Servers ❤️ Kotlin

A practical introduction of building an In App Purchase verification server backend with Kotlin using Ktor from JetBrains.

Transcript

1. Servers ❤ Kotlin Ryan Harter @rharter
2. Ktor
3. Ktor Easy to use, fun and asynchronous.
4. Ktor Easy to use, fun and asynchronous. Composable, DSL based web services in Kotlin
5. Ktor Application
6. Ktor Application Jetty Netty Tomcat Servlet
7. Ktor Application Feature Feature Feature Feature Servlet
8. Ktor Application Feature Feature Feature Feature Routing HTML Templates Serialization Authentication Servlet
9. Ktor
10. Ktor Verify
11. Ktor Verify Admin
12. call.respond("Hello World") post("/verify") { routing { fun Application.verify() { } } }
13. call.respond("Hello World") post("/verify") { routing { fun Application.verify() { } } }
14. call.respond("Hello World") post("/verify") { routing { fun Application.verify() { } } }
15. call.respond("Hello World") post("/verify") { routing { fun Application.verify() { } } }
16. call.respond("Hello World") post("/verify") { routing { fun Application.verify() { } } }
17. → curl -X POST -d '' http://localhost:8080/verify
18. → curl -X POST -d '' http://localhost:8080/verify Hello World
19. Typed Responses
20. call.respond("Hello World") post("/verify") { routing { fun Application.verify() { } } }
21. call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String)
22. → curl -X POST -d '' http://localhost:8080/verify
23. → curl -X POST -d '' http://localhost:8080/verify →
24. call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String)
25. call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(StatusPages)
26. call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(StatusPages) { } exception<Throwable> { e -> }
27. 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) }
28. 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) }
29. → curl -X POST -d '' http://localhost:8080/verify
30. → curl -X POST -d '' http://localhost:8080/verify Cannot transform this request's content to class com.ryanharter.example.Response
31. 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) }
32. install(StatusPages) { }1 call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) ...
33. call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(ContentNegotiation) ≈ install(StatusPages) { }1 ... ≈
34. call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(ContentNegotiation) ≈ install(StatusPages) { }1 ... ≈ { }2
35. call.respond(Response(status = "OK")) post("/verify") { routing { fun Application.verify() { } } } data class Response(val status: String) install(ContentNegotiation) ≈ install(StatusPages) { }1 ... ≈ { }2 moshi() ≈ ≈
36. 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)
37. 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)
38. → curl -X POST -d '' http://localhost:8080/verify
39. → curl -X POST -d '' http://localhost:8080/verify {"status":"OK"}
40. 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)
41. 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) ...
42. Typed Requests
45. 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) ...
46. 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
47. 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
48. @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
49. @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>() ≈ ≈ bird
50. @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) bird
51. @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)
52. →
53. → cat << EOF >> /tmp/request.json
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 →
55. →
56. → curl -X POST —H "Content-Type: application/json" -d @/tmp/request.json \ http://localhost:8080/verify
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.pig ment.subscription.monthly_t","token":"fpljlfogiejllhkebmjkpndm.AO- J1Oy5r83Kzef5afyMfL0suZM11l76cp_WdnWgOz..."}
58. @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)
59. @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>() call.respond(request) ???
60. External Components
61. @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>() call.respond(request) ???
62. @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>() call.respond(request) // Find valid subscription in db or remotely ≈ ≈
63. @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 ≈ ≈
64. // 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 ≈ ≈
65. interface Api { suspend fun findSubscription(userId: String, packageName: String, productId: String, token: String): Subscription? }
66. 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) } }
67. 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
68. 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
69. 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 }
70. // 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
71. // 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 ≈ ≈ ≈ val api = TotallyRealApi() ≈ ≈ ≈
72. // 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>() // Find valid subscription in db or remotely // Save to database ≈ ≈ ≈ val db = InMemoryDatabase() val api = TotallyRealApi() ≈ ≈ ≈
73. // 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>() // Save to database ≈ ≈ ≈ val db = InMemoryDatabase() val api = TotallyRealApi() ≈ ≈ val subscription = db.subscriptionByUserId(request.userId)
74. // 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>() ≈ ≈ val db = InMemoryDatabase() val api = TotallyRealApi() ≈ ?: api.findSubscription(request.userId, request.packageName request.productId, request.token) val subscription = db.subscriptionByUserId(request.userId)
75. ?: 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>() ≈ ≈ val db = InMemoryDatabase() val api = TotallyRealApi() ≈ ?.also { db.createSubscription(it) } val subscription = db.subscriptionByUserId(request.userId)
76. 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) }
77. → curl -X POST -H "Content-Type: application/json" -d @valid.json http://localhost:8080/verify
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"}
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
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. →
81. Templates
82. 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) }
83. post("/verify") { routing { fun Application.verify() { } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... ... }3 ...
84. get(“/subscriptions") { routing { fun Application.verify() { } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }4 ... post("/verify") {... }3
