# Ktor Published articles for Ktor. This is one page of public article previews, not the complete archive. Follow Next page to continue. Summaries are not the original full articles. ## Media3 1.11 adds customizable Compose player controls, gestures, and video preloading DevFeed: [Media3 1.11 adds customizable Compose player controls, gestures, and video preloading]() Original publisher: [Read original article]() Author: Android Developers (noreply@blogger.com) Published: 2026-08-11T16:00:00Z Content type: release Language: en Sources: [Android Developers Blog]() Topics: [media3](), [Compose](), [Jetpack Compose](), [Playback](), [Android](), [ExoPlayer](), [Ktor]() Tags: [android](), [audio](), [compose](), [compose-ui](), [exoplayer](), [jetpack](), [jetpack-compose](), [ktor](), [media](), [media3](), [playback](), [release](), [releases](), [video]() ### AI overview Android Media3 1.11 introduces customizable Jetpack Compose player layouts, gesture-based playback controls, player recycling and preloading for short-form video feeds, improved Cast integration, a Ktor HTTP client extension, and new Ogg and WAV muxing utilities. ### Source excerpt Posted by Toni Heidenreich, Software Engineer, Android Media3 1.11 is out. Powering the vast majority of top Android media apps, this release brings new features, bug fixes, and improvements across playback, editing, and UI components. We're expanding our Jetpack Compose UI modules with customizable Player slots and easy to use defaults, interactive gestures, state observers, and short-form video preloading using PlayerPool. We also modernized the Media3 Cast integration with SystemUI Output Switcher support, introduced a new Ktor HTTP client network extension, and added new muxing utilities for Ogg and WAV files. Read on for key highlights, and check out the full release notes for a comprehensive list of changes. Playback UI and Compose With Android becoming Compose-first, we are continuing to expand the media3-ui-compose and media3-ui-compose-material3 modules. This update introduces more granular control over your player layout, richer interaction patterns, and deeper integration with Material3. Customizable Player layout The Material 3 Player Composable now supports dedicated content slots for topControls, centerControls, bottomControls, and errorOverlay. You can drop in your own Composables or use the ready-made defaults published in PlayerDefaults: Player( player = player, topControls = { PlayerDefaults.TopControls(player) }, centerControls = { PlayerDefaults.CenterControls(player) }, bottomControls = { PlayerDefaults.BottomControls(player) }, ) The Player Composable also integrates FocusRequester support, enabling seamless D-pad and keyboard navigation on Android TV, foldables, and desktop environments. Example for a Composable Player with customized controls Gestures and playback speed control PlaybackSpeedState now provides a fast-forward/slow-motion API. The demo-compose app showcases this with a long-press gesture to fast-forward playback and seeking with double tap. Combined with the ProgressSlider introduced in 1.10, the Compose player UI now offers ric ## Practical Kotlin Multiplatform: Implementing the Firebase Sign-up Operation with Ktor DevFeed: [Practical Kotlin Multiplatform: Implementing the Firebase Sign-up Operation with Ktor]() Original publisher: [Read original article]() Author: hitherejoe Published: 2026-07-26T07:37:53Z Content type: tutorial Language: en Sources: [Joe Birch]() Topics: [Kotlin Multiplatform](), [Firebase](), [Ktor](), [Authentication](), [Android](), [interfaces](), [iOS](), [Exception]() Tags: [android](), [authentication](), [code](), [exception](), [firebase](), [interfaces](), [ios](), [jetpack-compose](), [kotlin](), [kotlin-multiplatform](), [ktor](), [multiplatform]() ### AI overview A tutorial on implementing a Firebase sign-up API request in a Kotlin Multiplatform application using Ktor. It defines an authentication repository interface and service implementation for Android and iOS clients, including API key, email, and password parameters and exception handling. ### Source excerpt This post is part four of a series adapted from Practical KMP, my book on building production Kotlin Multiplatform apps for Android and iOS. Part two built the authentication remote store and modelled its response. Implementing the Sign-up Endpoint Now that we've created the models for receiving back an authentication response, it's time for us... Continue reading -> ## Practical Kotlin Multiplatform: Creating the Firebase Auth Remote Store with Ktor DevFeed: [Practical Kotlin Multiplatform: Creating the Firebase Auth Remote Store with