class ChangesetController < ApplicationController
require 'xml/libxml'
+ require 'diff_reader'
before_filter :authorize, :only => [:create, :update, :delete, :upload]
before_filter :check_write_availability, :only => [:create, :update, :delete, :upload]
def close
begin
- if not request.put?
+ unless request.put?
render :nothing => true, :status => :method_not_allowed
return
end
changeset = Changeset.find(params[:id])
changeset.open = false
- changeset.save
+ changeset.save!
render :nothing => true
rescue ActiveRecord::RecordNotFound
render :nothing => true, :status => :not_found
end
end
+ ##
+ # Upload a diff in a single transaction.
+ #
+ # This means that each change within the diff must succeed, i.e: that
+ # each version number mentioned is still current. Otherwise the entire
+ # transaction *must* be rolled back.
+ #
+ # Furthermore, each element in the diff can only reference the current
+ # changeset.
+ #
+ # Returns: ??? the new document? updated diffs?
def upload
- if not request.put?
+ # only allow POST requests, as the upload method is most definitely
+ # not idempotent, as several uploads with placeholder IDs will have
+ # different side-effects.
+ # see http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.1.2
+ unless request.post?
render :nothing => true, :status => :method_not_allowed
return
end
- # FIXME: this should really be done without loading the whole XML file
- # into memory.
- p = XML::Parser.new
- p.string = request.raw_post
- doc = p.parse
-
- node_ids, way_ids, rel_ids = {}, {}, {}
- ids = {"node"=>node_ids, "way"=>way_ids, "relation"=>rel_ids}
-
- res = XML::Document.new
- res.encoding = 'UTF-8'
- root = XML::Node.new 'osm'
- root['version'] = '0.6'
- root['creator'] = 'OpenStreetMap.org'
- res.root = root
-
- root << XML::Node.new_comment(" Warning: this is a 0.6 result document, " +
- "not a normal OSM file. ")
-
+ changeset = Changeset.find(params[:id])
+
+ diff_reader = DiffReader.new(request.raw_post, changeset)
Changeset.transaction do
- doc.find('//osm/create/node').each do |nd|
- elem = XML::Node.new 'node'
- node = Node.from_xml_node(nd, true)
- elem['old_id'] = nd['id']
- create_prim node_ids, node, nd
- elem['new_id'] = node.id.to_s
- elem['new_version'] = node.version.to_s
- root << elem
- end
- doc.find('//osm/create/way').each do |nd|
- elem = XML::Node.new 'way'
- way = Way.from_xml_node(nd, true)
- elem['old_id'] = nd['id']
- fix_way(way, node_ids)
- raise OSM::APIPreconditionFailedError.new if !way.preconditions_ok?
- create_prim way_ids, way, nd
- elem['new_id'] = way.id.to_s
- elem['new_version'] = way.version.to_s
- root << elem
- end
- doc.find('//osm/create/relation').each do |nd|
- elem = XML::Node.new 'relation'
- relation = Relation.from_xml_node(nd, true)
- elem['old_id'] = nd['id']
- fix_rel(relation, ids)
- raise OSM::APIPreconditionFailedError.new if !relation.preconditions_ok?
- create_prim rel_ids, relation, nd
- elem['new_id'] = relation.id.to_s
- elem['new_version'] = relation.version.to_s
- root << elem
- end
-
- doc.find('//osm/modify/relation').each do |nd|
- elem = XML::Node.new 'relation'
- new_relation = Relation.from_xml_node(nd)
- relation = Relation.find(new_relation.id)
- relation.update_from new_relation, @user
- elem['old_id'] = elem['new_id'] = relation.id.to_s
- elem['new_version'] = relation.version.to_s
- root << elem
- end
- doc.find('//osm/modify/way').each do |nd|
- elem = XML::Node.new 'way'
- new_way = Way.from_xml_node(nd)
- way = Way.find(new_way.id)
- way.update_from new_way, @user
- elem['old_id'] = elem['new_id'] = way.id.to_s
- elem['new_version'] = way.version.to_s
- root << elem
- end
- doc.find('//osm/modify/node').each do |nd|
- elem = XML::Node.new 'node'
- new_node = Node.from_xml_node(nd)
- node = Node.find(new_node.id)
- node.update_from new_node, @user
- elem['old_id'] = elem['new_id'] = node.id.to_s
- elem['new_version'] = node.version.to_s
- root << elem
- end
-
- doc.find('//osm/delete/relation').each do |nd|
- elem = XML::Node.new 'relation'
- relation = Relation.find(nd['id'])
- relation.delete_with_history(@user)
- elem['old_id'] = elem['new_id'] = relation.id.to_s
- elem['new_version'] = relation.version.to_s
- root << elem
- end
- doc.find('//osm/delete/way').each do |nd|
- elem = XML::Node.new 'way'
- way = Way.find(nd['id'])
- way.delete_with_history(@user)
- elem['old_id'] = elem['new_id'] = way.id.to_s
- elem['new_version'] = way.version.to_s
- root << elem
- end
- doc.find('//osm/delete/node').each do |nd|
- elem = XML::Node.new 'node'
- new_node = Node.from_xml_node(nd)
- node = Node.find(nd['id'])
- node.delete_with_history(@user)
- elem['old_id'] = elem['new_id'] = node.id.to_s
- elem['new_version'] = node.version.to_s
- root << elem
- end
+ result = diff_reader.commit
+ render :text => result.to_s, :content_type => "text/xml"
end
-
- render :text => res.to_s, :content_type => "text/xml"
+
+ rescue ActiveRecord::RecordNotFound
+ render :nothing => true, :status => :not_found
+ rescue OSM::APIError => ex
+ render ex.render_opts
end
end
projects / rails.git / blobdiff