HTTP request and response

Ktor HTTP request/response can be intercepted by installing various plugins to your module or by intercepting specific phases of application call pipeline. By installing graphql-kotlin-ktor-server plugin you will configure following pipeline

Installing Additional Plugins

You can install additional plugins in your module next to the GraphQL module. See Ktor docs for details.

fun Application.myModule() {
    // install additional plugins
    install(CORS) { ... }
    install(Authentication) { ... }

    // install graphql plugin
    install(GraphQL) {
        schema {
            packages = listOf("com.example")
            queries = listOf(TestQuery())
        }
    }
    // install authenticated GraphQL routes
    install(Routing) {
        authenticate("auth-basic") {
            graphQLPostRoute()
        }
    }
}

Intercepting Pipeline Phases

You can intercept requests/responses in various phases of application call pipeline by specifying an interceptor. See Ktor docs for details.

fun Application.myModule() {
    install(GraphQL) {
        schema {
            packages = listOf("com.example")
            queries = listOf(TestQuery())
        }
    }
    install(Routing) {
        graphQLPostRoute()
    }

    intercept(ApplicationCallPipeline.Monitoring) {
        call.request.origin.apply {
            println("Request URL: $scheme://$localHost:$localPort$uri")
        }
    }
}