mirror of
https://github.com/lunarmodules/luasocket.git
synced 2024-07-01 10:59:46 +02:00
Updated for LuaSocket 1.4.
Better tested, some name changes.
This commit is contained in:
Diego Nehab
parent
5c622071f9
commit
9546cd10ab
571
src/ftp.lua
571
src/ftp.lua
|
|
@ -1,60 +1,62 @@
|
|||
-----------------------------------------------------------------------------
|
||||
-- Simple FTP support for the Lua language using the LuaSocket 1.3b toolkit.
|
||||
-- FTP support for the Lua language
|
||||
-- LuaSocket 1.4 toolkit.
|
||||
-- Author: Diego Nehab
|
||||
-- Date: 26/12/2000
|
||||
-- Conforming to: RFC 959
|
||||
-- Conforming to: RFC 959, LTN7
|
||||
-- RCS ID: $Id$
|
||||
-----------------------------------------------------------------------------
|
||||
|
||||
local Public, Private = {}, {}
|
||||
FTP = Public
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Program constants
|
||||
-----------------------------------------------------------------------------
|
||||
-- timeout in seconds before the program gives up on a connection
|
||||
local TIMEOUT = 60
|
||||
Public.TIMEOUT = 60
|
||||
-- default port for ftp service
|
||||
local PORT = 21
|
||||
Public.PORT = 21
|
||||
-- this is the default anonymous password. used when no password is
|
||||
-- provided in url. should be changed for your e-mail.
|
||||
local EMAIL = "anonymous@anonymous.org"
|
||||
-- provided in url. should be changed to your e-mail.
|
||||
Public.EMAIL = "anonymous@anonymous.org"
|
||||
-- block size used in transfers
|
||||
local BLOCKSIZE = 4096
|
||||
Public.BLOCKSIZE = 8192
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Parses a url and returns its scheme, user, password, host, port
|
||||
-- and path components, according to RFC 1738, Uniform Resource Locators (URL),
|
||||
-- of December 1994
|
||||
-- Input
|
||||
-- url: unique resource locator desired
|
||||
-- default: table containing default values to be returned
|
||||
-- Returns
|
||||
-- table with the following fields:
|
||||
-- host: host to connect
|
||||
-- path: url path
|
||||
-- port: host port to connect
|
||||
-- user: user name
|
||||
-- pass: password
|
||||
-- scheme: protocol
|
||||
-- Required libraries
|
||||
-----------------------------------------------------------------------------
|
||||
local split_url = function(url, default)
|
||||
-- initialize default parameters
|
||||
local parsed = default or {}
|
||||
-- get scheme
|
||||
url = gsub(url, "^(.+)://", function (s) %parsed.scheme = s end)
|
||||
-- get user name and password. both can be empty!
|
||||
-- moreover, password can be ommited
|
||||
url = gsub(url, "^([^@:/]*)(:?)([^:@/]-)@", function (u, c, p)
|
||||
%parsed.user = u
|
||||
-- there can be an empty password, but the ':' has to be there
|
||||
-- or else there is no password
|
||||
%parsed.pass = nil -- kill default password
|
||||
if c == ":" then %parsed.pass = p end
|
||||
end)
|
||||
-- get host
|
||||
url = gsub(url, "^([%w%.%-]+)", function (h) %parsed.host = h end)
|
||||
-- get port if any
|
||||
url = gsub(url, "^:(%d+)", function (p) %parsed.port = p end)
|
||||
-- whatever is left is the path
|
||||
if url ~= "" then parsed.path = url end
|
||||
return parsed
|
||||
dofile "concat.lua"
|
||||
dofile "url.lua"
|
||||
dofile "code.lua"
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Tries to send DOS mode lines. Closes socket on error.
|
||||
-- Input
|
||||
-- sock: server socket
|
||||
-- line: string to be sent
|
||||
-- Returns
|
||||
-- err: message in case of error, nil if successfull
|
||||
-----------------------------------------------------------------------------
|
||||
function Private.try_sendline(sock, line)
|
||||
local err = sock:send(line .. "\r\n")
|
||||
if err then sock:close() end
|
||||
return err
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Tries to get a pattern from the server and closes socket on error
|
||||
-- sock: socket connected to the server
|
||||
-- ...: pattern to receive
|
||||
-- Returns
|
||||
-- ...: received pattern
|
||||
-- err: error message if any
|
||||
-----------------------------------------------------------------------------
|
||||
function Private.try_receive(...)
