Merge branch 'openapi/validation-plug' into 'develop'

Ignore unexpected query params and ENUM values

Closes #1719

See merge request pleroma/pleroma!2468
This commit is contained in:
rinpatch 2020-05-05 12:08:58 +00:00
commit 5482a1f6ef
13 changed files with 173 additions and 7 deletions

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@ -653,6 +653,8 @@
profiles: %{local: false, remote: false},
activities: %{local: false, remote: false}
config :pleroma, Pleroma.Web.ApiSpec.CastAndValidate, strict: false
# Import environment specific config. This must remain at the bottom
# of this file so it overrides the configuration defined above.
import_config "#{Mix.env()}.exs"

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@ -3195,5 +3195,19 @@
]
}
]
},
%{
group: :pleroma,
key: Pleroma.Web.ApiSpec.CastAndValidate,
type: :group,
children: [
%{
key: :strict,
type: :boolean,
description:
"Enables strict input validation (useful in development, not recommended in production)",
suggestions: [false]
}
]
}
]

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@ -52,6 +52,8 @@
hostname: "localhost",
pool_size: 10
config :pleroma, Pleroma.Web.ApiSpec.CastAndValidate, strict: true
if File.exists?("./config/dev.secret.exs") do
import_config "dev.secret.exs"
else

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@ -96,6 +96,8 @@
config :pleroma, Pleroma.Plugs.RemoteIp, enabled: false
config :pleroma, Pleroma.Web.ApiSpec.CastAndValidate, strict: true
if File.exists?("./config/test.secret.exs") do
import_config "test.secret.exs"
else

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@ -924,4 +924,8 @@ Restrict access for unauthenticated users to timelines (public and federate), us
* `remote`
* `activities` - statuses
* `local`
* `remote`
* `remote`
## Pleroma.Web.ApiSpec.CastAndValidate
* `:strict` a boolean, enables strict input validation (useful in development, not recommended in production). Defaults to `false`.

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@ -0,0 +1,139 @@
# Pleroma: A lightweight social networking server
# Copyright © 2019-2020 Moxley Stratton, Mike Buhot <https://github.com/open-api-spex/open_api_spex>, MPL-2.0
# Copyright © 2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ApiSpec.CastAndValidate do
@moduledoc """
This plug is based on [`OpenApiSpex.Plug.CastAndValidate`]
(https://github.com/open-api-spex/open_api_spex/blob/master/lib/open_api_spex/plug/cast_and_validate.ex).
The main difference is ignoring unexpected query params instead of throwing
an error and a config option (`[Pleroma.Web.ApiSpec.CastAndValidate, :strict]`)
to disable this behavior. Also, the default rendering error module
is `Pleroma.Web.ApiSpec.RenderError`.
"""
@behaviour Plug
alias Plug.Conn
@impl Plug
def init(opts) do
opts
|> Map.new()
|> Map.put_new(:render_error, Pleroma.Web.ApiSpec.RenderError)
end
@impl Plug
def call(%{private: %{open_api_spex: private_data}} = conn, %{
operation_id: operation_id,
render_error: render_error
}) do
spec = private_data.spec
operation = private_data.operation_lookup[operation_id]
content_type =
case Conn.get_req_header(conn, "content-type") do
[header_value | _] ->
header_value
|> String.split(";")
|> List.first()
_ ->
nil
end
private_data = Map.put(private_data, :operation_id, operation_id)
conn = Conn.put_private(conn, :open_api_spex, private_data)
case cast_and_validate(spec, operation, conn, content_type, strict?()) do
{:ok, conn} ->
conn
{:error, reason} ->
opts = render_error.init(reason)
conn
|> render_error.call(opts)
|> Plug.Conn.halt()
end
end
def call(
%{
private: %{
phoenix_controller: controller,
phoenix_action: action,
open_api_spex: private_data
}
} = conn,
opts
) do
operation =
case private_data.operation_lookup[{controller, action}] do
nil ->
operation_id = controller.open_api_operation(action).operationId
operation = private_data.operation_lookup[operation_id]
operation_lookup =
private_data.operation_lookup
|> Map.put({controller, action}, operation)
OpenApiSpex.Plug.Cache.adapter().put(
private_data.spec_module,
{private_data.spec, operation_lookup}
)
operation
operation ->
operation
end
if operation.operationId do
call(conn, Map.put(opts, :operation_id, operation.operationId))
else
raise "operationId was not found in action API spec"
end
end
def call(conn, opts), do: OpenApiSpex.Plug.CastAndValidate.call(conn, opts)
defp cast_and_validate(spec, operation, conn, content_type, true = _strict) do
OpenApiSpex.cast_and_validate(spec, operation, conn, content_type)
end
defp cast_and_validate(spec, operation, conn, content_type, false = _strict) do
case OpenApiSpex.cast_and_validate(spec, operation, conn, content_type) do
{:ok, conn} ->
{:ok, conn}
# Remove unexpected query params and cast/validate again
{:error, errors} ->
query_params =
Enum.reduce(errors, conn.query_params, fn
%{reason: :unexpected_field, name: name, path: [name]}, params ->
Map.delete(params, name)
%{reason: :invalid_enum, name: nil, path: path, value: value}, params ->
path = path |> Enum.reverse() |> tl() |> Enum.reverse() |> list_items_to_string()
update_in(params, path, &List.delete(&1, value))
_, params ->
params
end)
conn = %Conn{conn | query_params: query_params}
OpenApiSpex.cast_and_validate(spec, operation, conn, content_type)
end
end
defp list_items_to_string(list) do
Enum.map(list, fn
i when is_atom(i) -> to_string(i)
i -> i
end)
end
defp strict?, do: Pleroma.Config.get([__MODULE__, :strict], false)
end

