mobilizon/lib/web/controllers/application_controller.ex

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defmodule Mobilizon.Web.ApplicationController do
use Mobilizon.Web, :controller
alias Mobilizon.Applications.Application
alias Mobilizon.Service.Auth.Applications
plug(:put_layout, false)
import Mobilizon.Web.Gettext, only: [dgettext: 2]
require Logger
@doc """
Create an application
"""
@spec create_application(Plug.Conn.t(), map()) :: Plug.Conn.t()
def create_application(
conn,
%{"name" => name, "redirect_uris" => redirect_uris, "scope" => scope} = args
) do
ip = conn.remote_ip |> :inet.ntoa() |> to_string()
case Hammer.check_rate(
"create_application:#{ip}",
60_000,
10
) do
{:allow, _} ->
case Applications.create(
name,
String.split(redirect_uris, "\n"),
scope,
Map.get(args, "website")
) do
{:ok, %Application{} = app} ->
conn
|> Plug.Conn.put_resp_header("cache-control", "no-store")
|> json(
Map.take(app, [:name, :website, :redirect_uris, :client_id, :client_secret, :scope])
)
{:error, :invalid_scope} ->
conn
|> Plug.Conn.put_status(400)
|> json(%{
"error" => "invalid_scope",
"error_description" =>
dgettext(
"errors",
"The scope parameter is not a space separated list of valid scopes"
)
})
{:error, error} ->
Logger.error(inspect(error))
conn
|> Plug.Conn.put_status(500)
|> json(%{
"error" => "server_error",
"error_description" =>
dgettext(
"errors",
"Impossible to create application."
)
})
end
{:deny, _} ->
conn
|> Plug.Conn.put_status(429)
|> json(%{
"error" => "slow_down",
"error_description" =>
dgettext(
"errors",
"Too many requests"
)
})
end
end
def create_application(conn, _args) do
conn
|> Plug.Conn.put_status(400)
|> json(%{
"error" => "invalid_request",
"error_description" =>
dgettext(
"errors",
"All of name, scope and redirect_uri parameters are required to create an application"
)
})
end
@doc """
Authorize
"""
@spec authorize(Plug.Conn.t(), map()) :: Plug.Conn.t()
def authorize(
conn,
_args
) do
conn = fetch_query_params(conn)
client_id = conn.query_params["client_id"]
redirect_uri = conn.query_params["redirect_uri"]
state = conn.query_params["state"]
scope = conn.query_params["scope"]
if is_binary(client_id) and is_binary(redirect_uri) and valid_uri?(redirect_uri) and
is_binary(state) and is_binary(scope) do
redirect(conn,
to:
Routes.page_path(conn, :authorize,
client_id: client_id,
redirect_uri: redirect_uri,
scope: scope,
state: state
)
)
else
if is_binary(redirect_uri) and valid_uri?(redirect_uri) do
redirect(conn,
external:
append_parameters(redirect_uri,
error: "invalid_request",
error_description:
dgettext(
"errors",
"You need to specify client_id, redirect_uri, scope and state to autorize an application"
)
)
)
else
send_resp(
conn,
400,
dgettext(
"errors",
"You need to provide a valid redirect_uri to autorize an application"
)
)
end
end
end
def device_code(conn, %{"client_id" => client_id, "scope" => scope}) do
case Applications.register_device_code(client_id, scope) do
{:ok, res} when is_map(res) ->
conn
|> Plug.Conn.put_resp_header("cache-control", "no-store")
|> json(res)
{:error, :scope_not_included} ->
conn
|> Plug.Conn.put_status(400)
|> json(%{
"error" => "invalid_scope",
"error_description" =>
dgettext(
"errors",
"The given scope is not in the list of the app declared scopes"
)
})
{:error, :application_not_found} ->
conn
|> Plug.Conn.put_status(400)
|> json(%{
"error" => "invalid_client",
"error_description" =>
dgettext(
"errors",
"No application was found with this client_id"
)
})
{:error, %Ecto.Changeset{} = err} ->
Logger.error(inspect(err))
conn
|> Plug.Conn.put_status(500)
|> json(%{
"error" => "server_error",
"error_description" =>
dgettext(
"errors",
"Unable to produce device code"
)
})
end
end
def device_code(conn, _args) do
conn
|> Plug.Conn.put_status(400)
|> json(%{
"error" => "invalid_request",
"error_description" =>
dgettext(
"errors",
"You need to pass both client_id and scope as parameters to obtain a device code"
)
})
end
@spec generate_access_token(Plug.Conn.t(), map()) :: Plug.Conn.t()
def generate_access_token(conn, %{
"client_id" => client_id,
"client_secret" => client_secret,
"code" => code,
"redirect_uri" => redirect_uri,
"scope" => scope,
"grant_type" => "authorization_code"
}) do
case do_generate_access_token(client_id, client_secret, code, redirect_uri, scope) do
{:ok, token} ->
conn
|> Plug.Conn.put_resp_header("cache-control", "no-store")
|> json(token)
{:error, code, msg} ->
Logger.debug(msg)
conn
|> Plug.Conn.put_status(400)
|> json(%{
"error" => to_string(code),
"error_description" => msg
})
end
end
def generate_access_token(conn, %{
"client_id" => client_id,
"device_code" => device_code,