|
||||
local sock = arg[1]
|
||||
local data, err = call(sock.receive, arg)
|
||||
if err then sock:close() end
|
||||
return data, err
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
|
|
@ -65,14 +67,12 @@ end
|
|||
-- ip: string containing ip for data connection
|
||||
-- port: port for data connection
|
||||
-----------------------------------------------------------------------------
|
||||
local get_pasv = function(pasv)
|
||||
local a,b,c,d,p1,p2
|
||||
function Private.get_pasv(pasv)
|
||||
local a, b, c, d, p1, p2, _
|
||||
local ip, port
|
||||
_,_, a, b, c, d, p1, p2 =
|
||||
strfind(pasv, "(%d*),(%d*),(%d*),(%d*),(%d*),(%d*)")
|
||||
if not (a and b and c and d and p1 and p2) then
|
||||
return nil, nil
|
||||
end
|
||||
if not (a and b and c and d and p1 and p2) then return nil, nil end
|
||||
ip = format("%d.%d.%d.%d", a, b, c, d)
|
||||
port = tonumber(p1)*256 + tonumber(p2)
|
||||
return ip, port
|
||||
|
|
@ -87,12 +87,11 @@ end
|
|||
-- Returns
|
||||
-- error message in case of error, nil otherwise
|
||||
-----------------------------------------------------------------------------
|
||||
local send_command = function(control, cmd, arg)
|
||||
local line, err
|
||||
if arg then line = cmd .. " " .. arg .. "\r\n"
|
||||
else line = cmd .. "\r\n" end
|
||||
err = control:send(line)
|
||||
return err
|
||||
function Private.send_command(control, cmd, arg)
|
||||
local line
|
||||
if arg then line = cmd .. " " .. arg
|
||||
else line = cmd end
|
||||
return %Private.try_sendline(control, line)
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
|
|
@ -103,16 +102,16 @@ end
|
|||
-- answer: whole server reply, nil if error
|
||||
-- code: answer status code or error message
|
||||
-----------------------------------------------------------------------------
|
||||
local get_answer = function(control)
|
||||
local code, lastcode, sep
|
||||
local line, err = control:receive()
|
||||
function Private.get_answer(control)
|
||||
local code, lastcode, sep, _
|
||||
local line, err = %Private.try_receive(control)
|
||||
local answer = line
|
||||
if err then return nil, err end
|
||||
_,_, code, sep = strfind(line, "^(%d%d%d)(.)")
|
||||
if not code or not sep then return nil, answer end
|
||||
if sep == "-" then -- answer is multiline
|
||||
repeat
|
||||
line, err = control:receive()
|
||||
line, err = %Private.try_receive(control)
|
||||
if err then return nil, err end
|
||||
_,_, lastcode, sep = strfind(line, "^(%d%d%d)(.)")
|
||||
answer = answer .. "\n" .. line
|
||||
|
|
@ -130,12 +129,9 @@ end
|
|||
-- code: reply code or nil in case of error
|
||||
-- answer: server complete answer or system error message
|
||||
-----------------------------------------------------------------------------
|
||||
local check_answer = function(control, success)
|
||||
local answer, code = %get_answer(control)
|
||||
if not answer then
|
||||
control:close()
|
||||
return nil, code
|
||||
end
|
||||
function Private.check_answer(control, success)
|
||||
local answer, code = %Private.get_answer(control)
|
||||
if not answer then return nil, code end
|
||||
if type(success) ~= "table" then success = {success} end
|
||||
for i = 1, getn(success) do
|
||||
if code == success[i] then
|
||||
|
|
@ -158,38 +154,10 @@ end
|
|||
-- code: reply code or nil in case of error
|
||||
-- answer: server complete answer or system error message
|
||||
-----------------------------------------------------------------------------
|
||||
local try_command = function(control, cmd, arg, success)
|
||||
local err = %send_command(control, cmd, arg)
|
||||
if err then
|
||||
control:close()
|
||||
return nil, err
|
||||
end
|
||||
local code, answer = %check_answer(control, success)
|
||||
if not code then return nil, answer end
|
||||
return code, answer
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Creates a table with all directories in path
|
||||
-- Input
|
||||
-- file: abolute path to file
|
||||
-- Returns
|
||||
-- a table with the following fields
|
||||
-- name: filename
|
||||
-- path: directory to file
|
||||
-- isdir: is it a directory?
