4 class NodesControllerTest < ActionDispatch::IntegrationTest
6 # test all routes which lead to this controller
9 { :path => "/api/0.6/nodes", :method => :get },
10 { :controller => "api/nodes", :action => "index" }
13 { :path => "/api/0.6/nodes.json", :method => :get },
14 { :controller => "api/nodes", :action => "index", :format => "json" }
17 { :path => "/api/0.6/nodes", :method => :post },
18 { :controller => "api/nodes", :action => "create" }
21 { :path => "/api/0.6/node/1", :method => :get },
22 { :controller => "api/nodes", :action => "show", :id => "1" }
25 { :path => "/api/0.6/node/1.json", :method => :get },
26 { :controller => "api/nodes", :action => "show", :id => "1", :format => "json" }
29 { :path => "/api/0.6/node/1", :method => :put },
30 { :controller => "api/nodes", :action => "update", :id => "1" }
33 { :path => "/api/0.6/node/1", :method => :delete },
34 { :controller => "api/nodes", :action => "destroy", :id => "1" }
38 { :controller => "api/nodes", :action => "create" },
39 { :path => "/api/0.6/node/create", :method => :put }
44 # test fetching multiple nodes
47 node2 = create(:node, :deleted)
49 node4 = create(:node, :with_history, :version => 2)
50 node5 = create(:node, :deleted, :with_history, :version => 2)
52 # check error when no parameter provided
54 assert_response :bad_request
56 # check error when no parameter value provided
57 get api_nodes_path(:nodes => "")
58 assert_response :bad_request
61 get api_nodes_path(:nodes => "#{node1.id},#{node2.id},#{node3.id},#{node4.id},#{node5.id}")
62 assert_response :success
63 assert_select "osm" do
64 assert_select "node", :count => 5
65 assert_select "node[id='#{node1.id}'][visible='true']", :count => 1
66 assert_select "node[id='#{node2.id}'][visible='false']", :count => 1
67 assert_select "node[id='#{node3.id}'][visible='true']", :count => 1
68 assert_select "node[id='#{node4.id}'][visible='true']", :count => 1
69 assert_select "node[id='#{node5.id}'][visible='false']", :count => 1
72 # test a working call with json format
73 get api_nodes_path(:nodes => "#{node1.id},#{node2.id},#{node3.id},#{node4.id},#{node5.id}", :format => "json")
75 js = ActiveSupport::JSON.decode(@response.body)
77 assert_equal 5, js["elements"].count
78 assert_equal 5, (js["elements"].count { |a| a["type"] == "node" })
79 assert_equal 1, (js["elements"].count { |a| a["id"] == node1.id && a["visible"].nil? })
80 assert_equal 1, (js["elements"].count { |a| a["id"] == node2.id && a["visible"] == false })
81 assert_equal 1, (js["elements"].count { |a| a["id"] == node3.id && a["visible"].nil? })
82 assert_equal 1, (js["elements"].count { |a| a["id"] == node4.id && a["visible"].nil? })
83 assert_equal 1, (js["elements"].count { |a| a["id"] == node5.id && a["visible"] == false })
85 # check error when a non-existent node is included
86 get api_nodes_path(:nodes => "#{node1.id},#{node2.id},#{node3.id},#{node4.id},#{node5.id},0")
87 assert_response :not_found
91 private_user = create(:user, :data_public => false)
92 private_changeset = create(:changeset, :user => private_user)
94 changeset = create(:changeset, :user => user)
96 # create a node with random lat/lon
97 lat = rand(-50..50) + rand
98 lon = rand(-50..50) + rand
100 ## First try with no auth
101 # create a minimal xml file
102 xml = "<osm><node lat='#{lat}' lon='#{lon}' changeset='#{changeset.id}'/></osm>"
103 assert_difference("OldNode.count", 0) do
104 post api_nodes_path, :params => xml
106 # hope for unauthorized
107 assert_response :unauthorized, "node upload did not return unauthorized status"
109 ## Now try with the user which doesn't have their data public
110 auth_header = bearer_authorization_header private_user
112 # create a minimal xml file
113 xml = "<osm><node lat='#{lat}' lon='#{lon}' changeset='#{private_changeset.id}'/></osm>"
114 assert_difference("Node.count", 0) do
115 post api_nodes_path, :params => xml, :headers => auth_header
118 assert_require_public_data "node create did not return forbidden status"
120 ## Now try with the user that has the public data
121 auth_header = bearer_authorization_header user
123 # create a minimal xml file
124 xml = "<osm><node lat='#{lat}' lon='#{lon}' changeset='#{changeset.id}'/></osm>"
125 post api_nodes_path, :params => xml, :headers => auth_header