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@ -17,6 +17,9 @@ def init(opts), do: opts
def call(conn, errors) do
errors =
Enum.map(errors, fn
%{name: nil, reason: :invalid_enum} = err ->
%OpenApiSpex.Cast.Error{err | name: err.value}
%{name: nil} = err ->
%OpenApiSpex.Cast.Error{err | name: List.last(err.path)}

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@ -27,7 +27,7 @@ defmodule Pleroma.Web.MastodonAPI.AccountController do
alias Pleroma.Web.OAuth.Token
alias Pleroma.Web.TwitterAPI.TwitterAPI
plug(OpenApiSpex.Plug.CastAndValidate, render_error: Pleroma.Web.ApiSpec.RenderError)
plug(Pleroma.Web.ApiSpec.CastAndValidate)
plug(:skip_plug, [OAuthScopesPlug, EnsurePublicOrAuthenticatedPlug] when action == :create)

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@ -22,7 +22,7 @@ defmodule Pleroma.Web.MastodonAPI.AppController do
plug(OAuthScopesPlug, %{scopes: ["read"]} when action == :verify_credentials)
plug(OpenApiSpex.Plug.CastAndValidate)
plug(Pleroma.Web.ApiSpec.CastAndValidate)
@local_mastodon_name "Mastodon-Local"

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@ -5,7 +5,7 @@
defmodule Pleroma.Web.MastodonAPI.CustomEmojiController do
use Pleroma.Web, :controller
plug(OpenApiSpex.Plug.CastAndValidate)
plug(Pleroma.Web.ApiSpec.CastAndValidate)
plug(
:skip_plug,

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@ -8,7 +8,7 @@ defmodule Pleroma.Web.MastodonAPI.DomainBlockController do
alias Pleroma.Plugs.OAuthScopesPlug
alias Pleroma.User
plug(OpenApiSpex.Plug.CastAndValidate)
plug(Pleroma.Web.ApiSpec.CastAndValidate)
defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.DomainBlockOperation
plug(

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@ -13,7 +13,7 @@ defmodule Pleroma.Web.MastodonAPI.NotificationController do
@oauth_read_actions [:show, :index]
plug(OpenApiSpex.Plug.CastAndValidate, render_error: Pleroma.Web.ApiSpec.RenderError)
plug(Pleroma.Web.ApiSpec.CastAndValidate)
plug(
OAuthScopesPlug,

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@ -9,7 +9,7 @@ defmodule Pleroma.Web.MastodonAPI.ReportController do
action_fallback(Pleroma.Web.MastodonAPI.FallbackController)
plug(OpenApiSpex.Plug.CastAndValidate, render_error: Pleroma.Web.ApiSpec.RenderError)
plug(Pleroma.Web.ApiSpec.CastAndValidate)
plug(OAuthScopesPlug, %{scopes: ["write:reports"]} when action == :create)
defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.ReportOperation