nginx-lua now stores log data into shared dict

1 files changed, 65 insertions, 0 deletions

diff --git a/src/daq/nginx-lua/s5-nginx-log.lua b/src/daq/nginx-lua/s5-nginx-log.lua
new file mode 100644
index 0000000..f81bb8e
--- /dev/null
+++ b/src/daq/nginx-lua/s5-nginx-log.lua
@@ -0,0 +1,65 @@
+--
+-- sfive
+--
+-- sfive - spreadspace streaming statistics suite is a generic
+-- statistic collection tool for streaming server infrastuctures.
+-- The system collects and stores meta data like number of views
+-- and throughput from a number of streaming servers and stores
+-- it in a global data store.
+-- The data acquisition is designed to be generic and extensible in
+-- order to support different streaming software.
+-- sfive also contains tools and applications to filter and visualize
+-- live and recorded data.
+--
+--
+-- Copyright (C) 2014 Christian Pointner <equinox@spreadspace.org>
+--                    Markus Grueneis <gimpf@gimpf.org>
+--
+-- This file is part of sfive.
+--
+-- sfive is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License version 3
+-- as published by the Free Software Foundation.
+--
+-- sfive is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with sfive. If not, see <http://www.gnu.org/licenses/>.
+--
+--
+-- Install this by adding the following to your nginx.conf
+--
+-- location /path/to/hls {
+--   log_by_lua_file '/path/to/s5-nginx-log.lua';
+-- }
+--
+
+local status = ngx.var.status
+
+if status == '200' or status == '206' then
+   local sfive = ngx.shared.sfive;
+   local idx, err = sfive:incr("log_idx", 1)
+   if not idx then
+      ngx.log(ngx.ERR, "SFive: incrementing index failed: " .. err)
+   else
+      local json = '{'
+      json = json .. '"time": "' .. string.gsub(ngx.utctime(), " ", "T", 1) .. '",'
+      json = json .. '"client": "' .. ngx.var.remote_addr .. '",'
+      json = json .. '"port": ' .. ngx.var.remote_port .. ','
+      json = json .. '"ua": "' .. ngx.var.http_user_agent .. '",'
+      json = json .. '"uri": "' .. ngx.var.uri .. '",'
+      json = json .. '"status": ' .. status .. ','
+      json = json .. '"bytes_sent": ' .. ngx.var.bytes_sent
+      json = json .. '}'
+
+      local succ, err, forc = sfive:add("log_" .. idx, json, 600)
+      if not succ then
+         ngx.log(ngx.ERR, "SFive: adding log line (log_" .. idx ") to shared dict: " .. err)
+      elseif forc then
+         ngx.log(ngx.WARN, "SFive: adding log line has overwritten other log lines - consider increasing the shared dict")
+      end
+   end
+end