Class: Conveyor::App

Inherits:
Object
  • Object
show all
Defined in:
lib/conveyor/server.rb

Instance Method Summary collapse

Constructor Details

#initialize(data_directory, *options) ⇒ App

Returns a new instance of App.



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# File 'lib/conveyor/server.rb', line 11

def initialize(data_directory, *options)
  options = options.inject(){|(k, v), m| m[k] = v; m}
  @data_directory = data_directory
  @log_directory  = options[:log_directory]
  @unsafe_mode    = options[:unsafe_mode] # allows deleting of channels. REALLY UNSAFE!
  @verbose        = options[:verbose]

  if @log_directory
    @logger = Logger.new File.join(@log_directory, 'conveyor.log')
  else
    @logger = Logger.new '/dev/null'
  end

  t0 = Time.now
  i "reading data"

  @channels = {}
  Dir.entries(@data_directory).each do |e|
    if !['.', '..'].include?(e) && File.directory?(File.join(@data_directory, e)) && Channel.valid_channel_name?(e)
      i "initializing channel '#{e}'"
      @channels[e] = Channel.new(File.join(@data_directory, e))
    end
  end

  i "done reading data (took #{Time.now - t0} sec.)"

  @requests = 0
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/conveyor/server.rb', line 169

def call(env)
  if @verbose
    pp env
  end
  @requests += 1
  if env['REQUEST_METHOD']    == 'PUT'  && m = path_match(env, %r{/channels/(.*)})
    put(env, m)
  elsif env['REQUEST_METHOD'] == 'POST' && m = path_match(env, %r{/channels/(.*)})
    post(env, m)
  elsif @unsafe_mode && env['REQUEST_METHOD'] == 'DELETE' && m = path_match(env, %r{/channels/(.*)})
    delete(env, m)
  elsif env['REQUEST_METHOD'] == 'GET'
    get(env)
  else
    i "#{env["REMOTE_ADDR"]} #{env["REQUEST_METHOD"]} #{env["REQUEST_PATH"]} 404"
    [404, {}, '']
  end
end

#create_new_channel(channel_name) ⇒ Object 



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# File 'lib/conveyor/server.rb', line 44

def create_new_channel channel_name
  @channels[channel_name] = Conveyor::Channel.new(File.join(@data_directory, channel_name))
end

#delete(env, m) ⇒ Object 



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# File 'lib/conveyor/server.rb', line 161

def delete env, m
  if @channels.key?(m.captures[0])
    @channels[m.captures[0]].delete!
    @channels.delete(m.captures[0])
    [200, {}, "Channel deleted."]
  end
end

#get(env) ⇒ Object 



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# File 'lib/conveyor/server.rb', line 106

def get env
  headers = content = nil
  if m = path_match(env, %r{/channels/(.*)/(\d+)})
    if @channels.key?(m.captures[0])
      headers, content = @channels[m.captures[0]].get(m.captures[1].to_i)
    end
  elsif m = path_match(env, %r{/channels/(.*)})
    if @channels.key?(m.captures[0])
      params = Mongrel::HttpRequest.query_parse(env['QUERY_STRING'])
      if params.key? 'next'
        if params.key? 'group'
          if params.key? 'n'
            list = @channels[m.captures[0]].get_next_n_by_group(params['n'].to_i, params['group'])
          else
            headers, content = @channels[m.captures[0]].get_next_by_group(params['group'])
          end
        else
          if params.key? 'n'
            list = @channels[m.captures[0]].get_next_n(params['n'].to_i).map do |i|
              {:data => i[1], :hash => i[0][:hash], :id => i[0][:id]}
            end
          else
            headers, content = @channels[m.captures[0]].get_next
          end
        end
      elsif params.key? 'after'
        headers, content = @channels[m.captures[0]].get_nearest_after_timestamp(params['after'].to_i)
      else
        return [200, {}, @channels[m.captures[0]].status.to_json]
      end
    end
  else
    return [200, {}, "fake!"]
  end

