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prosody
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util/interpolation.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 | 11307:f2e276bb4ef8 |
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-- Simple template language -- -- The new() function takes a pattern and an escape function and returns -- a render() function. Both are required. -- -- The function render() takes a string template and a table of values. -- Sequences like {name} in the template string are substituted -- with values from the table, optionally depending on a modifier -- symbol. -- -- Variants are: -- {name} is substituted for values["name"] and is escaped using the -- second argument to new_render(). To disable the escaping, use {name!}. -- {name.item} can be used to access table items. -- To renter lists of items: {name# item number {idx} is {item} } -- Or key-value pairs: {name% t[ {idx} ] = {item} } -- To show a defaults for missing values {name? sub-template } can be used, -- which renders a sub-template if values["name"] is false-ish. -- {name& sub-template } does the opposite, the sub-template is rendered -- if the selected value is anything but false or nil. local type, tostring = type, tostring; local pairs, ipairs = pairs, ipairs; local s_sub, s_gsub, s_match = string.sub, string.gsub, string.match; local t_concat = table.concat; local function new_render(pat, escape, funcs) -- assert(type(pat) == "string", "bad argument #1 to 'new_render' (string expected)"); -- assert(type(escape) == "function", "bad argument #2 to 'new_render' (function expected)"); local function render(template, values) -- assert(type(template) == "string", "bad argument #1 to 'render' (string expected)"); -- assert(type(values) == "table", "bad argument #2 to 'render' (table expected)"); return (s_gsub(template, pat, function (block) block = s_sub(block, 2, -2); local name, raw, opt, e = s_match(block, "^([%a_][%w_.]*)(!?)(%p?)()"); if not name then return end local value = values[name]; if not value and name:find(".", 2, true) then value = values; for word in name:gmatch"[^.]+" do value = value[word]; if not value then break; end end end if funcs then while opt == '|' do local f; f, raw, opt, e = s_match(block, "^([%a_][%w_.]*)(!?)(%p?)()", e); f = funcs[f]; if value ~= nil and f then value = f(value); end end end if opt == '#' or opt == '%' then if type(value) ~= "table" then return ""; end local iter = opt == '#' and ipairs or pairs; local out, i, subtpl = {}, 1, s_sub(block, e); local subvalues = setmetatable({}, { __index = values }); for idx, item in iter(value) do subvalues.idx = idx; subvalues.item = item; out[i], i = render(subtpl, subvalues), i+1; end return t_concat(out); elseif opt == '&' then if not value then return ""; end return render(s_sub(block, e), values); elseif opt == '~' then if value then return ""; end return render(s_sub(block, e), values); elseif opt == '?' and not value then return render(s_sub(block, e), values); elseif value ~= nil then if type(value) ~= "string" then value = tostring(value); end if raw ~= '!' then return escape(value); end return value; end end)); end return render; end return { new = new_render; };