127 assert_response :success, "node upload did not return success status"
129 # read id of created node and search for it
130 nodeid = @response.body
131 checknode = Node.find(nodeid)
132 assert_not_nil checknode, "uploaded node not found in data base after upload"
134 assert_in_delta lat * 10000000, checknode.latitude, 1, "saved node does not match requested latitude"
135 assert_in_delta lon * 10000000, checknode.longitude, 1, "saved node does not match requested longitude"
136 assert_equal changeset.id, checknode.changeset_id, "saved node does not belong to changeset that it was created in"
137 assert checknode.visible, "saved node is not visible"
140 def test_create_invalid_xml
141 ## Only test public user here, as test_create should cover what's the forbidden
142 ## that would occur here
145 changeset = create(:changeset, :user => user)
147 auth_header = bearer_authorization_header user
151 # test that the upload is rejected when xml is valid, but osm doc isn't
153 post api_nodes_path, :params => xml, :headers => auth_header
154 assert_response :bad_request, "node upload did not return bad_request status"
155 assert_equal "Cannot parse valid node from xml string <create/>. XML doesn't contain an osm/node element.", @response.body
157 # test that the upload is rejected when no lat is supplied
158 # create a minimal xml file
159 xml = "<osm><node lon='#{lon}' changeset='#{changeset.id}'/></osm>"
160 post api_nodes_path, :params => xml, :headers => auth_header
162 assert_response :bad_request, "node upload did not return bad_request status"
163 assert_equal "Cannot parse valid node from xml string <node lon=\"3.23\" changeset=\"#{changeset.id}\"/>. lat missing", @response.body
165 # test that the upload is rejected when no lon is supplied
166 # create a minimal xml file
167 xml = "<osm><node lat='#{lat}' changeset='#{changeset.id}'/></osm>"
168 post api_nodes_path, :params => xml, :headers => auth_header
170 assert_response :bad_request, "node upload did not return bad_request status"
171 assert_equal "Cannot parse valid node from xml string <node lat=\"3.434\" changeset=\"#{changeset.id}\"/>. lon missing", @response.body
173 # test that the upload is rejected when lat is non-numeric
174 # create a minimal xml file
175 xml = "<osm><node lat='abc' lon='#{lon}' changeset='#{changeset.id}'/></osm>"
176 post api_nodes_path, :params => xml, :headers => auth_header
178 assert_response :bad_request, "node upload did not return bad_request status"
179 assert_equal "Cannot parse valid node from xml string <node lat=\"abc\" lon=\"#{lon}\" changeset=\"#{changeset.id}\"/>. lat not a number", @response.body
181 # test that the upload is rejected when lon is non-numeric
182 # create a minimal xml file
183 xml = "<osm><node lat='#{lat}' lon='abc' changeset='#{changeset.id}'/></osm>"
184 post api_nodes_path, :params => xml, :headers => auth_header
186 assert_response :bad_request, "node upload did not return bad_request status"
187 assert_equal "Cannot parse valid node from xml string <node lat=\"#{lat}\" lon=\"abc\" changeset=\"#{changeset.id}\"/>. lon not a number", @response.body
189 # test that the upload is rejected when we have a tag which is too long
190 xml = "<osm><node lat='#{lat}' lon='#{lon}' changeset='#{changeset.id}'><tag k='foo' v='#{'x' * 256}'/></node></osm>"
191 post api_nodes_path, :params => xml, :headers => auth_header
192 assert_response :bad_request, "node upload did not return bad_request status"
193 assert_match(/ v: is too long \(maximum is 255 characters\) /, @response.body)
196 def test_show_not_found
198 assert_response :not_found
201 def test_show_deleted
202 get api_node_path(create(:node, :deleted))
203 assert_response :gone
207 node = create(:node, :timestamp => "2021-02-03T00:00:00Z")
209 get api_node_path(node)
211 assert_response :success
212 assert_not_nil @response.header["Last-Modified"]
213 assert_equal "2021-02-03T00:00:00Z", Time.parse(@response.header["Last-Modified"]).utc.xmlschema
216 # Ensure the lat/lon is formatted as a decimal e.g. not 4.0e-05
217 def test_lat_lon_xml_format
218 node = create(:node, :latitude => (0.00004 * OldNode::SCALE).to_i, :longitude => (0.00008 * OldNode::SCALE).to_i)
220 get api_node_path(node)
221 assert_match(/lat="0.0000400"/, response.body)
222 assert_match(/lon="0.0000800"/, response.body)