|
||||
-----------------------------------------------------------------------------
|
||||
local split_path = function(file)
|
||||
local parsed = {}
|
||||
file = gsub(file, "(/)$", function(i) %parsed.isdir = i end)
|
||||
if not parsed.isdir then
|
||||
file = gsub(file, "([^/]+)$", function(n) %parsed.name = n end)
|
||||
end
|
||||
file = gsub(file, "/$", "")
|
||||
file = gsub(file, "^/", "")
|
||||
if file == "" then file = nil end
|
||||
parsed.path = file
|
||||
if parsed.path or parsed.name or parsed.isdir then return parsed end
|
||||
function Private.command(control, cmd, arg, success)
|
||||
local err = %Private.send_command(control, cmd, arg)
|
||||
if err then return nil, err end
|
||||
return %Private.check_answer(control, success)
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
|
|
@ -200,11 +168,10 @@ end
|
|||
-- code: nil if error
|
||||
-- answer: server answer or error message
|
||||
-----------------------------------------------------------------------------
|
||||
local check_greeting = function(control)
|
||||
local code, answer = %check_answer(control, {120, 220})
|
||||
if not code then return nil, answer end
|
||||
function Private.greet(control)
|
||||
local code, answer = %Private.check_answer(control, {120, 220})
|
||||
if code == 120 then -- please try again, somewhat busy now...
|
||||
code, answer = %check_answer(control, {220})
|
||||
return %Private.check_answer(control, {220})
|
||||
end
|
||||
return code, answer
|
||||
end
|
||||
|
|
@ -214,16 +181,15 @@ end
|
|||
-- Input
|
||||
-- control: control connection with server
|
||||
-- user: user name
|
||||
-- pass: user password if any
|
||||
-- password: user password if any
|
||||
-- Returns
|
||||
-- code: nil if error
|
||||
-- answer: server answer or error message
|
||||
-----------------------------------------------------------------------------
|
||||
local login = function(control, user, pass)
|
||||
local code, answer = %try_command(control, "user", parsed.user, {230, 331})
|
||||
if not code then return nil, answer end
|
||||
if code == 331 and parsed.pass then -- need pass and we have pass
|
||||
code, answer = %try_command(control, "pass", parsed.pass, {230, 202})
|
||||
function Private.login(control, user, password)
|
||||
local code, answer = %Private.command(control, "user", user, {230, 331})
|
||||
if code == 331 and password then -- need pass and we have pass
|
||||
return %Private.command(control, "pass", password, {230, 202})
|
||||
end
|
||||
return code, answer
|
||||
end
|
||||
|
|
@ -237,12 +203,9 @@ end
|
|||
-- code: nil if error
|
||||
-- answer: server answer or error message
|
||||
-----------------------------------------------------------------------------
|
||||
local cwd = function(control, path)
|
||||
local code, answer = 250, "Home directory used"
|
||||
if path then
|
||||
code, answer = %try_command(control, "cwd", path, {250})
|
||||
end
|
||||
return code, answer
|
||||
function Private.cwd(control, path)
|
||||
if path then return %Private.command(control, "cwd", path, {250})
|
||||
else return 250, nil end
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
|
|
@ -253,20 +216,19 @@ end
|
|||
-- server: server socket bound to local address, nil if error
|
||||
-- answer: error message if any
|
||||
-----------------------------------------------------------------------------
|
||||
local port = function(control)
|
||||
function Private.port(control)
|
||||
local code, answer
|
||||
local server, ctl_ip
|
||||
ctl_ip, answer = control:getsockname()
|
||||
server, answer = bind(ctl_ip, 0)
|
||||
server:timeout(%TIMEOUT)
|
||||
server:timeout(%Public.TIMEOUT)
|
||||
local ip, p, ph, pl
|
||||
ip, p = server:getsockname()
|
||||
pl = mod(p, 256)
|
||||
ph = (p - pl)/256
|
||||
local arg = gsub(format("%s,%d,%d", ip, ph, pl), "%.", ",")
|
||||
code, answer = %try_command(control, "port", arg, {200})
|
||||
code, answer = %Private.command(control, "port", arg, {200})
|
||||
if not code then
|
||||
control:close()
|
||||
server:close()
|
||||
return nil, answer
|
||||
else return server end
|
||||
|
|
