Ktor test config In this tutorial, we'll show you how to create your first Ktor client application that sends a request and prints out a response. Jul 26, 2023 · For testing functionality related to the request-response handling Ktor provides an testApplication - function that allows to start the server with a test configuration. This practical guide provides step-by-step instructions and examples for asynchronous API development. The Json plugin is installed to deserialize incoming JSON data. Feb 7, 2025 · To use a testing engine, follow the steps below: Create a JUnit test class and a test function. The test suite validates: Connection establishment and Oct 20, 2025 · Ktor includes a multiplatform asynchronous HTTP client, which allows you to make requests and handle responses, extend its functionality with plugins, such as authentication, JSON serialization, and more. The configuration depends on the way you used to create a server - embeddedServer or EngineMain. Then there are the errors about no port and host being set yet the first line of Ktor Version 1. conf) with the HOCON format (if using the EngineMain). For information about Jul 26, 2023 · For testing functionality related to the request-response handling Ktor provides an testApplication - function that allows to start the server with a test configuration. Oct 20, 2025 · The HttpTimeout plugin allows you to configure the following timeouts: request timeout — a time period required to process an HTTP call: from sending a request to receiving a response. For architecture and design details, see May 30, 2019 · The documentation around config at https://ktor. At the heart of this growth is Ktor, a lightweight Oct 13, 2024 · Ktor is a Kotlin-first framework for building connected applications. Oct 20, 2025 · You can learn more about artifacts required by the Ktor client from Adding client dependencies. Oct 20, 2025 · Ktor allows you to use modules to structure your application by defining a specific set of routes inside a specific module. For EngineMain, Ktor loads its configuration from an external file that uses the HOCON or YAML format. Using this approach, you Oct 20, 2025 · Learn how to use Kotlin and Ktor to build a single-page application (SPA) in which RESTful services link to database repositories. In the example below, the module1 extension function defines a module that accepts GET requests made to the /module1 URL path. In this topic, we'll show you how to add an SSL certificate for engines that target JVM and Android. The Websockets plugin for the client allows you to handle a WebSocket session for exchanging messages with a server. When the client makes a request to a specific URL (for example, /hello), the routing mechanism allows us to define how we want this request to be served. We’ll create a Ktor API to be tested, and we won’t use any database to focus on the tests. ktor-env-config solves the issue of different configuration properties per environment. Generating tests for routes and adding sample code for Ktor plugins. Navigating between routes across a project. impl. There are two main approaches in Ktor for creating and running a server: The embeddedServer function is a simple way to configure Dec 21, 2018 · I'm digging the built-in configuration support, and want to use it (instead of just rolling my own alongside Ktor's), but I'm having a hard time figuring out how to do it in a clean way. fun hikari(): HikariDataSource{ val config = Jul 9, 2024 · Ktor Server API Testing: An Adventure Through Code with Koin and MockK — Part-I Mohammad Zaki 4 min read · Oct 30, 2025 · Ktor allows you to configure various server parameters, such as a host address and port, modules to load, and so on. 2. Apr 7, 2021 · For more information about Koin on Ktor, refer to the documentation Configuration On Ktor it is possible to set some configurations, like host address and port, in code (if using the embeddedServer) or in an external file (application. You can learn more from the Migrate projects section. Dec 5, 2024 · This guide walked you through setting up a simple echo WebSocket server, but Ktor WebSockets can be much more powerful, allowing for broadcasting messages, managing multiple channels, and more. Oct 20, 2025 · Ktor provides the Authentication plugin to handle authentication and authorization. A dependency for an engine (for example, ktor-server-netty). Then in production you set the KTOR_ENV=prod For example: application. Note that serializers for specific formats require additional artifacts. 3. development system property allows you to enable development mode when running your application. Jun 5, 2013 · A quick and simple guide on getting your Star Wars Knights Of The Old Republic up and running the way you want it. native-image-server-with-yaml-config - A sample showing how to build and run a Ktor application in the GraalVM native image with a YAML configuration file. I am struggling with writing a test for this endpoint using Kotest and Ktor. conf file in the application resources directory. For Oct 20, 2025 · Ktor supports the WebSocket protocol both on the server-, and the client-side. Sep 5, 2024 · Conclusion With just a few lines of code, you’ve implemented Ktor’s powerful content negotiation and logging features to fetch and log data from an API. Ktor allows you to: Configure basic WebSocket settings, such as frame