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# Pleroma: A lightweight social networking server
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Plugs.RateLimiterTest do
use ExUnit.Case, async: true
use Plug.Test
alias Pleroma.Plugs.RateLimiter
import Pleroma.Factory
# Note: each example must work with separate buckets in order to prevent concurrency issues
test "init/1" do
limiter_name = :test_init
Pleroma.Config.put([:rate_limit, limiter_name], {1, 1})
assert {limiter_name, {1, 1}, []} == RateLimiter.init(limiter_name)
assert nil == RateLimiter.init(:foo)
end
test "ip/1" do
assert "127.0.0.1" == RateLimiter.ip(%{remote_ip: {127, 0, 0, 1}})
end
test "it restricts by opts" do
limiter_name = :test_opts
scale = 1000
limit = 5
Pleroma.Config.put([:rate_limit, limiter_name], {scale, limit})
opts = RateLimiter.init(limiter_name)
conn = conn(:get, "/")
bucket_name = "#{limiter_name}:#{RateLimiter.ip(conn)}"
conn = RateLimiter.call(conn, opts)
assert {1, 4, _, _, _} = ExRated.inspect_bucket(bucket_name, scale, limit)
conn = RateLimiter.call(conn, opts)
assert {2, 3, _, _, _} = ExRated.inspect_bucket(bucket_name, scale, limit)
conn = RateLimiter.call(conn, opts)
assert {3, 2, _, _, _} = ExRated.inspect_bucket(bucket_name, scale, limit)
conn = RateLimiter.call(conn, opts)
assert {4, 1, _, _, _} = ExRated.inspect_bucket(bucket_name, scale, limit)
conn = RateLimiter.call(conn, opts)
assert {5, 0, to_reset, _, _} = ExRated.inspect_bucket(bucket_name, scale, limit)
conn = RateLimiter.call(conn, opts)
assert %{"error" => "Throttled"} = Phoenix.ConnTest.json_response(conn, :too_many_requests)
assert conn.halted
Process.sleep(to_reset)
conn = conn(:get, "/")
conn = RateLimiter.call(conn, opts)
assert {1, 4, _, _, _} = ExRated.inspect_bucket(bucket_name, scale, limit)
refute conn.status == Plug.Conn.Status.code(:too_many_requests)
refute conn.resp_body
refute conn.halted
end
test "`bucket_name` option overrides default bucket name" do
limiter_name = :test_bucket_name
scale = 1000
limit = 5
Pleroma.Config.put([:rate_limit, limiter_name], {scale, limit})
base_bucket_name = "#{limiter_name}:group1"
opts = RateLimiter.init({limiter_name, bucket_name: base_bucket_name})
conn = conn(:get, "/")
default_bucket_name = "#{limiter_name}:#{RateLimiter.ip(conn)}"
customized_bucket_name = "#{base_bucket_name}:#{RateLimiter.ip(conn)}"
RateLimiter.call(conn, opts)
assert {1, 4, _, _, _} = ExRated.inspect_bucket(customized_bucket_name, scale, limit)
assert {0, 5, _, _, _} = ExRated.inspect_bucket(default_bucket_name, scale, limit)
end
test "`params` option appends specified params' values to bucket name" do
limiter_name = :test_params
scale = 1000
limit = 5
Pleroma.Config.put([:rate_limit, limiter_name], {scale, limit})
opts = RateLimiter.init({limiter_name, params: ["id"]})
id = "1"
conn = conn(:get, "/?id=#{id}")
conn = Plug.Conn.fetch_query_params(conn)
default_bucket_name = "#{limiter_name}:#{RateLimiter.ip(conn)}"
parametrized_bucket_name = "#{limiter_name}:#{id}:#{RateLimiter.ip(conn)}"
RateLimiter.call(conn, opts)
assert {1, 4, _, _, _} = ExRated.inspect_bucket(parametrized_bucket_name, scale, limit)
assert {0, 5, _, _, _} = ExRated.inspect_bucket(default_bucket_name, scale, limit)
end
test "it supports combination of options modifying bucket name" do
limiter_name = :test_options_combo
scale = 1000
limit = 5
Pleroma.Config.put([:rate_limit, limiter_name], {scale, limit})
base_bucket_name = "#{limiter_name}:group1"
opts = RateLimiter.init({limiter_name, bucket_name: base_bucket_name, params: ["id"]})
id = "100"
conn = conn(:get, "/?id=#{id}")
conn = Plug.Conn.fetch_query_params(conn)
default_bucket_name = "#{limiter_name}:#{RateLimiter.ip(conn)}"
parametrized_bucket_name = "#{base_bucket_name}:#{id}:#{RateLimiter.ip(conn)}"
RateLimiter.call(conn, opts)
assert {1, 4, _, _, _} = ExRated.inspect_bucket(parametrized_bucket_name, scale, limit)
assert {0, 5, _, _, _} = ExRated.inspect_bucket(default_bucket_name, scale, limit)
end
test "optional limits for authenticated users" do
limiter_name = :test_authenticated
Ecto.Adapters.SQL.Sandbox.checkout(Pleroma.Repo)
scale = 1000
limit = 5
Pleroma.Config.put([:rate_limit, limiter_name], [{1, 10}, {scale, limit}])
opts = RateLimiter.init(limiter_name)
user = insert(:user)
conn = conn(:get, "/") |> assign(:user, user)
bucket_name = "#{limiter_name}:#{user.id}"
conn = RateLimiter.call(conn, opts)
assert {1, 4, _, _, _} = ExRated.inspect_bucket(bucket_name, scale, limit)
conn = RateLimiter.call(conn, opts)
assert {2, 3, _, _, _} = ExRated.inspect_bucket(bucket_name, scale, limit)
conn = RateLimiter.call(conn, opts)
assert {3, 2, _, _, _} = ExRated.inspect_bucket(bucket_name, scale, limit)
conn = RateLimiter.call(conn, opts)
assert {4, 1, _, _, _} = ExRated.inspect_bucket(bucket_name, scale, limit)
conn = RateLimiter.call(conn, opts)
assert {5, 0, to_reset, _, _} = ExRated.inspect_bucket(bucket_name, scale, limit)
conn = RateLimiter.call(conn, opts)
assert %{"error" => "Throttled"} = Phoenix.ConnTest.json_response(conn, :too_many_requests)
assert conn.halted
Process.sleep(to_reset)
conn = conn(:get, "/") |> assign(:user, user)
conn = RateLimiter.call(conn, opts)
assert {1, 4, _, _, _} = ExRated.inspect_bucket(bucket_name, scale, limit)
refute conn.status == Plug.Conn.Status.code(:too_many_requests)
refute conn.resp_body
refute conn.halted
end
end
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