279 lines
9.1 KiB
Elixir
279 lines
9.1 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.Plugs.RateLimiterTest do
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use Pleroma.Web.ConnCase
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alias Phoenix.ConnTest
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alias Pleroma.Web.Plugs.RateLimiter
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alias Plug.Conn
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import Pleroma.Factory
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import Pleroma.Tests.Helpers, only: [clear_config: 1, clear_config: 2]
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# Note: each example must work with separate buckets in order to prevent concurrency issues
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setup do: clear_config([Pleroma.Web.Endpoint, :http, :ip])
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setup do: clear_config(:rate_limit)
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describe "config" do
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@limiter_name :test_init
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setup do: clear_config([Pleroma.Web.Plugs.RemoteIp, :enabled])
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test "config is required for plug to work" do
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clear_config([:rate_limit, @limiter_name], {1, 1})
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clear_config([Pleroma.Web.Endpoint, :http, :ip], {8, 8, 8, 8})
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assert %{limits: {1, 1}, name: :test_init, opts: [name: :test_init]} ==
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[name: @limiter_name]
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|> RateLimiter.init()
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|> RateLimiter.action_settings()
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assert nil ==
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[name: :nonexisting_limiter]
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|> RateLimiter.init()
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|> RateLimiter.action_settings()
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end
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end
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test "it is disabled if it remote ip plug is enabled but no remote ip is found" do
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assert RateLimiter.disabled?(Conn.assign(build_conn(), :remote_ip_found, false))
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end
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test "it is enabled if remote ip found" do
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refute RateLimiter.disabled?(Conn.assign(build_conn(), :remote_ip_found, true))
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end
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test "it is enabled if remote_ip_found flag doesn't exist" do
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refute RateLimiter.disabled?(build_conn())
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end
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test "it restricts based on config values" do
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limiter_name = :test_plug_opts
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scale = 80
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limit = 5
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clear_config([Pleroma.Web.Endpoint, :http, :ip], {127, 0, 0, 1})
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clear_config([:rate_limit, limiter_name], {scale, limit})
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plug_opts = RateLimiter.init(name: limiter_name)
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conn = build_conn(:get, "/")
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for _ <- 1..5 do
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conn_limited = RateLimiter.call(conn, plug_opts)
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refute conn_limited.status == Conn.Status.code(:too_many_requests)
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refute conn_limited.resp_body
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refute conn_limited.halted
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end
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conn_limited = RateLimiter.call(conn, plug_opts)
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assert %{"error" => "Throttled"} = ConnTest.json_response(conn_limited, :too_many_requests)
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assert conn_limited.halted
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expire_ttl(conn, limiter_name)
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for _ <- 1..5 do
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conn_limited = RateLimiter.call(conn, plug_opts)
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refute conn_limited.status == Conn.Status.code(:too_many_requests)
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refute conn_limited.resp_body
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refute conn_limited.halted
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end
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conn_limited = RateLimiter.call(conn, plug_opts)
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assert %{"error" => "Throttled"} = ConnTest.json_response(conn_limited, :too_many_requests)
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assert conn_limited.halted
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end
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describe "options" do
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test "`bucket_name` option overrides default bucket name" do
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limiter_name = :test_bucket_name
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clear_config([:rate_limit, limiter_name], {1000, 5})
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clear_config([Pleroma.Web.Endpoint, :http, :ip], {8, 8, 8, 8})
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base_bucket_name = "#{limiter_name}:group1"
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plug_opts = RateLimiter.init(name: limiter_name, bucket_name: base_bucket_name)
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conn = build_conn(:get, "/")
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RateLimiter.call(conn, plug_opts)
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assert {1, 4} = RateLimiter.inspect_bucket(conn, base_bucket_name, plug_opts)
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assert {:error, :not_found} = RateLimiter.inspect_bucket(conn, limiter_name, plug_opts)
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end
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test "`params` option allows different queries to be tracked independently" do
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limiter_name = :test_params
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clear_config([:rate_limit, limiter_name], {1000, 5})
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clear_config([Pleroma.Web.Endpoint, :http, :ip], {8, 8, 8, 8})
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plug_opts = RateLimiter.init(name: limiter_name, params: ["id"])
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conn = build_conn(:get, "/?id=1")
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conn = Conn.fetch_query_params(conn)
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conn_2 = build_conn(:get, "/?id=2")
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RateLimiter.call(conn, plug_opts)
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assert {1, 4} = RateLimiter.inspect_bucket(conn, limiter_name, plug_opts)
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assert {0, 5} = RateLimiter.inspect_bucket(conn_2, limiter_name, plug_opts)
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end
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test "it supports combination of options modifying bucket name" do
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limiter_name = :test_options_combo
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clear_config([:rate_limit, limiter_name], {1000, 5})
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clear_config([Pleroma.Web.Endpoint, :http, :ip], {8, 8, 8, 8})
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base_bucket_name = "#{limiter_name}:group1"
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plug_opts =
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RateLimiter.init(name: limiter_name, bucket_name: base_bucket_name, params: ["id"])
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id = "100"
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conn = build_conn(:get, "/?id=#{id}")
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conn = Conn.fetch_query_params(conn)
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conn_2 = build_conn(:get, "/?id=#{101}")
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RateLimiter.call(conn, plug_opts)
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assert {1, 4} = RateLimiter.inspect_bucket(conn, base_bucket_name, plug_opts)
