X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/3bb07e29ec7c178757f3c94eea84935a554d812d..e409e83b4886ce918c64f5c4cd7fa30cbc1ba14f:/app/controllers/api_controller.rb

diff --git a/app/controllers/api_controller.rb b/app/controllers/api_controller.rb
index fb3717b2a..a8067a493 100644
--- a/app/controllers/api_controller.rb
+++ b/app/controllers/api_controller.rb
@@ -1,3 +1,146 @@
 class ApiController < ApplicationController
   skip_before_action :verify_authenticity_token
+
+  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?
+      # self.current_user setup by OAuth
+    elsif Settings.basic_auth_support
+      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)
+                          elsif username == "token"
+                            User.authenticate(:token => passwd) # preferred - random token for user from db, passed in basic auth
+                          else
+                            User.authenticate(:username => username, :password => passwd) # basic auth
+                          end
+      # log if we have authenticated using basic auth
+      logger.info "Authenticated as user #{current_user.id} using basic authentication" if current_user
+    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
 end