20259: Add documentation for banner and tooltip features
[arvados.git] / services / api / app / middlewares / arvados_api_token.rb
1 # Copyright (C) The Arvados Authors. All rights reserved.
2 #
3 # SPDX-License-Identifier: AGPL-3.0
4
5 # Perform api_token checking very early in the request process.  We want to do
6 # this in the Rack stack instead of in ApplicationController because
7 # websockets needs access to authentication but doesn't use any of the rails
8 # active dispatch infrastructure.
9 class ArvadosApiToken
10
11   # Create a new ArvadosApiToken handler
12   # +app+  The next layer of the Rack stack.
13   def initialize(app = nil, options = nil)
14     @app = app.respond_to?(:call) ? app : nil
15   end
16
17   def call env
18     request = Rack::Request.new(env)
19     params = request.params
20     remote_ip = env["action_dispatch.remote_ip"]
21
22     Thread.current[:request_starttime] = Time.now
23
24     remote = false
25     reader_tokens = nil
26     if params["remote"] && request.get? && (
27          request.path.start_with?('/arvados/v1/groups') ||
28          request.path.start_with?('/arvados/v1/api_client_authorizations/current') ||
29          request.path.start_with?('/arvados/v1/users/current'))
30       # Request from a remote API server, asking to validate a salted
31       # token.
32       remote = params["remote"]
33     elsif request.get? || params["_method"] == 'GET'
34       reader_tokens = params["reader_tokens"]
35       if reader_tokens.is_a? String
36         reader_tokens = SafeJSON.load(reader_tokens)
37       end
38     end
39
40     # Set current_user etc. based on the primary session token if a
41     # valid one is present. Otherwise, use the first valid token in
42     # reader_tokens.
43     accepted = false
44     auth = nil
45     [params["api_token"],
46      params["oauth_token"],
47      env["HTTP_AUTHORIZATION"].andand.match(/(OAuth2|Bearer) ([!-~]+)/).andand[2],
48      *reader_tokens,
49     ].each do |supplied|
50       next if !supplied
51       try_auth = ApiClientAuthorization.
52                  validate(token: supplied, remote: remote)
53       if try_auth.andand.user
54         auth = try_auth
55         accepted = supplied
56         break
57       end
58     end
59
60     Thread.current[:api_client_ip_address] = remote_ip
61     Thread.current[:api_client_authorization] = auth
62     Thread.current[:api_client_uuid] = auth.andand.api_client.andand.uuid
63     Thread.current[:api_client] = auth.andand.api_client
64     Thread.current[:token] = accepted
65     Thread.current[:user] = auth.andand.user
66
67     @app.call env if @app
68   end
69 end