mirror of https://github.com/LDDestroier/CC/
705 lines
18 KiB
Lua
705 lines
18 KiB
Lua
-- Skynet was created by Gollark
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-- This version was modified to include CBOR in the same file
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local CBOR = (function()
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-- Concise Binary Object Representation (CBOR)
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-- RFC 7049
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local function softreq(pkg, field)
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local ok, mod = pcall(require, pkg);
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if not ok then return end
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if field then return mod[field]; end
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return mod;
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end
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local dostring = function (s)
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local ok, f = pcall(loadstring or load, s); -- luacheck: read globals loadstring
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if ok and f then return f(); end
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end
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local setmetatable, getmetatable = setmetatable, getmetatable;
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local dbg_getmetatable
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-- if debug then dbg_getmetatable = debug.getmetatable else dbg_getmetatable = getmetatable end
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local assert = assert;
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local error = error;
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local type = type;
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local pairs = pairs;
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local ipairs = ipairs;
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local tostring = tostring;
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local s_char = string.char;
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local t_concat = table.concat;
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local t_sort = table.sort;
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local m_floor = math.floor;
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local m_abs = math.abs;
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local m_huge = math.huge;
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local m_max = math.max;
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local maxint = math.maxinteger or 9007199254740992;
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local minint = math.mininteger or -9007199254740992;
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local NaN = 0/0;
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local m_frexp = math.frexp;
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local m_ldexp = math.ldexp or function (x, exp) return x * 2.0 ^ exp; end;
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local m_type = math.type or function (n) return n % 1 == 0 and n <= maxint and n >= minint and "integer" or "float" end;
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local s_pack = string.pack or softreq("struct", "pack");
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local s_unpack = string.unpack or softreq("struct", "unpack");
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local b_rshift = softreq("bit32", "rshift") or softreq("bit", "rshift") or
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dostring "return function(a,b) return a >> b end" or
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function (a, b) return m_max(0, m_floor(a / (2 ^ b))); end;
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-- sanity check
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if s_pack and s_pack(">I2", 0) ~= "\0\0" then
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s_pack = nil;
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end
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if s_unpack and s_unpack(">I2", "\1\2\3\4") ~= 0x102 then
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s_unpack = nil;
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end
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local _ENV = nil; -- luacheck: ignore 211
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local encoder = {};
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local function encode(obj, opts)
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return encoder[type(obj)](obj, opts);
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end
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-- Major types 0, 1 and length encoding for others
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local function integer(num, m)
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if m == 0 and num < 0 then
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-- negative integer, major type 1
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num, m = - num - 1, 32;
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end
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if num < 24 then
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return s_char(m + num);
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elseif num < 2 ^ 8 then
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return s_char(m + 24, num);
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elseif num < 2 ^ 16 then
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return s_char(m + 25, b_rshift(num, 8), num % 0x100);
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elseif num < 2 ^ 32 then
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return s_char(m + 26,
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b_rshift(num, 24) % 0x100,
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b_rshift(num, 16) % 0x100,
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b_rshift(num, 8) % 0x100,
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num % 0x100);
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elseif num < 2 ^ 64 then
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local high = m_floor(num / 2 ^ 32);
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num = num % 2 ^ 32;
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return s_char(m + 27,
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b_rshift(high, 24) % 0x100,
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b_rshift(high, 16) % 0x100,
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b_rshift(high, 8) % 0x100,
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high % 0x100,
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b_rshift(num, 24) % 0x100,
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b_rshift(num, 16) % 0x100,
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b_rshift(num, 8) % 0x100,
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num % 0x100);
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end
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error "int too large";
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end
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if s_pack then
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function integer(num, m)
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local fmt;
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m = m or 0;
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if num < 24 then
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fmt, m = ">B", m + num;
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elseif num < 256 then
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fmt, m = ">BB", m + 24;
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elseif num < 65536 then
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fmt, m = ">BI2", m + 25;
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elseif num < 4294967296 then
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fmt, m = ">BI4", m + 26;
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else
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fmt, m = ">BI8", m + 27;
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end
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return s_pack(fmt, m, num);
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end
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end
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local simple_mt = {};
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function simple_mt:__tostring() return self.name or ("simple(%d)"):format(self.value); end
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function simple_mt:__tocbor() return self.cbor or integer(self.value, 224); end
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local function simple(value, name, cbor)
