Adds rail

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

diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 2093a959c85af202b2d4a4dfce420578f65489c9..618f08a1fc84e3fb6281d15b4dca21f6addfc5e1 100644 (file)
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -1,25 +1,134 @@
-# 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
 class ApplicationController < ActionController::Base

+  include SessionPersistence

 
 

-  if OSM_STATUS == :database_readonly or OSM_STATUS == :database_offline
-    session :off
-  end
+  protect_from_forgery
+
+  before_action :fetch_body

 
   def authorize_web
     if session[:user]
 
   def authorize_web
     if session[:user]

-      @user = User.find(session[:user], :conditions => {:visible => true})
+      @user = User.where(:id => session[:user]).where("status IN ('active', 'confirmed', 'suspended')").first
+
+      if @user.status == "suspended"
+        session.delete(:user)
+        session_expires_automatically
+
+        redirect_to :controller => "user", :action => "suspended"
+
+      # don't allow access to any auth-requiring part of the site unless
+      # the new CTs have been seen (and accept/decline chosen).
+      elsif !@user.terms_seen && flash[:skip_terms].nil?
+        flash[:notice] = t "user.terms.you need to accept or decline"
+        if params[:referer]
+          redirect_to :controller => "user", :action => "terms", :referer => params[:referer]
+        else
+          redirect_to :controller => "user", :action => "terms", :referer => request.fullpath
+        end
+      end

     elsif session[:token]
     elsif session[:token]

-      @user = User.authenticate(:token => session[:token])
-      session[:user] = @user.id
+      if @user = User.authenticate(:token => session[:token])
+        session[:user] = @user.id
+      end

     end
     end

-  rescue Exception => ex
-    logger.info("Exception authorizing user: #{ex.to_s}")
+  rescue StandardError => ex
+    logger.info("Exception authorizing user: #{ex}")
+    reset_session

     @user = nil
   end
 
   def require_user
     @user = nil
   end
 
   def require_user

-    redirect_to :controller => 'user', :action => 'login', :referer => request.request_uri unless @user
+    unless @user
+      if request.get?
+        redirect_to :controller => "user", :action => "login", :referer => request.fullpath
+      else
+        render :text => "", :status => :forbidden
+      end
+    end
+  end
+
+  def require_oauth
+    @oauth = @user.access_token(OAUTH_KEY) if @user && defined? OAUTH_KEY
+  end
+
+  ##
+  # requires the user to be logged in by the token or HTTP methods, or have an
+  # OAuth token with the right capability. this method is a bit of a pain to call
+  # directly, since it's cumbersome to call filters with arguments in rails. to
+  # make it easier to read and write the code, there are some utility methods
+  # below.
+  def require_capability(cap)
+    # when the current token is nil, it means the user logged in with a different
+    # method, otherwise an OAuth token was used, which has to be checked.
+    unless current_token.nil?
+      unless current_token.read_attribute(cap)
+        report_error "OAuth token doesn't have that capability.", :forbidden
+        return false
+      end
+    end
+  end
+
+  ##
+  # require the user to have cookies enabled in their browser
+  def require_cookies
+    if request.cookies["_osm_session"].to_s == ""
+      if params[:cookie_test].nil?
+        session[:cookie_test] = true
+        redirect_to Hash[params].merge(:cookie_test => "true")
+        return false
+      else
+        flash.now[:warning] = t "application.require_cookies.cookies_needed"
+      end
+    else
+      session.delete(:cookie_test)
+    end
+  end
+
+  # Utility methods to make the controller filter methods easier to read and write.
+  def require_allow_read_prefs
+    require_capability(:allow_read_prefs)
+  end
+
+  def require_allow_write_prefs
+    require_capability(:allow_write_prefs)
+  end
+
+  def require_allow_write_diary
+    require_capability(:allow_write_diary)
+  end
+
+  def require_allow_write_api
+    require_capability(:allow_write_api)
+
+    if REQUIRE_TERMS_AGREED && @user.terms_agreed.nil?
+      report_error "You must accept the contributor terms before you can edit.", :forbidden
+      return false
+    end
+  end
+
+  def require_allow_read_gpx
+    require_capability(:allow_read_gpx)
+  end
+
+  def require_allow_write_gpx
+    require_capability(:allow_write_gpx)
+  end
+
+  def require_allow_write_notes
+    require_capability(:allow_write_notes)
+  end
+
+  ##
+  # require that the user is a moderator, or fill out a helpful error message
+  # and return them to the index for the controller this is wrapped from.
+  def require_moderator
+    unless @user.moderator?
+      if request.get?
+        flash[:error] = t("application.require_moderator.not_a_moderator")
+        redirect_to :action => "index"
+      else
+        render :text => "", :status => :forbidden
+      end
+    end

   end
 
   ##
   end
 
   ##


@@ -27,113 +136,217 @@ class ApplicationController < ActionController::Base
   # from the authorize method, but can be called elsewhere if authorisation
   # is optional.
   def setup_user_auth
   # from the authorize method, but can be called elsewhere if authorisation
   # is optional.
   def setup_user_auth