size, a ping period, and so on. container. Oct 20, 2025 · To test this client, its configuration needs to be shared with a test client, which uses MockEngine. createAdminClient () Each of these accepts an optional configuration lambda to enable setting values on the properties object that is used to create the clients. Each example includes references to actual code in the repository that can be run or adapted. With embeddedServer, you configure the server by passing the desired parameters directly to the function. server. For information about using the library in your application, see the Getting Started guide (#1. The wizard automatically creates an application. Oct 4, 2021 · For more information about testing on Ktor, you can look at the first episode of the series: Structuring a Ktor project. To enable logging, you need to add dependencies for the desired framework and provide configuration specific for this framework. For example, in this test, we produce and consume a message from the same topic, and we use the configuration lambda to set max poll to 1. 1 Ktor Engine Used(client or server and name) Server JVM Version, Operating System and Relevant Context IntelliJ IDEA 2018. You can configure it to check an environment variable KTOR_ENV and to provide a default value dev. If you run a server using embeddedServer, you can use the io. In this way, the connection of the database is automatically performed. development with the -D flag to VM options: Mar 24, 2024 · An example of how to achieve highly concurrent integration tests with Ktor, Postgres, and Test Containers. Feb 2, 2015 · KOTOR Simple Setup & Config Guide hey every-one go on guides and look up this name (KOTOR Simple Setup & Config Guide) it works i did it and iv had no problems so far hop it helps you to Oct 20, 2025 · Edit page Last modified: 20 October 2025 After adding the client dependencies, you can instantiate the client by creating the HttpClient class instance and passing an engine as a parameter: Oct 20, 2025 · To configure SSL in the Ktor client, you need to customize the configuration of an engine used by your client. 2. For example, kotlinx. In this case, you configure the server Jun 17, 2025 · Every Ktor application requires at least the following dependencies: ktor-server-core: contains core Ktor functionality. html#accessing-config does not seem to work if we use the "-config" command line option. To test this client, its configuration needs to be shared with a test client, which uses MockEngine. Nov 7, 2025 · Edit page Last modified: 07 November 2025 Routing is the core Ktor plugin for handling incoming requests in a server application. I don't see any function that's sending in a relevant configure function in to createTestEnvironment. Oct 20, 2025 · The withTestApplication and withApplication functions, previously deprecated in the 2. StaticLoggerBinder" Oct 20, 2025 · This means that Ktor was not able to find a configuration file. Add WebSocket extensions. gradle file: Mar 15, 2021 · I am using the PostgreSQL database in my Ktor Project. Instead, use the testApplication function with the existing Ktor client instance to make requests to your server and verify the results. To test: open the ktor-samples-hello project create Jan 7, 2024 · Ktor project is a web application with sensible and intuitive configuration management. For different platforms, Ktor provides platform-specific artifacts with suffixes such as -jvm, for example, ktor-server-core-jvm or ktor-server-netty-jvm. Hopefully these steps will help Thanks to user Thrashmetal dinosaur on the gpdwin_max_general discord server for the link Jun 18, 2025 · The io. The method of configuration depends on the way you set up a server - using embeddedServer or EngineMain. So many errors when trying to run a simple default app. kt:31) - looks like that map config is being loaded, although I have a HoconConfig (application. For example, with both IntelliJ and the ktor site config generator neither one produced an application. Mar 10, 2024 · In this tutorial, we’ll learn a way to write tests for Ktor controllers. Here's a quick guide to share with you what I did to install and setup KOTOR 1 (GOG version) to run in widescreen (1280x800) on my GPD Win Max but hopefully will work generally. conf: ktor { environment = dev environment = ${?KTOR_ENV} } You can access this config from the application, and use some extension properties to make your life easier: fun Framework for quickly creating connected applications in Kotlin with minimal effort - ktorio/ktor ktor-client-apache ktor-client-apache5 ktor-client-auth ktor-client-bom-remover ktor-client-call-id ktor-client-cio ktor-client-content-negotiation Examples and Samples Relevant source files This page provides practical, runnable code examples demonstrating common use cases of the ktor-mqtt library. io/servers/configuration. Oct 10, 2024 · Ktor 3. Each WebSocket implementation module (Ktor, Built-in, Spring, OkHttp, SockJS) extends this suite to verify conformance with the WebSocketClient interface contract. 1. createStringStringConsumer () container. This plugin provides different logger types for different platforms. 0 is faster, better integrated with Kotlin tools, and offers more options for client-server apps. The primary way to do this is by using the . application. ContentNegotiation for the server respectively. 