X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/a3a792e13772282c006556081c65e12e37ad273b..4de68be3034411cbb21a14f51611d204c2efd1af:/app/controllers/amf_controller.rb

diff --git a/app/controllers/amf_controller.rb b/app/controllers/amf_controller.rb
index f903e1ce4..7c6a140bd 100644
--- a/app/controllers/amf_controller.rb
+++ b/app/controllers/amf_controller.rb
@@ -5,8 +5,8 @@
 #
 # Helper functions are in /lib/potlatch.rb
 #
-# Author::	editions Systeme D / Richard Fairhurst 2004-2008
-# Licence::	public domain.
+# Author::  editions Systeme D / Richard Fairhurst 2004-2008
+# Licence:: public domain.
 #
 # == General structure
 #
@@ -24,8 +24,8 @@
 # == Debugging
 # 
 # Any method that returns a status code (0 for ok) can also send:
-#	return(-1,"message")	    	<-- just puts up a dialogue
-#	return(-2,"message")	    	<-- also asks the user to e-mail me
+# return(-1,"message")        <-- just puts up a dialogue
+# return(-2,"message")        <-- also asks the user to e-mail me
 # return(-3,["type",v],id)    <-- version conflict
 # return(-4,"type",id)        <-- object not found
 # -5 indicates the method wasn't called (due to a previous error)
@@ -43,9 +43,7 @@ class AmfController < ApplicationController
   # Help methods for checking boundary sanity and area size
   include MapBoundary
 
-  session :off
   before_filter :check_api_writable
-  around_filter :api_call_timeout, :only => [:amf_read]
 
   # Main AMF handlers: process the raw AMF string (using AMF library) and
   # calls each action (private method) accordingly.
@@ -54,45 +52,47 @@ class AmfController < ApplicationController
   def amf_read
     if request.post?
       req=StringIO.new(request.raw_post+0.chr)# Get POST data as request
-                                # (cf http://www.ruby-forum.com/topic/122163)
-      req.read(2)								# Skip version indicator and client ID
-      results={}								# Results of each body
+                                              # (cf http://www.ruby-forum.com/topic/122163)
+      req.read(2)                             # Skip version indicator and client ID
 
       # Parse request
 
-      headers=AMF.getint(req)				# Read number of headers
-
-      headers.times do					# Read each header
-        name=AMF.getstring(req)				#  |
-        req.getc				   	#  | skip boolean
-        value=AMF.getvalue(req)				#  |
-        header["name"]=value				#  |
+      headers=AMF.getint(req)           # Read number of headers
+      headers.times do                  # Read each header
+        name=AMF.getstring(req)         #  |
+        req.getc                        #  | skip boolean
+        value=AMF.getvalue(req)         #  |
+        header["name"]=value            #  |
       end
 
-      bodies=AMF.getint(req)				# Read number of bodies
-      bodies.times do					# Read each body
-        message=AMF.getstring(req)			#  | get message name
-        index=AMF.getstring(req)			#  | get index in response sequence
-        bytes=AMF.getlong(req)				#  | get total size in bytes
-        args=AMF.getvalue(req)				#  | get response (probably an array)
-        logger.info("Executing AMF #{message}(#{args.join(',')}):#{index}")
-
-        case message
-          when 'getpresets';		  results[index]=AMF.putdata(index,getpresets(args[0]))
-          when 'whichways';		    results[index]=AMF.putdata(index,whichways(*args))
-          when 'whichways_deleted';	results[index]=AMF.putdata(index,whichways_deleted(*args))
-          when 'getway';	    	  results[index]=AMF.putdata(index,getway(args[0].to_i))
-          when 'getrelation';		  results[index]=AMF.putdata(index,getrelation(args[0].to_i))
-          when 'getway_old';		  results[index]=AMF.putdata(index,getway_old(args[0].to_i,args[1]))
-          when 'getway_history';	results[index]=AMF.putdata(index,getway_history(args[0].to_i))
-          when 'getnode_history';	results[index]=AMF.putdata(index,getnode_history(args[0].to_i))
-          when 'findgpx';		      results[index]=AMF.putdata(index,findgpx(*args))
-          when 'findrelations';		results[index]=AMF.putdata(index,findrelations(*args))
-          when 'getpoi';		      results[index]=AMF.putdata(index,getpoi(*args))
+      bodies=AMF.getint(req)            # Read number of bodies
+      render :content_type => "application/x-amf", :text => proc { |response, output| 
+        a,b=bodies.divmod(256)
+        output.write 0.chr+0.chr+0.chr+0.chr+a.chr+b.chr
+        bodies.times do                 # Read each body
+          message=AMF.getstring(req)    #  | get message name
+          index=AMF.getstring(req)      #  | get index in response sequence
+          bytes=AMF.getlong(req)        #  | get total size in bytes
+          args=AMF.getvalue(req)        #  | get response (probably an array)
+          result=''
+          logger.info("Executing AMF #{message}(#{args.join(',')}):#{index}")
+
+          case message
+            when 'getpresets';        result=AMF.putdata(index,getpresets(*args))
+            when 'whichways';         result=AMF.putdata(index,whichways(*args))
+            when 'whichways_deleted'; result=AMF.putdata(index,whichways_deleted(*args))
+            when 'getway';            result=AMF.putdata(index,getway(args[0].to_i))
+            when 'getrelation';       result=AMF.putdata(index,getrelation(args[0].to_i))
+            when 'getway_old';        result=AMF.putdata(index,getway_old(args[0].to_i,args[1]))
+            when 'getway_history';    result=AMF.putdata(index,getway_history(args[0].to_i))
+            when 'getnode_history';   result=AMF.putdata(index,getnode_history(args[0].to_i))
+            when 'findgpx';           result=AMF.putdata(index,findgpx(*args))
+            when 'findrelations';     result=AMF.putdata(index,findrelations(*args))
+            when 'getpoi';            result=AMF.putdata(index,getpoi(*args))
+          end
+          output.write(result)
         end
-      end
-      logger.info("Encoding AMF results")
-      sendresponse(results)
+      }
     else
       render :nothing => true, :status => :method_not_allowed
     end
@@ -102,49 +102,51 @@ class AmfController < ApplicationController
     if request.post?
       req=StringIO.new(request.raw_post+0.chr)
       req.read(2)
-      results={}
-      renumberednodes={}			    	# Shared across repeated putways
-      renumberedways={}				    	# Shared across repeated putways
-
-      headers=AMF.getint(req)	    	# Read number of headers
-      headers.times do				    	# Read each header
-        name=AMF.getstring(req)	    #  |
-        req.getc    					      #  | skip boolean
-        value=AMF.getvalue(req)   	#  |
-        header["name"]=value	    	#  |
+      renumberednodes={}              # Shared across repeated putways
+      renumberedways={}               # Shared across repeated putways
+
+      headers=AMF.getint(req)         # Read number of headers
+      headers.times do                # Read each header
+        name=AMF.getstring(req)       #  |
+        req.getc                      #  | skip boolean
+        value=AMF.getvalue(req)       #  |
+        header["name"]=value          #  |
       end
 