@ -280,10 +242,9 @@ end
|
|||
-- code: nil if error
|
||||
-- answer: server answer or error message
|
||||
-----------------------------------------------------------------------------
|
||||
local logout = function(control)
|
||||
local code, answer = %try_command(control, "quit", nil, {221})
|
||||
if not code then return nil, answer end
|
||||
control:close()
|
||||
function Private.logout(control)
|
||||
local code, answer = %Private.command(control, "quit", nil, {221})
|
||||
if code then control:close() end
|
||||
return code, answer
|
||||
end
|
||||
|
||||
|
|
@ -295,10 +256,10 @@ end
|
|||
-- Returns
|
||||
-- nil if successfull, or an error message in case of error
|
||||
-----------------------------------------------------------------------------
|
||||
local receive_indirect = function(data, callback)
|
||||
function Private.receive_indirect(data, callback)
|
||||
local chunk, err, res
|
||||
while not err do
|
||||
chunk, err = data:receive(%BLOCKSIZE)
|
||||
chunk, err = %Private.try_receive(data, %Public.BLOCKSIZE)
|
||||
if err == "closed" then err = "done" end
|
||||
res = callback(chunk, err)
|
||||
if not res then break end
|
||||
|
|
@ -310,33 +271,38 @@ end
|
|||
-- Input
|
||||
-- control: control connection with server
|
||||
-- server: server socket bound to local address
|
||||
-- file: file name under current directory
|
||||
-- isdir: is file a directory name?
|
||||
-- callback: callback to receive file contents
|
||||
-- name: file name
|
||||
-- is_directory: is file a directory name?
|
||||
-- download_cb: callback to receive file contents
|
||||
-- Returns
|
||||
-- err: error message in case of error, nil otherwise
|
||||
-----------------------------------------------------------------------------
|
||||
local retrieve = function(control, server, file, isdir, callback)
|
||||
function Private.retrieve(control, server, name, is_directory, download_cb)
|
||||
local code, answer
|
||||
local data
|
||||
-- ask server for file or directory listing accordingly
|
||||
if isdir then code, answer = %try_command(control, "nlst", file, {150, 125})
|
||||
else code, answer = %try_command(control, "retr", file, {150, 125}) end
|
||||
if is_directory then
|
||||
code, answer = %Private.cwd(control, name)
|
||||
if not code then return answer end
|
||||
code, answer = %Private.command(control, "nlst", nil, {150, 125})
|
||||
else
|
||||
code, answer = %Private.command(control, "retr", name, {150, 125})
|
||||
end
|
||||
if not code then return nil, answer end
|
||||
data, answer = server:accept()
|
||||
server:close()
|
||||
if not data then
|
||||
control:close()
|
||||
return answer
|
||||
end
|
||||
answer = %receive_indirect(data, callback)
|
||||
answer = %Private.receive_indirect(data, download_cb)
|
||||
if answer then
|
||||
control:close()
|
||||
return answer
|
||||
end
|
||||
data:close()
|
||||
-- make sure file transfered ok
|
||||
code, answer = %check_answer(control, {226, 250})
|
||||
if not code then return answer end
|
||||
return %Private.check_answer(control, {226, 250})
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
|
|
@ -344,11 +310,11 @@ end
|
|||
-- Input
|
||||
-- data: data connection
|
||||
-- send_cb: callback to produce file contents
|
||||
-- chunk, size: first callback results
|
||||
-- chunk, size: first callback return values
|
||||
-- Returns
|
||||
-- nil if successfull, or an error message in case of error
|
||||
-----------------------------------------------------------------------------
|
||||
local try_sendindirect = function(data, send_cb, chunk, size)
|
||||
function Private.send_indirect(data, send_cb, chunk, size)
|
||||
local sent, err
|
||||
sent = 0
|
||||
while 1 do
|
||||
|
|
@ -358,9 +324,9 @@ local try_sendindirect = function(data, send_cb, chunk, size)
|
|||
else return "invalid callback return" end
|
||||
end
|
||||
err = data:send(chunk)
|
||||
if err then
|
||||
data:close()
|
||||
return err
|
||||
if err then
|
||||
data:close()
|
||||
return err
|
||||
end
|
||||
sent = sent + strlen(chunk)
|
||||
if sent >= size then break end
|
||||
|
|
