class ApiController < ApplicationController
skip_before_action :verify_authenticity_token
+
+ before_action :check_api_readable
+
+ private
+
+ ##
+ # Set allowed request formats if no explicit format has been
+ # requested via a URL suffix. Allowed formats are taken from
+ # any HTTP Accept header with XML as the default.
+ def set_request_formats
+ unless params[:format]
+ accept_header = request.headers["HTTP_ACCEPT"]
+
+ if accept_header
+ # Some clients (such asJOSM) send Accept headers which cannot be
+ # parse by Rails, for example:
+ #
+ # Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
+ #
+ # where both "*" and ".2" as a quality do not adhere to the syntax
+ # described in RFC 7231, section 5.3.1, etc.
+ #
+ # As a workaround, and for back compatibility, default to XML format.
+ mimetypes = begin
+ Mime::Type.parse(accept_header)
+ rescue Mime::Type::InvalidMimeType
+ Array(Mime[:xml])
+ end
+
+ # Allow XML and JSON formats, and treat an all formats wildcard
+ # as XML for backwards compatibility - all other formats are discarded
+ # which will result in a 406 Not Acceptable response being sent
+ formats = mimetypes.map do |mime|
+ if mime.symbol == :xml || mime == "*/*" then :xml
+ elsif mime.symbol == :json then :json
+ end
+ end
+ else
+ # Default to XML if no accept header was sent - this includes
+ # the unit tests which don't set one by default
+ formats = Array(:xml)
+ end
+
+ request.formats = formats.compact
+ end
+ end
+
+ def authorize(realm = "Web Password", errormessage = "Couldn't authenticate you")
+ # make the current_user object from any auth sources we have
+ setup_user_auth
+
+ # handle authenticate pass/fail
+ unless current_user
+ # no auth, the user does not exist or the password was wrong
+ if Settings.basic_auth_support
+ response.headers["WWW-Authenticate"] = "Basic realm=\"#{realm}\""
+ render :plain => errormessage, :status => :unauthorized
+ else
+ render :plain => errormessage, :status => :forbidden
+ end
+
+ false
+ end
+ end
+
+ def current_ability
+ # Use capabilities from the oauth token if it exists and is a valid access token
+ if doorkeeper_token&.accessible?
+ ApiAbility.new(nil).merge(ApiCapability.new(doorkeeper_token))
+ elsif Authenticator.new(self, [:token]).allow?
+ ApiAbility.new(nil).merge(ApiCapability.new(current_token))
+ else
+ ApiAbility.new(current_user)
+ end
+ end
+
+ def deny_access(_exception)
+ if doorkeeper_token || current_token
+ set_locale
+ report_error t("oauth.permissions.missing"), :forbidden
+ elsif current_user
+ head :forbidden
+ elsif Settings.basic_auth_support
+ realm = "Web Password"
+ errormessage = "Couldn't authenticate you"
+ response.headers["WWW-Authenticate"] = "Basic realm=\"#{realm}\""
+ render :plain => errormessage, :status => :unauthorized
+ else
+ render :plain => errormessage, :status => :forbidden
+ end
+ end
+
+ def gpx_status
+ status = database_status
+ status = "offline" if status == "online" && Settings.status == "gpx_offline"
+ status
+ end
+
+ ##
+ # sets up the current_user for use by other methods. this is mostly called
+ # from the authorize method, but can be called elsewhere if authorisation
+ # is optional.
+ def setup_user_auth
+ logger.info " setup_user_auth"
+ # try and setup using OAuth
+ if doorkeeper_token&.accessible?
+ self.current_user = User.find(doorkeeper_token.resource_owner_id)
+ elsif Authenticator.new(self, [:token]).allow?
+ if Settings.oauth_10a_support
+ # self.current_user setup by OAuth
+ else
+ report_error t("application.oauth_10a_disabled", :link => t("application.auth_disabled_link")), :forbidden
+ end
+ else
+ username, passwd = auth_data # parse from headers
+ # authenticate per-scheme
+ self.current_user = if username.nil?
+ nil # no authentication provided - perhaps first connect (client should retry after 401)
+ else
+ User.authenticate(:username => username, :password => passwd) # basic auth
+ end
+ if username && current_user
+ if Settings.basic_auth_support
+ # log if we have authenticated using basic auth
+ logger.info "Authenticated as user #{current_user.id} using basic authentication"
+ else
+ report_error t("application.basic_auth_disabled", :link => t("application.auth_disabled_link")), :forbidden
+ end
+ end
+ end
+
+ # have we identified the user?
+ if current_user
+ # check if the user has been banned
+ user_block = current_user.blocks.active.take
+ unless user_block.nil?
+ set_locale
+ if user_block.zero_hour?
+ report_error t("application.setup_user_auth.blocked_zero_hour"), :forbidden
+ else
+ report_error t("application.setup_user_auth.blocked"), :forbidden
+ end
+ end
+
+ # if the user hasn't seen the contributor terms then don't
+ # allow editing - they have to go to the web site and see
+ # (but can decline) the CTs to continue.
+ if !current_user.terms_seen && flash[:skip_terms].nil?
+ set_locale
+ report_error t("application.setup_user_auth.need_to_see_terms"), :forbidden
+ end
+ end
+ end
+
+ def api_call_handle_error
+ yield
+ rescue ActionController::UnknownFormat
+ head :not_acceptable
+ rescue ActiveRecord::RecordNotFound => e
+ head :not_found
+ rescue LibXML::XML::Error, ArgumentError => e
+ report_error e.message, :bad_request
+ rescue ActiveRecord::RecordInvalid => e
+ message = "#{e.record.class} #{e.record.id}: "
+ e.record.errors.each { |error| message << "#{error.attribute}: #{error.message} (#{e.record[error.attribute].inspect})" }
+ report_error message, :bad_request
+ rescue OSM::APIError => e
+ report_error e.message, e.status
+ rescue AbstractController::ActionNotFound => e
+ raise
+ rescue StandardError => e
+ logger.info("API threw unexpected #{e.class} exception: #{e.message}")
+ e.backtrace.each { |l| logger.info(l) }
+ report_error "#{e.class}: #{e.message}", :internal_server_error
+ end
+
+ ##
+ # wrap an api call in a timeout
+ def api_call_timeout(&block)
+ Timeout.timeout(Settings.api_timeout, &block)
+ rescue ActionView::Template::Error => e
+ e = e.cause
+
+ if e.is_a?(Timeout::Error) ||
+ (e.is_a?(ActiveRecord::StatementInvalid) && e.message.include?("execution expired"))
+ ActiveRecord::Base.connection.raw_connection.cancel
+ raise OSM::APITimeoutError
+ else
+ raise
+ end
+ rescue Timeout::Error
+ ActiveRecord::Base.connection.raw_connection.cancel
+ raise OSM::APITimeoutError
+ end
+
+ ##
+ # check the api change rate limit
+ def check_rate_limit(new_changes = 1)
+ max_changes = ActiveRecord::Base.connection.select_value(
+ "SELECT api_rate_limit($1)", "api_rate_limit", [current_user.id]
+ )
+
+ raise OSM::APIRateLimitExceeded if new_changes > max_changes
+ end
end
projects / rails.git / blobdiff