Servers Kotlin Ryan Harter @rharter Ktor Ktor Easy to use, fun - - PowerPoint PPT Presentation

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Servers Kotlin Ryan Harter @rharter Ktor Ktor Easy to use, fun - - PowerPoint PPT Presentation

Aug 29, 2023 21 likes •1.53k views

Servers Kotlin Ryan Harter @rharter Ktor Ktor Easy to use, fun and asynchronous. Ktor Easy to use, fun and asynchronous. Composable, DSL based web services in Kotlin Ktor Application Ktor Application Tomcat Servlet Netty Jetty

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Servers ❤ Kotlin

Ryan Harter @rharter

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Ktor

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Ktor

Easy to use, fun and asynchronous.

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Ktor

Easy to use, fun and asynchronous. Composable, DSL based web services in Kotlin

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Ktor

Application

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Ktor

Application Jetty Netty Tomcat Servlet

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Ktor

Application Feature Feature Feature Feature Servlet

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Ktor

Application Feature Feature Feature Feature Routing HTML Templates Serialization Authentication Servlet

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Ktor

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Ktor

Verify

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Ktor

Verify Admin

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call.respond("Hello World") post("/verify") { routing { fun Application.verify() { } } }

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call.respond("Hello World") post("/verify") { routing { fun Application.verify() { } } }

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call.respond("Hello World") post("/verify") { routing { fun Application.verify() { } } }

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call.respond("Hello World") post("/verify") { routing { fun Application.verify() { } } }

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call.respond("Hello World") post("/verify") { routing { fun Application.verify() { } } }

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SLIDE 17 → curl -X POST -d '' http://localhost:8080/verify
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SLIDE 18 → curl -X POST -d '' http://localhost:8080/verify Hello World
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Typed Responses

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call.respond("Hello World") post("/verify") { routing { fun Application.verify() { } } }

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call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String)

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SLIDE 22 → curl -X POST -d '' http://localhost:8080/verify
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SLIDE 23 → curl -X POST -d '' http://localhost:8080/verify →
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call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String)

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call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(StatusPages)

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call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(StatusPages) { } exception<Throwable> { e -> }

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call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(StatusPages) { } exception<Throwable> { e -> call.respondText(e.localizedMessage, ContentType.Text.Plain, HttpStatusCode.InternalServerError) }

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call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(StatusPages) { } exception<Throwable> { e -> call.respondText(e.localizedMessage, ContentType.Text.Plain, HttpStatusCode.InternalServerError) }

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SLIDE 29 → curl -X POST -d '' http://localhost:8080/verify
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SLIDE 30 → curl -X POST -d '' http://localhost:8080/verify Cannot transform this request's content to class com.ryanharter.example.Response
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call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(StatusPages) { } exception<Throwable> { e -> call.respondText(e.localizedMessage, ContentType.Text.Plain, HttpStatusCode.InternalServerError) }

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install(StatusPages) { }1 call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) ...

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call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(ContentNegotiation)

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install(StatusPages) { }1 ...

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call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(ContentNegotiation)

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install(StatusPages) { }1 ...

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{ }2

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call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(ContentNegotiation)

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install(StatusPages) { }1 ...

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{ }2 moshi()

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call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(ContentNegotiation)

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install(StatusPages) { }1 ...

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{ }2 moshi()

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@JsonClass(generateAdapter = true)

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call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(ContentNegotiation) install(StatusPages) { }1 ... { }2 moshi() @JsonClass(generateAdapter = true)

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SLIDE 38 → curl -X POST -d '' http://localhost:8080/verify
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SLIDE 39 → curl -X POST -d '' http://localhost:8080/verify {"status":"OK"}
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call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(ContentNegotiation) install(StatusPages) { }1 ... { }2 moshi() @JsonClass(generateAdapter = true)

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call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(ContentNegotiation) install(StatusPages) { }1 ... { }2 @JsonClass(generateAdapter = true) ...

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Typed Requests

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call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(ContentNegotiation) install(StatusPages) { }1 ... { }2 @JsonClass(generateAdapter = true) ...

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call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(ContentNegotiation) install(StatusPages) { }1 ... { }2 @JsonClass(generateAdapter = true) ...

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@JsonClass(generateAdapter = true) data class Request( val userId: String, val packageName: String, val productId: String, val token: String )b

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call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(ContentNegotiation) install(StatusPages) { }1 ... { }2 @JsonClass(generateAdapter = true) ... @JsonClass(generateAdapter = true) data class Request( val userId: String, val packageName: String, val productId: String, val token: String )b

≈ ≈ ≈ bird

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@JsonClass(generateAdapter = true) data class Request( val userId: String, val packageName: String, val productId: String, val token: String )b post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(ContentNegotiation) install(StatusPages) { }1 ... { }2 @JsonClass(generateAdapter = true) ...

≈ ≈ ≈ bird

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@JsonClass(generateAdapter = true) data class Request( val userId: String, val packageName: String, val productId: String, val token: String )b post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(ContentNegotiation) install(StatusPages) { }1 ... { }2 @JsonClass(generateAdapter = true) ...

