machi/src/machi_flu1.erl

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%% -------------------------------------------------------------------
%%
%% Copyright (c) 2007-2015 Basho Technologies, Inc. All Rights Reserved.
%%
%% This file is provided to you 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.
%%
%% -------------------------------------------------------------------
%% @doc The Machi FLU file server + file location sequencer.
%%
%% This module implements only the Machi FLU file server and its
%% implicit sequencer.
%% Please see the EDoc "Overview" for details about the FLU as a
%% primitive file server process vs. the larger Machi design of a FLU
%% as a sequencer + file server + chain manager group of processes.
%%
%% The FLU is named after the CORFU server "FLU" or "FLash Unit" server.
%%
%% === Protocol origins ===
%%
%% The protocol implemented here is an artisanal, hand-crafted, silly
%% thing that was very quick to put together for a "demo day" proof of
%% concept. It will almost certainly be replaced with something else,
%% both in terms of wire format and better code separation of
%% serialization/deserialization vs. network transport management,
%% etc.
%%
%% For the moment, this module implements a rudimentary TCP-based
%% protocol as the sole supported access method to the server,
%% sequencer, and projection store. Conceptually, those three
%% services are independent and ought to have their own protocols. As
%% a practical matter, there is no need for wire protocol
%% compatibility. Furthermore, from the perspective of failure
%% detection, it is very convenient that all three FLU-related
%% services are accessed using the same single TCP port.
%%
%% === TODO items ===
%%
%% TODO There is a major missing feature in this FLU implementation:
%% there is no "write-once" enforcement for any position in a Machi
%% file. At the moment, we rely on correct behavior of the client
%% & the sequencer to avoid overwriting data. In the Real World,
%% however, all Machi file data is supposed to be exactly write-once
%% to avoid problems with bugs, wire protocol corruption, malicious
%% clients, etc.
%%
%% TODO The per-file metadata tuple store is missing from this implementation.
%%
%% TODO Section 4.1 ("The FLU") of the Machi design doc suggests that
%% the FLU keep track of the epoch number of the last file write (and
%% perhaps last metadata write), as an optimization for inter-FLU data
%% replication/chain repair.
%%
%% TODO Section 4.2 ("The Sequencer") says that the sequencer must
%% change its file assignments to new & unique names whenever we move
%% to wedge state. This is not yet implemented. In the current
%% Erlang process scheme (which will probably be changing soon), a
%% simple implementation would stop all existing processes that are
%% running run_seq_append_server().
-module(machi_flu1).
-include_lib("kernel/include/file.hrl").
-include("machi.hrl").
-include("machi_pb.hrl").
-include("machi_projection.hrl").
-define(SERVER_CMD_READ_TIMEOUT, 600*1000).
-export([start_link/1, stop/1,
update_wedge_state/3]).
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-export([make_listener_regname/1, make_projection_server_regname/1]).
-record(state, {
flu_name :: atom(),
proj_store :: pid(),
append_pid :: pid(),
tcp_port :: non_neg_integer(),
data_dir :: string(),
wedged = true :: boolean(),
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etstab :: ets:tid(),
epoch_id :: 'undefined' | machi_dt:epoch_id(),
dbg_props = [] :: list(), % proplist
props = [] :: list() % proplist
}).
Damn ugly HTTP interface "equivalent" for machi_cr_client.erl basic API This goes to show that mixing implementation and protocol and API and lots of other stuff ... is cool for the quick hack to do one thing but really sucks when trying to do more than one thing. * Proof-of-concept only: add HTTP/1.0'ish 'PUT' interface to be the rough equivalent of machi_cr_client:append_chunk/3 * Proof-of-concept only: add HTTP/1.0'ish 'GET' interface to be the rough equivalent of machi_cr_client:read_chunk/4 Example use: `append_chunk` % curl http://127.0.0.1:4444/foo -0 -T /etc/hosts -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > PUT /foo HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > Content-Length: 338 > * We are completely uploaded and fine * HTTP 1.0, assume close after body < HTTP/1.0 201 Created < Location: foo.50EI18AX.21 < X-Offset: 3052 < X-Size: 338 < * Closing connection 0 Example_use: `read_chunk` curl 'http://127.0.0.1:4444/foo.50EI18AX.21?offset=3052&size=338' -0 -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > GET /foo.50EI18AX.21?offset=3052&size=338 HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > * HTTP 1.0, assume close after body < HTTP/1.0 200 OK < Content-Length: 338 < ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 127.0.0.1 test.localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost # Xxxxxxx Yyyyy 192.168.99.222 zzzzz 127.0.0.1 aaaaaaaa.bb.ccccccccc.com * Closing connection 0
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-record(http_goop, {
len, % content-length
x_csum % x-checksum
Damn ugly HTTP interface "equivalent" for machi_cr_client.erl basic API This goes to show that mixing implementation and protocol and API and lots of other stuff ... is cool for the quick hack to do one thing but really sucks when trying to do more than one thing. * Proof-of-concept only: add HTTP/1.0'ish 'PUT' interface to be the rough equivalent of machi_cr_client:append_chunk/3 * Proof-of-concept only: add HTTP/1.0'ish 'GET' interface to be the rough equivalent of machi_cr_client:read_chunk/4 Example use: `append_chunk` % curl http://127.0.0.1:4444/foo -0 -T /etc/hosts -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > PUT /foo HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > Content-Length: 338 > * We are completely uploaded and fine * HTTP 1.0, assume close after body < HTTP/1.0 201 Created < Location: foo.50EI18AX.21 < X-Offset: 3052 < X-Size: 338 < * Closing connection 0 Example_use: `read_chunk` curl 'http://127.0.0.1:4444/foo.50EI18AX.21?offset=3052&size=338' -0 -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > GET /foo.50EI18AX.21?offset=3052&size=338 HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > * HTTP 1.0, assume close after body < HTTP/1.0 200 OK < Content-Length: 338 < ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 127.0.0.1 test.localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost # Xxxxxxx Yyyyy 192.168.99.222 zzzzz 127.0.0.1 aaaaaaaa.bb.ccccccccc.com * Closing connection 0
2015-05-22 08:40:53 +00:00
}).
start_link([{FluName, TcpPort, DataDir}|Rest])
when is_atom(FluName), is_integer(TcpPort), is_list(DataDir) ->
{ok, spawn_link(fun() -> main2(FluName, TcpPort, DataDir, Rest) end)}.
stop(Pid) ->
case erlang:is_process_alive(Pid) of
true ->
Pid ! killme,
ok;
false ->
error
end.
update_wedge_state(PidSpec, Boolean, EpochId)
when (Boolean == true orelse Boolean == false), is_tuple(EpochId) ->
PidSpec ! {wedge_state_change, Boolean, EpochId}.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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ets_table_name(FluName) when is_atom(FluName) ->
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list_to_atom(atom_to_list(FluName) ++ "_epoch").
%% ets_table_name(FluName) when is_binary(FluName) ->
%% list_to_atom(binary_to_list(FluName) ++ "_epoch").
