Merge with emqx

src/emqx_rest_api.erl.bk

@@ -1,551 +0,0 @@
-%%--------------------------------------------------------------------
-%% Copyright (c) 2013-2017 EMQ Enterprise, Inc. (http://emqtt.io)
-%%
-%% 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 (emqx_rest_api).
-
--include("emqx.hrl").
-
--include("emqx_rest.hrl").
-
--http_api({"^nodes/(.+?)/alarms/?$", 'GET', alarm_list, []}).
-
--http_api({"^nodes/(.+?)/clients/?$", 'GET', client_list, []}).
--http_api({"^nodes/(.+?)/clients/(.+?)/?$", 'GET',client_list, []}).
--http_api({"^clients/(.+?)/?$", 'GET', client, []}).
--http_api({"^clients/(.+?)/?$", 'DELETE', kick_client, []}).
--http_api({"^clients/(.+?)/clean_acl_cache?$", 'PUT', clean_acl_cache, [{<<"topic">>, binary}]}).
-
--http_api({"^routes?$", 'GET', route_list, []}).
--http_api({"^routes/(.+?)/?$", 'GET', route, []}).
-
--http_api({"^nodes/(.+?)/sessions/?$", 'GET', session_list, []}).
--http_api({"^nodes/(.+?)/sessions/(.+?)/?$", 'GET', session_list, []}).
--http_api({"^sessions/(.+?)/?$", 'GET', session, []}).
-
--http_api({"^nodes/(.+?)/subscriptions/?$", 'GET', subscription_list, []}).
--http_api({"^nodes/(.+?)/subscriptions/(.+?)/?$", 'GET', subscription_list, []}).
--http_api({"^subscriptions/(.+?)/?$", 'GET', subscription, []}).
-
--http_api({"^mqtt/publish?$", 'POST', publish, [{<<"topic">>, binary}]}).
--http_api({"^mqtt/subscribe?$", 'POST', subscribe, [{<<"client_id">>, binary},{<<"topic">>, binary}]}).
--http_api({"^mqtt/unsubscribe?$", 'POST', unsubscribe, [{<<"client_id">>, binary},{<<"topic">>, binary}]}).
-
--http_api({"^management/nodes/?$", 'GET', brokers, []}).
--http_api({"^management/nodes/(.+?)/?$", 'GET', broker, []}).
--http_api({"^monitoring/nodes/?$", 'GET', nodes, []}).
--http_api({"^monitoring/nodes/(.+?)/?$", 'GET', node, []}).
--http_api({"^monitoring/listeners/?$", 'GET', listeners, []}).
--http_api({"^monitoring/listeners/(.+?)/?$", 'GET', listener, []}).
--http_api({"^monitoring/metrics/?$", 'GET', metrics, []}).
--http_api({"^monitoring/metrics/(.+?)/?$", 'GET', metric, []}).
--http_api({"^monitoring/stats/?$", 'GET', stats, []}).
--http_api({"^monitoring/stats/(.+?)/?$", 'GET', stat, []}).
-
--http_api({"^nodes/(.+?)/plugins/?$", 'GET', plugin_list, []}).
--http_api({"^nodes/(.+?)/plugins/(.+?)/?$", 'PUT', enabled, [{<<"active">>, bool}]}).
-
--http_api({"^configs/(.+?)/?$", 'PUT', modify_config, [{<<"key">>, binary}, {<<"value">>, binary}]}).
--http_api({"^configs/?$", 'GET', config_list, []}).
--http_api({"^nodes/(.+?)/configs/(.+?)/?$", 'PUT', modify_config, [{<<"key">>, binary}, {<<"value">>, binary}]}).
--http_api({"^nodes/(.+?)/configs/?$", 'GET', config_list, []}).
--http_api({"^nodes/(.+?)/plugin_configs/(.+?)/?$", 'GET', plugin_config_list, []}).
--http_api({"^nodes/(.+?)/plugin_configs/(.+?)/?$", 'PUT', modify_plugin_config, []}).
-
--http_api({"^users/?$", 'GET', users, []}).
--http_api({"^users/?$", 'POST', users, [{<<"username">>, binary},
-                                        {<<"password">>, binary},
-                                        {<<"tags">>, binary}]}).
--http_api({"^users/(.+?)/?$", 'GET', users, []}).
--http_api({"^users/(.+?)/?$", 'PUT', users, [{<<"tags">>, binary}]}).
