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我试图使用gen_tcp模块。 有服务器端代码的例子,我有麻烦。如何检测与gen_tcp的tcp-client断开连接?
%% First, I bind server port and wait for peer connection
{ok, Sock} = gen_tcp:listen(7890, [{active, false}]),
{ok, Peer} = gen_tcp:accept(Sock),
%% Here client calls `gen_tcp:close/1` on socket and goes away.
%% After that I am tryin' send some message to client
SendResult = gen_server:send(Peer, <<"HELLO">>),
%% Now I guess that send is failed with {error, closed}, but...
ok = SendResult.
当我再打电话gen_tcp:send/2
,第二次调用返回西港岛线作为{error, closed}
预期。但我想明白,为什么第一次通话成功了?我是否缺少一些特定于tcp的细节? 这种奇怪的(对我来说)行为只适用于{active,false}连接。