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main2(FluName, TcpPort, DataDir, Rest) ->
{Props, DbgProps} = case proplists:get_value(dbg, Rest) of
undefined ->
{Rest, []};
DPs ->
{lists:keydelete(dbg, 1, Rest), DPs}
end,
{SendAppendPidToProj_p, ProjectionPid} =
case proplists:get_value(projection_store_registered_name, Rest) of
undefined ->
RN = make_projection_server_regname(FluName),
{ok, PP} =
machi_projection_store:start_link(RN, DataDir, undefined),
{true, PP};
RN ->
{false, whereis(RN)}
end,
InitialWedged_p = proplists:get_value(initial_wedged, DbgProps),
ProjRes = machi_projection_store:read_latest_projection(ProjectionPid,
private),
{Wedged_p, EpochId} =
if InitialWedged_p == undefined,
is_tuple(ProjRes), element(1, ProjRes) == ok ->
{ok, Proj} = ProjRes,
{false, {Proj#projection_v1.epoch_number,
Proj#projection_v1.epoch_csum}};
InitialWedged_p == false ->
{false, ?DUMMY_PV1_EPOCH};
true ->
{true, undefined}
end,
S0 = #state{flu_name=FluName,
proj_store=ProjectionPid,
tcp_port=TcpPort,
data_dir=DataDir,
wedged=Wedged_p,
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etstab=ets_table_name(FluName),
epoch_id=EpochId,
dbg_props=DbgProps,
props=Props},
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AppendPid = start_append_server(S0, self()),
receive
append_server_ack -> ok
end,
if SendAppendPidToProj_p ->
machi_projection_store:set_wedge_notify_pid(ProjectionPid,
AppendPid);
true ->
ok
end,
S1 = S0#state{append_pid=AppendPid},
ListenPid = start_listen_server(S1),
Config_e = machi_util:make_config_filename(DataDir, "unused"),
ok = filelib:ensure_dir(Config_e),
{_, Data_e} = machi_util:make_data_filename(DataDir, "unused"),
ok = filelib:ensure_dir(Data_e),
Projection_e = machi_util:make_projection_filename(DataDir, "unused"),
ok = filelib:ensure_dir(Projection_e),
put(flu_flu_name, FluName),
put(flu_append_pid, AppendPid),
put(flu_projection_pid, ProjectionPid),
put(flu_listen_pid, ListenPid),
receive killme -> ok end,
(catch exit(AppendPid, kill)),
(catch exit(ProjectionPid, kill)),
(catch exit(ListenPid, kill)),
ok.
start_listen_server(S) ->
proc_lib:spawn_link(fun() -> run_listen_server(S) end).
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start_append_server(S, AckPid) ->
FluPid = self(),
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proc_lib:spawn_link(fun() -> run_append_server(FluPid, AckPid, S) end).
%% start_projection_server(S) ->
%% spawn_link(fun() -> run_projection_server(S) end).
run_listen_server(#state{flu_name=FluName, tcp_port=TcpPort}=S) ->
register(make_listener_regname(FluName), self()),
SockOpts = [{reuseaddr, true},
{mode, binary}, {active, false}, {packet, line}],
case gen_tcp:listen(TcpPort, SockOpts) of
{ok, LSock} ->
listen_server_loop(LSock, S);
Else ->
error_logger:warning_msg("~s:run_listen_server: "
"listen to TCP port ~w: ~w\n",
[?MODULE, TcpPort, Else]),
exit({?MODULE, run_listen_server, tcp_port, TcpPort, Else})
end.
run_append_server(FluPid, AckPid, #state{flu_name=Name,
wedged=Wedged_p,epoch_id=EpochId}=S) ->
%% Reminder: Name is the "main" name of the FLU, i.e., no suffix
register(Name, self()),
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TID = ets:new(ets_table_name(Name),
[set, protected, named_table, {read_concurrency, true}]),
%% InitialWedged = proplists:get_value(initial_wedged, DbgProps, true),
%% ets:insert(TID, {epoch, {InitialWedged, {-65, <<"bogus epoch, yo">>}}}),
ets:insert(TID, {epoch, {Wedged_p, EpochId}}),
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AckPid ! append_server_ack,
append_server_loop(FluPid, S#state{etstab=TID}).
listen_server_loop(LSock, S) ->
{ok, Sock} = gen_tcp:accept(LSock),
spawn_link(fun() -> net_server_loop(Sock, S) end),
listen_server_loop(LSock, S).
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append_server_loop(FluPid, #state{data_dir=DataDir,wedged=Wedged_p}=S) ->
AppendServerPid = self(),
receive
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{seq_append, From, _Prefix, _Chunk, _CSum, _Extra} when Wedged_p ->
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From ! wedged,
append_server_loop(FluPid, S);
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{seq_append, From, Prefix, Chunk, CSum, Extra} ->
spawn(fun() -> append_server_dispatch(From, Prefix,
Chunk, CSum, Extra,
DataDir, AppendServerPid) end),
append_server_loop(FluPid, S);
{wedge_state_change, Boolean, EpochId} ->
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true = ets:insert(S#state.etstab, {epoch, {Boolean, EpochId}}),
append_server_loop(FluPid, S#state{wedged=Boolean,
epoch_id=EpochId});
{wedge_status, FromPid} ->
#state{wedged=Wedged_p, epoch_id=EpochId} = S,
FromPid ! {wedge_status_reply, Wedged_p, EpochId},
append_server_loop(FluPid, S);
Else ->
io:format(user, "append_server_loop: WHA? ~p\n", [Else]),
append_server_loop(FluPid, S)
end.
-define(EpochIDSpace, ((4*2)+(20*2))). % hexencodingwhee!
-define(CSumSpace, ((1*2)+(20*2))). % hexencodingwhee!
decode_epoch_id(EpochIDHex) ->
<<EpochNum:(4*8)/big, EpochCSum/binary>> =
machi_util:hexstr_to_bin(EpochIDHex),
{EpochNum, EpochCSum}.
net_server_loop(Sock, #state{flu_name=FluName, data_dir=DataDir}=S) ->
ok = inet:setopts(Sock, [{packet, line}]),
%% TODO: Add testing control knob to adjust this timeout and/or inject
%% timeout condition.
case gen_tcp:recv(Sock, 0, ?SERVER_CMD_READ_TIMEOUT) of
{ok, Line} ->
%% machi_util:verb("Got: ~p\n", [Line]),
PrefixLenLF = byte_size(Line) - 2 - ?EpochIDSpace - ?CSumSpace
- 8 - 8 - 1,
FileLenLF = byte_size(Line) - 2 - ?EpochIDSpace - 16 - 8 - 1,
CSumFileLenLF = byte_size(Line) - 2 - ?EpochIDSpace - 1,
WriteFileLenLF = byte_size(Line) - 7 - ?EpochIDSpace - ?CSumSpace
- 16 - 8 - 1,
DelFileLenLF = byte_size(Line) - 14 - ?EpochIDSpace - 1,
case Line of
%% For normal use
<<"A ",
EpochIDHex:(?EpochIDSpace)/binary,
CSumHex:(?CSumSpace)/binary,
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LenHex:8/binary, ExtraHex:8/binary,
Prefix:PrefixLenLF/binary, "\n">> ->
_EpochID = decode_epoch_id(EpochIDHex),
do_net_server_append(FluName, Sock, CSumHex,
LenHex, ExtraHex, Prefix);
<<"R ",
EpochIDHex:(?EpochIDSpace)/binary,
OffsetHex:16/binary, LenHex:8/binary,
File:FileLenLF/binary, "\n">> ->
EpochID = decode_epoch_id(EpochIDHex),
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do_net_server_read(Sock, OffsetHex, LenHex, File, DataDir,
EpochID, S);
<<"L ", EpochIDHex:(?EpochIDSpace)/binary, "\n">> ->
_EpochID = decode_epoch_id(EpochIDHex),
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do_net_server_listing(Sock, DataDir, S);
<<"C ",
EpochIDHex:(?EpochIDSpace)/binary,
File:CSumFileLenLF/binary, "\n">> ->
_EpochID = decode_epoch_id(EpochIDHex),
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do_net_server_checksum_listing(Sock, File, DataDir, S);
<<"QUIT\n">> ->
catch gen_tcp:close(Sock),
exit(normal);
<<"QUIT\r\n">> ->
catch gen_tcp:close(Sock),
exit(normal);
%% For "internal" replication only.
<<"W-repl ",
EpochIDHex:(?EpochIDSpace)/binary,
CSumHex:(?CSumSpace)/binary,
OffsetHex:16/binary, LenHex:8/binary,
File:WriteFileLenLF/binary, "\n">> ->
_EpochID = decode_epoch_id(EpochIDHex),
do_net_server_write(Sock, CSumHex, OffsetHex, LenHex,
File, DataDir,
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<<"fixme1">>, false, <<"fixme2">>);
%% For data migration only.
