discourse/spec/requests/application_controller_spec.rb

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# frozen_string_literal: true
RSpec.describe ApplicationController do
describe "#redirect_to_login_if_required" do
let(:admin) { Fabricate(:admin) }
before do
admin # to skip welcome wizard at home page `/`
SiteSetting.login_required = true
end
it "should never cache a login redirect" do
get "/"
expect(response.headers["Cache-Control"]).to eq("no-cache, no-store")
end
it "should redirect to login normally" do
get "/"
expect(response).to redirect_to("/login")
end
it "should redirect to SSO if enabled" do
FEATURE: Rename 'Discourse SSO' to DiscourseConnect (#11978) The 'Discourse SSO' protocol is being rebranded to DiscourseConnect. This should help to reduce confusion when 'SSO' is used in the generic sense. This commit aims to: - Rename `sso_` site settings. DiscourseConnect specific ones are prefixed `discourse_connect_`. Generic settings are prefixed `auth_` - Add (server-side-only) backwards compatibility for the old setting names, with deprecation notices - Copy `site_settings` database records to the new names - Rename relevant translation keys - Update relevant translations This commit does **not** aim to: - Rename any Ruby classes or methods. This might be done in a future commit - Change any URLs. This would break existing integrations - Make any changes to the protocol. This would break existing integrations - Change any functionality. Further normalization across DiscourseConnect and other auth methods will be done separately The risks are: - There is no backwards compatibility for site settings on the client-side. Accessing auth-related site settings in Javascript is fairly rare, and an error on the client side would not be security-critical. - If a plugin is monkey-patching parts of the auth process, changes to locale keys could cause broken error messages. This should also be unlikely. The old site setting names remain functional, so security-related overrides will remain working. A follow-up commit will be made with a post-deploy migration to delete the old `site_settings` rows.
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SiteSetting.discourse_connect_url = "http://someurl.com"
SiteSetting.enable_discourse_connect = true
get "/"
expect(response).to redirect_to("/session/sso")
end
it "should redirect to authenticator if only one, and local logins disabled" do
# Local logins and google enabled, direct to login UI
SiteSetting.enable_google_oauth2_logins = true
get "/"
expect(response).to redirect_to("/login")
# Only google enabled, login immediately
SiteSetting.enable_local_logins = false
get "/"
expect(response).to redirect_to("/auth/google_oauth2")
# Google and GitHub enabled, direct to login UI
SiteSetting.enable_github_logins = true
get "/"
expect(response).to redirect_to("/login")
end
FEATURE: Rename 'Discourse SSO' to DiscourseConnect (#11978) The 'Discourse SSO' protocol is being rebranded to DiscourseConnect. This should help to reduce confusion when 'SSO' is used in the generic sense. This commit aims to: - Rename `sso_` site settings. DiscourseConnect specific ones are prefixed `discourse_connect_`. Generic settings are prefixed `auth_` - Add (server-side-only) backwards compatibility for the old setting names, with deprecation notices - Copy `site_settings` database records to the new names - Rename relevant translation keys - Update relevant translations This commit does **not** aim to: - Rename any Ruby classes or methods. This might be done in a future commit - Change any URLs. This would break existing integrations - Make any changes to the protocol. This would break existing integrations - Change any functionality. Further normalization across DiscourseConnect and other auth methods will be done separately The risks are: - There is no backwards compatibility for site settings on the client-side. Accessing auth-related site settings in Javascript is fairly rare, and an error on the client side would not be security-critical. - If a plugin is monkey-patching parts of the auth process, changes to locale keys could cause broken error messages. This should also be unlikely. The old site setting names remain functional, so security-related overrides will remain working. A follow-up commit will be made with a post-deploy migration to delete the old `site_settings` rows.
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it "should not redirect to SSO when auth_immediately is disabled" do
SiteSetting.auth_immediately = false
SiteSetting.discourse_connect_url = "http://someurl.com"
SiteSetting.enable_discourse_connect = true
get "/"
expect(response).to redirect_to("/login")
end
FEATURE: Rename 'Discourse SSO' to DiscourseConnect (#11978) The 'Discourse SSO' protocol is being rebranded to DiscourseConnect. This should help to reduce confusion when 'SSO' is used in the generic sense. This commit aims to: - Rename `sso_` site settings. DiscourseConnect specific ones are prefixed `discourse_connect_`. Generic settings are prefixed `auth_` - Add (server-side-only) backwards compatibility for the old setting names, with deprecation notices - Copy `site_settings` database records to the new names - Rename relevant translation keys - Update relevant translations This commit does **not** aim to: - Rename any Ruby classes or methods. This might be done in a future commit - Change any URLs. This would break existing integrations - Make any changes to the protocol. This would break existing integrations - Change any functionality. Further normalization across DiscourseConnect and other auth methods will be done separately The risks are: - There is no backwards compatibility for site settings on the client-side. Accessing auth-related site settings in Javascript is fairly rare, and an error on the client side would not be security-critical. - If a plugin is monkey-patching parts of the auth process, changes to locale keys could cause broken error messages. This should also be unlikely. The old site setting names remain functional, so security-related overrides will remain working. A follow-up commit will be made with a post-deploy migration to delete the old `site_settings` rows.
