+#!/usr/bin/ruby
+
+require "apache_log_regex"
+require "file-tail"
+require "json"
+
+def categorise_uri(line)
+ uri = line.split(" ")[1]
+
+ case uri
+ when %r{api/0\.6/map} then :map
+ when %r{api/0\.6/changeset/[0-9]*/upload} then :upload
+ when %r{api/0\.6/amf} then :amf
+ when %r{api/0\.6/(node|way|relation)/[0-9]*/history} then :history
+ when %r{api/0\.6/(node|way|relation)/[0-9]*/full} then :full
+ when %r{api/0\.6/trackpoints} then :trkpts
+ when %r{api/0\.6/} then :other
+ else :web
+ end
+end
+
+parser = ApacheLogRegex.new('%h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\" %Ts')
+last_write = Time.now
+statistics = { :status => Hash.new(0), :uri => Hash.new(0) }
+
+File::Tail::Logfile.tail("/var/log/apache2/access.log") do |line|
+ begin
+ hash = parser.parse(line)
+ status = hash["%>s"]
+ uri = categorise_uri(hash["%r"])
+
+ statistics[:status][status] += 1
+ statistics[:uri][uri] += 1
+ rescue ApacheLogRegex::ParseError
+ # nil
+ end
+
+ if Time.now - last_write > 10
+ File.write("/srv/www.openstreetmap.org/rails/tmp/statistics.json", statistics.to_json)
+ last_write = Time.now
+ end
+end