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lib/deception_router.ex
defmodule DeceptionRouter do
@moduledoc """
DeceptionRouter forward your bots here forever
"""
@char_space String.split(
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890_-/",
""
)
@max_links 10
@max_link_length 20
use Plug.Router
import Plug.Conn
def init(_options) do
[]
end
def call(conn, opts) do
links = generate_links()
conn =
conn
|> assign(:links, links)
super(conn, opts)
end
plug(:match)
plug(:dispatch)
match "/*sinkhole" do
links = conn.assigns.links
html = html_page(links)
conn
|> put_resp_content_type("text/html")
|> send_resp(200, html)
end
defp generate_links() do
num_links = Enum.random(5..@max_links)
for _ <- 0..(num_links - 1) do
generate_link()
end
end
defp generate_link() do
len_of_link = Enum.random(3..@max_link_length)
Enum.reduce(0..len_of_link, "", fn _, link ->
i = Enum.random(0..64)
char = Enum.at(@char_space, i)
link <> char
end)
end
defp html_page(links) do
# todo move this to a proper heex template to avoid injection?
"""
<html>
<body>
#{Enum.reduce(links, "", &render_link/2)}
</body>
</html>
"""
end
defp render_link(link, other_links) do
other_links <>
"""
<div>
<a href="/#{link}">#{link}</a>
</div>
"""
end
end