--http_api({"^users/(.+?)/?$", 'DELETE', users, []}).
-
--http_api({"^auth/?$", 'POST', auth, [{<<"username">>, binary}, {<<"password">>, binary}]}).
--http_api({"^change_pwd/(.+?)/?$", 'PUT', change_pwd, [{<<"old_pwd">>, binary},
-                                                       {<<"new_pwd">>, binary}]}).
-
--import(proplists, [get_value/2, get_value/3]).
-
--export([alarm_list/3]).
--export([client/3, client_list/3, client_list/4, kick_client/3, clean_acl_cache/3]).
--export([route/3, route_list/2]).
--export([session/3, session_list/3, session_list/4]).
--export([subscription/3, subscription_list/3, subscription_list/4]).
--export([nodes/2, node/3, brokers/2, broker/3, listeners/2, listener/3, metrics/2, metric/3, stats/2, stat/3]).
--export([publish/2, subscribe/2, unsubscribe/2]).
--export([plugin_list/3, enabled/4]).
--export([modify_config/3, modify_config/4, config_list/2, config_list/3,
-         plugin_config_list/4, modify_plugin_config/4]).
-
--export([users/2,users/3, auth/2, change_pwd/3]).
-
-%%--------------------------------------------------------------------------
-%% alarm
-%%--------------------------------------------------------------------------
-alarm_list('GET', _Req, _Node) ->
-    Alarms = emqx_mgmt:alarm_list(),
-    {ok, lists:map(fun alarm_row/1, Alarms)}.
-
-alarm_row(#mqtt_alarm{id        = AlarmId,
-                      severity  = Severity,
-                      title     = Title,
-                      summary   = Summary,
-                      timestamp = Timestamp}) ->
-    [{id, AlarmId},
-     {severity, Severity},
-     {title, l2b(Title)},
-     {summary, l2b(Summary)},
-     {occurred_at, l2b(strftime(Timestamp))}].
-
-%%--------------------------------------------------------------------------
-%% client
-%%--------------------------------------------------------------------------
-client('GET', _Params, Key) ->
-    Data = emqx_mgmt:client(l2b(Key)),
-    {ok, [{objects, [client_row(Row) || Row <- Data]}]}.
-
-client_list('GET', Params, Node) ->
-    {PageNo, PageSize} = page_params(Params),
-    Data = emqx_mgmt:client_list(l2a(Node), undefined, PageNo, PageSize),
-    Rows = get_value(result, Data),
-            TotalPage = get_value(totalPage, Data),
-            TotalNum  = get_value(totalNum, Data),
-            {ok, [{current_page, PageNo}, 
-                  {page_size, PageSize},
-                  {total_num, TotalNum},
-                  {total_page, TotalPage},
-                  {objects, [client_row(Row) || Row <- Rows]}]}.
-
-client_list('GET', Params, Node, Key) ->
-    {PageNo, PageSize} = page_params(Params),
-    Data = emqx_mgmt:client_list(l2a(Node), l2b(Key), PageNo, PageSize),
-    {ok, [{objects, [client_row(Row) || Row <- Data]}]}.
-
-kick_client('DELETE', _Params, Key) ->
-    case emqx_mgmt:kick_client(l2b(Key)) of
-        true  -> {ok, []};
-        false -> {error, [{code, ?ERROR12}]}
-    end.
-
-clean_acl_cache('PUT', Params, Key0) ->
-    Topic = get_value(<<"topic">>, Params),
-    [Key | _] = string:tokens(Key0, "/"),
-    case emqx_mgmt:clean_acl_cache(l2b(Key), Topic) of
-        true  -> {ok, []};
-        false -> {error, [{code, ?ERROR12}]}
-    end.
-
-client_row(#mqtt_client{client_id = ClientId,
-                 peername = {IpAddr, Port},
-                 username = Username,
-                 clean_sess = CleanSess,
-                 proto_ver = ProtoVer,
-                 keepalive = KeepAlvie,
-                 connected_at = ConnectedAt}) ->
-    [{client_id, ClientId},
-     {username, Username},
-     {ipaddress, l2b(ntoa(IpAddr))},
-     {port, Port},
-     {clean_sess, CleanSess},
-     {proto_ver, ProtoVer},
-     {keepalive, KeepAlvie},
-     {connected_at, l2b(strftime(ConnectedAt))}].
