Add support for putting the site in an offline mode where it operates

[rails.git] / app / controllers / application.rb

diff --git a/app/controllers/application.rb b/app/controllers/application.rb
index df94000be9e8307400587fc67d69ddb8915b52e1..7570fd82a072d2af2d2e70dd0e33cd2d83df391d 100644 (file)
--- a/app/controllers/application.rb
+++ b/app/controllers/application.rb
@@ -2,8 +2,20 @@
 # Likewise, all the methods added will be available for all controllers.
 class ApplicationController < ActionController::Base
 
+  if OSM_STATUS == :database_offline
+    session :off
+  end
+
   def authorize_web
-    @user = User.find_by_token(session[:token])
+    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
@@ -11,48 +23,62 @@ class ApplicationController < ActionController::Base
   end
 
   def authorize(realm='Web Password', errormessage="Couldn't authenticate you") 
-    unless request.get?
-      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, passwd) # basic auth
-      end
-
-      # handle authenticate pass/fail
-      if @user
-        # user exists and password is correct ... horray! 
-        if @user.methods.include? 'lastlogin'         # note last login 
-          @session['lastlogin'] = user.lastlogin 
-          @user.last.login = Time.now 
-          @user.save() 
-          @session["User.id"] = @user.id 
-        end             
-      else 
-        # 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, 401) # :unauthorized
-      end 
+    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_database_availability
+    if OSM_STATUS == :database_offline
+      redirect_to :controller => 'site', :action => 'offline'
+    end
+  end
+
+  def check_read_availability
+    if OSM_STATUS == :database_offline or OSM_STATUS == :api_offline
+      response.headers['Error'] = "Database offline for maintenance"
+      render :nothing => true, :status => :service_unavailable
+      return false
+    end
+  end
+
+  def check_write_availability
+    if OSM_STATUS == :database_offline or OSM_STATUS == :api_offline or OSM_STATUS == :api_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 :nothing => true, :status => 400
+    render :nothing => true, :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
-  private 
   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 
@@ -61,7 +87,7 @@ class ApplicationController < ActionController::Base
     end 
     # only basic authentication supported
     if authdata and authdata[0] == 'Basic' 
-      user, pass = Base64.decode64(authdata[1]).split(':')[0..1] 
+      user, pass = Base64.decode64(authdata[1]).split(':',2)
     end 
     return [user, pass] 
   end