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val request = call.receive<Request>()

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@JsonClass(generateAdapter = true) data class Request( val userId: String, val packageName: String, val productId: String, val token: String )b post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(ContentNegotiation) install(StatusPages) { }1 ... { }2 @JsonClass(generateAdapter = true) ...

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val request = call.receive<Request>()

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call.respond(request)

bird

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@JsonClass(generateAdapter = true) data class Request( val userId: String, val packageName: String, val productId: String, val token: String )b post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(ContentNegotiation) install(StatusPages) { }1 ... { }2 @JsonClass(generateAdapter = true) ... val request = call.receive<Request>() call.respond(request)

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SLIDE 52 →
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SLIDE 53 → cat << EOF >> /tmp/request.json
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SLIDE 54 → cat << EOF >> /tmp/request.json > { > "userId": "rharter", > "packageName": "com.pixite.pigment", > "productId": "com.pixite.pigment.subscription.monthly_t", > "token": “fpljlfogiejllhkebmjkpndm.AO-Oy5r83Kzef5afyMfL0suZM11l76cp_WdnWgOz... > } > EOF →
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SLIDE 55 →
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SLIDE 56 → curl -X POST —H "Content-Type: application/json" -d @/tmp/request.json \ http://localhost:8080/verify
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SLIDE 57 → curl -X POST -H "Content-Type: application/json" -d @/tmp/request.json \ http://localhost:8080/verify {“userId”:”rharter","packageName":"com.pixite.pigment","productId":"com.pixite.pigment.subscription.monthly_t", "token":"fpljlfogiejllhkebmjkpndm.AO-J1Oy5r83Kzef5afyMfL0suZM11l76cp_WdnWgOz..."}
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@JsonClass(generateAdapter = true) data class Request( val userId: String, val packageName: String, val productId: String, val token: String )b post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(ContentNegotiation) install(StatusPages) { }1 ... { }2 @JsonClass(generateAdapter = true) ... val request = call.receive<Request>() call.respond(request)

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@JsonClass(generateAdapter = true) data class Request( val userId: String, val packageName: String, val productId: String, val token: String )b post("/verify") { routing { fun Application.verify() { } } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 @JsonClass(generateAdapter = true) ... val request = call.receive<Request>() call.respond(request) ???

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External Components

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@JsonClass(generateAdapter = true) data class Request( val userId: String, val packageName: String, val productId: String, val token: String )b post("/verify") { routing { fun Application.verify() { } } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 @JsonClass(generateAdapter = true) ... val request = call.receive<Request>() call.respond(request) ???

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@JsonClass(generateAdapter = true) data class Request( val userId: String, val packageName: String, val productId: String, val token: String )b post("/verify") { routing { fun Application.verify() { } } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 @JsonClass(generateAdapter = true) ... val request = call.receive<Request>() call.respond(request) // Find valid subscription in db or remotely

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@JsonClass(generateAdapter = true) data class Request( val userId: String, val packageName: String, val productId: String, val token: String )b post("/verify") { routing { fun Application.verify() { } } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 @JsonClass(generateAdapter = true) ... val request = call.receive<Request>() // Find valid subscription in db or remotely // Save to database

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// Return subscription or 404 @JsonClass(generateAdapter = true) data class Request( val userId: String, val packageName: String, val productId: String, val token: String )b post("/verify") { routing { fun Application.verify() { } } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... val request = call.receive<Request>() // Find valid subscription in db or remotely // Save to database

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interface Api { suspend fun findSubscription(userId: String, packageName: String, productId: String, token: String): Subscription? }

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class PlayStore(serviceAccountFile: InputStream) : Store { private val publisher: AndroidPublisher by lazy {...} suspend fun findSubscription(userId: String, packageName: String, productId: String, token: String): Subscription? = coroutineScope { val response = async { publisher.purchases() .subscriptions() .get(packageName, productId, token) .execute() } response.await().asSubscription(ownerId, token) } }

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class PlayStore(serviceAccountFile: InputStream) : Store { private val publisher: AndroidPublisher by lazy {...} suspend fun findSubscription(userId: String, packageName: String, productId: String, token: String): Subscription? = coroutineScope { val response = async { publisher.purchases() .subscriptions() .get(packageName, productId, token) .execute() } response.await().asSubscription(ownerId, token) } }

class top class bottom

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class PlayStore(serviceAccountFile: InputStream) : Store { private val publisher: AndroidPublisher by lazy {...} suspend fun findSubscription(userId: String, packageName: String, productId: String, token: String): Subscription? = coroutineScope { val response = async { publisher.purchases() .subscriptions() .get(packageName, productId, token) .execute() } response.await().asSubscription(ownerId, token) } }

class top class bottom

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interface Database { suspend fun subscription(subscriptionId: String): Subscription? suspend fun subscriptionByToken(token: String): Subscription? suspend fun subscriptionByUserId(userId: String): Subscription? suspend fun createSubscription(subscription: Subscription): Subscription }

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// Return subscription or 404 @JsonClass(generateAdapter = true) data class Request( val userId: String, val packageName: String, val productId: String, val token: String )b post("/verify") { routing { fun Application.verify() { } } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... val request = call.receive<Request>() // Find valid subscription in db or remotely // Save to database

