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STEP1_Basics/9_Network/Main.kt

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+package org.server
+
+import com.beust.klaxon.Klaxon
+import java.io.BufferedReader
+import java.io.InputStreamReader
+import java.io.PrintWriter
+import java.net.ServerSocket
+
+data class Person(
+    val name: String,
+    val age: Int,
+    val city: String
+)
+
+const val serverPort: Int = 12345
+
+fun main() {
+    val server = ServerSocket(serverPort)
+    println("Server started on port $serverPort...")
+
+    while (true) {
+        val client = server.accept()
+        println("Client connected: ${client.inetAddress.hostAddress}:${client.port}")
+
+        val reader = BufferedReader(InputStreamReader(client.getInputStream()))
+        val writer = PrintWriter(client.getOutputStream(), true)
+
+        val rawReceived = reader.readLine()
+        //println("Received from client: $received")
+        val json = Klaxon().parse<Person>(rawReceived)
+        println("""
+            
+            Parsed data:
+            name: ${json?.name}
+            age: ${json?.age}
+            city: ${json?.city}
+            
+        """.trimIndent())
+
+        val response = "OK"
+        writer.println(response)
+
+        client.close()
+    }
+}