use get-deps to pull down individual cloudant projects

1 files changed, 0 insertions, 1082 deletions

diff --git a/apps/chttpd/src/chttpd_db.erl b/apps/chttpd/src/chttpd_db.erl
deleted file mode 100644
index fc219621..00000000
--- a/apps/chttpd/src/chttpd_db.erl
+++ /dev/null
@@ -1,1082 +0,0 @@
-% Licensed under the Apache License, Version 2.0 (the "License"); you may not
-% use this file except in compliance with the License. You may obtain a copy of
-% the License at
-%
-%   http://www.apache.org/licenses/LICENSE-2.0
-%
-% Unless required by applicable law or agreed to in writing, software
-% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-% License for the specific language governing permissions and limitations under
-% the License.
-
--module(chttpd_db).
--include_lib("couch/include/couch_db.hrl").
-
--export([handle_request/1, handle_compact_req/2, handle_design_req/2,
-    db_req/2, couch_doc_open/4,handle_changes_req/2,
-    update_doc_result_to_json/1, update_doc_result_to_json/2,
-    handle_design_info_req/3, handle_view_cleanup_req/2]).
-
--import(chttpd,
-    [send_json/2,send_json/3,send_json/4,send_method_not_allowed/2,
-    start_json_response/2,send_chunk/2,end_json_response/1,
-    start_chunked_response/3, absolute_uri/2, send/2,
-    start_response_length/4]).
-
--record(doc_query_args, {
-    options = [],
-    rev = nil,
-    open_revs = [],
-    update_type = interactive_edit,
-    atts_since = nil
-}).
-
-% Database request handlers
-handle_request(#httpd{path_parts=[DbName|RestParts],method=Method,
-        db_url_handlers=DbUrlHandlers}=Req)->
-    case {Method, RestParts} of
-    {'PUT', []} ->
-        create_db_req(Req, DbName);
-    {'DELETE', []} ->
-        delete_db_req(Req, DbName);
-    {_, []} ->
-        do_db_req(Req, fun db_req/2);
-    {_, [SecondPart|_]} ->
-        Handler = couch_util:get_value(SecondPart, DbUrlHandlers, fun db_req/2),
-        do_db_req(Req, Handler)
-    end.
-
-handle_changes_req(#httpd{method='GET'}=Req, Db) ->
-    #changes_args{filter=Raw, style=Style} = Args0 = parse_changes_query(Req),
-    ChangesArgs = Args0#changes_args{
-        filter = couch_changes:configure_filter(Raw, Style, Req, Db)
-    },
-    case ChangesArgs#changes_args.feed of
-    "normal" ->
-        T0 = now(),
-        {ok, Info} = fabric:get_db_info(Db),
-        Etag = chttpd:make_etag(Info),
-        DeltaT = timer:now_diff(now(), T0) / 1000,
-        couch_stats_collector:record({couchdb, dbinfo}, DeltaT),
-        chttpd:etag_respond(Req, Etag, fun() ->
-            {ok, Resp} = chttpd:start_json_response(Req, 200, [{"Etag",Etag}]),
-            fabric:changes(Db, fun changes_callback/2, {"normal", Resp},
-                ChangesArgs)
-        end);
-    Feed ->
-        % "longpoll" or "continuous"
-        {ok, Resp} = chttpd:start_json_response(Req, 200),
-        fabric:changes(Db, fun changes_callback/2, {Feed, Resp}, ChangesArgs)
-    end;
-handle_changes_req(#httpd{path_parts=[_,<<"_changes">>]}=Req, _Db) ->
-    send_method_not_allowed(Req, "GET,HEAD").
-
-% callbacks for continuous feed (newline-delimited JSON Objects)
-changes_callback(start, {"continuous", _} = Acc) ->
-    {ok, Acc};
-changes_callback({change, Change}, {"continuous", Resp} = Acc) ->
-    send_chunk(Resp, [?JSON_ENCODE(Change) | "\n"]),
-    {ok, Acc};
-changes_callback({stop, EndSeq0}, {"continuous", Resp}) ->
-    EndSeq = case is_old_couch(Resp) of true -> 0; false -> EndSeq0 end,
-    send_chunk(Resp, [?JSON_ENCODE({[{<<"last_seq">>, EndSeq}]}) | "\n"]),
-    end_json_response(Resp);
-
-% callbacks for longpoll and normal (single JSON Object)
-changes_callback(start, {_, Resp}) ->
-    send_chunk(Resp, "{\"results\":[\n"),
-    {ok, {"", Resp}};
-changes_callback({change, Change}, {Prepend, Resp}) ->
-    send_chunk(Resp, [Prepend, ?JSON_ENCODE(Change)]),
-    {ok, {",\r\n", Resp}};
-changes_callback({stop, EndSeq}, {_, Resp}) ->
-    case is_old_couch(Resp) of
-    true ->
-        send_chunk(Resp, "\n],\n\"last_seq\":0}\n");
-    false ->
-        send_chunk(Resp, io_lib:format("\n],\n\"last_seq\":\"~s\"}\n",[EndSeq]))
-    end,
-    end_json_response(Resp);
-
-changes_callback(timeout, {Prepend, Resp}) ->
-    send_chunk(Resp, "\n"),
-    {ok, {Prepend, Resp}};
-changes_callback({error, Reason}, Resp) ->
-    chttpd:send_chunked_error(Resp, {error, Reason}).
-
-is_old_couch(Resp) ->
-    MochiReq = Resp:get(request),
-    case MochiReq:get_header_value("user-agent") of
-    undefined ->
-        false;
-    UserAgent ->
-        string:str(UserAgent, "CouchDB/0") > 0
-    end.
-
-handle_compact_req(Req, _) ->
-    Msg = <<"Compaction must be triggered on a per-shard basis in BigCouch">>,
-    couch_httpd:send_error(Req, 403, forbidden, Msg).
-
-handle_view_cleanup_req(Req, Db) ->
-    ok = fabric:cleanup_index_files(Db),
-    send_json(Req, 202, {[{ok, true}]}).