2021-02-08 18:04:33 +08:00
it "should not redirect to authenticator when auth_immediately is disabled" do
SiteSetting.auth_immediately = false
SiteSetting.enable_google_oauth2_logins = true
SiteSetting.enable_local_logins = false
get "/"
expect(response).to redirect_to("/login")
end
context "with omniauth in test mode" do
before do
OmniAuth.config.test_mode = true
OmniAuth.config.add_mock(
:google_oauth2,
info: OmniAuth::AuthHash::InfoHash.new(email: "address@example.com"),
extra: {
raw_info: OmniAuth::AuthHash.new(email_verified: true, email: "address@example.com"),
},
)
Rails.application.env_config["omniauth.auth"] = OmniAuth.config.mock_auth[:google_oauth2]
end
after do
Rails.application.env_config["omniauth.auth"] = OmniAuth.config.mock_auth[
:google_oauth2
] = nil
OmniAuth.config.test_mode = false
end
it "should not redirect to authenticator if registration in progress" do
SiteSetting.enable_local_logins = false
SiteSetting.enable_google_oauth2_logins = true
get "/"
expect(response).to redirect_to("/auth/google_oauth2")
expect(cookies[:authentication_data]).to eq(nil)
get "/auth/google_oauth2/callback.json"
expect(response).to redirect_to("/")
expect(cookies[:authentication_data]).not_to eq(nil)
get "/"
expect(response).to redirect_to("/login")
end
end
it "contains authentication data when cookies exist" do
cookie_data = "someauthenticationdata"
cookies["authentication_data"] = cookie_data
get "/login"
expect(response.status).to eq(200)
expect(response.body).to include("data-authentication-data=\"#{cookie_data}\"")
expect(response.headers["Set-Cookie"]).to include("authentication_data=;") # Delete cookie
end
it "deletes authentication data cookie even if already authenticated" do
sign_in(Fabricate(:user))
cookies["authentication_data"] = "someauthenticationdata"
get "/"
expect(response.status).to eq(200)
expect(response.body).not_to include("data-authentication-data=")
expect(response.headers["Set-Cookie"]).to include("authentication_data=;") # Delete cookie
end
it "returns a 403 for json requests" do
get "/latest"
expect(response.status).to eq(302)
get "/latest.json"
expect(response.status).to eq(403)
end
end
describe "#redirect_to_second_factor_if_required" do
let(:admin) { Fabricate(:admin) }
fab!(:user) { Fabricate(:user, refresh_auto_groups: true) }
before do
admin # to skip welcome wizard at home page `/`
end
it "should redirect admins when enforce_second_factor is 'all'" do
SiteSetting.enforce_second_factor = "all"
sign_in(admin)
get "/"
expect(response).to redirect_to("/u/#{admin.username}/preferences/second-factor")
end
it "should redirect users when enforce_second_factor is 'all'" do
SiteSetting.enforce_second_factor = "all"
sign_in(user)
get "/"
expect(response).to redirect_to("/u/#{user.username}/preferences/second-factor")
end
it "should redirect users when enforce_second_factor is 'all' and authenticated via oauth" do
SiteSetting.enforce_second_factor = "all"
sign_in(user)
user.user_auth_tokens.last.update(authenticated_with_oauth: true)
get "/"
expect(response).to redirect_to("/u/#{user.username}/preferences/second-factor")
end
it "should not redirect users when enforce_second_factor is 'all', authenticated via oauth but enforce_second_factor_on_external_auth is false" do
SiteSetting.enforce_second_factor = "all"
SiteSetting.enforce_second_factor_on_external_auth = false
sign_in(user)
user.user_auth_tokens.last.update(authenticated_with_oauth: true)
get "/"
expect(response.status).to eq(200)
end
it "should not redirect anonymous users when enforce_second_factor is 'all'" do
SiteSetting.enforce_second_factor = "all"
SiteSetting.allow_anonymous_posting = true
sign_in(user)
post "/u/toggle-anon.json"
expect(response.status).to eq(200)
get "/"
expect(response.status).to eq(200)
end
it "should redirect admins when enforce_second_factor is 'staff'" do
SiteSetting.enforce_second_factor = "staff"
sign_in(admin)
get "/"
expect(response).to redirect_to("/u/#{admin.username}/preferences/second-factor")
end
it "should not redirect users when enforce_second_factor is 'staff'" do
SiteSetting.enforce_second_factor = "staff"
sign_in(user)
get "/"
expect(response.status).to eq(200)
end
it "should not redirect admins when turned off" do
SiteSetting.enforce_second_factor = "no"
sign_in(admin)
get "/"
expect(response.status).to eq(200)
end
it "should not redirect users when turned off" do
SiteSetting.enforce_second_factor = "no"
sign_in(user)
get "/"
expect(response.status).to eq(200)
end
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it "correctly redirects for Unicode usernames" do
SiteSetting.enforce_second_factor = "all"
SiteSetting.unicode_usernames = true
user = sign_in(Fabricate(:unicode_user))
get "/"
expect(response).to redirect_to("/u/#{user.encoded_username}/preferences/second-factor")
end
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context "when enforcing second factor for staff" do
before do
SiteSetting.enforce_second_factor = "staff"
sign_in(admin)
end
context "when the staff member has not enabled TOTP or security keys" do
it "redirects the staff to the second factor preferences" do
get "/"
expect(response).to redirect_to("/u/#{admin.username}/preferences/second-factor")
end
end
context "when the staff member has enabled TOTP" do
before { Fabricate(:user_second_factor_totp, user: admin) }
it "does not redirects the staff to set up 2FA" do
get "/"
expect(response.status).to eq(200)
end
end
context "when the staff member has enabled security keys" do
before { Fabricate(:user_security_key_with_random_credential, user: admin) }
it "does not redirects the staff to set up 2FA" do
get "/"
expect(response.status).to eq(200)
end
end
end
end
describe "#redirect_to_profile_if_required" do
fab!(:user)
before { sign_in(user) }
context "when the user is missing required custom fields" do
before do
Fabricate(:user_field, requirement: "for_all_users")
UserRequiredFieldsVersion.create!
end
it "redirects the user to the profile preferences" do
get "/hot"
expect(response).to redirect_to("/u/#{user.username}/preferences/profile")
end
it "only logs user history once per day" do
expect do
RateLimiter.enable
get "/hot"
get "/hot"
end.to change { UserHistory.count }.by(1)
end
end
context "when the user has filled up all required custom fields" do
before do
Fabricate(:user_field, requirement: "for_all_users")
UserRequiredFieldsVersion.create!
user.bump_required_fields_version
end
it "redirects the user to the profile preferences" do
get "/hot"
expect(response).not_to redirect_to("/u/#{user.username}/preferences/profile")
end
end
end
describe "invalid request params" do
before do
@old_logger = Rails.logger
@logs = StringIO.new
Rails.logger = Logger.new(@logs)
end
after { Rails.logger = @old_logger }
it "should not raise a 500 (nor should it log a warning) for bad params" do
bad_str = (+"d\xDE").force_encoding("utf-8")
expect(bad_str.valid_encoding?).to eq(false)
get "/latest.json", params: { test: bad_str }
expect(response.status).to eq(400)
log = @logs.string
if (log.include? "exception app middleware")
# heisentest diagnostics
puts
puts "EXTRA DIAGNOSTICS FOR INTERMITTENT TEST FAIL"
puts log
puts ">> action_dispatch.exception"
ex = request.env["action_dispatch.exception"]
puts ">> exception class: #{ex.class} : #{ex}"
end
expect(log).not_to include("exception app middleware")
expect(response.status).to eq(400)
end
end
describe "missing required param" do
it "should return a 400" do
get "/search/query.json", params: { trem: "misspelled term" }
expect(response.status).to eq(400)
expect(response.parsed_body["errors"].first).to include(
"param is missing or the value is empty: term",
)
end
end
describe "build_not_found_page" do
describe "topic not found" do
it "should not redirect to permalink if topic/category does not exist" do
topic = create_post.topic
Permalink.create!(url: topic.relative_url, topic_id: topic.id + 1)
topic.trash!
SiteSetting.detailed_404 = false
get topic.relative_url
expect(response.status).to eq(404)
SiteSetting.detailed_404 = true
get topic.relative_url
expect(response.status).to eq(410)
end
it "should return permalink for deleted topics" do
topic = create_post.topic
external_url = "https://somewhere.over.rainbow"
Permalink.create!(url: topic.relative_url, external_url: external_url)
topic.trash!
get topic.relative_url
expect(response.status).to eq(301)
expect(response).to redirect_to(external_url)
get "/t/#{topic.id}.json"
expect(response.status).to eq(301)
expect(response).to redirect_to(external_url)
get "/t/#{topic.id}.json", xhr: true
expect(response.status).to eq(200)
expect(response.body).to eq(external_url)
end
it "supports subfolder with permalinks" do
set_subfolder "/forum"
trashed_topic = create_post.topic
trashed_topic.trash!