Ktor]() Original publisher: [Read original article]() Author: hitherejoe Published: 2026-07-18T15:17:19Z Content type: tutorial Language: en Sources: [Joe Birch]() Topics: [Kotlin Multiplatform](), [Authentication](), [Firebase](), [Ktor](), [Android](), [HTTP](), [iOS]() Tags: [android](), [api](), [authentication](), [firebase](), [ios](), [jetpack-compose](), [kotlin](), [kotlin-multiplatform](), [ktor](), [networking](), [tests]() ### AI overview This tutorial, part two of a Kotlin Multiplatform series, explains how to build a Firebase Authentication remote store with Ktor. It models Firebase Authentication's REST API behind a shared interface for Android and iOS, covering account operations, token refresh, dependency injection, and tests with a mocked client. ### Source excerpt This post is part two of a series adapted from Practical KMP, my book on building production Kotlin Multiplatform apps for Android and iOS. If you missed it, part one covered setting up the shared networking module. Introduction With our shared module now set up, we have the foundations that we need to start building... Continue reading -> ## Practical Kotlin Multiplatform: Setting up the Kotlin Multiplatform Networking Module with Ktor DevFeed: [Practical Kotlin Multiplatform: Setting up the Kotlin Multiplatform Networking Module with Ktor]() Original publisher: [Read original article]() Author: hitherejoe Published: 2026-07-10T16:16:31Z Content type: tutorial Language: en Sources: [Joe Birch]() Topics: [Kotlin Multiplatform](), [Kotlin](), [Ktor](), [networking](), [REST API](), [Authentication](), [Firebase](), [Gradle](), [implementation](), [Android](), [iOS]() Tags: [android](), [android-app-development](), [android-development](), [androiddev](), [app-development](), [authentication](), [firebase](), [gradle](), [implementation](), [ios](), [jetpack-compose](), [kotlin](), [kotlin-multiplatform](), [ktor](), [library](), [mobile-app-development](), [module](), [networking](), [rest-api]() ### AI overview A tutorial series installment that sets up a Kotlin Multiplatform networking module with Ktor for shared Android and iOS code. It describes building a portable Firebase Authentication and Firestore REST API layer without relying on platform-specific SDKs. ### Source excerpt This post is part one of a series adapted from Practical KMP, my book on building production Kotlin Multiplatform apps for Android and iOS. Part 1: Creating the Kotlin Multiplatform Module In this part of the book, we'll build the complete authentication remote store, defining a repository that handles every operation our app needs for... Continue reading -> ## Let Koin Shape your Application Architecture DevFeed: [Let Koin Shape your Application Architecture]() Original publisher: [Read original article]() Author: Gabriel Bronzatti Moro Published: 2026-07-06T12:01:01Z Content type: tutorial Language: en Sources: [Koin developers - Medium]() Topics: [Architecture & Design](), [Software Engineering](), [coding](), [Software](), [Ktor]() Tags: [architecture](), [clean-architecture](), [developer](), [koin](), [kotlin](), [ktor](), [software](), [software-architecture](), [software-design]() ### AI overview This tutorial explains how Koin can support application architecture based on Clean Architecture and software design practices. It describes using Koin to create and manage object instances, including singleton and factory definitions, with Ktor's HttpClient as an example. ### Source excerpt Hey, friends! 👋 Today we're going to explore application architecture and how Koin can help us build scalable, maintainable applications by applying the principles of Clean Architecture and other software design best practices. Application architecture is a fundamental skill for every software engineer. A well-designed architecture makes applications easier to understand, test, extend, and maintain as they grow over time. A collection of LEGO towers in various stages of construction -- Unsplash by richard_heFoundation When we think about software architecture, we often picture layered diagrams -- data, domain, and presentation -- along with classes such as use cases, handlers, repositories, and helpers. But how do all these components work together? How do we establish a reliable communication protocol between them? Architecture is more than just organizing classes into packages. It's about defining how objects communicate and collaborate working toward a common goal. With that in mind, let's begin our journey with a simple principle: Every object instance should be created by Koin. My only responsibility as a developer is to describe how each object should be