@ -379,9 +345,9 @@ end
|
|||
-- code: return code, nil if error
|
||||
-- answer: server answer or error message
|
||||
-----------------------------------------------------------------------------
|
||||
local store = function(control, server, file, send_cb)
|
||||
local data
|
||||
local code, answer = %try_command(control, "stor", file, {150, 125})
|
||||
function Private.store(control, server, file, send_cb)
|
||||
local data, err
|
||||
local code, answer = %Private.command(control, "stor", file, {150, 125})
|
||||
if not code then
|
||||
control:close()
|
||||
return nil, answer
|
||||
|
|
@ -394,7 +360,7 @@ local store = function(control, server, file, send_cb)
|
|||
return nil, answer
|
||||
end
|
||||
-- send whole file
|
||||
err = %try_sendindirect(data, send_cb, send_cb())
|
||||
err = %Private.send_indirect(data, send_cb, send_cb())
|
||||
if err then
|
||||
control:close()
|
||||
return nil, err
|
||||
|
|
@ -402,144 +368,275 @@ local store = function(control, server, file, send_cb)
|
|||
-- close connection to inform that file transmission is complete
|
||||
data:close()
|
||||
-- check if file was received correctly
|
||||
return %check_answer(control, {226, 250})
|
||||
return %Private.check_answer(control, {226, 250})
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Change transfer type
|
||||
-- Input
|
||||
-- control: control connection with server
|
||||
-- type: new transfer type
|
||||
-- Returns
|
||||
-- code: nil if error
|
||||
-- answer: server answer or error message
|
||||
-----------------------------------------------------------------------------
|
||||
local change_type = function(control, type)
|
||||
if type == "b" then type = "i" else type = "a" end
|
||||
return %try_command(control, "type", type, {200})
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Retrieve a file from a ftp server
|
||||
-- Input
|
||||
-- url: file location
|
||||
-- receive_cb: callback to receive file contents
|
||||
-- type: "binary" or "ascii"
|
||||
-- params: "type=i" for binary or "type=a" for ascii
|
||||
-- Returns
|
||||
-- err: error message if any
|
||||
-----------------------------------------------------------------------------
|
||||
function ftp_getindirect(url, receive_cb, type)
|
||||
local control, server, data, err
|
||||
local answer, code, server, pfile, file
|
||||
parsed = %split_url(url, {user = "anonymous", port = 21, pass = %EMAIL})
|
||||
function Private.change_type(control, params)
|
||||
local type
|
||||
if params == "type=i" then type = "i"
|
||||
elseif params == "type=a" then type = "a" end
|
||||
if type then
|
||||
local code, err = %Private.command(control, "type", type, {200})
|
||||
if not code then return err end
|
||||
end
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Starts a control connection, checks the greeting and log on
|
||||
-- Input
|
||||
-- parsed: parsed URL components
|
||||
-- Returns
|
||||
-- control: control connection with server, or nil if error
|
||||
-- err: error message if any
|
||||
-----------------------------------------------------------------------------
|
||||
function Private.open(parsed)
|
||||
-- start control connection
|
||||
control, err = connect(parsed.host, parsed.port)
|
||||
if not control then return err end
|
||||
control:timeout(%TIMEOUT)
|
||||
-- get and check greeting
|
||||
code, answer = %check_greeting(control)
|
||||
if not code then return answer end
|
||||
local control, err = connect(parsed.host, parsed.port)
|
||||
if not control then return nil, err end
|
||||
-- make sure we don't block forever
|
||||
control:timeout(%Public.TIMEOUT)
|
||||
-- check greeting
|
||||
local code, answer = %Private.greet(control)
|
||||
if not code then return nil, answer end
|
||||
-- try to log in
|
||||
code, answer = %login(control, parsed.user, parsed.pass)
|
||||
if not code then return answer end
|
||||
-- go to directory
|
||||
pfile = %split_path(parsed.path)
|
||||
if not pfile then return "invalid path" end
|
||||
code, answer = %cwd(control, pfile.path)
|
||||
if not code then return answer end
|
||||
-- change to binary type?
