net.unbound: Show canonical name in textual format (e.g. in shell)
libunbound does not tell us the whole chain of CNAMEs, only the final
canonical name.
This is to aid in debugging since it will only be shown in the shell.
-- 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 debug = require "prosody.util.debug";
-- Helper functions for debugging
local log = require "prosody.util.logger".init("util.debug");
local function log_events(events, name, logger)
local f = events.fire_event;
if not f then
error("Object does not appear to be a util.events object");
end
logger = logger or log;
name = name or tostring(events);
function events.fire_event(event, ...)
logger("debug", "%s firing event: %s", name, event);
return f(event, ...);
end
local function event_handler_hook(handler, event_name, event_data)
logger("debug", "calling handler for %s: %s", event_name, handler);
local ok, ret = pcall(handler, event_data);
if not ok then
logger("error", "error in event handler %s: %s", handler, ret);
error(ret);
end
if ret ~= nil then
logger("debug", "event chain ended for %s by %s with result: %s", event_name, handler, ret);
end
return ret;
end
events.set_debug_hook(event_handler_hook);
events[events.fire_event] = f;
return events;
end
local function revert_log_events(events)
events.fire_event, events[events.fire_event] = events[events.fire_event], nil; -- :))
events.set_debug_hook(nil);
end
local function log_host_events(host)
return log_events(prosody.hosts[host].events, host);
end
local function revert_log_host_events(host)
return revert_log_events(prosody.hosts[host].events);
end
local function show_events(events, specific_event)
local event_handlers = events._handlers;
local events_array = {};
local event_handler_arrays = {};
for event, priorities in pairs(events._event_map) do
local handlers = event_handlers[event];
if handlers and (event == specific_event or not specific_event) then
table.insert(events_array, event);
local handler_strings = {};
for i, handler in ipairs(handlers) do
local upvals = debug.string_from_var_table(debug.get_upvalues_table(handler));
handler_strings[i] = " "..(priorities[handler] or "?")..": "..tostring(handler)..(upvals and ("\n "..upvals) or "");
end
event_handler_arrays[event] = handler_strings;
end
end
table.sort(events_array);
local i = 1;
while i <= #events_array do
local handlers = event_handler_arrays[events_array[i]];
for j=#handlers, 1, -1 do
table.insert(events_array, i+1, handlers[j]);
end
if i > 1 then events_array[i] = "\n"..events_array[i]; end
i = i + #handlers + 1
end
return table.concat(events_array, "\n");
end
local function get_upvalue(f, get_name)
local i, name, value = 0;
repeat
i = i + 1;
name, value = debug.getupvalue(f, i);
until name == get_name or name == nil;
return value;
end
return {
log_host_events = log_host_events;
revert_log_host_events = revert_log_host_events;
log_events = log_events;
revert_log_events = revert_log_events;
show_events = show_events;
get_upvalue = get_upvalue;
};