mirror of
https://github.com/lunarmodules/luasocket.git
synced 2024-11-12 16:28:22 +01:00
246 lines
7.6 KiB
Lua
246 lines
7.6 KiB
Lua
-----------------------------------------------------------------------------
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-- FTP support for the Lua language
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-- LuaSocket toolkit.
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-- Author: Diego Nehab
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-- RCS ID: $Id$
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-----------------------------------------------------------------------------
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-----------------------------------------------------------------------------
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-- Load required modules
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-----------------------------------------------------------------------------
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local socket = require("socket")
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local ltn12 = require("ltn12")
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local url = require("url")
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local tp = require("tp")
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-----------------------------------------------------------------------------
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-- Setup namespace
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-----------------------------------------------------------------------------
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_LOADED["ftp"] = getfenv(1)
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-----------------------------------------------------------------------------
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-- Program constants
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-----------------------------------------------------------------------------
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-- timeout in seconds before the program gives up on a connection
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TIMEOUT = 60
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-- default port for ftp service
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PORT = 21
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-- this is the default anonymous password. used when no password is
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-- provided in url. should be changed to your e-mail.
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USER = "ftp"
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PASSWORD = "anonymous@anonymous.org"
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-----------------------------------------------------------------------------
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-- Low level FTP API
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-----------------------------------------------------------------------------
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local metat = { __index = {} }
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function open(server, port)
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local tp = socket.try(tp.connect(server, port or PORT, TIMEOUT))
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return setmetatable({tp = tp}, metat)
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end
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local function port(portt)
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return portt.server:accept()
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end
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local function pasv(pasvt)
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local data = socket.try(socket.tcp())
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socket.try(data:settimeout(TIMEOUT))
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socket.try(data:connect(pasvt.ip, pasvt.port))
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return data
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end
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function metat.__index:login(user, password)
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socket.try(self.tp:command("user", user or USER))
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local code, reply = socket.try(self.tp:check{"2..", 331})
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if code == 331 then
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socket.try(self.tp:command("pass", password or PASSWORD))
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socket.try(self.tp:check("2.."))
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end
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return 1
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end
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function metat.__index:pasv()
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socket.try(self.tp:command("pasv"))
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local code, reply = socket.try(self.tp:check("2.."))
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local pattern = "(%d+)%D(%d+)%D(%d+)%D(%d+)%D(%d+)%D(%d+)"
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local a, b, c, d, p1, p2 = socket.skip(2, string.find(reply, pattern))
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socket.try(a and b and c and d and p1 and p2, reply)
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self.pasvt = {
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ip = string.format("%d.%d.%d.%d", a, b, c, d),
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port = p1*256 + p2
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}
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if self.portt then
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self.portt.server:close()
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self.portt = nil
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end
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return self.pasvt.ip, self.pasvt.port
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end
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function metat.__index:port(ip, port)
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self.pasvt = nil
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local server
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if not ip then
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ip, port = socket.try(self.tp:getcontrol():getsockname())
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server = socket.try(socket.bind(ip, 0))
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ip, port = socket.try(server:getsockname())
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socket.try(server:settimeout(TIMEOUT))
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end
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local pl = math.mod(port, 256)
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local ph = (port - pl)/256
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local arg = string.gsub(string.format("%s,%d,%d", ip, ph, pl), "%.", ",")
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socket.try(self.tp:command("port", arg))
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socket.try(self.tp:check("2.."))
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self.portt = server and {ip = ip, port = port, server = server}
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return 1
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end
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function metat.__index:send(sendt)
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local data
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socket.try(self.pasvt or self.portt, "need port or pasv first")
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if self.pasvt then data = socket.try(pasv(self.pasvt)) end
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local argument = sendt.argument or string.gsub(sendt.path, "^/", "")
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if argument == "" then argument = nil end
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local command = sendt.command or "stor"
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socket.try(self.tp:command(command, argument))
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local code, reply = socket.try(self.tp:check{"2..", "1.."})
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if self.portt then data = socket.try(port(self.portt)) end
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local step = sendt.step or ltn12.pump.step
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local checkstep = function(src, snk)
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local readyt = socket.select(readt, nil, 0)
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if readyt[tp] then
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code, reply = self.tp:check("2..")