new_topic = create_post.topic
permalink = Permalink.create!(url: trashed_topic.relative_url, topic_id: new_topic.id)
# no subfolder because router doesn't know about subfolder in this test
get "/t/#{trashed_topic.slug}/#{trashed_topic.id}"
expect(response.status).to eq(301)
expect(response).to redirect_to("/forum/t/#{new_topic.slug}/#{new_topic.id}")
permalink.destroy
category = Fabricate(:category)
permalink = Permalink.create!(url: trashed_topic.relative_url, category_id: category.id)
get "/t/#{trashed_topic.slug}/#{trashed_topic.id}"
expect(response.status).to eq(301)
expect(response).to redirect_to("/forum/c/#{category.slug}/#{category.id}")
permalink.destroy
permalink =
Permalink.create!(url: trashed_topic.relative_url, post_id: new_topic.posts.last.id)
get "/t/#{trashed_topic.slug}/#{trashed_topic.id}"
expect(response.status).to eq(301)
expect(response).to redirect_to(
"/forum/t/#{new_topic.slug}/#{new_topic.id}/#{new_topic.posts.last.post_number}",
)
end
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it "should return 404 and show Google search for an invalid topic route" do
get "/t/nope-nope/99999999"
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expect(response.status).to eq(404)
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response_body = response.body
expect(response_body).to include(I18n.t("page_not_found.search_button"))
expect(response_body).to have_tag("input", with: { value: "nope nope" })
end
it "should not include Google search if login_required is enabled" do
SiteSetting.login_required = true
sign_in(Fabricate(:user))
get "/t/nope-nope/99999999"
expect(response.status).to eq(404)
expect(response.body).to_not include("google.com/search")
end
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describe "no logspam" do
before do
@orig_logger = Rails.logger
Rails.logger = @fake_logger = FakeLogger.new
end
after { Rails.logger = @orig_logger }
it "should handle 404 to a css file" do
Discourse.cache.delete("page_not_found_topics:#{I18n.locale}")
topic1 = Fabricate(:topic)
get "/stylesheets/mobile_1_4cd559272273fe6d3c7db620c617d596a5fdf240.css",
headers: {
"HTTP_ACCEPT" => "text/css,*/*,q=0.1",
}
expect(response.status).to eq(404)
expect(response.body).to include(topic1.title)
topic2 = Fabricate(:topic)
get "/stylesheets/mobile_1_4cd559272273fe6d3c7db620c617d596a5fdf240.css",
headers: {
"HTTP_ACCEPT" => "text/css,*/*,q=0.1",
}
expect(response.status).to eq(404)
expect(response.body).to include(topic1.title)
expect(response.body).to_not include(topic2.title)
expect(@fake_logger.fatals.length).to eq(0)
expect(@fake_logger.errors.length).to eq(0)
expect(@fake_logger.warnings.length).to eq(0)
end
end
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it "should cache results" do
Discourse.cache.delete("page_not_found_topics:#{I18n.locale}")
Discourse.cache.delete("page_not_found_topics:fr")
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topic1 = Fabricate(:topic)
get "/t/nope-nope/99999999"
expect(response.status).to eq(404)
expect(response.body).to include(topic1.title)
topic2 = Fabricate(:topic)
get "/t/nope-nope/99999999"
expect(response.status).to eq(404)
expect(response.body).to include(topic1.title)
expect(response.body).to_not include(topic2.title)
# Different locale should have different cache
SiteSetting.default_locale = :fr
get "/t/nope-nope/99999999"
expect(response.status).to eq(404)
expect(response.body).to include(topic1.title)
expect(response.body).to include(topic2.title)
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end
end
end
describe "#handle_theme" do
let!(:theme) { Fabricate(:theme, user_selectable: true) }
let!(:theme2) { Fabricate(:theme, user_selectable: true) }
let!(:non_selectable_theme) { Fabricate(:theme, user_selectable: false) }
fab!(:user)
fab!(:admin)
before { sign_in(user) }
it "selects the theme the user has selected" do
user.user_option.update_columns(theme_ids: [theme.id])
get "/"
expect(response.status).to eq(200)
expect(controller.theme_id).to eq(theme.id)
theme.update_attribute(:user_selectable, false)
get "/"
expect(response.status).to eq(200)
expect(controller.theme_id).to eq(SiteSetting.default_theme_id)
end
it "can be overridden with a cookie" do
user.user_option.update_columns(theme_ids: [theme.id])
cookies["theme_ids"] = "#{theme2.id}|#{user.user_option.theme_key_seq}"
get "/"
expect(response.status).to eq(200)
expect(controller.theme_id).to eq(theme2.id)
end
it "falls back to the default theme when the user has no cookies or preferences" do
user.user_option.update_columns(theme_ids: [])
cookies["theme_ids"] = nil
theme2.set_default!
get "/"
expect(response.status).to eq(200)
expect(controller.theme_id).to eq(theme2.id)
end
it "can be overridden with preview_theme_id param" do
sign_in(admin)
cookies["theme_ids"] = "#{theme.id}|#{admin.user_option.theme_key_seq}"
get "/", params: { preview_theme_id: theme2.id }
expect(response.status).to eq(200)
expect(controller.theme_id).to eq(theme2.id)
get "/", params: { preview_theme_id: non_selectable_theme.id }
expect(controller.theme_id).to eq(non_selectable_theme.id)
end
it "does not allow non privileged user to preview themes" do
sign_in(user)
get "/", params: { preview_theme_id: non_selectable_theme.id }
expect(controller.theme_id).to eq(SiteSetting.default_theme_id)
end
it "cookie can fail back to user if out of sync" do
user.user_option.update_columns(theme_ids: [theme.id])
cookies["theme_ids"] = "#{theme2.id}|#{user.user_option.theme_key_seq - 1}"
get "/"
expect(response.status).to eq(200)
expect(controller.theme_id).to eq(theme.id)
end
end
describe "Custom hostname" do
it "does not allow arbitrary host injection" do
get("/latest", headers: { "X-Forwarded-Host" => "test123.com" })
expect(response.body).not_to include("test123")
end
end
describe "allow_embedding_site_in_an_iframe" do
it "should have the 'X-Frame-Options' header with value 'sameorigin'" do
get("/latest")
expect(response.headers["X-Frame-Options"]).to eq("SAMEORIGIN")
end
it "should not include the 'X-Frame-Options' header" do
SiteSetting.allow_embedding_site_in_an_iframe = true
get("/latest")