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// Return subscription or 404 @JsonClass(generateAdapter = true) data class Request( val userId: String, val packageName: String, val productId: String, post("/verify") { routing { fun Application.verify() { } } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... val request = call.receive<Request>() // Find valid subscription in db or remotely // Save to database

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val api = TotallyRealApi()

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// Return subscription or 404 @JsonClass(generateAdapter = true) data class Request( val userId: String, val packageName: String, post("/verify") { routing { fun Application.verify() { } } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... val request = call.receive<Request>() // Find valid subscription in db or remotely // Save to database

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val db = InMemoryDatabase() val api = TotallyRealApi()

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// Return subscription or 404 @JsonClass(generateAdapter = true) data class Request( val userId: String, val packageName: String, post("/verify") { routing { fun Application.verify() { } } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... val request = call.receive<Request>() // Save to database

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val db = InMemoryDatabase() val api = TotallyRealApi()

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val subscription = db.subscriptionByUserId(request.userId)

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// Return subscription or 404 @JsonClass(generateAdapter = true) data class Request( val userId: String, post("/verify") { routing { fun Application.verify() { } } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... val request = call.receive<Request>()

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val db = InMemoryDatabase() val api = TotallyRealApi()

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?: api.findSubscription(request.userId, request.packageName request.productId, request.token) val subscription = db.subscriptionByUserId(request.userId)

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?: api.findSubscription(request.userId, request.packageName request.productId, request.token) // Return subscription or 404 @JsonClass(generateAdapter = true) data class Request( post("/verify") { routing { fun Application.verify() { } } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... val request = call.receive<Request>()

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val db = InMemoryDatabase() val api = TotallyRealApi()

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?.also { db.createSubscription(it) } val subscription = db.subscriptionByUserId(request.userId)

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post("/verify") { routing { fun Application.verify() { } } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... val request = call.receive<Request>()

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val db = InMemoryDatabase() val api = TotallyRealApi() val subscription = db.subscriptionByUserId(request.userId) if (subscription == null) { call.respond(HttpStatusCode.NotFound, "Subscription invalid.") } else { call.respond(subscription) } ?: api.findSubscription(request.userId, request.packageName request.productId, request.token) ?.also { db.createSubscription(it) }

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SLIDE 77 → curl -X POST -H "Content-Type: application/json" -d @valid.json http://localhost:8080/verify
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SLIDE 78 → curl -X POST -H "Content-Type: application/json" -d @valid.json http://localhost:8080/verify {“canceled":false,"expiryDate":"2018-10-12T04:35:21.000Z","id":"668245e4-b673-4258- ba7c-4b0367833e61","ownerId":"rharter","startDate":"2018-09-12T04:35:21.000Z","token":"token3"}
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SLIDE 79 → curl -X POST -H "Content-Type: application/json" -d @valid.json http://localhost:8080/verify {“canceled":false,"expiryDate":"2018-10-12T04:35:21.000Z","id":"668245e4-b673-4258- ba7c-4b0367833e61","ownerId":"rharter","startDate":"2018-09-12T04:35:21.000Z","token":"token3"} → → curl -X POST -H "Content-Type: application/json" -d @invalid.json http://localhost:8080/verify
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SLIDE 80 → curl -X POST -H "Content-Type: application/json" -d @valid.json http://localhost:8080/verify {“canceled":false,"expiryDate":"2018-10-12T04:35:21.000Z","id":"668245e4-b673-4258- ba7c-4b0367833e61","ownerId":"rharter","startDate":"2018-09-12T04:35:21.000Z","token":"token3"} → → curl -X POST -H "Content-Type: application/json" -d @invalid.json http://localhost:8080/verify Subscription invalid. →
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Templates

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post("/verify") { routing { fun Application.verify() { } } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... val request = call.receive<Request>() val db = InMemoryDatabase() val api = TotallyRealApi() val subscription = db.subscriptionByUserId(request.userId) if (subscription == null) { call.respond(HttpStatusCode.NotFound, "Subscription invalid.") } else { call.respond(subscription) } ?: api.findSubscription(request.userId, request.packageName request.productId, request.token) ?.also { db.createSubscription(it) }

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post("/verify") { routing { fun Application.verify() { } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... ... }3 ...

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get(“/subscriptions") { routing { fun Application.verify() { } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }4 ... post("/verify") { ... }3

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get(“/subscriptions") { routing { fun Application.verify() { } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }4 ... post("/verify") { ... }3 val subscriptions = db.subscriptions() call.respond(subscriptions)

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http://localhost:8080/subscriptions