-
-%%--------------------------------------------------------------------------
-%% route
-%%--------------------------------------------------------------------------
-route('GET', _Params, Key) ->
-    Data = emqx_mgmt:route(l2b(Key)),
-    {ok, [{objects, [route_row(Row) || Row <- Data]}]}.
-
-route_list('GET', Params) ->
-    {PageNo, PageSize} = page_params(Params),
-    Data = emqx_mgmt:route_list(undefined, PageNo, PageSize),
-    Rows = get_value(result, Data),
-    TotalPage = get_value(totalPage, Data),
-    TotalNum  = get_value(totalNum, Data),
-    {ok, [{current_page, PageNo}, 
-          {page_size, PageSize},
-          {total_num, TotalNum},
-          {total_page, TotalPage},
-          {objects, [route_row(Row) || Row <- Rows]}]}.
-
-route_row(Route) when is_record(Route, mqtt_route) ->
-    [{topic, Route#mqtt_route.topic}, {node, Route#mqtt_route.node}];
-
-route_row({Topic, Node}) ->
-    [{topic, Topic}, {node, Node}].
-
-%%--------------------------------------------------------------------------
-%% session
-%%--------------------------------------------------------------------------
-session('GET', _Params, Key) ->
-    Data = emqx_mgmt:session(l2b(Key)),
-    {ok, [{objects, [session_row(Row) || Row <- Data]}]}.
-
-session_list('GET', Params, Node) ->
-    {PageNo, PageSize} = page_params(Params),
-    Data = emqx_mgmt:session_list(l2a(Node), undefined, PageNo, PageSize),
-    Rows = get_value(result, Data),
-    TotalPage = get_value(totalPage, Data),
-    TotalNum  = get_value(totalNum, Data),
-    {ok, [{current_page, PageNo}, 
-          {page_size, PageSize},
-          {total_num, TotalNum},
-          {total_page, TotalPage},
-          {objects, [session_row(Row) || Row <- Rows]}]}.
-
-session_list('GET', Params, Node, ClientId) ->
-    {PageNo, PageSize} = page_params(Params),
-    Data = emqx_mgmt:session_list(l2a(Node), l2b(ClientId), PageNo, PageSize),
-    {ok, [{objects, [session_row(Row) || Row <- Data]}]}.
-
-session_row({ClientId, _Pid, _Persistent, Session}) ->
-    Data = lists:append(Session, emqttd_stats:get_session_stats(ClientId)),
-    InfoKeys = [clean_sess, subscriptions, max_inflight, inflight_len, mqueue_len,
-                mqueue_dropped, awaiting_rel_len, deliver_msg,enqueue_msg, created_at],
-    [{client_id, ClientId} | [{Key, format(Key, get_value(Key, Data))} || Key <- InfoKeys]].
-
-%%--------------------------------------------------------------------------
-%% subscription
-%%--------------------------------------------------------------------------
-subscription('GET', _Params, Key) ->
-    Data = emqx_mgmt:subscription(l2b(Key)),
-    {ok, [{objects, [subscription_row(Row) || Row <- Data]}]}.
-
-subscription_list('GET', Params, Node) ->
-    {PageNo, PageSize} = page_params(Params),
-    Data = emqx_mgmt:subscription_list(l2a(Node), undefined, PageNo, PageSize),
-    Rows = get_value(result, Data),
-    TotalPage = get_value(totalPage, Data),
-    TotalNum  = get_value(totalNum, Data),
-    {ok, [{current_page, PageNo}, 
-          {page_size, PageSize},
-          {total_num, TotalNum},
-          {total_page, TotalPage},
-          {objects, [subscription_row(Row) || Row <- Rows]}]}.
-
-subscription_list('GET', Params, Node, Key) ->
-    {PageNo, PageSize} = page_params(Params),
-    Data = emqx_mgmt:subscription_list(l2a(Node), l2b(Key), PageNo, PageSize),
-    {ok, [{objects, [subscription_row(Row) || Row <- Data]}]}.
-
-subscription_row({{Topic, SubPid}, Options}) when is_pid(SubPid) ->
-    subscription_row({{Topic, {undefined, SubPid}}, Options});
-subscription_row({{Topic, {SubId, SubPid}}, Options}) ->
-    Qos = proplists:get_value(qos, Options),
-    ClientId = case SubId of
-                   undefined -> list_to_binary(pid_to_list(SubPid));
-                   SubId     -> SubId
-               end,
-    [{client_id, ClientId}, {topic, Topic}, {qos, Qos}].
