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| local base = _G |
| local string = require("string") |
| local math = require("math") |
| local socket = require("socket.core") |
|
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| local _M = socket |
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| |
| function _M.connect4(address, port, laddress, lport) |
| return socket.connect(address, port, laddress, lport, "inet") |
| end |
|
|
| function _M.connect6(address, port, laddress, lport) |
| return socket.connect(address, port, laddress, lport, "inet6") |
| end |
|
|
| function _M.bind(host, port, backlog) |
| if host == "*" then host = "0.0.0.0" end |
| local addrinfo, err = socket.dns.getaddrinfo(host); |
| if not addrinfo then return nil, err end |
| local sock, res |
| err = "no info on address" |
| for i, alt in base.ipairs(addrinfo) do |
| if alt.family == "inet" then |
| sock, err = socket.tcp() |
| else |
| sock, err = socket.tcp6() |
| end |
| if not sock then return nil, err end |
| sock:setoption("reuseaddr", true) |
| res, err = sock:bind(alt.addr, port) |
| if not res then |
| sock:close() |
| else |
| res, err = sock:listen(backlog) |
| if not res then |
| sock:close() |
| else |
| return sock |
| end |
| end |
| end |
| return nil, err |
| end |
|
|
| _M.try = _M.newtry() |
|
|
| function _M.choose(table) |
| return function(name, opt1, opt2) |
| if base.type(name) ~= "string" then |
| name, opt1, opt2 = "default", name, opt1 |
| end |
| local f = table[name or "nil"] |
| if not f then base.error("unknown key (".. base.tostring(name) ..")", 3) |
| else return f(opt1, opt2) end |
| end |
| end |
|
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| |
| |
| |
| |
| local sourcet, sinkt = {}, {} |
| _M.sourcet = sourcet |
| _M.sinkt = sinkt |
|
|
| _M.BLOCKSIZE = 2048 |
|
|
| sinkt["close-when-done"] = function(sock) |
| return base.setmetatable({ |
| getfd = function() return sock:getfd() end, |
| dirty = function() return sock:dirty() end |
| }, { |
| __call = function(self, chunk, err) |
| if not chunk then |
| sock:close() |
| return 1 |
| else return sock:send(chunk) end |
| end |
| }) |
| end |
|
|
| sinkt["keep-open"] = function(sock) |
| return base.setmetatable({ |
| getfd = function() return sock:getfd() end, |
| dirty = function() return sock:dirty() end |
| }, { |
| __call = function(self, chunk, err) |
| if chunk then return sock:send(chunk) |
| else return 1 end |
| end |
| }) |
| end |
|
|
| sinkt["default"] = sinkt["keep-open"] |
|
|
| _M.sink = _M.choose(sinkt) |
|
|
| sourcet["by-length"] = function(sock, length) |
| return base.setmetatable({ |
| getfd = function() return sock:getfd() end, |
| dirty = function() return sock:dirty() end |
| }, { |
| __call = function() |
| if length <= 0 then return nil end |
| local size = math.min(socket.BLOCKSIZE, length) |
| local chunk, err = sock:receive(size) |
| if err then return nil, err end |
| length = length - string.len(chunk) |
| return chunk |
| end |
| }) |
| end |
|
|
| sourcet["until-closed"] = function(sock) |
| local done |
| return base.setmetatable({ |
| getfd = function() return sock:getfd() end, |
| dirty = function() return sock:dirty() end |
| }, { |
| __call = function() |
| if done then return nil end |
| local chunk, err, partial = sock:receive(socket.BLOCKSIZE) |
| if not err then return chunk |
| elseif err == "closed" then |
| sock:close() |
| done = 1 |
| return partial |
| else return nil, err end |
| end |
| }) |
| end |
|
|
|
|
| sourcet["default"] = sourcet["until-closed"] |
|
|
| _M.source = _M.choose(sourcet) |
|
|
| return _M |
|
|