225 # this tests deletion restrictions - basic deletion is tested in the unit
228 private_user = create(:user, :data_public => false)
229 private_user_changeset = create(:changeset, :user => private_user)
230 private_user_closed_changeset = create(:changeset, :closed, :user => private_user)
231 private_node = create(:node, :changeset => private_user_changeset)
232 private_deleted_node = create(:node, :deleted, :changeset => private_user_changeset)
234 ## first try to delete node without auth
235 delete api_node_path(private_node)
236 assert_response :unauthorized
238 ## now set auth for the non-data public user
239 auth_header = bearer_authorization_header private_user
241 # try to delete with an invalid (closed) changeset
242 xml = update_changeset(xml_for_node(private_node), private_user_closed_changeset.id)
243 delete api_node_path(private_node), :params => xml.to_s, :headers => auth_header
244 assert_require_public_data("non-public user shouldn't be able to delete node")
246 # try to delete with an invalid (non-existent) changeset
247 xml = update_changeset(xml_for_node(private_node), 0)
248 delete api_node_path(private_node), :params => xml.to_s, :headers => auth_header
249 assert_require_public_data("shouldn't be able to delete node, when user's data is private")
251 # valid delete now takes a payload
252 xml = xml_for_node(private_node)
253 delete api_node_path(private_node), :params => xml.to_s, :headers => auth_header
254 assert_require_public_data("shouldn't be able to delete node when user's data isn't public'")
256 # this won't work since the node is already deleted
257 xml = xml_for_node(private_deleted_node)
258 delete api_node_path(private_deleted_node), :params => xml.to_s, :headers => auth_header
259 assert_require_public_data
261 # this won't work since the node never existed
262 delete api_node_path(0), :headers => auth_header
263 assert_require_public_data
265 ## these test whether nodes which are in-use can be deleted:
267 private_used_node = create(:node, :changeset => private_user_changeset)
268 create(:way_node, :node => private_used_node)
270 xml = xml_for_node(private_used_node)
271 delete api_node_path(private_used_node), :params => xml.to_s, :headers => auth_header
272 assert_require_public_data "shouldn't be able to delete a node used in a way (#{@response.body})"
275 private_used_node2 = create(:node, :changeset => private_user_changeset)
276 create(:relation_member, :member => private_used_node2)
278 xml = xml_for_node(private_used_node2)
279 delete api_node_path(private_used_node2), :params => xml.to_s, :headers => auth_header
280 assert_require_public_data "shouldn't be able to delete a node used in a relation (#{@response.body})"
282 ## now setup for the public data user
283 user = create(:user, :data_public => true)
284 changeset = create(:changeset, :user => user)
285 closed_changeset = create(:changeset, :closed, :user => user)
286 node = create(:node, :changeset => changeset)
287 auth_header = bearer_authorization_header user
289 # try to delete with an invalid (closed) changeset
290 xml = update_changeset(xml_for_node(node), closed_changeset.id)
291 delete api_node_path(node), :params => xml.to_s, :headers => auth_header
292 assert_response :conflict
294 # try to delete with an invalid (non-existent) changeset
295 xml = update_changeset(xml_for_node(node), 0)
296 delete api_node_path(node), :params => xml.to_s, :headers => auth_header
297 assert_response :conflict
299 # try to delete a node with a different ID
300 other_node = create(:node)
301 xml = xml_for_node(other_node)
302 delete api_node_path(node), :params => xml.to_s, :headers => auth_header
303 assert_response :bad_request,
304 "should not be able to delete a node with a different ID from the XML"
306 # try to delete a node rubbish in the payloads
308 delete api_node_path(node), :params => xml.to_s, :headers => auth_header
309 assert_response :bad_request,
310 "should not be able to delete a node without a valid XML payload"
312 # valid delete now takes a payload
313 xml = xml_for_node(node)
314 delete api_node_path(node), :params => xml.to_s, :headers => auth_header
315 assert_response :success
317 # valid delete should return the new version number, which should
318 # be greater than the old version number