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assert(value >= 0 and value <= 255, "bad argument #1 to 'simple' (integer in range 0..255 expected)");
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return setmetatable({ value = value, name = name, cbor = cbor }, simple_mt);
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end
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local tagged_mt = {};
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function tagged_mt:__tostring() return ("%d(%s)"):format(self.tag, tostring(self.value)); end
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function tagged_mt:__tocbor() return integer(self.tag, 192) .. encode(self.value); end
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local function tagged(tag, value)
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assert(tag >= 0, "bad argument #1 to 'tagged' (positive integer expected)");
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return setmetatable({ tag = tag, value = value }, tagged_mt);
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end
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local null = simple(22, "null"); -- explicit null
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local undefined = simple(23, "undefined"); -- undefined or nil
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local BREAK = simple(31, "break", "\255");
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-- Number types dispatch
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function encoder.number(num)
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return encoder[m_type(num)](num);
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end
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-- Major types 0, 1
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function encoder.integer(num)
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if num < 0 then
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return integer(-1 - num, 32);
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end
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return integer(num, 0);
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end
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-- Major type 7
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function encoder.float(num)
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if num ~= num then -- NaN shortcut
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return "\251\127\255\255\255\255\255\255\255";
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end
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local sign = (num > 0 or 1 / num > 0) and 0 or 1;
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num = m_abs(num)
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if num == m_huge then
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return s_char(251, sign * 128 + 128 - 1) .. "\240\0\0\0\0\0\0";
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end
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local fraction, exponent = m_frexp(num)
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if fraction == 0 then
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return s_char(251, sign * 128) .. "\0\0\0\0\0\0\0";
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end
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fraction = fraction * 2;
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exponent = exponent + 1024 - 2;
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if exponent <= 0 then
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fraction = fraction * 2 ^ (exponent - 1)
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exponent = 0;
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else
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fraction = fraction - 1;
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end
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return s_char(251,
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sign * 2 ^ 7 + m_floor(exponent / 2 ^ 4) % 2 ^ 7,
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exponent % 2 ^ 4 * 2 ^ 4 +
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m_floor(fraction * 2 ^ 4 % 0x100),
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m_floor(fraction * 2 ^ 12 % 0x100),
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m_floor(fraction * 2 ^ 20 % 0x100),
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m_floor(fraction * 2 ^ 28 % 0x100),
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m_floor(fraction * 2 ^ 36 % 0x100),
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m_floor(fraction * 2 ^ 44 % 0x100),
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m_floor(fraction * 2 ^ 52 % 0x100)
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)
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end
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if s_pack then
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function encoder.float(num)
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return s_pack(">Bd", 251, num);
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end
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end
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-- Major type 2 - byte strings
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function encoder.bytestring(s)
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return integer(#s, 64) .. s;
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end
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-- Major type 3 - UTF-8 strings
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function encoder.utf8string(s)
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return integer(#s, 96) .. s;
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end
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function encoder.string(s)
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if s:match "^[\0-\127]*$" then -- If string is entirely ASCII characters, then treat it as a UTF-8 string
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return encoder.utf8string(s)
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else
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return encoder.bytestring(s)
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end
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end
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function encoder.boolean(bool)
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return bool and "\245" or "\244";
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end
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encoder["nil"] = function() return "\246"; end
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function encoder.userdata(ud, opts)
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local mt = dbg_getmetatable(ud);
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if mt then
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local encode_ud = opts and opts[mt] or mt.__tocbor;
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if encode_ud then
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return encode_ud(ud, opts);
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end
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end
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error "can't encode userdata";
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end
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function encoder.table(t, opts)
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local mt = getmetatable(t);
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if mt then
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local encode_t = opts and opts[mt] or mt.__tocbor;
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if encode_t then
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return encode_t(t, opts);
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end
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end
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-- the table is encoded as an array iff when we iterate over it,
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-- we see succesive integer keys starting from 1. The lua
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-- language doesn't actually guarantee that this will be the case
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-- when we iterate over a table with successive integer keys, but
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-- due an implementation detail in PUC Rio Lua, this is what we
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-- usually observe. See the Lua manual regarding the # (length)
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-- operator. In the case that this does not happen, we will fall
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-- back to a map with integer keys, which becomes a bit larger.
