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-rw-r--r--src/couchdb/couch_rep_changes_feed.erl125
1 files changed, 100 insertions, 25 deletions
diff --git a/src/couchdb/couch_rep_changes_feed.erl b/src/couchdb/couch_rep_changes_feed.erl
index 604dc0aa..e0d8c30d 100644
--- a/src/couchdb/couch_rep_changes_feed.erl
+++ b/src/couchdb/couch_rep_changes_feed.erl
@@ -34,7 +34,8 @@
count = 0,
partial_chunk = <<>>,
reply_to = nil,
- rows = queue:new()
+ rows = queue:new(),
+ doc_ids = nil
}).
-import(couch_util, [
@@ -87,21 +88,38 @@ init([Parent, #http_db{headers = Headers0} = Source, Since, PostProps]) ->
},
{ibrowse_req_id, ReqId} = couch_rep_httpc:request(Req),
Args = [Parent, Req, Since, PostProps],
+ State = #state{
+ conn = Pid,
+ last_seq = Since,
+ reqid = ReqId,
+ init_args = Args,
+ doc_ids = get_value(<<"doc_ids">>, PostProps, nil)
+ },
receive
{ibrowse_async_headers, ReqId, "200", _} ->
ibrowse:stream_next(ReqId),
- {ok, #state{conn=Pid, last_seq=Since, reqid=ReqId, init_args=Args}};
+ {ok, State};
{ibrowse_async_headers, ReqId, Code, Hdrs}
when Code =:= "301"; Code =:= "302"; Code =:= "303" ->
- stop_link_worker(Pid),
- Req2 = couch_rep_httpc:redirected_request(Code, Hdrs, Req),
- Pid2 = couch_rep_httpc:spawn_link_worker_process(Req2),
- Req3 = Req2#http_db{conn = Pid2},
- {ibrowse_req_id, ReqId2} = couch_rep_httpc:request(Req3),
- Args2 = [Parent, Req3, Since, PostProps],
- receive {ibrowse_async_headers, ReqId2, "200", _} ->
- {ok, #state{conn=Pid2, last_seq=Since, reqid=ReqId2, init_args=Args2}}
+ {ReqId2, Req2} = redirect_req(Req, Code, Hdrs),
+ receive
+ {ibrowse_async_headers, ReqId2, "200", _} ->
+ {ok, State#state{
+ conn = Req2#http_db.conn,
+ reqid = ReqId2,
+ init_args = [Parent, Req2, Since, PostProps]}};
+ {ibrowse_async_headers, ReqId2, "405", _} when Method =:= post ->
+ {ReqId3, Req3} = req_no_builtin_doc_ids(Req2, ReqId2),
+ receive
+ {ibrowse_async_headers, ReqId3, "200", _} ->
+ {ok, State#state{
+ conn = Req3#http_db.conn,
+ reqid = ReqId3,
+ init_args = [Parent, Req3, Since, PostProps]}}
+ after 30000 ->
+ {stop, changes_timeout}
+ end
after 30000 ->
{stop, changes_timeout}
end;
@@ -110,7 +128,30 @@ init([Parent, #http_db{headers = Headers0} = Source, Since, PostProps]) ->
?LOG_INFO("source doesn't have _changes, trying _all_docs_by_seq", []),
Self = self(),
BySeqPid = spawn_link(fun() -> by_seq_loop(Self, Source, Since) end),
- {ok, #state{last_seq=Since, changes_loop=BySeqPid, init_args=Args}};
+ {ok, State#state{changes_loop = BySeqPid}};
+ {ibrowse_async_headers, ReqId, "405", _} when Method =:= post ->
+ {ReqId2, Req2} = req_no_builtin_doc_ids(Req, ReqId),
+ receive
+ {ibrowse_async_headers, ReqId2, "200", _} ->
+ {ok, State#state{
+ conn = Req2#http_db.conn,
+ reqid = ReqId2,
+ init_args = [Parent, Req2, Since, PostProps]}};
+ {ibrowse_async_headers, ReqId, Code, Hdrs}
+ when Code =:= "301"; Code =:= "302"; Code =:= "303" ->
+ {ReqId3, Req3} = redirect_req(Req2, Code, Hdrs),
+ receive
+ {ibrowse_async_headers, ReqId3, "200", _} ->
+ {ok, State#state{
+ conn = Req3#http_db.conn,
+ reqid = ReqId3,
+ init_args = [Parent, Req3, Since, PostProps]}}
