[BAEL-1753] Cleanup code

kotlin-ktor/.gitignore

@@ -7,6 +7,7 @@
 #ignore build and generated files
 build/
 node/
+out/
 
 #ignore installed node modules and package lock file
 node_modules/

kotlin-ktor/build.gradle

@@ -37,7 +37,7 @@ repositories {
 dependencies {
     compile "io.ktor:ktor-server-netty:$ktor_version"
     compile "ch.qos.logback:logback-classic:1.2.1"
-    compile "com.google.code.gson:gson:2.8.1"
+    compile "io.ktor:ktor-gson:$ktor_version"
     testCompile group: 'junit', name: 'junit', version: '4.12'
 
 }

kotlin-ktor/resources/application.conf

@@ -1,5 +0,0 @@
-ktor {
-    application {
-        modules = [ io.ktor.samples.HelloKt.main ]
-    }
-}

kotlin-ktor/src/main/kotlin/APIServer.kt

@@ -1,12 +1,16 @@
 @file:JvmName("APIServer")
 
-import com.google.gson.Gson
+
+
 import io.ktor.application.call
 import io.ktor.application.install
 import io.ktor.features.CallLogging
+import io.ktor.features.ContentNegotiation
 import io.ktor.features.DefaultHeaders
+import io.ktor.gson.gson
 import io.ktor.http.ContentType
 import io.ktor.request.path
+import io.ktor.response.respond
 import io.ktor.response.respondText
 import io.ktor.routing.get
 import io.ktor.routing.routing
@@ -14,6 +18,7 @@ import io.ktor.server.engine.embeddedServer
 import io.ktor.server.netty.Netty
 import org.slf4j.event.Level
 
+data class Author(val name: String, val website: String)
 fun main(args: Array<String>) {
 
     val jsonResponse = """{
@@ -22,7 +27,6 @@ fun main(args: Array<String>) {
             "description": "Pay water bill today",
         }"""
 
-    data class Author(val name: String, val website: String)
 
     embeddedServer(Netty, 8080) {
         install(DefaultHeaders) {
@@ -33,15 +37,18 @@ fun main(args: Array<String>) {
             filter { call -> call.request.path().startsWith("/todo") }
             filter { call -> call.request.path().startsWith("/author") }
         }
+        install(ContentNegotiation) {
+            gson {
+                setPrettyPrinting()
+            }
+        }
         routing {
             get("/todo") {
                 call.respondText(jsonResponse, ContentType.Application.Json)
             }
             get("/author") {
                 val author = Author("baeldung", "baeldung.com")
-                val gson = Gson()
+                call.respond(author)
-                val json = gson.toJson(author)
-                call.respondText(json, ContentType.Application.Json)
 
             }