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local socket = require "bee.socket"
local select = require "bee.select"
local fs = require "bee.filesystem"
local selector = select.create()
local SELECT_READ <const> = select.SELECT_READ
local SELECT_WRITE <const> = select.SELECT_WRITE
local function fd_set_read(s)
if s._flags & SELECT_READ ~= 0 then
return
end
s._flags = s._flags | SELECT_READ
selector:event_mod(s._fd, s._flags)
end
local function fd_clr_read(s)
if s._flags & SELECT_READ == 0 then
return
end
s._flags = s._flags & (~SELECT_READ)
selector:event_mod(s._fd, s._flags)
end
local function fd_set_write(s)
if s._flags & SELECT_WRITE ~= 0 then
return
end
s._flags = s._flags | SELECT_WRITE
selector:event_mod(s._fd, s._flags)
end
local function fd_clr_write(s)
if s._flags & SELECT_WRITE == 0 then
return
end
s._flags = s._flags & (~SELECT_WRITE)
selector:event_mod(s._fd, s._flags)
end
local function on_event(self, name, ...)
local f = self._event[name]
if f then
return f(self, ...)
end
end
local function close(self)
local fd = self._fd
on_event(self, "close")
selector:event_del(fd)
fd:close()
end
local stream_mt = {}
local stream = {}
stream_mt.__index = stream
function stream_mt:__newindex(name, func)
if name:sub(1, 3) == "on_" then
self._event[name:sub(4)] = func
end
end
function stream:write(data)
if self.shutdown_w then
return
end
if data == "" then
return
end
if self._writebuf == "" then
fd_set_write(self)
end
self._writebuf = self._writebuf .. data
end
function stream:is_closed()
return self.shutdown_w and self.shutdown_r
end
function stream:close()
if not self.shutdown_r then
self.shutdown_r = true
fd_clr_read(self)
end
if self.shutdown_w or self._writebuf == "" then
self.shutdown_w = true
fd_clr_write(self)
close(self)
end
end
local function close_write(self)
fd_clr_write(self)
if self.shutdown_r then
close(self)
end
end
local function update_stream(s, event)
if event & SELECT_READ ~= 0 then
local data = s._fd:recv()
if data == nil then
s:close()
elseif data == false then
else
on_event(s, "data", data)
end
end
if event & SELECT_WRITE ~= 0 then
local n = s._fd:send(s._writebuf)
if n == nil then
s.shutdown_w = true
close_write(s)
elseif n == false then
else
s._writebuf = s._writebuf:sub(n + 1)
if s._writebuf == "" then
close_write(s)
end
end
end
end
local listen_mt = {}
local listen = {}
listen_mt.__index = listen
function listen_mt:__newindex(name, func)
if name:sub(1, 3) == "on_" then
self._event[name:sub(4)] = func
end
end
function listen:is_closed()
return self.shutdown_r
end
function listen:close()
self.shutdown_r = true
close(self)
end
local connect_mt = {}
local connect = {}
connect_mt.__index = connect
function connect_mt:__newindex(name, func)
if name:sub(1, 3) == "on_" then
self._event[name:sub(4)] = func
end
end
function connect:write(data)
if data == "" then
return
end
self._writebuf = self._writebuf .. data
end
function connect:is_closed()
return self.shutdown_w
end
function connect:close()
self.shutdown_w = true
close(self)
end
local m = {}
function m.listen(protocol, address, port)
local fd; do
local err
fd, err = socket.create(protocol)
if not fd then
return nil, err
end
if protocol == "unix" then
fs.remove(address)
end
end
do
local ok, err = fd:bind(address, port)
if not ok then
fd:close()
return nil, err
end
end
do
local ok, err = fd:listen()
if not ok then
fd:close()
return nil, err
end
end
local s = {
_fd = fd,
_flags = SELECT_READ,
_event = {},
shutdown_r = false,
shutdown_w = true,
}
selector:event_add(fd, SELECT_READ, function ()
local new_fd, err = fd:accept()
if new_fd == nil then
fd:close()
on_event(s, "error", err)
return
elseif new_fd == false then
else
local new_s = setmetatable({
_fd = new_fd,
_flags = SELECT_READ,
_event = {},
_writebuf = "",
shutdown_r = false,
shutdown_w = false,
}, stream_mt)
if on_event(s, "accepted", new_s) then
selector:event_add(new_fd, new_s._flags, function (event)
update_stream(new_s, event)
end)
else
new_fd:close()
end
end
end)
return setmetatable(s, listen_mt)
end
function m.connect(protocol, address, port)
local fd; do
local err
fd, err = socket.create(protocol)
if not fd then
return nil, err
end
end
do
local ok, err = fd:connect(address, port)
if ok == nil then
fd:close()
return nil, err
end
end
local s = {
_fd = fd,
_flags = SELECT_WRITE,
_event = {},
_writebuf = "",
shutdown_r = false,
shutdown_w = false,
}
selector:event_add(fd, SELECT_WRITE, function ()
local ok, err = fd:status()
if ok then
on_event(s, "connected")
setmetatable(s, stream_mt)
if s._writebuf ~= "" then
update_stream(s, SELECT_WRITE)
if s._writebuf ~= "" then
s._flags = SELECT_READ | SELECT_WRITE
else
s._flags = SELECT_READ
end
else
s._flags = SELECT_READ
end
selector:event_add(s._fd, s._flags, function (event)
update_stream(s, event)
end)
else
s:close()
on_event(s, "error", err)
end
end)
return setmetatable(s, connect_mt)
end
function m.update(timeout)
for func, event in selector:wait(timeout or 0) do
func(event)
end
end
return m
|
