1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
%% Copyright (c) 2012-2017, Loïc Hoguin <[email protected]>
%%
%% Permission to use, copy, modify, and/or distribute this software for any
%% purpose with or without fee is hereby granted, provided that the above
%% copyright notice and this permission notice appear in all copies.
%%
%% THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
%% WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
%% MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
%% ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
%% WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
%% ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
%% OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-module(ranch_transport).
-export([sendfile/6]).
-type socket() :: any().
-type opts() :: any().
-type stats() :: any().
-type sendfile_opts() :: [{chunk_size, non_neg_integer()}].
-export_type([sendfile_opts/0]).
-callback name() -> atom().
-callback secure() -> boolean().
-callback messages() -> {OK::atom(), Closed::atom(), Error::atom()}.
-callback listen(opts()) -> {ok, socket()} | {error, atom()}.
-callback accept(socket(), timeout())
-> {ok, socket()} | {error, closed | timeout | atom()}.
-callback accept_ack(socket(), timeout()) -> ok.
-callback connect(string(), inet:port_number(), opts())
-> {ok, socket()} | {error, atom()}.
-callback connect(string(), inet:port_number(), opts(), timeout())
-> {ok, socket()} | {error, atom()}.
-callback recv(socket(), non_neg_integer(), timeout())
-> {ok, any()} | {error, closed | timeout | atom()}.
-callback send(socket(), iodata()) -> ok | {error, atom()}.
-callback sendfile(socket(), file:name() | file:fd())
-> {ok, non_neg_integer()} | {error, atom()}.
-callback sendfile(socket(), file:name() | file:fd(), non_neg_integer(),
non_neg_integer()) -> {ok, non_neg_integer()} | {error, atom()}.
-callback sendfile(socket(), file:name() | file:fd(), non_neg_integer(),
non_neg_integer(), sendfile_opts())
-> {ok, non_neg_integer()} | {error, atom()}.
-callback setopts(socket(), opts()) -> ok | {error, atom()}.
-callback getopts(socket(), [atom()]) -> {ok, opts()} | {error, atom()}.
-callback getstat(socket()) -> {ok, stats()} | {error, atom()}.
-callback getstat(socket(), [atom()]) -> {ok, stats()} | {error, atom()}.
-callback controlling_process(socket(), pid())
-> ok | {error, closed | not_owner | atom()}.
-callback peername(socket())
-> {ok, {inet:ip_address(), inet:port_number()}} | {error, atom()}.
-callback sockname(socket())
-> {ok, {inet:ip_address(), inet:port_number()}} | {error, atom()}.
-callback shutdown(socket(), read | write | read_write)
-> ok | {error, atom()}.
-callback close(socket()) -> ok.
%% A fallback for transports that don't have a native sendfile implementation.
%% Note that the ordering of arguments is different from file:sendfile/5 and
%% that this function accepts either a raw file or a file name.
-spec sendfile(module(), socket(), file:filename_all() | file:fd(),
non_neg_integer(), non_neg_integer(), sendfile_opts())
-> {ok, non_neg_integer()} | {error, atom()}.
sendfile(Transport, Socket, Filename, Offset, Bytes, Opts)
when is_list(Filename) orelse is_atom(Filename)
orelse is_binary(Filename) ->
ChunkSize = chunk_size(Opts),
case file:open(Filename, [read, raw, binary]) of
{ok, RawFile} ->
_ = case Offset of
0 ->
ok;
_ ->
{ok, _} = file:position(RawFile, {bof, Offset})
end,
try
sendfile_loop(Transport, Socket, RawFile, Bytes, 0, ChunkSize)
after
ok = file:close(RawFile)
end;
{error, _Reason} = Error ->
Error
end;
sendfile(Transport, Socket, RawFile, Offset, Bytes, Opts) ->
ChunkSize = chunk_size(Opts),
Initial2 = case file:position(RawFile, {cur, 0}) of
{ok, Offset} ->
Offset;
{ok, Initial} ->
{ok, _} = file:position(RawFile, {bof, Offset}),
Initial
end,
case sendfile_loop(Transport, Socket, RawFile, Bytes, 0, ChunkSize) of
{ok, _Sent} = Result ->
{ok, _} = file:position(RawFile, {bof, Initial2}),
Result;
{error, _Reason} = Error ->
Error
end.
-spec chunk_size(sendfile_opts()) -> pos_integer().
chunk_size(Opts) ->
case lists:keyfind(chunk_size, 1, Opts) of
{chunk_size, ChunkSize}
when is_integer(ChunkSize) andalso ChunkSize > 0 ->
ChunkSize;
{chunk_size, 0} ->
16#1FFF;
false ->
16#1FFF
end.
-spec sendfile_loop(module(), socket(), file:fd(), non_neg_integer(),
non_neg_integer(), pos_integer())
-> {ok, non_neg_integer()} | {error, term()}.
sendfile_loop(_Transport, _Socket, _RawFile, Sent, Sent, _ChunkSize)
when Sent =/= 0 ->
%% All requested data has been read and sent, return number of bytes sent.
{ok, Sent};
sendfile_loop(Transport, Socket, RawFile, Bytes, Sent, ChunkSize) ->
ReadSize = read_size(Bytes, Sent, ChunkSize),
case file:read(RawFile, ReadSize) of
{ok, IoData} ->
case Transport:send(Socket, IoData) of
ok ->
Sent2 = iolist_size(IoData) + Sent,
sendfile_loop(Transport, Socket, RawFile, Bytes, Sent2,
ChunkSize);
{error, _Reason} = Error ->
Error
end;
eof ->
{ok, Sent};
{error, _Reason} = Error ->
Error
end.
-spec read_size(non_neg_integer(), non_neg_integer(), non_neg_integer()) ->
non_neg_integer().
read_size(0, _Sent, ChunkSize) ->
ChunkSize;
read_size(Bytes, Sent, ChunkSize) ->
min(Bytes - Sent, ChunkSize).
|