<<"DEL-migration ",
EpochIDHex:(?EpochIDSpace)/binary,
File:DelFileLenLF/binary, "\n">> ->
_EpochID = decode_epoch_id(EpochIDHex),
do_net_server_delete_migration_only(Sock, File, DataDir);
%% For erasure coding hackityhack
<<"TRUNC-hack--- ",
EpochIDHex:(?EpochIDSpace)/binary,
File:DelFileLenLF/binary, "\n">> ->
_EpochID = decode_epoch_id(EpochIDHex),
do_net_server_truncate_hackityhack(Sock, File, DataDir);
<<"PROJ ", LenHex:8/binary, "\n">> ->
do_projection_command(Sock, LenHex, S);
<<"WEDGE-STATUS\n">> ->
do_wedge_status(FluName, Sock);
Damn ugly HTTP interface "equivalent" for machi_cr_client.erl basic API This goes to show that mixing implementation and protocol and API and lots of other stuff ... is cool for the quick hack to do one thing but really sucks when trying to do more than one thing. * Proof-of-concept only: add HTTP/1.0'ish 'PUT' interface to be the rough equivalent of machi_cr_client:append_chunk/3 * Proof-of-concept only: add HTTP/1.0'ish 'GET' interface to be the rough equivalent of machi_cr_client:read_chunk/4 Example use: `append_chunk` % curl http://127.0.0.1:4444/foo -0 -T /etc/hosts -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > PUT /foo HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > Content-Length: 338 > * We are completely uploaded and fine * HTTP 1.0, assume close after body < HTTP/1.0 201 Created < Location: foo.50EI18AX.21 < X-Offset: 3052 < X-Size: 338 < * Closing connection 0 Example_use: `read_chunk` curl 'http://127.0.0.1:4444/foo.50EI18AX.21?offset=3052&size=338' -0 -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > GET /foo.50EI18AX.21?offset=3052&size=338 HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > * HTTP 1.0, assume close after body < HTTP/1.0 200 OK < Content-Length: 338 < ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 127.0.0.1 test.localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost # Xxxxxxx Yyyyy 192.168.99.222 zzzzz 127.0.0.1 aaaaaaaa.bb.ccccccccc.com * Closing connection 0
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<<"PUT ", _/binary>>=PutLine ->
http_server_hack(FluName, PutLine, Sock, S);
<<"GET ", _/binary>>=PutLine ->
http_server_hack(FluName, PutLine, Sock, S);
<<"PROTOCOL-BUFFERS\n">> ->
ok = gen_tcp:send(Sock, <<"OK\n">>),
ok = inet:setopts(Sock, [{packet, 4}]),
protocol_buffers_loop(Sock, S);
_ ->
machi_util:verb("Else Got: ~p\n", [Line]),
io:format(user, "TODO: Else Got: ~p\n", [Line]),
gen_tcp:send(Sock, "ERROR SYNTAX\n"),
catch gen_tcp:close(Sock),
exit(normal)
end,
net_server_loop(Sock, S);
_ ->
catch gen_tcp:close(Sock),
exit(normal)
end.
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append_server_dispatch(From, Prefix, Chunk, CSum, Extra, DataDir, LinkPid) ->
Pid = write_server_get_pid(Prefix, DataDir, LinkPid),
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Pid ! {seq_append, From, Prefix, Chunk, CSum, Extra},
exit(normal).
do_net_server_append(FluName, Sock, CSumHex, LenHex, ExtraHex, Prefix) ->
%% TODO: robustify against other invalid path characters such as NUL
case sanitize_file_string(Prefix) of
ok ->
do_net_server_append2(FluName, Sock, CSumHex,
LenHex, ExtraHex, Prefix);
_ ->
ok = gen_tcp:send(Sock, <<"ERROR BAD-ARG">>)
end.
sanitize_file_string(Str) ->
case re:run(Str, "/") of
nomatch ->
ok;
_ ->
error
end.
do_net_server_append2(FluName, Sock, CSumHex, LenHex, ExtraHex, Prefix) ->
<<Len:32/big>> = machi_util:hexstr_to_bin(LenHex),
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<<Extra:32/big>> = machi_util:hexstr_to_bin(ExtraHex),
ClientCSum = machi_util:hexstr_to_bin(CSumHex),
ok = inet:setopts(Sock, [{packet, raw}]),
{ok, Chunk} = gen_tcp:recv(Sock, Len, 60*1000),
try
CSum = case ClientCSum of
<<?CSUM_TAG_NONE:8, _/binary>> ->
%% TODO: If the client was foolish enough to use
%% this type of non-checksum, then the client gets
%% what it deserves wrt data integrity, alas. In
%% the client-side Chain Replication method, each
%% server will calculated this independently, which
%% isn't exactly what ought to happen for best data
%% integrity checking. In server-side CR, the csum
%% should be calculated by the head and passed down
%% the chain together with the value.
CS = machi_util:checksum_chunk(Chunk),
machi_util:make_tagged_csum(server_gen, CS);
<<?CSUM_TAG_CLIENT_GEN:8, ClientCS/binary>> ->
CS = machi_util:checksum_chunk(Chunk),
if CS == ClientCS ->
ClientCSum;
true ->
throw({bad_csum, CS})
end;
_ ->
ClientCSum
end,
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FluName ! {seq_append, self(), Prefix, Chunk, CSum, Extra}
catch
throw:{bad_csum, _CS} ->
ok = gen_tcp:send(Sock, <<"ERROR BAD-CHECKSUM\n">>),
exit(normal);
error:badarg ->
error_logger:error_msg("Message send to ~p gave badarg, make certain server is running with correct registered name\n", [?MODULE])
end,
receive
{assignment, Offset, File} ->
OffsetHex = machi_util:bin_to_hexstr(<<Offset:64/big>>),
Out = io_lib:format("OK ~s ~s ~s\n", [CSumHex, OffsetHex, File]),
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ok = gen_tcp:send(Sock, Out);
wedged ->
ok = gen_tcp:send(Sock, <<"ERROR WEDGED\n">>)
after 10*1000 ->
ok = gen_tcp:send(Sock, "TIMEOUT\n")
end.
do_wedge_status(FluName, Sock) ->
FluName ! {wedge_status, self()},
Reply = receive
{wedge_status_reply, Bool, EpochId} ->
BoolHex = if Bool == false -> <<"00">>;
Bool == true -> <<"01">>
end,
case EpochId of
undefined ->
EpochHex = machi_util:int_to_hexstr(0, 32),
CSumHex = machi_util:bin_to_hexstr(<<0:(20*8)/big>>);
{Epoch, EpochCSum} ->
EpochHex = machi_util:int_to_hexstr(Epoch, 32),
CSumHex = machi_util:bin_to_hexstr(EpochCSum)
end,
[<<"OK ">>, BoolHex, 32, EpochHex, 32, CSumHex, 10]
after 30*1000 ->
<<"give_it_up\n">>
end,
ok = gen_tcp:send(Sock, Reply).
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do_net_server_read(Sock, OffsetHex, LenHex, FileBin, DataDir,
EpochID, S) ->
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{Wedged_p, CurrentEpochId} = ets:lookup_element(S#state.etstab, epoch, 2),
DoItFun = fun(FH, Offset, Len) ->
case file:pread(FH, Offset, Len) of
{ok, Bytes} when byte_size(Bytes) == Len ->
gen_tcp:send(Sock, ["OK\n", Bytes]);
{ok, Bytes} ->
machi_util:verb("ok read but wanted ~p got ~p: ~p @ offset ~p\n",
[Len, size(Bytes), FileBin, Offset]),
ok = gen_tcp:send(Sock, "ERROR PARTIAL-READ\n");
eof ->
perhaps_do_net_server_ec_read(Sock, FH);
_Else2 ->
machi_util:verb("Else2 ~p ~p ~P\n",
[Offset, Len, _Else2, 20]),
ok = gen_tcp:send(Sock, "ERROR BAD-READ\n")
end
end,
do_net_server_readwrite_common(Sock, OffsetHex, LenHex, FileBin, DataDir,
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[read, binary, raw], DoItFun,
EpochID, Wedged_p, CurrentEpochId).
do_net_server_readwrite_common(Sock, OffsetHex, LenHex, FileBin, DataDir,
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FileOpts, DoItFun,
EpochID, Wedged_p, CurrentEpochId) ->
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case {Wedged_p, sanitize_file_string(FileBin)} of
{false, ok} ->
do_net_server_readwrite_common2(Sock, OffsetHex, LenHex, FileBin,
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DataDir, FileOpts, DoItFun,
EpochID, Wedged_p, CurrentEpochId);
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{true, _} ->
ok = gen_tcp:send(Sock, <<"ERROR WEDGED\n">>);
{_, __} ->
ok = gen_tcp:send(Sock, <<"ERROR BAD-ARG\n">>)
end.