-      bodies=AMF.getint(req)	    	# Read number of bodies
-      bodies.times do					      # Read each body
-        message=AMF.getstring(req)	#  | get message name
-        index=AMF.getstring(req)		#  | get index in response sequence
-        bytes=AMF.getlong(req)			#  | get total size in bytes
-        args=AMF.getvalue(req)			#  | get response (probably an array)
-        err=false                   # Abort batch on error
-
-        logger.info("Executing AMF #{message}:#{index}")
-        if err
-          results[index]=[-5,nil]
-        else
-          case message
-            when 'putway';			  orn=renumberednodes.dup
-                                  r=putway(renumberednodes,*args)
-                      						renumberednodes=r[4].dup
-                      						r[4].delete_if { |k,v| orn.has_key?(k) }
-                      						if r[2] != r[3] then renumberedways[r[2]] = r[3] end
-                      						results[index]=AMF.putdata(index,r)
-            when 'putrelation';		results[index]=AMF.putdata(index,putrelation(renumberednodes, renumberedways, *args))
-            when 'deleteway';			results[index]=AMF.putdata(index,deleteway(*args))
-            when 'putpoi';			  r=putpoi(*args)
-                      						if r[2] != r[3] then renumberednodes[r[2]] = r[3] end
-                          				results[index]=AMF.putdata(index,r)
-            when 'startchangeset';results[index]=AMF.putdata(index,startchangeset(*args))
+      bodies=AMF.getint(req)          # Read number of bodies
+      render :content_type => "application/x-amf", :text => proc { |response, output| 
+        a,b=bodies.divmod(256)
+        output.write 0.chr+0.chr+0.chr+0.chr+a.chr+b.chr
+        bodies.times do               # Read each body
+          message=AMF.getstring(req)  #  | get message name
+          index=AMF.getstring(req)    #  | get index in response sequence
+          bytes=AMF.getlong(req)      #  | get total size in bytes
+          args=AMF.getvalue(req)      #  | get response (probably an array)
+          err=false                   # Abort batch on error
+
+          logger.info("Executing AMF #{message}:#{index}")
+          result=''
+          if err
+            result=[-5,nil]
+          else
+            case message
+              when 'putway';         orn=renumberednodes.dup
+                                     r=putway(renumberednodes,*args)
+                                     r[4]=renumberednodes.reject { |k,v| orn.has_key?(k) }
+                                     if r[0]==0 and r[2] != r[3] then renumberedways[r[2]] = r[3] end
+                                     result=AMF.putdata(index,r)
+              when 'putrelation';    result=AMF.putdata(index,putrelation(renumberednodes, renumberedways, *args))
+              when 'deleteway';      result=AMF.putdata(index,deleteway(*args))
+              when 'putpoi';         r=putpoi(*args)
+                                     if r[0]==0 and r[2] != r[3] then renumberednodes[r[2]] = r[3] end
+                                     result=AMF.putdata(index,r)
+              when 'startchangeset'; result=AMF.putdata(index,startchangeset(*args))
+            end
+            if result[0]==-3 then err=true end    # If a conflict is detected, don't execute any more writes
           end
-          if results[index][0]==-3 then err=true end  # If a conflict is detected, don't execute any more writes
+          output.write(result)
         end
-      end
-      logger.info("Encoding AMF results")
-      sendresponse(results)
+      }
     else
       render :nothing => true, :status => :method_not_allowed
     end
@@ -152,62 +154,124 @@ class AmfController < ApplicationController
 
   private
 
+  def amf_handle_error(call,rootobj,rootid)
+    yield
+  rescue OSM::APIAlreadyDeletedError => ex
+    return [-4, ex.object, ex.object_id]
+  rescue OSM::APIVersionMismatchError => ex
+    return [-3, [rootobj, rootid], [ex.type.downcase, ex.id, ex.latest]]
+  rescue OSM::APIUserChangesetMismatchError => ex
+    return [-2, ex.to_s]
+  rescue OSM::APIBadBoundingBox => ex
+    return [-2, "Sorry - I can't get the map for that area. The server said: #{ex.to_s}"]
+  rescue OSM::APIError => ex
+    return [-1, ex.to_s]
+  rescue Exception => ex
+    return [-2, "An unusual error happened (in #{call}). The server said: #{ex.to_s}"]
+  end
+
+  def amf_handle_error_with_timeout(call,rootobj,rootid)
+    amf_handle_error(call,rootobj,rootid) do
+      Timeout::timeout(APP_CONFIG['api_timeout'], OSM::APITimeoutError) do
+        yield
+      end
+    end
+  end
+
   # Start new changeset
   # Returns success_code,success_message,changeset id
   
   def startchangeset(usertoken, cstags, closeid, closecomment, opennew)
-    user = getuser(usertoken)
-    if !user then return -1,"You are not logged in, so Potlatch can't write any changes to the database." end
-
-    # close previous changeset and add comment
-    if closeid
-      cs = Changeset.find(closeid)
-      cs.set_closed_time_now
-      if cs.user_id!=user.id
-        return -2,"You cannot close that changeset because you're not the person who opened it.",nil
-      elsif closecomment.empty?
-        cs.save!
-      else
-        cs.tags['comment']=closecomment
+    amf_handle_error("'startchangeset'",nil,nil) do
+      user = getuser(usertoken)
+      if !user then return -1,"You are not logged in, so Potlatch can't write any changes to the database." end
+      unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
+
+      # close previous changeset and add comment
+      if closeid
+        cs = Changeset.find(closeid.to_i)
+        cs.set_closed_time_now
+        if cs.user_id!=user.id
+          raise OSM::APIUserChangesetMismatchError.new
+        elsif closecomment.empty?
+          cs.save!
+        else
+          cs.tags['comment']=closecomment
+          cs.save_with_tags!
+        end
+      end
+  
+      # open a new changeset
+      if opennew!=0
+        cs = Changeset.new
+        cs.tags = cstags
+        cs.user_id = user.id
+        if !closecomment.empty? then cs.tags['comment']=closecomment end
+        # smsm1 doesn't like the next two lines and thinks they need to be abstracted to the model more/better
+        cs.created_at = Time.now.getutc
+        cs.closed_at = cs.created_at + Changeset::IDLE_TIMEOUT
         cs.save_with_tags!
+        return [0,'',cs.id]
+      else
+        return [0,'',nil]
       end
     end
-	
-    # open a new changeset
-    if opennew!=0
-      cs = Changeset.new
-      cs.tags = cstags
-      cs.user_id = user.id
-      # smsm1 doesn't like the next two lines and thinks they need to be abstracted to the model more/better
-      cs.created_at = Time.now.getutc
-      cs.closed_at = cs.created_at + Changeset::IDLE_TIMEOUT
-      cs.save_with_tags!
-      return [0,'',cs.id]
-    else
-      return [0,'',nil]
-    end
   end
 
