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bufio.NewReader(os.Stdin) outside the for loop #3547

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bufio.NewReader(os.Stdin) outside the for loop #3547

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145 changes: 74 additions & 71 deletions docs/development/go/developing-udp-and-tcp-clients-and-servers-in-go/index.md
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Original file line number Diff line number Diff line change
Expand Up @@ -88,40 +88,41 @@ The TCP client that you will create in this section will allow you to interact w
package main

import (
"bufio"
"fmt"
"net"
"os"
"strings"
"bufio"
"fmt"
"net"
"os"
"strings"
)

func main() {
arguments := os.Args
if len(arguments) == 1 {
fmt.Println("Please provide host:port.")
return
}

CONNECT := arguments[1]
c, err := net.Dial("tcp", CONNECT)
if err != nil {
fmt.Println(err)
return
}

for {
reader := bufio.NewReader(os.Stdin)
fmt.Print(">> ")
text, _ := reader.ReadString('\n')
fmt.Fprintf(c, text+"\n")

message, _ := bufio.NewReader(c).ReadString('\n')
fmt.Print("->: " + message)
if strings.TrimSpace(string(text)) == "STOP" {
fmt.Println("TCP client exiting...")
return
}
arguments := os.Args
if len(arguments) == 1 {
fmt.Println("Please provide host:port.")
return
}

CONNECT := arguments[1]
c, err := net.Dial("tcp", CONNECT)
if err != nil {
fmt.Println(err)
return
}

inReader := bufio.NewReader(os.Stdin)
cReader := bufio.NewReader(c)
for {
fmt.Print(">> ")
text, _ := inReader.ReadString('\n')
fmt.Fprintf(c, text+"\n")

message, _ := cReader.ReadString('\n')
fmt.Print("->: " + message)
if strings.TrimSpace(string(text)) == "STOP" {
fmt.Println("TCP client exiting...")
return
}
}
}
{{< /file >}}

Expand Down Expand Up @@ -267,55 +268,57 @@ The UDP client that you will create in this section will allow you to interact w
package main

import (
"bufio"
"fmt"
"net"
"os"
"strings"
"bufio"
"fmt"
"net"
"os"
"strings"
)

func main() {
arguments := os.Args
if len(arguments) == 1 {
fmt.Println("Please provide a host:port string")
return
}
CONNECT := arguments[1]

s, err := net.ResolveUDPAddr("udp4", CONNECT)
c, err := net.DialUDP("udp4", nil, s)
arguments := os.Args
if len(arguments) == 1 {
fmt.Println("Please provide a host:port string")
return
}
CONNECT := arguments[1]

s, err := net.ResolveUDPAddr("udp4", CONNECT)
c, err := net.DialUDP("udp4", nil, s)
if err != nil {
fmt.Println(err)
return
}

fmt.Printf("The UDP server is %s\n", c.RemoteAddr().String())
defer c.Close()

inReader := bufio.NewReader(os.Stdin)
for {
fmt.Print(">> ")
text, _ := inReader.ReadString('\n')
fmt.Fprintf(c, text+"\n")
data := []byte(text + "\n")

_, err = c.Write(data)
if err != nil {
fmt.Println(err)
return
fmt.Println(err)
return
}

fmt.Printf("The UDP server is %s\n", c.RemoteAddr().String())
defer c.Close()

for {
reader := bufio.NewReader(os.Stdin)
fmt.Print(">> ")
text, _ := reader.ReadString('\n')
data := []byte(text + "\n")
_, err = c.Write(data)
if strings.TrimSpace(string(data)) == "STOP" {
fmt.Println("Exiting UDP client!")
return
}

if err != nil {
fmt.Println(err)
return
}
if strings.TrimSpace(string(data)) == "STOP" {
fmt.Println("Exiting UDP client!")
return
}

buffer := make([]byte, 1024)
n, _, err := c.ReadFromUDP(buffer)
if err != nil {
fmt.Println(err)
return
}
fmt.Printf("Reply: %s\n", string(buffer[0:n]))
buffer := make([]byte, 1024)
n, _, err := c.ReadFromUDP(buffer)
if err != nil {
fmt.Println(err)
return
}
fmt.Printf("Reply: %s\n", string(buffer[0:n]))
}
}
{{< /file >}}

Expand Down