1 Feedback I found how to use custom defined properties in testing through the document, but how could I use the default application. development system property. It covers client instantiation, the public API surface (methods, properties, and flows), lifecycle management, and common usage patterns. A module is an extension function of the Application class. When this type of test is run, the same Ktor module function that initializes the server on production is called. Oct 30, 2025 · Ktor allows you to configure various server parameters, such as a host address and port, modules to load, and so on. Mar 30, 2018 · I've discovered that the config parser doesn't resolve environment variables if the config is passed via the -config= command line option instead of using the default application. 2 (Ultimate Edition) Build #IU-183. conf. Ktor provides the capability to log HTTP calls using the Logging plugin. With this library, you can easily access configuration properties from anywhere in your code. We'll unpack how this protocol functions and guide you through its Nov 3, 2024 · Kotlin has grown into one of the most popular languages among modern developers, and its role in server-side development is expanding quickly. Feb 26, 2025 · In this lesson, we are going to learn how to work with MongoDB and coroutines using the MongoDB Kotlin Driver in Ktor. If you have imported our project instead - then you need to install "Spek Framework" plugin and after that go to Edit Configuration, choose add new Configuration and select Spek 2 - JVM. Test Infrastructure Relevant source files This document describes Krossbow's comprehensive testing infrastructure for WebSocket client implementations. Development Guide Relevant source files This guide provides information for developers who want to build, test, or contribute to the ktor-mqtt library. Testable Ktor applications can be hosted in a special test environment, which emulates a web server to some extent without actually doing any networking. The documentation mentions that I can specify a custom configuration file to use as such : Now, I would like to do exactly the same, Apr 10, 2020 · Getting Could not find or load main class io. Inside this function, you can configure various request parameters: Specify an HTTP method, such as GET, POST, PUT, DELETE, HEAD, OPTIONS, or PATCH. ContentNegotiation for the test client and io. This information can be verified and trusted since it is signed using a shared secret (with the HS256 algorithm) or a public/private key pair (for example, RS256). 0 release, have now been removed from the ktor-server-test-host package. conf) in my app. It covers the Gradle build system configuration, module structure, platform-specific compilation, and common build tasks. Although it’s often associated with building backend applications, it also provides a highly efficient HTTP Client that can Dec 8, 2022 · Ktor 2. To learn how to generate a self-signed certificate using the Ktor API, see Generate a self-signed certificate. Delving deeper into Ktor’s capabilities can help you create robust, scalable real-time services tailored to your needs. Feb 7, 2022 · Exception in thread "main" io. It uses the Exposed SQL library and allows you to fake repositories for testing. In this tutorial you will learn how to create, open and run a new Ktor project. 1). In this file, you can configure things like the port to listen to, or the modules to be loaded. 0 lets you configure custom plugins in a configuration file. Server configuration can include different settings: a server engine (such as Netty, Jetty, etc. This allows you to share most client configuration in common code while applying engine-specific options in platform code. conf in my test codes? When read properties with environment. I want to set the JDBC URL in my KTor configuration using the one from Testcontainers: @Test fun myTest () Oct 22, 2025 · Explore Ktor's server engines and learn how to configure and use them effectively for your applications. Mar 1, 2023 · I have a ktor server and I'm trying to make unit tests. To share a configuration, you can create a client wrapper class that takes an engine as a constructor parameter and contains a client configuration. The specific scenario I have involves using Testcontainers with KTor. custom_header group: Oct 23, 2025 · If you use EngineMain to run a server, enable the development mode in a configuration file. contentnegotiation. Contribute to ktorio/ktor-documentation development by creating an account on GitHub. Ktor, an asynchronous Impossible to modify response headers (KTOR-2822) ApplicationConfig: how to iterate over keys and values of config (KTOR-2318) Missing Locations params result in 404 instead of 400 (KTOR-447) Implementation for Events Feature For Client Metrics (KTOR-2472) Should return 405 when route exists but not for given method instead of 404 (KTOR-737) Sep 29, 2025 · Note that Ktor provides two approaches to create and configure a server: in code or by using a configuration file. Ensure that there is a configuration file in the resources folder, and that the resources folder is marked as such. In a typical KTOR project, different environments such as Test, Staging, and Production are Oct 20, 2025 · Edit page Last modified: 20 October 2025 Ktor allows you to configure various server parameters directly in code, including the