   # Return presets (default tags, localisation etc.):
   # uses POTLATCH_PRESETS global, set up in OSM::Potlatch.
 
-  def getpresets(lang) #:doc:
-	lang.gsub!(/[^\w\-]/,'')
-
-    begin
-      localised = YAML::load(File.open("#{RAILS_ROOT}/config/potlatch/localised/#{lang}/localised.yaml"))
-    rescue
-      localised = "" # guess we'll just have to use the hardcoded English text instead
-	end
+  def getpresets(usertoken,lang) #:doc:
+    user = getuser(usertoken)
 
-    begin
-      help = File.read("#{RAILS_ROOT}/config/potlatch/localised/#{lang}/help.html")
-    rescue
-      help = File.read("#{RAILS_ROOT}/config/potlatch/localised/en/help.html")
+    if user && !user.languages.empty?
+      request.user_preferred_languages = user.languages
     end
+
+    lang = request.compatible_language_from(getlocales)
+    (real_lang, localised) = getlocalized(lang)
+
+    # Tell Potlatch what language it's using
+    localised["__potlatch_locale"] = real_lang
+
+    # Get help from i18n but delete it so we won't pass it around
+    # twice for nothing
+    help = localised["help_html"]
+    localised.delete("help_html")
+
+    # Populate icon names
+    POTLATCH_PRESETS[10].each { |id|
+      POTLATCH_PRESETS[11][id] = localised["preset_icon_#{id}"]
+      localised.delete("preset_icon_#{id}")
+    }
+
     return POTLATCH_PRESETS+[localised,help]
   end
 
+  def getlocalized(lang)
+    # What we end up actually using. Reported in Potlatch's created_by=* string
+    loaded_lang = 'en'
+
+    # Load English defaults
+    en = YAML::load(File.open("#{RAILS_ROOT}/config/potlatch/locales/en.yml"))["en"]
+
+    if lang == 'en'
+      return [loaded_lang, en]
+    else
+      # Use English as a fallback
+      begin
+        other = YAML::load(File.open("#{RAILS_ROOT}/config/potlatch/locales/#{lang}.yml"))[lang]
+        loaded_lang = lang
+      rescue
+        other = en
+      end
+
+      # We have to return a flat list and some of the keys won't be
+      # translated (probably)
+      return [loaded_lang, en.merge(other)]
+    end
+  end
+
   ##
   # Find all the ways, POI nodes (i.e. not part of ways), and relations
   # in a given bounding box. Nodes are returned in full; ways and relations 
@@ -223,98 +287,93 @@ class AmfController < ApplicationController
   # used in any way, rel is any relation which refers to either a way
   # or node that we're returning.
   def whichways(xmin, ymin, xmax, ymax) #:doc:
-    enlarge = [(xmax-xmin)/8,0.01].min
-    xmin -= enlarge; ymin -= enlarge
-    xmax += enlarge; ymax += enlarge
-
-    # check boundary is sane and area within defined
-    # see /config/application.yml
-    check_boundaries(xmin, ymin, xmax, ymax)
-
-    if POTLATCH_USE_SQL then
-      ways = sql_find_ways_in_area(xmin, ymin, xmax, ymax)
-      points = sql_find_pois_in_area(xmin, ymin, xmax, ymax)
-      relations = sql_find_relations_in_area_and_ways(xmin, ymin, xmax, ymax, ways.collect {|x| x[0]})
-    else
-      # find the way ids in an area
-      nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => ["current_nodes.visible = ?", true], :include => :ways)
-      ways = nodes_in_area.inject([]) { |sum, node| 
-        visible_ways = node.ways.select { |w| w.visible? }
-        sum + visible_ways.collect { |w| [w.id,w.version] }
-      }.uniq
-      ways.delete([])
-
-      # find the node ids in an area that aren't part of ways
-      nodes_not_used_in_area = nodes_in_area.select { |node| node.ways.empty? }
-      points = nodes_not_used_in_area.collect { |n| [n.id, n.lon, n.lat, n.tags, n.version] }.uniq
-
-      # find the relations used by those nodes and ways
-      relations = Relation.find_for_nodes(nodes_in_area.collect { |n| n.id }, :conditions => {:visible => true}) +
-                  Relation.find_for_ways(ways.collect { |w| w[0] }, :conditions => {:visible => true})
-      relations = relations.collect { |relation| [relation.id,relation.version] }.uniq
-    end
+    amf_handle_error_with_timeout("'whichways'",nil,nil) do
+      enlarge = [(xmax-xmin)/8,0.01].min
+      xmin -= enlarge; ymin -= enlarge
+      xmax += enlarge; ymax += enlarge
+
+      # check boundary is sane and area within defined
+      # see /config/application.yml
+      check_boundaries(xmin, ymin, xmax, ymax)
 
-    [0, '', ways, points, relations]
+      if POTLATCH_USE_SQL then
+        ways = sql_find_ways_in_area(xmin, ymin, xmax, ymax)
+        points = sql_find_pois_in_area(xmin, ymin, xmax, ymax)
+        relations = sql_find_relations_in_area_and_ways(xmin, ymin, xmax, ymax, ways.collect {|x| x[0]})
+      else
+        # find the way ids in an area
+        nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => ["current_nodes.visible = ?", true], :include => :ways)
+        ways = nodes_in_area.inject([]) { |sum, node| 
+          visible_ways = node.ways.select { |w| w.visible? }
+          sum + visible_ways.collect { |w| [w.id,w.version] }
+        }.uniq
+        ways.delete([])
+
+        # find the node ids in an area that aren't part of ways
+        nodes_not_used_in_area = nodes_in_area.select { |node| node.ways.empty? }
+        points = nodes_not_used_in_area.collect { |n| [n.id, n.lon, n.lat, n.tags, n.version] }.uniq
+
+        # find the relations used by those nodes and ways
+        relations = Relation.find_for_nodes(nodes_in_area.collect { |n| n.id }, :conditions => {:visible => true}) +
+                    Relation.find_for_ways(ways.collect { |w| w[0] }, :conditions => {:visible => true})
+        relations = relations.collect { |relation| [relation.id,relation.version] }.uniq
+      end
 
-  rescue OSM::APITimeoutError => err
-    [-1,"Sorry, I can't get the map for that area - try zooming in further. The server said: #{err}"]
-  rescue Exception => err
-    [-2,"Sorry - I can't get the map for that area. The server said: #{err}",[],[],[] ]
+      [0, '', ways, points, relations]
+    end
   end
 
   # Find deleted ways in current bounding box (similar to whichways, but ways
   # with a deleted node only - not POIs or relations).
 
   def whichways_deleted(xmin, ymin, xmax, ymax) #:doc:
-    enlarge = [(xmax-xmin)/8,0.01].min
-    xmin -= enlarge; ymin -= enlarge
-    xmax += enlarge; ymax += enlarge
+    amf_handle_error_with_timeout("'whichways_deleted'",nil,nil) do
+      enlarge = [(xmax-xmin)/8,0.01].min
+      xmin -= enlarge; ymin -= enlarge
+      xmax += enlarge; ymax += enlarge
 
-    # check boundary is sane and area within defined
-    # see /config/application.yml
-    begin
+      # check boundary is sane and area within defined
+      # see /config/application.yml
       check_boundaries(xmin, ymin, xmax, ymax)
-    rescue Exception => err
-      return [-2,"Sorry - I can't get the map for that area. The server said: #{err}",[]]
-    end
 
