Initial commit v0.0.1

.gitignore

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+pkg/*
+*.gem
+.bundle

Gemfile

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+source "http://rubygems.org"
+
+# Specify your gem's dependencies in haproxy.gemspec
+gemspec

Rakefile

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+require 'bundler'
+Bundler::GemHelper.install_tasks

lib/haproxy.rb

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+libdir = File.dirname(__FILE__)
+$LOAD_PATH.unshift(libdir) unless $LOAD_PATH.include?(libdir)
+
+require 'uri'
+Dir["#{libdir}/haproxy/*.rb"].each do |file|
+  require file
+end
+
+module HAProxy
+
+  def self.read_stats(from)
+    uri = URI.parse(from)
+
+    if uri.is_a?(URI::Generic) and File.socket?(uri.path)
+      HAProxy::SocketReader.new(uri.path)
+    else
+      raise NotImplementedError, "Currently only sockets are implemented"
+    end
+  end
+
+end

lib/haproxy/csv_parser.rb

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+module HAProxy
+  class CSVParser
+
+    # Uses CSV header from HAProxy 1.5, which is backwards compatible
+    COLUMNS = "pxname,svname,qcur,qmax,scur,smax,slim,stot,bin,bout,dreq,dresp,ereq,econ,eresp,wretr,wredis,status,weight,act,bck,chkfail,chkdown,lastchg,downtime,qlimit,pid,iid,sid,throttle,lbtot,tracked,type,rate,rate_lim,rate_max,check_status,check_code,check_duration,hrsp_1xx,hrsp_2xx,hrsp_3xx,hrsp_4xx,hrsp_5xx,hrsp_other,hanafail,req_rate,req_rate_max,req_tot,cli_abrt,srv_abrt".split(",").map(&:to_sym)
+    LIMIT = COLUMNS.length
+
+    def self.parse(line)
+      line.strip!
+      unless line.start_with? "#"
+        data = line.split(',')
+        pxname = data.shift
+
+        stats = { :pxname => pxname }
+
+        data.each_with_index do |value, i|
+          if i < LIMIT
+            stats[COLUMNS[i + 1]] = value
+          else
+            stats[:extra] = Array.new if stats[:extra].nil?
+            stats[:extra] << value
+          end
+        end
+
+        stats
+      else
+        raise ArgumentError, "Line is a comment"
+      end
+    end
+  end
+
+end

lib/haproxy/socket_reader.rb

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+require 'socket'
+require 'haproxy/stats_reader'
+require 'haproxy/csv_parser'
+
+module HAProxy
+  class SocketReader < HAProxy::StatsReader
+
+    def initialize(path)
+      @path = path
+    end
+
+    def info
+      returning({}) do |info|
+        send_cmd "show info" do |line|
+          key, value = line.split(': ')
+          info[key.downcase.gsub('-', '_').to_sym] = value
+        end
+      end
+    end
+
+    def errors
+      returning("") do |errors|
+        send_cmd "show errors" do |line|
+          errors << line
+        end
+      end
+    end
+
+    def sessions
+      returning([]) do |sess|
+        send_cmd "show sess" do |line|
+          sess << line
+        end
+      end
+    end
+
+    TYPES = {
+      :frontend => 1,
+      :backend => 2,
+      :server => 4
+    }
+
+    def stats(types=[:all], options={})
+      params = {
+        :proxy => :all,
+        :server => :all
+      }.merge(options)
+
+      params[:proxy] = "-1" if params[:proxy].eql?(:all)
+      params[:server] = "-1" if params[:server].eql?(:all)
+
+      types = [types] unless types.is_a?(Array)
+
+      params[:type] = case
+                      when types.eql?([:all])
+                        "-1"
+                      else
+                        types.map{ |type| TYPES[type] }.inject(:+)
+                      end
+
+      cmd = "show stat #{params[:proxy]} #{params[:type]} #{params[:server]}"
+
+      returning([]) do |stats|
+        send_cmd(cmd) do |line|
+          stats << CSVParser.parse(line) unless line.start_with?('#')
+        end
+      end
+    end
+
+    def frontends
+      stats :frontend, :proxy => :all, :server => :all
+    end
+
+    def backends
+      stats :frontend, :proxy => :all, :server => :all
+    end
+
+    def servers
+      stats :server, :proxy => :all, :server => :all
+    end
+
+    protected
+
+    def send_cmd(cmd, &block)
+      socket = UNIXSocket.new(@path)
+      socket.puts(cmd)
+      socket.each do |line|
+        yield(line.strip)
+      end
+    end
+
+  end
+end

lib/haproxy/stats_reader.rb

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+libdir = File.dirname(__FILE__)
+$LOAD_PATH.unshift(libdir) unless $LOAD_PATH.include?(libdir)
+
+module HAProxy
+
+  class StatsReader
+
+    def info
+      raise NotImplementedError
+    end
+
+    def errors
+      raise NotImplementedError
+    end
+
+    def sessions
+      raise NotImplementedError
+    end
+
+    def stats
+      raise NotImplementedError
+    end
+
+    def frontends
+      raise NotImplementedError
+    end
+
+    def backends
+      raise NotImplementedError
+    end
+
+    def servers
+      raise NotImplementedError
+    end
+
+    protected
+
+    # Borrowed from Rails 3
+    def returning(value)
+      yield(value)
+      value
+    end
+
+    private
+
+    def initialize
+    end
+
+  end
+
+end

lib/haproxy/version.rb

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+module Haproxy
+  VERSION = "0.0.1"
+end