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lib/http_proxy/utils/utils.ex
defmodule HttpProxy.Utils do
@moduledoc false
@str_list "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"
def rand_st(n) do
rand_s("", n)
end
defp rand_s(string, n) when n == 0 and is_bitstring(string), do: string
defp rand_s(string, n) when is_bitstring(string) do
additional = @str_list
|> String.codepoints
|> Enum.random
string = string <> additional
rand_s(string, n-1)
end
end