From e8ca9805f1ea6fb13cb7255ea90b127ac3b8201f Mon Sep 17 00:00:00 2001 From: John Christopher Anderson Date: Thu, 5 Mar 2009 19:47:25 +0000 Subject: allow multi-key POST requests for _list. closes COUCHDB-269. thanks Jason Davies git-svn-id: https://svn.apache.org/repos/asf/couchdb/trunk@750565 13f79535-47bb-0310-9956-ffa450edef68 --- src/couchdb/couch_httpd_show.erl | 255 ++++++++++++++++++++++++++------------- 1 file changed, 174 insertions(+), 81 deletions(-) (limited to 'src/couchdb/couch_httpd_show.erl') diff --git a/src/couchdb/couch_httpd_show.erl b/src/couchdb/couch_httpd_show.erl index 398ed4c9..6fda61b3 100644 --- a/src/couchdb/couch_httpd_show.erl +++ b/src/couchdb/couch_httpd_show.erl @@ -58,13 +58,23 @@ handle_view_list_req(#httpd{method='GET',path_parts=[_, _, DesignName, ListName, #doc{body={Props}} = couch_httpd_db:couch_doc_open(Db, DesignId, [], []), Lang = proplists:get_value(<<"language">>, Props, <<"javascript">>), ListSrc = get_nested_json_value({Props}, [<<"lists">>, ListName]), - send_view_list_response(Lang, ListSrc, ViewName, DesignId, Req, Db); + send_view_list_response(Lang, ListSrc, ViewName, DesignId, Req, Db, nil); handle_view_list_req(#httpd{method='GET'}=Req, _Db) -> send_error(Req, 404, <<"list_error">>, <<"Invalid path.">>); +handle_view_list_req(#httpd{method='POST',path_parts=[_, _, DesignName, ListName, ViewName]}=Req, Db) -> + DesignId = <<"_design/", DesignName/binary>>, + #doc{body={Props}} = couch_httpd_db:couch_doc_open(Db, DesignId, [], []), + Lang = proplists:get_value(<<"language">>, Props, <<"javascript">>), + ListSrc = get_nested_json_value({Props}, [<<"lists">>, ListName]), + ReqBody = couch_httpd:body(Req), + {Props2} = ?JSON_DECODE(ReqBody), + Keys = proplists:get_value(<<"keys">>, Props2, nil), + send_view_list_response(Lang, ListSrc, ViewName, DesignId, Req#httpd{req_body=ReqBody}, Db, Keys); + handle_view_list_req(Req, _Db) -> - send_method_not_allowed(Req, "GET,HEAD"). + send_method_not_allowed(Req, "GET,POST,HEAD"). get_nested_json_value({Props}, [Key|Keys]) -> @@ -77,30 +87,70 @@ get_nested_json_value(Value, []) -> get_nested_json_value(_NotJSONObj, _) -> throw({not_found, json_mismatch}). -send_view_list_response(Lang, ListSrc, ViewName, DesignId, Req, Db) -> +send_view_list_response(Lang, ListSrc, ViewName, DesignId, Req, Db, Keys) -> #view_query_args{ stale = Stale, reduce = Reduce } = QueryArgs = couch_httpd_view:parse_view_query(Req, nil, nil, true), case couch_view:get_map_view(Db, DesignId, ViewName, Stale) of {ok, View, Group} -> - output_map_list(Req, Lang, ListSrc, View, Group, Db, QueryArgs); + output_map_list(Req, Lang, ListSrc, View, Group, Db, QueryArgs, Keys); {not_found, _Reason} -> case couch_view:get_reduce_view(Db, DesignId, ViewName, Stale) of {ok, ReduceView, Group} -> case Reduce of false -> MapView = couch_view:extract_map_view(ReduceView), - output_map_list(Req, Lang, ListSrc, MapView, Group, Db, QueryArgs); + output_map_list(Req, Lang, ListSrc, MapView, Group, Db, QueryArgs, Keys); _ -> - output_reduce_list(Req, Lang, ListSrc, ReduceView, Group, Db, QueryArgs) + output_reduce_list(Req, Lang, ListSrc, ReduceView, Group, Db, QueryArgs, Keys) end; {not_found, Reason} -> throw({not_found, Reason}) end