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jcheng5/reentrancy-rhttpd.R

Created May 6, 2020 03:26
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reentrancy-rhttpd.R
assign("msg", local({
i <- 0
function(url, ...) {
i <<- i + 1
on.exit(i <<- i - 1)
if (i > 1) {
message("reentrancy detected!")
return("reentrancy detected!")
}
cat("") # Calls R_ProcessEvents()
list("success", "text/plain")
}
}), tools:::.httpd.handlers.env)
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