|
||||
code, answer = %change_type(control, type)
|
||||
if not code then return answer end
|
||||
code, err = %Private.login(control, parsed.user, parsed.password)
|
||||
if not code then return nil, err
|
||||
else return control end
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Closes the connection with the server
|
||||
-- Input
|
||||
-- control: control connection with server
|
||||
-----------------------------------------------------------------------------
|
||||
function Private.close(control)
|
||||
-- disconnect
|
||||
%Private.logout(control)
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Changes to the directory pointed to by URL
|
||||
-- Input
|
||||
-- control: control connection with server
|
||||
-- segment: parsed URL path segments
|
||||
-- Returns
|
||||
-- err: error message if any
|
||||
-----------------------------------------------------------------------------
|
||||
function Private.change_dir(control, segment)
|
||||
local n = getn(segment)
|
||||
for i = 1, n-1 do
|
||||
local code, answer = %Private.cwd(control, segment[i])
|
||||
if not code then return answer end
|
||||
end
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Stores a file in current directory
|
||||
-- Input
|
||||
-- control: control connection with server
|
||||
-- request: a table with the fields:
|
||||
-- upload_cb: send callback to send file contents
|
||||
-- segment: parsed URL path segments
|
||||
-- Returns
|
||||
-- err: error message if any
|
||||
-----------------------------------------------------------------------------
|
||||
function Private.upload(control, request, segment)
|
||||
local code, name, upload_cb
|
||||
-- get remote file name
|
||||
name = segment[getn(segment)]
|
||||
if not name then
|
||||
control:close()
|
||||
return "Invalid file path"
|
||||
end
|
||||
upload_cb = request.upload_cb
|
||||
-- setup passive connection
|
||||
server, answer = %port(control)
|
||||
local server, answer = %Private.port(control)
|
||||
if not server then return answer end
|
||||
-- ask server to receive file
|
||||
code, answer = %Private.store(control, server, name, upload_cb)
|
||||
if not code then return answer end
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Download a file from current directory
|
||||
-- Input
|
||||
-- control: control connection with server
|
||||
-- request: a table with the fields:
|
||||
-- download_cb: receive callback to receive file contents
|
||||
-- segment: parsed URL path segments
|
||||
-- Returns
|
||||
-- err: error message if any
|
||||
-----------------------------------------------------------------------------
|
||||
function Private.download(control, request, segment)
|
||||
local code, name, is_directory, download_cb
|
||||
is_directory = segment.is_directory
|
||||
download_cb = request.download_cb
|
||||
-- get remote file name
|
||||
name = segment[getn(segment)]
|
||||
if not name and not is_directory then
|
||||
control:close()
|
||||
return "Invalid file path"
|
||||
end
|
||||
-- setup passive connection
|
||||
local server, answer = %Private.port(control)
|
||||
if not server then return answer end
|
||||
-- ask server to send file or directory listing
|
||||
err = %retrieve(control, server, pfile.name, pfile.isdir, receive_cb)
|
||||
if err then return err end
|
||||
-- disconnect
|
||||
%logout(control)
|
||||
code, answer = %Private.retrieve(control, server, name,
|
||||
is_directory, download_cb)
|
||||
if not code then return answer end
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Parses the FTP URL setting default values
|
||||
-- Input
|
||||
-- request: a table with the fields:
|
||||
-- url: the target URL
|
||||
-- type: "i" for "image" mode, "a" for "ascii" mode or "d" for directory
|
||||
-- user: account user name
|
||||
-- password: account password
|
||||
-- Returns
|
||||
-- parsed: a table with parsed components
|
||||
-----------------------------------------------------------------------------
|
||||
function Private.parse_url(request)
|
||||
local parsed = URL.parse_url(request.url, {
|
||||
host = "",
|
||||
user = "anonymous",
|
||||
port = 21,