319 assert_operator @response.body.to_i, :>, node.version, "delete request should return a new version number for node"
321 # deleting the same node twice doesn't work
322 xml = xml_for_node(node)
323 delete api_node_path(node), :params => xml.to_s, :headers => auth_header
324 assert_response :gone
326 # this won't work since the node never existed
327 delete api_node_path(0), :headers => auth_header
328 assert_response :not_found
330 ## these test whether nodes which are in-use can be deleted:
332 used_node = create(:node, :changeset => create(:changeset, :user => user))
333 way_node = create(:way_node, :node => used_node)
334 way_node2 = create(:way_node, :node => used_node)
336 xml = xml_for_node(used_node)
337 delete api_node_path(used_node), :params => xml.to_s, :headers => auth_header
338 assert_response :precondition_failed,
339 "shouldn't be able to delete a node used in a way (#{@response.body})"
340 assert_equal "Precondition failed: Node #{used_node.id} is still used by ways #{way_node.way.id},#{way_node2.way.id}.", @response.body
343 used_node2 = create(:node, :changeset => create(:changeset, :user => user))
344 relation_member = create(:relation_member, :member => used_node2)
345 relation_member2 = create(:relation_member, :member => used_node2)
347 xml = xml_for_node(used_node2)
348 delete api_node_path(used_node2), :params => xml.to_s, :headers => auth_header
349 assert_response :precondition_failed,
350 "shouldn't be able to delete a node used in a relation (#{@response.body})"
351 assert_equal "Precondition failed: Node #{used_node2.id} is still used by relations #{relation_member.relation.id},#{relation_member2.relation.id}.", @response.body
355 # tests whether the API works and prevents incorrect use while trying
358 invalid_attr_values = [["lat", 91.0], ["lat", -91.0], ["lon", 181.0], ["lon", -181.0]]
360 ## First test with no user credentials
361 # try and update a node without authorisation
362 # first try to delete node without auth
363 private_user = create(:user, :data_public => false)
364 private_node = create(:node, :changeset => create(:changeset, :user => private_user))
366 node = create(:node, :changeset => create(:changeset, :user => user))
368 xml = xml_for_node(node)
369 put api_node_path(node), :params => xml.to_s
370 assert_response :unauthorized
372 ## Second test with the private user
375 auth_header = bearer_authorization_header private_user
377 ## trying to break changesets
379 # try and update in someone else's changeset
380 xml = update_changeset(xml_for_node(private_node),
381 create(:changeset).id)
382 put api_node_path(private_node), :params => xml.to_s, :headers => auth_header
383 assert_require_public_data "update with other user's changeset should be forbidden when data isn't public"
385 # try and update in a closed changeset
386 xml = update_changeset(xml_for_node(private_node),
387 create(:changeset, :closed, :user => private_user).id)
388 put api_node_path(private_node), :params => xml.to_s, :headers => auth_header
389 assert_require_public_data "update with closed changeset should be forbidden, when data isn't public"
391 # try and update in a non-existant changeset
392 xml = update_changeset(xml_for_node(private_node), 0)
393 put api_node_path(private_node), :params => xml.to_s, :headers => auth_header
394 assert_require_public_data "update with changeset=0 should be forbidden, when data isn't public"
396 ## try and submit invalid updates
397 invalid_attr_values.each do |name, value|
398 xml = xml_attr_rewrite(xml_for_node(private_node), name, value)
399 put api_node_path(private_node), :params => xml.to_s, :headers => auth_header
400 assert_require_public_data "node at #{name}=#{value} should be forbidden, when data isn't public"
403 ## finally, produce a good request which still won't work
404 xml = xml_for_node(private_node)
405 put api_node_path(private_node), :params => xml.to_s, :headers => auth_header
406 assert_require_public_data "should have failed with a forbidden when data isn't public"
408 ## Finally test with the public user
411 auth_header = bearer_authorization_header user
413 ## trying to break changesets
415 # try and update in someone else's changeset
416 xml = update_changeset(xml_for_node(node),
417 create(:changeset).id)
418 put api_node_path(node), :params => xml.to_s, :headers => auth_header