-    nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => ["current_ways.visible = ?", false], :include => :ways_via_history)
-    way_ids = nodes_in_area.collect { |node| node.ways_via_history_ids }.flatten.uniq
+      nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => ["current_ways.visible = ?", false], :include => :ways_via_history)
+      way_ids = nodes_in_area.collect { |node| node.ways_via_history_ids }.flatten.uniq
 
-    [0,'',way_ids]
+      [0,'',way_ids]
+    end
   end
 
   # Get a way including nodes and tags.
-  # Returns the way id, a Potlatch-style array of points, a hash of tags, and the version number.
+  # Returns the way id, a Potlatch-style array of points, a hash of tags, the version number, and the user ID.
 
   def getway(wayid) #:doc:
-    if POTLATCH_USE_SQL then
+    amf_handle_error_with_timeout("'getway' #{wayid}" ,'way',wayid) do
+      if POTLATCH_USE_SQL then
         points = sql_get_nodes_in_way(wayid)
         tags = sql_get_tags_in_way(wayid)
         version = sql_get_way_version(wayid)
+        uid = sql_get_way_user(wayid)
       else
         # Ideally we would do ":include => :nodes" here but if we do that
         # then rails only seems to return the first copy of a node when a
         # way includes a node more than once
-        begin
-          way = Way.find(wayid, :include => { :nodes => :node_tags })
-        rescue ActiveRecord::RecordNotFound
-          return [-4, 'way', wayid, [], {}, nil]
-        end
+        way = Way.find(:first, :conditions => { :id => wayid }, :include => { :nodes => :node_tags })
 
         # check case where way has been deleted or doesn't exist
-        return [-4, 'way', wayid, [], {}, nil] if way.nil? or !way.visible
+        return [-4, 'way', wayid] if way.nil? or !way.visible
 
         points = way.nodes.collect do |node|
-        nodetags=node.tags
-        nodetags.delete('created_by')
-        [node.lon, node.lat, node.id, nodetags, node.version]
+          nodetags=node.tags
+          nodetags.delete('created_by')
+          [node.lon, node.lat, node.id, nodetags, node.version]
+        end
+        tags = way.tags
+        version = way.version
+        uid = way.changeset.user.id
       end
-      tags = way.tags
-      version = way.version
-    end
 
-    [0, '', wayid, points, tags, version]
+      [0, '', wayid, points, tags, version, uid]
+    end
   end
   
   # Get an old version of a way, and all constituent nodes.
@@ -333,33 +392,35 @@ class AmfController < ApplicationController
   # 5. is this the current, visible version? (boolean)
   
   def getway_old(id, timestamp) #:doc:
-    if timestamp == ''
-      # undelete
-      old_way = OldWay.find(:first, :conditions => ['visible = ? AND id = ?', true, id], :order => 'version DESC')
-      points = old_way.get_nodes_undelete unless old_way.nil?
-    else
-      begin
-        # revert
-        timestamp = DateTime.strptime(timestamp.to_s, "%d %b %Y, %H:%M:%S")
-        old_way = OldWay.find(:first, :conditions => ['id = ? AND timestamp <= ?', id, timestamp], :order => 'timestamp DESC')
-        unless old_way.nil?
-          points = old_way.get_nodes_revert(timestamp)
-          if !old_way.visible
-            return [-1, "Sorry, the way was deleted at that time - please revert to a previous version.", id, [], {}, nil, false]
+    amf_handle_error_with_timeout("'getway_old' #{id}, #{timestamp}", 'way',id) do
+      if timestamp == ''
+        # undelete
+        old_way = OldWay.find(:first, :conditions => ['visible = ? AND id = ?', true, id], :order => 'version DESC')
+        points = old_way.get_nodes_undelete unless old_way.nil?
+      else
+        begin
+          # revert
+          timestamp = DateTime.strptime(timestamp.to_s, "%d %b %Y, %H:%M:%S")
+          old_way = OldWay.find(:first, :conditions => ['id = ? AND timestamp <= ?', id, timestamp], :order => 'timestamp DESC')
+          unless old_way.nil?
+            points = old_way.get_nodes_revert(timestamp)
+            if !old_way.visible
+              return [-1, "Sorry, the way was deleted at that time - please revert to a previous version.", id]
+            end
           end
+        rescue ArgumentError
+          # thrown by date parsing method. leave old_way as nil for
+          # the error handler below.
         end
-      rescue ArgumentError
-        # thrown by date parsing method. leave old_way as nil for
-        # the error handler below.
       end
-    end
 
-    if old_way.nil?
-      return [-1, "Sorry, the server could not find a way at that time.", id, [], {}, nil, false]
-    else
-      curway=Way.find(id)
-      old_way.tags['history'] = "Retrieved from v#{old_way.version}"
-      return [0, '', id, points, old_way.tags, curway.version, (curway.version==old_way.version and curway.visible)]
+      if old_way.nil?
+        return [-1, "Sorry, the server could not find a way at that time.", id]
+      else
+        curway=Way.find(id)
+        old_way.tags['history'] = "Retrieved from v#{old_way.version}"
+        return [0, '', id, points, old_way.tags, curway.version, (curway.version==old_way.version and curway.visible)]
+      end
     end
   end
   
@@ -374,7 +435,6 @@ class AmfController < ApplicationController
   # start date of the way.
 
   def getway_history(wayid) #:doc:
-
     begin
       # Find list of revision dates for way and all constituent nodes
       revdates=[]
@@ -399,7 +459,8 @@ class AmfController < ApplicationController
       # Remove any elements where 2 seconds doesn't elapse before next one
       revdates.delete_if { |d| revdates.include?(d+1) or revdates.include?(d+2) }
       # Collect all in one nested array
-      revdates.collect! {|d| [d.strftime("%d %b %Y, %H:%M:%S")] + revusers[d.to_i] }
+      revdates.collect! {|d| [d.succ.strftime("%d %b %Y, %H:%M:%S")] + revusers[d.to_i] }
+      revdates.uniq!
 
       return ['way', wayid, revdates]
     rescue ActiveRecord::RecordNotFound
@@ -412,7 +473,7 @@ class AmfController < ApplicationController
   def getnode_history(nodeid) #:doc:
     begin 
       history = Node.find(nodeid).old_nodes.reverse.collect do |old_node|
-        [old_node.timestamp.strftime("%d %b %Y, %H:%M:%S")] + change_user(old_node)
+        [old_node.timestamp.succ.strftime("%d %b %Y, %H:%M:%S")] + change_user(old_node)
       end
       return ['node', nodeid, history]
     rescue ActiveRecord::RecordNotFound
@@ -431,21 +492,24 @@ class AmfController < ApplicationController
   # Returns array listing GPXs, each one comprising id, name and description.
   