expect(response.headers).not_to include("X-Frame-Options")
end
end
describe "setting `Cross-Origin-Opener-Policy` header" do
describe "when `cross_origin_opener_policy_header` site setting is set to `same-origin`" do
before { SiteSetting.cross_origin_opener_policy_header = "same-origin" }
it "sets `Cross-Origin-Opener-Policy` header to `same-origin`" do
get "/latest"
expect(response.status).to eq(200)
expect(response.headers["Cross-Origin-Opener-Policy"]).to eq("same-origin")
end
it "does not set the `Cross-Origin-Opener-Policy` header for a JSON request" do
get "/latest.json"
expect(response.status).to eq(200)
expect(response.headers["Cross-Origin-Opener-Policy"]).to eq(nil)
end
end
describe "when `cross_origin_opener_policy_header` site setting is set to `unsafe-none`" do
it "does not set the `Cross-Origin-Opener-Policy` header" do
SiteSetting.cross_origin_opener_policy_header = "unsafe-none"
get "/latest"
expect(response.status).to eq(200)
expect(response.headers["Cross-Origin-Opener-Policy"]).to eq("unsafe-none")
end
end
describe "when `cross_origin_opener_unsafe_none_groups` site setting has been set" do
fab!(:group)
fab!(:current_user) { Fabricate(:user) }
before do
SiteSetting.cross_origin_opener_policy_header = "same-origin"
SiteSetting.cross_origin_opener_unsafe_none_groups = group.id
end
context "for logged in user" do
before { sign_in(current_user) }
it "sets `Cross-Origin-Opener-Policy` to `unsafe-none` for a listed group" do
group.add(current_user)
get "/latest"
expect(response.status).to eq(200)
expect(response.headers["Cross-Origin-Opener-Policy"]).to eq("unsafe-none")
end
it "sets `Cross-Origin-Opener-Policy` to configured value when group is missing" do
get "/latest"
expect(response.status).to eq(200)
expect(response.headers["Cross-Origin-Opener-Policy"]).to eq("same-origin")
end
end
context "for anon" do
it "sets `Cross-Origin-Opener-Policy` to configured value" do
get "/latest"
expect(response.status).to eq(200)
expect(response.headers["Cross-Origin-Opener-Policy"]).to eq("same-origin")
end
end
end
end
describe "splash_screen" do
let(:admin) { Fabricate(:admin) }
before { admin }
it "adds a preloader splash screen when enabled" do
get "/"
expect(response.status).to eq(200)
expect(response.body).to include("d-splash")
SiteSetting.splash_screen = false
get "/"
expect(response.status).to eq(200)
expect(response.body).not_to include("d-splash")
end
end
describe "Delegated auth" do
let :public_key do
<<~TXT
-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDh7BS7Ey8hfbNhlNAW/47pqT7w
IhBz3UyBYzin8JurEQ2pY9jWWlY8CH147KyIZf1fpcsi7ZNxGHeDhVsbtUKZxnFV
p16Op3CHLJnnJKKBMNdXMy0yDfCAHZtqxeBOTcCo1Vt/bHpIgiK5kmaekyXIaD0n
w0z/BYpOgZ8QwnI5ZwIDAQAB
-----END PUBLIC KEY-----
TXT
end
let :args do
{ auth_redirect: "http://no-good.com", user_api_public_key: "not-a-valid-public-key" }
end
it "disallows invalid public_key param" do
args[:auth_redirect] = "discourse://auth_redirect"
get "/latest", params: args
expect(response.body).to eq(I18n.t("user_api_key.invalid_public_key"))
end
it "does not allow invalid auth_redirect" do
args[:user_api_public_key] = public_key
get "/latest", params: args
expect(response.body).to eq(I18n.t("user_api_key.invalid_auth_redirect"))
end
it "does not redirect if one_time_password scope is disallowed" do
SiteSetting.allow_user_api_key_scopes = "read|write"
args[:user_api_public_key] = public_key
args[:auth_redirect] = "discourse://auth_redirect"
get "/latest", params: args
expect(response.status).to_not eq(302)
expect(response).to_not redirect_to("#{args[:auth_redirect]}?otp=true")
end
it "redirects correctly with valid params" do
SiteSetting.login_required = true
args[:user_api_public_key] = public_key
args[:auth_redirect] = "discourse://auth_redirect"
get "/categories", params: args
expect(response.status).to eq(302)
expect(response).to redirect_to("#{args[:auth_redirect]}?otp=true")
end
end
describe "Content Security Policy" do
it "is enabled by SiteSettings" do
SiteSetting.content_security_policy = false
SiteSetting.content_security_policy_report_only = false
get "/"
expect(response.headers).to_not include("Content-Security-Policy")
expect(response.headers).to_not include("Content-Security-Policy-Report-Only")
SiteSetting.content_security_policy = true
SiteSetting.content_security_policy_report_only = true
get "/"
expect(response.headers).to include("Content-Security-Policy")
expect(response.headers).to include("Content-Security-Policy-Report-Only")
end
it "can be customized with SiteSetting" do
SiteSetting.content_security_policy = true
get "/"
script_src = parse(response.headers["Content-Security-Policy"])["script-src"]
expect(script_src).to_not include("'unsafe-eval'")
SiteSetting.content_security_policy_script_src = "'unsafe-eval'"
get "/"
script_src = parse(response.headers["Content-Security-Policy"])["script-src"]
expect(script_src).to include("'unsafe-eval'")
end
it "does not set CSP when responding to non-HTML" do
SiteSetting.content_security_policy = true
SiteSetting.content_security_policy_report_only = true
get "/latest.json"
expect(response.headers).to_not include("Content-Security-Policy")
expect(response.headers).to_not include("Content-Security-Policy-Report-Only")
end
it "when GTM is enabled it adds the same nonce to the policy and the GTM tag" do
SiteSetting.content_security_policy = true
SiteSetting.content_security_policy_report_only = true
SiteSetting.gtm_container_id = "GTM-ABCDEF"
get "/latest"
script_src = parse(response.headers["Content-Security-Policy"])["script-src"]
report_only_script_src =
parse(response.headers["Content-Security-Policy-Report-Only"])["script-src"]
nonce = extract_nonce_from_script_src(script_src)
report_only_nonce = extract_nonce_from_script_src(report_only_script_src)
expect(nonce).to eq(report_only_nonce)
gtm_meta_tag = Nokogiri::HTML5.fragment(response.body).css("#data-google-tag-manager").first
expect(gtm_meta_tag["data-nonce"]).to eq(nonce)
end
it "doesn't reuse nonces between requests" do
global_setting :anon_cache_store_threshold, 1
Middleware::AnonymousCache.enable_anon_cache
Middleware::AnonymousCache.clear_all_cache!
