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util/set.lua @ 12187:94253e02d47d
mod_http: Limit unencrypted http port (5280) to loopback by default
Since accessing this port directly over the wider Internet is unlikely
to intentional anymore. Most uses will likely be by reverse proxies, by
mistake or because of trouble configuring HTTPS.
Blocking mistaken uses is just a good thing, letting users send
potentially private things unencrypted tends to be Strongly Discouraged
these days.
Many reverse proxy setups operate over loopback, so listening there
instead of all interfaces is a net improvement.
Improved automatic certificate location and SNI support has mostly
eliminated the need for manual certificate configuration so HTTPS should
Just Work once certificates have been provided.
For local testing during development, connecting over loopback is likely
fine as well. When really needed, `http_interfaces` can still be set.
Suggested by Link Mauve
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Sat, 15 Jan 2022 15:13:41 +0100 |
parent | 11788:1ceee8becb1a |
child | 12986:895a82c5d8d4 |
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-- Prosody IM -- Copyright (C) 2008-2010 Matthew Wild -- Copyright (C) 2008-2010 Waqas Hussain -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- local ipairs, pairs, setmetatable, next, tostring = ipairs, pairs, setmetatable, next, tostring; local getmetatable = getmetatable; local t_concat = table.concat; local _ENV = nil; -- luacheck: std none local set_mt = { __name = "set" }; function set_mt.__call(set, _, k) return next(set._items, k); end local items_mt = {}; function items_mt.__call(items, _, k) return next(items, k); end function set_mt:__freeze() local a, i = {}, 1; for item in self._items do a[i], i = item, i+1; end return a; end local function is_set(o) local mt = getmetatable(o); return mt == set_mt; end local function new(list) local items = setmetatable({}, items_mt); local set = { _items = items }; -- We access the set through an upvalue in these methods, so ignore 'self' being unused --luacheck: ignore 212/self function set:add(item) items[item] = true; end function set:contains(item) return items[item]; end function set:contains_set(other_set) for item in other_set do if not self:contains(item) then return false; end end return true; end function set:items() return next, items; end function set:remove(item) items[item] = nil; end function set:add_list(item_list) if item_list then for _, item in ipairs(item_list) do items[item] = true; end end end function set:include(otherset) for item in otherset do items[item] = true; end end function set:exclude(otherset) for item in otherset do items[item] = nil; end end function set:empty() return not next(items); end if list then set:add_list(list); end return setmetatable(set, set_mt); end local function union(set1, set2) local set = new(); local items = set._items; for item in pairs(set1._items) do items[item] = true; end for item in pairs(set2._items) do items[item] = true; end return set; end local function difference(set1, set2) local set = new(); local items = set._items; for item in pairs(set1._items) do items[item] = (not set2._items[item]) or nil; end return set; end local function intersection(set1, set2) local set = new(); local items = set._items; set1, set2 = set1._items, set2._items; for item in pairs(set1) do items[item] = (not not set2[item]) or nil; end return set; end local function xor(set1, set2) return union(set1, set2) - intersection(set1, set2); end function set_mt.__add(set1, set2) return union(set1, set2); end function set_mt.__sub(set1, set2) return difference(set1, set2); end function set_mt.__div(set, func) local new_set = new(); local items, new_items = set._items, new_set._items; for item in pairs(items) do local new_item = func(item); if new_item ~= nil then new_items[new_item] = true; end end return new_set; end function set_mt.__eq(set1, set2) if getmetatable(set1) ~= set_mt or getmetatable(set2) ~= set_mt then -- Lua 5.3+ calls this if both operands are tables, even if metatables differ return false; end set1, set2 = set1._items, set2._items; for item in pairs(set1) do if not set2[item] then return false; end end for item in pairs(set2) do if not set1[item] then return false; end end return true; end function set_mt.__tostring(set) local s, items = { }, set._items; for item in pairs(items) do s[#s+1] = tostring(item); end return t_concat(s, ", "); end return { new = new; is_set = is_set; union = union; difference = difference; intersection = intersection; xor = xor; };