[ { "id": "sub-1", "ownerId": "Bandalls", "token": "asdf98hn", "startDate": "Sep 11, 2018 11:35:21 PM", "expiryDate": "Oct 11, 2018 11:35:21 PM", "canceled": true }, { "id": "sub-2", "ownerId": "Editussion", "token": "asdf092s", "startDate": "Sep 11, 2018 11:35:21 PM", "expiryDate": "Oct 11, 2018 11:35:21 PM", "canceled": false }, { "id": "sub-3", "ownerId": "Liveltekah", "token": "gju0u0fe", "startDate": "Sep 11, 2018 11:35:21 PM", "expiryDate": "Oct 11, 2018 11:35:21 PM", "canceled": false }, { "id": "sub-4", "ownerId": "Ortspoon", "token": "diiefh48", "startDate": "Sep 11, 2018 11:35:21 PM", "expiryDate": "Oct 11, 2018 11:35:21 PM", "canceled": true }, { "id": "sub-5", "ownerId": "Reakefit", "token": "dg09uui2", http://localhost:8080/subs…
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get(“/subscriptions") { routing { fun Application.verify() { } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }4 ... post("/verify") { ... }3 val subscriptions = db.subscriptions() call.respond(subscriptions)

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install(FreeMarker) { get(“/subscriptions") { routing { fun Application.verify() { } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }4 ... post("/verify") { ... }3 val subscriptions = db.subscriptions() call.respond(subscriptions) }freemarker

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install(FreeMarker) { get(“/subscriptions") { routing { fun Application.verify() { } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }4 ... post("/verify") { ... }3 val subscriptions = db.subscriptions() call.respond(subscriptions) }freemarker templateLoader = ClassTemplateLoader( this@module.javaClass.classLoader, "templates" )

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install(FreeMarker) { get(“/subscriptions") { routing { fun Application.verify() { } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }4 ... post("/verify") { ... }3 val subscriptions = db.subscriptions() call.respond(subscriptions) }freemarker ...

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install(FreeMarker) { get(“/subscriptions") { routing { fun Application.verify() { } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }4 ... post("/verify") { ... }3 val subscriptions = db.subscriptions() call.respond( }freemarker ... subscriptions )respond

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install(FreeMarker) { get(“/subscriptions") { routing { fun Application.verify() { } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }4 ... post("/verify") { ... }3 val subscriptions = db.subscriptions() call.respond( }freemarker ... )respond FreeMarkerContent("subscriptions.ftl", mapOf("subscriptions" to )) subscriptions

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install(FreeMarker) { get(“/subscriptions") { routing { fun Application.verify() { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... ... val subscriptions = db.subscriptions() call.respond( }freemarker ... FreeMarkerContent("subscriptions.ftl", mapOf("subscriptions" to )) subscriptions } } }4 post("/verify") { ... }3 )respond

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install(FreeMarker) { get(“/subscriptions") { routing { fun Application.verify() { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... ... val subscriptions = db.subscriptions() call.respond( }freemarker ... FreeMarkerContent("subscriptions.ftl", mapOf("subscriptions" to )) subscriptions } } }4 post("/verify") { ... }3 )respond

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SLIDE 95 <html> <head> <link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons"> <link rel="stylesheet" href="https://code.getmdl.io/1.3.0/material.indigo-pink.min.css"> <script defer src="https://code.getmdl.io/1.3.0/material.min.js"></script> </head> <body> <div class="demo-layout mdl-layout mdl-js-layout mdl-layout--fixed-header"> <header class="demo-header mdl-layout__header mdl-color--grey-100 mdl-color-text--grey-600"> <div class="mdl-layout__header-row"> <span class="mdl-layout-title">Home</span> <div class="mdl-layout-spacer"></div> <div class="mdl-textfield mdl-js-textfield mdl-textfield--expandable"> <label class="mdl-button mdl-js-button mdl-button--icon" for="search"> <i class="material-icons">search</i> </label> <div class="mdl-textfield__expandable-holder"> <input class="mdl-textfield__input" type="text" id="search"> <label class="mdl-textfield__label" for="search">Enter your query...</label> </div> </div> <button class="mdl-button mdl-js-button mdl-js-ripple-effect mdl-button--icon" id="hdrbtn"> <i class="material-icons">more_vert</i> </button> <ul class="mdl-menu mdl-js-menu mdl-js-ripple-effect mdl-menu--bottom-right" for="hdrbtn"> <li class="mdl-menu__item">About</li> <li class="mdl-menu__item">Contact</li> <li class="mdl-menu__item">Legal information</li> </ul> </div> </header> <main class="mdl-layout__content mdl-color--grey-100"> <div class="mdl-grid"> <table class="mdl-data-table mdl-js-data-table mdl-data-table--selectable mdl-color--white mdl-shadow--2dp mdl-cell mdl-cell--12-col"> <thead> <tr> <th class="mdl-data-table__cell--non-numeric">Owner ID</th> <th class="mdl-data-table__cell--non-numeric">Start Date</th> <th class="mdl-data-table__cell--non-numeric">Expiry Date</th> <th class="mdl-data-table__cell--non-numeric">Cancelled</th> </tr> </thead> <tbody> <#list subscriptions as subscription> <tr> <td class="mdl-data-table__cell--non-numeric">${subscription.ownerId}</td> <td class="mdl-data-table__cell--non-numeric">${subscription.startDate?date}</td> <td class="mdl-data-table__cell--non-numeric">${subscription.expiryDate?date}</td> <td class="mdl-data-table__cell--non-numeric"> ${subscription.canceled?string('yes', 'no')} </td> </tr> </#list> </tbody> </table> </div> </main> </div> </body> </html>
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SLIDE 96

class="mdl-data-table__cell--non-numeric">Expiry Date</th> class="mdl-data-table__cell--non-numeric">Cancelled</th> bscriptions as subscription> class="mdl-data-table__cell--non-numeric">${subscription.ownerId}</td> class="mdl-data-table__cell--non-numeric">${subscription.startDate?date}</td> class="mdl-data-table__cell--non-numeric">${subscription.expiryDate?date}</td> class="mdl-data-table__cell--non-numeric"> ${subscription.canceled?string('yes', 'no')} >

