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package main
import (
"encoding/json"
"fmt"
"log"
"net"
"sync"
)
func main() {
var wg sync.WaitGroup
conn, err := net.Dial("tcp", "localhost:8080")
handleError(err)
defer conn.Close()
wg.Add(1)
go func(conn net.Conn) {
buf := make([]byte, 4096)
authMsg, _ := json.Marshal(Message{
Type: AUTHENTICATE,
Data: "auth",
User: "andrew",
})
_ = sendMessage(conn, authMsg)
for i := 0; i < 20; i += 1 {
fmt.Printf("Sending %d request\n", i)
request, _ := json.Marshal(Message{
Type: MESSAGE,
Data: fmt.Sprintf("Hello, %d", i),
User: "andrew",
})
err = sendMessage(conn, request)
if err != nil {
break
}
fmt.Println("Waiting for response")
_, _ = conn.Read(buf)
size := fromBytes(buf[:4])
response := parseResponse(buf[4 : size+4])
fmt.Printf("Response: %s\n", response.Data)
}
exitMsg, _ := json.Marshal(Message{
Type: MESSAGE,
Data: "exit",
User: "andrew",
})
_ = sendMessage(conn, exitMsg)
wg.Done()
}(conn)
wg.Wait()
}
func handleError(err error) {
if err != nil {
log.Fatal(err)
}
}
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