-    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
+    # try and setup using OAuth
+    unless Authenticator.new(self, [:token]).allow?
+      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
+    end
+
+    # have we identified the user?
+    if @user
+      # check if the user has been banned
+      if @user.blocks.active.exists?
+        # NOTE: need slightly more helpful message than this.
+        report_error t("application.setup_user_auth.blocked"), :forbidden
+      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 REQUIRE_TERMS_SEEN && !@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
   end
 

-  def authorize(realm='Web Password', errormessage="Couldn't authenticate you") 
+  def authorize(realm = "Web Password", errormessage = "Couldn't authenticate you")

     # make the @user object from any auth sources we have
     setup_user_auth
 
     # handle authenticate pass/fail
     unless @user
       # no auth, the user does not exist or the password was wrong
     # make the @user object from any auth sources we have
     setup_user_auth
 
     # handle authenticate pass/fail
     unless @user
       # no auth, the user does not exist or the password was wrong

-      response.headers["WWW-Authenticate"] = "Basic realm=\"#{realm}\"" 
+      response.headers["WWW-Authenticate"] = "Basic realm=\"#{realm}\""

       render :text => errormessage, :status => :unauthorized
       return false
       render :text => errormessage, :status => :unauthorized
       return false

-    end 
-  end 
+    end
+  end
+
+  ##
+  # to be used as a before_filter *after* authorize. this checks that
+  # the user is a moderator and, if not, returns a forbidden error.
+  #
+  # NOTE: this isn't a very good way of doing it - it duplicates logic
+  # from require_moderator - but what we really need to do is a fairly
+  # drastic refactoring based on :format and respond_to? but not a
+  # good idea to do that in this branch.
+  def authorize_moderator(errormessage = "Access restricted to moderators")
+    # check user is a moderator
+    unless @user.moderator?
+      render :text => errormessage, :status => :forbidden
+      return false
+    end
+  end

 
   def check_database_readable(need_api = false)
 
   def check_database_readable(need_api = false)

-    if OSM_STATUS == :database_offline or (need_api and OSM_STATUS == :api_offline)
-      redirect_to :controller => 'site', :action => 'offline'
+    if STATUS == :database_offline || (need_api && STATUS == :api_offline)
+      if request.xhr?
+        report_error "Database offline for maintenance", :service_unavailable
+      else
+        redirect_to :controller => "site", :action => "offline"
+      end

     end
   end
 
   def check_database_writable(need_api = false)
     end
   end
 
   def check_database_writable(need_api = false)

-    if OSM_STATUS == :database_offline or OSM_STATUS == :database_readonly or
-       (need_api and (OSM_STATUS == :api_offline or OSM_STATUS == :api_readonly))
-      redirect_to :controller => 'site', :action => 'offline'
+    if STATUS == :database_offline || STATUS == :database_readonly ||
+       (need_api && (STATUS == :api_offline || STATUS == :api_readonly))
+      if request.xhr?
+        report_error "Database offline for maintenance", :service_unavailable
+      else
+        redirect_to :controller => "site", :action => "offline"
+      end

     end
   end
 
   def check_api_readable
     end
   end
 
   def check_api_readable

-    if OSM_STATUS == :database_offline or OSM_STATUS == :api_offline
-      response.headers['Error'] = "Database offline for maintenance"
-      render :nothing => true, :status => :service_unavailable
+    if api_status == :offline
+      report_error "Database offline for maintenance", :service_unavailable

       return false
     end
   end
 
   def check_api_writable
       return false
     end
   end
 
   def check_api_writable

-    if OSM_STATUS == :database_offline or OSM_STATUS == :database_readonly or
-       OSM_STATUS == :api_offline or OSM_STATUS == :api_readonly
-      response.headers['Error'] = "Database offline for maintenance"
-      render :nothing => true, :status => :service_unavailable
+    unless api_status == :online
+      report_error "Database offline for maintenance", :service_unavailable

       return false
     end
   end
 
       return false
     end
   end
 

+  def database_status
+    if STATUS == :database_offline
+      :offline
+    elsif STATUS == :database_readonly
+      :readonly
+    else
+      :online
+    end
+  end
+
+  def api_status
+    status = database_status
+    if status == :online
+      if STATUS == :api_offline
+        status = :offline
+      elsif STATUS == :api_readonly
+        status = :readonly
+      end
+    end
+    status
+  end
+
+  def gpx_status
+    status = database_status
+    status = :offline if status == :online && STATUS == :gpx_offline
+    status
+  end
+

   def require_public_data
     unless @user.data_public?
   def require_public_data
     unless @user.data_public?

