Kotlin http client. Retrofit uses OkHttp under the hood.

Kotlin http client. This article aims to guide you through making GET and POST requests with Ktor client, which is a powerful and Dec 5, 2024 · Discover OkHttp, a powerful HTTP client for Java and Kotlin. Customers may choose to override the default HTTP client by specifying an existing HttpClientEngine implementation or implementing their own and referencing that implementation in the service client configuration at the time of client construction. It offers an abstraction over HTTP libraries that allows for convenient conversion from a Java object to an HTTP request, and the creation of objects from an HTTP response. Extract information from requests. HTTP (Hypertext Transfer Protocol) is the foundation of data communication on the web, and Kotlin provides several ways to work with HTTP requests and responses. Ktor is a framework for building asynchronous servers and clients in connected systems. Note: The Kotlin protoc plugin uses the Java protoc plugin behind the scenes to generate message types as Java HTTP Client using ktor. Feb 23, 2023 · implementation ("aws. Sep 9, 2025 · To create the HTTP client, the HttpClient constructor is called. Aug 1, 2025 · After configuring the client, you can start making HTTP requests. Nov 17, 2024 · Ktor is a Kotlin-based framework for building efficient HTTP clients and servers. Feb 13, 2019 · Not adding much to the current answer but in response to CVS's comment I've been using the following to add ktor client error handling in my applications. 16. The main function is marked as suspend and wrapped in coroutineScope to use coroutines. Useful for translating JSON responses into model objects. Each platform requires a specific engine to process network requests. It simplifies the process of making network requests and handling Responses. Sep 13, 2018 · In this tutorial, we’ll have a look at the Fuel HTTP Library, which is, in the author’s words, the easiest HTTP networking library for Kotlin/Android. How it Works Under the Hood OkHttp is a popular HTTP client library for Android and other platforms. In this tutorial, we'll show you how to create your first Ktor client application that sends a request and prints out a response. The suspending greeting function is used to make a request and receive the body of a response as a string value. Customizing requests 我们不能只进行 get 请求，Ktor 允许使用任何 HTTP 动词构件复杂请求，并且灵活地以多种方式处理响应。 Default http methods 与 request 类似，还有几个可以 使用最常见的 HTTP 动词（GET 、 POST 、 PUT 、 DELETE 、 PATCH 、 HEAD 以及 OPTIONS Jun 3, 2022 · How to use Retrofit, Moshi, Gson, Kotlin Serialization and Ktor client libraries to connect the REST Tagged with android, beginners, kotlin, jetpackcompose. The easiest HTTP networking library for Kotlin backed by Kotlinx Coroutines. With the use of Ktor-http-client, developers can make fluent HTTP requests asynchronously, with the support of such things as request and response transformation and HTTP cookies. This practical guide provides step-by-step instructions and examples for asynchronous API development. First add the dependency to your project: Kotlin multiplatform simple http request library. Apr 5, 2024 · Deep Dive: HTTP请求的概念随着网络在90年代初期的发展而普及。 Kotlin社区推荐了几个HTTP客户端库，如Ktor和Fuel。 Ktor以其异步性质和易用性著名，它由Kotlin团队官方支持，完全用Kotlin编写。 发送HTTP请求时，你能设置请求如方法 (GET、POST等)、头部、体部和超时。 Feb 29, 2024 · Retrofit, backed by Square, is a type-safe HTTP client for Android and Java. 0) and save hours of work. kohttp is a kotlin DSL http client. All modern Android Applications interact with resources available online or a backend-specific to the app. We will use the Volley Library for handling HTTP requests. Demo and devcontainer. It simplifies the process of making HTTP requests and… Dec 5, 2024 · Creating HTTP requests in Kotlin is quite straightforward whether you choose Ktor Client for its coroutine support or Fuel for its simplicity. Simplify your code with the declarative HTTP client. It relies on annotations to streamline the process of defining API endpoints and their corresponding HTTP methods. On the JVM we have several available options, from lower-level to very high-level libraries, from established projects to new kids on the block. It makes use of the Result API. IO) { Jun 20, 2022 · What would you suggest as the most efficient coroutine based http client for kotlin (that runs on linux). Creating a RequestBody is essential for sending HTTP requests, particularly when working with POST or PUT methods that require sending body content. Fuel, khttp, kohttp, httpmocker, Asynkio, and