-
-handle_design_req(#httpd{
-        path_parts=[_DbName, _Design, Name, <<"_",_/binary>> = Action | _Rest],
-        design_url_handlers = DesignUrlHandlers
-    }=Req, Db) ->
-    case fabric:open_doc(Db, <<"_design/", Name/binary>>, []) of
-    {ok, DDoc} ->
-        % TODO we'll trigger a badarity here if ddoc attachment starts with "_",
-        % or if user tries an unknown Action
-        Handler = couch_util:get_value(Action, DesignUrlHandlers, fun db_req/2),
-        Handler(Req, Db, DDoc);
-    Error ->
-        throw(Error)
-    end;
-
-handle_design_req(Req, Db) ->
-    db_req(Req, Db).
-
-handle_design_info_req(#httpd{method='GET'}=Req, Db, #doc{id=Id} = DDoc) ->
-    {ok, GroupInfoList} = fabric:get_view_group_info(Db, DDoc),
-    send_json(Req, 200, {[
-        {name,  Id},
-        {view_index, {GroupInfoList}}
-    ]});
-
-handle_design_info_req(Req, _Db, _DDoc) ->
-    send_method_not_allowed(Req, "GET").
-
-create_db_req(#httpd{user_ctx=UserCtx}=Req, DbName) ->
-    N = couch_httpd:qs_value(Req, "n", couch_config:get("cluster", "n", "3")),
-    Q = couch_httpd:qs_value(Req, "q", couch_config:get("cluster", "q", "8")),
-    case fabric:create_db(DbName, [{user_ctx,UserCtx}, {n,N}, {q,Q}]) of
-    ok ->
-        DocUrl = absolute_uri(Req, "/" ++ couch_util:url_encode(DbName)),
-        send_json(Req, 201, [{"Location", DocUrl}], {[{ok, true}]});
-    {error, file_exists} ->
-        chttpd:send_error(Req, file_exists);
-    Error ->
-        throw(Error)
-    end.
-
-delete_db_req(#httpd{user_ctx=UserCtx}=Req, DbName) ->
-    case fabric:delete_db(DbName, [{user_ctx, UserCtx}]) of
-    ok ->
-        send_json(Req, 200, {[{ok, true}]});
-    Error ->
-        throw(Error)
-    end.
-
-do_db_req(#httpd{path_parts=[DbName|_]}=Req, Fun) ->
-    Fun(Req, #db{name=DbName}).
-
-db_req(#httpd{method='GET',path_parts=[DbName]}=Req, _Db) ->
-    % measure the time required to generate the etag, see if it's worth it
-    T0 = now(),
-    {ok, DbInfo} = fabric:get_db_info(DbName),
-    DeltaT = timer:now_diff(now(), T0) / 1000,
-    couch_stats_collector:record({couchdb, dbinfo}, DeltaT),
-    send_json(Req, {DbInfo});
-
-db_req(#httpd{method='POST', path_parts=[DbName], user_ctx=Ctx}=Req, Db) ->
-    couch_httpd:validate_ctype(Req, "application/json"),
-    Doc = couch_doc:from_json_obj(couch_httpd:json_body(Req)),
-    Doc2 = case Doc#doc.id of
-        <<"">> ->
-            Doc#doc{id=couch_uuids:new(), revs={0, []}};
-        _ ->
-            Doc
-    end,
-    DocId = Doc2#doc.id,
-    case couch_httpd:qs_value(Req, "batch") of
-    "ok" ->
-        % async_batching
-        spawn(fun() ->
-                case catch(fabric:update_doc(Db, Doc2, [{user_ctx, Ctx}])) of
-                {ok, _} -> ok;
-                Error ->
-                    ?LOG_INFO("Batch doc error (~s): ~p",[DocId, Error])
-                end
-            end),
-
-        send_json(Req, 202, [], {[
-            {ok, true},
-            {id, DocId}
-        ]});
-    _Normal ->
-        % normal
-        {ok, NewRev} = fabric:update_doc(Db, Doc2, [{user_ctx, Ctx}]),
-        DocUrl = absolute_uri(Req, [$/, DbName, $/, DocId]),
-        send_json(Req, 201, [{"Location", DocUrl}], {[
-            {ok, true},
-            {id, DocId},
-            {rev, couch_doc:rev_to_str(NewRev)}
-        ]})
-    end;
-
-db_req(#httpd{path_parts=[_DbName]}=Req, _Db) ->
-    send_method_not_allowed(Req, "DELETE,GET,HEAD,POST");
-
-db_req(#httpd{method='POST',path_parts=[_,<<"_ensure_full_commit">>]}=Req, _Db) ->
-    send_json(Req, 201, {[
-        {ok, true},
-        {instance_start_time, <<"0">>}
-    ]});
-
-db_req(#httpd{path_parts=[_,<<"_ensure_full_commit">>]}=Req, _Db) ->
-    send_method_not_allowed(Req, "POST");
-
-db_req(#httpd{method='POST',path_parts=[_,<<"_bulk_docs">>], user_ctx=Ctx}=Req, Db) ->
-    couch_stats_collector:increment({httpd, bulk_requests}),
-    couch_httpd:validate_ctype(Req, "application/json"),
-    {JsonProps} = chttpd:json_body_obj(Req),
-    DocsArray = couch_util:get_value(<<"docs">>, JsonProps),
-    case chttpd:header_value(Req, "X-Couch-Full-Commit") of
-    "true" ->
-        Options = [full_commit, {user_ctx,Ctx}];
-    "false" ->
-        Options = [delay_commit, {user_ctx,Ctx}];
-    _ ->
-        Options = [{user_ctx,Ctx}]
-    end,
-    case couch_util:get_value(<<"new_edits">>, JsonProps, true) of
-    true ->
-        Docs = lists:map(
-            fun({ObjProps} = JsonObj) ->
-                Doc = couch_doc:from_json_obj(JsonObj),
-                validate_attachment_names(Doc),
-                Id = case Doc#doc.id of
-                    <<>> -> couch_uuids:new();
-                    Id0 -> Id0
-                end,
-                case couch_util:get_value(<<"_rev">>, ObjProps) of
-                undefined ->
-                    Revs = {0, []};
-                Rev  ->
-                    {Pos, RevId} = couch_doc:parse_rev(Rev),
-                    Revs = {Pos, [RevId]}
-                end,