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assert {0, 5} = RateLimiter.inspect_bucket(conn_2, base_bucket_name, plug_opts)
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end
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end
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describe "unauthenticated users" do
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@tag :erratic
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test "are restricted based on remote IP" do
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limiter_name = :test_unauthenticated
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clear_config([:rate_limit, limiter_name], [{1000, 5}, {1, 10}])
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clear_config([Pleroma.Web.Endpoint, :http, :ip], {8, 8, 8, 8})
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plug_opts = RateLimiter.init(name: limiter_name)
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conn = %{build_conn(:get, "/") | remote_ip: {127, 0, 0, 2}}
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conn_2 = %{build_conn(:get, "/") | remote_ip: {127, 0, 0, 3}}
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for i <- 1..5 do
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conn = RateLimiter.call(conn, plug_opts)
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assert {^i, _} = RateLimiter.inspect_bucket(conn, limiter_name, plug_opts)
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refute conn.halted
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end
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conn = RateLimiter.call(conn, plug_opts)
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assert %{"error" => "Throttled"} = ConnTest.json_response(conn, :too_many_requests)
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assert conn.halted
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conn_2 = RateLimiter.call(conn_2, plug_opts)
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assert {1, 4} = RateLimiter.inspect_bucket(conn_2, limiter_name, plug_opts)
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refute conn_2.status == Conn.Status.code(:too_many_requests)
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refute conn_2.resp_body
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refute conn_2.halted
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end
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end
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describe "authenticated users" do
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setup do
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Ecto.Adapters.SQL.Sandbox.checkout(Pleroma.Repo)
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:ok
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end
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@tag :erratic
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test "can have limits separate from unauthenticated connections" do
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limiter_name = :test_authenticated1
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scale = 50
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limit = 5
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clear_config([Pleroma.Web.Endpoint, :http, :ip], {8, 8, 8, 8})
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clear_config([:rate_limit, limiter_name], [{1000, 1}, {scale, limit}])
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plug_opts = RateLimiter.init(name: limiter_name)
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user = insert(:user)
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conn = build_conn(:get, "/") |> assign(:user, user)
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for i <- 1..5 do
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conn = RateLimiter.call(conn, plug_opts)
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assert {^i, _} = RateLimiter.inspect_bucket(conn, limiter_name, plug_opts)
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refute conn.halted
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end
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conn = RateLimiter.call(conn, plug_opts)
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assert %{"error" => "Throttled"} = ConnTest.json_response(conn, :too_many_requests)
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assert conn.halted
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end
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@tag :erratic
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test "different users are counted independently" do
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limiter_name = :test_authenticated2
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clear_config([:rate_limit, limiter_name], [{1, 10}, {1000, 5}])
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clear_config([Pleroma.Web.Endpoint, :http, :ip], {8, 8, 8, 8})
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plug_opts = RateLimiter.init(name: limiter_name)
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user = insert(:user)
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conn = build_conn(:get, "/") |> assign(:user, user)
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user_2 = insert(:user)
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conn_2 = build_conn(:get, "/") |> assign(:user, user_2)
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for i <- 1..5 do
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conn = RateLimiter.call(conn, plug_opts)
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assert {^i, _} = RateLimiter.inspect_bucket(conn, limiter_name, plug_opts)
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end
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conn = RateLimiter.call(conn, plug_opts)
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assert %{"error" => "Throttled"} = ConnTest.json_response(conn, :too_many_requests)
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assert conn.halted
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conn_2 = RateLimiter.call(conn_2, plug_opts)
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assert {1, 4} = RateLimiter.inspect_bucket(conn_2, limiter_name, plug_opts)
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refute conn_2.status == Conn.Status.code(:too_many_requests)
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refute conn_2.resp_body
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refute conn_2.halted
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end
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end
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test "doesn't crash due to a race condition when multiple requests are made at the same time and the bucket is not yet initialized" do
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limiter_name = :test_race_condition
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clear_config([:rate_limit, limiter_name], {1000, 5})
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clear_config([Pleroma.Web.Endpoint, :http, :ip], {8, 8, 8, 8})
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opts = RateLimiter.init(name: limiter_name)
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conn = build_conn(:get, "/")
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conn_2 = build_conn(:get, "/")
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%Task{pid: pid1} =
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task1 =
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Task.async(fn ->
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receive do
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:process2_up ->
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RateLimiter.call(conn, opts)
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end
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end)
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task2 =
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Task.async(fn ->
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send(pid1, :process2_up)
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RateLimiter.call(conn_2, opts)
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end)
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Task.await(task1)
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Task.await(task2)
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refute {:err, :not_found} == RateLimiter.inspect_bucket(conn, limiter_name, opts)
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end
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def expire_ttl(%{remote_ip: remote_ip} = _conn, bucket_name_root) do
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bucket_name = "anon:#{bucket_name_root}" |> String.to_atom()
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key_name = "ip::#{remote_ip |> Tuple.to_list() |> Enum.join(".")}"
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{:ok, bucket_value} = Cachex.get(bucket_name, key_name)
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Cachex.put(bucket_name, key_name, bucket_value, ttl: -1)
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end
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end
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