[api] use /sensor endpoint for submitting measurement values

This commit is contained in:
Bart Van Der Meerssche 2011-03-22 20:23:55 +00:00
parent de4e46531d
commit a80ea44ca3
3 changed files with 108 additions and 1 deletions

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@ -6,6 +6,7 @@
flukso_app,
flukso_sup,
flukso_deps,
flukso_sensor,
flukso_sensor_xyz
]},
{registered, []},

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@ -16,7 +16,8 @@ ensure_started(App) ->
end.
mysql_prepare() ->
mysql:prepare(permissions, <<"SELECT permissions FROM logger_tokens WHERE meter = ? AND token = ?">>).
mysql:prepare(permissions, <<"SELECT permissions FROM logger_tokens WHERE meter = ? AND token = ?">>),
mysql:prepare(device_key, <<"SELECT sha FROM logger_devices WHERE device = ?">>).
%% @spec start_link() -> {ok,Pid::pid()}
%% @doc Starts the app for inclusion in a supervisor tree

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@ -0,0 +1,105 @@
%% @author icarus75 <bart.vandermeerssche@flukso.net>
%% @copyright 2009-2010 flukso.net
%% @doc Flukso webmachine_resource.
-module(flukso_sensor).
-export([init/1,
allowed_methods/2,
malformed_request/2,
is_authorized/2,
process_post/2]).
-include_lib("webmachine/include/webmachine.hrl").
-record(state,
{rrdSensor}).
init([]) ->
{ok, undefined}.
% debugging
%init(Config) ->
% {{trace, "/tmp"}, Config}.
allowed_methods(ReqData, State) ->
{['POST'], ReqData, State}.
malformed_request(ReqData, State) ->
{_Version, ValidVersion} = check_version(wrq:get_req_header("X-Version", ReqData), wrq:get_qs_value("version", ReqData)),
% TODO: check validity of X-Device and X-Digest headers
{case {ValidVersion} of
{true} -> false;
_ -> true
end,
ReqData, State}.
is_authorized(ReqData, State) ->
{data, Result} = mysql:execute(pool, device_key, [wrq:get_req_header("X-Device", ReqData)]),
[[Key]] = mysql:get_result_rows(Result),
Data = wrq:req_body(ReqData),
<<X:160/big-unsigned-integer>> = crypto:sha_mac(Key, Data),
Digest = list_to_binary(io_lib:format("~40.16.0b", [X])),
{case list_to_binary(wrq:get_req_header("X-Digest", ReqData)) of
Digest -> true;
_WrongDigest -> "access refused"
end,
ReqData, State}.
% JSON: {"measurements":{"<sensor1>":[[<ts11>,<value11>],...,[<ts1m>,<value1m>]],
% ...,
% "<sensorn>":[[<tsn1>,<valuen1>],...,[<tsnm>,<valuenm>]]}}
%
% Mochijson2: {struct,[{<<"measurements">>, {struct, [{<<"<sensor1>">>, [[<ts11>,<value11>],...,[<ts1m>,<value1m>]]},
% ...,
% {<<"<sensorn>">>, [[<tsn1>,<valuen1>],...,[<tsnm>,<valuenm>]]}]}}]}
%
process_post(ReqData, State) ->
{struct, JsonData} = mochijson2:decode(wrq:req_body(ReqData)),
{struct, Measurements} = proplists:get_value(<<"measurements">>, JsonData),
Ids = proplists:get_keys(Measurements),
RrdResponse = [update(RrdSensor, proplists:get_value(RrdSensor, Measurements)) || RrdSensor <- Ids],
JsonResponse = mochijson2:encode({struct, [{<<"response">>, {struct, RrdResponse}}]}),
{true , wrq:set_resp_body(JsonResponse, ReqData), State}.
update(RrdSensor, TimeSeries) ->
Path = "var/data/base/",
RrdData = [[integer_to_list(Time), ":", integer_to_list(Counter), " "] || [Time, Counter] <- TimeSeries],
%debugging: io:format("~s~n", [[Path, [binary_to_list(RrdSensor)|".rrd"], " ", RrdData]]),
case erlrrd:update([Path, [binary_to_list(RrdSensor)|".rrd"], " ", RrdData]) of
{ok, _RrdResponse} -> {RrdSensor, <<"ok">>};
{error, RrdResponse} -> {RrdSensor, list_to_binary(RrdResponse)}
end.
%% checks
check_version(undefined, undefined) ->
{false, false};
check_version(Version, undefined) ->
case Version of
"1.0" -> {Version, true};
_ -> {false, false}
end;
check_version(undefined, Version) ->
check_version(Version, undefined);
check_version(_, _) ->
{false, false}.
check_sensor(Sensor) ->
case re:run(Sensor, "[0-9a-f]+", []) of
{match, [{0,32}]} -> {Sensor, true};
_ -> {false, false}
end.
check_token(undefined, undefined) ->
{false, false};
check_token(Token, undefined) ->
check_sensor(Token);
check_token(undefined, Token) ->
check_sensor(Token);
check_token(_, _) ->
{false, false}.