# Filters added to this controller will be run for all controllers in the application.
# Likewise, all the methods added will be available for all controllers.
class ApplicationController < ActionController::Base
-end
\ No newline at end of file
+
+ def authorize_web
+ if session[:user]
+ @user = User.find(session[:user])
+ elsif session[:token]
+ @user = User.authenticate(:token => session[:token])
+ session[:user] = @user.id
+ end
+ rescue Exception => ex
+ logger.info("Exception authorizing user: #{ex.to_s}")
+ @user = nil
+ end
+
+ def require_user
+ redirect_to :controller => 'user', :action => 'login', :referer => request.request_uri unless @user
+ end
+
+ def authorize(realm='Web Password', errormessage="Couldn't authenticate you")
+ username, passwd = get_auth_data # parse from headers
+ # authenticate per-scheme
+ if username.nil?
+ @user = nil # no authentication provided - perhaps first connect (client should retry after 401)
+ elsif username == 'token'
+ @user = User.authenticate(:token => passwd) # preferred - random token for user from db, passed in basic auth
+ else
+ @user = User.authenticate(:username => username, :password => passwd) # basic auth
+ end
+
+ # handle authenticate pass/fail
+ unless @user
+ # no auth, the user does not exist or the password was wrong
+ response.headers["Status"] = "Unauthorized"
+ response.headers["WWW-Authenticate"] = "Basic realm=\"#{realm}\""
+ render :text => errormessage, :status => :unauthorized
+ return false
+ end
+ end
+
+ def check_read_availability
+ if API_STATUS == :offline
+ response.headers['Error'] = "Database offline for maintenance"
+ render :nothing => true, :status => :service_unavailable
+ return false
+ end
+ end
+
+ def check_write_availability
+ if API_STATUS == :offline or API_STATUS == :readonly
+ response.headers['Error'] = "Database offline for maintenance"
+ render :nothing => true, :status => :service_unavailable
+ return false
+ end
+ end
+
+ # Report and error to the user
+ # (If anyone ever fixes Rails so it can set a http status "reason phrase",
+ # rather than only a status code and having the web engine make up a
+ # phrase from that, we can also put the error message into the status
+ # message. For now, rails won't let us)
+ def report_error(message)
+ render :text => message, :status => :bad_request
+ # Todo: some sort of escaping of problem characters in the message
+ response.headers['Error'] = message
+ end
+
+private
+
+ # extract authorisation credentials from headers, returns user = nil if none
+ def get_auth_data
+ if request.env.has_key? 'X-HTTP_AUTHORIZATION' # where mod_rewrite might have put it
+ authdata = request.env['X-HTTP_AUTHORIZATION'].to_s.split
+ elsif request.env.has_key? 'REDIRECT_X_HTTP_AUTHORIZATION' # mod_fcgi
+ authdata = request.env['REDIRECT_X_HTTP_AUTHORIZATION'].to_s.split
+ elsif request.env.has_key? 'HTTP_AUTHORIZATION' # regular location
+ authdata = request.env['HTTP_AUTHORIZATION'].to_s.split
+ end
+ # only basic authentication supported
+ if authdata and authdata[0] == 'Basic'
+ user, pass = Base64.decode64(authdata[1]).split(':',2)
+ end
+ return [user, pass]
+ end
+
+end