-                Doc#doc{id=Id,revs=Revs}
-            end,
-            DocsArray),
-        Options2 =
-        case couch_util:get_value(<<"all_or_nothing">>, JsonProps) of
-        true  -> [all_or_nothing|Options];
-        _ -> Options
-        end,
-        case fabric:update_docs(Db, Docs, Options2) of
-        {ok, Results} ->
-            % output the results
-            DocResults = lists:zipwith(fun update_doc_result_to_json/2,
-                Docs, Results),
-            send_json(Req, 201, DocResults);
-        {aborted, Errors} ->
-            ErrorsJson =
-                lists:map(fun update_doc_result_to_json/1, Errors),
-            send_json(Req, 417, ErrorsJson)
-        end;
-    false ->
-        Docs = [couch_doc:from_json_obj(JsonObj) || JsonObj <- DocsArray],
-        [validate_attachment_names(D) || D <- Docs],
-        {ok, Errors} = fabric:update_docs(Db, Docs, [replicated_changes|Options]),
-        ErrorsJson = lists:map(fun update_doc_result_to_json/1, Errors),
-        send_json(Req, 201, ErrorsJson)
-    end;
-
-db_req(#httpd{path_parts=[_,<<"_bulk_docs">>]}=Req, _Db) ->
-    send_method_not_allowed(Req, "POST");
-
-db_req(#httpd{method='POST',path_parts=[_,<<"_purge">>]}=Req, Db) ->
-    couch_httpd:validate_ctype(Req, "application/json"),
-    {IdsRevs} = chttpd:json_body_obj(Req),
-    IdsRevs2 = [{Id, couch_doc:parse_revs(Revs)} || {Id, Revs} <- IdsRevs],
-    case fabric:purge_docs(Db, IdsRevs2) of
-    {ok, PurgeSeq, PurgedIdsRevs} ->
-        PurgedIdsRevs2 = [{Id, couch_doc:revs_to_strs(Revs)} || {Id, Revs}
-            <- PurgedIdsRevs],
-        send_json(Req, 200, {[
-            {<<"purge_seq">>, PurgeSeq},
-            {<<"purged">>, {PurgedIdsRevs2}}
-        ]});
-    Error ->
-        throw(Error)
-    end;
-
-db_req(#httpd{path_parts=[_,<<"_purge">>]}=Req, _Db) ->
-    send_method_not_allowed(Req, "POST");
-
-db_req(#httpd{method='GET',path_parts=[_,<<"_all_docs">>]}=Req, Db) ->
-    all_docs_view(Req, Db, nil);
-
-db_req(#httpd{method='POST',path_parts=[_,<<"_all_docs">>]}=Req, Db) ->
-    {Fields} = chttpd:json_body_obj(Req),
-    case couch_util:get_value(<<"keys">>, Fields, nil) of
-    Keys when is_list(Keys) ->
-        all_docs_view(Req, Db, Keys);
-    nil ->
-        all_docs_view(Req, Db, nil);
-    _ ->
-        throw({bad_request, "`keys` body member must be an array."})
-    end;
-
-db_req(#httpd{path_parts=[_,<<"_all_docs">>]}=Req, _Db) ->
-    send_method_not_allowed(Req, "GET,HEAD,POST");
-
-db_req(#httpd{method='POST',path_parts=[_,<<"_missing_revs">>]}=Req, Db) ->
-    {JsonDocIdRevs} = couch_httpd:json_body_obj(Req),
-    {ok, Results} = fabric:get_missing_revs(Db, JsonDocIdRevs),
-    Results2 = [{Id, couch_doc:revs_to_strs(Revs)} || {Id, Revs} <- Results],
-    send_json(Req, {[
-        {missing_revs, {Results2}}
-    ]});
-
-db_req(#httpd{path_parts=[_,<<"_missing_revs">>]}=Req, _Db) ->
-    send_method_not_allowed(Req, "POST");
-
-db_req(#httpd{method='POST',path_parts=[_,<<"_revs_diff">>]}=Req, Db) ->
-    {JsonDocIdRevs} = couch_httpd:json_body_obj(Req),
-    {ok, Results} = fabric:get_missing_revs(Db, JsonDocIdRevs),
-    Results2 =
-    lists:map(fun({Id, MissingRevs, PossibleAncestors}) ->
-        {Id,
-            {[{missing, couch_doc:revs_to_strs(MissingRevs)}] ++
-                if PossibleAncestors == [] ->
-                    [];
-                true ->
-                    [{possible_ancestors,
-                        couch_doc:revs_to_strs(PossibleAncestors)}]
-                end}}
-    end, Results),
-    send_json(Req, {Results2});
-
-db_req(#httpd{path_parts=[_,<<"_revs_diff">>]}=Req, _Db) ->
-    send_method_not_allowed(Req, "POST");
-
-db_req(#httpd{method='PUT',path_parts=[_,<<"_security">>],user_ctx=Ctx}=Req,
-        Db) ->
-    SecObj = couch_httpd:json_body(Req),
-    ok = fabric:set_security(Db, SecObj, [{user_ctx,Ctx}]),
-    send_json(Req, {[{<<"ok">>, true}]});
-
-db_req(#httpd{method='GET',path_parts=[_,<<"_security">>]}=Req, Db) ->
-    send_json(Req, fabric:get_security(Db));
-
-db_req(#httpd{path_parts=[_,<<"_security">>]}=Req, _Db) ->
-    send_method_not_allowed(Req, "PUT,GET");
-
-db_req(#httpd{method='PUT',path_parts=[_,<<"_revs_limit">>],user_ctx=Ctx}=Req,
-        Db) ->
-    Limit = chttpd:json_body(Req),
-    ok = fabric:set_revs_limit(Db, Limit, [{user_ctx,Ctx}]),
-    send_json(Req, {[{<<"ok">>, true}]});
-
-db_req(#httpd{method='GET',path_parts=[_,<<"_revs_limit">>]}=Req, Db) ->
-    send_json(Req, fabric:get_revs_limit(Db));
-
-db_req(#httpd{path_parts=[_,<<"_revs_limit">>]}=Req, _Db) ->
-    send_method_not_allowed(Req, "PUT,GET");
-
-% vanilla CouchDB sends a 301 here, but we just handle the request
-db_req(#httpd{path_parts=[DbName,<<"_design/",Name/binary>>|Rest]}=Req, Db) ->
-    db_req(Req#httpd{path_parts=[DbName, <<"_design">>, Name | Rest]}, Db);
-
-% Special case to enable using an unencoded slash in the URL of design docs,
-% as slashes in document IDs must otherwise be URL encoded.