419 assert_response :conflict, "update with other user's changeset should be rejected"
421 # try and update in a closed changeset
422 xml = update_changeset(xml_for_node(node),
423 create(:changeset, :closed, :user => user).id)
424 put api_node_path(node), :params => xml.to_s, :headers => auth_header
425 assert_response :conflict, "update with closed changeset should be rejected"
427 # try and update in a non-existant changeset
428 xml = update_changeset(xml_for_node(node), 0)
429 put api_node_path(node), :params => xml.to_s, :headers => auth_header
430 assert_response :conflict, "update with changeset=0 should be rejected"
432 ## try and submit invalid updates
433 invalid_attr_values.each do |name, value|
434 xml = xml_attr_rewrite(xml_for_node(node), name, value)
435 put api_node_path(node), :params => xml.to_s, :headers => auth_header
436 assert_response :bad_request, "node at #{name}=#{value} should be rejected"
439 ## next, attack the versioning
440 current_node_version = node.version
442 # try and submit a version behind
443 xml = xml_attr_rewrite(xml_for_node(node),
444 "version", current_node_version - 1)
445 put api_node_path(node), :params => xml.to_s, :headers => auth_header
446 assert_response :conflict, "should have failed on old version number"
448 # try and submit a version ahead
449 xml = xml_attr_rewrite(xml_for_node(node),
450 "version", current_node_version + 1)
451 put api_node_path(node), :params => xml.to_s, :headers => auth_header
452 assert_response :conflict, "should have failed on skipped version number"
454 # try and submit total crap in the version field
455 xml = xml_attr_rewrite(xml_for_node(node),
456 "version", "p1r4t3s!")
457 put api_node_path(node), :params => xml.to_s, :headers => auth_header
458 assert_response :conflict,
459 "should not be able to put 'p1r4at3s!' in the version field"
461 ## try an update with the wrong ID
462 xml = xml_for_node(create(:node))
463 put api_node_path(node), :params => xml.to_s, :headers => auth_header
464 assert_response :bad_request,
465 "should not be able to update a node with a different ID from the XML"
467 ## try an update with a minimal valid XML doc which isn't a well-formed OSM doc.
469 put api_node_path(node), :params => xml.to_s, :headers => auth_header
470 assert_response :bad_request,
471 "should not be able to update a node with non-OSM XML doc."
473 ## finally, produce a good request which should work
474 xml = xml_for_node(node)
475 put api_node_path(node), :params => xml.to_s, :headers => auth_header
476 assert_response :success, "a valid update request failed"
480 # test adding tags to a node
481 def test_duplicate_tags
482 existing_tag = create(:node_tag)
483 assert existing_tag.node.changeset.user.data_public
485 auth_header = bearer_authorization_header existing_tag.node.changeset.user
487 # add an identical tag to the node
488 tag_xml = XML::Node.new("tag")
489 tag_xml["k"] = existing_tag.k
490 tag_xml["v"] = existing_tag.v
492 # add the tag into the existing xml
493 node_xml = xml_for_node(existing_tag.node)
494 node_xml.find("//osm/node").first << tag_xml
497 put api_node_path(existing_tag.node), :params => node_xml.to_s, :headers => auth_header
498 assert_response :bad_request,
499 "adding duplicate tags to a node should fail with 'bad request'"
500 assert_equal "Element node/#{existing_tag.node.id} has duplicate tags with key #{existing_tag.k}", @response.body
503 # test whether string injection is possible
504 def test_string_injection
505 private_user = create(:user, :data_public => false)
506 private_changeset = create(:changeset, :user => private_user)
508 changeset = create(:changeset, :user => user)
510 ## First try with the non-data public user
511 auth_header = bearer_authorization_header private_user
513 # try and put something into a string that the API might
514 # use unquoted and therefore allow code injection...
517 <node lat='0' lon='0' changeset='#{private_changeset.id}'>
518 <tag k='\#{@user.inspect}' v='0'/>
522 post api_nodes_path, :params => xml, :headers => auth_header
523 assert_require_public_data "Shouldn't be able to create with non-public user"
525 ## Then try with the public data user
526 auth_header = bearer_authorization_header user
528 # try and put something into a string that the API might
529 # use unquoted and therefore allow code injection...