do_net_server_readwrite_common2(Sock, OffsetHex, LenHex, FileBin, DataDir,
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FileOpts, DoItFun,
EpochID, Wedged_p, CurrentEpochId) ->
Damn ugly HTTP interface "equivalent" for machi_cr_client.erl basic API This goes to show that mixing implementation and protocol and API and lots of other stuff ... is cool for the quick hack to do one thing but really sucks when trying to do more than one thing. * Proof-of-concept only: add HTTP/1.0'ish 'PUT' interface to be the rough equivalent of machi_cr_client:append_chunk/3 * Proof-of-concept only: add HTTP/1.0'ish 'GET' interface to be the rough equivalent of machi_cr_client:read_chunk/4 Example use: `append_chunk` % curl http://127.0.0.1:4444/foo -0 -T /etc/hosts -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > PUT /foo HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > Content-Length: 338 > * We are completely uploaded and fine * HTTP 1.0, assume close after body < HTTP/1.0 201 Created < Location: foo.50EI18AX.21 < X-Offset: 3052 < X-Size: 338 < * Closing connection 0 Example_use: `read_chunk` curl 'http://127.0.0.1:4444/foo.50EI18AX.21?offset=3052&size=338' -0 -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > GET /foo.50EI18AX.21?offset=3052&size=338 HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > * HTTP 1.0, assume close after body < HTTP/1.0 200 OK < Content-Length: 338 < ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 127.0.0.1 test.localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost # Xxxxxxx Yyyyy 192.168.99.222 zzzzz 127.0.0.1 aaaaaaaa.bb.ccccccccc.com * Closing connection 0
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NoSuchFileFun = fun(Sck) ->
ok = gen_tcp:send(Sck, <<"ERROR NO-SUCH-FILE\n">>)
end,
BadIoFun = fun(Sck) ->
ok = gen_tcp:send(Sck, <<"ERROR BAD-IO\n">>)
end,
do_net_server_readwrite_common2(Sock, OffsetHex, LenHex, FileBin, DataDir,
FileOpts, DoItFun,
EpochID, Wedged_p, CurrentEpochId,
NoSuchFileFun, BadIoFun).
do_net_server_readwrite_common2(Sock, OffsetHex, LenHex, FileBin, DataDir,
FileOpts, DoItFun,
EpochID, Wedged_p, CurrentEpochId,
NoSuchFileFun, BadIoFun) ->
<<Offset:64/big>> = machi_util:hexstr_to_bin(OffsetHex),
<<Len:32/big>> = machi_util:hexstr_to_bin(LenHex),
{_, Path} = machi_util:make_data_filename(DataDir, FileBin),
OptsHasWrite = lists:member(write, FileOpts),
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OptsHasRead = lists:member(read, FileOpts),
case file:open(Path, FileOpts) of
{ok, FH} ->
try
DoItFun(FH, Offset, Len)
catch
throw:{bad_csum, _CS} ->
ok = gen_tcp:send(Sock, <<"ERROR BAD-CHECKSUM\n">>)
after
file:close(FH)
end;
{error, enoent} when OptsHasWrite ->
do_net_server_readwrite_common(
Sock, OffsetHex, LenHex, FileBin, DataDir,
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FileOpts, DoItFun,
EpochID, Wedged_p, CurrentEpochId);
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{error, enoent} when OptsHasRead ->
Damn ugly HTTP interface "equivalent" for machi_cr_client.erl basic API This goes to show that mixing implementation and protocol and API and lots of other stuff ... is cool for the quick hack to do one thing but really sucks when trying to do more than one thing. * Proof-of-concept only: add HTTP/1.0'ish 'PUT' interface to be the rough equivalent of machi_cr_client:append_chunk/3 * Proof-of-concept only: add HTTP/1.0'ish 'GET' interface to be the rough equivalent of machi_cr_client:read_chunk/4 Example use: `append_chunk` % curl http://127.0.0.1:4444/foo -0 -T /etc/hosts -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > PUT /foo HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > Content-Length: 338 > * We are completely uploaded and fine * HTTP 1.0, assume close after body < HTTP/1.0 201 Created < Location: foo.50EI18AX.21 < X-Offset: 3052 < X-Size: 338 < * Closing connection 0 Example_use: `read_chunk` curl 'http://127.0.0.1:4444/foo.50EI18AX.21?offset=3052&size=338' -0 -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > GET /foo.50EI18AX.21?offset=3052&size=338 HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > * HTTP 1.0, assume close after body < HTTP/1.0 200 OK < Content-Length: 338 < ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 127.0.0.1 test.localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost # Xxxxxxx Yyyyy 192.168.99.222 zzzzz 127.0.0.1 aaaaaaaa.bb.ccccccccc.com * Closing connection 0
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ok = NoSuchFileFun(Sock);
_Else ->
Damn ugly HTTP interface "equivalent" for machi_cr_client.erl basic API This goes to show that mixing implementation and protocol and API and lots of other stuff ... is cool for the quick hack to do one thing but really sucks when trying to do more than one thing. * Proof-of-concept only: add HTTP/1.0'ish 'PUT' interface to be the rough equivalent of machi_cr_client:append_chunk/3 * Proof-of-concept only: add HTTP/1.0'ish 'GET' interface to be the rough equivalent of machi_cr_client:read_chunk/4 Example use: `append_chunk` % curl http://127.0.0.1:4444/foo -0 -T /etc/hosts -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > PUT /foo HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > Content-Length: 338 > * We are completely uploaded and fine * HTTP 1.0, assume close after body < HTTP/1.0 201 Created < Location: foo.50EI18AX.21 < X-Offset: 3052 < X-Size: 338 < * Closing connection 0 Example_use: `read_chunk` curl 'http://127.0.0.1:4444/foo.50EI18AX.21?offset=3052&size=338' -0 -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > GET /foo.50EI18AX.21?offset=3052&size=338 HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > * HTTP 1.0, assume close after body < HTTP/1.0 200 OK < Content-Length: 338 < ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 127.0.0.1 test.localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost # Xxxxxxx Yyyyy 192.168.99.222 zzzzz 127.0.0.1 aaaaaaaa.bb.ccccccccc.com * Closing connection 0
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ok = BadIoFun(Sock)
end.
do_net_server_write(Sock, CSumHex, OffsetHex, LenHex, FileBin, DataDir,
EpochID, Wedged_p, CurrentEpochId) ->
CSumPath = machi_util:make_checksum_filename(DataDir, FileBin),
case file:open(CSumPath, [append, raw, binary, delayed_write]) of
{ok, FHc} ->
do_net_server_write2(Sock, CSumHex, OffsetHex, LenHex, FileBin,
DataDir, FHc, EpochID, Wedged_p,
CurrentEpochId);
{error, enoent} ->
ok = filelib:ensure_dir(CSumPath),
do_net_server_write(Sock, CSumHex, OffsetHex, LenHex, FileBin,
DataDir, EpochID, Wedged_p,
CurrentEpochId)
end.
do_net_server_write2(Sock, CSumHex, OffsetHex, LenHex, FileBin, DataDir, FHc,
EpochID, Wedged_p, CurrentEpochId) ->
ClientCSum = machi_util:hexstr_to_bin(CSumHex),
DoItFun = fun(FHd, Offset, Len) ->
ok = inet:setopts(Sock, [{packet, raw}]),
{ok, Chunk} = gen_tcp:recv(Sock, Len),
CSum = case ClientCSum of
<<?CSUM_TAG_NONE:8, _/binary>> ->
%% TODO: If the client was foolish enough to use
%% this type of non-checksum, then the client gets
%% what it deserves wrt data integrity, alas. In
%% the client-side Chain Replication method, each
%% server will calculated this independently, which
%% isn't exactly what ought to happen for best data
%% integrity checking. In server-side CR, the csum
%% should be calculated by the head and passed down
%% the chain together with the value.