host address, port, server modules, and more. I saved JDBC_URL, JDBC_DRIVER, in system environment variables of Intellij Idea. Code editing assistance, including completion and renaming route names. connection timeout — a time period in which a client should establish a connection with a server. This format is similar to JSON, but is optimized to be read and written by humans, and supports additional features like environment variable substitution. testing / TestApplicationEngine /Configuration Honestly, I've just had it with Ktor. Use the Ktor HTTP client instance inside a test application to make a request to your server, receive a response, and make assertions. In today's post, we're going to start with the simplest one - Basic Authentication. You can leave all fields empty but select jdbcat-ktor_test in "Use classpath or module" field. Apr 2, 2024 · Running a Ktor application depends on the way you used to create a server - embeddedServer or EngineMain: For embeddedServer, server parameters (such as a host address and port) are configured in code, so you cannot change these parameters when running an application. It covers the common test infrastructure, platform-specific test implementations, May 5, 2024 · Hey there, fellow Android devs! Ready to spice up your app’s networking game? Say hello to Ktor — your new best friend for smooth, coroutine-powered networking in Kotlin. Sep 18, 2023 · Welcome to the latest chapter in our ongoing series about implementing authentication with Ktor. Typical usage scenarios include logging in users, granting access to specific resources, and securely transmitting information between parties. Nov 7, 2025 · Update to a new release The IntelliJ Ktor plugin allows you to migrate your Ktor project to the latest version. Configure a URL as a string or configure its components (such as domain,path, and Aug 2, 2022 · At this point, you should have a Ktor server configured with Firebase authentication and learned how to write Ktor tests with a Firebase test authentication provider. EngineMain #1785 Ktor Documentation Ktor is a framework for building asynchronous server-side and client-side applications with ease. From outside you just need to set the current environment as a environment variable and you are all set. Use the testApplication function to set up a configured instance of a test application running locally. This document explains how Krossbow handles testing across multiple Kotlin platforms (JVM, JavaScript, Native, WASM). For example, the application. In this tutorial, deploying process is the same for both approaches. Oct 20, 2025 · JSON Web Token (JWT) is an open standard that defines a way for securely transmitting information between parties as a JSON object. socket timeout — a maximum time of inactivity between two data packets when exchanging data with a server Feb 25, 2023 · I'm very new to KTor. Application Setup Let’s start importing the ktor-server-core, ktor-server-netty, and ktor-serialization-jackson dependencies for our Ktor application in the build. Deployment graalvm - Explains how to build and run a Ktor application in the GraalVM native image. Depending on the included artifacts, Ktor chooses a default serializer automatically. Find more details in the blog post. Mar 13, 2018 · at io. yaml configuration file contains a configuration for a custom plugin in the http. MapApplicationConfig. For detailed guides on specific operations: Client configuration: see Client Building the Project Relevant source files Purpose and Scope This document provides comprehensive instructions for building the ktor-mqtt library from source. tip Oct 11, 2024 · A dedicated run configuration for running and debugging Ktor projects. The Oct 11, 2024 · A dedicated run configuration for running and debugging Ktor projects. 0. This guide is intended for developers who want to contribute to the library, customize builds, or understand the May 5, 2021 · SERIES: Building a backend with Ktor Part 1: Structuring a Ktor project Part 2: How to persist Ktor logs Part 3: How to use an in-memory database for testing on Ktor Part 4: How to handle database migrations with Liquibase on Ktor Part 5 Generate API documentation from Swagger on Ktor Part 6: How to schedule jobs with Quartz on Ktor Part 7: Moving from mobile to backend development with Ktor Documentation for the Ktor framework. This simple setup gives you flexibility Feb 3, 2012 · Maven Ktor project fails to start application with an error: SLF4J: Failed to load class "org. netty. plugins. It provides easy way to test an application without mocking too much stuff, and still achieve good performance while validating application calls. request() function that accepts a URL as a parameter. Oct 22, 2025 · To deliver a Ktor server application as a self-contained package, you need to create a server first. property, I got an Dec 28, 2018 · Ktor Version 1. By leveraging the capabilities of Kotlin Oct 20, 2025 · After configuring the client, you can start making HTTP requests. Having laid a solid foundation by covering the fundamentals of Ktor, we're now prepared to delve into the realm of security protocols. conf files. . It covers the build system, testing infrastructure, CI/CD pipeline, and development workflows. Ktor is a framework for quickly creating web applications in Kotlin with minimal effort. However I'm not able to find