532 <node lat='0' lon='0' changeset='#{changeset.id}'>
533 <tag k='\#{@user.inspect}' v='0'/>
537 post api_nodes_path, :params => xml, :headers => auth_header
538 assert_response :success
539 nodeid = @response.body
541 # find the node in the database
542 checknode = Node.find(nodeid)
543 assert_not_nil checknode, "node not found in data base after upload"
545 # and grab it using the api
546 get api_node_path(nodeid)
547 assert_response :success
548 apinode = Node.from_xml(@response.body)
549 assert_not_nil apinode, "downloaded node is nil, but shouldn't be"
551 # check the tags are not corrupted
552 assert_equal checknode.tags, apinode.tags
553 assert_includes apinode.tags, "\#{@user.inspect}"
557 # test initial rate limit
558 def test_initial_rate_limit
562 # create a changeset that puts us near the initial rate limit
563 changeset = create(:changeset, :user => user,
564 :created_at => Time.now.utc - 5.minutes,
565 :num_changes => Settings.initial_changes_per_hour - 1)
567 # create authentication header
568 auth_header = bearer_authorization_header user
570 # try creating a node
571 xml = "<osm><node lat='0' lon='0' changeset='#{changeset.id}'/></osm>"
572 post api_nodes_path, :params => xml, :headers => auth_header
573 assert_response :success, "node create did not return success status"
575 # get the id of the node we created
576 nodeid = @response.body
578 # try updating the node, which should be rate limited
579 xml = "<osm><node id='#{nodeid}' version='1' lat='1' lon='1' changeset='#{changeset.id}'/></osm>"
580 put api_node_path(nodeid), :params => xml, :headers => auth_header
581 assert_response :too_many_requests, "node update did not hit rate limit"
583 # try deleting the node, which should be rate limited
584 xml = "<osm><node id='#{nodeid}' version='2' lat='1' lon='1' changeset='#{changeset.id}'/></osm>"
585 delete api_node_path(nodeid), :params => xml, :headers => auth_header
586 assert_response :too_many_requests, "node delete did not hit rate limit"
588 # try creating a node, which should be rate limited
589 xml = "<osm><node lat='0' lon='0' changeset='#{changeset.id}'/></osm>"
590 post api_nodes_path, :params => xml, :headers => auth_header
591 assert_response :too_many_requests, "node create did not hit rate limit"
595 # test maximum rate limit
596 def test_maximum_rate_limit
600 # create a changeset to establish our initial edit time
601 changeset = create(:changeset, :user => user,
602 :created_at => Time.now.utc - 28.days)
604 # create changeset to put us near the maximum rate limit
605 total_changes = Settings.max_changes_per_hour - 1
606 while total_changes.positive?
607 changes = [total_changes, Changeset::MAX_ELEMENTS].min
608 changeset = create(:changeset, :user => user,
609 :created_at => Time.now.utc - 5.minutes,
610 :num_changes => changes)
611 total_changes -= changes
614 # create authentication header
615 auth_header = bearer_authorization_header user
617 # try creating a node
618 xml = "<osm><node lat='0' lon='0' changeset='#{changeset.id}'/></osm>"
619 post api_nodes_path, :params => xml, :headers => auth_header
620 assert_response :success, "node create did not return success status"
622 # get the id of the node we created
623 nodeid = @response.body
625 # try updating the node, which should be rate limited
626 xml = "<osm><node id='#{nodeid}' version='1' lat='1' lon='1' changeset='#{changeset.id}'/></osm>"
627 put api_node_path(nodeid), :params => xml, :headers => auth_header
628 assert_response :too_many_requests, "node update did not hit rate limit"
630 # try deleting the node, which should be rate limited
631 xml = "<osm><node id='#{nodeid}' version='2' lat='1' lon='1' changeset='#{changeset.id}'/></osm>"
632 delete api_node_path(nodeid), :params => xml, :headers => auth_header
633 assert_response :too_many_requests, "node delete did not hit rate limit"
635 # try creating a node, which should be rate limited
636 xml = "<osm><node lat='0' lon='0' changeset='#{changeset.id}'/></osm>"
637 post api_nodes_path, :params => xml, :headers => auth_header
638 assert_response :too_many_requests, "node create did not hit rate limit"
644 # update the changeset_id of a node element
645 def update_changeset(xml, changeset_id)
646 xml_attr_rewrite(xml, "changeset", changeset_id)
650 # update an attribute in the node element
651 def xml_attr_rewrite(xml, name, value)
652 xml.find("//osm/node").first[name] = value.to_s