  if headers && content
    i "#{env["REMOTE_ADDR"]} GET #{env["REQUEST_PATH"]} 200 #{headers[:id]} #{headers[:length]} #{headers[:hash]}"
    return [
      200,
      {
        'Content-Location' => "/channels/#{m.captures[0]}/#{headers[:id]}",
        'Content-MD5'      => headers[:hash],
        'Content-Type'     => 'application/octet-stream',
        'Last-Modified'    => Time.at(headers[:time]).gmtime.to_s,
      },
        content
    ]
  elsif list
    return [200, {}, list.to_json]
  end

  i "#{env["REMOTE_ADDR"]} #{env["REQUEST_METHOD"]} #{env["REQUEST_PATH"]} 404"
  return [404, {}, '']
end

#i(msg) ⇒ Object 



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# File 'lib/conveyor/server.rb', line 48

def i msg
  @logger.info msg
end

#path_match(env, pattern) ⇒ Object 



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# File 'lib/conveyor/server.rb', line 40

def path_match env, pattern
  env["REQUEST_PATH"].match(pattern)
end

#post(env, m) ⇒ Object 



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# File 'lib/conveyor/server.rb', line 68

def post env, m
  if @channels.key?(m.captures[0])
    params = Mongrel::HttpRequest.query_parse(env['QUERY_STRING'])
    if params.key?('rewind_id')
      if params['group']
        @channels[m.captures[0]].rewind(:id => params['rewind_id'], :group => params['group']).to_i # TODO make sure this is an integer
        [200, {}, "iterator rewound to #{params['rewind_id']}"]
      else
        @channels[m.captures[0]].rewind(:id => params['rewind_id']).to_i # TODO make sure this is an integer
        [200, {}, "iterator rewound to #{params['rewind_id']}"]
      end
    elsif params.key?('rewind_time')
      if params['group']
        @channels[m.captures[0]].rewind(:time => params['rewind_time'].to_i, :group => params['group']).to_i # TODO make sure this is an integer
        [200, {}, "iterator rewound to #{params['rewind_id']}"]
      else
        @channels[m.captures[0]].rewind(:time => params['rewind_time'].to_i) # TODO make sure this is an integer
        [200, {}, "iterator rewound to #{params['rewind_time']}"]
      end
    else
      if env.key?('HTTP_DATE') && d = Time.parse(env['HTTP_DATE'])
        id = @channels[m.captures[0]].post(env['rack.input'].read)
        i "#{env["REMOTE_ADDR"]} POST #{env["REQUEST_PATH"]} 202"
        [202, {"Location" => "/channels/#{m.captures[0]}/#{id}"}, ""]
      else
        i "#{env["REMOTE_ADDR"]} POST #{env["REQUEST_PATH"]} 400"
        [400, {}, "A valid Date header is required for all POSTs."]
      end
    end
  elsif Channel.valid_channel_name?(m.captures[0])
    create_new_channel(m.captures[0])
    post(env, m)
  else
    i "#{env["REMOTE_ADDR"]} #{env["REQUEST_METHOD"]} #{env["REQUEST_PATH"]} 404"
    [404, {}, '']
  end
end

#put(env, m) ⇒ Object 



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# File 'lib/conveyor/server.rb', line 52

def put env, m
  if Channel.valid_channel_name?(m.captures[0])
    if !@channels.key?(m.captures[0])
      create_new_channel m.captures[0]
      i "#{env["REMOTE_ADDR"]} PUT #{env["REQUEST_PATH"]} 201"
      [201, {}, "created channel #{m.captures[0]}"]
    else
      i "#{env["REMOTE_ADDR"]} PUT #{env["REQUEST_PATH"]} 202"
      [202, {}, "channel already exists. didn't do anything"]
    end
  else
    i "#{env["REMOTE_ADDR"]} GET #{env["REQUEST_PATH"]} 406"
    [406, {}, "invalid channel name. must match #{Channel::NAME_PATTERN}"]
  end
end