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if not code then
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data:close()
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return nil, reply
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end
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end
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local ret, err = step(src, snk)
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if err then data:close() end
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return ret, err
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end
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local sink = socket.sink("close-when-done", data)
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socket.try(ltn12.pump.all(sendt.source, sink, checkstep))
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if string.find(code, "1..") then socket.try(self.tp:check("2..")) end
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return 1
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end
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function metat.__index:receive(recvt)
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local data
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socket.try(self.pasvt or self.portt, "need port or pasv first")
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if self.pasvt then data = socket.try(pasv(self.pasvt)) end
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local argument = recvt.argument or string.gsub(recvt.path, "^/", "")
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if argument == "" then argument = nil end
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local command = recvt.command or "retr"
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socket.try(self.tp:command(command, argument))
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local code = socket.try(self.tp:check{"1..", "2.."})
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if self.portt then data = socket.try(port(self.portt)) end
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local source = socket.source("until-closed", data)
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local step = recvt.step or ltn12.pump.step
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local checkstep = function(src, snk)
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local ret, err = step(src, snk)
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if err then data:close() end
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return ret, err
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end
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socket.try(ltn12.pump.all(source, recvt.sink, checkstep))
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if string.find(code, "1..") then socket.try(self.tp:check("2..")) end
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return 1
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end
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function metat.__index:cwd(dir)
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socket.try(self.tp:command("cwd", dir))
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socket.try(self.tp:check(250))
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return 1
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end
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function metat.__index:type(type)
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socket.try(self.tp:command("type", type))
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socket.try(self.tp:check(200))
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return 1
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end
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function metat.__index:greet()
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local code = socket.try(self.tp:check{"1..", "2.."})
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if string.find(code, "1..") then socket.try(self.tp:check("2..")) end
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return 1
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end
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function metat.__index:quit()
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socket.try(self.tp:command("quit"))
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socket.try(self.tp:check("2.."))
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return 1
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end
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function metat.__index:close()
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socket.try(self.tp:close())
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return 1
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end
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-----------------------------------------------------------------------------
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-- High level FTP API
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-----------------------------------------------------------------------------
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local function tput(putt)
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local con = ftp.open(putt.host, putt.port)
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con:greet()
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con:login(putt.user, putt.password)
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if putt.type then con:type(putt.type) end
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con:pasv()
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con:send(putt)
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con:quit()
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return con:close()
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end
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local default = {
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path = "/",
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scheme = "ftp"
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}
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local function parse(u)
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local t = socket.try(url.parse(u, default))
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socket.try(t.scheme == "ftp", "invalid scheme '" .. t.scheme .. "'")
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socket.try(t.host, "invalid host")
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local pat = "^type=(.)$"
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if t.params then
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t.type = socket.skip(2, string.find(t.params, pat))
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socket.try(t.type == "a" or t.type == "i",
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"invalid type '" .. t.type .. "'")
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end
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return t
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end
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local function sput(u, body)
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local putt = parse(u)
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putt.source = ltn12.source.string(body)
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return tput(putt)
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end
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put = socket.protect(function(putt, body)
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if type(putt) == "string" then return sput(putt, body)
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else return tput(putt) end
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end)
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local function tget(gett)
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local con = ftp.open(gett.host, gett.port)
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con:greet()
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con:login(gett.user, gett.password)
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if gett.type then con:type(gett.type) end
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con:pasv()
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con:receive(gett)
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con:quit()
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return con:close()
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end
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local function sget(u)
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local gett = parse(u)
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local t = {}
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gett.sink = ltn12.sink.table(t)
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tget(gett)
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return table.concat(t)
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end
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get = socket.protect(function(gett)
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if type(gett) == "string" then return sget(gett)
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else return tget(gett) end
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end)
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