-
-%%--------------------------------------------------------------------------
-%% management/monitoring
-%%--------------------------------------------------------------------------
-nodes('GET', _Params) ->
-    Data = emqx_mgmt:nodes_info(),
-    {ok, Data}.
-
-node('GET', _Params, Node) ->
-    Data = emqx_mgmt:node_info(l2a(Node)),
-    {ok, Data}.
-
-brokers('GET', _Params) ->
-    Data = emqx_mgmt:brokers(),
-    {ok, [format_broker(Node, Broker) || {Node, Broker} <- Data]}.
-
-broker('GET', _Params, Node) ->
-    Data = emqx_mgmt:broker(l2a(Node)),
-    {ok, format_broker(Data)}.
-
-listeners('GET', _Params) ->
-    Data = emqx_mgmt:listeners(),
-    {ok, [{Node, format_listeners(Listeners, [])} || {Node, Listeners} <- Data]}.
-
-listener('GET', _Params, Node) ->
-    Data = emqx_mgmt:listener(l2a(Node)),
-    {ok, [format_listener(Listeners) || Listeners <- Data]}.
-
-metrics('GET', _Params) ->
-    Data = emqx_mgmt:metrics(),
-    {ok, Data}.
-
-metric('GET', _Params, Node) ->
-    Data = emqx_mgmt:metrics(l2a(Node)),
-    {ok, Data}.
-
-stats('GET', _Params) ->
-    Data = emqx_mgmt:stats(),
-    {ok, [Data]}.
-
-stat('GET', _Params, Node) ->
-    Data = emqx_mgmt:stats(l2a(Node)),
-    {ok, Data}.
-
-format_broker(Node, Broker) ->
-    OtpRel  = "R" ++ erlang:system_info(otp_release) ++ "/" ++ erlang:system_info(version),
-    [{name,     Node},
-     {version,  bin(get_value(version, Broker))},
-     {sysdescr, bin(get_value(sysdescr, Broker))},
-     {uptime,   bin(get_value(uptime, Broker))},
-     {datetime, bin(get_value(datetime, Broker))},
-     {otp_release, l2b(OtpRel)},
-     {node_status, 'Running'}].
-
-format_broker(Broker) ->
-    OtpRel  = "R" ++ erlang:system_info(otp_release) ++ "/" ++ erlang:system_info(version),
-    [{version,  bin(get_value(version, Broker))},
-     {sysdescr, bin(get_value(sysdescr, Broker))},
-     {uptime,   bin(get_value(uptime, Broker))},
-     {datetime, bin(get_value(datetime, Broker))},
-     {otp_release, l2b(OtpRel)},
-     {node_status, 'Running'}].
-
-format_listeners([], Acc) ->
-    Acc;
-format_listeners([{Protocol, ListenOn, Info}| Listeners], Acc) ->
-    format_listeners(Listeners, [format_listener({Protocol, ListenOn, Info}) | Acc]).
-
-format_listener({Protocol, ListenOn, Info}) ->
-    Listen = l2b(esockd:to_string(ListenOn)),
-    lists:append([{protocol, Protocol}, {listen, Listen}], Info).
-
-%%--------------------------------------------------------------------------
-%% mqtt
-%%--------------------------------------------------------------------------
-publish('POST', Params) ->
-    Topic    = get_value(<<"topic">>, Params),
-    ClientId = get_value(<<"client_id">>, Params, http),
-    Payload  = get_value(<<"payload">>, Params, <<>>),
-    Qos      = get_value(<<"qos">>, Params, 0),
-    Retain   = get_value(<<"retain">>, Params, false),
-    case emqx_mgmt:publish({ClientId, Topic, Payload, Qos, Retain}) of
-        ok ->
-            {ok, []};
-        {error, Error} ->
-            {error, [{code, ?ERROR2}, {message, Error}]}
-    end.
-
-subscribe('POST', Params) ->
-    ClientId = get_value(<<"client_id">>, Params),
-    Topic    = get_value(<<"topic">>, Params),
-    Qos      = get_value(<<"qos">>, Params, 0),
-    case emqx_mgmt:subscribe({ClientId, Topic, Qos}) of
-        ok ->
-            {ok, []};
-        {error, Error} ->
-            {error, [{code, ?ERROR2}, {message, Error}]}
-    end.