instantiated, while Koin takes care of the creation process.SingletonSingleton Café generated by ChatGPT Koin makes it easy to define singletons, whether you're using the @Single annotation or the single { ... } DSL. By declaring a singleton, you're telling Koin to create and manage a single instance of that object for the lifetime of the application. In the example below, we define an HttpClient as a singleton: @Module class NetworkModule { @Single fun provideHttpClient(): HttpClient { return HttpClientBuilder.build( baseUrl = BuildKonfig.HOST, ) } ... } HttpClient is a class provided by Ktor, and it should typically be instantiated only once. By declaring it as a singleton, Koin ensures that the same HttpClient instance is shared throughout the application. The Singleton pattern is commonly used for objects tha ## Kotlin in 3 minutes DevFeed: [Kotlin in 3 minutes]() Original publisher: [Read original article]() Published: 2026-05-25T00:00:00Z Content type: tutorial Language: en Sources: [Kt. Academy]() Topics: [Kotlin](), [Programming](), [multiplatform](), [Java](), [compose-multiplatform](), [Ktor](), [Spring Boot]() Tags: [compiler](), [compose-multiplatform](), [java](), [kotlin](), [ktor](), [multiplatform](), [null-safety](), [spring-boot](), [workshop-learning-programming]() ### AI overview A concise overview of Kotlin covering its interoperability with Java, compilation to JVM bytecode, JavaScript, and native platforms, and its use across Android, backend, iOS, desktop, and web development. It also introduces Kotlin's type inference and null-safety features. ### Source excerpt The essence of Kotlin, what is it and why it gets so popular. ## Deconstructing OkHttp DevFeed: [Deconstructing OkHttp]() Original publisher: [Read original article]() Author: Jesse Wilson Published: 2026-05-22T12:00:00Z Content type: article Language: en Sources: [Public Object]() Topics: [Library](), [Network](), [Code](), [Kotlin](), [implementation](), [Cache](), [certificates]() Tags: [architecture](), [cache](), [certificates](), [https](), [implementation](), [kotlinconf](), [ktor](), [library](), [network](), [okhttp](), [performance](), [presentation](), [retrofit](), [testing]() ### AI overview A KotlinConf talk examines OkHttp's implementation rather than its basic usage, covering interceptor-based architecture, connection lifecycles, cache state machines, URL decoders, HTTPS testing certificates, performance, and extension mechanisms. ### Source excerpt I presented this at KotlinConf on May 22, 2026. Also available on slides, YouTube, and Speaker Deck. OkHttp is a popular library for making network calls. You might use it directly, or with Ktor, Retrofit, Coil, or gRPC. But this is not a talk on how to use OkHttp. Instead, ## Opinionated Ktor Services DevFeed: [Opinionated Ktor Services]() Original publisher: [Read original article]() Author: Simon Vergauwen Published: 2026-05-21T00:00:00Z Content type: opinion Language: en Sources: [nomisRev]() Topics: [Ktor](), [Kotlin]() Tags: [2026](), [conference](), [kotlin](), [kotlinconf](), [ktor](), [microservices](), [opinions](), [services](), [talk]() ### AI overview The author describes a KotlinConf 2026 talk about using Ktor and the Kotlin ecosystem to build robust, maintainable, and scalable services. The talk presents the author's opinions on structuring Ktor services and choosing libraries, based on experience with teams. ### Source excerpt Today I gave a talk at KotlinConf 2026 in Munich about "Opinionated Ktor Services". In this talk, I shared my experience and opinions on how to build robust, maintainable, and scalable services using Ktor and the Kotlin ecosystem. ## From HTTP MCP to stdio: Lessons Connecting an AI Agent to a Desktop IDE DevFeed: [From HTTP MCP to stdio: Lessons Connecting an AI Agent to a Desktop IDE]() Original publisher: [Read original article]() Author: Eugene Petrenko Published: 2026-05-20T00:00:00Z Content type: article Language: en Sources: [Eugene Petrenko]() Topics: [Model Context Protocol](), [IntelliJ IDEA](), [AI Agent](), [Command-line interface](), [Cross-origin resource sharing (CORS)]() Tags: [agentic-coding](), [ai-agent](), [ai-agents](), [ai-coding](), [architecture](), [claude](), [cli](), [codex](), [devrig](), [docker-image](), [eugene-petrenko](), [integration-test](), [intellij](), [jonnyzzz](), [kotlin](), [ktor](), [mcp](), [mcp-steroid](), [report](), [tag-41199d53f463]() ### AI overview This article explains why an HTTP MCP server embedded in a desktop IntelliJ application proved unreliable on real workstations. It describes moving to stdio with a CLI coordinator called devrig, and emphasizes integration tests for the MCP