\name{shinyServer}
\alias{shinyServer}
\title{Define Server Functionality}
\usage{
  shinyServer(func)
}
\arguments{
  \item{func}{The server function for this application. See
  the details section for more information.}
}
\description{
  Defines the server-side logic of the Shiny application.
  This generally involves creating functions that map user
  inputs to various kinds of output.
}
\details{
  Call \code{shinyServer} from your application's
  \code{server.R} file, passing in a "server function" that
  provides the server-side logic of your application.

  The server function will be called when each client (web
  browser) first loads the Shiny application's page. It
  must take an \code{input} and an \code{output} parameter.
  Any return value will be ignored. It also takes an
  optional \code{session} parameter, which is used when
  greater control is needed.

  See the
  \href{http://rstudio.github.com/shiny/tutorial/}{tutorial}
  for more on how to write a server function.
}
\examples{
\dontrun{
# A very simple Shiny app that takes a message from the user
# and outputs an uppercase version of it.
shinyServer(function(input, output, session) {
  output$uppercase <- renderText({
    toupper(input$message)
  })
})
}
}