+ after 30000 ->
+ {stop, changes_timeout}
+ end
+ after 30000 ->
+ {stop, changes_timeout}
+ end;
{ibrowse_async_headers, ReqId, Code, _} ->
{stop, {changes_error_code, list_to_integer(Code)}}
after 10000 ->
@@ -263,12 +304,9 @@ code_change(_OldVsn, State, _Extra) ->
%internal funs
handle_add_change(Row, From, #state{reply_to=nil} = State) ->
- #state{
- count = Count,
- rows = Rows
- } = State,
- NewState = State#state{count=Count+1, rows=queue:in(Row,Rows)},
- if Count < ?BUFFER_SIZE ->
+ {Rows2, Count2} = queue_changes_row(Row, State),
+ NewState = State#state{count = Count2, rows = Rows2},
+ if Count2 =< ?BUFFER_SIZE ->
{reply, ok, NewState};
true ->
{noreply, NewState#state{changes_from=From}}
@@ -320,21 +358,17 @@ handle_messages([<<"]">>, <<"\"last_seq\":", _/binary>>], State) ->
handle_feed_completion(State);
handle_messages([<<"{\"last_seq\":", _/binary>>], State) ->
handle_feed_completion(State);
-handle_messages([Chunk|Rest], State) ->
- #state{
- count = Count,
- partial_chunk = Partial,
- rows = Rows
- } = State,
+handle_messages([Chunk|Rest], #state{partial_chunk = Partial} = State) ->
NewState = try
Row = {Props} = decode_row(<<Partial/binary, Chunk/binary>>),
case State of
#state{reply_to=nil} ->
+ {Rows2, Count2} = queue_changes_row(Row, State),
State#state{
- count = Count+1,
last_seq = couch_util:get_value(<<"seq">>, Props),
partial_chunk = <<>>,
- rows=queue:in(Row,Rows)
+ rows = Rows2,
+ count = Count2
};
#state{count=0, reply_to=From}->
gen_server:reply(From, [Row]),
@@ -422,3 +456,44 @@ stop_link_worker(Conn) when is_pid(Conn) ->
catch ibrowse:stop_worker_process(Conn);
stop_link_worker(_) ->
ok.
+
+redirect_req(#http_db{conn = WorkerPid} = Req, Code, Headers) ->
+ stop_link_worker(WorkerPid),
+ Req2 = couch_rep_httpc:redirected_request(Code, Headers, Req),
+ WorkerPid2 = couch_rep_httpc:spawn_link_worker_process(Req2),
+ Req3 = Req2#http_db{conn = WorkerPid2},
+ {ibrowse_req_id, ReqId} = couch_rep_httpc:request(Req3),
+ {ReqId, Req3}.
+
+req_no_builtin_doc_ids(#http_db{conn = WorkerPid, qs = QS} = Req, ReqId) ->
+ % CouchDB versions prior to 1.1.0 don't have the builtin filter _doc_ids
+ % and don't allow POSTing to /database/_changes
+ purge_req_messages(ReqId),
+ stop_link_worker(WorkerPid),
+ Req2 = Req#http_db{method = get, qs = lists:keydelete("filter", 1, QS)},
+ WorkerPid2 = couch_rep_httpc:spawn_link_worker_process(Req2),
+ Req3 = Req2#http_db{conn = WorkerPid2},
+ {ibrowse_req_id, ReqId2} = couch_rep_httpc:request(Req3),
+ {ReqId2, Req3}.
+
+purge_req_messages(ReqId) ->
+ ibrowse:stream_next(ReqId),
+ receive
+ {ibrowse_async_response, ReqId, {error, _}} ->
+ ok;
+ {ibrowse_async_response, ReqId, _Data} ->
+ purge_req_messages(ReqId);
+ {ibrowse_async_response_end, ReqId} ->
+ ok
+ end.
+
+queue_changes_row(Row, #state{doc_ids = nil, count = Count, rows = Rows}) ->
+ {queue:in(Row, Rows), Count + 1};
+queue_changes_row({RowProps} = Row,
+ #state{doc_ids = Ids, count = Count, rows = Rows}) ->
+ case lists:member(get_value(<<"id">>, RowProps), Ids) of
+ true ->
+ {queue:in(Row, Rows), Count + 1};
+ false ->
+ {Rows, Count}
+ end.