layer, including issues involving dynamic ports, startup ordering, multiple IDEs, and mismatched transport support. ### Source excerpt The obvious way to connect an AI Agent to a running IntelliJ is an HTTP MCP server inside the IDE. I built it, shipped it, and used it daily -- and it kept breaking on real workstations: dynamic ports, start-order lottery, multiple IDEs, and the agent-up/IDE-down dead end. Here is why I moved the whole thing to stdio and a CLI coordinator called devrig, and what the journey taught me. ## Metro DI for Ktor Backend: From a God Object through manual DI to Constructor Injection DevFeed: [Metro DI for Ktor Backend: From a God Object through manual DI to Constructor Injection]() Original publisher: [Read original article]() Author: FunkyMuse Published: 2026-05-15T15:35:00Z Content type: tutorial Language: en Sources: [FunkyMuse]() Topics: [Ktor](), [Back end](), [modules]() Tags: [backend](), [constructor](), [dependencies](), [di](), [gradle](), [kotlin](), [ktor](), [redis](), [server](), [unit-test]() ### AI overview This article describes replacing manual dependency injection in a Ktor backend with Metro. It explains how default constructor parameters and a central BackendComponent can accidentally couple tests to real dependencies such as Redis, while Metro wires constructor parameters at compile time and removes those defaults. ### Source excerpt The Starting Point: a God Object When Rudio was a created a few months ago it used the simplest possible DI: one big object BackendComponent with everything wired manually via by lazy and lateinit var. No framework, no annotations, no ceremony, then i started adding things and manual DI became a tedious and tiring task because everywhere i used default parameters to achieve default constructor... ## Flattening my Dependency Graph DevFeed: [Flattening my Dependency Graph]() Original publisher: [Read original article]() Author: Jesse Wilson Published: 2026-02-03T05:28:50Z Content type: opinion Language: en Sources: [Public Object]() Topics: [Kotlin](), [Persistence](), [Dependency injection](), [PostgreSQL](), [Ktor]() Tags: [dependency-injection](), [kotlin](), [ktor](), [modules](), [persistence](), [postgresql]() ### AI overview The author describes structuring a Kotlin server's dependency graph using a three-module pattern for each feature: public API, implementation, and dependency-injection wiring. The approach aims to support parallel builds, reduce unnecessary rebuilds, and keep dependencies manageable. ### Source excerpt Rounds has a Kotlin server that integrates a few things: PostgreSQL persistence via SQLDelight (hosted on PlanetScale!) WebAuthn4J for Passkeys kotlinx.html for dynamic web pages Ktor for HTTP binding The service uses six database tables. The business domain tables are Game and GameEvent. Support for auth, sessions, and collaborative ## Hosting Kotlin applications using Coolify DevFeed: [Hosting Kotlin applications using Coolify]() Original publisher: [Read original article]() Author: Julien Published: 2024-06-11T10:37:11Z Content type: tutorial Language: en Sources: [Thoughts, stories and ideas.]() Topics: [Kotlin](), [Deployment](), [hosting](), [Ktor](), [GitHub](), [Server](), [Command-line interface]() Tags: [ci](), [cli](), [coolify](), [deployment](), [docker](), [github](), [hosting](), [kotlin](), [ktor](), [server]() ### AI overview A tutorial showing how to deploy a Kotlin Ktor application with Coolify on a self-managed server. It covers creating a sample application, connecting Coolify to GitHub, configuring deployment, and using features such as auto-deploys, custom domains, and preview branches. ### Source excerpt TL;DR : With Coolify you can host you Kotlin applications in seconds on your own server and benefit from auto deploys, custom domains, preview branches and more. You can see the code here, and access the sample here. ## Key advantages of Kotlin Coroutines DevFeed: [Key advantages of Kotlin Coroutines]() Original publisher: [Read original article]() Published: 2024-06-10T00:00:00Z Content type: article Language: en Sources: [Kt. Academy]() Topics: [Coroutines](), [Kotlin](), [kotlin-coroutines](), [Structured concurrency](), [Concurrency](), [cancellation](), [Testing](), [async/await](), [Ktor](), [Back end](), [Android](), [WebSocket]() Tags: [cancellation](), [concurrency](), [coroutines](), [http](), [kotlin](), [kotlin-coroutines](), [ktor](), [structured-concurrency](), [testing](), [workshop-learning-programming]() ### AI overview This article explains the main advantages of Kotlin Coroutines: simpler imperative-style asynchronous code, structured concurrency, lighter execution than threads, cancellation, synchronization, and precise virtual-time testing. It discusses applications in Android and backend development, including Ktor. ### Source excerpt Where Kotlin Coroutines shine and why you should use them. ## How many threads does your network client use? DevFeed: [How many threads does your network client use?]