|
||||
path = "/",
|
||||
password = %Public.EMAIL
|
||||
})
|
||||
-- explicit login information overrides that given by URL
|
||||
parsed.user = request.user or parsed.user
|
||||
parsed.password = request.password or parsed.password
|
||||
-- explicit representation type overrides that given by URL
|
||||
if request.type then parsed.params = "type=" .. request.type end
|
||||
return parsed
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Parses the FTP URL path setting default values
|
||||
-- Input
|
||||
-- parsed: a table with the parsed URL components
|
||||
-- Returns
|
||||
-- dirs: a table with parsed directory components
|
||||
-----------------------------------------------------------------------------
|
||||
function Private.parse_path(parsed)
|
||||
local segment = URL.parse_path(parsed.path)
|
||||
segment.is_directory = segment.is_directory or (parsed.params == "type=d")
|
||||
return segment
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Builds a request table from a URL or request table
|
||||
-- Input
|
||||
-- url_or_request: target url or request table (a table with the fields:
|
||||
-- url: the target URL
|
||||
-- type: "i" for "image" mode, "a" for "ascii" mode or "d" for directory
|
||||
-- user: account user name
|
||||
-- password: account password)
|
||||
-- Returns
|
||||
-- request: request table
|
||||
-----------------------------------------------------------------------------
|
||||
function Private.build_request(data)
|
||||
local request = {}
|
||||
if type(data) == "table" then for i, v in data do request[i] = v end
|
||||
else request.url = data end
|
||||
return request
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Downloads a file from a FTP server
|
||||
-- Input
|
||||
-- request: a table with the fields:
|
||||
-- url: the target URL
|
||||
-- type: "i" for "image" mode, "a" for "ascii" mode or "d" for directory
|
||||
-- user: account user name
|
||||
-- password: account password
|
||||
-- download_cb: receive callback to receive file contents
|
||||
-- Returns
|
||||
-- err: error message if any
|
||||
-----------------------------------------------------------------------------
|
||||
function Public.get_cb(request)
|
||||
local parsed = %Private.parse_url(request)
|
||||
local control, err = %Private.open(parsed)
|
||||
if not control then return err end
|
||||
local segment = %Private.parse_path(parsed)
|
||||
return %Private.change_dir(control, segment) or
|
||||
%Private.change_type(control, parsed.params) or
|
||||
%Private.download(control, request, segment) or
|
||||
%Private.close(control)
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Uploads a file to a FTP server
|
||||
-- Input
|
||||
-- url: file location
|
||||
-- send_cb: callback to produce the file contents
|
||||
-- type: "binary" or "ascii"
|
||||
-- request: a table with the fields:
|
||||
-- url: the target URL
|
||||
-- type: "i" for "image" mode, "a" for "ascii" mode or "d" for directory
|
||||
-- user: account user name
|
||||
-- password: account password
|
||||
-- upload_cb: send callback to send file contents
|
||||
-- Returns
|
||||
-- err: error message if any
|
||||
-----------------------------------------------------------------------------
|
||||
function ftp_putindirect(url, send_cb, type)
|
||||
local control, data
|
||||
local answer, code, server, file, pfile
|
||||
parsed = %split_url(url, {user = "anonymous", port = 21, pass = %EMAIL})
|
||||
-- start control connection
|
||||
control, answer = connect(parsed.host, parsed.port)
|
||||
if not control then return answer end
|
||||
control:timeout(%TIMEOUT)
|
||||
-- get and check greeting
|
||||
code, answer = %check_greeting(control)
|
||||
if not code then return answer end
|
||||
-- try to log in
|
||||
code, answer = %login(control, parsed.user, parsed.pass)
|
||||
if not code then return answer end
|
||||
-- go to directory
|
||||
pfile = %split_path(parsed.path)
|
||||
if not pfile or pfile.isdir then return "invalid path" end
|
||||
code, answer = %cwd(control, pfile.path)
|
||||
if not code then return answer end
|
||||
-- change to binary type?
