Dennis Lee Bieber <wlfr...@ix.netcom.com> 於 2019年11月21日 週四 上午2:17寫道：
> On Wed, 20 Nov 2019 18:51:31 +0800, lampahome <pahome.c...@mirlab.org> > declaimed the following: > > > > >I only use a while loop to catch events like below: > >import select, socket > >sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) > >sock.bind() > > Documentation indicates that one must provide an address (ip, > port) for > the bind -- there is no default described. > > sorry, I just write a brief code so I don't write whole detail ex: (ip, port). But it can receive any connection and bind successfully. > >sock.listen(10) > > You've specified that 10 connections can be held in the backlog, > any > beyond that will be refused. > > But there's one client and it send 128 messages with different length. > for fd,event in events: > > if event & select.EPOLLIN: > > sock.recv(1024) > >... > > Documentation is a bit week -- there is no description of what > .poll() > returns in the help file. > > Point #1: you are using STREAM => implies TCP. TCP is not a > "message" > related protocol. Multiple "sends" can be one "receive" packet. One "send" > can also be multiple "receive" packets. You truncated anything that would > show if your processing is parsing out some high-level protocol showing the > handling of such combined or split packets. > > Maybe this is the point! Multiple sends which doesn't full a 1024-length buffer will make me receive one packet. > Also, the help system links to > https://linux.die.net/man/4/epoll > which has > """ > Q7 > If more than one event comes in between epoll_wait(2) calls, are they > combined or reported separately? > A7 > They will be combined. > """ > -- https://mail.python.org/mailman/listinfo/python-list