"grant_type" => "urn:ietf:params:oauth:grant-type:device_code"
}) do
case Applications.generate_access_token_for_device_flow(client_id, device_code) do
{:ok, res} ->
conn
|> Plug.Conn.put_resp_header("cache-control", "no-store")
|> json(res)
{:error, :incorrect_device_code} ->
conn
|> Plug.Conn.put_status(400)
|> json(%{
"error" => "invalid_grant",
"error_description" =>
dgettext(
"errors",
"The client_id provided or the device_code associated is invalid"
)
})
{:error, :pending, interval} ->
case Hammer.check_rate(
"generate_device_access_token:#{client_id}:#{device_code}",
interval * 1_000,
1
) do
{:allow, _} ->
conn
|> Plug.Conn.put_status(400)
|> json(%{
"error" => "authorization_pending",
"error_description" =>
dgettext(
"errors",
"The authorization request is still pending"
)
})
{:deny, _} ->
conn
|> Plug.Conn.put_status(400)
|> json(%{
"error" => "slow_down",
"error_description" =>
dgettext(
"errors",
"Please slow down the rate of your requests"
)
})
end
{:error, :access_denied} ->
conn
|> Plug.Conn.put_status(400)
|> json(%{
"error" => "access_denied",
"error_description" =>
dgettext(
"errors",
"The user rejected the requested authorization"
)
})
{:error, :expired} ->
conn
|> Plug.Conn.put_status(400)
|> json(%{
"error" => "expired_token",
"error_description" =>
dgettext(
"errors",
"The given device_code has expired"
)
})
end
end
def generate_access_token(conn, %{
"refresh_token" => refresh_token,
"grant_type" => "refresh_token",
"client_id" => client_id,
"client_secret" => client_secret
}) do
case Applications.refresh_tokens(refresh_token, client_id, client_secret) do
{:ok, res} ->
conn
|> Plug.Conn.put_resp_header("cache-control", "no-store")
|> json(res)
{:error, :invalid_client_credentials} ->
conn
|> Plug.Conn.put_status(400)
|> json(%{
"error" => "invalid_client",
"error_description" => dgettext("errors", "Invalid client credentials provided")
})
{:error, :invalid_refresh_token} ->
conn
|> Plug.Conn.put_status(400)
|> json(%{
"error" => "invalid_grant",
"error_description" => dgettext("errors", "Invalid refresh token provided")
})
{:error, err} when is_atom(err) ->
conn
|> Plug.Conn.put_status(500)
|> json(%{
"error" => "server_error",
"error_description" => to_string(err)
})
end
end
def generate_access_token(conn, _args) do
conn
|> Plug.Conn.put_status(400)
|> json(%{
"error" => "invalid_request",
"error_description" =>
dgettext(
"errors",
"Incorrect parameters sent. You need to provide at least the grant_type and client_id parameters, depending on the grant type being used."
)
})
end
def revoke_token(conn, %{"token" => token} = _args) do
case Applications.revoke_token(token) do
{:ok, _res} ->
send_resp(conn, 200, "")
{:error, _, _, _} ->
conn
|> Plug.Conn.put_status(500)
|> json(%{
"error" => "server_error",
"error_description" => dgettext("errors", "Unable to revoke token")
})
{:error, :token_not_found} ->
conn
|> Plug.Conn.put_status(:not_found)
|> json(%{
"error" => "invalid_request",
"error_description" => dgettext("errors", "Token not found")
})
end
end
@spec do_generate_access_token(String.t(), String.t(), String.t(), String.t(), String.t()) ::
{:ok, Applications.access_token_details()} | {:error, atom(), String.t()}
defp do_generate_access_token(client_id, client_secret, code, redirect_uri, scope) do
case Applications.generate_access_token(
client_id,
client_secret,
code,
redirect_uri,
scope
) do
{:ok, token} ->
{:ok, token}
{:error, :application_not_found} ->
{:error, :invalid_request,
dgettext("errors", "No application was found with this client_id")}
{:error, :redirect_uri_not_in_allowed} ->
{:error, :invalid_request, dgettext("errors", "This redirect URI is not allowed")}
{:error, :invalid_or_expired} ->
{:error, :invalid_grant, dgettext("errors", "The provided code is invalid or expired")}
{:error, :provided_code_does_not_match} ->
{:error, :invalid_grant,
dgettext("errors", "The provided client_id does not match the provided code")}
{:error, :invalid_client_secret} ->
{:error, :invalid_client, dgettext("errors", "The provided client_secret is invalid")}
{:error, :scope_not_included} ->
{:error, :invalid_scope,
dgettext(
"errors",
"The provided scope is invalid or not included in the app declared scopes"
)}
end
end
defp valid_uri?(url) do
uri = URI.parse(url)
uri.scheme != nil and uri.host =~ "."
end
@spec append_parameters(String.t(), Enum.t()) :: String.t()
defp append_parameters(uri_str, parameters) do
query_parameters = URI.encode_query(parameters)
case URI.parse(uri_str) do
%URI{query: nil} = uri ->
uri
|> URI.merge(%URI{query: query_parameters})
|> URI.to_string()
uri ->
"#{URI.to_string(uri)}&#{query_parameters}"
end
end
end