CS = machi_util:checksum_chunk(Chunk),
machi_util:make_tagged_csum(server_gen,CS);
<<?CSUM_TAG_CLIENT_GEN:8, ClientCS/binary>> ->
CS = machi_util:checksum_chunk(Chunk),
if CS == ClientCS ->
ClientCSum;
true ->
throw({bad_csum, CS})
end;
_ ->
ClientCSum
end,
case file:pwrite(FHd, Offset, Chunk) of
ok ->
CSumHex2 = machi_util:bin_to_hexstr(CSum),
CSum_info = [OffsetHex, 32, LenHex, 32,
CSumHex2, 10],
ok = file:write(FHc, CSum_info),
ok = file:close(FHc),
gen_tcp:send(Sock, <<"OK\n">>);
_Else3 ->
machi_util:verb("Else3 ~p ~p ~p\n",
[Offset, Len, _Else3]),
ok = gen_tcp:send(Sock, "ERROR BAD-PWRITE\n")
end
end,
do_net_server_readwrite_common(Sock, OffsetHex, LenHex, FileBin, DataDir,
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[write, read, binary, raw], DoItFun,
EpochID, Wedged_p, CurrentEpochId).
perhaps_do_net_server_ec_read(Sock, FH) ->
case file:pread(FH, 0, ?MINIMUM_OFFSET) of
{ok, Bin} when byte_size(Bin) == ?MINIMUM_OFFSET ->
decode_and_reply_net_server_ec_read(Sock, Bin);
{ok, _AnythingElse} ->
ok = gen_tcp:send(Sock, "ERROR PARTIAL-READ2\n");
_AnythingElse ->
ok = gen_tcp:send(Sock, "ERROR BAD-PREAD\n")
end.
decode_and_reply_net_server_ec_read(Sock, <<"a ", Rest/binary>>) ->
decode_and_reply_net_server_ec_read_version_a(Sock, Rest);
decode_and_reply_net_server_ec_read(Sock, <<0:8, _/binary>>) ->
ok = gen_tcp:send(Sock, <<"ERROR NOT-ERASURE\n">>).
decode_and_reply_net_server_ec_read_version_a(Sock, Rest) ->
%% <<BodyLenHex:4/binary, " ", StripeWidthHex:16/binary, " ",
%% OrigFileLenHex:16/binary, " ", _/binary>> = Rest,
HdrLen = 80 - 2 - 4 - 1,
<<BodyLenHex:4/binary, " ", Hdr:HdrLen/binary, Rest2/binary>> = Rest,
<<BodyLen:16/big>> = machi_util:hexstr_to_bin(BodyLenHex),
<<Body:BodyLen/binary, _/binary>> = Rest2,
ok = gen_tcp:send(Sock, ["ERASURE ", BodyLenHex, " ", Hdr, Body]).
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do_net_server_listing(Sock, DataDir, S) ->
{Wedged_p, _CurrentEpochId} = ets:lookup_element(S#state.etstab, epoch, 2),
if Wedged_p ->
ok = gen_tcp:send(Sock, <<"ERROR WEDGED\n">>);
true ->
do_net_server_listing2(Sock, DataDir)
end.
do_net_server_listing2(Sock, DataDir) ->
{_, WildPath} = machi_util:make_data_filename(DataDir, ""),
Files = filelib:wildcard("*", WildPath),
Out = ["OK\n",
[begin
{ok, FI} = file:read_file_info(WildPath ++ "/" ++ File),
Size = FI#file_info.size,
SizeBin = <<Size:64/big>>,
[machi_util:bin_to_hexstr(SizeBin), <<" ">>,
list_to_binary(File), <<"\n">>]
end || File <- Files],
".\n"
],
ok = gen_tcp:send(Sock, Out).
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do_net_server_checksum_listing(Sock, File, DataDir, S) ->
{Wedged_p, _CurrentEpochId} = ets:lookup_element(S#state.etstab, epoch, 2),
case {Wedged_p, sanitize_file_string(File)} of
{true, _} ->
ok = gen_tcp:send(Sock, <<"ERROR WEDGED\n">>);
{false, ok} ->
do_net_server_checksum_listing2(Sock, File, DataDir);
_ ->
ok = gen_tcp:send(Sock, <<"ERROR BAD-ARG\n">>)
end.
do_net_server_checksum_listing2(Sock, File, DataDir) ->
ok = sync_checksum_file(File),
CSumPath = machi_util:make_checksum_filename(DataDir, File),
case file:open(CSumPath, [read, raw, binary]) of
{ok, FH} ->
{ok, FI} = file:read_file_info(CSumPath),
Len = FI#file_info.size,
LenHex = list_to_binary(machi_util:bin_to_hexstr(<<Len:64/big>>)),
%% Client has option of line-by-line with "." terminator,
%% or using the offset in the OK message to slurp things
%% down by exact byte size.
ok = gen_tcp:send(Sock, [<<"OK ">>, LenHex, <<"\n">>]),
do_net_copy_bytes(FH, Sock),
ok = file:close(FH),
ok = gen_tcp:send(Sock, ".\n");
{error, enoent} ->
ok = gen_tcp:send(Sock, "ERROR NO-SUCH-FILE\n");
_ ->
ok = gen_tcp:send(Sock, "ERROR\n")
end.
sync_checksum_file(File) ->
Prefix = re:replace(File, "\\..*", "", [{return, binary}]),
case write_server_find_pid(Prefix) of
undefined ->
ok;
Pid ->
Ref = make_ref(),
Pid ! {sync_stuff, self(), Ref},
receive
{sync_finished, Ref} ->
ok
after 5000 ->
case write_server_find_pid(Prefix) of
undefined ->
ok;
Pid2 when Pid2 /= Pid ->
ok;
_Pid2 ->
error
end
end
end.
do_net_copy_bytes(FH, Sock) ->
case file:read(FH, 1024*1024) of
{ok, Bin} ->
ok = gen_tcp:send(Sock, Bin),
do_net_copy_bytes(FH, Sock);
eof ->
ok
end.
do_net_server_delete_migration_only(Sock, File, DataDir) ->
case sanitize_file_string(File) of
ok ->
do_net_server_delete_migration_only2(Sock, File, DataDir);
_ ->
ok = gen_tcp:send(Sock, <<"ERROR BAD-ARG\n">>)
end.
do_net_server_delete_migration_only2(Sock, File, DataDir) ->
{_, Path} = machi_util:make_data_filename(DataDir, File),
case file:delete(Path) of
ok ->
ok = gen_tcp:send(Sock, "OK\n");
{error, enoent} ->
ok = gen_tcp:send(Sock, "ERROR NO-SUCH-FILE\n");
_ ->
ok = gen_tcp:send(Sock, "ERROR\n")
end.
do_net_server_truncate_hackityhack(Sock, File, DataDir) ->
case sanitize_file_string(File) of
ok ->
do_net_server_truncate_hackityhack2(Sock, File, DataDir);
_ ->
ok = gen_tcp:send(Sock, <<"ERROR BAD-ARG\n">>)
end.
do_net_server_truncate_hackityhack2(Sock, File, DataDir) ->
{_, Path} = machi_util:make_data_filename(DataDir, File),
case file:open(Path, [read, write, binary, raw]) of
{ok, FH} ->
try
{ok, ?MINIMUM_OFFSET} = file:position(FH, ?MINIMUM_OFFSET),
ok = file:truncate(FH),
ok = gen_tcp:send(Sock, "OK\n")
after
file:close(FH)
end;
{error, enoent} ->
ok = gen_tcp:send(Sock, "ERROR NO-SUCH-FILE\n");
_ ->
ok = gen_tcp:send(Sock, "ERROR\n")
end.
write_server_get_pid(Prefix, DataDir, LinkPid) ->
case write_server_find_pid(Prefix) of
undefined ->
start_seq_append_server(Prefix, DataDir, LinkPid),
timer:sleep(1),
write_server_get_pid(Prefix, DataDir, LinkPid);
Pid ->
Pid
end.
write_server_find_pid(Prefix) ->
FluName = machi_util:make_regname(Prefix),
whereis(FluName).
start_seq_append_server(Prefix, DataDir, AppendServerPid) ->
proc_lib:spawn_link(fun() ->
%% The following is only necessary to
%% make nice process relationships in
%% 'appmon' and related tools.
put('$ancestors', [AppendServerPid]),
put('$initial_call', {x,y,3}),
link(AppendServerPid),
run_seq_append_server(Prefix, DataDir)
end).
run_seq_append_server(Prefix, DataDir) ->
true = register(machi_util:make_regname(Prefix), self()),
run_seq_append_server2(Prefix, DataDir).
run_seq_append_server2(Prefix, DataDir) ->
FileNum = machi_util:read_max_filenum(DataDir, Prefix) + 1,
case machi_util:increment_max_filenum(DataDir, Prefix) of
ok ->
machi_util:increment_max_filenum(DataDir, Prefix),
machi_util:info_msg("start: ~p server at file ~w\n",
[Prefix, FileNum]),
seq_append_server_loop(DataDir, Prefix, FileNum);
Else ->
error_logger:error_msg("start: ~p server at file ~w: ~p\n",
[Prefix, FileNum, Else]),
exit(Else)
end.
