FM / socket

/usr/share/lua/5.3/socket

Name	Size	Mode	Actions
ftp.lua	9243	0644	edit dl rm
headers.lua	3698	0644	edit dl rm
http.lua	12339	0644	edit dl rm
smtp.lua	8074	0644	edit dl rm
tp.lua	3612	0644	edit dl rm
url.lua	11036	0644	edit dl rm

Edit: /usr/share/lua/5.3/socket/ftp.lua (9243B)

-----------------------------------------------------------------------------
-- FTP support for the Lua language
-- LuaSocket toolkit.
-- Author: Diego Nehab
-----------------------------------------------------------------------------

-----------------------------------------------------------------------------
-- Declare module and import dependencies
-----------------------------------------------------------------------------
local base = _G
local table = require("table")
local string = require("string")
local math = require("math")
local socket = require("socket")
local url = require("socket.url")
local tp = require("socket.tp")
local ltn12 = require("ltn12")
socket.ftp = {}
local _M = socket.ftp
-----------------------------------------------------------------------------
-- Program constants
-----------------------------------------------------------------------------
-- timeout in seconds before the program gives up on a connection
_M.TIMEOUT = 60
-- default port for ftp service
_M.PORT = 21
-- this is the default anonymous password. used when no password is
-- provided in url. should be changed to your e-mail.
_M.USER = "ftp"
_M.PASSWORD = "anonymous@anonymous.org"

-----------------------------------------------------------------------------
-- Low level FTP API
-----------------------------------------------------------------------------
local metat = { __index = {} }

function _M.open(server, port, create)
    local tp = socket.try(tp.connect(server, port or _M.PORT, _M.TIMEOUT, create))
    local f = base.setmetatable({ tp = tp }, metat)
    -- make sure everything gets closed in an exception
    f.try = socket.newtry(function() f:close() end)
    return f
end

function metat.__index:portconnect()
    self.try(self.server:settimeout(_M.TIMEOUT))
    self.data = self.try(self.server:accept())
    self.try(self.data:settimeout(_M.TIMEOUT))
end

function metat.__index:pasvconnect()
    self.data = self.try(socket.tcp())
    self.try(self.data:settimeout(_M.TIMEOUT))
    self.try(self.data:connect(self.pasvt.ip, self.pasvt.port))
end

function metat.__index:login(user, password)
    self.try(self.tp:command("user", user or _M.USER))
    local code, reply = self.try(self.tp:check{"2..", 331})
    if code == 331 then
        self.try(self.tp:command("pass", password or _M.PASSWORD))
        self.try(self.tp:check("2.."))
    end
    return 1
end

function metat.__index:pasv()
    self.try(self.tp:command("pasv"))
    local code, reply = self.try(self.tp:check("2.."))
    local pattern = "(%d+)%D(%d+)%D(%d+)%D(%d+)%D(%d+)%D(%d+)"
    local a, b, c, d, p1, p2 = socket.skip(2, string.find(reply, pattern))
    self.try(a and b and c and d and p1 and p2, reply)
    self.pasvt = {
        ip = string.format("%d.%d.%d.%d", a, b, c, d),
        port = p1*256 + p2
    }
    if self.server then
        self.server:close()
        self.server = nil
    end
    return self.pasvt.ip, self.pasvt.port
end

function metat.__index:port(ip, port)
    self.pasvt = nil
    if not ip then
        ip, port = self.try(self.tp:getcontrol():getsockname())
        self.server = self.try(socket.bind(ip, 0))
        ip, port = self.try(self.server:getsockname())
        self.try(self.server:settimeout(_M.TIMEOUT))
    end
    local pl = math.mod(port, 256)
    local ph = (port - pl)/256
    local arg = string.gsub(string.format("%s,%d,%d", ip, ph, pl), "%.", ",")
    self.try(self.tp:command("port", arg))
    self.try(self.tp:check("2.."))
    return 1
end

function metat.__index:send(sendt)
    self.try(self.pasvt or self.server, "need port or pasv first")
    -- if there is a pasvt table, we already sent a PASV command
    -- we just get the data connection into self.data
    if self.pasvt then self:pasvconnect() end
    -- get the transfer argument and command
    local argument = sendt.argument or
        url.unescape(string.gsub(sendt.path or "", "^[/\\]", ""))
    if argument == "" then argument = nil end
    local command = sendt.command or "stor"
    -- send the transfer command and check the reply
    self.try(self.tp:command(command, argument))
    local code, reply = self.try(self.tp:check{"2..", "1.."})
    -- if there is not a a pasvt table, then there is a server
    -- and we already sent a PORT command
    if not self.pasvt then self:portconnect() end
    -- get the sink, source and step for the transfer
    local step = sendt.step or ltn12.pump.step
    local readt = {self.tp.c}
    local checkstep = function(src, snk)
        -- check status in control connection while downloading
        local readyt = socket.select(readt, nil, 0)
        if readyt[tp] then code = self.try(self.tp:check("2..")) end
        return step(src, snk)
    end
    local sink = socket.sink("close-when-done", self.data)
    -- transfer all data and check error
    self.try(ltn12.pump.all(sendt.source, sink, checkstep))
    if string.find(code, "1..") then self.try(self.tp:check("2..")) end
    -- done with data connection
    self.data:close()
    -- find out how many bytes were sent
    local sent = socket.skip(1, self.data:getstats())
    self.data = nil
    return sent
end

