[erlang-questions] Question about gen_tcp:recv

Andrew Thompson <>
Tue Nov 1 21:31:09 CET 2011


On Tue, Nov 01, 2011 at 01:15:19PM -0700, flowerstars wrote:
> Hi guys, 
> 
> I am a beginner of learning erlang. My problem is whenever I call
> gen_tcp:recv, I got {error, closed} all the time. 
> 
> The procedure is as following: 
> 
> 1> Opts = [list, {packet, 0}, {active, false}, {reuseaddr, true}]. 
> [list,{packet,0},{active,false},{reuseaddr,true}] 
> 2> {ok, Sock} = gen_tcp:connect("pop.gmail.com", 995, Opts). 
> {ok,#Port<0.526>} 
> 3> Res = gen_tcp:recv(Sock, 0). 
> {error, closed} 
> 
> Is the problem about my code or about the pop server? 
> 
> Thanks so much for your reply.
> 

995 is the SSL port for pop3, the server is probably waiting for the SSL
handshake. If you want this to work, you'll have to use the ssl:connect
function and friends.

Andrew



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