I try to change the IP address and close the software related,but it sometimes still can't run sucessfully.Sometimes it can run parts of the result I hope to see.It shows that the client can connect with the server but the server can't connect the client and get the message.
在 2017年11月7日星期二 UTC+8下午3:22:44，Karan Chaudhary写道： > > Is the port 5000 on 192.168.153.239 open? If it is open, is your server > running on that port? > > > https://stackoverflow.com/questions/2972600/no-connection-could-be-made-because-the-target-machine-actively-refused-it > > On Monday, 6 November 2017 19:30:22 UTC+5:30, 28911...@gmail.com wrote: >> >> I try to modify the program,but the result is: host:portfatal error: dial >> tcp 192.168.153.239:5000: connectex: No connection could be made because >> the target machine actively refused it.exit status 1.How to solve it?? >> >> 在 2017年11月6日星期一 UTC+8下午5:08:26，rog写道： >> >>> On 30 October 2017 at 06:55, <28911...@gmail.com> wrote: >>> > I write this code in the follwings: >>> > package main >>> > >>> > import ( >>> > "fmt" >>> > "net" >>> > "os" >>> > ) >>> > >>> > func main() { >>> > service := ":5000" >>> > tcpAddr, err := net.ResolveTCPAddr("tcp", service) >>> > checkError(err) >>> > listener, err := net.ListenTCP("tcp", tcpAddr) >>> > checkError(err) >>> > for i := 0; i < 10; i++ { >>> > conn, err := listener.Accept() >>> > if err != nil { >>> > continue >>> > } >>> > handleClient(conn) >>> > conn.Close() >>> > } >>> > } >>> > func handleClient(conn net.Conn) { >>> > var buf [512]byte >>> > for { >>> > n, err := conn.Read(buf[0:]) >>> > if err != nil { >>> > return >>> > } >>> > rAddr := conn.RemoteAddr() >>> > fmt.Println("receive from client", rAddr.String(), string(buf[0:n])) >>> > _, err2 := conn.Write([]byte("welcome client!")) >>> > if err2 != nil { >>> > return >>> > } >>> > } >>> > } >>> > func checkError(err error) { >>> > if err != nil { >>> > fmt.Fprintf(os.Stderr, "fatal error: %s", err.Error()) >>> > os.Exit(1) >>> > } >>> > } >>> > >>> > >>> > I try to run it in Sublime Text3 but it has no reaction and I try to >>> run it >>> > in running windows, it shows: >>> > fatal error: lsiten tcp:5000:bind:Only one usage of each socket >>> > address(protocol/network address/port) is normally permitted.exit >>> status 1 >>> >>> From that error message, I suspect that you already have a running >>> instance >>> of your program - as the message says, you are only allowed to listen >>> on a port once. >>> >>> To avoid that, you could listen on port zero, which will choose an >>> arbitrary >>> port (but then you'll need to print out the port number so that you can >>> know which port to use on the client). >>> >>> By the way, your code is a little bit more complex than >>> it needs to be. Instead of this: >>> >>> > service := ":5000" >>> > tcpAddr, err := net.ResolveTCPAddr("tcp", service) >>> > checkError(err) >>> > listener, err := net.ListenTCP("tcp", tcpAddr) >>> >>> You could do: >>> >>> service := ":5000" >>> listener, err := net.Listen("tcp", tcpAddr) >>> >>> Similarly when dialing - there's no need to call ResolveTCPAddr >>> explicitly (and it's actually not as good if you do that, >>> because Dial will automatically use multiple IP addresses >>> if it needs to, but if you use ResolveTCPAddr, it can only use one). >>> >>> Hope this helps, >>> >>> rog. >>> >> -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
