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于 2011/3/31 15:04, Joe Armstrong 写道:
<blockquote
cite="mid:AANLkTi=H6kOZM6ObDMzFN2_6Y10CG=qr4eiaLfPtxvwP@mail.gmail.com"
type="cite"><br>
<br>
<div class="gmail_quote">On Tue, Mar 29, 2011 at 5:45 AM, zhangbo
<span dir="ltr"><<a moz-do-not-send="true"
href="mailto:bo.zhang86@gmail.com">bo.zhang86@gmail.com</a>></span>
wrote:<br>
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0.8ex; border-left: 1px solid rgb(204, 204, 204);
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Hi,<br>
Code:<br>
{ok, Listen} = gen_tcp:listen(80, [{packet,0},<br>
binary,<br>
{active, true}])<br>
<br>
Loop:<br>
receive<br>
{tcp, S, Bin} -><br>
...<br>
<br>
I want to know, when a client send a message("helloworld") to
server, then send another message("helloworld2"). How many
messages will the server receive? (I guess 2.) If the client
send very fast, or the message is big enough, how the
situation again?<br>
<br>
When receive {tcp, S, Bin}, Bin stands for a message or maybe
just a fragment of message? If the client send "hello,
server", Bin maybe "hello, server", but If the message is very
big, what will Bin be? and how many times will the loop
receive?<br>
</blockquote>
<div><br>
because you have said {packet,0} then data might become
fragmented. The options {packet,2}, (or {packet,4} mean "send
a 2(4) byte length header at the start of the data". If the
client and server<br>
both open a socket with {packet,4} then any fragmentation will
be taken care of by the tcp driver. In this<br>
case any packet fragments will be recombined by the driver and
only completed messages delivered to<br>
the application.<br>
<br>
/Joe<br>
<br>
<br>
</div>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
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padding-left: 1ex;">
<br>
<br>
<br>
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Joe：<br>
nice！<br>
thanks<br>
<br>
<pre class="moz-signature" cols="72">--
Best Regards
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