-spec seq_name_hack() -> string().
seq_name_hack() ->
lists:flatten(io_lib:format("~.36B~.36B",
[element(3,now()),
list_to_integer(os:getpid())])).
seq_append_server_loop(DataDir, Prefix, FileNum) ->
SequencerNameHack = seq_name_hack(),
{File, FullPath} = machi_util:make_data_filename(
DataDir, Prefix, SequencerNameHack, FileNum),
{ok, FHd} = file:open(FullPath,
[write, binary, raw]),
%% [write, binary, raw, delayed_write]),
CSumPath = machi_util:make_checksum_filename(
DataDir, Prefix, SequencerNameHack, FileNum),
{ok, FHc} = file:open(CSumPath, [append, raw, binary, delayed_write]),
seq_append_server_loop(DataDir, Prefix, File, {FHd,FHc}, FileNum,
?MINIMUM_OFFSET).
seq_append_server_loop(DataDir, Prefix, _File, {FHd,FHc}, FileNum, Offset)
when Offset > ?MAX_FILE_SIZE ->
ok = file:close(FHd),
ok = file:close(FHc),
machi_util:info_msg("rollover: ~p server at file ~w offset ~w\n",
[Prefix, FileNum, Offset]),
run_seq_append_server2(Prefix, DataDir);
seq_append_server_loop(DataDir, Prefix, File, {FHd,FHc}=FH_, FileNum, Offset) ->
receive
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{seq_append, From, Prefix, Chunk, CSum, Extra} ->
if Chunk /= <<>> ->
ok = file:pwrite(FHd, Offset, Chunk);
true ->
ok
end,
From ! {assignment, Offset, File},
Len = byte_size(Chunk),
OffsetHex = machi_util:bin_to_hexstr(<<Offset:64/big>>),
LenHex = machi_util:bin_to_hexstr(<<Len:32/big>>),
CSumHex = machi_util:bin_to_hexstr(CSum),
CSum_info = [OffsetHex, 32, LenHex, 32, CSumHex, 10],
ok = file:write(FHc, CSum_info),
seq_append_server_loop(DataDir, Prefix, File, FH_,
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FileNum, Offset + Len + Extra);
{sync_stuff, FromPid, Ref} ->
file:sync(FHc),
FromPid ! {sync_finished, Ref},
seq_append_server_loop(DataDir, Prefix, File, FH_,
FileNum, Offset)
after 30*1000 ->
ok = file:close(FHd),
ok = file:close(FHc),
machi_util:info_msg("stop: ~p server ~p at file ~w offset ~w\n",
[Prefix, self(), FileNum, Offset]),
exit(normal)
end.
do_projection_command(Sock, LenHex, S) ->
try
Len = machi_util:hexstr_to_int(LenHex),
ok = inet:setopts(Sock, [{packet, raw}]),
{ok, ProjCmdBin} = gen_tcp:recv(Sock, Len),
ok = inet:setopts(Sock, [{packet, line}]),
ProjCmd = binary_to_term(ProjCmdBin),
put(hack, ProjCmd),
Res = handle_projection_command(ProjCmd, S),
ResBin = term_to_binary(Res),
ResLenHex = machi_util:int_to_hexbin(byte_size(ResBin), 32),
ok = gen_tcp:send(Sock, [<<"OK ">>, ResLenHex, <<"\n">>, ResBin])
catch
What:Why ->
io:format(user, "OOPS ~p\n", [get(hack)]),
io:format(user, "OOPS ~p ~p ~p\n", [What, Why, erlang:get_stacktrace()]),
WHA = list_to_binary(io_lib:format("TODO-YOLO.~w:~w-~w",
[What, Why, erlang:get_stacktrace()])),
_ = (catch gen_tcp:send(Sock, [<<"ERROR ">>, WHA, <<"\n">>]))
end.
handle_projection_command({get_latest_epochid, ProjType},
#state{proj_store=ProjStore}) ->
machi_projection_store:get_latest_epochid(ProjStore, ProjType);
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handle_projection_command({read_latest_projection, ProjType},
#state{proj_store=ProjStore}) ->
machi_projection_store:read_latest_projection(ProjStore, ProjType);
handle_projection_command({read_projection, ProjType, Epoch},
#state{proj_store=ProjStore}) ->
machi_projection_store:read(ProjStore, ProjType, Epoch);
handle_projection_command({write_projection, ProjType, Proj},
#state{proj_store=ProjStore}) ->
machi_projection_store:write(ProjStore, ProjType, Proj);
handle_projection_command({get_all_projections, ProjType},
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#state{proj_store=ProjStore}) ->
machi_projection_store:get_all_projections(ProjStore, ProjType);
handle_projection_command({list_all_projections, ProjType},
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#state{proj_store=ProjStore}) ->
machi_projection_store:list_all_projections(ProjStore, ProjType);
handle_projection_command(Else, _S) ->
{error, unknown_cmd, Else}.
make_listener_regname(BaseName) ->
list_to_atom(atom_to_list(BaseName) ++ "_listener").
2015-05-02 07:59:28 +00:00
%% This is the name of the projection store that is spawned by the
%% *flu*, for use primarily in testing scenarios. In normal use, we
%% ought to be using the OTP style of managing processes, via
%% supervisors, namely via machi_flu_psup.erl, which uses a
%% *different* naming convention for the projection store name that it
%% registers.
make_projection_server_regname(BaseName) ->
list_to_atom(atom_to_list(BaseName) ++ "_pstore2").
Damn ugly HTTP interface "equivalent" for machi_cr_client.erl basic API This goes to show that mixing implementation and protocol and API and lots of other stuff ... is cool for the quick hack to do one thing but really sucks when trying to do more than one thing. * Proof-of-concept only: add HTTP/1.0'ish 'PUT' interface to be the rough equivalent of machi_cr_client:append_chunk/3 * Proof-of-concept only: add HTTP/1.0'ish 'GET' interface to be the rough equivalent of machi_cr_client:read_chunk/4 Example use: `append_chunk` % curl http://127.0.0.1:4444/foo -0 -T /etc/hosts -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > PUT /foo HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > Content-Length: 338 > * We are completely uploaded and fine * HTTP 1.0, assume close after body < HTTP/1.0 201 Created < Location: foo.50EI18AX.21 < X-Offset: 3052 < X-Size: 338 < * Closing connection 0 Example_use: `read_chunk` curl 'http://127.0.0.1:4444/foo.50EI18AX.21?offset=3052&size=338' -0 -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > GET /foo.50EI18AX.21?offset=3052&size=338 HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > * HTTP 1.0, assume close after body < HTTP/1.0 200 OK < Content-Length: 338 < ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 127.0.0.1 test.localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost # Xxxxxxx Yyyyy 192.168.99.222 zzzzz 127.0.0.1 aaaaaaaa.bb.ccccccccc.com * Closing connection 0
2015-05-22 08:40:53 +00:00
http_server_hack(FluName, Line1, Sock, S) ->
{ok, {http_request, HttpOp, URI0, _HttpV}, _x} =
erlang:decode_packet(http_bin, Line1, [{line_length,4095}]),
MyURI = case URI0 of
{abs_path, Path} -> <<"/", Rest/binary>> = Path,
Rest;
_ -> URI0
end,
Hdrs = http_harvest_headers(Sock),
G = digest_header_goop(Hdrs, #http_goop{}),
case HttpOp of
'PUT' ->
http_server_hack_put(Sock, G, FluName, MyURI);
'GET' ->
http_server_hack_get(Sock, G, FluName, MyURI, S)
end,
ok = gen_tcp:close(Sock),
exit(normal).