end. -output_map_list(#httpd{mochi_req=MReq}=Req, Lang, ListSrc, View, Group, Db, QueryArgs) -> +make_map_start_resp_fun(QueryServer, Req, Db, CurrentEtag) -> + fun(Req2, _Etag, TotalViewCount, Offset) -> + ExternalResp = couch_query_servers:render_list_head(QueryServer, + Req2, Db, TotalViewCount, Offset), + JsonResp = apply_etag(ExternalResp, CurrentEtag), + #extern_resp_args{ + code = Code, + data = BeginBody, + ctype = CType, + headers = ExtHeaders + } = couch_httpd_external:parse_external_response(JsonResp), + JsonHeaders = couch_httpd_external:default_or_content_type(CType, ExtHeaders), + {ok, Resp} = start_chunked_response(Req, Code, JsonHeaders), + {ok, Resp, binary_to_list(BeginBody)} + end. + +make_map_send_row_fun(QueryServer, Req) -> + fun(Resp, Db2, {{Key, DocId}, Value}, + RowFront, _IncludeDocs) -> + JsonResp = couch_query_servers:render_list_row(QueryServer, + Req, Db2, {{Key, DocId}, Value}), + #extern_resp_args{ + stop = StopIter, + data = RowBody + } = couch_httpd_external:parse_external_response(JsonResp), + case StopIter of + true -> stop; + _ -> + RowFront2 = case RowFront of + nil -> []; + _ -> RowFront + end, + Chunk = RowFront2 ++ binary_to_list(RowBody), + case Chunk of + [] -> {ok, Resp}; + _ -> send_chunk(Resp, Chunk) + end + end + end. + +output_map_list(#httpd{mochi_req=MReq}=Req, Lang, ListSrc, View, Group, Db, QueryArgs, nil) -> #view_query_args{ limit = Limit, direction = Dir, @@ -119,43 +169,8 @@ output_map_list(#httpd{mochi_req=MReq}=Req, Lang, ListSrc, View, Group, Db, Quer % pass it into the view fold with closures {ok, QueryServer} = couch_query_servers:start_view_list(Lang, ListSrc), - StartListRespFun = fun(Req2, _Etag, TotalViewCount, Offset) -> - ExternalResp = couch_query_servers:render_list_head(QueryServer, - Req2, Db, TotalViewCount, Offset), - JsonResp = apply_etag(ExternalResp, CurrentEtag), - #extern_resp_args{ - code = Code, - data = BeginBody, - ctype = CType, - headers = ExtHeaders - } = couch_httpd_external:parse_external_response(JsonResp), - JsonHeaders = couch_httpd_external:default_or_content_type(CType, ExtHeaders), - {ok, Resp} = start_chunked_response(Req, Code, JsonHeaders), - {ok, Resp, binary_to_list(BeginBody)} - end, - - SendListRowFun = fun(Resp, Db2, {{Key, DocId}, Value}, - RowFront, _IncludeDocs) -> - JsonResp = couch_query_servers:render_list_row(QueryServer, - Req, Db2, {{Key, DocId}, Value}), - #extern_resp_args{ - stop = StopIter, - data = RowBody - } = couch_httpd_external:parse_external_response(JsonResp), - case StopIter of - true -> stop; - _ -> - RowFront2 = case RowFront of - nil -> []; - _ -> RowFront - end, - Chunk = RowFront2 ++ binary_to_list(RowBody), - case Chunk of - [] -> {ok, Resp}; - _ -> send_chunk(Resp, Chunk) - end - end - end, + StartListRespFun = make_map_start_resp_fun(QueryServer, Req, Db, CurrentEtag), + SendListRowFun = make_map_send_row_fun(QueryServer, Req), FoldlFun = couch_httpd_view:make_view_fold_fun(Req, QueryArgs, CurrentEtag, Db, RowCount, #view_fold_helper_funs{ @@ -166,9 +181,85 @@ output_map_list(#httpd{mochi_req=MReq}=Req, Lang, ListSrc, View, Group, Db, Quer