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local array, map, i, p = { integer(#t, 128) }, { "\191" }, 1, 2;
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local is_array = true;
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for k, v in pairs(t) do
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is_array = is_array and i == k;
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i = i + 1;
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local encoded_v = encode(v, opts);
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array[i] = encoded_v;
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map[p], p = encode(k, opts), p + 1;
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map[p], p = encoded_v, p + 1;
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end
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-- map[p] = "\255";
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map[1] = integer(i - 1, 160);
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return t_concat(is_array and array or map);
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end
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-- Array or dict-only encoders, which can be set as __tocbor metamethod
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function encoder.array(t, opts)
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local array = { };
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for i, v in ipairs(t) do
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array[i] = encode(v, opts);
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end
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return integer(#array, 128) .. t_concat(array);
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end
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function encoder.map(t, opts)
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local map, p, len = { "\191" }, 2, 0;
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for k, v in pairs(t) do
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map[p], p = encode(k, opts), p + 1;
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map[p], p = encode(v, opts), p + 1;
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len = len + 1;
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end
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-- map[p] = "\255";
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map[1] = integer(len, 160);
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return t_concat(map);
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end
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encoder.dict = encoder.map; -- COMPAT
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function encoder.ordered_map(t, opts)
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local map = {};
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if not t[1] then -- no predefined order
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local i = 0;
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for k in pairs(t) do
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i = i + 1;
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map[i] = k;
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end
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t_sort(map);
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end
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for i, k in ipairs(t[1] and t or map) do
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map[i] = encode(k, opts) .. encode(t[k], opts);
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end
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return integer(#map, 160) .. t_concat(map);
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end
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encoder["function"] = function ()
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error "can't encode function";
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end
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-- Decoder
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-- Reads from a file-handle like object
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local function read_bytes(fh, len)
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return fh:read(len);
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end
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local function read_byte(fh)
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return fh:read(1):byte();
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end
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local function read_length(fh, mintyp)
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if mintyp < 24 then
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return mintyp;
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elseif mintyp < 28 then
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local out = 0;
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for _ = 1, 2 ^ (mintyp - 24) do
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out = out * 256 + read_byte(fh);
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end
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return out;
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else
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error "invalid length";
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end
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end
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local decoder = {};
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local function read_type(fh)
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local byte = read_byte(fh);
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return b_rshift(byte, 5), byte % 32;
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end
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local function read_object(fh, opts)
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local typ, mintyp = read_type(fh);
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return decoder[typ](fh, mintyp, opts);
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end
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local function read_integer(fh, mintyp)
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return read_length(fh, mintyp);
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end
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local function read_negative_integer(fh, mintyp)
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return -1 - read_length(fh, mintyp);
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end
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local function read_string(fh, mintyp)
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if mintyp ~= 31 then
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return read_bytes(fh, read_length(fh, mintyp));
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end
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local out = {};
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local i = 1;
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local v = read_object(fh);
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while v ~= BREAK do
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out[i], i = v, i + 1;
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v = read_object(fh);
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end
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return t_concat(out);
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end
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local function read_unicode_string(fh, mintyp)
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return read_string(fh, mintyp);
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end
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local function read_array(fh, mintyp, opts)
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local out = {};
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if mintyp == 31 then
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local i = 1;
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local v = read_object(fh, opts);
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while v ~= BREAK do
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out[i], i = v, i + 1;
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v = read_object(fh, opts);
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end
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else
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local len = read_length(fh, mintyp);
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for i = 1, len do
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out[i] = read_object(fh, opts);
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end
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end
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return out;
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end
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local function read_map(fh, mintyp, opts)
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local out = {};
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local k;
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if mintyp == 31 then
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local i = 1;
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k = read_object(fh, opts);
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while k ~= BREAK do
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out[k], i = read_object(fh, opts), i + 1;
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k = read_object(fh, opts);
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end
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else
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local len = read_length(fh, mintyp);
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for _ = 1, len do
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k = read_object(fh, opts);
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out[k] = read_object(fh, opts);
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end
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end
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return out;
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end