   def findgpx(searchterm, usertoken)
-    user = getuser(usertoken)
-    if !uid then return -1,"You must be logged in to search for GPX traces.",[] end
-
-    gpxs = []
-    if searchterm.to_i>0 then
-      gpx = Trace.find(searchterm.to_i, :conditions => ["visible=? AND (public=? OR user_id=?)",true,true,user.id] )
-      if gpx then
-        gpxs.push([gpx.id, gpx.name, gpx.description])
+    amf_handle_error_with_timeout("'findgpx'" ,nil,nil) do
+      user = getuser(usertoken)
+      if !user then return -1,"You must be logged in to search for GPX traces." end
+      unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
+
+      gpxs = []
+      if searchterm.to_i>0 then
+        gpx = Trace.find(searchterm.to_i, :conditions => ["visible=? AND (public=? OR user_id=?)",true,true,user.id] )
+        if gpx then
+          gpxs.push([gpx.id, gpx.name, gpx.description])
+        end
+      else
+        Trace.find(:all, :limit => 21, :conditions => ["visible=? AND (public=? OR user_id=?) AND MATCH(name) AGAINST (?)",true,true,user.id,searchterm] ).each do |gpx|
+          gpxs.push([gpx.id, gpx.name, gpx.description])
+        end
       end
-    else
-      Trace.find(:all, :limit => 21, :conditions => ["visible=? AND (public=? OR user_id=?) AND MATCH(name) AGAINST (?)",true,true,user.id,searchterm] ).each do |gpx|
-      gpxs.push([gpx.id, gpx.name, gpx.description])
-	  end
-	end
-    [0,'',gpxs]
+      [0,'',gpxs]
+    end
   end
 
   # Get a relation with all tags and members.
@@ -458,14 +522,12 @@ class AmfController < ApplicationController
   # 5. version.
   
   def getrelation(relid) #:doc:
-    begin
-      rel = Relation.find(relid)
-    rescue ActiveRecord::RecordNotFound
-      return [-4, 'relation', relid, {}, [], nil]
-    end
+    amf_handle_error("'getrelation' #{relid}" ,'relation',relid) do
+      rel = Relation.find(:first, :conditions => { :id => relid })
 
-    return [-4, 'relation', relid, {}, [], nil] if rel.nil? or !rel.visible
-    [0, '', relid, rel.tags, rel.members, rel.version]
+      return [-4, 'relation', relid] if rel.nil? or !rel.visible
+      [0, '', relid, rel.tags, rel.members, rel.version]
+    end
   end
 
   # Find relations with specified name/id.
@@ -480,11 +542,11 @@ class AmfController < ApplicationController
       end
     else
       RelationTag.find(:all, :limit => 11, :conditions => ["v like ?", "%#{searchterm}%"] ).each do |t|
-      if t.relation.visible then
-	      rels.push([t.relation.id, t.relation.tags, t.relation.members, t.relation.version])
-	    end
-	  end
-	end
+        if t.relation.visible then
+          rels.push([t.relation.id, t.relation.tags, t.relation.members, t.relation.version])
+        end
+      end
+    end
     rels
   end
 
@@ -496,71 +558,66 @@ class AmfController < ApplicationController
   # 3. version.
 
   def putrelation(renumberednodes, renumberedways, usertoken, changeset_id, version, relid, tags, members, visible) #:doc:
-    user = getuser(usertoken)
-    if !user then return -1,"You are not logged in, so the relation could not be saved." end
-
-    relid = relid.to_i
-    visible = (visible.to_i != 0)
-
-    new_relation = nil
-    relation = nil
-    Relation.transaction do
-      # create a new relation, or find the existing one
-      if relid > 0
-        relation = Relation.find(relid)
-      end
-      # We always need a new node, based on the data that has been sent to us
-      new_relation = Relation.new
-
-      # check the members are all positive, and correctly type
-      typedmembers = []
-      members.each do |m|
-        mid = m[1].to_i
-        if mid < 0
-          mid = renumberednodes[mid] if m[0] == 'Node'
-          mid = renumberedways[mid] if m[0] == 'Way'
+    amf_handle_error("'putrelation' #{relid}" ,'relation',relid)  do
+      user = getuser(usertoken)
+      if !user then return -1,"You are not logged in, so the relation could not be saved." end
+      unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
+      if !tags_ok(tags) then return -1,"One of the tags is invalid. Linux users may need to upgrade to Flash Player 10.1." end
+      tags = strip_non_xml_chars tags
+
+      relid = relid.to_i
+      visible = (visible.to_i != 0)
+
+      new_relation = nil
+      relation = nil
+      Relation.transaction do
+        # create a new relation, or find the existing one
+        if relid > 0
+          relation = Relation.find(relid)
         end
-        if mid
-          typedmembers << [m[0], mid, m[2]]
+        # We always need a new node, based on the data that has been sent to us
+        new_relation = Relation.new
+
+        # check the members are all positive, and correctly type
+        typedmembers = []
+        members.each do |m|
+          mid = m[1].to_i
+          if mid < 0
+            mid = renumberednodes[mid] if m[0] == 'Node'
+            mid = renumberedways[mid] if m[0] == 'Way'
+          end
+          if mid
+            typedmembers << [m[0], mid, m[2]]
+          end
         end
-      end
-
-      # assign new contents
-      new_relation.members = typedmembers
-      new_relation.tags = tags
-      new_relation.visible = visible
-      new_relation.changeset_id = changeset_id
-      new_relation.version = version
 
+        # assign new contents
+        new_relation.members = typedmembers
+        new_relation.tags = tags
+        new_relation.visible = visible
+        new_relation.changeset_id = changeset_id
+        new_relation.version = version
+
+        if relid <= 0
+          # We're creating the relation
+          new_relation.create_with_history(user)
+        elsif visible
+          # We're updating the relation
+          new_relation.id = relid
+          relation.update_from(new_relation, user)
+        else
+          # We're deleting the relation
+          new_relation.id = relid
+          relation.delete_with_history!(new_relation, user)
+        end
+      end # transaction
+      
       if relid <= 0
-        # We're creating the relation
-        new_relation.create_with_history(user)
-      elsif visible
-        # We're updating the relation
-        new_relation.id = relid
-        relation.update_from(new_relation, user)
+        return [0, '', relid, new_relation.id, new_relation.version]
       else
-        # We're deleting the relation
-        new_relation.id = relid
-        relation.delete_with_history!(new_relation, user)
+        return [0, '', relid, relid, relation.version]
       end
-    end # transaction
-      
-    if relid <= 0
-      return [0, '', relid, new_relation.id, new_relation.version]
-    else
-      return [0, '', relid, relid, relation.version]
-    end
-  rescue OSM::APIChangesetAlreadyClosedError => ex
-    return [-1, "The changeset #{ex.changeset.id} was closed at #{ex.changeset.closed_at}.", relid, relid, nil]
-  rescue OSM::APIVersionMismatchError => ex
-    a=ex.to_s.match(/(\d+) of (\w+) (\d+)$/)
-    return [-3, ['relation', a[1]], relid, relid, nil]
-  rescue OSM::APIAlreadyDeletedError => ex
-    return [-1, "The relation has already been deleted.", relid, relid, nil]
-  rescue OSM::APIError => ex
-    # Some error that we don't specifically catch
-    return [-2, "An unusual error happened (in 'putrelation' #{relid}). The server said: #{ex}", relid, relid, nil]
+   end
   end
 