-db_req(#httpd{path_parts=[_DbName,<<"_design">>,Name]}=Req, Db) ->
-    db_doc_req(Req, Db, <<"_design/",Name/binary>>);
-
-db_req(#httpd{path_parts=[_DbName,<<"_design">>,Name|FileNameParts]}=Req, Db) ->
-    db_attachment_req(Req, Db, <<"_design/",Name/binary>>, FileNameParts);
-
-
-% Special case to allow for accessing local documents without %2F
-% encoding the docid. Throws out requests that don't have the second
-% path part or that specify an attachment name.
-db_req(#httpd{path_parts=[_DbName, <<"_local">>]}, _Db) ->
-    throw({bad_request, <<"Invalid _local document id.">>});
-
-db_req(#httpd{path_parts=[_DbName, <<"_local/">>]}, _Db) ->
-    throw({bad_request, <<"Invalid _local document id.">>});
-
-db_req(#httpd{path_parts=[_DbName, <<"_local">>, Name]}=Req, Db) ->
-    db_doc_req(Req, Db, <<"_local/", Name/binary>>);
-
-db_req(#httpd{path_parts=[_DbName, <<"_local">> | _Rest]}, _Db) ->
-    throw({bad_request, <<"_local documents do not accept attachments.">>});
-
-db_req(#httpd{path_parts=[_, DocId]}=Req, Db) ->
-    db_doc_req(Req, Db, DocId);
-
-db_req(#httpd{path_parts=[_, DocId | FileNameParts]}=Req, Db) ->
-    db_attachment_req(Req, Db, DocId, FileNameParts).
-
-all_docs_view(Req, Db, Keys) ->
-    % measure the time required to generate the etag, see if it's worth it
-    T0 = now(),
-    {ok, Info} = fabric:get_db_info(Db),
-    Etag = couch_httpd:make_etag(Info),
-    DeltaT = timer:now_diff(now(), T0) / 1000,
-    couch_stats_collector:record({couchdb, dbinfo}, DeltaT),
-    QueryArgs = chttpd_view:parse_view_params(Req, Keys, map),
-    chttpd:etag_respond(Req, Etag, fun() ->
-        {ok, Resp} = chttpd:start_json_response(Req, 200, [{"Etag",Etag}]),
-        fabric:all_docs(Db, fun all_docs_callback/2, {nil, Resp}, QueryArgs)
-    end).
-
-all_docs_callback({total_and_offset, Total, Offset}, {_, Resp}) ->
-    Chunk = "{\"total_rows\":~p,\"offset\":~p,\"rows\":[\r\n",
-    send_chunk(Resp, io_lib:format(Chunk, [Total, Offset])),
-    {ok, {"", Resp}};
-all_docs_callback({row, Row}, {Prepend, Resp}) ->
-    send_chunk(Resp, [Prepend, ?JSON_ENCODE(Row)]),
-    {ok, {",\r\n", Resp}};
-all_docs_callback(complete, {_, Resp}) ->
-    send_chunk(Resp, "\r\n]}"),
-    end_json_response(Resp);
-all_docs_callback({error, Reason}, {_, Resp}) ->
-    chttpd:send_chunked_error(Resp, {error, Reason}).
-
-db_doc_req(#httpd{method='DELETE'}=Req, Db, DocId) ->
-    % check for the existence of the doc to handle the 404 case.
-    couch_doc_open(Db, DocId, nil, []),
-    case chttpd:qs_value(Req, "rev") of
-    undefined ->
-        Body = {[{<<"_deleted">>,true}]};
-    Rev ->
-        Body = {[{<<"_rev">>, ?l2b(Rev)},{<<"_deleted">>,true}]}
-    end,
-    update_doc(Req, Db, DocId, couch_doc_from_req(Req, DocId, Body));
-
-db_doc_req(#httpd{method='GET'}=Req, Db, DocId) ->
-    #doc_query_args{
-        rev = Rev,
-        open_revs = Revs,
-        options = Options,
-        atts_since = AttsSince
-    } = parse_doc_query(Req),
-    case Revs of
-    [] ->
-        Options2 =
-        if AttsSince /= nil ->
-            [{atts_since, AttsSince}, attachments | Options];
-        true -> Options
-        end,
-        Doc = couch_doc_open(Db, DocId, Rev, Options2),
-        send_doc(Req, Doc, Options2);
-    _ ->
-        {ok, Results} = fabric:open_revs(Db, DocId, Revs, Options),
-        AcceptedTypes = case couch_httpd:header_value(Req, "Accept") of
-            undefined       -> [];
-            AcceptHeader    -> string:tokens(AcceptHeader, "; ")
-        end,
-        case lists:member("multipart/mixed", AcceptedTypes) of
-        false ->
-            {ok, Resp} = start_json_response(Req, 200),
-            send_chunk(Resp, "["),
-            % We loop through the docs. The first time through the separator
-            % is whitespace, then a comma on subsequent iterations.