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local tagged_decoders = {};
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local function read_semantic(fh, mintyp, opts)
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local tag = read_length(fh, mintyp);
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local value = read_object(fh, opts);
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local postproc = opts and opts[tag] or tagged_decoders[tag];
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if postproc then
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return postproc(value);
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end
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return tagged(tag, value);
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end
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local function read_half_float(fh)
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local exponent = read_byte(fh);
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local fraction = read_byte(fh);
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local sign = exponent < 128 and 1 or -1; -- sign is highest bit
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fraction = fraction + (exponent * 256) % 1024; -- copy two(?) bits from exponent to fraction
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exponent = b_rshift(exponent, 2) % 32; -- remove sign bit and two low bits from fraction;
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if exponent == 0 then
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return sign * m_ldexp(fraction, -24);
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elseif exponent ~= 31 then
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return sign * m_ldexp(fraction + 1024, exponent - 25);
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elseif fraction == 0 then
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return sign * m_huge;
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else
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return NaN;
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end
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end
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local function read_float(fh)
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local exponent = read_byte(fh);
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local fraction = read_byte(fh);
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local sign = exponent < 128 and 1 or -1; -- sign is highest bit
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exponent = exponent * 2 % 256 + b_rshift(fraction, 7);
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fraction = fraction % 128;
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fraction = fraction * 256 + read_byte(fh);
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fraction = fraction * 256 + read_byte(fh);
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if exponent == 0 then
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return sign * m_ldexp(exponent, -149);
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elseif exponent ~= 0xff then
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return sign * m_ldexp(fraction + 2 ^ 23, exponent - 150);
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elseif fraction == 0 then
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return sign * m_huge;
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else
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return NaN;
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end
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end
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local function read_double(fh)
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local exponent = read_byte(fh);
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local fraction = read_byte(fh);
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local sign = exponent < 128 and 1 or -1; -- sign is highest bit
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exponent = exponent % 128 * 16 + b_rshift(fraction, 4);
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fraction = fraction % 16;
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fraction = fraction * 256 + read_byte(fh);
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fraction = fraction * 256 + read_byte(fh);
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fraction = fraction * 256 + read_byte(fh);
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fraction = fraction * 256 + read_byte(fh);
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fraction = fraction * 256 + read_byte(fh);
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fraction = fraction * 256 + read_byte(fh);
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if exponent == 0 then
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return sign * m_ldexp(exponent, -149);
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elseif exponent ~= 0xff then
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return sign * m_ldexp(fraction + 2 ^ 52, exponent - 1075);
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elseif fraction == 0 then
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return sign * m_huge;
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else
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return NaN;
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end
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end
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if s_unpack then
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function read_float(fh) return s_unpack(">f", read_bytes(fh, 4)) end
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function read_double(fh) return s_unpack(">d", read_bytes(fh, 8)) end
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end
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local function read_simple(fh, value, opts)
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if value == 24 then
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value = read_byte(fh);
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end
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if value == 20 then
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return false;
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elseif value == 21 then
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return true;
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elseif value == 22 then
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return null;
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elseif value == 23 then
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return undefined;
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elseif value == 25 then
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return read_half_float(fh);
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elseif value == 26 then
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return read_float(fh);
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elseif value == 27 then
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return read_double(fh);
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elseif value == 31 then
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return BREAK;
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end
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if opts and opts.simple then
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return opts.simple(value);
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end
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return simple(value);
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end
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decoder[0] = read_integer;
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decoder[1] = read_negative_integer;
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decoder[2] = read_string;
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decoder[3] = read_unicode_string;
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decoder[4] = read_array;
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decoder[5] = read_map;
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decoder[6] = read_semantic;
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decoder[7] = read_simple;
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-- opts.more(n) -> want more data
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-- opts.simple -> decode simple value
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-- opts[int] -> tagged decoder
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|
local function decode(s, opts)
|
|
local fh = {};
|
|
local pos = 1;
|
|
|
|
local more;
|
|
if type(opts) == "function" then
|
|
more = opts;
|
|
elseif type(opts) == "table" then
|
|
more = opts.more;
|
|
elseif opts ~= nil then
|
|
error(("bad argument #2 to 'decode' (function or table expected, got %s)"):format(type(opts)));
|
|
end
|
|
if type(more) ~= "function" then
|
|
function more()
|
|
error "input too short";
|
|
end
|
|
end
|
|
|
|
function fh:read(bytes)
|
|
local ret = s:sub(pos, pos + bytes - 1);
|
|
if #ret < bytes then
|
|
ret = more(bytes - #ret, fh, opts);
|
|
if ret then self:write(ret); end
|
|
return self:read(bytes);
|
|
end
|
|
pos = pos + bytes;
|
|
return ret;
|
|
end
|
|
|
|
function fh:write(bytes) -- luacheck: no self
|
|
s = s .. bytes;
|
|
if pos > 256 then
|
|
s = s:sub(pos + 1);
|
|
pos = 1;
|
|
end
|
|
return #bytes;
|
|
end
|
|
|
|
return read_object(fh, opts);
|
|
end
|
|
|
|
return {
|
|
-- en-/decoder functions
|
|
encode = encode;
|
|
decode = decode;
|
|
decode_file = read_object;
|
|
|
|
-- tables of per-type en-/decoders
|
|
type_encoders = encoder;
|
|
type_decoders = decoder;
|
|
|
|
-- special treatment for tagged values
|
|
tagged_decoders = tagged_decoders;
|
|
|
|
-- constructors for annotated types
|
|
simple = simple;
|
|
tagged = tagged;
|
|
|
|
-- pre-defined simple values
|
|
null = null;
|
|
undefined = undefined;
|
|
};
|
|
end)()
|
|
|
|
local skynet = {
|
|
server = "wss://osmarks.tk/skynet2/connect/",
|
|
socket = nil,
|
|
open_channels = {},
|
|
CBOR = CBOR
|
|
}
|
|
|
|
function skynet.connect(force)
|
|
if not skynet.socket or force then
|
|
-- If we already have a socket and are throwing it away, close old one.