() Original publisher: [Read original article]() Published: 2024-05-13T00:00:00Z Content type: tutorial Language: en Sources: [Kt. Academy]() Topics: [Kotlin](), [kotlin-coroutines](), [Ktor](), [Spring Boot](), [client](), [Network]() Tags: [coroutine](), [coroutines](), [kotlin](), [kotlin-coroutines](), [ktor](), [network](), [spring-boot](), [threads](), [workshop-learning-programming]() ### AI overview This article examines how network clients can consume more threads than expected in Kotlin applications. It explains the thread and memory costs of blocking network requests, contrasts them with suspended Kotlin coroutines, and discusses checking client behavior in Ktor and Spring Boot applications. ### Source excerpt Many popular network clients consume way more threads than you might expect. Let's overview the problem and find a solution. ## Zero downtime deployment with Arrow and Ktor Native DevFeed: [Zero downtime deployment with Arrow and Ktor Native]() Original publisher: [Read original article]() Author: Simon Vergauwen Published: 2023-02-16T00:00:00Z Content type: tutorial Language: en Sources: [nomisRev]() Topics: [Ktor](), [Deployment](), [zero downtime deployment](), [Coroutines](), [Kubernetes](), [Concurrent Programming](), [Kotlin](), [Microservice]() Tags: [concurrency](), [coroutines](), [deployment](), [kotlin](), [ktor](), [kubernetes](), [microservices](), [resource](), [structured-concurrency](), [structuredconcurrency](), [zero-downtime-deployment]() ### AI overview A webinar explains zero-downtime deployment for functional microservices using Ktor and Kubernetes. It also covers structured concurrency, Arrow's Resource DSL, and KotlinX Coroutines for resource safety and complex use cases. ### Source excerpt Webinar with Anton Arhipov on functional microservices with Ktor and Kubernetes about zero-downtime deployments. ## Presenting Cabinet to the World! DevFeed: [Presenting Cabinet to the World!]() Original publisher: [Read original article]() Author: Cláudia Published: 2022-11-30T17:17:35Z Content type: article Language: en Sources: [Blog - Bloco]() Topics: [App](), [Android](), [Jetpack Compose](), [Mobile](), [Google Play](), [Ktor](), [User experience (UX)](), [Template]() Tags: [android](), [android-development](), [app](), [design](), [development](), [directory](), [games](), [google-play](), [internship](), [jetpack-compose](), [ktor](), [launch](), [open-source](), [template]() ### AI overview Bloco introduces Cabinet, a paid Android app directory designed to help users discover hand-picked apps and alternatives without download-based rankings or false marketing. The article describes its categories, launch results, business goals, and implementation with technologies including Jetpack Compose, Paging 3, DataStore, Ktor, and Coil. ### Source excerpt Presenting Cabinet, Bloco's new app! Cabinet helps you discover amazing new apps and alternatives to the ones you use every day. ## Ktor: Altering served content DevFeed: [Ktor: Altering served content]() Original publisher: [Read original article]() Author: Marc Plano-Lesay Published: 2022-09-06T04:00:00Z Content type: tutorial Language: en Sources: [Marc Plano-Lesay]() Topics: [Web Development](), [Netty](), [HTTP](), [servers]() Tags: [configuration](), [html](), [http](), [js](), [kotlin](), [ktor](), [plugin](), [plugins](), [script](), [server](), [web]() ### AI overview A tutorial on creating a Ktor plugin that injects a configured script element into the head of served HTML files. It uses Ktor response-pipeline hooks to transform HTML while leaving other file formats unchanged, with Jsoup handling the HTML modification. ### Source excerpt When serving files with Ktor, there might be times when you need to alter those files. For example, you might want to inject a script in every served HTML file. For this purpose, we can leverage plugins. Plugins can hook at different stages of the request/response pipeline: graph LR Request --> Plugin1[Plugin] Plugin1 --> Handler Handler --> Plugin2[Plugin] Plugin2 --> Response Ktor request/response pipeline Let's write a plugin that transforms a specific type of files - going with the previous example of injecting a script to every served HTML file. Our plugin needs to: Take a script URL as an input. If not provided, it won't do anything. Add that script as a