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-----------------------------------------------------------------------------
-- Little program to download DICT word definitions
-- LuaSocket sample files
-- Author: Diego Nehab
-- RCS ID: $Id: dict.lua,v 1.7 2003/08/16 00:06:04 diego Exp $
-----------------------------------------------------------------------------
function get_status(sock, valid)
local line, err = sock:receive()
local code, par
if not line then sock:close() return err end
_, _, code = string.find(line, "^(%d%d%d)")
code = tonumber(code)
if code ~= valid then return code end
if code == 150 then
_,_,_, par = string.find(line, "^(%d%d%d) (%d*)")
par = tonumber(par)
end
return nil, par
end
function get_def(sock)
local line, err = sock:receive()
local def = ""
while (not err) and line ~= "." do
def = def .. line .. "\n"
line, err = sock:receive()
end
if err then sock:close() return nil, err
else return def end
end
function dict_open()
local sock, err = socket.connect("dict.org", 2628)
if not sock then return nil, err end
sock:settimeout(10)
local code, par = get_status(sock, 220)
if code then return nil, code end
return sock
end
function dict_define(sock, word, dict)
dict = dict or "web1913"
sock:send("DEFINE " .. dict .. " " .. word .. "\r\n")
local code, par = get_status(sock, 150)
if code or not par then return nil, code end
local defs = ""
for i = 1, par do
local def
code, par = get_status(sock, 151)
if code then return nil, code end
def, err = get_def(sock)
if not def then return nil, err end
defs = defs .. def .. "\n"
end
code, par = get_status(sock, 250)
if code then return nil, code end
return string.gsub(defs, "%s%s$", "")
end
function dict_close(sock)
sock:send("QUIT\r\n")
local code, par = get_status(sock, 221)
sock:close()
return code
end
function dict_get(word, dict)
local sock, err = dict_open()
if not sock then return nil, err end
local defs, err = dict_define(sock, word, dict)
dict_close(sock)
return defs, err
end
if arg and arg[1] then
defs, err = dict_get(arg[1], arg[2])
print(defs or err)
else
io.write("Usage:\n luasocket dict.lua <word> [<dictionary>]\n")
end
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