applications/luci-app-statistics/luasrc/controller/luci_statistics/luci_statistics.lua

   1 -- Copyright 2008 Freifunk Leipzig / Jo-Philipp Wich <jow@openwrt.org>
   2 -- Copyright 2012 Jo-Philipp Wich <jow@openwrt.org>
   3 -- Licensed to the public under the Apache License 2.0.
   4
   5 module("luci.controller.luci_statistics.luci_statistics", package.seeall)
   6
   7 function index()
   8
   9         require("nixio.fs")
  10         require("luci.util")
  11         require("luci.statistics.datatree")
  12
  13         -- override entry(): check for existence <plugin>.so where <plugin> is derived from the called path
  14         function _entry( path, ... )
  15                 local file = path[5] or path[4]
  16                 if nixio.fs.access( "/usr/lib/collectd/" .. file .. ".so" ) then
  17                         entry( path, ... )
  18                 end
  19         end
  20
  21         local labels = {
  22                 s_output        = _("Output plugins"),
  23                 s_general       = _("General plugins"),
  24                 s_network       = _("Network plugins"),
  25         }
  26
  27         -- our collectd menu
  28         local collectd_menu = {
  29                 output  = { },
  30                 general = { },
  31                 network = { }
  32         }
  33
  34         local plugin_dir = "/usr/lib/lua/luci/statistics/plugins/"
  35         for filename in nixio.fs.dir(plugin_dir) do
  36                 local plugin_fun = loadfile(plugin_dir .. filename)
  37                 setfenv(plugin_fun, { _ = luci.i18n.translate })
  38                 local plugin = plugin_fun()
  39                 local name = filename:gsub("%.lua", "")
  40                 table.insert(collectd_menu[plugin.category], name)
  41                 labels[name] = plugin.label
  42         end
  43
  44         -- create toplevel menu nodes
  45         local st = entry({"admin", "statistics"}, template("admin_statistics/index"), _("Statistics"), 80)
  46         st.index = true
  47
  48         entry({"admin", "statistics", "collectd"}, cbi("luci_statistics/collectd"), _("Setup"), 20).subindex = true
  49
  50
  51         -- populate collectd plugin menu
  52         local index = 1
  53         for section, plugins in luci.util.kspairs( collectd_menu ) do
  54                 local e = entry(
  55                         { "admin", "statistics", "collectd", section },
  56                         firstchild(), labels["s_"..section], index * 10
  57                 )
  58
  59                 e.index = true
  60
  61                 for j, plugin in luci.util.vspairs( plugins ) do
  62                         _entry(
  63                                 { "admin", "statistics", "collectd", section, plugin },
  64                                 cbi("luci_statistics/" .. plugin ),
  65                                 labels[plugin] or plugin, j * 10
  66                         )
  67                 end
  68
  69                 index = index + 1
  70         end
  71
  72         -- output views
  73         local page = entry( { "admin", "statistics", "graph" }, template("admin_statistics/index"), _("Graphs"), 10)
  74               page.setuser  = "nobody"
  75               page.setgroup = "nogroup"
  76
  77         local vars = luci.http.formvalue(nil, true)
  78         local span = vars.timespan or nil
  79         local host = vars.host or nil
  80
  81         -- get rrd data tree
  82         local tree = luci.statistics.datatree.Instance(host)
  83
  84         local _, plugin, idx
  85         for _, plugin, idx in luci.util.vspairs( tree:plugins() ) do
  86
  87                 -- get plugin instances
  88                 local instances = tree:plugin_instances( plugin )
  89
  90                 -- load plugin menu entry from the description
  91                 local plugin_name = "luci.statistics.rrdtool.definitions." .. plugin
  92                 local stat, def = pcall( require, plugin_name )
  93                 if stat and def and type(def.item) == "function" then
  94                         entry(
  95                                 { "admin", "statistics", "graph", plugin },
  96                                 call("statistics_render"), def.item(), idx
  97                         ).query = { timespan = span , host = host }
  98                 end
  99
 100                 -- if more then one instance is found then generate submenu
 101                 if #instances > 1 then
 102                         local _, inst, idx2
 103                         for _, inst, idx2 in luci.util.vspairs(instances) do
 104                                 -- instance menu entry
 105                                 entry(
 106                                         { "admin", "statistics", "graph", plugin, inst },
 107                                         call("statistics_render"), inst, idx2
 108                                 ).query = { timespan = span , host = host }
 109                         end
 110                 end
 111         end
 112 end
 113
 114 function statistics_render()
 115
 116         require("luci.statistics.rrdtool")
 117         require("luci.template")
 118         require("luci.model.uci")
 119
 120         local vars  = luci.http.formvalue()
 121         local req   = luci.dispatcher.context.request
 122         local path  = luci.dispatcher.context.path
 123         local uci   = luci.model.uci.cursor()
 124         local spans = luci.util.split( uci:get( "luci_statistics", "collectd_rrdtool", "RRATimespans" ), "%s+", nil, true )
 125         local span  = vars.timespan or uci:get( "luci_statistics", "rrdtool", "default_timespan" ) or spans[1]
 126         local host  = vars.host     or uci:get( "luci_statistics", "collectd", "Hostname" ) or luci.sys.hostname()
 127         local opts = { host = vars.host }
 128         local graph = luci.statistics.rrdtool.Graph( luci.util.parse_units( span ), opts )
 129         local hosts = graph.tree:host_instances()
 130
 131         local is_index = false
 132         local i, p, inst, idx
 133
 134         -- deliver image
 135         if vars.img then
 136                 local l12 = require "luci.ltn12"
 137                 local png = io.open(graph.opts.imgpath .. "/" .. vars.img:gsub("%.+", "."), "r")
 138                 if png then
 139                         luci.http.prepare_content("image/png")
 140                         l12.pump.all(l12.source.file(png), luci.http.write)
 141                 end
 142                 return
 143         end
 144
 145         local plugin, instances
 146         local images = { }
 147
 148         -- find requested plugin and instance
 149         for i, p in ipairs( luci.dispatcher.context.path ) do
 150                 if luci.dispatcher.context.path[i] == "graph" then
 151                         plugin    = luci.dispatcher.context.path[i+1]
 152                         instances = { luci.dispatcher.context.path[i+2] }
 153                 end
 154         end
 155
 156         -- no instance requested, find all instances
 157         if #instances == 0 then
 158                 --instances = { graph.tree:plugin_instances( plugin )[1] }
 159                 instances = graph.tree:plugin_instances( plugin )
 160                 is_index = (#instances > 1)
 161
 162         -- index instance requested
 163         elseif instances[1] == "-" then
 164                 instances[1] = ""
 165                 is_index = true
 166         end
 167
 168         -- render graphs
 169         for i, inst in luci.util.vspairs( instances ) do
 170                 for i, img in luci.util.vspairs( graph:render( plugin, inst, is_index ) ) do
 171                         table.insert( images, graph:strippngpath( img ) )
 172                         images[images[#images]] = inst
 173                 end
 174         end
 175
 176         luci.template.render( "public_statistics/graph", {
 177                 images           = images,
 178                 plugin           = plugin,
 179                 timespans        = spans,
 180                 current_timespan = span,
 181                 hosts            = hosts,
 182                 current_host     = host,
 183                 is_index         = is_index
 184         } )
 185 end