我正在读取TCP套接字上的输入行,类似于：
@H_403_2@class Bla
def getcmd
@sock.gets unless @sock.closed?
end
def start
srv = TCPServer.new(5000)
@sock = srv.accept
while ! @sock.closed?
ans = getcmd
end
end
end
如果端点在getline()运行时终止连接,则gets()挂起.
我该如何解决这个问题？是否有必要进行非阻塞或定时I / O？
解决方法
您可以使用select来查看是否可以安全地从套接字获取,请参阅以下使用此技术实现TCPServer.
@H_403_2@require 'socket'
host,port = 'localhost',7000
TCPServer.open(host,port) do |server|
while client = server.accept
readfds = true
got = nil
begin
readfds,writefds,exceptfds = select([client],nil,0.1)
p :r => readfds,:w => writefds,:e => exceptfds
if readfds
got = client.gets
p got
end
end while got
end
end
这里是一个试图打破服务器的客户端：
@H_403_2@require 'socket' host,7000 TCPSocket.open(host,port) do |socket| socket.puts "Hey there" socket.write 'he' socket.flush socket.close end