networkinkt Home » aws. This tutorial covers setup, routing, and testing on a real-life example. Contribute to rybalkinsd/kohttp development by creating an account on GitHub. To do this, call the HttpClient. Every engine Jun 16, 2025 · Learn to build Kotlin RESTful APIs with Ktor. This lesson teaches how to interact with APIs in Kotlin using the OkHttp library. Retrofit uses OkHttp under the hood. kotlin » http-client Apache HTTP client abstractions Last Release on Oct 4, 2025 Aug 12, 2024 · OkHttp Client Engine for Smithy services generated by smithy-kotlin Oct 3, 2023 · In this article, we will see how easily we can generate a Kotlin client from any OpenAPI Spec (both 2. By default, the AWS SDK for Kotlin uses an HTTP client based on OkHttp. I have a database and I already did the API to go fetch the information to the server. Compare features, performance, and use cases. One additional requirement is to be also able to limit the number of in progress requests. Contribute to uakihir0/khttpclient development by creating an account on GitHub. Jul 7, 2020 · kotlin ktor kotlin-multiplatform ktor-client asked Jul 6, 2020 at 18:32 Kapil G 4,141 2 24 33 May 11, 2023 · Introduction Advantages of using Ktor Client: Cross-platform support: Unlike Retrofit, which is Java-based and has different implementations for Android and iOS, Ktor is built on Kotlin Multiplatform Mobile (KMM). Cross-Platform Ambitions: If there’s Mar 1, 2019 · Most of the mobile applications are based on communication with an API Rest. For non-streaming requests, the response body is automatically loaded and cached in memory, allowing repeated access. Mar 26, 2024 · When to Consider Ktor Kotlin-heavy Projects: If Kotlin is your primary language, Ktor’s coroutine integration and idiomatic Kotlin style will feel natural. This guide will walk you through using OkHttp for performing low-level networking in Kotlin. However, there may be benefits to using a client that is more optimized for your runtime environment (for example, to optimize AWS Lambda cold start times). To test this client, its configuration needs to be shared with a test client, which uses MockEngine. Here’s a rundown of the best five Android HTTP client third-party tools that can help streamline your development process. Apr 8, 2022 · Make HTTP Requests in Kotlin Using Ktor (https://ktor. A generic HTTP client written in Kotlin. For example, you can use Apache or Jetty for JVM applications, OkHttp or Android for Android, Curl for desktop applications targeting Kotlin/Native. ) and both asynchronous and blocking requests Ability to download and upload a file (multipart HTTP client generator / KSP plugin for Kotlin Multiplatform (Android, iOS, Js, Jvm, Native, WasmJs)) using KSP and Ktor clients inspired by Retrofit https://foso. 0") Jul 20, 2024 · Ktor Client is an efficient way of executing HTTP request in Android projects which also supported in Kotlin Multiplatform. This guide explores how to use it for API interactions. Kotlin, with its robust features and seamless integration with Java libraries, provides Dec 5, 2024 · Ktor, with its performance efficiency and ease of use in handling HTTP tasks, provides a worthwhile addition to any Kotlin-based server or client-side application. May 14, 2018 · This client is created in the Activity/Fragment using this class and passed to it. Sep 12, 2025 · This tutorial demonstrates how to use IntelliJ IDEA to create an advanced mobile application for iOS and Android using Kotlin Multiplatform. In this guide, we will create a Micronaut application written in Kotlin to consume the GitHub API with the Micronaut HTTP Client. This application is going to: Retrieve data over the internet from the public SpaceX API using Ktor Save the data in a local database using SQLDelight. Dec 5, 2024 · Ktor is a framework sponsored by JetBrains for building asynchronous servers and clients in connected systems using Kotlin. Serialization helpers for working with JSON with ease, Ktor HTTP client integration. Jan 24, 2024 · Retrofit is a popular HTTP client library for Android. http4k provides a simple and uniform way to serve, consume, and test HTTP services. It supports many server, client, and testing technologies, and has 50+ pre-built integrations. We use HttpClient and Fuel library. Handle errors when converting data. The integration with an external service is fundamental in mobile development. In this tutorial, we will guide you through the steps of making HTTP Jul 6, 2024 · Ktor is a Kotlin-based framework well suited to handle various tasks, ranging from microservices to multiplatform applications. Configure a URL as a string or configure its components (such as domain,path, and Feb 18, 2023 · In Kotlin, Ktor is a lightweight and powerful framework that provides a flexible and easy-to-use API for making HTTP requests. To handle large responses efficiently, use a streaming approach, which processes the Jul 23, 2025 · In any Android Application, there is only so much a user can do without an internet connection. 