support ktor.deployment.rootPath

[mcxinyu]

Add ktor.deployment.rootPath to paths in openapi.json.

[mcxinyu]

I have no good way to get io.ktor.server.config.ApplicationConfig in the io.github.smiley4.ktorswaggerui.builder.openapi.PathsBuilder class, so I added it in the io.github.smiley4.ktorswaggerui.routing.ControllerUtils utils class A field for storing it, maybe you can have a good idea?

[SMILEY4]

Hi, thanks for the pr. Could you quickly explain why this change is necessary, i.e. which problem this is trying to solve. I think I'm overlooking something here :)

[mcxinyu]

RootPath is A servlet context path.

It is the same concept as SwaggerUIDsl.kt#L33, but ktor will add this path to the front.

It is similar to the path of a reverse proxy, but it is implemented internally within ktor.

e.g.

in route.kt

get("/test") {}

in application.conf

ktor {
  deployment {
    rootPath = "xxxApi"
  }
}

So the path of this api should be '/xxxApi/test'`.

[mcxinyu]

The problem I solved here is that the user configures rootPath, but the generated openapi.json did not include the path, causing 404 errors in the access interface.

[SMILEY4]

Ah, i see. Looks good then 👍 Thank you!