-      response.headers['Error'] = "You must make your edits public to upload new data"
-      render :nothing => true, :status => :forbidden
+      report_error "You must make your edits public to upload new data", :forbidden

       return false
     end
   end
 
   # Report and error to the user
   # (If anyone ever fixes Rails so it can set a http status "reason phrase",
       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 
+  #  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, status = :bad_request)
   #  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, status = :bad_request)

-    # Todo: some sort of escaping of problem characters in the message
-    response.headers['Error'] = message
-    render :text => message, :status => status
+    # TODO: some sort of escaping of problem characters in the message
+    response.headers["Error"] = message
+
+    if request.headers["X-Error-Format"] &&
+       request.headers["X-Error-Format"].downcase == "xml"
+      result = OSM::API.new.get_xml_doc
+      result.root.name = "osmError"
+      result.root << (XML::Node.new("status") << "#{Rack::Utils.status_code(status)} #{Rack::Utils::HTTP_STATUS_CODES[status]}")
+      result.root << (XML::Node.new("message") << message)
+
+      render :text => result.to_s, :content_type => "text/xml"
+    else
+      render :text => message, :status => status, :content_type => "text/plain"
+    end

   end
   end

-  
+

   def set_locale
   def set_locale

-    response.header['Vary'] = 'Accept-Language'
+    response.header["Vary"] = "Accept-Language"

 
 

-    if @user
-      if !@user.languages.empty?
-        request.user_preferred_languages = @user.languages
-        response.header['Vary'] = '*'
-      elsif !request.user_preferred_languages.empty?
-        @user.languages = request.user_preferred_languages
-        @user.save
-      end
+    if @user && !@user.languages.empty?
+      http_accept_language.user_preferred_languages = @user.languages
+      response.header["Vary"] = "*"

     end
 
     end
 

-    I18n.locale = request.compatible_language_from(I18n.available_locales)
+    I18n.locale = select_locale

 
 

-    response.headers['Content-Language'] = I18n.locale.to_s
+    if @user && @user.languages.empty? && !http_accept_language.user_preferred_languages.empty?
+      @user.languages = http_accept_language.user_preferred_languages
+      @user.save
+    end
+
+    response.headers["Content-Language"] = I18n.locale.to_s

   end
 
   end
 

-  def api_call_handle_error
-    begin
-      yield
-    rescue ActiveRecord::RecordNotFound => ex
-      render :nothing => true, :status => :not_found
-    rescue LibXML::XML::Error, ArgumentError => ex
-      report_error ex.message, :bad_request
-    rescue ActiveRecord::RecordInvalid => ex
-      message = "#{ex.record.class} #{ex.record.id}: "
-      ex.record.errors.each { |attr,msg| message << "#{attr}: #{msg} (#{ex.record[attr].inspect})" }
-      report_error message, :bad_request
-    rescue OSM::APIError => ex
-      report_error ex.message, ex.status
-    rescue Exception => ex
-      report_error "#{ex.class}: #{ex.message}", :internal_server_error
+  def select_locale(locales = I18n.available_locales)
+    if params[:locale]
+      http_accept_language.user_preferred_languages = [params[:locale]]

     end
     end

+
+    if http_accept_language.compatible_language_from(locales).nil?
+      http_accept_language.user_preferred_languages = http_accept_language.user_preferred_languages.collect do |pl|
+        pls = [pl]
+
+        while pl.match(/^(.*)-[^-]+$/)
+          pls.push($1) if locales.include?($1) || locales.include?($1.to_sym)
+          pl = $1
+        end
+
+        pls
+      end.flatten
+    end
+
+    http_accept_language.compatible_language_from(locales) || I18n.default_locale
+  end
+
+  helper_method :select_locale
+
+  def api_call_handle_error
+    yield
+  rescue ActiveRecord::RecordNotFound => ex
+    render :text => "", :status => :not_found
+  rescue LibXML::XML::Error, ArgumentError => ex
+    report_error ex.message, :bad_request
+  rescue ActiveRecord::RecordInvalid => ex
+    message = "#{ex.record.class} #{ex.record.id}: "
+    ex.record.errors.each { |attr, msg| message << "#{attr}: #{msg} (#{ex.record[attr].inspect})" }
+    report_error message, :bad_request
+  rescue OSM::APIError => ex
+    report_error ex.message, ex.status
+  rescue AbstractController::ActionNotFound => ex
+    raise
+  rescue StandardError => ex
+    logger.info("API threw unexpected #{ex.class} exception: #{ex.message}")
+    ex.backtrace.each { |l| logger.info(l) }
+    report_error "#{ex.class}: #{ex.message}", :internal_server_error

   end
 
   ##
   end
 
   ##


@@ -141,30 +354,125 @@ class ApplicationController < ActionController::Base
   # or raises a suitable error. +method+ should be a symbol, e.g: :put or :get.
   def assert_method(method)
     ok = request.send((method.to_s.downcase + "?").to_sym)
   # or raises a suitable error. +method+ should be a symbol, e.g: :put or :get.
   def assert_method(method)
     ok = request.send((method.to_s.downcase + "?").to_sym)