good documentation and I can't get it to work, I probably missed something but I am stuck now, it doesn't give any Ktor uses HOCON (Human-Optimized Config Object Notation) format in the external configuration file. Oct 30, 2025 · Get started with building your first Ktor Server application. Get started with Ktor Server Learn how to create, run and test a server application with Ktor. client. Just completely missing. To run an application in development mode using IntelliJ IDEA, pass io. Jul 31, 2020 · This is the first of a series of articles about how to test a Ktor server based on the architecture proposal I’ve written before. We'll demonstrate how to achieve this using a project created in the Creating a cross-platform mobile application tutorial: Open Oct 20, 2025 · Configure SSL in Ktor Specifying SSL settings in Ktor depends on the way used to configure a Ktor server: by using a configuration file or in code using the embeddedServer function. Generating OpenAPI specifications. ktor. WebSocketClientTestSuite Purpose and Design WebSocketClientTestSuite is an abstract base class that provides comprehensive test coverage for WebSocket client implementations. Consider setting up a project using the Ktor project generator or the Ktor plugin for intelliJ IDEA Ultimate to have a working project as the base. test:8080/v1 everything works as expected. Migrating projects to the latest Ktor version. Framework for quickly creating connected applications in Kotlin with minimal effort - ktorio/ktor A subreddit for fans of BioWare's 2003 RPG Star Wars: Knights of the Old Republic, Obsidian Entertainment's 2004 sequel, Star Wars: Knights of the Old Republic II: The Sith Lords, and the upcoming Knights of the Old Republic: Remake. Examples range from basic client operations to advanced scenarios like QoS 2 message delivery, will messages, and concurrent publishing. Jun 27, 2023 · Now it is time for this tutorial’s third and final part on creating a reactive REST service. MissingApplicationPluginException: Application plugin Authentication is not installed The offending section of code is: Oct 20, 2025 · Ktor provides different means of logging your application depending on the used platform: On JVM, Ktor uses SLF4J API as a facade for various logging frameworks (for example, Logback or Log4j) and allows you to log application events. serialization requires the ktor-serialization-kotlinx-json dependency for JSON. 4886. These settings worked for me and I can't guarantee that you will get the same mileage from them. I've got t Jan 14, 2023 · Make sure that you imported the ContentNegotiation plugin from io. If required, you can specify the Aug 26, 2022 · I have a simple Ktor application using application. A configuration mapper for the Ktor framework, providing a way to access settings in a comfortable and type-safe manner. Sep 22, 2024 · Ktor, developed by JetBrains, is a Kotlin-based asynchronous web framework designed to facilitate the development of both client and server applications. ), various engine-specific options, host and port values, and so on. Ktor handles JWTs passed in the Authorization header using the Bearer schema and allows you to Nov 21, 2023 · When I start this application and try to GET http://api. Client API Reference Relevant source files This page provides a comprehensive reference for the MqttClient class, which is the primary interface for interacting with MQTT brokers. slf4j. Oct 20, 2025 · Logging is a way to keep track of what your program is doing and diagnose problems by recording important events, errors, or informational messages. Apr 12, 2023 · I'm looking to properly test a Ktor application, which uses Koin and is specifically not using the embeddedServer method of creating the app. Nov 3, 2025 · When building a multiplatform project, you can use expected and actual declarations to select and configure engines for each target platform. Handle a WebSocket session for exchanging messages between the server and client. You can also use Authentication with Sessions to keep a user's information between requests. config. my. So many docs which don't correspond with files in the templated directory structure. Feb 25, 2025 · Build robust RESTful APIs with Kotlin & Coroutines. 37, built on De Oct 20, 2025 · Ktor supports the WebSocket protocol both on the server-, and the client-side. property(MapApplicationConfig. For EngineMain, Ktor loads its configuration from a configuration file that uses the HOCON or YAML format. When development mode is enabled, Ktor will be watching output files from the working directory automatically. ktor-server-test-host / io. The infrastructure consists of three main components: an abstract test suite base class (WebSocketClientTestSuite), a Gradle plugin for managing a shared test server, and utilities for platform-specific test configuration. All solutions that I have found were either outdated or were using the embedded server. You can specify the default configuration parameters and possible overwrites in env specific blocks. The ktor-env-config library is designed to provide environment-aware configuration capabilities for KTOR projects. Please help The ktor-env-config library is designed to provide environment-aware configuration capabilities for KTOR projects. omfkfggsb aqrjq ggvfjw bei skzz haqwxh ohw kmpe fxfh ojcuthh keq kqwnqf amyxatc dkbmce eziq