http_server_hack_put(Sock, G, FluName, MyURI) ->
ok = inet:setopts(Sock, [{packet, raw}]),
{ok, Chunk} = gen_tcp:recv(Sock, G#http_goop.len, 60*1000),
CSum0 = machi_util:checksum_chunk(Chunk),
Damn ugly HTTP interface "equivalent" for machi_cr_client.erl basic API This goes to show that mixing implementation and protocol and API and lots of other stuff ... is cool for the quick hack to do one thing but really sucks when trying to do more than one thing. * Proof-of-concept only: add HTTP/1.0'ish 'PUT' interface to be the rough equivalent of machi_cr_client:append_chunk/3 * Proof-of-concept only: add HTTP/1.0'ish 'GET' interface to be the rough equivalent of machi_cr_client:read_chunk/4 Example use: `append_chunk` % curl http://127.0.0.1:4444/foo -0 -T /etc/hosts -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > PUT /foo HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > Content-Length: 338 > * We are completely uploaded and fine * HTTP 1.0, assume close after body < HTTP/1.0 201 Created < Location: foo.50EI18AX.21 < X-Offset: 3052 < X-Size: 338 < * Closing connection 0 Example_use: `read_chunk` curl 'http://127.0.0.1:4444/foo.50EI18AX.21?offset=3052&size=338' -0 -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > GET /foo.50EI18AX.21?offset=3052&size=338 HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > * HTTP 1.0, assume close after body < HTTP/1.0 200 OK < Content-Length: 338 < ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 127.0.0.1 test.localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost # Xxxxxxx Yyyyy 192.168.99.222 zzzzz 127.0.0.1 aaaaaaaa.bb.ccccccccc.com * Closing connection 0
2015-05-22 08:40:53 +00:00
try
CSum = case G#http_goop.x_csum of
undefined ->
machi_util:make_tagged_csum(server_gen, CSum0);
XX when is_binary(XX) ->
if XX == CSum0 ->
machi_util:make_tagged_csum(client_gen, CSum0);
true ->
throw({bad_csum, XX})
end
end,
Damn ugly HTTP interface "equivalent" for machi_cr_client.erl basic API This goes to show that mixing implementation and protocol and API and lots of other stuff ... is cool for the quick hack to do one thing but really sucks when trying to do more than one thing. * Proof-of-concept only: add HTTP/1.0'ish 'PUT' interface to be the rough equivalent of machi_cr_client:append_chunk/3 * Proof-of-concept only: add HTTP/1.0'ish 'GET' interface to be the rough equivalent of machi_cr_client:read_chunk/4 Example use: `append_chunk` % curl http://127.0.0.1:4444/foo -0 -T /etc/hosts -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > PUT /foo HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > Content-Length: 338 > * We are completely uploaded and fine * HTTP 1.0, assume close after body < HTTP/1.0 201 Created < Location: foo.50EI18AX.21 < X-Offset: 3052 < X-Size: 338 < * Closing connection 0 Example_use: `read_chunk` curl 'http://127.0.0.1:4444/foo.50EI18AX.21?offset=3052&size=338' -0 -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > GET /foo.50EI18AX.21?offset=3052&size=338 HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > * HTTP 1.0, assume close after body < HTTP/1.0 200 OK < Content-Length: 338 < ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 127.0.0.1 test.localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost # Xxxxxxx Yyyyy 192.168.99.222 zzzzz 127.0.0.1 aaaaaaaa.bb.ccccccccc.com * Closing connection 0
2015-05-22 08:40:53 +00:00
FluName ! {seq_append, self(), MyURI, Chunk, CSum, 0}
catch
throw:{bad_csum, _CS} ->
Out = "HTTP/1.0 412 Precondition failed\r\n"
"X-Reason: bad checksum\r\n\r\n",
ok = gen_tcp:send(Sock, Out),
ok = gen_tcp:close(Sock),
exit(normal);
error:badarg ->
Damn ugly HTTP interface "equivalent" for machi_cr_client.erl basic API This goes to show that mixing implementation and protocol and API and lots of other stuff ... is cool for the quick hack to do one thing but really sucks when trying to do more than one thing. * Proof-of-concept only: add HTTP/1.0'ish 'PUT' interface to be the rough equivalent of machi_cr_client:append_chunk/3 * Proof-of-concept only: add HTTP/1.0'ish 'GET' interface to be the rough equivalent of machi_cr_client:read_chunk/4 Example use: `append_chunk` % curl http://127.0.0.1:4444/foo -0 -T /etc/hosts -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > PUT /foo HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > Content-Length: 338 > * We are completely uploaded and fine * HTTP 1.0, assume close after body < HTTP/1.0 201 Created < Location: foo.50EI18AX.21 < X-Offset: 3052 < X-Size: 338 < * Closing connection 0 Example_use: `read_chunk` curl 'http://127.0.0.1:4444/foo.50EI18AX.21?offset=3052&size=338' -0 -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > GET /foo.50EI18AX.21?offset=3052&size=338 HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > * HTTP 1.0, assume close after body < HTTP/1.0 200 OK < Content-Length: 338 < ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 127.0.0.1 test.localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost # Xxxxxxx Yyyyy 192.168.99.222 zzzzz 127.0.0.1 aaaaaaaa.bb.ccccccccc.com * Closing connection 0
2015-05-22 08:40:53 +00:00
error_logger:error_msg("Message send to ~p gave badarg, make certain server is running with correct registered name\n", [?MODULE])
end,
receive
{assignment, Offset, File} ->
Msg = io_lib:format("HTTP/1.0 201 Created\r\nLocation: ~s\r\n"
Damn ugly HTTP interface "equivalent" for machi_cr_client.erl basic API This goes to show that mixing implementation and protocol and API and lots of other stuff ... is cool for the quick hack to do one thing but really sucks when trying to do more than one thing. * Proof-of-concept only: add HTTP/1.0'ish 'PUT' interface to be the rough equivalent of machi_cr_client:append_chunk/3 * Proof-of-concept only: add HTTP/1.0'ish 'GET' interface to be the rough equivalent of machi_cr_client:read_chunk/4 Example use: `append_chunk` % curl http://127.0.0.1:4444/foo -0 -T /etc/hosts -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > PUT /foo HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > Content-Length: 338 > * We are completely uploaded and fine * HTTP 1.0, assume close after body < HTTP/1.0 201 Created < Location: foo.50EI18AX.21 < X-Offset: 3052 < X-Size: 338 < * Closing connection 0 Example_use: `read_chunk` curl 'http://127.0.0.1:4444/foo.50EI18AX.21?offset=3052&size=338' -0 -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > GET /foo.50EI18AX.21?offset=3052&size=338 HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > * HTTP 1.0, assume close after body < HTTP/1.0 200 OK < Content-Length: 338 < ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 127.0.0.1 test.localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost # Xxxxxxx Yyyyy 192.168.99.222 zzzzz 127.0.0.1 aaaaaaaa.bb.ccccccccc.com * Closing connection 0
2015-05-22 08:40:53 +00:00
"X-Offset: ~w\r\nX-Size: ~w\r\n\r\n",
[File, Offset, byte_size(Chunk)]),
ok = gen_tcp:send(Sock, Msg);
Damn ugly HTTP interface "equivalent" for machi_cr_client.erl basic API This goes to show that mixing implementation and protocol and API and lots of other stuff ... is cool for the quick hack to do one thing but really sucks when trying to do more than one thing. * Proof-of-concept only: add HTTP/1.0'ish 'PUT' interface to be the rough equivalent of machi_cr_client:append_chunk/3 * Proof-of-concept only: add HTTP/1.0'ish 'GET' interface to be the rough equivalent of machi_cr_client:read_chunk/4 Example use: `append_chunk` % curl http://127.0.0.1:4444/foo -0 -T /etc/hosts -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > PUT /foo HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > Content-Length: 338 > * We are completely uploaded and fine * HTTP 1.0, assume close after body < HTTP/1.0 201 Created < Location: foo.50EI18AX.21 < X-Offset: 3052 < X-Size: 338 < * Closing connection 0 Example_use: `read_chunk` curl 'http://127.0.0.1:4444/foo.50EI18AX.21?offset=3052&size=338' -0 -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > GET /foo.50EI18AX.21?offset=3052&size=338 HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > * HTTP 1.0, assume close after body < HTTP/1.0 200 OK < Content-Length: 338 < ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 127.0.0.1 test.localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost # Xxxxxxx Yyyyy 192.168.99.222 zzzzz 127.0.0.1 aaaaaaaa.bb.ccccccccc.com * Closing connection 0
2015-05-22 08:40:53 +00:00
wedged ->
ok = gen_tcp:send(Sock, <<"HTTP/1.0 499 WEDGED\r\n\r\n">>)
after 10*1000 ->
ok = gen_tcp:send(Sock, <<"HTTP/1.0 499 TIMEOUT\r\n\r\n">>)
end.
