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%%
%% Licensed to the Apache Software Foundation (ASF) under one
%% or more contributor license agreements. See the NOTICE file
%% distributed with this work for additional information
%% regarding copyright ownership. The ASF licenses this file
%% 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.
%%
-module(thrift_socket_transport).
-behaviour(thrift_transport).
%% constructors
-export([new/1, new/2]).
%% transport callbacks
-export([read/2, read_exact/2, write/2, flush/1, close/1]).
%% legacy api
-export([new_transport_factory/3]).
-record(t_socket, {
socket,
recv_timeout=60000,
buffer = []
}).
-type state() :: #t_socket{}.
-spec new(Socket::any()) ->
thrift_transport:t_transport().
new(Socket) -> new(Socket, []).
-spec new(Socket::any(), Opts::list()) ->
thrift_transport:t_transport().
new(Socket, Opts) when is_list(Opts) ->
State = parse_opts(Opts, #t_socket{socket = Socket}),
thrift_transport:new(?MODULE, State).
parse_opts([{recv_timeout, Timeout}|Rest], State)
when is_integer(Timeout), Timeout > 0 ->
parse_opts(Rest, State#t_socket{recv_timeout = Timeout});
parse_opts([{recv_timeout, infinity}|Rest], State) ->
parse_opts(Rest, State#t_socket{recv_timeout = infinity});
parse_opts([], State) ->
State.
-include("thrift_transport_behaviour.hrl").
read(State = #t_socket{buffer = Buf}, Len)
when is_integer(Len), Len >= 0 ->
Binary = iolist_to_binary(Buf),
case iolist_size(Binary) of
X when X >= Len ->
{Result, Remaining} = split_binary(Binary, Len),
{State#t_socket{buffer = Remaining}, {ok, Result}};
_ -> recv(State, Len)
end.
recv(State = #t_socket{socket = Socket, buffer = Buf}, Len) ->
case gen_tcp:recv(Socket, 0, State#t_socket.recv_timeout) of
{error, Error} ->
gen_tcp:close(Socket),
{State, {error, Error}};
{ok, Data} ->
Binary = iolist_to_binary([Buf, Data]),
Give = min(iolist_size(Binary), Len),
{Result, Remaining} = split_binary(Binary, Give),
{State#t_socket{buffer = Remaining}, {ok, Result}}
end.
read_exact(State = #t_socket{buffer = Buf}, Len)
when is_integer(Len), Len >= 0 ->
Binary = iolist_to_binary(Buf),
case iolist_size(Binary) of
X when X >= Len -> read(State, Len);
X ->
case gen_tcp:recv(State#t_socket.socket, Len - X, State#t_socket.recv_timeout) of
{error, Error} ->
gen_tcp:close(State#t_socket.socket),
{State, {error, Error}};
{ok, Data} ->
{State#t_socket{buffer = []}, {ok, <<Binary/binary, Data/binary>>}}
end
end.
write(State = #t_socket{socket = Socket}, Data) ->
case gen_tcp:send(Socket, Data) of
{error, Error} ->
gen_tcp:close(Socket),
{State, {error, Error}};
ok -> {State, ok}
end.
flush(State) ->
{State#t_socket{buffer = []}, ok}.
close(State = #t_socket{socket = Socket}) ->
{State, gen_tcp:close(Socket)}.
%% legacy api. left for compatibility
%% The following "local" record is filled in by parse_factory_options/2
%% below. These options can be passed to new_protocol_factory/3 in a
%% proplists-style option list. They're parsed like this so it is an O(n)
%% operation instead of O(n^2)
-record(factory_opts, {
connect_timeout = infinity,
sockopts = [],
framed = false
}).
parse_factory_options([], FactoryOpts, TransOpts) -> {FactoryOpts, TransOpts};
parse_factory_options([{framed, Bool}|Rest], FactoryOpts, TransOpts)
when is_boolean(Bool) ->
parse_factory_options(Rest, FactoryOpts#factory_opts{framed = Bool}, TransOpts);
parse_factory_options([{sockopts, OptList}|Rest], FactoryOpts, TransOpts)
when is_list(OptList) ->
parse_factory_options(Rest, FactoryOpts#factory_opts{sockopts = OptList}, TransOpts);
parse_factory_options([{connect_timeout, TO}|Rest], FactoryOpts, TransOpts)
when TO =:= infinity; is_integer(TO) ->
parse_factory_options(Rest, FactoryOpts#factory_opts{connect_timeout = TO}, TransOpts);
parse_factory_options([{recv_timeout, TO}|Rest], FactoryOpts, TransOpts)
when TO =:= infinity; is_integer(TO) ->
parse_factory_options(Rest, FactoryOpts, [{recv_timeout, TO}] ++ TransOpts).
%% Generates a "transport factory" function - a fun which returns a thrift_transport()
%% instance.
%% State can be passed into a protocol factory to generate a connection to a
%% thrift server over a socket.
new_transport_factory(Host, Port, Options) ->
{FactoryOpts, TransOpts} = parse_factory_options(Options, #factory_opts{}, []),
{ok, fun() -> SockOpts = [binary,
{packet, 0},
{active, false},
{nodelay, true}|FactoryOpts#factory_opts.sockopts
],
case catch gen_tcp:connect(
Host,
Port,
SockOpts,
FactoryOpts#factory_opts.connect_timeout
) of
{ok, Sock} ->
{ok, Transport} = thrift_socket_transport:new(Sock, TransOpts),
{ok, BufTransport} = case FactoryOpts#factory_opts.framed of
true -> thrift_framed_transport:new(Transport);
false -> thrift_buffered_transport:new(Transport)
end,
{ok, BufTransport};
Error -> Error
end
end}.
|
