prosody
8eccd07b619c
net/websocket/frames.lua

Find changesets by keywords by author, files, the commit message, revision number or hash, or revset expression.

Software / code / prosody

Annotate

net/websocket/frames.lua @ 6389:8eccd07b619c

net/websocket: Add new websocket client code
author daurnimator <quae@daurnimator.com>
date Wed, 03 Sep 2014 15:28:46 -0400
child 6398:ad434f47bfc0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
6389
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
1 -- Prosody IM
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
2 -- Copyright (C) 2012 Florian Zeitz
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
3 -- Copyright (C) 2014 Daurnimator
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
4 --
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
5 -- This project is MIT/X11 licensed. Please see the
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
6 -- COPYING file in the source package for more information.
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
7 --
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
8
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
9 local softreq = require "util.dependencies".softreq;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
10 local log = require "util.logger".init "websocket.frames";
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
11 local random_bytes = require "util.random".bytes;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
12
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
13 local bit;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
14 pcall(function() bit = require"bit"; end);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
15 bit = bit or softreq"bit32"
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
16 if not bit then log("error", "No bit module found. Either LuaJIT 2, lua-bitop or Lua 5.2 is required"); end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
17 local band = bit.band;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
18 local bor = bit.bor;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
19 local bxor = bit.bxor;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
20 local lshift = bit.lshift;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
21 local rshift = bit.rshift;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
22
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
23 local t_concat = table.concat;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
24 local s_byte = string.byte;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
25 local s_char= string.char;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
26 local s_sub = string.sub;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
27
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
28 local function read_uint16be(str, pos)
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
29 local l1, l2 = s_byte(str, pos, pos+1);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
30 return l1*256 + l2;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
31 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
32 -- TODO: this may lose precision
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
33 local function read_uint64be(str, pos)
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
34 local l1, l2, l3, l4, l5, l6, l7, l8 = s_byte(str, pos, pos+7);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
35 return lshift(l1, 56) + lshift(l2, 48) + lshift(l3, 40) + lshift(l4, 32)
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
36 + lshift(l5, 24) + lshift(l6, 16) + lshift(l7, 8) + l8;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
37 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
38 local function pack_uint16be(x)
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
39 return s_char(rshift(x, 8), band(x, 0xFF));
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
40 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
41 local function sm(x, n)
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
42 return band(rshift(x, n), 0xFF);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
43 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
44 local function pack_uint64be(x)
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
45 return s_char(rshift(x, 56), sm(x, 48), sm(x, 40), sm(x, 32),
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
46 sm(x, 24), sm(x, 16), sm(x, 8), band(x, 0xFF));
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
47 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
48
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
49 local function parse_frame_header(frame)
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
50 if #frame < 2 then return; end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
51
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
52 local byte1, byte2 = s_byte(frame, 1, 2);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
53 local result = {
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
54 FIN = band(byte1, 0x80) > 0;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
55 RSV1 = band(byte1, 0x40) > 0;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
56 RSV2 = band(byte1, 0x20) > 0;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
57 RSV3 = band(byte1, 0x10) > 0;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
58 opcode = band(byte1, 0x0F);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
59
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
60 MASK = band(byte2, 0x80) > 0;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
61 length = band(byte2, 0x7F);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
62 };
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
63
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
64 local length_bytes = 0;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
65 if result.length == 126 then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
66 length_bytes = 2;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
67 elseif result.length == 127 then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
68 length_bytes = 8;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
69 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
70
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
71 local header_length = 2 + length_bytes + (result.MASK and 4 or 0);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
72 if #frame < header_length then return; end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
73
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
74 if length_bytes == 2 then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
75 result.length = read_uint16be(frame, 3);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
76 elseif length_bytes == 8 then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
77 result.length = read_uint64be(frame, 3);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
78 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
79
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
80 if result.MASK then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
81 result.key = { s_byte(frame, pos+1, pos+4) };
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
82 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
83
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
84 return result, header_length;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
85 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
86
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
87 -- XORs the string `str` with the array of bytes `key`
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
88 -- TODO: optimize
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
89 local function apply_mask(str, key, from, to)
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
90 from = from or 1
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
91 if from < 0 then from = #str + from + 1 end -- negative indicies
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
92 to = to or #str
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
93 if to < 0 then to = #str + to + 1 end -- negative indicies
