Your Kotlin code in main.kt, running on Cloudflare Workers
In addition to Wrangler you will need to install Kotlin, including a JDK and support for Gradle projects. The easiest way to do this is using the free Community Edition of IntelliJ IDEA.
To generate using wrangler
Note: This still uses Service Workers API instead of the newer module syntax
Kotlin JS doesn't support module syntax with default export yet, so we need to use the Service Workers API for now.
// new module syntax with default not supported yet in Kotlin JS
export default {
async fetch(request, env, ctx) {
return new Response('Hello World!');
},
};wrangler generate projectname https://github.com/griffio/kotlin-worker-hello-world
You need to register a workers.dev subdomain before running the dev command in remote mode
Further documentation for Wrangler can be found here.
After setting up Kotlin per the linked instructions above,
cd projectname
./gradlew build
That will compile your code and package it into build/distributions/kotlin-worker-hello-world.js, after which you can run wrangler deploy build/distributions/kotlin-worker-hello-world.js to push it to Cloudflare.