[Snyk] Security upgrade io.ktor:ktor-server-netty from 1.5.3 to 2.0.0

[caniszczyk]

Snyk has created this PR to fix 3 vulnerabilities in the maven dependencies of this project.

Snyk changed the following file(s):

• builders/testdata/java/ktordemo/pom.xml

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score	Upgrade
	Allocation of Resources Without Limits or Throttling SNYK-JAVA-IONETTY-18170202	828	io.ktor:ktor-server-netty: 1.5.3 -> 2.0.0 Major version upgrade Proof of Concept
	Allocation of Resources Without Limits or Throttling SNYK-JAVA-IONETTY-18170204	828	io.ktor:ktor-server-netty: 1.5.3 -> 2.0.0 Major version upgrade Proof of Concept
	Allocation of Resources Without Limits or Throttling SNYK-JAVA-IONETTY-18170213	721	io.ktor:ktor-server-netty: 1.5.3 -> 2.0.0 Major version upgrade No Known Exploit

Breaking Change Risk

Notice: This assessment is enhanced by AI.

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🦉 Allocation of Resources Without Limits or Throttling

[caniszczyk]

The upgrade from Ktor 1.5.3 to 2.0.0 is a major version change with significant and extensive breaking changes that will require substantial code modification.

Key Breaking Changes:

• Feature Renamed to Plugin: The core concept of ApplicationFeature has been universally renamed to Plugin. This affects all plugin installations and custom plugin implementations. Imports must be changed from io.ktor.features.* to io.ktor.server.plugins.*.

• Package and Module Restructuring: To improve consistency, server-specific code has been moved into the io.ktor.server.* package. This requires updating many import statements throughout an application.

• Testing API Overhaul: The testing API has been completely rewritten. The withTestApplication function is removed and replaced by a new testApplication function, which changes how test clients are created and how requests are made. Test suites will need to be migrated to the new API.

• Content Negotiation Refactoring: The ContentNegotiation feature is no longer in ktor-server-core. It has been moved to a separate ktor-server-content-negotiation artifact, and serialization libraries have been moved to ktor-serialization-* artifacts. This requires updating build dependencies and imports.

• WebSocket Package Move: WebSocket code has been moved from io.ktor.http.cio.websocket.* to its own io.ktor.websocket.* package, requiring import updates.

Source: Ktor 2.0 Migration Guide.

Recommendation: This is a high-effort migration. Developers must carefully follow the official migration guide to update package imports, dependencies, plugin configurations, and rewrite all server tests. Automated migration tools offered by IntelliJ IDEA may assist but manual intervention is expected.

Notice 🤖: This content was augmented using artificial intelligence. AI-generated content may contain errors and should be reviewed for accuracy before use.

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