|
|
if skynet.socket then skynet.socket.close() end
|
|
local sock = http.websocket(skynet.server)
|
|
if not sock then error "Skynet server unavailable, broken or running newer protocol version." end
|
|
skynet.socket = sock
|
|
|
|
for _, c in pairs(skynet.open_channels) do
|
|
skynet.open(c)
|
|
end
|
|
end
|
|
end
|
|
|
|
function skynet.disconnect()
|
|
if skynet.socket then skynet.socket.close() end
|
|
end
|
|
|
|
local function value_in_table(t, v)
|
|
for k, tv in pairs(t) do if tv == v then return true, k end end
|
|
return false
|
|
end
|
|
|
|
local function send_raw(data, tries)
|
|
local tries = tries or 0
|
|
skynet.connect()
|
|
local ok, err = pcall(skynet.socket.send, CBOR.encode(data), true) -- send in binary mode
|
|
if not ok then
|
|
if tries > 0 then sleep(tries) end
|
|
if tries > 5 then error("Max reconnection attempts exceeded. " .. err) end
|
|
pcall(skynet.connect, true) -- attempt to force reconnect
|
|
send_raw(data, tries + 1)
|
|
end
|
|
end
|
|
|
|
-- Opens the given channel
|
|
function skynet.open(channel)
|
|
-- Don't send unnecessary channel-open messages
|
|
if not value_in_table(skynet.open_channels, channel) then
|
|
send_raw {
|
|
"open",
|
|
channel
|
|
}
|
|
table.insert(skynet.open_channels, channel)
|
|
end
|
|
end
|
|
|
|
local function recv_one(filter)
|
|
skynet.connect()
|
|
while true do
|
|
local contents = skynet.socket.receive()
|
|
local result = CBOR.decode(contents)
|
|
if type(result) == "table" then
|
|
if result[1] == "error" then error(result[2] .. ": " .. result[3]) end
|
|
if filter(result) then
|
|
return result
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
local function recv_message(channel)
|
|
local m = recv_one(function(msg)
|
|
return msg[1] == "message" and (channel == nil or msg[2].channel == channel)
|
|
end)
|
|
return m[2].channel, m[2].message, m[2]
|
|
end
|
|
|
|
function skynet.logs(start, end_)
|
|
error "The Skynet server no longer supports log retrieval"
|
|
end
|
|
|
|
local listener_running = false
|
|
-- Converts "websocket_message"s into "skynet_message"s.
|
|
function skynet.listen(force_run)
|
|
local function run()
|
|
while true do
|
|
os.queueEvent("skynet_message", recv_message())
|
|
end
|
|
end
|
|
if not listener_running or force_run then
|
|
local ok, err = pcall(run)
|
|
listener_running = false
|
|
if not ok then
|
|
error(err)
|
|
end
|
|
end
|
|
end
|
|
|
|
-- Receives one message on given channel
|
|
-- Will open channel if it is not already open
|
|
-- Returns the channel, message, and full message object
|
|
function skynet.receive(channel)
|
|
if channel then skynet.open(channel) end
|
|
return recv_message(channel)
|
|
end
|
|
|
|
-- Send given data on given channel
|
|
-- Can accept a third argument - an object of extra metadata to send
|
|
function skynet.send(channel, data, full)
|
|
local obj = full or {}
|
|
obj.message = data
|
|
obj.channel = channel
|
|
send_raw {
|
|
"message",
|
|
obj
|
|
}
|
|
end
|
|
|
|
return skynet
|