SiteSetting.content_security_policy = true
SiteSetting.content_security_policy_report_only = true
SiteSetting.gtm_container_id = "GTM-ABCDEF"
get "/latest"
expect(response.headers["X-Discourse-Cached"]).to eq("store")
expect(response.headers).not_to include("Discourse-CSP-Nonce-Placeholder")
script_src = parse(response.headers["Content-Security-Policy"])["script-src"]
report_only_script_src =
parse(response.headers["Content-Security-Policy-Report-Only"])["script-src"]
first_nonce = extract_nonce_from_script_src(script_src)
first_report_only_nonce = extract_nonce_from_script_src(report_only_script_src)
expect(first_nonce).to eq(first_report_only_nonce)
gtm_meta_tag = Nokogiri::HTML5.fragment(response.body).css("#data-google-tag-manager").first
expect(gtm_meta_tag["data-nonce"]).to eq(first_nonce)
get "/latest"
expect(response.headers["X-Discourse-Cached"]).to eq("true")
expect(response.headers).not_to include("Discourse-CSP-Nonce-Placeholder")
script_src = parse(response.headers["Content-Security-Policy"])["script-src"]
report_only_script_src =
parse(response.headers["Content-Security-Policy-Report-Only"])["script-src"]
second_nonce = extract_nonce_from_script_src(script_src)
second_report_only_nonce = extract_nonce_from_script_src(report_only_script_src)
expect(second_nonce).to eq(second_report_only_nonce)
expect(first_nonce).not_to eq(second_nonce)
gtm_meta_tag = Nokogiri::HTML5.fragment(response.body).css("#data-google-tag-manager").first
expect(gtm_meta_tag["data-nonce"]).to eq(second_nonce)
end
def parse(csp_string)
csp_string
.split(";")
.map do |policy|
directive, *sources = policy.split
[directive, sources]
end
.to_h
end
def extract_nonce_from_script_src(script_src)
nonce = script_src.lazy.map { |src| src[/\A'nonce-([^']+)'\z/, 1] }.find(&:itself)
expect(nonce).to be_present
nonce
end
end
it "can respond to a request with */* accept header" do
get "/", headers: { HTTP_ACCEPT: "*/*" }
expect(response.status).to eq(200)
expect(response.body).to include("Discourse")
end
it "has canonical tag" do
get "/", headers: { HTTP_ACCEPT: "*/*" }
expect(response.body).to have_tag(
"link",
with: {
rel: "canonical",
href: "http://test.localhost/",
},
)
get "/?query_param=true", headers: { HTTP_ACCEPT: "*/*" }
expect(response.body).to have_tag(
"link",
with: {
rel: "canonical",
href: "http://test.localhost/",
},
)
get "/latest?page=2&additional_param=true", headers: { HTTP_ACCEPT: "*/*" }
expect(response.body).to have_tag(
"link",
with: {
rel: "canonical",
href: "http://test.localhost/latest?page=2",
},
)
get "/404", headers: { HTTP_ACCEPT: "*/*" }
expect(response.body).to have_tag(
"link",
with: {
rel: "canonical",
href: "http://test.localhost/404",
},
)
topic = create_post.topic
get "/t/#{topic.slug}/#{topic.id}"
expect(response.body).to have_tag(
"link",
with: {
rel: "canonical",
href: "http://test.localhost/t/#{topic.slug}/#{topic.id}",
},
)
end
it "adds a noindex header if non-canonical indexing is disabled" do
SiteSetting.allow_indexing_non_canonical_urls = false
get "/"
expect(response.headers["X-Robots-Tag"]).to be_nil
get "/latest"
expect(response.headers["X-Robots-Tag"]).to be_nil
get "/categories"
expect(response.headers["X-Robots-Tag"]).to be_nil
topic = create_post.topic
get "/t/#{topic.slug}/#{topic.id}"
expect(response.headers["X-Robots-Tag"]).to be_nil
post = create_post(topic_id: topic.id)
get "/t/#{topic.slug}/#{topic.id}/2"
expect(response.headers["X-Robots-Tag"]).to eq("noindex")
20.times { create_post(topic_id: topic.id) }
get "/t/#{topic.slug}/#{topic.id}/21"
expect(response.headers["X-Robots-Tag"]).to eq("noindex")
get "/t/#{topic.slug}/#{topic.id}?page=2"
expect(response.headers["X-Robots-Tag"]).to be_nil
end
context "with default locale" do
before do
SiteSetting.default_locale = :fr
sign_in(Fabricate(:user))
end
after { I18n.reload! }
context "with rate limits" do
before { RateLimiter.enable }
use_redis_snapshotting
2020-09-30 23:04:19 +08:00
it "serves a LimitExceeded error in the preferred locale" do
SiteSetting.max_likes_per_day = 1
post1 = Fabricate(:post)
post2 = Fabricate(:post)
override =
TranslationOverride.create(
locale: "fr",
translation_key: "rate_limiter.by_type.create_like",
value: "French LimitExceeded error message",
)
I18n.reload!
post "/post_actions.json",
params: {
id: post1.id,
post_action_type_id: PostActionType.types[:like],
}
expect(response.status).to eq(200)
post "/post_actions.json",
params: {
id: post2.id,
post_action_type_id: PostActionType.types[:like],
}
expect(response.status).to eq(429)
expect(response.parsed_body["errors"].first).to eq(override.value)
end
end
it "serves an InvalidParameters error with the default locale" do
override =
TranslationOverride.create(
locale: "fr",
translation_key: "invalid_params",
value: "French InvalidParameters error message",
)
I18n.reload!
get "/search.json", params: { q: "hello\0hello" }
expect(response.status).to eq(400)
expect(response.parsed_body["errors"].first).to eq(override.value)
end
end
describe "set_locale" do
# Using /bootstrap.json because it returns a locale-dependent value
def headers(locale)
{ HTTP_ACCEPT_LANGUAGE: locale }
end
def locale_scripts(body)
Nokogiri::HTML5
.parse(body)
.css('script[src*="assets/locales/"]')
.map { |script| script.attributes["src"].value }
end
context "with allow_user_locale disabled" do
context "when accept-language header differs from default locale" do
before do
SiteSetting.allow_user_locale = false
SiteSetting.default_locale = "en"
end
context "with an anonymous user" do
it "uses the default locale" do
get "/latest", headers: headers("fr")
expect(response.status).to eq(200)
expect(locale_scripts(response.body)).to contain_exactly("/assets/locales/en.js")
end
end
context "with a logged in user" do
it "it uses the default locale" do
user = Fabricate(:user, locale: :fr)
sign_in(user)
get "/latest", headers: headers("fr")
expect(response.status).to eq(200)
expect(locale_scripts(response.body)).to contain_exactly("/assets/locales/en.js")
end
end
end
end
context "with set_locale_from_accept_language_header enabled" do
context "when accept-language header differs from default locale" do
before do
SiteSetting.allow_user_locale = true
SiteSetting.set_locale_from_accept_language_header = true
SiteSetting.default_locale = "en"
end
context "with an anonymous user" do
it "uses the locale from the headers" do
get "/latest", headers: headers("fr")
expect(response.status).to eq(200)
expect(locale_scripts(response.body)).to contain_exactly("/assets/locales/fr.js")
end
it "doesn't leak after requests" do
get "/latest", headers: headers("fr")
expect(response.status).to eq(200)
expect(locale_scripts(response.body)).to contain_exactly("/assets/locales/fr.js")
expect(I18n.locale.to_s).to eq(SiteSettings::DefaultsProvider::DEFAULT_LOCALE)
end
end
context "with a logged in user" do
let(:user) { Fabricate(:user, locale: :fr) }
before { sign_in(user) }
it "uses the user's preferred locale" do
get "/latest", headers: headers("fr")
expect(response.status).to eq(200)
expect(locale_scripts(response.body)).to contain_exactly("/assets/locales/fr.js")
end
it "serves a 404 page in the preferred locale" do
get "/missingroute", headers: headers("fr")
expect(response.status).to eq(404)
expected_title = I18n.t("page_not_found.title", locale: :fr)
expect(response.body).to include(CGI.escapeHTML(expected_title))
end
it "serves a RenderEmpty page in the preferred locale" do
get "/u/#{user.username}/preferences/interface"
expect(response.status).to eq(200)
expect(response.body).to have_tag("script", with: { src: "/assets/locales/fr.js" })
end
end
end
context "when the preferred locale includes a region" do
it "returns the locale and region separated by an underscore" do
SiteSetting.allow_user_locale = true
SiteSetting.set_locale_from_accept_language_header = true
SiteSetting.default_locale = "en"
get "/latest", headers: headers("zh-CN")
expect(response.status).to eq(200)
expect(locale_scripts(response.body)).to contain_exactly("/assets/locales/zh_CN.js")
end
end
context "when accept-language header is not set" do
it "uses the site default locale" do
SiteSetting.allow_user_locale = true
SiteSetting.default_locale = "en"
get "/latest", headers: headers("")
expect(response.status).to eq(200)
expect(locale_scripts(response.body)).to contain_exactly("/assets/locales/en.js")
end
end
end
context "with set_locale_from_cookie enabled" do
context "when cookie locale differs from default locale" do
before do
