jetty-utils/com.pambrose.common.servlet/LambdaServlet

LambdaServlet

open class LambdaServlet(contentType: String, block: () -> String) : HttpServlet

An HttpServlet that serves the result of a lambda function as the HTTP GET response body.

Responses include Cache-Control: must-revalidate,no-cache,no-store headers. The body is encoded as UTF-8 unless contentType names a charset, and holds exactly what the lambda returned, with no line separator appended. If the lambda throws, the response is left untouched, so the container reports the error instead of an empty 200.

Only doGet is overridden, and HttpServlet answers HEAD through it, so a HEAD request runs the lambda too.

Parameters

contentType

the MIME content type for the response. Defaults to "text/plain".

block

a lambda that produces the response body string.

Inheritors

Constructors

constructor(contentType: String, block: () -> String)

constructor(block: () -> String)

Constructs a LambdaServlet with a default content type of "text/plain".

Properties

initParameterNames

open val initParameterNames: Enumeration<String?>?

open val servletConfig: ServletConfig?

open val servletContext: ServletContext?

open val servletInfo: String?

open val servletName: String?

Functions

open fun destroy()

getInitParameter

open fun getInitParameter(name: String?): String?

open fun init()

open fun init(config: ServletConfig?)

open fun log(msg: String?)

open fun log(message: String?, t: Throwable?)

open fun service(req: ServletRequest?, res: ServletResponse?)