net.server_select: Better detection of errors for outgoing connections
On connection failure, a socket is marked readable and writable. So
to detect initial connection failures (connection refused, etc.) we
now watch for sockets becoming readable during initial connection,
and also read from readable sockets before writing to writable
sockets.
This should fix 'onconnect' being called for outgoing connections
that actually failed.
local t_concat = table.concat;
local path_sep = package.config:sub(1,1);
local path_util = {}
-- Helper function to resolve relative paths (needed by config)
function path_util.resolve_relative_path(parent_path, path)
if path then
-- Some normalization
parent_path = parent_path:gsub("%"..path_sep.."+$", "");
path = path:gsub("^%.%"..path_sep.."+", "");
local is_relative;
if path_sep == "/" and path:sub(1,1) ~= "/" then
is_relative = true;
elseif path_sep == "\\" and (path:sub(1,1) ~= "/" and (path:sub(2,3) ~= ":\\" and path:sub(2,3) ~= ":/")) then
is_relative = true;
end
if is_relative then
return parent_path..path_sep..path;
end
end
return path;
end
-- Helper function to convert a glob to a Lua pattern
function path_util.glob_to_pattern(glob)
return "^"..glob:gsub("[%p*?]", function (c)
if c == "*" then
return ".*";
elseif c == "?" then
return ".";
else
return "%"..c;
end
end).."$";
end
function path_util.join(...)
return t_concat({...}, path_sep);
end
return path_util;