Nothing
# borrowed from
# https://github.com/r-lib/evaluate/blob/f0119259b3a1d335e399ac2235e91bb0e5b769b6/R/traceback.r#L29
try_capture_stack = function(expr, env = environment()) {
quoted_code = quote(expr)
capture_calls = function(e) {
e$calls = utils::head(sys.calls()[-seq_len(frame + 7)], -2)
signalCondition(e)
}
frame = sys.nframe()
tryCatch(
withCallingHandlers(eval(quoted_code, env), error = capture_calls),
error = identity
)
}
get_traceback = function(err) {
# no expanded traceback
if (inherits(err, "try-error")) {
condition = attr(err, "condition")[["call"]]
list(
error = condition[["message"]],
call = as.character(condition[["call"]]),
traceback = list()
)
} else {
err_msg = err$message
stack_msg = lapply(err$calls, function(x) utils::capture.output(print(x)))
call_msg = utils::capture.output(print(err$call))
list(error = err_msg, call = call_msg, traceback = stack_msg)
}
}
guess_mime = function(file_path, content_type = NULL) {
if (is.null(content_type))
content_type = mime::guess_type(file_path)
content_type
}
compact_list = function(x) {
x[lengths(x) > 0L]
}
is_string = function(x) {
is.character(x) && length(x) == 1L
}
is_path = function(path) {
is_string(path) && startsWith(path, "/")
}
to_string = function(x) {
if (is.raw(x)) {
x = rawToChar(x)
}
paste(as.character(x), collapse = "\n")
}
list_named = function(length = 0, names = paste0("V", character(length))) {
if (!(is.numeric(length) && (length(length) == 1) && is.finite(length)))
stop("invalid 'length' argument - should be finite numeric")
if (length == 0)
names = character(0)
if (!is.character(names) || (length(names) != length))
stop("invalid 'names' argument - should be character of size 'length'")
if (length > 0) names = paste0('V', as.character(seq_len(length)))
setNames(vector("list", length), names)
}
port_is_taken = function(port) {
tryCatch({
con = suppressWarnings(socketConnection(host = "localhost", port, open = "r", timeout = 1L))
on.exit(close(con))
TRUE
},
error = function(e) { FALSE }
)
}
find_port = function(tries = 50) {
port = 6311 # default Rserve port
min_port = 49152 # min port
max_port = 65535 # max port
for (i in seq_len(tries)) {
if (!port_is_taken(port)) {
return(port)
}
port = trunc(runif(1, min_port, max_port))
}
return(NULL)
}
# url_encode = function(x) {
# vapply(x, utils::URLencode, "", reserved = TRUE, USE.NAMES = FALSE)
# }
# url_decode = function(x) {
# vapply(x, utils::URLdecode, "", USE.NAMES = FALSE)
# }
# nocov start
compile_all = function(env = .GlobalEnv, env_done = list(), options = list(optimize = 3),
verbose = Sys.getenv("RESTRSERVE_COMPILE_VERBOSE", unset = "FALSE")) {
verbose = as.logical(verbose)
if (verbose) message(sprintf("checking env %s", environmentName(env)))
for (obj_name in ls(envir = env)) {
if (verbose) message(sprintf("inspecting object '%s'", obj_name))
obj = env[[obj_name]]
if (is.function(obj)) {
status = try({
env[[obj_name]] = compiler::cmpfun(obj, options)
}, silent = TRUE)
if (verbose) {
if (!inherits(status, "try-error")) {
message(sprintf("compiled %s from '%s' env", obj_name, environmentName(env)))
} else {
message(sprintf("NOT compiled %s from '%s' env", obj_name, environmentName(env)))
}
}
}
if (is.environment(obj)) {
already_compiled = vapply(env_done, function(e) identical(e, obj), FUN.VALUE = FALSE, USE.NAMES = FALSE)
already_compiled = any(already_compiled)
if (!already_compiled) {
compile_all(obj, append(env_done, obj), options)
}
}
}
}
# nocov end
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.