Gson

ContentNegotiation provides the built-in Gson converter for handing JSON data in your application.

Add Dependencies

Before registering the Gson converter, you need to include the following artifacts in the build script:

Gradle (Groovy)

Gradle (Kotlin)

Maven

implementation "io.ktor:ktor-gson:$ktor_version"

To register the Gson converter in your application, call the gson method:

import io.ktor.gson.*
install(ContentNegotiation) {
    gson()
}

Inside the gson block, you can access the GsonBuilder API, for example:

install(ContentNegotiation) {
        gson {
            setPrettyPrinting()
            disableHtmlEscaping()
            // ...
        }
}

To learn how to receive and send data, see Receive and Send Data.