-    raise OSM::APIBadMethodError.new(method) unless ok
+    fail OSM::APIBadMethodError.new(method) unless ok

   end
 
   end
 

+  ##
+  # wrap an api call in a timeout

   def api_call_timeout
   def api_call_timeout

-    Timeout::timeout(APP_CONFIG['api_timeout'], OSM::APITimeoutError) do
+    OSM::Timer.timeout(API_TIMEOUT) do
+      yield
+    end
+  rescue Timeout::Error
+    raise OSM::APITimeoutError
+  end
+
+  ##
+  # wrap a web page in a timeout
+  def web_timeout
+    OSM::Timer.timeout(WEB_TIMEOUT) do

       yield
     end
       yield
     end

+  rescue ActionView::Template::Error => ex
+    ex = ex.original_exception
+
+    if ex.is_a?(ActiveRecord::StatementInvalid) && ex.message =~ /execution expired/
+      ex = Timeout::Error.new
+    end
+
+    if ex.is_a?(Timeout::Error)
+      render :action => "timeout"
+    else
+      raise
+    end
+  rescue Timeout::Error
+    render :action => "timeout"

   end
 
   end
 

-private 
+  ##
+  # ensure that there is a "this_user" instance variable
+  def lookup_this_user
+    unless @this_user = User.active.find_by_display_name(params[:display_name])
+      render_unknown_user params[:display_name]
+    end
+  end
+
+  ##
+  # render a "no such user" page
+  def render_unknown_user(name)
+    @title = t "user.no_such_user.title"
+    @not_found_user = name
+
+    respond_to do |format|
+      format.html { render :template => "user/no_such_user", :status => :not_found }
+      format.all { render :text => "", :status => :not_found }
+    end
+  end
+
+  ##
+  # Unfortunately if a PUT or POST request that has a body fails to
+  # read it then Apache will sometimes fail to return the response it
+  # is given to the client properly, instead erroring:
+  #
+  #   https://issues.apache.org/bugzilla/show_bug.cgi?id=44782
+  #
+  # To work round this we call rewind on the body here, which is added
+  # as a filter, to force it to be fetched from Apache into a file.
+  def fetch_body
+    request.body.rewind
+  end
+
+  def map_layout
+    request.xhr? ? "xhr" : "map"
+  end
+
+  def preferred_editor
+    editor = if params[:editor]
+               params[:editor]
+             elsif @user && @user.preferred_editor
+               @user.preferred_editor
+             else
+               DEFAULT_EDITOR
+             end
+
+    if request.env["HTTP_USER_AGENT"] =~ /MSIE|Trident/ && editor == "id"
+      editor = "potlatch2"
+    end
+
+    editor
+  end
+
+  helper_method :preferred_editor
+
+  private
+

   # extract authorisation credentials from headers, returns user = nil if none
   # 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 
+  def get_auth_data
+    if request.env.key? "X-HTTP_AUTHORIZATION"          # where mod_rewrite might have put it
+      authdata = request.env["X-HTTP_AUTHORIZATION"].to_s.split
+    elsif request.env.key? "REDIRECT_X_HTTP_AUTHORIZATION"          # mod_fcgi
+      authdata = request.env["REDIRECT_X_HTTP_AUTHORIZATION"].to_s.split
+    elsif request.env.key? "HTTP_AUTHORIZATION"         # regular location
+      authdata = request.env["HTTP_AUTHORIZATION"].to_s.split
+    end

     # only basic authentication supported
     # only basic authentication supported

-    if authdata and authdata[0] == 'Basic' 
-      user, pass = Base64.decode64(authdata[1]).split(':',2)
-    end 
-    return [user, pass] 
-  end 
+    if authdata && authdata[0] == "Basic"
+      user, pass = Base64.decode64(authdata[1]).split(":", 2)
+    end
+    [user, pass]
+  end
+
+  # used by oauth plugin to get the current user
+  def current_user
+    @user
+  end
+
+  # used by oauth plugin to set the current user
+  def current_user=(user)
+    @user = user
+  end

 
 

+  # override to stop oauth plugin sending errors
+  def invalid_oauth_response
+  end

 end
 end