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SLIDE 97 [ { "id": "sub-1", "ownerId": "Bandalls", "token": "asdf98hn", "startDate": "Sep 11, 2018 11:35:21 PM", "expiryDate": "Oct 11, 2018 11:35:21 PM", "canceled": true }, { "id": "sub-2", "ownerId": "Editussion", "token": "asdf092s", "startDate": "Sep 11, 2018 11:35:21 PM", "expiryDate": "Oct 11, 2018 11:35:21 PM", "canceled": false }, { "id": "sub-3", "ownerId": "Liveltekah", "token": "gju0u0fe", "startDate": "Sep 11, 2018 11:35:21 PM", "expiryDate": "Oct 11, 2018 11:35:21 PM", "canceled": false }, { "id": "sub-4", "ownerId": "Ortspoon", "token": "diiefh48", "startDate": "Sep 11, 2018 11:35:21 PM", "expiryDate": "Oct 11, 2018 11:35:21 PM", "canceled": true }, { "id": "sub-5", "ownerId": "Reakefit", "token": "dg09uui2",

http://localhost:8080/subscriptions

http://localhost:8080/subs…
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SLIDE 98 [ { "id": "sub-1", "ownerId": "Bandalls", "token": "asdf98hn", "startDate": "Sep 11, 2018 11:35:21 PM", "expiryDate": "Oct 11, 2018 11:35:21 PM", "canceled": true }, { "id": "sub-2", "ownerId": "Editussion", "token": "asdf092s", "startDate": "Sep 11, 2018 11:35:21 PM", "expiryDate": "Oct 11, 2018 11:35:21 PM", "canceled": false }, { "id": "sub-3", "ownerId": "Liveltekah", "token": "gju0u0fe", "startDate": "Sep 11, 2018 11:35:21 PM", "expiryDate": "Oct 11, 2018 11:35:21 PM", "canceled": false }, { "id": "sub-4", "ownerId": "Ortspoon", "token": "diiefh48", "startDate": "Sep 11, 2018 11:35:21 PM", "expiryDate": "Oct 11, 2018 11:35:21 PM", "canceled": true }, { "id": "sub-5", "ownerId": "Reakefit", "token": "dg09uui2",

http://localhost:8080/subscriptions

http://localhost:8080/subs…
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SLIDE 99

http://localhost:8080/subscriptions

http://localhost:8080/subs…
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SLIDE 100

Authentication

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SLIDE 101

}routing install(FreeMarker) { get("/subscriptions") { routing { fun Application.verify() { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... ... val subscriptions = db.subscriptions() call.respond( }freemarker ... FreeMarkerContent("subscriptions.ftl", mapOf("subscriptions" to )) subscriptions } }4 post("/verify") { ... }3 )respond

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SLIDE 102

}routing install(FreeMarker) { get("/subscriptions") { routing { fun Application.verify() { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }freemarker ... } }4 post("/verify") { ... }3 ...

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SLIDE 103

}routing install(FreeMarker) { get("/subscriptions") { routing { fun Application.verify() { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }freemarker ... } }4 post("/verify") { ... }3 ... install(Authentication)

s

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SLIDE 104

install(FreeMarker) { get("/subscriptions") { routing { fun Application.verify() { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }freemarker ... } }4 post("/verify") { ... }3 ... install(Authentication) {auth }auth }basic basic(name = "userAuth") {basic }routing

s

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SLIDE 105

install(FreeMarker) { get("/subscriptions") { routing { fun Application.verify() { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }freemarker ... } }4 post("/verify") { ... }3 ... install(Authentication) {auth }auth }basic realm = "Verifier" basic(name = "userAuth") {basic }routing

s

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SLIDE 106

}routing install(FreeMarker) { get("/subscriptions") { routing { fun Application.verify() { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }freemarker ... } }4 post("/verify") { ... }3 ... install(Authentication)

s

{auth }auth }validate }basic validate { credentials -> realm = "Verifier" basic(name = "userAuth") {basic

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SLIDE 107

}routing install(FreeMarker) { get("/subscriptions") { routing { fun Application.verify() { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }freemarker ... } }4 post("/verify") { ... }3 ... install(Authentication)

s

{auth }auth authService.authenticate(credentials.name, credentials.password) }validate }basic validate { credentials -> realm = "Verifier" basic(name = "userAuth") {basic

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SLIDE 108

}routing install(FreeMarker) { get("/subscriptions") { routing { fun Application.verify() { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }freemarker ... } }4 post("/verify") { ... }3 ... install(Authentication)

s

{auth}auth ...