SiteSetting.allow_user_locale = true
SiteSetting.set_locale_from_cookie = true
SiteSetting.default_locale = "en"
end
context "with an anonymous user" do
it "uses the locale from the cookie" do
get "/latest", headers: { Cookie: "locale=es" }
expect(response.status).to eq(200)
expect(locale_scripts(response.body)).to contain_exactly("/assets/locales/es.js")
expect(I18n.locale.to_s).to eq(SiteSettings::DefaultsProvider::DEFAULT_LOCALE) # doesn't leak after requests
end
end
context "when the preferred locale includes a region" do
it "returns the locale and region separated by an underscore" do
get "/latest", headers: { Cookie: "locale=zh-CN" }
expect(response.status).to eq(200)
expect(locale_scripts(response.body)).to contain_exactly("/assets/locales/zh_CN.js")
end
end
end
context "when locale cookie is not set" do
it "uses the site default locale" do
SiteSetting.allow_user_locale = true
SiteSetting.default_locale = "en"
get "/latest", headers: { Cookie: "" }
expect(response.status).to eq(200)
expect(locale_scripts(response.body)).to contain_exactly("/assets/locales/en.js")
end
end
end
end
describe "vary header" do
it "includes Vary:Accept on all requests where format is not explicit" do
# Rails default behaviour - include Vary:Accept when Accept is supplied
get "/latest", headers: { "Accept" => "application/json" }
expect(response.status).to eq(200)
expect(response.headers["Vary"]).to eq("Accept")
# Discourse additional behaviour (see lib/vary_header.rb)
# Include Vary:Accept even when Accept is not supplied
get "/latest"
expect(response.status).to eq(200)
expect(response.headers["Vary"]).to eq("Accept")
# Not needed, because the path 'format' parameter overrides the Accept header
get "/latest.json"
expect(response.status).to eq(200)
expect(response.headers["Vary"]).to eq(nil)
end
end
FEATURE: Apply rate limits per user instead of IP for trusted users (#14706) Currently, Discourse rate limits all incoming requests by the IP address they originate from regardless of the user making the request. This can be frustrating if there are multiple users using Discourse simultaneously while sharing the same IP address (e.g. employees in an office). This commit implements a new feature to make Discourse apply rate limits by user id rather than IP address for users at or higher than the configured trust level (1 is the default). For example, let's say a Discourse instance is configured to allow 200 requests per minute per IP address, and we have 10 users at trust level 4 using Discourse simultaneously from the same IP address. Before this feature, the 10 users could only make a total of 200 requests per minute before they got rate limited. But with the new feature, each user is allowed to make 200 requests per minute because the rate limits are applied on user id rather than the IP address. The minimum trust level for applying user-id-based rate limits can be configured by the `skip_per_ip_rate_limit_trust_level` global setting. The default is 1, but it can be changed by either adding the `DISCOURSE_SKIP_PER_IP_RATE_LIMIT_TRUST_LEVEL` environment variable with the desired value to your `app.yml`, or changing the setting's value in the `discourse.conf` file. Requests made with API keys are still rate limited by IP address and the relevant global settings that control API keys rate limits. Before this commit, Discourse's auth cookie (`_t`) was simply a 32 characters string that Discourse used to lookup the current user from the database and the cookie contained no additional information about the user. However, we had to change the cookie content in this commit so we could identify the user from the cookie without making a database query before the rate limits logic and avoid introducing a bottleneck on busy sites. Besides the 32 characters auth token, the cookie now includes the user id, trust level and the cookie's generation date, and we encrypt/sign the cookie to prevent tampering. Internal ticket number: t54739.
2021-11-18 04:27:30 +08:00
describe "Discourse-Rate-Limit-Error-Code header" do
fab!(:admin)
FEATURE: Apply rate limits per user instead of IP for trusted users (#14706) Currently, Discourse rate limits all incoming requests by the IP address they originate from regardless of the user making the request. This can be frustrating if there are multiple users using Discourse simultaneously while sharing the same IP address (e.g. employees in an office). This commit implements a new feature to make Discourse apply rate limits by user id rather than IP address for users at or higher than the configured trust level (1 is the default). For example, let's say a Discourse instance is configured to allow 200 requests per minute per IP address, and we have 10 users at trust level 4 using Discourse simultaneously from the same IP address. Before this feature, the 10 users could only make a total of 200 requests per minute before they got rate limited. But with the new feature, each user is allowed to make 200 requests per minute because the rate limits are applied on user id rather than the IP address. The minimum trust level for applying user-id-based rate limits can be configured by the `skip_per_ip_rate_limit_trust_level` global setting. The default is 1, but it can be changed by either adding the `DISCOURSE_SKIP_PER_IP_RATE_LIMIT_TRUST_LEVEL` environment variable with the desired value to your `app.yml`, or changing the setting's value in the `discourse.conf` file. Requests made with API keys are still rate limited by IP address and the relevant global settings that control API keys rate limits. Before this commit, Discourse's auth cookie (`_t`) was simply a 32 characters string that Discourse used to lookup the current user from the database and the cookie contained no additional information about the user. However, we had to change the cookie content in this commit so we could identify the user from the cookie without making a database query before the rate limits logic and avoid introducing a bottleneck on busy sites. Besides the 32 characters auth token, the cookie now includes the user id, trust level and the cookie's generation date, and we encrypt/sign the cookie to prevent tampering. Internal ticket number: t54739.
2021-11-18 04:27:30 +08:00
before { RateLimiter.enable }
use_redis_snapshotting
FEATURE: Apply rate limits per user instead of IP for trusted users (#14706) Currently, Discourse rate limits all incoming requests by the IP address they originate from regardless of the user making the request. This can be frustrating if there are multiple users using Discourse simultaneously while sharing the same IP address (e.g. employees in an office). This commit implements a new feature to make Discourse apply rate limits by user id rather than IP address for users at or higher than the configured trust level (1 is the default). For example, let's say a Discourse instance is configured to allow 200 requests per minute per IP address, and we have 10 users at trust level 4 using Discourse simultaneously from the same IP address. Before this feature, the 10 users could only make a total of 200 requests per minute before they got rate limited. But with the new feature, each user is allowed to make 200 requests per minute because the rate limits are applied on user id rather than the IP address. The minimum trust level for applying user-id-based rate limits can be configured by the `skip_per_ip_rate_limit_trust_level` global setting. The default is 1, but it can be changed by either adding the `DISCOURSE_SKIP_PER_IP_RATE_LIMIT_TRUST_LEVEL` environment variable with the desired value to your `app.yml`, or changing the setting's value in the `discourse.conf` file. Requests made with API keys are still rate limited by IP address and the relevant global settings that control API keys rate limits. Before this commit, Discourse's auth cookie (`_t`) was simply a 32 characters string that Discourse used to lookup the current user from the database and the cookie contained no additional information about the user. However, we had to change the cookie content in this commit so we could identify the user from the cookie without making a database query before the rate limits logic and avoid introducing a bottleneck on busy sites. Besides the 32 characters auth token, the cookie now includes the user id, trust level and the cookie's generation date, and we encrypt/sign the cookie to prevent tampering. Internal ticket number: t54739.
