Ktor: Ktor starter application throw errors on start

[dedward3]

Ktor Version

1.1.3

Ktor Engine Used(client or server and name)

default Http client

JVM Version, Operating System and Relevant Context

OS: MacOS
JVM: Java 10
Gradle: Gradle wrapper bundled with Ktor starter
Ktor Starter Options: https://start.ktor.io/#dependency=ktor-client-core&dependency=ktor-jackson&dependency=cors&dependency=routing&dependency=content-negotiation&project-type=gradle-kotlin-dsl

Feedback

I went over to start.ktor.io to try out ktor, selected the options listed above, downloaded the project, ran ./gradlew build && ./gradlew run and I encountered this error:

"Caused by: java.lang.IllegalStateException: Failed to find HTTP client engine implementation in the classpath: consider adding client engine dependency."

I looked around at the link provided in the error, but I was under the impression that ktor had a default http engine.

[e5l]

Hi, @dedward3. Thanks for the report.

To use ktor-client, you should select one of the client engines to perform the request. Here you could find additional details: https://ktor.io/clients/http-client/engines.html

Could you try to generate a project with one of client engines or add it to dependency section of your build.gradle file?

[dedward3]

hey @e5l,

When I added the CIO engine everything booted up just fine. So I'm guessing that HttpClient engine is just the core and the options below it are implementations of it?

[e5l]

Yes, and we can use different engines depending on the platform.

Closed.

[halfbaked]

Just in case anyone else hits this page for the same reasons I did, I was seeing the above error since upgrading to 1.4.0.
It looks like the package names for the http client implementations have now changed, and -jvm has been added, so the gradle file has to be edited accordingly.