-
-unsubscribe('POST', Params) ->
-    ClientId = get_value(<<"client_id">>, Params),
-    Topic    = get_value(<<"topic">>, Params),
-    case emqx_mgmt:unsubscribe({ClientId, Topic})of
-        ok ->
-            {ok, []};
-        {error, Error} ->
-            {error, [{code, ?ERROR2}, {message, Error}]}
-    end.
-
-%%--------------------------------------------------------------------------
-%% plugins
-%%--------------------------------------------------------------------------
-plugin_list('GET', _Params, Node) ->
-    Plugins = lists:map(fun plugin/1, emqx_mgmt:plugin_list(l2a(Node))),
-    {ok, Plugins}.
-
-enabled('PUT', Params, Node, PluginName) ->
-    Active = get_value(<<"active">>, Params),
-    case Active of
-        true ->
-            return(emqx_mgmt:plugin_load(l2a(Node), l2a(PluginName)));
-        false ->
-            return(emqx_mgmt:plugin_unload(l2a(Node), l2a(PluginName)))
-    end.
-
-return(Result) ->
-    case Result of
-        ok ->
-            {ok, []};
-        {ok, _} ->
-            {ok, []};
-        {error, already_started} ->
-            {error, [{code, ?ERROR10}, {message, <<"already_started">>}]};
-        {error, not_started} ->
-            {error, [{code, ?ERROR11}, {message, <<"not_started">>}]};
-        Error ->
-            lager:error("error:~p", [Error]),
-            {error, [{code, ?ERROR2}, {message, <<"unknown">>}]}
-    end.
-plugin(#mqtt_plugin{name = Name, version = Ver, descr = Descr,
-                    active = Active}) ->
-    [{name, Name},
-     {version, iolist_to_binary(Ver)},
-     {description, iolist_to_binary(Descr)},
-     {active, Active}].
-
-%%--------------------------------------------------------------------------
-%% modify config
-%%--------------------------------------------------------------------------
-modify_config('PUT', Params, App) ->
-    Key   = get_value(<<"key">>, Params, <<"">>),
-    Value = get_value(<<"value">>, Params, <<"">>),
-    case emqx_mgmt:modify_config(l2a(App), b2l(Key), b2l(Value)) of
-        true  -> {ok, []};
-        false -> {error, [{code, ?ERROR2}]}
-    end.
-
-modify_config('PUT', Params, Node, App) ->
-    Key   = get_value(<<"key">>, Params, <<"">>),
-    Value = get_value(<<"value">>, Params, <<"">>),
-    case emqx_mgmt:modify_config(l2a(Node), l2a(App), b2l(Key), b2l(Value)) of
-        ok  -> {ok, []};
-        _ -> {error, [{code, ?ERROR2}]}
-    end.
-
-config_list('GET', _Params) ->
-    Data = emqx_mgmt:get_configs(),
-    {ok, [{Node, format_config(Config, [])} || {Node, Config} <- Data]}.
-
-config_list('GET', _Params, Node) ->
-    Data = emqx_mgmt:get_config(l2a(Node)),
-    {ok, [format_config(Config) || Config <- lists:reverse(Data)]}.
-
-plugin_config_list('GET', _Params, Node, App) ->
-    {ok, Data} = emqx_mgmt:get_plugin_config(l2a(Node), l2a(App)),
-    {ok, [format_plugin_config(Config) || Config <- lists:reverse(Data)]}.
-
-modify_plugin_config('PUT', Params, Node, App) ->
-    PluginName = l2a(App),
-    case emqx_mgmt:modify_plugin_config(l2a(Node), PluginName, Params) of
-        ok  ->
-            Plugins = emqttd_plugins:list(),
-            {_, _, _, _, Status} = lists:keyfind(PluginName, 2, Plugins),
-            case Status of
-                true  ->
-                    emqttd_plugins:unload(PluginName),
-                    timer:sleep(500),
-                    emqttd_plugins:load(PluginName),
-                    {ok, []};
-                false ->
-                    {ok, []}
-            end;
-        _ ->
-            {error, [{code, ?ERROR2}]}
-    end.
-
-
-format_config([], Acc) ->
-    Acc;
-format_config([{Key, Value, Datatpye, App}| Configs], Acc) ->
-    format_config(Configs, [format_config({Key, Value, Datatpye, App}) | Acc]).
