add freifunk_node

default.nix

@@ -18,7 +18,7 @@ let
       buildInputs = [ gems.wrappedRuby ];
 
       buildCommand = ''
-        install -D -m755 $script $out/bin/${name}
+        install -D -m755 ${script} $out/bin/${name}
         patchShebangs $out/bin/${name}
       '';
     };
@@ -27,4 +27,5 @@ in {
   luftdaten = wrapScript "luftdaten" ./luftdaten/scrape.rb;
   fhem = wrapScript "fhem" ./fhem/scrape.rb;
   matemat = wrapScript "matemat" ./matemat/scrape.rb;
+  freifunk_node = wrapScript "freifunk_node" ./freifunk_node/scrape.rb;
 }

freifunk_node/scrape.rb

@@ -0,0 +1,59 @@
+#!/usr/bin/env ruby
+
+require 'open-uri'
+require 'json'
+require 'influxdb'
+
+HOST = ARGV[0]
+
+data = JSON.parse open("http://#{HOST}/sysinfo-json.cgi").read()
+
+values = {}
+
+def recurse(data, values, prefix='')
+  new_prefix = proc do |name|
+    if prefix == ""
+      name
+    else
+      "#{prefix}.#{name}"
+    end
+  end
+  
+  if data.kind_of? Hash
+    data.each do |k, v|
+      recurse v, values, new_prefix.call(k)
+    end
+  elsif data.kind_of? Array
+    data.zip(0..).each do |(v, i)|
+      recurse v, values, new_prefix.call(i)
+    end
+  elsif data.kind_of? String and data != ""
+    data.strip!
+    data = data.split(/,/)
+    if data.length > 1
+      data.zip(0..).each do |(v, i)|
+        recurse v, values, new_prefix.call(i)
+      end
+    else
+      data = data[0].split(/ +/)
+      if data.length > 1
+        data.zip(0..).each do |(v, i)|
+          recurse v, values, new_prefix.call(i)
+        end
+      else
+        if data[0] =~ /^\d+$/
+          values[prefix] = data[0].to_i
+        end
+      end
+    end
+  elsif data.kind_of? Integer or data.kind_of? Float
+    values[prefix] = data
+  end
+end
+
+
+node_id = data['data']['common']['node']
+recurse data['data'], values
+
+db = InfluxDB::Client.new(url: "http://grafana.hq.c3d2.de:8086/freifunk")
+db.write_point 'node', { values: values, tags: { node_id: node_id } }