mod_http: Allow disabling CORS in the http_cors_override option and by default
Fixes #1779.
Due to an oversight in the logic, if the user set 'enabled' to false in an
override, it would disable the item's requested CORS settings, but still apply
Prosody's default CORS policy.
This change ensures that 'enabled = false' will now disable CORS entirely for
the requested item.
Due to the new structure of the code, it was necessary to have a flag to say
whether CORS is to be applied at all. Rather than hard-coding 'true' here, I
chose to add a new option: 'http_default_cors_enabled'. This is a boolean that
allows the operator to disable Prosody's default CORS policy entirely (the one
that is used when a module or config does not override it). This makes it
easier to disable CORS and then selectively enable it only on services you
want it on.
-- 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.
--
--
-- luacheck: ignore 213/i
local t_concat, t_insert = table.concat, table.insert;
local char, format = string.char, string.format;
local tonumber = tonumber;
local ipairs = ipairs;
local io_write = io.write;
local m_floor = math.floor;
local type = type;
local setmetatable = setmetatable;
local pairs = pairs;
local windows;
if os.getenv("WINDIR") then
windows = require "util.windows";
end
local orig_color = windows and windows.get_consolecolor and windows.get_consolecolor();
local _ENV = nil;
-- luacheck: std none
local stylemap = {
reset = 0; bright = 1, dim = 2, underscore = 4, blink = 5, reverse = 7, hidden = 8;
black = 30; red = 31; green = 32; yellow = 33; blue = 34; magenta = 35; cyan = 36; white = 37;
["black background"] = 40; ["red background"] = 41; ["green background"] = 42; ["yellow background"] = 43;
["blue background"] = 44; ["magenta background"] = 45; ["cyan background"] = 46; ["white background"] = 47;
bold = 1, dark = 2, underline = 4, underlined = 4, normal = 0;
}
local winstylemap = {
["0"] = orig_color, -- reset
["1"] = 7+8, -- bold
["1;33"] = 2+4+8, -- bold yellow
["1;31"] = 4+8 -- bold red
}
local cssmap = {
[1] = "font-weight: bold", [2] = "opacity: 0.5", [4] = "text-decoration: underline", [8] = "visibility: hidden",
[30] = "color:black", [31] = "color:red", [32]="color:green", [33]="color:#FFD700",
[34] = "color:blue", [35] = "color: magenta", [36] = "color:cyan", [37] = "color: white",
[40] = "background-color:black", [41] = "background-color:red", [42]="background-color:green",
[43]="background-color:yellow", [44] = "background-color:blue", [45] = "background-color: magenta",
[46] = "background-color:cyan", [47] = "background-color: white";
};
local fmt_string = char(0x1B).."[%sm%s"..char(0x1B).."[0m";
local function getstring(style, text)
if style then
return format(fmt_string, style, text);
else
return text;
end
end
local function gray(n)
return m_floor(n*3/32)+0xe8;
end
local function color(r,g,b)
if r == g and g == b then
return gray(r);
end
r = m_floor(r*3/128);
g = m_floor(g*3/128);
b = m_floor(b*3/128);
return 0x10 + ( r * 36 ) + ( g * 6 ) + ( b );
end
local function hex2rgb(hex)
local r = tonumber(hex:sub(1,2),16);
local g = tonumber(hex:sub(3,4),16);
local b = tonumber(hex:sub(5,6),16);
return r,g,b;
end
setmetatable(stylemap, { __index = function(_, style)
if type(style) == "string" and style:find("%x%x%x%x%x%x") == 1 then
local g = style:sub(7) == " background" and "48;5;" or "38;5;";
return format("%s%d", g, color(hex2rgb(style)));
end
end } );
local csscolors = {
red = "ff0000"; fuchsia = "ff00ff"; green = "008000"; white = "ffffff";
lime = "00ff00"; yellow = "ffff00"; purple = "800080"; blue = "0000ff";
aqua = "00ffff"; olive = "808000"; black = "000000"; navy = "000080";
teal = "008080"; silver = "c0c0c0"; maroon = "800000"; gray = "808080";
}
for colorname, rgb in pairs(csscolors) do
stylemap[colorname] = stylemap[colorname] or stylemap[rgb];
colorname, rgb = colorname .. " background", rgb .. " background"
stylemap[colorname] = stylemap[colorname] or stylemap[rgb];
end
local function getstyle(...)
local styles, result = { ... }, {};
for i, style in ipairs(styles) do
style = stylemap[style];
if style then
t_insert(result, style);
end
end
return t_concat(result, ";");
end
local last = "0";
local function setstyle(style)
style = style or "0";
if style ~= last then
io_write("\27["..style.."m");
last = style;
end
end
if windows then
function setstyle(style)
style = style or "0";
if style ~= last then
windows.set_consolecolor(winstylemap[style] or orig_color);
last = style;
end
end
if not orig_color then
function setstyle() end
end
end
local function ansi2css(ansi_codes)
if ansi_codes == "0" then return "</span>"; end
local css = {};
for code in ansi_codes:gmatch("[^;]+") do
t_insert(css, cssmap[tonumber(code)]);
end
return "</span><span style='"..t_concat(css, ";").."'>";
end
local function tohtml(input)
return input:gsub("\027%[(.-)m", ansi2css);
end
return {
getstring = getstring;
getstyle = getstyle;
setstyle = setstyle;
tohtml = tohtml;
};