85. get(“/subscriptions") { routing { fun Application.verify() { } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }4 ... post("/verify") {... }3 val subscriptions = db.subscriptions() call.respond(subscriptions)
86. 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…
87. get(“/subscriptions") { routing { fun Application.verify() { } } install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }4 ... post("/verify") {... }3 val subscriptions = db.subscriptions() call.respond(subscriptions)
88. 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
89. 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" )
90. 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 ...
91. 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
92. 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
93. 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
94. 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
95. <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"> ${subscription.canceled?string('yes', 'no')} </td> </tr> </#list> </tbody> </table> </div> </main> </div>
96. <th class="mdl-data-table__cell--non-numeric">Start Date</th> <th class="mdl-data-table__cell--non-numeric">Expiry Date</th> <th class="mdl-data-table__cell--non-numeric">Cancelled</th> </tr> </thead> <tbody> <#list subscriptions as subscription> <tr> <td class="mdl-data-table__cell--non-numeric">${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> >
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…
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…
99. http://localhost:8080/subscriptions http://localhost:8080/subs…
100. Authentication
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
102. }routing install(FreeMarker) { get("/subscriptions") { routing { fun Application.verify() { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }freemarker ... } }4 post("/verify") {... }3 ...
103. }routing install(FreeMarker) { get("/subscriptions") { routing { fun Application.verify() { install(ContentNegotiation) install(StatusPages) { }1 ... { }2 ... }freemarker ... } }4 post("/verify") {... }3 ... install(Authentication) s
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
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
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
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
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
114. } 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 ...
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…
116. http://localhost:8080/subscriptions http://localhost:8080/subs… Sign in http://localhost:8080 Username Password Sign in Cancel
117. http://localhost:8080/subscriptions http://localhost:8080/subs… Sign in http://localhost:8080 Username Password Sign in Cancel admin •••••••••••
118. http://localhost:8080/subscriptions http://localhost:8080/subs… Ryan
119. Forms
120. http://localhost:8080/subscriptions http://localhost:8080/subs… Ryan
121. http://localhost:8080/subscriptions http://localhost:8080/subs… Ryan
122. Ryan
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 ... ...
124. post("/verify") {... }3 } }4 authenticate("userAuth") { get("/subscriptions") { install(FreeMarker) { routing { }freemarker ... install(Authentication) {auth }auth ... ... post("/subscriptions") { }post get("/subscriptions") {
125. post("/verify") {... }3 } }4 authenticate("userAuth") { get("/subscriptions") { install(FreeMarker) { routing { }freemarker ... install(Authentication) {auth }auth ... ... post("/subscriptions") { }post get("/subscriptions") { val parameters = call.receiveParameters()
126. post("/verify") {... }3 } }4 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
127. post("/verify") {... }3 } }4 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
128. post("/verify") {... }3 } }4 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
129. post("/verify") {... }3 } }4 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
130. post("/verify") {... }3 } }4 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
131. post("/verify") {... }3 } }4 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
132. post("/verify") {... }3 } }4 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
133. post("/verify") {... }3 } }4 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
134. post("/verify") {... }3 } }4 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
135. <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> >
136. <td class="mdl-data-table__cell--non-numeric"> ${subscription.canceled?string('yes', 'no')} </td> </tr> </#list> </tbody> <td class="mdl-data-table__cell--non-numeric"> <form method="post" action="subscriptions"> <input type="hidden" name="id" value="${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
137. <td class="mdl-data-table__cell--non-numeric"> ${subscription.canceled?string('yes', 'no')} </td> </tr> </#list> </tbody> <td class="mdl-data-table__cell--non-numeric"> <form method="post" action="subscriptions"> <input type="hidden" name="id" value="${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
138. <td class="mdl-data-table__cell--non-numeric"> ${subscription.canceled?string('yes', 'no')} </td> </tr> </#list> </tbody> <td class="mdl-data-table__cell--non-numeric"> <form method="post" action="subscriptions"> <input type="hidden" name="id" value="${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
139. <td class="mdl-data-table__cell--non-numeric"> ${subscription.canceled?string('yes', 'no')} </td> </tr> </#list> </tbody> <td class="mdl-data-table__cell--non-numeric"> <form method="post" action="subscriptions"> <input type="hidden" name="id" value="${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
140. <td class="mdl-data-table__cell--non-numeric"> ${subscription.canceled?string('yes', 'no')} </td> </tr> </#list> </tbody> <td class="mdl-data-table__cell--non-numeric"> <form method="post" action="subscriptions"> <input type="hidden" name="id" value="${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
141. http://localhost:8080/subscriptions http://localhost:8080/subs… Ryan
142. http://localhost:8080/subscriptions http://localhost:8080/subs… Ryan Cancel
143. http://localhost:8080/subscriptions http://localhost:8080/subs… Ryan
144. Ryan
145. Ryan
146. Ktor • Web • Github • Slack http://ktor.io ktorio / ktor kotlinlang #ktor
147. Ktor • Web • Github • Slack • Me http://ktor.io ktorio / ktor kotlinlang #ktor @rharter
148. Servers ❤ Kotlin Ryan Harter @rharter