I am a beginner in Golang, This is a TCP server that receives requests and
sends back a hello message to the client attached with the client's
message(name)
*how can I fill those requests into a map without erasing the previous
request?*
this is the code, the request is appended to the map but when the next
comes, it replaces the current on.
// Goroutine and Socket programming TCP server
//**************************************************
// TCP
//----------------------------------------------------------
package main
import (
"bufio"
"fmt"
"net"
"time"
)
// check if there is any error and send a message. but it's better to remove
panic later (it's not recommended to use it)
//***********************************************************************************************************************
func check(err error, message string) {
if err != nil {
panic(err)
}
fmt.Printf("%s\n", message)
}
// Create the client structure that contains the client's name and the
connection
//****************************************************************************
type ClientJob struct {
name string
conn net.Conn
}
// Create the function,the channel with type struct
//*********************************************************
func generateResponses(clientJobs chan ClientJob) {
for {
// Wait for the next job to come off the queue.
clientJob := <-clientJobs
// Do something thats keeps the CPU buys for a whole second.
for start := time.Now(); time.Now().Sub(start) < time.Second; {
}
// Send back the response.
clientJob.conn.Write([]byte("Hello, " + clientJob.name))
//clientJob:=make(chan ClientJob)
//name:=make(chan string)
//name:=<-clientJobs
all := make(map[string]string) // create the map
all["client request"] = clientJob.name// append the client requests on
map
fmt.Println("All requests in the slice", all) // show all the requests
in the map
}
}
// The main function
//***********************************
func main() {
clientJobs := make(chan ClientJob) // declare the channel used in the
function above
go generateResponses(clientJobs) // put the function in a goroutine
ln, err := net.Listen("tcp", ":8080") // connect to the port 8080, it can
be changed to any port if needed
check(err, "Server is ready.") // show the message that the server is ready
to receive
//fmt.Println(<-clientJobs)
// start checking the connection et receiving from the client and pass it
into a goroutine and send it via a channel ClientJobs<-ClientJob{name, conn}
for {
conn, err := ln.Accept()
check(err, "Accepted connection.")
go func() {
buf := bufio.NewReader(conn)
for {
name, err := buf.ReadString('\n')
if err != nil {
fmt.Printf("Client disconnected.\n")
break
}
clientJobs <- ClientJob{name, conn} // pass the name and conn
to the clientJobs channel
}
}()
}
}
--
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.
To view this discussion on the web visit
https://groups.google.com/d/msgid/golang-nuts/2457abfa-04c9-476c-a2e4-b86e8e49e012%40googlegroups.com.