目的与初衷 最近在工作中需要在后台调用第三方接口（微信，支付，华为点击回拨，三通一达物流快递接口），最近在学习Kotlin，尝试使用Kotlin和HttpClient，自己封 The okhttp3 library is a powerful HTTP and HTTP/2 client for Android and Java applications. Written in Kotlin from the ground up. Inside this function, you can configure various request parameters: Specify an HTTP method, such as GET, POST, PUT, DELETE, HEAD, OPTIONS, or PATCH. Dec 6, 2024 · HTTP client libraries simplify this task by providing robust tools for network communication. I am The HTTP client implementation in Kotlin Multiplatform provides a robust foundation for cross-platform networking. In today’s article, we’ll look at the Ktor Client and how to leverage it for our applications. Project Setup Aug 12, 2024 · After you finish working with the HTTP client, you need to free up the resources: threads, connections, and CoroutineScope for coroutines. kotlin:http-client-engine-crt-jvm:0. io/), it is super easy to make HTTP requests in Kotlin all you need is… val client = HttpClient (CIO) val response: HttpResponse = … Oct 6, 2019 · This is the first post in series observing the latest changes in kohttp and the reasons behind. The Functional toolkit for Kotlin HTTP applications. Only 90 lines of code. HTTP Client 1,269 usages aws. Configuring HTTP Clients By default, the AWS SDK for Kotlin uses an HTTP client from OkHttp. Kotlin HTTP Client In today's interconnected world, most applications need to communicate with external services or APIs over the internet. Use unit tests to validate routing. To share a configuration, you can create a client wrapper class that takes an engine as a constructor parameter and contains a client configuration. Jan 9, 2021 · About Make HTTP requests from inside WASM in Kotlin. OkHttp Client Engine for Smithy services generated by smithy-kotlin Nov 27, 2023 · The AWS SDK for Kotlin includes a default HTTP client (based on OkHttp) that works well for most use cases. Anything from microservices to multiplatform HTTP client apps in a simple way. Simple implementation of Ktor Http Client for Android with Kotlin Serialization. Reload smithy-lang / smithy-kotlin Public Notifications You must be signed in to change notification settings Fork 30 Star 93 Code Issues28 Pull requests6 Discussions Projects Security Jan 3, 2024 · Include a reference to the Google Play Services Client Library for Cronet in the dependencies section of your app module's build. Which are the best open-source HTTP Client projects in Kotlin? This list will help you: fuel, http4k, Ktorfit, HTTP-Shortcuts, kohttp, AndroidSnooper, and hello-http. In this article, we’re going to look at khttp, an idiomatic Kotlin library for consuming HTTP Simple and fun Create asynchronous client and server applications. Open Source, free, and fun! This Kotlin example demonstrates how to create a simple HTTP client using coroutines for asynchronous execution. runCatching {} catches all Throwable s and you can tweak the behaviour of the getOrElse block to capture the exceptions you're interested in. Jan 4, 2020 · @Grapes ( @Grab (group='aws. To have an optimal integration, it is necessary to ensure it by integration tests. Emphasis is placed on handling various status codes for robust API communication. Aug 22, 2025 · Edit page Last modified: 22 August 2025 The Ktor HTTP client is multiplatform and runs on JVM, Android, JavaScript (including WebAssembly), and Native targets. Sep 7, 2020 · I am new to Android development with Kotlin and I am struggling on finding any useful documentation on how to create a simple GET and POST requests with the best current practices as possible. Let’s break down the code: We import necessary Kotlin coroutines and Java networking classes. Contribute to Hydragyrum/kotlin-http-client development by creating an account on GitHub. Jun 17, 2025 · In this tutorial, you’ll learn the basics of routing, handling requests, and parameters in Kotlin with Ktor by building a task manager application. This client object is passed to the OkHttpRequest class and an object of the OkHttpRequest