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local uv = require('luv')
local StdioStream = {}
StdioStream.__index = StdioStream
function StdioStream.open()
local self = setmetatable({
_in = uv.new_pipe(false),
_out = uv.new_pipe(false)
}, StdioStream)
self._in:open(0)
self._out:open(1)
return self
end
function StdioStream:write(data)
self._out:write(data)
end
function StdioStream:read_start(cb)
self._in:read_start(function(err, chunk)
if err then
error(err)
end
cb(chunk)
end)
end
function StdioStream:read_stop()
self._in:read_stop()
end
function StdioStream:close()
self._in:close()
self._out:close()
end
local SocketStream = {}
SocketStream.__index = SocketStream
function SocketStream.open(file)
local socket = uv.new_pipe(false)
local self = setmetatable({
_socket = socket,
_stream_error = nil
}, SocketStream)
uv.pipe_connect(socket, file, function (err)
self._stream_error = self._stream_error or err
end)
return self
end
function SocketStream.connect(host, port)
local socket = uv.new_tcp()
local self = setmetatable({
_socket = socket,
_stream_error = nil
}, SocketStream)
uv.tcp_connect(socket, host, port, function (err)
self._stream_error = self._stream_error or err
end)
return self
end
function SocketStream:write(data)
if self._stream_error then
error(self._stream_error)
end
uv.write(self._socket, data, function(err)
if err then
error(self._stream_error or err)
end
end)
end
function SocketStream:read_start(cb)
if self._stream_error then
error(self._stream_error)
end
uv.read_start(self._socket, function(err, chunk)
if err then
error(err)
end
cb(chunk)
end)
end
function SocketStream:read_stop()
if self._stream_error then
error(self._stream_error)
end
uv.read_stop(self._socket)
end
function SocketStream:close()
uv.close(self._socket)
end
local ChildProcessStream = {}
ChildProcessStream.__index = ChildProcessStream
function ChildProcessStream.spawn(argv, env, io_extra)
local self = setmetatable({
_child_stdin = uv.new_pipe(false);
_child_stdout = uv.new_pipe(false);
_exiting = false;
}, ChildProcessStream)
local prog = argv[1]
local args = {}
for i = 2, #argv do
args[#args + 1] = argv[i]
end
self._proc, self._pid = uv.spawn(prog, {
stdio = {self._child_stdin, self._child_stdout, 2, io_extra},
args = args,
env = env,
}, function(status, signal)
self.status = status
self.signal = signal
end)
if not self._proc then
local err = self._pid
error(err)
end
return self
end
function ChildProcessStream:write(data)
self._child_stdin:write(data)
end
function ChildProcessStream:read_start(cb)
self._child_stdout:read_start(function(err, chunk)
if err then
error(err)
end
cb(chunk)
end)
end
function ChildProcessStream:read_stop()
self._child_stdout:read_stop()
end
function ChildProcessStream:close(signal)
if self._closed then
return
end
self._closed = true
self:read_stop()
self._child_stdin:close()
self._child_stdout:close()
if type(signal) == 'string' then
self._proc:kill('sig'..signal)
end
while self.status == nil do
uv.run 'once'
end
return self.status, self.signal
end
return {
StdioStream = StdioStream;
ChildProcessStream = ChildProcessStream;
SocketStream = SocketStream;
}
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