-            lists:foldl(
-                fun(Result, AccSeparator) ->
-                    case Result of
-                    {ok, Doc} ->
-                        JsonDoc = couch_doc:to_json_obj(Doc, Options),
-                        Json = ?JSON_ENCODE({[{ok, JsonDoc}]}),
-                        send_chunk(Resp, AccSeparator ++ Json);
-                    {{not_found, missing}, RevId} ->
-                        RevStr = couch_doc:rev_to_str(RevId),
-                        Json = ?JSON_ENCODE({[{"missing", RevStr}]}),
-                        send_chunk(Resp, AccSeparator ++ Json)
-                    end,
-                    "," % AccSeparator now has a comma
-                end,
-                "", Results),
-            send_chunk(Resp, "]"),
-            end_json_response(Resp);
-        true ->
-            send_docs_multipart(Req, Results, Options)
-        end
-    end;
-
-db_doc_req(#httpd{method='POST', user_ctx=Ctx}=Req, Db, DocId) ->
-    couch_httpd:validate_referer(Req),
-    couch_doc:validate_docid(DocId),
-    couch_httpd:validate_ctype(Req, "multipart/form-data"),
-    Form = couch_httpd:parse_form(Req),
-    case proplists:is_defined("_doc", Form) of
-    true ->
-        Json = ?JSON_DECODE(couch_util:get_value("_doc", Form)),
-        Doc = couch_doc_from_req(Req, DocId, Json);
-    false ->
-        Rev = couch_doc:parse_rev(list_to_binary(couch_util:get_value("_rev", Form))),
-        {ok, [{ok, Doc}]} = fabric:open_revs(Db, DocId, [Rev], [])
-    end,
-    UpdatedAtts = [
-        #att{name=validate_attachment_name(Name),
-            type=list_to_binary(ContentType),
-            data=Content} ||
-        {Name, {ContentType, _}, Content} <-
-        proplists:get_all_values("_attachments", Form)
-    ],
-    #doc{atts=OldAtts} = Doc,
-    OldAtts2 = lists:flatmap(
-        fun(#att{name=OldName}=Att) ->
-            case [1 || A <- UpdatedAtts, A#att.name == OldName] of
-            [] -> [Att]; % the attachment wasn't in the UpdatedAtts, return it
-            _ -> [] % the attachment was in the UpdatedAtts, drop it
-            end
-        end, OldAtts),
-    NewDoc = Doc#doc{
-        atts = UpdatedAtts ++ OldAtts2
-    },
-    {ok, NewRev} = fabric:update_doc(Db, NewDoc, [{user_ctx,Ctx}]),
-
-    send_json(Req, 201, [{"Etag", "\"" ++ ?b2l(couch_doc:rev_to_str(NewRev)) ++ "\""}], {[
-        {ok, true},
-        {id, DocId},
-        {rev, couch_doc:rev_to_str(NewRev)}
-    ]});
-
-db_doc_req(#httpd{method='PUT', user_ctx=Ctx}=Req, Db, DocId) ->
-    #doc_query_args{
-        update_type = UpdateType
-    } = parse_doc_query(Req),
-    couch_doc:validate_docid(DocId),
-
-    W = couch_httpd:qs_value(Req, "w", couch_config:get("cluster", "w", "2")),
-    Options = [{user_ctx,Ctx}, {w,W}],
-
-    Loc = absolute_uri(Req, [$/, Db#db.name, $/, DocId]),
-    RespHeaders = [{"Location", Loc}],
-    case couch_util:to_list(couch_httpd:header_value(Req, "Content-Type")) of
-    ("multipart/related;" ++ _) = ContentType ->
-        {ok, Doc0} = couch_doc:doc_from_multi_part_stream(ContentType,
-                fun() -> receive_request_data(Req) end),
-        Doc = couch_doc_from_req(Req, DocId, Doc0),
-        update_doc(Req, Db, DocId, Doc, RespHeaders, UpdateType);
-    _Else ->
-        case couch_httpd:qs_value(Req, "batch") of
-        "ok" ->
-            % batch
-            Doc = couch_doc_from_req(Req, DocId, couch_httpd:json_body(Req)),
-
-            spawn(fun() ->
-                    case catch(fabric:update_doc(Db, Doc, Options)) of
-                    {ok, _} -> ok;
-                    Error ->
-                        ?LOG_INFO("Batch doc error (~s): ~p",[DocId, Error])
-                    end
-                end),
-            send_json(Req, 202, [], {[
-                {ok, true},
-                {id, DocId}
-            ]});
-        _Normal ->
-            % normal
-            Body = couch_httpd:json_body(Req),
-            Doc = couch_doc_from_req(Req, DocId, Body),
-            update_doc(Req, Db, DocId, Doc, RespHeaders, UpdateType)
-        end
-    end;
-
-db_doc_req(#httpd{method='COPY', user_ctx=Ctx}=Req, Db, SourceDocId) ->
-    SourceRev =
-    case extract_header_rev(Req, couch_httpd:qs_value(Req, "rev")) of
-        missing_rev -> nil;
-        Rev -> Rev
-    end,
-    {TargetDocId, TargetRevs} = parse_copy_destination_header(Req),
-    % open old doc
-    Doc = couch_doc_open(Db, SourceDocId, SourceRev, []),
-    % save new doc
-    {ok, NewTargetRev} = fabric:update_doc(Db,
-        Doc#doc{id=TargetDocId, revs=TargetRevs}, [{user_ctx,Ctx}]),
-    % respond
-    send_json(Req, 201,
-        [{"Etag", "\"" ++ ?b2l(couch_doc:rev_to_str(NewTargetRev)) ++ "\""}],
-        update_doc_result_to_json(TargetDocId, {ok, NewTargetRev}));
-
-db_doc_req(Req, _Db, _DocId) ->
-    send_method_not_allowed(Req, "DELETE,GET,HEAD,POST,PUT,COPY").
-
-send_doc(Req, Doc, Options) ->
-    case Doc#doc.meta of
-    [] ->
-        DiskEtag = couch_httpd:doc_etag(Doc),
-        % output etag only when we have no meta
-        couch_httpd:etag_respond(Req, DiskEtag, fun() ->
-            send_doc_efficiently(Req, Doc, [{"Etag", DiskEtag}], Options)
-        end);
-    _ ->
-        send_doc_efficiently(Req, Doc, [], Options)
-    end.
-
-send_doc_efficiently(Req, #doc{atts=[]}=Doc, Headers, Options) ->
-        send_json(Req, 200, Headers, couch_doc:to_json_obj(Doc, Options));
-send_doc_efficiently(Req, #doc{atts=Atts}=Doc, Headers, Options) ->
-    case lists:member(attachments, Options) of
-    true ->
-        AcceptedTypes = case couch_httpd:header_value(Req, "Accept") of
-            undefined       -> [];
-            AcceptHeader    -> string:tokens(AcceptHeader, ", ")
-        end,
-        case lists:member("multipart/related", AcceptedTypes) of
-        false ->
-            send_json(Req, 200, Headers, couch_doc:to_json_obj(Doc, Options));
-        true ->
-            Boundary = couch_uuids:random(),
-            JsonBytes = ?JSON_ENCODE(couch_doc:to_json_obj(Doc,
-                    [attachments, follows|Options])),
-            {ContentType, Len} = couch_doc:len_doc_to_multi_part_stream(
-                    Boundary,JsonBytes, Atts,false),
-            CType = {<<"Content-Type">>, ContentType},
-            {ok, Resp} = start_response_length(Req, 200, [CType|Headers], Len),
-            couch_doc:doc_to_multi_part_stream(Boundary,JsonBytes,Atts,
-                    fun(Data) -> couch_httpd:send(Resp, Data) end, false)
-        end;
-    false ->
-        send_json(Req, 200, Headers, couch_doc:to_json_obj(Doc, Options))
-    end.
