view mod_http_logging/mod_http_logging.lua @ 3866:c0df50ce96f0

mod_rest: Handle internal http request errors early and then return Skips over attempted parsing of the payload which usually failed since the body is an error string like "connection refused", so this produced useless errors.
author Kim Alvefur <zash@zash.se>
date Sat, 25 Jan 2020 20:22:12 +0100
parents c89be016a075
children
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-- mod_http_logging
--
-- Copyright (C) 2015 Kim Alvefur
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
-- Produces HTTP logs in the style of Apache
--
-- TODO
-- * Configurable format?

module:set_global();

local server = require "net.http.server";

local function get_content_len(response, body)
	local len = response.headers.content_length;
	if len then return len; end
	if not body then body = response.body; end
	if body then return #tostring(body); end
end

local function log_response(response, body)
	local len = tostring(get_content_len(response, body) or "-");
	local request = response.request;
	local ip = request.ip;
	if not ip and request.conn then
		ip = request.conn:ip();
	end
	local req = string.format("%s %s HTTP/%s", request.method, request.path, request.httpversion);
	local date = os.date("%d/%m/%Y:%H:%M:%S %z");
	module:log("info", "%s - - [%s] \"%s\" %d %s", ip, date, req, response.status_code, len);
end

local send_response = server.send_response;
local function log_and_send_response(response, body)
	if not response.finished then
		log_response(response, body);
	end
	return send_response(response, body);
end

local send_file = server.send_file;
local function log_and_send_file(response, f)
	if not response.finished then
		log_response(response);
	end
	return send_file(response, f);
end

if module.wrap_object_event then
	-- Use object event wrapping, allows clean unloading of the module
	module:wrap_object_event(server._events, false, function (handlers, event_name, event_data)
		if event_data.response then
			event_data.response.send = log_and_send_response;
			event_data.response.send_file = log_and_send_file;
		end
		return handlers(event_name, event_data);
	end);
else
	-- Fall back to monkeypatching, unlikely to behave nicely in the
	-- presence of other modules also doing this
	server.send_response = log_and_send_response;
	server.send_file = log_and_send_file;
	function module.unload()
		server.send_response = send_response;
		server.send_file = send_file;
	end
end