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
94 local key_len = #key
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
95 local counter = 0;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
96 local data = {};
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
97 for i = from, to do
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
98 local key_index = counter%key_len + 1;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
99 counter = counter + 1;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
100 data[counter] = s_char(bxor(key[key_index], s_byte(str, i)));
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
101 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
102 return t_concat(data);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
103 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
104
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
105 local function parse_frame_body(frame, header, pos)
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
106 if header.MASK then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
107 return apply_mask(frame, header.key, pos, pos + header.length - 1);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
108 else
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
109 return frame:sub(pos, pos + header.length - 1);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
110 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
111 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
112
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
113 local function parse_frame(frame)
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
114 local result, pos = parse_frame_header(frame);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
115 if result == nil or #frame < (pos + result.length) then return; end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
116 result.data = parse_frame_body(frame, result, pos+1);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
117 return result, pos + result.length;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
118 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
119
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
120 local function build_frame(desc)
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
121 local data = desc.data or "";
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
122
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
123 assert(desc.opcode and desc.opcode >= 0 and desc.opcode <= 0xF, "Invalid WebSocket opcode");
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
124 if desc.opcode >= 0x8 then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
125 -- RFC 6455 5.5
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
126 assert(#data <= 125, "WebSocket control frames MUST have a payload length of 125 bytes or less.");
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
127 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
128
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
129 local b1 = bor(desc.opcode,
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
130 desc.FIN and 0x80 or 0,
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
131 desc.RSV1 and 0x40 or 0,
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
132 desc.RSV2 and 0x20 or 0,
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
133 desc.RSV3 and 0x10 or 0);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
134 local b2;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
135
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
136 local length_extra
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
137 if #data <= 125 then -- 7-bit length
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
138 b2 = #data;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
139 length_extra = "";
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
140 elseif #data <= 0xFFFF then -- 2-byte length
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
141 b2 = 126;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
142 length_extra = pack_uint16be(#data);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
143 else -- 8-byte length
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
144 b2 = 127;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
145 length_extra = pack_uint64be(#data);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
146 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
147
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
148 local key = ""
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
149 if desc.MASK then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
150 local key_a = desc.key
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
151 if key_a then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
152 key = s_char(unpack(key_a, 1, 4));
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
153 else
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
154 key = random_bytes(4);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
155 key_a = {key:byte(1,4)};
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
156 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
157 b2 = bor(b2, 0x80);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
158 data = apply_mask(data, key_a);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
159 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
160
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
161 return s_char(b1, b2) .. length_extra .. key .. data
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
162 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
163
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
164 local function parse_close(data)
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
165 local code, message
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
166 if #data >= 2 then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
167 code = read_uint16be(data, 1);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
168 if #data > 2 then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
169 message = s_sub(data, 3);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
170 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
171 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
172 return code, message
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
173 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
174
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
175 local function build_close(code, message)
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
176 local data = pack_uint16be(code);
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
177 if message then
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
178 assert(#message<=123, "Close reason must be <=123 bytes");
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
179 data = data .. message;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
180 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
181 return build_frame({
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
182 opcode = 0x8;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
183 FIN = true;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
184 MASK = true;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
185 data = data;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
186 });
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
187 end
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
188
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
189 return {
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
190 parse_header = parse_frame_header;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
191 parse_body = parse_frame_body;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
192 parse = parse_frame;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
193 build = build_frame;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
194 parse_close = parse_close;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
195 build_close = build_close;
8eccd07b619c net/websocket: Add new websocket client code
daurnimator <quae@daurnimator.com>
parents:
diff changeset
196 };