-
-send_docs_multipart(Req, Results, Options) ->
-    OuterBoundary = couch_uuids:random(),
-    InnerBoundary = couch_uuids:random(),
-    CType = {"Content-Type",
-        "multipart/mixed; boundary=\"" ++ ?b2l(OuterBoundary) ++ "\""},
-    {ok, Resp} = start_chunked_response(Req, 200, [CType]),
-    couch_httpd:send_chunk(Resp, <<"--", OuterBoundary/binary>>),
-    lists:foreach(
-        fun({ok, #doc{atts=Atts}=Doc}) ->
-            JsonBytes = ?JSON_ENCODE(couch_doc:to_json_obj(Doc,
-                    [attachments,follows|Options])),
-            {ContentType, _Len} = couch_doc:len_doc_to_multi_part_stream(
-                    InnerBoundary, JsonBytes, Atts, false),
-            couch_httpd:send_chunk(Resp, <<"\r\nContent-Type: ",
-                    ContentType/binary, "\r\n\r\n">>),
-            couch_doc:doc_to_multi_part_stream(InnerBoundary, JsonBytes, Atts,
-                    fun(Data) -> couch_httpd:send_chunk(Resp, Data)
-                    end, false),
-             couch_httpd:send_chunk(Resp, <<"\r\n--", OuterBoundary/binary>>);
-        ({{not_found, missing}, RevId}) ->
-             RevStr = couch_doc:rev_to_str(RevId),
-             Json = ?JSON_ENCODE({[{"missing", RevStr}]}),
-             couch_httpd:send_chunk(Resp,
-                [<<"\r\nContent-Type: application/json; error=\"true\"\r\n\r\n">>,
-                Json,
-                <<"\r\n--", OuterBoundary/binary>>])
-         end, Results),
-    couch_httpd:send_chunk(Resp, <<"--">>),
-    couch_httpd:last_chunk(Resp).
-
-receive_request_data(Req) ->
-    {couch_httpd:recv(Req, 0), fun() -> receive_request_data(Req) end}.
-
-update_doc_result_to_json({{Id, Rev}, Error}) ->
-        {_Code, Err, Msg} = chttpd:error_info(Error),
-        {[{id, Id}, {rev, couch_doc:rev_to_str(Rev)},
-            {error, Err}, {reason, Msg}]}.
-
-update_doc_result_to_json(#doc{id=DocId}, Result) ->
-    update_doc_result_to_json(DocId, Result);
-update_doc_result_to_json(DocId, {ok, NewRev}) ->
-    {[{id, DocId}, {rev, couch_doc:rev_to_str(NewRev)}]};
-update_doc_result_to_json(DocId, Error) ->
-    {_Code, ErrorStr, Reason} = chttpd:error_info(Error),
-    {[{id, DocId}, {error, ErrorStr}, {reason, Reason}]}.
-
-
-update_doc(Req, Db, DocId, Json) ->
-    update_doc(Req, Db, DocId, Json, []).
-
-update_doc(Req, Db, DocId, Doc, Headers) ->
-    update_doc(Req, Db, DocId, Doc, Headers, interactive_edit).
-
-update_doc(#httpd{user_ctx=Ctx} = Req, Db, DocId, #doc{deleted=Deleted}=Doc,
-        Headers, UpdateType) ->
-    W = couch_httpd:qs_value(Req, "w", couch_config:get("cluster", "w", "2")),
-    case couch_httpd:header_value(Req, "X-Couch-Full-Commit") of
-    "true" ->
-        Options = [full_commit, UpdateType, {user_ctx,Ctx}, {w,W}];
-    "false" ->
-        Options = [delay_commit, UpdateType, {user_ctx,Ctx}, {w,W}];
-    _ ->
-        Options = [UpdateType, {user_ctx,Ctx}, {w,W}]
-    end,
-    {ok, NewRev} = fabric:update_doc(Db, Doc, Options),
-    NewRevStr = couch_doc:rev_to_str(NewRev),
-    ResponseHeaders = [{"Etag", <<"\"", NewRevStr/binary, "\"">>} | Headers],
-    send_json(Req, if Deleted -> 200; true -> 201 end, ResponseHeaders, {[
-        {ok, true},
-        {id, DocId},
-        {rev, NewRevStr}
-    ]}).
-
-couch_doc_from_req(Req, DocId, #doc{revs=Revs} = Doc) ->
-    validate_attachment_names(Doc),
-    ExplicitDocRev =
-    case Revs of
-        {Start,[RevId|_]} -> {Start, RevId};
-        _ -> undefined
-    end,
-    case extract_header_rev(Req, ExplicitDocRev) of
-    missing_rev ->
-        Revs2 = {0, []};
-    ExplicitDocRev ->
-        Revs2 = Revs;
-    {Pos, Rev} ->
-        Revs2 = {Pos, [Rev]}
-    end,
-    Doc#doc{id=DocId, revs=Revs2};
-couch_doc_from_req(Req, DocId, Json) ->
-    couch_doc_from_req(Req, DocId, couch_doc:from_json_obj(Json)).
-
-
-% Useful for debugging
-% couch_doc_open(Db, DocId) ->
-%   couch_doc_open(Db, DocId, nil, []).
-
-couch_doc_open(Db, DocId, Rev, Options) ->
-    case Rev of
-    nil -> % open most recent rev
-        case fabric:open_doc(Db, DocId, Options) of
-        {ok, Doc} ->
-            Doc;
-         Error ->
-             throw(Error)
-         end;
-  _ -> % open a specific rev (deletions come back as stubs)
-      case fabric:open_revs(Db, DocId, [Rev], Options) of
-          {ok, [{ok, Doc}]} ->
-              Doc;
-          {ok, [{{not_found, missing}, Rev}]} ->
-              throw(not_found);
-          {ok, [Else]} ->
-              throw(Else)
-      end
-  end.