   # Save a way to the database, including all nodes. Any nodes in the previous
@@ -579,111 +636,110 @@ class AmfController < ApplicationController
   # 
   # Returns:
   # 0. '0' (code for success),
-  # 1. original way id (unchanged),
-  # 2. new way id,
-  # 3. hash of renumbered nodes (old id=>new id),
-  # 4. way version,
-  # 5. hash of node versions (node=>version)
+  # 1. message,
+  # 2. original way id (unchanged),
+  # 3. new way id,
+  # 4. hash of renumbered nodes (old id=>new id),
+  # 5. way version,
+  # 6. hash of node versions (node=>version)
 
   def putway(renumberednodes, usertoken, changeset_id, wayversion, originalway, pointlist, attributes, nodes, deletednodes) #:doc:
-
-    # -- Initialise
-	
-    user = getuser(usertoken)
-    if !user then return -1,"You are not logged in, so the way could not be saved." end
-    if pointlist.length < 2 then return -2,"Server error - way is only #{points.length} points long." end
-
-    originalway = originalway.to_i
-  	pointlist.collect! {|a| a.to_i }
-
-    way=nil	# this is returned, so scope it outside the transaction
-    nodeversions = {}
-    Way.transaction do
-
-      # -- Update each changed node
-
-      nodes.each do |a|
-        lon = a[0].to_f
-        lat = a[1].to_f
-        id = a[2].to_i
-        version = a[3].to_i
-        if id == 0  then return -2,"Server error - node with id 0 found in way #{originalway}." end
-        if lat== 90 then return -2,"Server error - node with latitude -90 found in way #{originalway}." end
-        if renumberednodes[id] then id = renumberednodes[id] end
-
-        node = Node.new
-        node.changeset_id = changeset_id
-        node.lat = lat
-        node.lon = lon
-        node.tags = a[4]
-        node.tags.delete('created_by')
-        node.version = version
-        if id <= 0
-          # We're creating the node
-          node.create_with_history(user)
-          renumberednodes[id] = node.id
-          nodeversions[node.id] = node.version
-        else
-          # We're updating an existing node
-          previous=Node.find(id)
-          node.id=id
-          previous.update_from(node, user)
-          nodeversions[previous.id] = previous.version
+    amf_handle_error("'putway' #{originalway}" ,'way',originalway) do
+      # -- Initialise
+  
+      user = getuser(usertoken)
+      if !user then return -1,"You are not logged in, so the way could not be saved." end
+      unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
+      if pointlist.length < 2 then return -2,"Server error - way is only #{points.length} points long." end
+      if !tags_ok(attributes) then return -1,"One of the tags is invalid. Linux users may need to upgrade to Flash Player 10.1." end
+      attributes = strip_non_xml_chars attributes
+
+      originalway = originalway.to_i
+      pointlist.collect! {|a| a.to_i }
+
+      way=nil # this is returned, so scope it outside the transaction
+      nodeversions = {}
+      Way.transaction do
+
+        # -- Update each changed node
+
+        nodes.each do |a|
+          lon = a[0].to_f
+          lat = a[1].to_f
+          id = a[2].to_i
+          version = a[3].to_i
+
+          if id == 0  then return -2,"Server error - node with id 0 found in way #{originalway}." end
+          if lat== 90 then return -2,"Server error - node with latitude -90 found in way #{originalway}." end
+          if renumberednodes[id] then id = renumberednodes[id] end
+
+          node = Node.new
+          node.changeset_id = changeset_id
+          node.lat = lat
+          node.lon = lon
+          node.tags = a[4]
+
+          # fixup node tags in a way as well
+          if !tags_ok(node.tags) then return -1,"One of the tags is invalid. Linux users may need to upgrade to Flash Player 10.1." end
+          node.tags = strip_non_xml_chars node.tags
+
+          node.tags.delete('created_by')
+          node.version = version
+          if id <= 0
+            # We're creating the node
+            node.create_with_history(user)
+            renumberednodes[id] = node.id
+            nodeversions[node.id] = node.version
+          else
+            # We're updating an existing node
+            previous=Node.find(id)
+            node.id=id
+            previous.update_from(node, user)
+            nodeversions[previous.id] = previous.version
+          end
         end
-      end
 
-      # -- Save revised way
-
-  	  pointlist.collect! {|a|
-	      renumberednodes[a] ? renumberednodes[a]:a
-  	  } # renumber nodes
-      new_way = Way.new
-      new_way.tags = attributes
-      new_way.nds = pointlist
-      new_way.changeset_id = changeset_id
-      new_way.version = wayversion
-      if originalway <= 0
-        new_way.create_with_history(user)
-        way=new_way	# so we can get way.id and way.version
-      else
-	      way = Way.find(originalway)
-   		  if way.tags!=attributes or way.nds!=pointlist or !way.visible?
-   		    new_way.id=originalway
+        # -- Save revised way
+
+        pointlist.collect! {|a|
+          renumberednodes[a] ? renumberednodes[a]:a
+        } # renumber nodes
+        new_way = Way.new
+        new_way.tags = attributes
+        new_way.nds = pointlist
+        new_way.changeset_id = changeset_id
+        new_way.version = wayversion
+        if originalway <= 0
+          new_way.create_with_history(user)
+          way=new_way # so we can get way.id and way.version
+        else
+          way = Way.find(originalway)
+          if way.tags!=attributes or way.nds!=pointlist or !way.visible?
+            new_way.id=originalway
           way.update_from(new_way, user)
+          end
         end
-      end
 
-      # -- Delete unwanted nodes
-
-      deletednodes.each do |id,v|
-        node = Node.find(id.to_i)
-        new_node = Node.new
-        new_node.changeset_id = changeset_id
-        new_node.version = v.to_i
-        new_node.id = id.to_i
-        begin
-          node.delete_with_history!(new_node, user)
-        rescue OSM::APIPreconditionFailedError => ex
-          # We don't do anything here as the node is being used elsewhere
-          # and we don't want to delete it
+        # -- Delete unwanted nodes
+
+        deletednodes.each do |id,v|
+          node = Node.find(id.to_i)
+          new_node = Node.new
+          new_node.changeset_id = changeset_id
+          new_node.version = v.to_i
+          new_node.id = id.to_i
+          begin
+            node.delete_with_history!(new_node, user)
+          rescue OSM::APIPreconditionFailedError => ex
+            # We don't do anything here as the node is being used elsewhere
+            # and we don't want to delete it
+          end
         end
-      end
 