class is created. JDK 11+ HTTP Client A multiplatform asynchronous HTTP client that allows you to make requests, handle responses, and extend its functionality with plugins such as authentication, JSON serialization, and more. kotlin', module='http-client', version='1. Nov 30, 2024 · OkHttp is a powerful HTTP client in the Kotlin world that helps developers efficiently manage network requests and handle modern web features with ease. Feb 25, 2025 · Build robust RESTful APIs with Kotlin & Coroutines. By leveraging platform-specific implementations while maintaining a common interface, developers can create efficient and maintainable networking code. By the end of this tutorial you will know how to do the following: Handle GET and POST requests. kotlin » http-clientHTTP Client Jul 23, 2025 · Built on top of Ktor, ktor-http-client is a powerful HTTP client library. request() function that accepts a URL as a parameter. Dec 12, 2024 · OkHttp: A HTTP client for Java and Kotlin that handles low-level network operations like efficient HTTP connection pooling and caching. This guide outlines how to effectively create and use a RequestBody in Kotlin using the okhttp3 library. This is a guide to Kotlin HTTP Client. Display a list of SpaceX rocket launches together with the launch date, results, and a detailed Jul 13, 2023 · Networking in Kotlin Multiplatform Mobile Using Ktor In today’s mobile app development landscape, data transfer between clients and web servers is a fundamental requirement. Learn how to use Micronaut low-level HTTP Client. The toolkit takes direct inspiration from the Twitter paper “ Your server as a function “, which suggests minimal functional abstractions are all we need to build elegant and complex distributed systems. It’s part of the Spring Web module and is used to consume RESTful web services. Contribute to crmepham/http-client development by creating an account on GitHub. This repo includes the sources for the following: protoc-gen-grpc-kotlin: A protoc plugin for generating Kotlin gRPC client-stub and server plumbing code. This means you can create both iOS Please note that some of response types are Closeable and can hold resources. HTTP Request in Android with Kotlin Asked 8 years ago Modified 1 year, 8 months ago Viewed 266k times Jun 13, 2024 · 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 goal is to enable reliable API interactions, serving as a foundational step May 13, 2022 · How to use Retrofit, Moshi, Gson, Kotlin Serialization and Ktor client libraries to connect the REST API web service in Android app? Jun 17, 2020 · What's the correct pattern of usage for HttpClient in KTOR. RestTemplate is a synchronous client that’s used to perform HTTP requests. The main features of the library include: Support for basic HTTP verbs (GET, POST, DELETE, etc. Furthermore, the library can also be used in Java. The HttpEngine interface defines two functions: execute and close. gradle file, as shown in the following example: Groovy Kotlin More Feb 6, 2025 · The Json plugin is installed to deserialize incoming JSON data. 20', scope='runtime') ) OkHttp is published as a Kotlin Multiplatform project. close function: Kotlin DSL http client. In this article, we will look at one of the ways through which we can retrieve and post resources online through HTTP Requests. As a final result I need to present the API json in the Jul 11, 2025 · Explore the features of the HTTP Client plugin: compose and execute HTTP requests, view responses, configure proxy settings, certificates, and more. Kotlin: A modern, statically typed programming language for the JVM and other platforms. Dec 9, 2023 · In Kotlin, one of the simplest ways to make HTTP requests is by using the Ktor client. Oct 6, 2024 · Throughout these posts, we’ve explored various aspects of working with Ktor-client, from setting up logging and handling HTTP timeouts to making different types of requests and optimizing concurrency with coroutines. Nov 20, 2022 · I needed an example of an HTTP GET request in kotlin. While Gradle handles this automatically, Maven projects must select between okhttp-jvm and okhttp-android. Ktor is an asynchronous framework for creating microservices, web applications and more. The primary way to do this is by using the . Http4k sells itself as the “functional toolkit for Kotlin HTTP applications”. 