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SLIDE 109

}routing install(FreeMarker) { get("/subscriptions") { routing { fun Application.verify() { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }freemarker ... } }4 post("/verify") { ... }3 ... install(Authentication) {auth}auth ...

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SLIDE 110

get("/subscriptions") { fun Application.verify() { } } }4 post("/verify") { ... }3 ... authenticate("userAuth") { } install(FreeMarker) { routing { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }freemarker ... install(Authentication) {auth}auth ...

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SLIDE 111

fun Application.verify() { get("/subscriptions") { } } }4 post("/verify") { ... }3 ... authenticate("userAuth") { } install(FreeMarker) { routing { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }freemarker ... install(Authentication) {auth}auth ...

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SLIDE 112

fun Application.verify() { } } post("/verify") { ... }3 authenticate("userAuth") { } get("/subscriptions") { val subscriptions = db.subscriptions() call.respond( FreeMarkerContent("subscriptions.ftl", mapOf("subscriptions" to subscriptions }4 )respond ) ) install(FreeMarker) { routing { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }freemarker ... install(Authentication) {auth}auth ...

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SLIDE 113

fun Application.verify() { } } post("/verify") { ... }3 authenticate("userAuth") { } get("/subscriptions") { val subscriptions = db.subscriptions() call.respond( FreeMarkerContent("subscriptions.ftl", mapOf( subscriptions }4 )respond val user = call.authentication.principal

d

"subscriptions" to ) ) install(FreeMarker) { routing { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }freemarker ... install(Authentication) {auth}auth ...

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SLIDE 114

post("/verify") { ... }3 } val subscriptions = db.subscriptions() call.respond( FreeMarkerContent("subscriptions.ftl", mapOf( subscriptions }4 )respond val user = call.authentication.principal

d

) "subscriptions" to ) , "user" to user fun Application.verify() { authenticate("userAuth") { get("/subscriptions") { install(FreeMarker) { routing { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }freemarker ... install(Authentication) {auth}auth ...

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SLIDE 115 [ { "id": "sub-1", "ownerId": "Bandalls", "token": "asdf98hn", "startDate": "Sep 11, 2018 11:35:21 PM", "expiryDate": "Oct 11, 2018 11:35:21 PM", "canceled": true }, { "id": "sub-2", "ownerId": "Editussion", "token": "asdf092s", "startDate": "Sep 11, 2018 11:35:21 PM", "expiryDate": "Oct 11, 2018 11:35:21 PM", "canceled": false }, { "id": "sub-3", "ownerId": "Liveltekah", "token": "gju0u0fe", "startDate": "Sep 11, 2018 11:35:21 PM", "expiryDate": "Oct 11, 2018 11:35:21 PM", "canceled": false }, { "id": "sub-4", "ownerId": "Ortspoon", "token": "diiefh48", "startDate": "Sep 11, 2018 11:35:21 PM", "expiryDate": "Oct 11, 2018 11:35:21 PM", "canceled": true }, { "id": "sub-5", "ownerId": "Reakefit", "token": "dg09uui2",

http://localhost:8080/subscriptions

http://localhost:8080/subs…
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SLIDE 116

http://localhost:8080/subscriptions

http://localhost:8080/subs…

Sign in

http://localhost:8080 Username Password Sign in Cancel
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SLIDE 117

http://localhost:8080/subscriptions

http://localhost:8080/subs…

Sign in

http://localhost:8080 Username Password Sign in Cancel admin
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SLIDE 118

http://localhost:8080/subscriptions

http://localhost:8080/subs…

Ryan

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SLIDE 119

Forms

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SLIDE 120

http://localhost:8080/subscriptions

http://localhost:8080/subs…

Ryan

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SLIDE 121

http://localhost:8080/subscriptions

http://localhost:8080/subs…

Ryan

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SLIDE 122

Ryan

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SLIDE 123

} } post("/verify") { ... }3 } }4

d

fun Application.verify() { authenticate("userAuth") { get("/subscriptions") { install(FreeMarker) { routing { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }freemarker ... install(Authentication) {auth}auth ... ...

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SLIDE 124

} post("/verify") { ... }3 } }4

d

authenticate("userAuth") { get("/subscriptions") { install(FreeMarker) { routing { }freemarker ... install(Authentication) {auth}auth ... ... post("/subscriptions") { }post get("/subscriptions") {

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SLIDE 125

} post("/verify") { ... }3 } }4

d

authenticate("userAuth") { get("/subscriptions") { install(FreeMarker) { routing { }freemarker ... install(Authentication) {auth}auth ... ... post("/subscriptions") { }post get("/subscriptions") { val parameters = call.receiveParameters()

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SLIDE 126

} post("/verify") { ... }3 } }4

d

authenticate("userAuth") { get("/subscriptions") { install(FreeMarker) { routing { }freemarker ... install(Authentication) {auth}auth ... ... post("/subscriptions") { }post get("/subscriptions") { val parameters = call.receiveParameters() val id = parameters[“id"] post("/subscriptions") {

end post

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SLIDE 127

} post("/verify") { ... }3 } }4

d

authenticate("userAuth") { get("/subscriptions") { install(FreeMarker) { routing { }freemarker ... install(Authentication) {auth}auth ... ... post("/subscriptions") { }post get("/subscriptions") { val parameters = call.receiveParameters() val id = parameters[“id"] ?: throw IllegalArgumentException("Missing parameter: id") post("/subscriptions") {

end post

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SLIDE 128

} post("/verify") { ... }3 } }4

d

authenticate("userAuth") { get("/subscriptions") { install(FreeMarker) { routing { }freemarker ... install(Authentication) {auth}auth ... ... post("/subscriptions") { }post get("/subscriptions") { val parameters = call.receiveParameters() val id = parameters[“id"] ?: throw IllegalArgumentException("Missing parameter: id") val action = parameters[“action"] ?: throw IllegalArgumentException("Missing parameter: action") post("/subscriptions") {

end post

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SLIDE 129

} post("/verify") { ... }3 } }4

d

authenticate("userAuth") { get("/subscriptions") { install(FreeMarker) { routing { }freemarker ... install(Authentication) {auth}auth ... ... post("/subscriptions") { }post get("/subscriptions") { val parameters = call.receiveParameters() val id = parameters[“id"] ?: throw IllegalArgumentException("Missing parameter: id") val action = parameters[“action"] ?: throw IllegalArgumentException("Missing parameter: action") when (action) { }when post("/subscriptions") { val parameters = call.receiveParameters() ids and such

end post

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SLIDE 130

} post("/verify") { ... }3 } }4

d

authenticate("userAuth") { get("/subscriptions") { install(FreeMarker) { routing { }freemarker ... install(Authentication) {auth}auth ... ... post("/subscriptions") { }post get("/subscriptions") { val parameters = call.receiveParameters() val id = parameters[“id"] ?: throw IllegalArgumentException("Missing parameter: id") val action = parameters[“action"] ?: throw IllegalArgumentException("Missing parameter: action") when (action) { }when "delete" -> db.deleteSubscription(id) post("/subscriptions") { val parameters = call.receiveParameters() ids and such

end post

when (action) {

end when

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SLIDE 131

} post("/verify") { ... }3 } }4

d

authenticate("userAuth") { get("/subscriptions") { install(FreeMarker) { routing { }freemarker ... install(Authentication) {auth}auth ... ... post("/subscriptions") { }post get("/subscriptions") { val parameters = call.receiveParameters() val id = parameters[“id"] ?: throw IllegalArgumentException("Missing parameter: id") val action = parameters[“action"] ?: throw IllegalArgumentException("Missing parameter: action") when (action) { }when "delete" -> db.deleteSubscription(id) "cancel" -> { } -> cancel post("/subscriptions") { val parameters = call.receiveParameters() ids and such

end post

when (action) { “delete” -> db.deleteSubscription(id)

end when

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SLIDE 132

} post("/verify") { ... }3 } }4

d

authenticate("userAuth") { get("/subscriptions") { install(FreeMarker) { routing { }freemarker ... install(Authentication) {auth}auth ... ... post("/subscriptions") { }post get("/subscriptions") { val parameters = call.receiveParameters() val id = parameters[“id"] ?: throw IllegalArgumentException("Missing parameter: id") val action = parameters[“action"] ?: throw IllegalArgumentException("Missing parameter: action") when (action) { }when "delete" -> db.deleteSubscription(id) "cancel" -> { db.subscription(id) } -> cancel post("/subscriptions") { val parameters = call.receiveParameters() ids and such

end post

when (action) { “delete” -> db.deleteSubscription(id)

end when

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SLIDE 133

} post("/verify") { ... }3 } }4

d

authenticate("userAuth") { get("/subscriptions") { install(FreeMarker) { routing { }freemarker ... install(Authentication) {auth}auth ... ... post("/subscriptions") { }post get("/subscriptions") { val parameters = call.receiveParameters() val id = parameters[“id"] ?: throw IllegalArgumentException("Missing parameter: id") val action = parameters[“action"] ?: throw IllegalArgumentException("Missing parameter: action") when (action) { }when "delete" -> db.deleteSubscription(id) "cancel" -> { db.subscription(id) db.putSubscription(it.copy(canceled = true)) }db.subscription(id)?.also } -> cancel ?.also { post("/subscriptions") { val parameters = call.receiveParameters() ids and such

end post

when (action) { “delete” -> db.deleteSubscription(id)

end when

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SLIDE 134

} post("/verify") { ... }3 } }4

d

authenticate("userAuth") { get("/subscriptions") { install(FreeMarker) { routing { }freemarker ... install(Authentication) {auth}auth ... ... post("/subscriptions") { val parameters = call.receiveParameters() val id = parameters[“id"] ?: throw IllegalArgumentException("Missing parameter: id") val action = parameters[“action"] ?: throw IllegalArgumentException("Missing parameter: action") when (action) { "delete" -> db.deleteSubscription(id) "cancel" -> { db.subscription(id)?.also { db.putSubscription(it.copy(canceled = true)) }db.subscription(id)?.also } -> cancel }when }post call.respondRedirect("/subscriptions") get("/subscriptions") { post("/subscriptions") { val parameters = call.receiveParameters() ids and such

end post

when (action) { “delete” -> db.deleteSubscription(id)

end when

cancel stuff

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SLIDE 135

class="mdl-data-table__cell--non-numeric">Cancelled</th> bscriptions as subscription> class="mdl-data-table__cell--non-numeric">${subscription.ownerId}</td> class="mdl-data-table__cell--non-numeric">${subscription.startDate?date}</td> class="mdl-data-table__cell--non-numeric">${subscription.expiryDate?date}</td> class="mdl-data-table__cell--non-numeric"> ${subscription.canceled?string('yes', 'no')} >

