:00
Subject: Re: socket recv or gets?

On 17.10.2008 12:09, Jamal Soueidan wrote:
> Robert Klemme wrote:
>> On 17.10.2008 09:40, Jamal Soueidan wrote:
>>> print out the message?
>>>
>>> Why? :D
>> See documentation. #gets tries to read a line (i.e. until it sees a line
>> terminator).  Also, I believe recv also works with UDP while I am not
>> sure about gets.
>>
>> Cheers
>>
>>   robert
> 
> Hmm, I looked before at documentation and they wrote...
> 
> "A separator of nil reads the entire contents..."
> 
> so I did :)
> 
> @data = gets()

Look again. http://www.ruby-doc.org/core/classes/IO.html#M002297

Note, that instead of gets(nil) you can as well use read.

> But my code stops after that and wouldn't continue? even though 
> gets(nil) is the same, I also tried that, didn't work.

You need to understand blocking IO: the IO operation blocks until 
everything is read.  In case of a socket, it will only return if there 
was an error or the other party closed the socket.  So, you need to 
define the protocol in a way that you either know beforehand how much 
you need to read (then you can use read(length) or recv(length)) or you 
need a separator that you can use to recognize message end (then you can 
use gets(separator)).

Kind regards

	robert