Migrate web application from Dropwizard to Ktor

[Copilot]

Replaces Dropwizard with Ktor for the web server framework. FreeMarker templating is retained but adapted to Ktor's model-based approach.

Routing

JAX-RS annotations replaced with Ktor DSL:

// Before (Dropwizard)
@Path("/factoids")
@GET
fun factoids(@QueryParam("page") page: Int?): View {
    return viewFactory.createFactoidsView(request, page ?: 1)
}

// After (Ktor)
get("/factoids") {
    val page = call.request.queryParameters["page"]?.toIntOrNull() ?: 1
    val view = viewFactory.createFactoidsView(KtorServletRequest(call), page)
    call.respond(FreeMarkerContent("main.ftl", view.toModel()))
}

Dependencies

• Removed: dropwizard-core, dropwizard-auth, dropwizard-assets, dropwizard-views-freemarker
• Added: ktor-server-netty-jvm, ktor-server-freemarker-jvm, ktor-server-sessions-jvm, and supporting modules

View Layer

• Removed inheritance from io.dropwizard.views.View
• Added toModel(): Map<String, Any?> methods to convert views to FreeMarker data models
• Views now return data maps instead of rendering through Dropwizard's view system

Templates

FreeMarker templates updated to access model properties directly:

• loggedIn() → loggedIn
• getChannels() → channels
• encode(value) → value?url

Application Bootstrap

JavabotApplication converted from extending Application<JavabotConfiguration> to using Ktor's embeddedServer:

• Session management via Ktor Sessions plugin
• Error handling via StatusPages plugin
• Static resources via static {} DSL

Compatibility

KtorServletRequest adapter bridges ApplicationCall to HttpServletRequest interface, minimizing changes to existing view code that expects servlet APIs.

Known Issues

• Authentication implementation incomplete (placeholder returns null)
• OpenIDAuthenticator still references Dropwizard auth classes
• Tests not yet updated for Ktor

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• central.sonatype.com
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --enable-native-access=ALL-UNNAMED -classpath /usr/share/apache-maven-3.9.12/boot/plexus-classworlds-2.9.0.jar -Dclassworlds.conf=/usr/share/apache-maven-3.9.12/bin/m2.conf -Dmaven.home=/usr/share/apache-maven-3.9.12 -Dlibrary.jansi.path=/usr/share/apache-maven-3.9.12/lib/jansi-native -Dmaven.multiModuleProjectDirectory=/home/REDACTED/work/javabot/javabot org.codehaus.plexus.classworlds.launcher.Launcher clean compile -DskipTests (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

there is a web/ folder that defines a web app based on dropwizard. convert this dropwizard application to one that uses ktor. update the templating of web pages to what it suitable for using with ktor.

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.