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SLIDE 136

> <td class="mdl-data-table__cell--non-numeric"> <form method="post" action="subscriptions"> <input type="hidden" name="id" value="${subscription.id}"/> <input type="hidden" name="action" value="cancel"/> <button type="submit" title="Cancel" class=“…” <#if subscription.canceled>disabled</#if>> <i class="material-icons">block</i> </button> </form> <form method="post" action="subscriptions"> <input type="hidden" name="id" value="${subscription.id}"/> <input type="hidden" name="action" value="delete"/> <button type="submit" title="Delete" class=“…”> <i class="material-icons">delete</i> </button> </form> </td>

td /td

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SLIDE 137

> <td class="mdl-data-table__cell--non-numeric"> <form method="post" action="subscriptions"> <input type="hidden" name="id" value="${subscription.id}"/> <input type="hidden" name="action" value="cancel"/> <button type="submit" title="Cancel" class=“…” <#if subscription.canceled>disabled</#if>> <i class="material-icons">block</i> </button> </form> <form method="post" action="subscriptions"> <input type="hidden" name="id" value="${subscription.id}"/> <input type="hidden" name="action" value="delete"/> <button type="submit" title="Delete" class=“…”> <i class="material-icons">delete</i> </button> </form> </td>

td /td start td End td

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SLIDE 138

> <td class="mdl-data-table__cell--non-numeric"> <form method="post" action="subscriptions"> <input type="hidden" name="id" value="${subscription.id}"/> <input type="hidden" name="action" value="cancel"/> <button type="submit" title="Cancel" class=“…” <#if subscription.canceled>disabled</#if>> <i class="material-icons">block</i> </button> </form> <form method="post" action="subscriptions"> <input type="hidden" name="id" value="${subscription.id}"/> <input type="hidden" name="action" value="delete"/> <button type="submit" title="Delete" class=“…”> <i class="material-icons">delete</i> </button> </form> </td>

td /td start td End td form content

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SLIDE 139

> <td class="mdl-data-table__cell--non-numeric"> <form method="post" action="subscriptions"> <input type="hidden" name="id" value="${subscription.id}"/> <input type="hidden" name="action" value="cancel"/> <button type="submit" title="Cancel" class=“…” <#if subscription.canceled>disabled</#if>> <i class="material-icons">block</i> </button> </form> <form method="post" action="subscriptions"> <input type="hidden" name="id" value="${subscription.id}"/> <input type="hidden" name="action" value="delete"/> <button type="submit" title="Delete" class=“…”> <i class="material-icons">delete</i> </button> </form> </td>

td /td start td End td formstart td /form td button

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SLIDE 140

> <td class="mdl-data-table__cell--non-numeric"> <form method="post" action="subscriptions"> <input type="hidden" name="id" value="${subscription.id}"/> <input type="hidden" name="action" value="cancel"/> <button type="submit" title="Cancel" class=“…” <#if subscription.canceled>disabled</#if>> <i class="material-icons">block</i> </button> </form> <form method="post" action="subscriptions"> <input type="hidden" name="id" value="${subscription.id}"/> <input type="hidden" name="action" value="delete"/> <button type="submit" title="Delete" class=“…”> <i class="material-icons">delete</i> </button> </form> </td>

td /td start td End td formstart td /form td inputs

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SLIDE 141

http://localhost:8080/subscriptions

http://localhost:8080/subs…

Ryan

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SLIDE 142

http://localhost:8080/subscriptions

http://localhost:8080/subs…

Ryan

Cancel
slide-143
SLIDE 143

http://localhost:8080/subscriptions

http://localhost:8080/subs…

Ryan

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SLIDE 144

Ryan

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SLIDE 145

Ryan

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SLIDE 146

Ktor

  • Web

http://ktor.io

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SLIDE 147

Ktor

  • Web
  • Github

http://ktor.io ktorio / ktor

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SLIDE 148

Ktor

  • Web
  • Github
  • Slack

http://ktor.io ktorio / ktor kotlinlang #ktor

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SLIDE 149

Ktor

  • Web
  • Github
  • Slack
  • Me

http://ktor.io ktorio / ktor kotlinlang #ktor @rharter

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SLIDE 150

Ktor

  • Web
  • Github
  • Slack
  • Me
  • Slides

http://ktor.io ktorio / ktor kotlinlang #ktor @rharter https://ryans.link/ktor

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SLIDE 151

Servers ❤ Kotlin

Ryan Harter @rharter