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local M = { _NAME = "uri._login" }
local Util = require "uri._util"
local URI = require "uri"
Util.subclass_of(M, URI)
-- Generic terminal logins. This is used as a base class for 'telnet' and
-- 'ftp' URL schemes.
local function _valid_userinfo (userinfo)
if userinfo then
local colon = userinfo:find(":")
if colon and userinfo:find(":", colon + 1) then
return nil, "only one colon allowed in userinfo"
end
end
return true
end
-- TODO - this is a bit of a hack because currently subclasses are required
-- to know whether their superclass has one of these that needs calling.
-- It should be called from 'init' before anything more specific is done,
-- and it has the same calling convention.
-- According to RFC 1738 there should be at most one colon in the userinfo.
-- I apply that restriction for schemes where it's used for a username/password
-- pair.
function M.init_base (self)
local host = self:host()
if not host or host == "" then
return nil, "host missing from login URI"
end
local ok, err = _valid_userinfo(self:userinfo())
if not ok then return nil, err end
return self
end
function M.userinfo (self, ...)
if select("#", ...) > 0 then
local ok, err = _valid_userinfo(...)
if not ok then error("invalid userinfo value (" .. err .. ")") end
end
return M._SUPER.userinfo(self, ...)
end
function M.username (self, ...)
local info = M._SUPER.userinfo(self)
local old, colon
if info then
local colon = info and info:find(":")
old = colon and info:sub(1, colon - 1) or info
old = Util.uri_decode(old)
end
if select('#', ...) > 0 then
local pass = colon and info:sub(colon) or "" -- includes colon
local new = ...
if not new then
M._SUPER.userinfo(self, nil)
else
-- Escape anything that's not allowed in a userinfo, and also
-- colon, because that indicates the end of the username.
new = Util.uri_encode(new, "^A-Za-z0-9%-._~!$&'()*+,;=")
M._SUPER.userinfo(self, new .. pass)
end
end
return old
end
function M.password (self, ...)
local info = M._SUPER.userinfo(self)
local old, colon
if info then
colon = info and info:find(":")
old = colon and info:sub(colon + 1) or nil
if old then old = Util.uri_decode(old) end
end
if select('#', ...) > 0 then
local new = ...
local user = colon and info:sub(1, colon - 1) or info
if not new then
M._SUPER.userinfo(self, user)
else
if not user then user = "" end
new = Util.uri_encode(new, "^A-Za-z0-9%-._~!$&'()*+,;=")
M._SUPER.userinfo(self, user .. ":" .. new)
end
end
return old
end
return M
-- vi:ts=4 sw=4 expandtab
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