annotate mod_http_logging/mod_http_logging.lua @ 2966:678be8ea4d38

mod_http_logging: Factor out body length calculation
author Kim Alvefur <zash@zash.se>
date Fri, 30 Mar 2018 13:35:43 +0200
parents 557c976735e1
children 135ca695fcbf
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1 -- mod_http_logging
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2 --
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3 -- Copyright (C) 2015 Kim Alvefur
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4 --
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c625ed20ebda mod_http_logging: MIT
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8 -- Produces HTTP logs in the style of Apache
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9 --
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10 -- TODO
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11 -- * Configurable format?
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12
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13 module:set_global();
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14
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15 local server = require "net.http.server";
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16
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17 local function get_content_len(response, body)
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18 local len = response.headers.content_length;
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19 if len then return len; end
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20 if not body then body = request.body; end
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21 if body then return #tostring(body); end
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22 end
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23
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24 local function log_response(response, body)
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25 local len = tostring(get_content_len(response, body) or "-");
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26 local request = response.request;
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27 local ip = request.conn:ip();
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28 local req = string.format("%s %s HTTP/%s", request.method, request.path, request.httpversion);
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29 local date = os.date("%d/%m/%Y:%H:%M:%S %z");
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30 module:log("info", "%s - - [%s] \"%s\" %d %s", ip, date, req, response.status_code, len);
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31 end
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32
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33 local send_response = server.send_response;
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34 local function log_and_send_response(response, body)
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35 if not response.finished then
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36 log_response(response, body);
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37 end
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38 return send_response(response, body);
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39 end
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40
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41 if module.wrap_object_event then
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42 -- Use object event wrapping, allows clean unloading of the module
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43 module:wrap_object_event(server._events, false, function (handlers, event_name, event_data)
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44 if event_data.response then
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45 event_data.response.send = log_and_send_response;
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46 end
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47 return handlers(event_name, event_data);
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48 end);
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49 else
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50 -- Fall back to monkeypatching, unlikely to behave nicely in the
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51 -- presence of other modules also doing this
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52 server.send_response = log_and_send_response;
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53 function module.unload()
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54 server.send_response = send_response;
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55 end
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56 end