-    end # transaction
+      end # transaction
 
-    [0, '', originalway, way.id, renumberednodes, way.version, nodeversions, deletednodes]
-  rescue OSM::APIChangesetAlreadyClosedError => ex
-    return [-1, "Sorry, your changeset #{ex.changeset.id} was closed (at #{ex.changeset.closed_at}).", originalway, originalway, renumberednodes, wayversion, nodeversions, deletednodes]
-  rescue OSM::APIVersionMismatchError => ex
-    a=ex.to_s.match(/(\d+) of (\w+) (\d+)$/)
-    return [-3, ['way', a[1], a[2].downcase, a[3]], originalway, originalway, renumberednodes, wayversion, nodeversions, deletednodes]
-  rescue OSM::APITooManyWayNodesError => ex
-    return [-1, "You have tried to upload a really long way with #{ex.provided} points: only #{ex.max} are allowed.", originalway, originalway, renumberednodes, wayversion, nodeversions, deletednodes]
-  rescue OSM::APIAlreadyDeletedError => ex
-    return [-1, "The point has already been deleted.", originalway, originalway, renumberednodes, wayversion, nodeversions, deletednodes]
-  rescue OSM::APIError => ex
-    # Some error that we don't specifically catch
-    return [-2, "An unusual error happened (in 'putway' #{originalway}). The server said: #{ex}", originalway, originalway, renumberednodes, wayversion, nodeversions, deletednodes]
+      [0, '', originalway, way.id, renumberednodes, way.version, nodeversions, deletednodes]
+    end
   end
 
   # Save POI to the database.
@@ -696,59 +752,54 @@ class AmfController < ApplicationController
   # 4. version.
 
   def putpoi(usertoken, changeset_id, version, id, lon, lat, tags, visible) #:doc:
-    user = getuser(usertoken)
-    if !user then return -1,"You are not logged in, so the point could not be saved." end
-
-    id = id.to_i
-    visible = (visible.to_i == 1)
-    node = nil
-    new_node = nil
-    Node.transaction do
-      if id > 0 then
-        node = Node.find(id)
-
-        if !visible then
-          unless node.ways.empty? then return -1,"The point has since become part of a way, so you cannot save it as a POI.",id,id,version end
+    amf_handle_error("'putpoi' #{id}", 'node',id) do
+      user = getuser(usertoken)
+      if !user then return -1,"You are not logged in, so the point could not be saved." end
+      unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
+      if !tags_ok(tags) then return -1,"One of the tags is invalid. Linux users may need to upgrade to Flash Player 10.1." end
+      tags = strip_non_xml_chars tags
+
+      id = id.to_i
+      visible = (visible.to_i == 1)
+      node = nil
+      new_node = nil
+      Node.transaction do
+        if id > 0 then
+          node = Node.find(id)
+
+          if !visible then
+            unless node.ways.empty? then return -1,"Point #{id} has since become part of a way, so you cannot save it as a POI.",id,id,version end
+          end
         end
-      end
-      # We always need a new node, based on the data that has been sent to us
-      new_node = Node.new
-
-      new_node.changeset_id = changeset_id
-      new_node.version = version
-      new_node.lat = lat
-      new_node.lon = lon
-      new_node.tags = tags
-      if id <= 0 
-        # We're creating the node
-        new_node.create_with_history(user)
-      elsif visible
-        # We're updating the node
-        new_node.id=id
-        node.update_from(new_node, user)
-      else
-        # We're deleting the node
-        new_node.id=id
-        node.delete_with_history!(new_node, user)
-      end
+        # We always need a new node, based on the data that has been sent to us
+        new_node = Node.new
 
-    end # transaction
+        new_node.changeset_id = changeset_id
+        new_node.version = version
+        new_node.lat = lat
+        new_node.lon = lon
+        new_node.tags = tags
+        if id <= 0 
+          # We're creating the node
+          new_node.create_with_history(user)
+        elsif visible
+          # We're updating the node
+          new_node.id=id
+          node.update_from(new_node, user)
+        else
+          # We're deleting the node
+          new_node.id=id
+          node.delete_with_history!(new_node, user)
+        end
 
-    if id <= 0
-      return [0, '', id, new_node.id, new_node.version]
-    else
-      return [0, '', id, node.id, node.version]
-    end 
-  rescue OSM::APIChangesetAlreadyClosedError => ex
-    return [-1, "The changeset #{ex.changeset.id} was closed at #{ex.changeset.closed_at}",id,id,version]
-  rescue OSM::APIVersionMismatchError => ex
-    a=ex.to_s.match(/(\d+) of (\w+) (\d+)$/)
-    return [-3, ['node', a[1]], id,id,version]
-  rescue OSM::APIAlreadyDeletedError => ex
-    return [-1, "The point has already been deleted",id,id,version]
-  rescue OSM::APIError => ex
-    # Some error that we don't specifically catch
-    return [-2, "An unusual error happened (in 'putpoi' #{id}). The server said: #{ex}",id,id,version]
+      end # transaction
+
+      if id <= 0
+        return [0, '', id, new_node.id, new_node.version]
+      else
+        return [0, '', id, node.id, node.version]
+      end 
+    end
   end
 
   # Read POI from database
@@ -757,16 +808,19 @@ class AmfController < ApplicationController
   # Returns array of id, long, lat, hash of tags, (current) version.
 
   def getpoi(id,timestamp) #:doc:
-    n = Node.find(id)
-    v = n.version
-    unless timestamp == ''
-      n = OldNode.find(id, :conditions=>['timestamp=?',DateTime.strptime(timestamp, "%d %b %Y, %H:%M:%S")])
-    end
+    amf_handle_error("'getpoi' #{id}" ,'node',id) do
+      id = id.to_i
+      n = Node.find(id)
+      v = n.version
+      unless timestamp == ''
+        n = OldNode.find(:first, :conditions => ['id = ? AND timestamp <= ?', id, timestamp], :order => 'timestamp DESC')
+      end
 
-    if n
-      return [0, '', n.id, n.lon, n.lat, n.tags, v]
-    else
-      return [-4, 'node', id, nil, nil, {}, nil]
+      if n
+        return [0, '', n.id, n.lon, n.lat, n.tags, v]
+      else
+        return [-4, 'node', id]
+      end
     end
   end
 
@@ -781,53 +835,46 @@ class AmfController < ApplicationController
   # Returns 0 (success), unchanged way id, new way version, new node versions.
 
   def deleteway(usertoken, changeset_id, way_id, way_version, deletednodes) #:doc:
-    user = getuser(usertoken)
-    unless user then return -1,"You are not logged in, so the way could not be deleted." end
+    amf_handle_error("'deleteway' #{way_id}" ,'way', way_id) do
+      user = getuser(usertoken)
+      unless user then return -1,"You are not logged in, so the way could not be deleted." end
+      unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
       
