88 lines
1.5 KiB
Go
88 lines
1.5 KiB
Go
package utils
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import (
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"io"
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"log"
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"net"
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"time"
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)
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const ServerType = "tcp"
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var ServerRunning = false
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var client net.Conn
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var server net.Listener
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var ClientReady = false
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func Listen(address string) {
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var err error
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server, err = net.Listen(ServerType, address)
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if err != nil {
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log.Fatal("error in create server ", err)
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}
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defer server.Close()
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log.Println("listen on ", address)
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for ServerRunning {
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conn, err := server.Accept()
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if err != nil {
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ServerRunning = false
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log.Fatalln("error in create connection ", err)
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}
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if client == nil {
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client = conn
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ClientReady = false
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log.Println("client connected ", client.RemoteAddr())
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LoadUnprocessed()
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} else {
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log.Println("client already connected, close")
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client.Close()
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client = nil
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conn.Close()
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}
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if IsClientConnected() {
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connCheck()
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}
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time.Sleep(2 * time.Second)
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}
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}
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func WriteToClient(data string) error {
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_, err := client.Write([]byte(data + "\r\n"))
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if err != nil {
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log.Println("error in write data to client socket ", err)
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closeClient()
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}
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return err
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}
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func connCheck() bool {
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_, err := client.Read(make([]byte, 0))
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if err != nil && err != io.EOF {
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// this connection is invalid
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log.Println("conn closed....", err)
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client = nil
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return false
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}
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return true
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}
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func IsClientConnected() bool {
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return client != nil
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}
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func closeClient() {
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if client != nil {
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client.Close()
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client = nil
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}
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}
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func StopSocketServer() {
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if IsClientConnected() {
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client.Close()
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}
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if server != nil {
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server.Close()
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}
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}
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