|
||||
code, answer = %change_type(control, type)
|
||||
if not code then return answer end
|
||||
-- setup passive connection
|
||||
server, answer = %port(control)
|
||||
if not server then return answer end
|
||||
-- ask server to send file
|
||||
code, answer = %store(control, server, pfile.name, send_cb)
|
||||
if not code then return answer end
|
||||
-- disconnect
|
||||
%logout(control)
|
||||
-- no errors
|
||||
return nil
|
||||
function Public.put_cb(request)
|
||||
local parsed = %Private.parse_url(request)
|
||||
local control, err = %Private.open(parsed)
|
||||
if not control then return err end
|
||||
local segment = %Private.parse_path(parsed)
|
||||
return %Private.change_dir(control, segment) or
|
||||
%Private.change_type(control, parsed.params) or
|
||||
%Private.upload(control, request, segment) or
|
||||
%Private.close(control)
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Uploads a file to a FTP server
|
||||
-- Input
|
||||
-- url: file location
|
||||
-- bytes: file contents
|
||||
-- type: "binary" or "ascii"
|
||||
-- url_or_request: target url or request table (a table with the fields:
|
||||
-- url: the target URL
|
||||
-- type: "i" for "image" mode, "a" for "ascii" mode or "d" for directory
|
||||
-- user: account user name
|
||||
-- password: account password)
|
||||
-- content: file contents
|
||||
-- Returns
|
||||
-- err: error message if any
|
||||
-----------------------------------------------------------------------------
|
||||
function ftp_put(url, bytes, type)
|
||||
local send_cb = function()
|
||||
return %bytes, strlen(%bytes)
|
||||
function Public.put(url_or_request, content)
|
||||
local request = %Private.build_request(url_or_request)
|
||||
request.upload_cb = function()
|
||||
return %content, strlen(%content)
|
||||
end
|
||||
return ftp_putindirect(url, send_cb, type)
|
||||
return %Public.put_cb(request)
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- We need fast concatenation routines for direct requests
|
||||
-----------------------------------------------------------------------------
|
||||
dofile("buffer.lua")
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Retrieve a file from a ftp server
|
||||
-- Input
|
||||
-- url: file location
|
||||
-- type: "binary" or "ascii"
|
||||
-- url_or_request: target url or request table (a table with the fields:
|
||||
-- url: the target URL
|
||||
-- type: "i" for "image" mode, "a" for "ascii" mode or "d" for directory
|
||||
-- user: account user name
|
||||
-- password: account password)
|
||||
-- Returns
|
||||
-- data: file contents as a string
|
||||
-- err: error message in case of error, nil otherwise
|
||||
-----------------------------------------------------------------------------
|
||||
function ftp_get(url, type)
|
||||
local bytes = { buf = buf_create() }
|
||||
local receive_cb = function(chunk, err)
|
||||
if not chunk then %bytes.buf = nil end
|
||||
buf_addstring(%bytes.buf, chunk)
|
||||
function Public.get(url_or_request)
|
||||
local cat = Concat.create()
|
||||
local request = %Private.build_request(url_or_request)
|
||||
request.download_cb = function(chunk, err)
|
||||
if chunk then %cat:addstring(chunk) end
|
||||
return 1
|
||||
end
|
||||
err = ftp_getindirect(url, receive_cb, type)
|
||||
return buf_getresult(bytes.buf), err
|
||||
local err = %Public.get_cb(request)
|
||||
return cat:getresult(), err
|
||||
end
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user