function metat.__index:receive(recvt)
    self.try(self.pasvt or self.server, "need port or pasv first")
    if self.pasvt then self:pasvconnect() end
    local argument = recvt.argument or
        url.unescape(string.gsub(recvt.path or "", "^[/\\]", ""))
    if argument == "" then argument = nil end
    local command = recvt.command or "retr"
    self.try(self.tp:command(command, argument))
    local code,reply = self.try(self.tp:check{"1..", "2.."})
    if (code >= 200) and (code <= 299) then
        recvt.sink(reply)
        return 1
    end
    if not self.pasvt then self:portconnect() end
    local source = socket.source("until-closed", self.data)
    local step = recvt.step or ltn12.pump.step
    self.try(ltn12.pump.all(source, recvt.sink, step))
    if string.find(code, "1..") then self.try(self.tp:check("2..")) end
    self.data:close()
    self.data = nil
    return 1
end

function metat.__index:cwd(dir)
    self.try(self.tp:command("cwd", dir))
    self.try(self.tp:check(250))
    return 1
end

function metat.__index:type(type)
    self.try(self.tp:command("type", type))
    self.try(self.tp:check(200))
    return 1
end

function metat.__index:greet()
    local code = self.try(self.tp:check{"1..", "2.."})
    if string.find(code, "1..") then self.try(self.tp:check("2..")) end
    return 1
end

function metat.__index:quit()
    self.try(self.tp:command("quit"))
    self.try(self.tp:check("2.."))
    return 1
end

function metat.__index:close()
    if self.data then self.data:close() end
    if self.server then self.server:close() end
    return self.tp:close()
end

-----------------------------------------------------------------------------
-- High level FTP API
-----------------------------------------------------------------------------
local function override(t)
    if t.url then
        local u = url.parse(t.url)
        for i,v in base.pairs(t) do
            u[i] = v
        end
        return u
    else return t end
end

local function tput(putt)
    putt = override(putt)
    socket.try(putt.host, "missing hostname")
    local f = _M.open(putt.host, putt.port, putt.create)
    f:greet()
    f:login(putt.user, putt.password)
    if putt.type then f:type(putt.type) end
    f:pasv()
    local sent = f:send(putt)
    f:quit()
    f:close()
    return sent
end

local default = {
    path = "/",
    scheme = "ftp"
}

local function parse(u)
    local t = socket.try(url.parse(u, default))
    socket.try(t.scheme == "ftp", "wrong scheme '" .. t.scheme .. "'")
    socket.try(t.host, "missing hostname")
    local pat = "^type=(.)$"
    if t.params then
        t.type = socket.skip(2, string.find(t.params, pat))
        socket.try(t.type == "a" or t.type == "i",
            "invalid type '" .. t.type .. "'")
    end
    return t
end

local function sput(u, body)
    local putt = parse(u)
    putt.source = ltn12.source.string(body)
    return tput(putt)
end

_M.put = socket.protect(function(putt, body)
    if base.type(putt) == "string" then return sput(putt, body)
    else return tput(putt) end
end)

local function tget(gett)
    gett = override(gett)
    socket.try(gett.host, "missing hostname")
    local f = _M.open(gett.host, gett.port, gett.create)
    f:greet()
    f:login(gett.user, gett.password)
    if gett.type then f:type(gett.type) end
    f:pasv()
    f:receive(gett)
    f:quit()
    return f:close()
end

local function sget(u)
    local gett = parse(u)
    local t = {}
    gett.sink = ltn12.sink.table(t)
    tget(gett)
    return table.concat(t)
end

_M.command = socket.protect(function(cmdt)
    cmdt = override(cmdt)
    socket.try(cmdt.host, "missing hostname")
    socket.try(cmdt.command, "missing command")
    local f = open(cmdt.host, cmdt.port, cmdt.create)
    f:greet()
    f:login(cmdt.user, cmdt.password)
    f.try(f.tp:command(cmdt.command, cmdt.argument))
    if cmdt.check then f.try(f.tp:check(cmdt.check)) end
    f:quit()
    return f:close()
end)

_M.get = socket.protect(function(gett)
    if base.type(gett) == "string" then return sget(gett)
    else return tget(gett) end
end)

return _M

cmd: