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% 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(couch_httpd_misc_handlers).
-export([handle_welcome_req/2,handle_utils_dir_req/2,handle_all_dbs_req/1,
handle_replicate_req/1,handle_restart_req/1,handle_uuids_req/1,
handle_config_req/1]).
-export([increment_update_seq_req/2]).
-include("couch_db.hrl").
-import(couch_httpd,
[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]).
% httpd global handlers
handle_welcome_req(#httpd{method='GET'}=Req, WelcomeMessage) ->
send_json(Req, {[
{couchdb, WelcomeMessage},
{version, list_to_binary(couch_server:get_version())}
]});
handle_welcome_req(Req, _) ->
send_method_not_allowed(Req, "GET,HEAD").
handle_utils_dir_req(#httpd{method='GET'}=Req, DocumentRoot) ->
"/" ++ UrlPath = couch_httpd:path(Req),
case couch_httpd:partition(UrlPath) of
{_ActionKey, "/", RelativePath} ->
% GET /_utils/path or GET /_utils/
couch_httpd:serve_file(Req, RelativePath, DocumentRoot);
{_ActionKey, "", _RelativePath} ->
% GET /_utils
couch_httpd:send_response(Req, 301, [{"Location", "/_utils/"}], <<>>)
end;
handle_utils_dir_req(Req, _) ->
send_method_not_allowed(Req, "GET,HEAD").
handle_all_dbs_req(#httpd{method='GET'}=Req) ->
{ok, DbNames} = couch_server:all_databases(),
send_json(Req, DbNames);
handle_all_dbs_req(Req) ->
send_method_not_allowed(Req, "GET,HEAD").
handle_replicate_req(#httpd{method='POST'}=Req) ->
{Props} = couch_httpd:json_body(Req),
Source = proplists:get_value(<<"source">>, Props),
Target = proplists:get_value(<<"target">>, Props),
{Options} = proplists:get_value(<<"options">>, Props, {[]}),
{ok, {JsonResults}} = couch_rep:replicate(Source, Target, Options),
send_json(Req, {[{ok, true} | JsonResults]});
handle_replicate_req(Req) ->
send_method_not_allowed(Req, "POST").
handle_restart_req(#httpd{method='POST'}=Req) ->
Response = send_json(Req, {[{ok, true}]}),
spawn(fun() -> couch_server:remote_restart() end),
Response;
handle_restart_req(Req) ->
send_method_not_allowed(Req, "POST").
handle_uuids_req(#httpd{method='POST'}=Req) ->
Count = list_to_integer(couch_httpd:qs_value(Req, "count", "1")),
% generate the uuids
UUIDs = [ couch_util:new_uuid() || _ <- lists:seq(1,Count)],
% send a JSON response
send_json(Req, {[{"uuids", UUIDs}]});
handle_uuids_req(Req) ->
send_method_not_allowed(Req, "POST").
% Config request handler
% GET /_config/
% GET /_config
handle_config_req(#httpd{method='GET', path_parts=[_]}=Req) ->
Grouped = lists:foldl(fun({{Section, Key}, Value}, Acc) ->
case dict:is_key(Section, Acc) of
true ->
dict:append(Section, {list_to_binary(Key), list_to_binary(Value)}, Acc);
false ->
dict:store(Section, [{list_to_binary(Key), list_to_binary(Value)}], Acc)
end
end, dict:new(), couch_config:all()),
KVs = dict:fold(fun(Section, Values, Acc) ->
[{list_to_binary(Section), {Values}} | Acc]
end, [], Grouped),
send_json(Req, 200, {KVs});
% GET /_config/Section
handle_config_req(#httpd{method='GET', path_parts=[_,Section]}=Req) ->
KVs = [{list_to_binary(Key), list_to_binary(Value)}
|| {Key, Value} <- couch_config:get(Section)],
send_json(Req, 200, {KVs});
% PUT /_config/Section/Key
% "value"
handle_config_req(#httpd{method='PUT', path_parts=[_, Section, Key]}=Req) ->
Value = binary_to_list(couch_httpd:body(Req)),
ok = couch_config:set(Section, Key, Value),
send_json(Req, 200, {[
{ok, true}
]});
% GET /_config/Section/Key
handle_config_req(#httpd{method='GET', path_parts=[_, Section, Key]}=Req) ->
case couch_config:get(Section, Key, null) of
null ->
throw({not_found, unknown_config_value});
Value ->
send_json(Req, 200, list_to_binary(Value))
end;
% DELETE /_config/Section/Key
handle_config_req(#httpd{method='DELETE',path_parts=[_,Section,Key]}=Req) ->
case couch_config:get(Section, Key, null) of
null ->
throw({not_found, unknown_config_value});
OldValue ->
couch_config:delete(Section, Key),
send_json(Req, 200, list_to_binary(OldValue))
end;
handle_config_req(Req) ->
send_method_not_allowed(Req, "GET,PUT,DELETE").
% httpd db handlers
increment_update_seq_req(#httpd{method='POST'}=Req, Db) ->
{ok, NewSeq} = couch_db:increment_update_seq(Db),
send_json(Req, {[{ok, true},
{update_seq, NewSeq}
]});
increment_update_seq_req(Req, _Db) ->
send_method_not_allowed(Req, "GET,PUT,DELETE").
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