-
-% Attachment request handlers
-
-db_attachment_req(#httpd{method='GET'}=Req, Db, DocId, FileNameParts) ->
-    FileName = list_to_binary(mochiweb_util:join(lists:map(fun binary_to_list/1,
-        FileNameParts),"/")),
-    #doc_query_args{
-        rev=Rev,
-        options=Options
-    } = parse_doc_query(Req),
-    #doc{
-        atts=Atts
-    } = Doc = couch_doc_open(Db, DocId, Rev, Options),
-    case [A || A <- Atts, A#att.name == FileName] of
-    [] ->
-        throw({not_found, "Document is missing attachment"});
-    [#att{type=Type, encoding=Enc, disk_len=DiskLen, att_len=AttLen}=Att] ->
-        Etag = chttpd:doc_etag(Doc),
-        ReqAcceptsAttEnc = lists:member(
-           atom_to_list(Enc),
-           couch_httpd:accepted_encodings(Req)
-        ),
-        Headers = [
-            {"ETag", Etag},
-            {"Cache-Control", "must-revalidate"},
-            {"Content-Type", binary_to_list(Type)}
-        ] ++ case ReqAcceptsAttEnc of
-        true ->
-            [{"Content-Encoding", atom_to_list(Enc)}];
-        _ ->
-            []
-        end,
-        Len = case {Enc, ReqAcceptsAttEnc} of
-        {identity, _} ->
-            % stored and served in identity form
-            DiskLen;
-        {_, false} when DiskLen =/= AttLen ->
-            % Stored encoded, but client doesn't accept the encoding we used,
-            % so we need to decode on the fly.  DiskLen is the identity length
-            % of the attachment.
-            DiskLen;
-        {_, true} ->
-            % Stored and served encoded.  AttLen is the encoded length.
-            AttLen;
-        _ ->
-            % We received an encoded attachment and stored it as such, so we
-            % don't know the identity length.  The client doesn't accept the
-            % encoding, and since we cannot serve a correct Content-Length
-            % header we'll fall back to a chunked response.
-            undefined
-        end,
-        AttFun = case ReqAcceptsAttEnc of
-        false ->
-            fun couch_doc:att_foldl_decode/3;
-        true ->
-            fun couch_doc:att_foldl/3
-        end,
-        couch_httpd:etag_respond(
-            Req,
-            Etag,
-            fun() ->
-                case Len of
-                undefined ->
-                    {ok, Resp} = start_chunked_response(Req, 200, Headers),
-                    AttFun(Att, fun(Seg, _) -> send_chunk(Resp, Seg) end, ok),
-                    couch_httpd:last_chunk(Resp);
-                _ ->
-                    {ok, Resp} = start_response_length(Req, 200, Headers, Len),
-                    AttFun(Att, fun(Seg, _) -> send(Resp, Seg) end, ok)
-                end
-            end
-        )
-    end;
-
-
-db_attachment_req(#httpd{method=Method, user_ctx=Ctx}=Req, Db, DocId, FileNameParts)
-        when (Method == 'PUT') or (Method == 'DELETE') ->
-    FileName = validate_attachment_name(
-                    mochiweb_util:join(
-                        lists:map(fun binary_to_list/1,
-                            FileNameParts),"/")),
-
-    NewAtt = case Method of
-        'DELETE' ->
-            [];
-        _ ->
-            [#att{
-                name=FileName,
-                type = case couch_httpd:header_value(Req,"Content-Type") of
-                    undefined ->
-                        % We could throw an error here or guess by the FileName.
-                        % Currently, just giving it a default.
-                        <<"application/octet-stream">>;
-                    CType ->
-                        list_to_binary(CType)
-                    end,
-                data = fabric:att_receiver(Req, chttpd:body_length(Req)),
-                att_len = case couch_httpd:header_value(Req,"Content-Length") of
-                    undefined ->
-                        undefined;
-                    Length ->
-                        list_to_integer(Length)
-                    end,
-                md5 = get_md5_header(Req),
-                encoding = case string:to_lower(string:strip(
-                    couch_httpd:header_value(Req,"Content-Encoding","identity")
-                )) of
-                "identity" ->
-                   identity;
-                "gzip" ->
-                   gzip;
-                _ ->
-                   throw({
-                       bad_ctype,
-                       "Only gzip and identity content-encodings are supported"
-                   })
-                end
-            }]
-    end,
-
-    Doc = case extract_header_rev(Req, couch_httpd:qs_value(Req, "rev")) of
-        missing_rev -> % make the new doc
-            couch_doc:validate_docid(DocId),
-            #doc{id=DocId};
-        Rev ->
-            case fabric:open_revs(Db, DocId, [Rev], []) of
-            {ok, [{ok, Doc0}]}  -> Doc0;
-            {ok, [Error]}       -> throw(Error)
-            end
-    end,
-
-    #doc{atts=Atts} = Doc,
-    DocEdited = Doc#doc{
-        atts = NewAtt ++ [A || A <- Atts, A#att.name /= FileName]
-    },
-    {ok, UpdatedRev} = fabric:update_doc(Db, DocEdited, [{user_ctx,Ctx}]),
-    #db{name=DbName} = Db,
-
-    {Status, Headers} = case Method of
-        'DELETE' ->
-            {200, []};
-        _ ->
-            {201, [{"Location", absolute_uri(Req, [$/, DbName, $/, DocId, $/,
-                FileName])}]}
-        end,
-    send_json(Req,Status, Headers, {[
-        {ok, true},
-        {id, DocId},
-        {rev, couch_doc:rev_to_str(UpdatedRev)}
-    ]});
-
-db_attachment_req(Req, _Db, _DocId, _FileNameParts) ->
-    send_method_not_allowed(Req, "DELETE,GET,HEAD,PUT").
-
-get_md5_header(Req) ->
-    ContentMD5 = couch_httpd:header_value(Req, "Content-MD5"),
-    Length = couch_httpd:body_length(Req),
-    Trailer = couch_httpd:header_value(Req, "Trailer"),
-    case {ContentMD5, Length, Trailer} of
-        _ when is_list(ContentMD5) orelse is_binary(ContentMD5) ->
-            base64:decode(ContentMD5);
-        {_, chunked, undefined} ->
-            <<>>;
-        {_, chunked, _} ->
-            case re:run(Trailer, "\\bContent-MD5\\b", [caseless]) of
-                {match, _} ->
-                    md5_in_footer;
-                _ ->
-                    <<>>
-            end;
-        _ ->
-            <<>>
-    end.