FoldAccInit = {Limit, SkipCount, undefined, []}, FoldResult = couch_view:fold(View, Start, Dir, FoldlFun, FoldAccInit), finish_list(Req, Db, QueryServer, CurrentEtag, FoldResult, StartListRespFun, RowCount) + end); + +output_map_list(#httpd{mochi_req=MReq}=Req, Lang, ListSrc, View, Group, Db, QueryArgs, Keys) -> + #view_query_args{ + limit = Limit, + direction = Dir, + skip = SkipCount, + start_docid = StartDocId + } = QueryArgs, + {ok, RowCount} = couch_view:get_row_count(View), + Headers = MReq:get(headers), + Hlist = mochiweb_headers:to_list(Headers), + Accept = proplists:get_value('Accept', Hlist), + CurrentEtag = couch_httpd_view:view_group_etag(Group, {Lang, ListSrc, Accept}), + couch_httpd:etag_respond(Req, CurrentEtag, fun() -> + % get the os process here + % pass it into the view fold with closures + {ok, QueryServer} = couch_query_servers:start_view_list(Lang, ListSrc), + + StartListRespFun = make_map_start_resp_fun(QueryServer, Req, Db, CurrentEtag), + SendListRowFun = make_map_send_row_fun(QueryServer, Req), + + FoldAccInit = {Limit, SkipCount, undefined, []}, + FoldResult = lists:foldl( + fun(Key, {ok, FoldAcc}) -> + FoldlFun = couch_httpd_view:make_view_fold_fun(Req, QueryArgs#view_query_args{ + start_key = Key, + end_key = Key + }, CurrentEtag, Db, RowCount, + #view_fold_helper_funs{ + reduce_count = fun couch_view:reduce_to_count/1, + start_response = StartListRespFun, + send_row = SendListRowFun + }), + couch_view:fold(View, {Key, StartDocId}, Dir, FoldlFun, FoldAcc) + end, {ok, FoldAccInit}, Keys), + finish_list(Req, Db, QueryServer, CurrentEtag, FoldResult, StartListRespFun, RowCount) end). -output_reduce_list(#httpd{mochi_req=MReq}=Req, Lang, ListSrc, View, Group, Db, QueryArgs) -> +make_reduce_start_resp_fun(QueryServer, Req, Db, CurrentEtag) -> + fun(Req2, _Etag, _, _) -> + JsonResp = couch_query_servers:render_reduce_head(QueryServer, + Req2, Db), + JsonResp2 = apply_etag(JsonResp, CurrentEtag), + #extern_resp_args{ + code = Code, + data = BeginBody, + ctype = CType, + headers = ExtHeaders + } = couch_httpd_external:parse_external_response(JsonResp2), + JsonHeaders = couch_httpd_external:default_or_content_type(CType, ExtHeaders), + {ok, Resp} = start_chunked_response(Req, Code, JsonHeaders), + {ok, Resp, binary_to_list(BeginBody)} + end. + +make_reduce_send_row_fun(QueryServer, Req, Db) -> + fun(Resp, {Key, Value}, RowFront) -> + JsonResp = couch_query_servers:render_reduce_row(QueryServer, + Req, Db, {Key, Value}), + #extern_resp_args{ + stop = StopIter, + data = RowBody + } = couch_httpd_external:parse_external_response(JsonResp), + RowFront2 = case RowFront of + nil -> []; + _ -> RowFront + end, + case StopIter of + true -> stop; + _ -> + Chunk = RowFront2 ++ binary_to_list(RowBody), + case Chunk of + [] -> {ok, Resp}; + _ -> send_chunk(Resp, Chunk) + end + end + end. + +output_reduce_list(#httpd{mochi_req=MReq}=Req, Lang, ListSrc, View, Group, Db, QueryArgs, nil) -> #view_query_args{ limit = Limit, direction = Dir, @@ -187,42 +278,8 @@ output_reduce_list(#httpd{mochi_req=MReq}=Req, Lang, ListSrc, View, Group, Db, Q Accept = proplists:get_value('Accept', Hlist), CurrentEtag = couch_httpd_view:view_group_etag(Group, {Lang, ListSrc, Accept}), couch_httpd:etag_respond(Req, CurrentEtag, fun() -> - StartListRespFun = fun(Req2, _Etag, _, _) -> - JsonResp = couch_query_servers:render_reduce_head(QueryServer, - Req2, Db), - JsonResp2 = apply_etag(JsonResp, CurrentEtag), - #extern_resp_args{ - code = Code, - data = BeginBody, - ctype = CType, - headers = ExtHeaders - } = couch_httpd_external:parse_external_response(JsonResp2), - JsonHeaders = couch_httpd_external:default_or_content_type(CType, ExtHeaders), - {ok, Resp} = start_chunked_response(Req, Code, JsonHeaders), - {ok, Resp, binary_to_list(BeginBody)} - end, - - SendListRowFun = fun(Resp, {Key, Value}, RowFront) -> - JsonResp = couch_query_servers:render_reduce_row(QueryServer, - Req, Db, {Key, Value}), - #extern_resp_args{ - stop = StopIter, - data = RowBody - } = couch_httpd_external:parse_external_response(JsonResp), - RowFront2 = case RowFront of - nil -> []; - _ -> RowFront - end, - case StopIter of - true -> stop; - _ -> - Chunk = RowFront2 ++ binary_to_list(RowBody), - case Chunk of - [] -> {ok, Resp}; - _ -> send_chunk(Resp, Chunk) - end - end - end, + StartListRespFun = make_reduce_start_resp_fun(QueryServer, Req, Db, CurrentEtag), + SendListRowFun = make_reduce_send_row_fun(QueryServer, Req, Db), {ok, GroupRowsFun, RespFun} = couch_httpd_view:make_reduce_fold_funs(Req, GroupLevel, QueryArgs, CurrentEtag, @@ -235,6 +292,42 @@ output_reduce_list(#httpd{mochi_req=MReq}=Req, Lang, ListSrc, View, Group, Db, Q {EndKey, EndDocId}, GroupRowsFun, RespFun, FoldAccInit), finish_list(Req, Db, QueryServer, CurrentEtag, FoldResult, StartListRespFun, null) + end); + +output_reduce_list(#httpd{mochi_req=MReq}=Req, Lang, ListSrc, View, Group, Db, QueryArgs, Keys) -> + #view_query_args{ + limit = Limit, + direction = Dir, + skip = SkipCount, + start_docid = StartDocId, + end_docid = EndDocId, + group_level = GroupLevel + } = QueryArgs, + % get the os process here + % pass it into the view fold with closures + {ok, QueryServer} = couch_query_servers:start_view_list(Lang, ListSrc), + Headers = MReq:get(headers), + Hlist = mochiweb_headers:to_list(Headers), + Accept = proplists:get_value('Accept', Hlist), + CurrentEtag = couch_httpd_view:view_group_etag(Group, {Lang, ListSrc, Accept, Keys}), + + couch_httpd:etag_respond(Req, CurrentEtag, fun() -> + StartListRespFun = make_reduce_start_resp_fun(QueryServer, Req, Db, CurrentEtag), + SendListRowFun = make_reduce_send_row_fun(QueryServer, Req, Db), + + {ok, GroupRowsFun, RespFun} = couch_httpd_view:make_reduce_fold_funs(Req, + GroupLevel, QueryArgs, CurrentEtag, + #reduce_fold_helper_funs{ + start_response = StartListRespFun, + send_row = SendListRowFun + }), + FoldAccInit = {Limit, SkipCount, undefined, []}, + FoldResult = lists:foldl( + fun(Key, {ok, FoldAcc}) -> + couch_view:fold_reduce(View, Dir, {Key, StartDocId}, + {Key, EndDocId}, GroupRowsFun, RespFun, FoldAcc) + end, {ok, FoldAccInit}, Keys), + finish_list(Req, Db, QueryServer, CurrentEtag, FoldResult, StartListRespFun, null) end). finish_list(Req, Db, QueryServer, Etag, FoldResult, StartListRespFun, TotalRows) -> -- cgit v1.2.3