service: Process requests

Description Usage Arguments Details Examples

View source: R/httpuv.R

Description

Process HTTP requests and WebSocket messages. If there is nothing on R's call stack – if R is sitting idle at the command prompt – it is not necessary to call this function, because requests will be handled automatically. However, if R is executing code, then requests will not be handled until either the call stack is empty, or this function is called (or alternatively, run_now is called).

Usage

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service(timeoutMs = ifelse(interactive(), 100, 1000))

Arguments

timeoutMs

Approximate number of milliseconds to run before returning. It will return this duration has elapsed. If 0 or Inf, then the function will continually process requests without returning unless an error occurs. If NA, performs a non-blocking run without waiting.

Details

In previous versions of httpuv (1.3.5 and below), even if a server created by startServer exists, no requests were serviced unless and until service was called.

This function simply calls run_now(), so if your application schedules any later callbacks, they will be invoked.

Examples

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## Not run: 
while (TRUE) {
  service()
}

## End(Not run)

httpuv documentation built on June 19, 2018, 1:03 a.m.