-
-parse_doc_query(Req) ->
-    lists:foldl(fun({Key,Value}, Args) ->
-        case {Key, Value} of
-        {"attachments", "true"} ->
-            Options = [attachments | Args#doc_query_args.options],
-            Args#doc_query_args{options=Options};
-        {"meta", "true"} ->
-            Options = [revs_info, conflicts, deleted_conflicts | Args#doc_query_args.options],
-            Args#doc_query_args{options=Options};
-        {"revs", "true"} ->
-            Options = [revs | Args#doc_query_args.options],
-            Args#doc_query_args{options=Options};
-        {"local_seq", "true"} ->
-            Options = [local_seq | Args#doc_query_args.options],
-            Args#doc_query_args{options=Options};
-        {"revs_info", "true"} ->
-            Options = [revs_info | Args#doc_query_args.options],
-            Args#doc_query_args{options=Options};
-        {"conflicts", "true"} ->
-            Options = [conflicts | Args#doc_query_args.options],
-            Args#doc_query_args{options=Options};
-        {"deleted_conflicts", "true"} ->
-            Options = [deleted_conflicts | Args#doc_query_args.options],
-            Args#doc_query_args{options=Options};
-        {"rev", Rev} ->
-            Args#doc_query_args{rev=couch_doc:parse_rev(Rev)};
-        {"open_revs", "all"} ->
-            Args#doc_query_args{open_revs=all};
-        {"open_revs", RevsJsonStr} ->
-            JsonArray = ?JSON_DECODE(RevsJsonStr),
-            Args#doc_query_args{open_revs=[couch_doc:parse_rev(Rev) || Rev <- JsonArray]};
-        {"atts_since", RevsJsonStr} ->
-            JsonArray = ?JSON_DECODE(RevsJsonStr),
-            Args#doc_query_args{atts_since = couch_doc:parse_revs(JsonArray)};
-        {"new_edits", "false"} ->
-            Args#doc_query_args{update_type=replicated_changes};
-        {"new_edits", "true"} ->
-            Args#doc_query_args{update_type=interactive_edit};
-        {"att_encoding_info", "true"} ->
-            Options = [att_encoding_info | Args#doc_query_args.options],
-            Args#doc_query_args{options=Options};
-        {"r", R} ->
-            Options = [{r,R} | Args#doc_query_args.options],
-            Args#doc_query_args{options=Options};
-        {"w", W} ->
-            Options = [{w,W} | Args#doc_query_args.options],
-            Args#doc_query_args{options=Options};
-        _Else -> % unknown key value pair, ignore.
-            Args
-        end
-    end, #doc_query_args{}, chttpd:qs(Req)).
-
-parse_changes_query(Req) ->
-    lists:foldl(fun({Key, Value}, Args) ->
-        case {Key, Value} of
-        {"feed", _} ->
-            Args#changes_args{feed=Value};
-        {"descending", "true"} ->
-            Args#changes_args{dir=rev};
-        {"since", _} ->
-            Args#changes_args{since=Value};
-        {"limit", _} ->
-            Args#changes_args{limit=list_to_integer(Value)};
-        {"style", _} ->
-            Args#changes_args{style=list_to_existing_atom(Value)};
-        {"heartbeat", "true"} ->
-            Args#changes_args{heartbeat=true};
-        {"heartbeat", _} ->
-            Args#changes_args{heartbeat=list_to_integer(Value)};
-        {"timeout", _} ->
-            Args#changes_args{timeout=list_to_integer(Value)};
-        {"include_docs", "true"} ->
-            Args#changes_args{include_docs=true};
-        {"filter", _} ->
-            Args#changes_args{filter=Value};
-        _Else -> % unknown key value pair, ignore.
-            Args
-        end
-    end, #changes_args{}, couch_httpd:qs(Req)).
-
-extract_header_rev(Req, ExplicitRev) when is_binary(ExplicitRev) or is_list(ExplicitRev)->
-    extract_header_rev(Req, couch_doc:parse_rev(ExplicitRev));
-extract_header_rev(Req, ExplicitRev) ->
-    Etag = case chttpd:header_value(Req, "If-Match") of
-        undefined -> undefined;
-        Value -> couch_doc:parse_rev(string:strip(Value, both, $"))
-    end,
-    case {ExplicitRev, Etag} of
-    {undefined, undefined} -> missing_rev;
-    {_, undefined} -> ExplicitRev;
-    {undefined, _} -> Etag;
-    _ when ExplicitRev == Etag -> Etag;
-    _ ->
-        throw({bad_request, "Document rev and etag have different values"})
-    end.
-
-
-parse_copy_destination_header(Req) ->
-    Destination = chttpd:header_value(Req, "Destination"),
-    case re:run(Destination, "\\?", [{capture, none}]) of
-    nomatch ->
-        {list_to_binary(Destination), {0, []}};
-    match ->
-        [DocId, RevQs] = re:split(Destination, "\\?", [{return, list}]),
-        [_RevQueryKey, Rev] = re:split(RevQs, "=", [{return, list}]),
-        {Pos, RevId} = couch_doc:parse_rev(Rev),
-        {list_to_binary(DocId), {Pos, [RevId]}}
-    end.
-
-validate_attachment_names(Doc) ->
-    lists:foreach(fun(#att{name=Name}) ->
-        validate_attachment_name(Name)
-    end, Doc#doc.atts).
-
-validate_attachment_name(Name) when is_list(Name) ->
-    validate_attachment_name(list_to_binary(Name));
-validate_attachment_name(<<"_",_/binary>>) ->
-    throw({bad_request, <<"Attachment name can't start with '_'">>});
-validate_attachment_name(Name) ->
-    case is_valid_utf8(Name) of
-        true -> Name;
-        false -> throw({bad_request, <<"Attachment name is not UTF-8 encoded">>})
-    end.
-
-%% borrowed from mochijson2:json_bin_is_safe()
-is_valid_utf8(<<>>) ->
-    true;
-is_valid_utf8(<<C, Rest/binary>>) ->
-    case C of
-        $\" ->
-            false;
-        $\\ ->
-            false;
-        $\b ->
-            false;
-        $\f ->
-            false;
-        $\n ->
-            false;
-        $\r ->
-            false;
-        $\t ->
-            false;
-        C when C >= 0, C < $\s; C >= 16#7f, C =< 16#10FFFF ->
-            false;
-        C when C < 16#7f ->
-            is_valid_utf8(Rest);
-        _ ->
-            false
-    end.