http_server_hack_get(Sock, _G, _FluName, MyURI, S) ->
DataDir = S#state.data_dir,
{Wedged_p, CurrentEpochId} = ets:lookup_element(S#state.etstab, epoch, 2),
EpochID = <<"unused">>,
NoSuchFileFun = fun(Sck) ->
ok = gen_tcp:send(Sck, "HTTP/1.0 455 NOT-WRITTEN\r\n\r\n")
end,
BadIoFun = fun(Sck) ->
ok = gen_tcp:send(Sck, "HTTP/1.0 466 BAD-IO\r\n\r\n")
end,
DoItFun = fun(FH, Offset, Len) ->
case file:pread(FH, Offset, Len) of
{ok, Bytes} when byte_size(Bytes) == Len ->
Hdrs = io_lib:format("HTTP/1.0 200 OK\r\nContent-Length: ~w\r\n\r\n", [Len]),
gen_tcp:send(Sock, [Hdrs, Bytes]);
{ok, Bytes} ->
machi_util:verb("ok read but wanted ~p got ~p: ~p @ offset ~p\n",
[Len, size(Bytes), Bytes, Offset]),
ok = gen_tcp:send(Sock, "HTTP/1.0 455 PARTIAL-READ\r\n\r\n");
eof ->
ok = gen_tcp:send(Sock, "HTTP/1.0 455 NOT-WRITTEN\r\n\r\n");
_Else2 ->
machi_util:verb("Else2 ~p ~p ~P\n",
[Offset, Len, _Else2, 20]),
ok = gen_tcp:send(Sock, "HTTP/1.0 466 ERROR BAD-READ\r\n\r\n")
end
end,
[File, OptsBin] = binary:split(MyURI, <<"?">>),
Opts = split_uri_options(OptsBin),
OffsetHex = machi_util:int_to_hexstr(proplists:get_value(offset, Opts), 64),
LenHex = machi_util:int_to_hexstr(proplists:get_value(size, Opts), 32),
do_net_server_readwrite_common2(Sock, OffsetHex, LenHex, File, DataDir,
[read, binary, raw], DoItFun,
EpochID, Wedged_p, CurrentEpochId,
NoSuchFileFun, BadIoFun).
http_harvest_headers(Sock) ->
ok = inet:setopts(Sock, [{packet, httph}]),
http_harvest_headers(gen_tcp:recv(Sock, 0, ?SERVER_CMD_READ_TIMEOUT),
Sock, []).
http_harvest_headers({ok, http_eoh}, _Sock, Acc) ->
Acc;
http_harvest_headers({error, _}, _Sock, _Acc) ->
[];
http_harvest_headers({ok, Hdr}, Sock, Acc) ->
http_harvest_headers(gen_tcp:recv(Sock, 0, ?SERVER_CMD_READ_TIMEOUT),
Sock, [Hdr|Acc]).
protocol_buffers_loop(Sock, S) ->
case gen_tcp:recv(Sock, 0) of
{ok, _Bin} ->
R = #mpb_response{req_id= <<"not paying any attention">>,
generic=#mpb_errorresp{code=-6,
msg="not implemented"}},
Resp = machi_pb:encode_mpb_response(R),
ok = gen_tcp:send(Sock, Resp),
protocol_buffers_loop(Sock, S);
{error, _} ->
(catch gen_tcp:close(Sock)),
exit(normal)
end.
Damn ugly HTTP interface "equivalent" for machi_cr_client.erl basic API This goes to show that mixing implementation and protocol and API and lots of other stuff ... is cool for the quick hack to do one thing but really sucks when trying to do more than one thing. * Proof-of-concept only: add HTTP/1.0'ish 'PUT' interface to be the rough equivalent of machi_cr_client:append_chunk/3 * Proof-of-concept only: add HTTP/1.0'ish 'GET' interface to be the rough equivalent of machi_cr_client:read_chunk/4 Example use: `append_chunk` % curl http://127.0.0.1:4444/foo -0 -T /etc/hosts -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > PUT /foo HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > Content-Length: 338 > * We are completely uploaded and fine * HTTP 1.0, assume close after body < HTTP/1.0 201 Created < Location: foo.50EI18AX.21 < X-Offset: 3052 < X-Size: 338 < * Closing connection 0 Example_use: `read_chunk` curl 'http://127.0.0.1:4444/foo.50EI18AX.21?offset=3052&size=338' -0 -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > GET /foo.50EI18AX.21?offset=3052&size=338 HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > * HTTP 1.0, assume close after body < HTTP/1.0 200 OK < Content-Length: 338 < ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 127.0.0.1 test.localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost # Xxxxxxx Yyyyy 192.168.99.222 zzzzz 127.0.0.1 aaaaaaaa.bb.ccccccccc.com * Closing connection 0
2015-05-22 08:40:53 +00:00
digest_header_goop([], G) ->
G;
digest_header_goop([{http_header, _, 'Content-Length', _, Str}|T], G) ->
digest_header_goop(T, G#http_goop{len=list_to_integer(Str)});
digest_header_goop([{http_header, _, "X-Checksum", _, Str}|T], G) ->
SHA = machi_util:hexstr_to_bin(Str),
CSum = machi_util:make_tagged_csum(client_gen, SHA),
digest_header_goop(T, G#http_goop{x_csum=CSum});
Damn ugly HTTP interface "equivalent" for machi_cr_client.erl basic API This goes to show that mixing implementation and protocol and API and lots of other stuff ... is cool for the quick hack to do one thing but really sucks when trying to do more than one thing. * Proof-of-concept only: add HTTP/1.0'ish 'PUT' interface to be the rough equivalent of machi_cr_client:append_chunk/3 * Proof-of-concept only: add HTTP/1.0'ish 'GET' interface to be the rough equivalent of machi_cr_client:read_chunk/4 Example use: `append_chunk` % curl http://127.0.0.1:4444/foo -0 -T /etc/hosts -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > PUT /foo HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > Content-Length: 338 > * We are completely uploaded and fine * HTTP 1.0, assume close after body < HTTP/1.0 201 Created < Location: foo.50EI18AX.21 < X-Offset: 3052 < X-Size: 338 < * Closing connection 0 Example_use: `read_chunk` curl 'http://127.0.0.1:4444/foo.50EI18AX.21?offset=3052&size=338' -0 -v * Hostname was NOT found in DNS cache * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 4444 (#0) > GET /foo.50EI18AX.21?offset=3052&size=338 HTTP/1.0 > User-Agent: curl/7.37.1 > Host: 127.0.0.1:4444 > Accept: */* > * HTTP 1.0, assume close after body < HTTP/1.0 200 OK < Content-Length: 338 < ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 127.0.0.1 test.localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost # Xxxxxxx Yyyyy 192.168.99.222 zzzzz 127.0.0.1 aaaaaaaa.bb.ccccccccc.com * Closing connection 0
2015-05-22 08:40:53 +00:00
digest_header_goop([_H|T], G) ->
digest_header_goop(T, G).
split_uri_options(OpsBin) ->
L = binary:split(OpsBin, <<"&">>),
[case binary:split(X, <<"=">>) of
[<<"offset">>, Bin] ->
{offset, binary_to_integer(Bin)};
[<<"size">>, Bin] ->
{size, binary_to_integer(Bin)}
end || X <- L].