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mantianyu
V2EX  ›  程序员

socket 编程 recv 调用能否每次最多读一行?

  •  
  •   mantianyu · 2013-12-09 17:56:23 +08:00 · 3068 次点击
    这是一个创建于 4002 天前的主题,其中的信息可能已经有所发展或是发生改变。
    When communicating with serial port, I can set the serial port in Canonical Mode so that each read() call will return util a line comes, and at most one line.

    assumes the line separator is \r\n.

    Does TCP/IP communication support this feature?

    I know that TCP/IP is based on stream and will take 'a','b','c' and '\r','\n' all the same, but I really don't want to parse the message char by char to find '\r','\n' in application.

    I hope the TCP can do it for me...

    any idea?
    7 条回复    1970-01-01 08:00:00 +08:00
    binux
        1
    binux  
       2013-12-09 17:58:18 +08:00
    do it yourself
    bigeagle
        2
    bigeagle  
       2013-12-09 19:28:16 +08:00
    This is definitely application logic, which TCP should not handle.

    So keep calm and implement it yourself.
    VYSE
        3
    VYSE  
       2013-12-09 19:45:09 +08:00
    socket.makefile
    then readline
    rrfeng
        4
    rrfeng  
       2013-12-09 19:49:47 +08:00
    while ‘\r\n’ not in data
    data+=recv()
    mantianyu
        5
    mantianyu  
    OP
       2013-12-09 20:19:12 +08:00
    @binux
    @bigeagle
    @VYSE
    @rrfeng

    谢谢大家^_^
    sgissb1
        6
    sgissb1  
       2013-12-09 21:45:25 +08:00
    ni hao !

    ni wei shen me zhe me diao ?

    ni wei shen me yao mei ci du yi hang?
    bombless
        7
    bombless  
       2013-12-10 13:27:37 +08:00
    噗,肯定要缓存结果的,TCP是8位流又不是数据包。
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