122 lines
4.5 KiB
Ruby
122 lines
4.5 KiB
Ruby
# Filters added to this controller will be run for all controllers in the application.
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# Likewise, all the methods added will be available for all controllers.
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class ApplicationController < ActionController::Base
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if OSM_STATUS == :database_readonly or OSM_STATUS == :database_offline
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session :off
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end
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def authorize_web
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if session[:user]
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@user = User.find(session[:user], :conditions => {:visible => true})
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elsif session[:token]
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@user = User.authenticate(:token => session[:token])
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session[:user] = @user.id
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end
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rescue Exception => ex
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logger.info("Exception authorizing user: #{ex.to_s}")
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@user = nil
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end
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def require_user
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redirect_to :controller => 'user', :action => 'login', :referer => request.request_uri unless @user
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end
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##
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# sets up the @user object for use by other methods. this is mostly called
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# from the authorize method, but can be called elsewhere if authorisation
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# is optional.
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def setup_user_auth
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username, passwd = get_auth_data # parse from headers
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# authenticate per-scheme
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if username.nil?
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@user = nil # no authentication provided - perhaps first connect (client should retry after 401)
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elsif username == 'token'
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@user = User.authenticate(:token => passwd) # preferred - random token for user from db, passed in basic auth
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else
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@user = User.authenticate(:username => username, :password => passwd) # basic auth
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end
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end
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def authorize(realm='Web Password', errormessage="Couldn't authenticate you")
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# make the @user object from any auth sources we have
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setup_user_auth
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# handle authenticate pass/fail
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unless @user
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# no auth, the user does not exist or the password was wrong
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response.headers["Status"] = "Unauthorized"
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response.headers["WWW-Authenticate"] = "Basic realm=\"#{realm}\""
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render :text => errormessage, :status => :unauthorized
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return false
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end
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end
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def check_database_readable(need_api = false)
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if OSM_STATUS == :database_offline or (need_api and OSM_STATUS == :api_offline)
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redirect_to :controller => 'site', :action => 'offline'
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end
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end
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def check_database_writable(need_api = false)
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if OSM_STATUS == :database_offline or OSM_STATUS == :database_readonly or
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(need_api and (OSM_STATUS == :api_offline or OSM_STATUS == :api_readonly))
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redirect_to :controller => 'site', :action => 'offline'
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end
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end
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def check_api_readable
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if OSM_STATUS == :database_offline or OSM_STATUS == :api_offline
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response.headers['Error'] = "Database offline for maintenance"
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render :nothing => true, :status => :service_unavailable
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return false
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end
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end
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def check_api_writable
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if OSM_STATUS == :database_offline or OSM_STATUS == :database_readonly or
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OSM_STATUS == :api_offline or OSM_STATUS == :api_readonly
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response.headers['Error'] = "Database offline for maintenance"
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render :nothing => true, :status => :service_unavailable
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return false
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end
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end
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def require_public_data
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unless @user.data_public?
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response.headers['Error'] = "You must make your edits public to upload new data"
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render :nothing => true, :status => :forbidden
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return false
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end
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end
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# Report and error to the user
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# (If anyone ever fixes Rails so it can set a http status "reason phrase",
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# rather than only a status code and having the web engine make up a
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# phrase from that, we can also put the error message into the status
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# message. For now, rails won't let us)
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def report_error(message, status = :bad_request)
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# Todo: some sort of escaping of problem characters in the message
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response.headers['Error'] = message
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render :text => message, :status => status
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end
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private
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# extract authorisation credentials from headers, returns user = nil if none
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def get_auth_data
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if request.env.has_key? 'X-HTTP_AUTHORIZATION' # where mod_rewrite might have put it
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authdata = request.env['X-HTTP_AUTHORIZATION'].to_s.split
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elsif request.env.has_key? 'REDIRECT_X_HTTP_AUTHORIZATION' # mod_fcgi
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authdata = request.env['REDIRECT_X_HTTP_AUTHORIZATION'].to_s.split
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elsif request.env.has_key? 'HTTP_AUTHORIZATION' # regular location
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authdata = request.env['HTTP_AUTHORIZATION'].to_s.split
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end
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# only basic authentication supported
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if authdata and authdata[0] == 'Basic'
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user, pass = Base64.decode64(authdata[1]).split(':',2)
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end
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return [user, pass]
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end
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end
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