-
-format_config({Key, Value, Datatpye, App}) ->
-    [{<<"key">>, l2b(Key)},
-     {<<"value">>, l2b(Value)},
-     {<<"datatpye">>, l2b(Datatpye)},
-     {<<"app">>, App}].
-
-format_plugin_config({Key, Value, Desc, Required}) ->
-    [{<<"key">>, l2b(Key)},
-     {<<"value">>, l2b(Value)},
-     {<<"desc">>, l2b(Desc)},
-     {<<"required">>, Required}].
-
-%%--------------------------------------------------------------------------
-%% Admin
-%%--------------------------------------------------------------------------
-auth('POST', Params) ->
-    Username = get_value(<<"username">>, Params),
-    Password = get_value(<<"password">>, Params),
-    case emqx_mgmt:check_user(Username, Password) of
-        ok ->
-            {ok, []};
-        {error, Reason} ->
-            {error, [{code, ?ERROR3}, {message, list_to_binary(Reason)}]}
-    end.
-
-users('POST', Params) ->
-    Username = get_value(<<"username">>, Params),
-    Password = get_value(<<"password">>, Params),
-    Tag = get_value(<<"tags">>, Params),
-    code(emqx_mgmt:add_user(Username, Password, Tag));
-
-users('GET', _Params) ->
-    {ok, [Admin || Admin <- emqx_mgmt:user_list()]}.
-
-users('GET', _Params, Username) ->
-    {ok, emqx_mgmt:lookup_user(list_to_binary(Username))};
-
-users('PUT', Params, Username) ->
-    code(emqx_mgmt:update_user(list_to_binary(Username), Params));
-
-users('DELETE', _Params, "admin") ->
-    {error, [{code, ?ERROR6}, {message, <<"admin cannot be deleted">>}]};
-users('DELETE', _Params, Username) ->
-    code(emqx_mgmt:remove_user(list_to_binary(Username))).
-
-change_pwd('PUT', Params, Username) ->
-    OldPwd = get_value(<<"old_pwd">>, Params),
-    NewPwd = get_value(<<"new_pwd">>, Params),
-    code(emqx_mgmt:change_password(list_to_binary(Username), OldPwd, NewPwd)).
-
-code(ok)             -> {ok, []};
-code(error)          -> {error, [{code, ?ERROR2}]};
-code({error, Error}) -> {error, Error}.
-%%--------------------------------------------------------------------------
-%% Inner function
-%%--------------------------------------------------------------------------
-format(created_at, Val) ->
-    l2b(strftime(Val));
-format(_, Val) ->
-    Val.
-
-ntoa({0,0,0,0,0,16#ffff,AB,CD}) ->
-    inet_parse:ntoa({AB bsr 8, AB rem 256, CD bsr 8, CD rem 256});
-ntoa(IP) ->
-    inet_parse:ntoa(IP).
-
-%%--------------------------------------------------------------------
-%% Strftime
-%%--------------------------------------------------------------------
-strftime({MegaSecs, Secs, _MicroSecs}) ->
-    strftime(datetime(MegaSecs * 1000000 + Secs));
-
-strftime({{Y,M,D}, {H,MM,S}}) ->
-    lists:flatten(
-        io_lib:format(
-            "~4..0w-~2..0w-~2..0w ~2..0w:~2..0w:~2..0w", [Y, M, D, H, MM, S])).
-
-datetime(Timestamp) when is_integer(Timestamp) ->
-    Universal = calendar:gregorian_seconds_to_datetime(Timestamp +
-    calendar:datetime_to_gregorian_seconds({{1970,1,1}, {0,0,0}})),
-    calendar:universal_time_to_local_time(Universal).
-
-bin(S) when is_list(S)   -> l2b(S);
-bin(A) when is_atom(A)   -> bin(atom_to_list(A));
-bin(B) when is_binary(B) -> B;
-bin(undefined) -> <<>>.
-int(L) -> list_to_integer(L).
-l2a(L) -> list_to_atom(L).
-l2b(L) -> list_to_binary(L).
-b2l(B) -> binary_to_list(B).
-
-
-page_params(Params) ->
-    PageNo = int(get_value("curr_page", Params, "1")),
-    PageSize = int(get_value("page_size", Params, "20")),
-    {PageNo, PageSize}.