//发送信息函数
func sendMsg(con net.Conn) {
for {
var strv [1024]byte
C.myscan(unsafe.Pointer(&strv[0]))
l := 1024
for {
if (strv[l-1] < 'a' || strv[l-1] > 'z') && (strv[l-1] < 'A' || strv[l-1] > 'Z') && (strv[l-1] < '0' || strv[l-1] > '9') {
l = l - 1
} else {
break
}
}
str := string(strv[0:l])
//fmt.Scanf("%s\n", &str) //屏幕输入
//如果输入quit则结束连接
if str == "quit" {
ColorEdit(12)
fmt.Println("Communication terminated.")
os.Exit(1)
}
in, err := con.Write([]byte(str)) //将输入的内容发送给服务器端
if err != nil {
ColorEdit(12)
fmt.Printf("Error when send to server: %d\n", in)
os.Exit(0)
}
}
c <- 1
}
//发送信息函数，send message function
func sendMsg(con net.Conn) {
for {
/*
声明一个大小为1024的byte型变量strv
declare a variable(strv) which size is 1024 and belong to byte type
*/
var strv [1024]byte
/*
调用C语言函数从屏幕输入，将strv首位指针作为参数传递给myscan()
call gets() function which belongs to C programing language
aim to get the information of the user input.
transfer a parameter to myscan(),the parameter is the first pointer of strv
*/
C.myscan(unsafe.Pointer(&strv[0]))
/*
声明一个整数变量L，用于将要取出的strv的长度
declare a variable(L) aim to get the length of strv
*/
l := 1024
/*
从strv的末尾开始判断ASCII值，如果为0，则长度L减1
judge ASCII value from the end of strv,if it is 0,the length decrease 1
*/
for {
if strv[l-1] == 0 {
l = l - 1
} else {
break
}
}
/*
类型转换，取strv的首位到L的长度转换为string
type conversion,get a length from begining to L aim to convert to the type of string
*/
str = string(strv[:l])
if str == "quit" { //如果输入quit则结束连接
ColorEdit(12) //红色,12 represents red color
fmt.Println("Communication terminated.")
os.Exit(1)
}
in, err := con.Write([]byte(str)) //将输入的内容发送给服务器端,send the input message to server
if err != nil {
ColorEdit(12) //红色,12 represents red color
fmt.Printf("Error when send to server: %d\n", in)
os.Exit(0)
}
}
c <- 1
}
func main() {
readFile(fName) //读取配置文件,read the configuration file
/*
提示即将连接服务器
Tip "the server will be connect"
*/
fmt.Println("You will connect the server : ", remote)
ColorEdit(12) //红色,12 represents red color
for {
//输入昵称,enter nickname
fmt.Printf("Enter a nicename:")
/*
声明一个大小为1024的byte型变量strv
declare a variable(strv) which size is 1024 and belong to byte type
*/
var strv [1024]byte
/*
调用C语言gets函数获取用户输入的信息，将strv首位指针作为参数传递给myscan()
call gets() function which belongs to C programing language
aim to get the information of the user input.
transfer a parameter to myscan(),the parameter is the first pointer of strv
*/
C.myscan(unsafe.Pointer(&strv[0]))
/*
声明一个整数变量L，用于将要取出的strv的长度
declare a variable(L) aim to get the length of strv
*/
l := 1024
/*
从strv的末尾开始判断ASCII值，如果为0，则长度L减1
judge ASCII value from the end of strv,if it is 0,the length decrease 1
*/
for {
if strv[l-1] == 0 {
l = l - 1
} else {
break
}
}
/*
类型转换，取strv的首位到L的长度转换为string
type conversion,get a length from begining to L aim to convert to the type of string
*/
str = string(strv[:l])
if str == "" {
fmt.Printf("Please input a right nicename!\n")
continue
}
if str == "query" {
fmt.Printf("query is a keyword , please input a right nicename!\n")
continue
}
break
}
/*
与远程服务器建立连接，返回连接con
a connection with the remote server，return connection value con
*/
con, err := net.Dial("tcp", remote)
defer con.Close() //延迟关闭连接,delay to close connection
if err != nil {
ColorEdit(12) //红色,12 represents red color
fmt.Println("Server not found.")
os.Exit(-1)
}
/*
将昵称发送给服务器端
send the nickname to server
*/
in, err := con.Write([]byte(str))
if err != nil {
ColorEdit(12) //红色,12 represents red color
fmt.Printf("Error when send to server: %d\n", in)
os.Exit(0)
}
ColorEdit(11) //青色,11 represents cyan color
fmt.Println("Connection OK.")
length, err := con.Read(msg) //接收欢迎信息,receive welcome message
if err != nil {
ColorEdit(12) //红色,12 represents red color
fmt.Printf("Error when read from server.\n")
os.Exit(0)
}
str = string(msg[0:length]) //格式转换,format conversion
fmt.Println(str) //将信息显示到屏幕,display the message on screen
ColorEdit(10) //绿色,10 represents green color
go receiveMsg(con) //接收信息goroutine,receive the message
go sendMsg(con) //发送信息goroutine,send the message
<-c
<-c
}
func main() {
readFile(fName)
fmt.Println("You will connect the server : ", remote)
//输入昵称
ColorEdit(12)
for {
fmt.Printf("Enter a nicename:")
var strv [1024]byte
C.myscan(unsafe.Pointer(&strv[0]))
l := 1024
for {
if (strv[l-1] < 'a' || strv[l-1] > 'z') && (strv[l-1] < 'A' || strv[l-1] > 'Z') && (strv[l-1] < '0' || strv[l-1] > '9') {
l = l - 1
} else {
break
}
}
str := string(strv[0:l])
fmt.Printf(str)
//fmt.Scanf("%s\n", &str) //屏幕输入
if str == "" {
fmt.Printf("Please input a right nicename!\n")
continue
}
if str == "query" {
fmt.Printf("query is a keyword , please input a right nicename!\n")
continue
}
break
}
con, err := net.Dial("tcp", remote) //与远程服务器监理连接，返回连接con
defer con.Close() //延迟关闭连接
if err != nil {
ColorEdit(12)
fmt.Println("Server not found.")
os.Exit(-1)
}
//in, err := con.Write(strv[0:l]) //将昵称发送给服务器端
in, err := con.Write([]byte(str)) //将昵称发送给服务器端
if err != nil {
ColorEdit(12)
fmt.Printf("Error when send to server: %d\n", in)
os.Exit(0)
}
ColorEdit(11)
fmt.Println("Connection OK.")
//接收欢迎信息
length, err := con.Read(msg)
if err != nil {
ColorEdit(12)
fmt.Printf("Error when read from server.\n")
os.Exit(0)
}
str = string(msg[0:length]) //格式转换
fmt.Println(str) //将信息显示到屏幕
ColorEdit(10)
go receiveMsg(con) //接收信息goroutine
go sendMsg(con) //发送信息，不用goroutine的原因是为了防止main结束
<-c
<-c
}