-    way_id = way_id.to_i
-    nodeversions = {}
-    old_way=nil # returned, so scope it outside the transaction
-    # Need a transaction so that if one item fails to delete, the whole delete fails.
-    Way.transaction do
-
-      # -- Delete the way
-
-      old_way = Way.find(way_id)
-      delete_way = Way.new
-      delete_way.version = way_version
-      delete_way.changeset_id = changeset_id
-      delete_way.id = way_id
-      old_way.delete_with_history!(delete_way, user)
-
-      # -- Delete unwanted nodes
-
-      deletednodes.each do |id,v|
-        node = Node.find(id.to_i)
-        new_node = Node.new
-        new_node.changeset_id = changeset_id
-        new_node.version = v.to_i
-        new_node.id = id.to_i
-        begin
-          node.delete_with_history!(new_node, user)
-          nodeversions[node.id]=node.version
-        rescue OSM::APIPreconditionFailedError => ex
-          # We don't do anything with the exception as the node is in use
-          # elsewhere and we don't want to delete it
+      way_id = way_id.to_i
+      nodeversions = {}
+      old_way=nil # returned, so scope it outside the transaction
+      # Need a transaction so that if one item fails to delete, the whole delete fails.
+      Way.transaction do
+
+        # -- Delete the way
+
+        old_way = Way.find(way_id)
+        delete_way = Way.new
+        delete_way.version = way_version
+        delete_way.changeset_id = changeset_id
+        delete_way.id = way_id
+        old_way.delete_with_history!(delete_way, user)
+
+        # -- Delete unwanted nodes
+
+        deletednodes.each do |id,v|
+          node = Node.find(id.to_i)
+          new_node = Node.new
+          new_node.changeset_id = changeset_id
+          new_node.version = v.to_i
+          new_node.id = id.to_i
+          begin
+            node.delete_with_history!(new_node, user)
+            nodeversions[node.id]=node.version
+          rescue OSM::APIPreconditionFailedError => ex
+            # We don't do anything with the exception as the node is in use
+            # elsewhere and we don't want to delete it
+          end
         end
-      end
 
-    end # transaction
-    [0, '', way_id, old_way.version, nodeversions]
-  rescue OSM::APIChangesetAlreadyClosedError => ex
-    return [-1, "The changeset #{ex.changeset.id} was closed at #{ex.changeset.closed_at}",way_id,way_version,nodeversions]
-  rescue OSM::APIVersionMismatchError => ex
-    a=ex.to_s.match(/(\d+) of (\w+) (\d+)$/)
-    return [-3, ['way', a[1]],way_id,way_version,nodeversions]
-  rescue OSM::APIAlreadyDeletedError => ex
-    return [-1, "The way has already been deleted.",way_id,way_version,nodeversions]
-  rescue OSM::APIError => ex
-    # Some error that we don't specifically catch
-    return [-2, "An unusual error happened (in 'deleteway' #{way_id}). The server said: #{ex}",way_id,way_version,nodeversions]
+      end # transaction
+      [0, '', way_id, old_way.version, nodeversions]
+    end
   end
 
 
@@ -848,21 +895,34 @@ class AmfController < ApplicationController
     return user
   end
 
-  # Send AMF response
+  def getlocales
+    Dir.glob("#{RAILS_ROOT}/config/potlatch/locales/*").collect { |f| File.basename(f, ".yml") }
+  end
   
-  def sendresponse(results)
-    a,b=results.length.divmod(256)
-    render :content_type => "application/x-amf", :text => proc { |response, output| 
-      # ** move amf writing loop into here - 
-      # basically we read the messages in first (into an array of some sort),
-      # then iterate through that array within here, and do all the AMF writing
-      output.write 0.chr+0.chr+0.chr+0.chr+a.chr+b.chr
-      results.each do |k,v|
-        output.write(v)
-      end
-    }
+  ##
+  # check that all key-value pairs are valid UTF-8.
+  def tags_ok(tags)
+    tags.each do |k, v|
+      return false unless UTF8.valid? k
+      return false unless UTF8.valid? v
+    end
+    return true
   end
 
+  ##
+  # strip characters which are invalid in XML documents from the strings
+  # in the +tags+ hash.
+  def strip_non_xml_chars(tags)
+    new_tags = Hash.new
+    unless tags.nil?
+      tags.each do |k, v|
+        new_k = k.delete "\000-\037", "^\011\012\015"
+        new_v = v.delete "\000-\037", "^\011\012\015"
+        new_tags[new_k] = new_v
+      end
+    end
+    return new_tags
+  end
 
   # ====================================================================
   # Alternative SQL queries for getway/whichways
@@ -879,16 +939,16 @@ class AmfController < ApplicationController
     EOF
     return ActiveRecord::Base.connection.select_all(sql).collect { |a| [a['wayid'].to_i,a['version'].to_i] }
   end
-	
+  
   def sql_find_pois_in_area(xmin,ymin,xmax,ymax)
     pois=[]
     sql=<<-EOF
-		  SELECT current_nodes.id,current_nodes.latitude*0.0000001 AS lat,current_nodes.longitude*0.0000001 AS lon,current_nodes.version 
-			FROM current_nodes 
+      SELECT current_nodes.id,current_nodes.latitude*0.0000001 AS lat,current_nodes.longitude*0.0000001 AS lon,current_nodes.version 
+      FROM current_nodes 
        LEFT OUTER JOIN current_way_nodes cwn ON cwn.node_id=current_nodes.id 
-		   WHERE current_nodes.visible=TRUE
-			 AND cwn.id IS NULL
-			 AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")}
+       WHERE current_nodes.visible=TRUE
+       AND cwn.id IS NULL
+       AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")}
     EOF
     ActiveRecord::Base.connection.select_all(sql).each do |row|
       poitags={}
@@ -899,7 +959,7 @@ class AmfController < ApplicationController
     end
     pois
   end
-	
+  
   def sql_find_relations_in_area_and_ways(xmin,ymin,xmax,ymax,way_ids)
     # ** It would be more Potlatchy to get relations for nodes within ways
     #    during 'getway', not here
@@ -922,17 +982,17 @@ class AmfController < ApplicationController
     end
     ActiveRecord::Base.connection.select_all(sql).collect { |a| [a['relid'].to_i,a['version'].to_i] }
   end
-	
+  
   def sql_get_nodes_in_way(wayid)
     points=[]
     sql=<<-EOF
       SELECT latitude*0.0000001 AS lat,longitude*0.0000001 AS lon,current_nodes.id,current_nodes.version 
       FROM current_way_nodes,current_nodes 
        WHERE current_way_nodes.id=#{wayid.to_i} 
-		   AND current_way_nodes.node_id=current_nodes.id 
-		   AND current_nodes.visible=TRUE
+       AND current_way_nodes.node_id=current_nodes.id 
+       AND current_nodes.visible=TRUE
       ORDER BY sequence_id
-	  EOF
+    EOF
     ActiveRecord::Base.connection.select_all(sql).each do |row|
       nodetags={}
       ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_node_tags WHERE id=#{row['id']}").each do |n|
@@ -943,7 +1003,7 @@ class AmfController < ApplicationController
     end
     points
   end
-	
+  
   def sql_get_tags_in_way(wayid)
     tags={}
     ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_way_tags WHERE id=#{wayid.to_i}").each do |row|
@@ -953,7 +1013,11 @@ class AmfController < ApplicationController
   end
 
   def sql_get_way_version(wayid)
-    ActiveRecord::Base.connection.select_one("SELECT version FROM current_ways WHERE id=#{wayid.to_i}")
+    ActiveRecord::Base.connection.select_one("SELECT version FROM current_ways WHERE id=#{wayid.to_i}")['version']
+  end
+
+  def sql_get_way_user(wayid)
+    ActiveRecord::Base.connection.select_one("SELECT user FROM current_ways,changesets WHERE current_ways.id=#{wayid.to_i} AND current_ways.changeset=changesets.id")['user']
   end
 end