Summary - Ktor HTTP
- Kotlin course
- Advanced
- Lesson 18/83
- 5 min
Combine HttpClient, GET and JSON to write an API client.
Summary - Ktor HTTP
This group covered Ktor client, HttpClient, GET, POST and JSON deserialization. These are the foundations of a modern HTTP client.
You open an HttpClient, configure it with plugins, make requests with get and post, and turn the result into an object with body(). Because it is coroutine based you can run concurrent calls without blocking the UI thread. The next group moves to the server side.
Practice Summary: Ktor GET
Create an HttpClient. Make a GET request with val response = client.get("https://api.example.com/users"). Print println("Request ready"). Then close with client.close().
Starter code
// Summary: Ktor GET
// write here
import io.ktor.client.*
import io.ktor.client.request.*
fun main() {
}Sample solution
fun main() {
val client = HttpClient()
val response = client.get("https://api.example.com/users")
println("Request ready")
client.close()
}Expected output
Request ready
Questions and answers
Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.
1 Which one is used to send a body in a POST request?
- getBody
- setBody Correct answer
- setUrl
- setHeader
Explanation: answer: setBody. The body is added with setBody.
2 Match all Ktor client concepts
| Term | Meaning |
|---|---|
HttpClient |
Client |
get |
GET request |
post |
POST request |
@Serializable |
Class mark |
.body() |
Gets object |