当前位置：文江博客话题详情

Erlang catch 断开客户端连接

发布于 2024-11-05 13:38:16 字数 67 浏览 5 评论 0原文

我有用 erlang 和命令处理程序编写的 tcp 服务器。如果客户端连接到我的服务器，然后关闭我如何捕获网络断开连接？

原文

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

一身仙ぐ女味 2024-11-12 13:38:16

我假设您正在使用 vanilla gen_tcp 来实现您的服务器。
在这种情况下，当客户端关闭套接字时，接受进程（将 Socket 传递给的进程）将收到一条 {tcp_close, Socket} 消息。

erlang gen_tcp 文档中的示例代码。

start(LPort) ->
    case gen_tcp:listen(LPort,[{active, false},{packet,2}]) of
        {ok, ListenSock} ->
            spawn(fun() -> server(LS) end);
        {error,Reason} ->
            {error,Reason}
    end.

server(LS) ->
    case gen_tcp:accept(LS) of
        {ok,S} ->
            loop(S),
            server(LS);
        Other ->
            io:format("accept returned ~w - goodbye!~n",[Other]),
            ok
    end.

loop(S) ->
    inet:setopts(S,[{active,once}]),
    receive
        {tcp,S,Data} ->
            Answer = do_something_with(Data), 
            gen_tcp:send(S,Answer),
            loop(S);
        {tcp_closed,S} ->
            io:format("Socket ~w closed [~w]~n",[S,self()]),
            ok
    end.

I presume u are using vanilla gen_tcp to implement your server.
In which case, acceptor process (the process you pass the Socket to) will receive a {tcp_closed, Socket} message when the socket is closed from the client end.

sample code from the erlang gen_tcp documentation.

start(LPort) ->
    case gen_tcp:listen(LPort,[{active, false},{packet,2}]) of
        {ok, ListenSock} ->
            spawn(fun() -> server(LS) end);
        {error,Reason} ->
            {error,Reason}
    end.

server(LS) ->
    case gen_tcp:accept(LS) of
        {ok,S} ->
            loop(S),
            server(LS);
        Other ->
            io:format("accept returned ~w - goodbye!~n",[Other]),
            ok
    end.

loop(S) ->
    inet:setopts(S,[{active,once}]),
    receive
        {tcp,S,Data} ->
            Answer = do_something_with(Data), 
            gen_tcp:send(S,Answer),
            loop(S);
        {tcp_closed,S} ->
            io:format("Socket ~w closed [~w]~n",[S,self()]),
            ok
    end.

回复收藏 0 原文