2021-11-18 04:27:30 +08:00
it "is included when API key is rate limited" do
global_setting :max_admin_api_reqs_per_minute, 1
api_key = ApiKey.create!(user_id: admin.id).key
get "/latest.json", headers: { "Api-Key": api_key, "Api-Username": admin.username }
expect(response.status).to eq(200)
get "/latest.json", headers: { "Api-Key": api_key, "Api-Username": admin.username }
expect(response.status).to eq(429)
expect(response.headers["Discourse-Rate-Limit-Error-Code"]).to eq("admin_api_key_rate_limit")
end
it "is included when user API key is rate limited" do
global_setting :max_user_api_reqs_per_minute, 1
user_api_key =
UserApiKey.create!(user_id: admin.id, client_id: "", application_name: "discourseapp")
user_api_key.scopes =
UserApiKeyScope.all_scopes.keys.map do |name|
UserApiKeyScope.create!(name: name, user_api_key_id: user_api_key.id)
end
user_api_key.save!
get "/session/current.json", headers: { "User-Api-Key": user_api_key.key }
expect(response.status).to eq(200)
get "/session/current.json", headers: { "User-Api-Key": user_api_key.key }
expect(response.status).to eq(429)
expect(response.headers["Discourse-Rate-Limit-Error-Code"]).to eq(
"user_api_key_limiter_60_secs",
)
global_setting :max_user_api_reqs_per_minute, 100
global_setting :max_user_api_reqs_per_day, 1
get "/session/current.json", headers: { "User-Api-Key": user_api_key.key }
expect(response.status).to eq(429)
expect(response.headers["Discourse-Rate-Limit-Error-Code"]).to eq(
"user_api_key_limiter_1_day",
)
end
end
FEATURE: Replace `Crawl-delay` directive with proper rate limiting (#15131) We have a couple of site setting, `slow_down_crawler_user_agents` and `slow_down_crawler_rate`, that are meant to allow site owners to signal to specific crawlers that they're crawling the site too aggressively and that they should slow down. When a crawler is added to the `slow_down_crawler_user_agents` setting, Discourse currently adds a `Crawl-delay` directive for that crawler in `/robots.txt`. Unfortunately, many crawlers don't support the `Crawl-delay` directive in `/robots.txt` which leaves the site owners no options if a crawler is crawling the site too aggressively. This PR replaces the `Crawl-delay` directive with proper rate limiting for crawlers added to the `slow_down_crawler_user_agents` list. On every request made by a non-logged in user, Discourse will check the User Agent string and if it contains one of the values of the `slow_down_crawler_user_agents` list, Discourse will only allow 1 request every N seconds for that User Agent (N is the value of the `slow_down_crawler_rate` setting) and the rest of requests made within the same interval will get a 429 response. The `slow_down_crawler_user_agents` setting becomes quite dangerous with this PR since it could rate limit lots if not all of anonymous traffic if the setting is not used appropriately. So to protect against this scenario, we've added a couple of new validations to the setting when it's changed: 1) each value added to setting must 3 characters or longer 2) each value cannot be a substring of tokens found in popular browser User Agent. The current list of prohibited values is: apple, windows, linux, ubuntu, gecko, firefox, chrome, safari, applewebkit, webkit, mozilla, macintosh, khtml, intel, osx, os x, iphone, ipad and mac.
2021-11-30 17:55:25 +08:00
describe "crawlers in slow_down_crawler_user_agents site setting" do
before do
Fabricate(:admin) # to prevent redirect to the wizard
RateLimiter.enable
SiteSetting.slow_down_crawler_rate = 128
SiteSetting.slow_down_crawler_user_agents = "badcrawler|problematiccrawler"
end
use_redis_snapshotting
FEATURE: Replace `Crawl-delay` directive with proper rate limiting (#15131) We have a couple of site setting, `slow_down_crawler_user_agents` and `slow_down_crawler_rate`, that are meant to allow site owners to signal to specific crawlers that they're crawling the site too aggressively and that they should slow down. When a crawler is added to the `slow_down_crawler_user_agents` setting, Discourse currently adds a `Crawl-delay` directive for that crawler in `/robots.txt`. Unfortunately, many crawlers don't support the `Crawl-delay` directive in `/robots.txt` which leaves the site owners no options if a crawler is crawling the site too aggressively. This PR replaces the `Crawl-delay` directive with proper rate limiting for crawlers added to the `slow_down_crawler_user_agents` list. On every request made by a non-logged in user, Discourse will check the User Agent string and if it contains one of the values of the `slow_down_crawler_user_agents` list, Discourse will only allow 1 request every N seconds for that User Agent (N is the value of the `slow_down_crawler_rate` setting) and the rest of requests made within the same interval will get a 429 response. The `slow_down_crawler_user_agents` setting becomes quite dangerous with this PR since it could rate limit lots if not all of anonymous traffic if the setting is not used appropriately. So to protect against this scenario, we've added a couple of new validations to the setting when it's changed: 1) each value added to setting must 3 characters or longer 2) each value cannot be a substring of tokens found in popular browser User Agent. The current list of prohibited values is: apple, windows, linux, ubuntu, gecko, firefox, chrome, safari, applewebkit, webkit, mozilla, macintosh, khtml, intel, osx, os x, iphone, ipad and mac.
2021-11-30 17:55:25 +08:00
it "are rate limited" do
now = Time.zone.now
freeze_time now
get "/", headers: { "HTTP_USER_AGENT" => "iam badcrawler" }
expect(response.status).to eq(200)
get "/", headers: { "HTTP_USER_AGENT" => "iam badcrawler" }
expect(response.status).to eq(429)
expect(response.headers["Retry-After"]).to eq("128")
get "/", headers: { "HTTP_USER_AGENT" => "iam problematiccrawler" }
expect(response.status).to eq(200)
get "/", headers: { "HTTP_USER_AGENT" => "iam problematiccrawler" }
expect(response.status).to eq(429)
expect(response.headers["Retry-After"]).to eq("128")
freeze_time now + 100.seconds
get "/", headers: { "HTTP_USER_AGENT" => "iam badcrawler" }
expect(response.status).to eq(429)
expect(response.headers["Retry-After"]).to eq("28")
get "/", headers: { "HTTP_USER_AGENT" => "iam problematiccrawler" }
expect(response.status).to eq(429)
expect(response.headers["Retry-After"]).to eq("28")
freeze_time now + 150.seconds
get "/", headers: { "HTTP_USER_AGENT" => "iam badcrawler" }
expect(response.status).to eq(200)
get "/", headers: { "HTTP_USER_AGENT" => "iam problematiccrawler" }
expect(response.status).to eq(200)
end
context "with anonymous caching" do
before do
global_setting :anon_cache_store_threshold, 1
Middleware::AnonymousCache.enable_anon_cache
end
it "don't bypass crawler rate limits" do
get "/", headers: { "HTTP_USER_AGENT" => "iam badcrawler" }
expect(response.status).to eq(200)
get "/", headers: { "HTTP_USER_AGENT" => "iam badcrawler" }
expect(response.status).to eq(429)
end
end
FEATURE: Replace `Crawl-delay` directive with proper rate limiting (#15131) We have a couple of site setting, `slow_down_crawler_user_agents` and `slow_down_crawler_rate`, that are meant to allow site owners to signal to specific crawlers that they're crawling the site too aggressively and that they should slow down. When a crawler is added to the `slow_down_crawler_user_agents` setting, Discourse currently adds a `Crawl-delay` directive for that crawler in `/robots.txt`. Unfortunately, many crawlers don't support the `Crawl-delay` directive in `/robots.txt` which leaves the site owners no options if a crawler is crawling the site too aggressively. This PR replaces the `Crawl-delay` directive with proper rate limiting for crawlers added to the `slow_down_crawler_user_agents` list. On every request made by a non-logged in user, Discourse will check the User Agent string and if it contains one of the values of the `slow_down_crawler_user_agents` list, Discourse will only allow 1 request every N seconds for that User Agent (N is the value of the `slow_down_crawler_rate` setting) and the rest of requests made within the same interval will get a 429 response. The `slow_down_crawler_user_agents` setting becomes quite dangerous with this PR since it could rate limit lots if not all of anonymous traffic if the setting is not used appropriately. So to protect against this scenario, we've added a couple of new validations to the setting when it's changed: 1) each value added to setting must 3 characters or longer 2) each value cannot be a substring of tokens found in popular browser User Agent. The current list of prohibited values is: apple, windows, linux, ubuntu, gecko, firefox, chrome, safari, applewebkit, webkit, mozilla, macintosh, khtml, intel, osx, os x, iphone, ipad and mac.