2. github. By incorporating khttp into your Kotlin projects and utilizing its features for handling JSON, binary data, custom headers, and query parameters, you can efficiently interact with web services and APIs. Creating client To create a new client, you can call: Discussion about Kotlin, a statically typed programming language for the JVM, Android, JavaScript, and native. This repository contains two integrations for Kotlin Jupyter notebooks. Jun 16, 2021 · So, I have a following function which does a basic request using Ktor client to get a list of users, suspend fun createRequest(): List<User>? { return withContext(Dispatchers. You can override the HTTP client and its configuration by supplying an explicitly configured client. A Kotlin/JVM implementation of gRPC: A high performance, open source, general RPC framework that puts mobile and HTTP/2 first. Mar 19, 2024 · The HTTP protocol and APIs built on it are of central importance in programming these days. The RestClient is a synchronous HTTP client that offers a modern, fluent API. Mar 30, 2025 · Conclusion khttp is a versatile and straightforward HTTP client library for Kotlin that simplifies making HTTP requests and handling responses. io/Ktorfit - Foso/Ktorfit Nov 30, 2024 · Handling HTTP Responses in KotlinWorking with HTTP responses is a common task when developing applications, especially those that consume APIs. Mar 19, 2024 · In this tutorial, we’ll learn about Http4k, a Ktor alternative to Kotlin server-side development. Http4k Jan 29, 2024 · Kotlin HTTP GET/POST request tutorial shows how to send a GET and a POST request in Kotlin. While this is efficient for small payloads, it may lead to high memory usage with large responses. Here we discuss the introduction, requests, kotlin HTTP client configuration, methods and FAQ. It seamlessly integrates Kotlin features such as coroutines and proves powerful in today’s landscape. All libraries and projects - 6. Dec 21, 2023 · OkHttp is a popular open-source HTTP client for Android and Java applications. However, most of them are targeted primarily at Java programs. A tiny http client for Kotlin/Android. If is fully based on kotlin embedded DSL features, as a next Discover the new Kotlin HTTP Clients for your next project. This post will go through a few of the methods in which you can make such requests in Kotlin using some of the great open source libraries available. Here’s a guide on how to use Retrofit in Kotlin: 除了 HTTP 服务外，Ktor 还包含一个灵活的异步 HTTP 客户端。 这个客户端支持多个 可配置的引擎，并且有自己的一组 特性。 Jan 11, 2025 · HTTP: Hypertext Transfer Protocol is a protocol used for transferring data over the internet. With the appearance of Kotlin Multiplatform, there is a very interesting scenario like having a client of a REST API in a multiplatform library and that we Jun 17, 2025 · The onDownload() extension function in the example above is used to display download progress. This is wrapper around native HttpURLConnection. smithy. Jun 15, 2018 · Make HTTP Requests in Kotlin 15 Jun 2018 (Last Updated: 15 Oct 2022) Updated - Added section on the new HTTP Client in JDK 11+ These days making HTTP requests in any language is a staple of many common workflows and features. The project is using the free api from thecocktaildb for providing data. Gson: A Java library to convert JSON into Java objects (POJOs) and vice-versa. It covers setting up the environment, making GET requests, and handling responses using HTTP status codes and JSON parsing with kotlinx. Understanding how to work with headers and parameters is crucial for successful interactions with web APIs. 0 and 3. serialization. Explore its features, setup, advanced usage, and solutions to common errors. Mar 19, 2024 · In this tutorial, we’ll look at a few examples of using Spring’s RestTemplate in Kotlin. http4k lets you serve, consume, and test HTTP services with Kotlin functions. 4. It’s an ideal entry-level tutorial for Kotlin backend developers. . Should I use it like singleton per app lifecycle, or should I create it per each request? You can use a different HTTP client with Apollo Kotlin by creating a custom class that implements the HttpEngine interface. It’s a robust tool, and its standout feature is the ability to Oct 13, 2024 · Kotlin-first Approach: Ktor is designed specifically for Kotlin, making it highly idiomatic and allowing it to fit naturally into the Android ecosystem, which is increasingly Kotlin-centric. - http4k/http4k Dec 1, 2024 · Using MockWebServer in your Kotlin tests can greatly enhance your ability to test HTTP client components, with flexibility and control over server responses, paving the way for high-quality, reliable software development. gbqc28o 1pqfh2 hynu fxrm u0nl bw2m9 fdlu7 ve4x ayh btp65