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end
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describe "#banner_json" do
let(:admin) { Fabricate(:admin) }
let(:user) { Fabricate(:user) }
fab!(:banner_topic)
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fab!(:p1) { Fabricate(:post, topic: banner_topic, raw: "A banner topic") }
before do
admin # to skip welcome wizard at home page `/`
end
context "with login_required" do
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before { SiteSetting.login_required = true }
it "does not include banner info for anonymous users" do
get "/login"
expect(response.body).to have_tag("div#data-preloaded") do |element|
json = JSON.parse(element.current_scope.attribute("data-preloaded").value)
expect(json["banner"]).to eq("{}")
end
end
it "includes banner info for logged-in users" do
sign_in(user)
get "/"
expect(response.body).to have_tag("div#data-preloaded") do |element|
json = JSON.parse(element.current_scope.attribute("data-preloaded").value)
expect(JSON.parse(json["banner"])["html"]).to eq("<p>A banner topic</p>")
end
end
end
context "with login not required" do
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before { SiteSetting.login_required = false }
it "does include banner info for anonymous users" do
get "/login"
expect(response.body).to have_tag("div#data-preloaded") do |element|
json = JSON.parse(element.current_scope.attribute("data-preloaded").value)
expect(JSON.parse(json["banner"])["html"]).to eq("<p>A banner topic</p>")
end
end
end
end
describe "Early hint header" do
before { global_setting :cdn_url, "https://cdn.example.com/something" }
it "is not included by default" do
get "/latest"
expect(response.status).to eq(200)
expect(response.headers["Link"]).to eq(nil)
end
context "when in preconnect mode" do
before { global_setting :early_hint_header_mode, "preconnect" }
it "includes the preconnect hint" do
get "/latest"
expect(response.status).to eq(200)
expect(response.headers["Link"]).to include("<https://cdn.example.com>; rel=preconnect")
expect(response.headers["Link"]).not_to include("rel=preload")
end
it "can use a different header" do
global_setting :early_hint_header_name, "X-Discourse-Early-Hint"
get "/latest"
expect(response.status).to eq(200)
expect(response.headers["X-Discourse-Early-Hint"]).to include(
"<https://cdn.example.com>; rel=preconnect",
)
expect(response.headers["Link"]).to eq(nil)
end
it "is skipped for non-app URLs" do
get "/latest.json"
expect(response.status).to eq(200)
expect(response.headers["Link"]).to eq(nil)
end
end
context "when in preload mode" do
before { global_setting :early_hint_header_mode, "preload" }
it "includes the preload hint" do
get "/latest"
expect(response.status).to eq(200)
expect(response.headers["Link"]).to include('.js>; rel="preload"')
expect(response.headers["Link"]).to include('.css?__ws=test.localhost>; rel="preload"')
end
end
end
describe "preloading data" do
def preloaded_json
JSON.parse(
Nokogiri::HTML5.fragment(response.body).css("div#data-preloaded").first["data-preloaded"],
)
end
context "when user is anon" do
it "preloads the relevant JSON data" do
get "/latest"
expect(response.status).to eq(200)
expect(preloaded_json.keys).to match_array(
[
"site",
"siteSettings",
"customHTML",
"banner",
"customEmoji",
"isReadOnly",
"isStaffWritesOnly",
"activatedThemes",
"#{TopicList.new("latest", Fabricate(:anonymous), []).preload_key}",
],
)
end
end
context "when user is regular user" do
fab!(:user)
before { sign_in(user) }
it "preloads the relevant JSON data" do
get "/latest"
expect(response.status).to eq(200)
expect(preloaded_json.keys).to match_array(
[
"site",
"siteSettings",
"customHTML",
"banner",
"customEmoji",
"isReadOnly",
"isStaffWritesOnly",
"activatedThemes",
"#{TopicList.new("latest", Fabricate(:anonymous), []).preload_key}",
"currentUser",
"topicTrackingStates",
"topicTrackingStateMeta",
],
)
end
end
context "when user is admin" do
fab!(:user) { Fabricate(:admin) }
before { sign_in(user) }
it "preloads the relevant JSON data" do
get "/latest"
expect(response.status).to eq(200)
expect(preloaded_json.keys).to match_array(
[
"site",
"siteSettings",
"customHTML",
"banner",
"customEmoji",
"isReadOnly",
"isStaffWritesOnly",
"activatedThemes",
"#{TopicList.new("latest", Fabricate(:anonymous), []).preload_key}",
"currentUser",
"topicTrackingStates",
"topicTrackingStateMeta",
"fontMap",
"visiblePlugins",
],
)
end
it "generates a fontMap" do
get "/latest"
expect(response.status).to eq(200)
font_map = JSON.parse(preloaded_json["fontMap"])
expect(font_map.keys).to match_array(
DiscourseFonts.fonts.filter { |f| f[:variants].present? }.map { |f| f[:key] },
)
end
it "has correctly loaded visiblePlugins" do
get "/latest"
expect(JSON.parse(preloaded_json["visiblePlugins"])).to eq([])
end
end
describe "readonly serialization" do
it "serializes regular readonly mode correctly" do
Discourse.enable_readonly_mode(Discourse::USER_READONLY_MODE_KEY)
get "/latest"
expect(JSON.parse(preloaded_json["isReadOnly"])).to eq(true)
expect(JSON.parse(preloaded_json["isStaffWritesOnly"])).to eq(false)
ensure
Discourse.disable_readonly_mode(Discourse::USER_READONLY_MODE_KEY)
end
it "serializes staff readonly mode correctly" do
Discourse.enable_readonly_mode(Discourse::STAFF_WRITES_ONLY_MODE_KEY)
get "/latest"
expect(JSON.parse(preloaded_json["isReadOnly"])).to eq(true)
expect(JSON.parse(preloaded_json["isStaffWritesOnly"])).to eq(true)
ensure
Discourse.disable_readonly_mode(Discourse::STAFF_WRITES_ONLY_MODE_KEY)
end
end
end
end