Class: VarnishLog

Inherits:
Object
  • Object
show all
Defined in:
lib/varnishlog/request.rb,
lib/varnishlog/response.rb,
lib/varnishlog/varnishlog.rb

Overview

VarnishLog - A class to define objects that contain a transaction captured

by `varnishlog`.

Defined Under Namespace

Classes: Request, Response

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ VarnishLog

Create a new VarnishLog object.

Returns a VarnishLog object with two attributes that are request and response objects.



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# File 'lib/varnishlog/varnishlog.rb', line 17

def initialize
  @request = VarnishLog::Request.new
  @response = VarnishLog::Response.new
end

Instance Attribute Details

#request ⇒ Object (readonly)

Returns the value of attribute request.



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# File 'lib/varnishlog/varnishlog.rb', line 12

def request
  @request
end

#response ⇒ Object (readonly)

Returns the value of attribute response.



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# File 'lib/varnishlog/varnishlog.rb', line 12

def response
  @response
end

Instance Method Details

#parse(transaction) ⇒ Object

Parses the output of a transaction captured by ‘varnishlog` into attributes that are assigned to a VarnishLog object.



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# File 'lib/varnishlog/varnishlog.rb', line 36

def parse(transaction)
  items = transaction.split("\n")

  # Requests
  ## Request headers.
  request_headers = items.grep(/ReqHeader/)
  request_headers.each do |header|
    if match = /-\s+ReqHeader\s+(?<header_name>.*): (?<header_value>.*)/.match(header)
      @request.add_header(match['header_name'], match['header_value'])
    end
  end

  ## Match ReqMethod.
  if method_match = /-\s+ReqMethod\s+(?<method>.*)/.match(items.grep(/ReqMethod/)[0])
    @request.method = method_match['method']
  end
  ## Match ReqURL.
  if url_match = /-\s+ReqURL\s+(?<url>\/.*)/.match(items.grep(/ReqURL/)[0])
    @request.url = url_match['url']
  end
  ## Match ReqProtocol.
  if protocol_match = /-\s+ReqProtocol\s+(?<protocol>.*)/.match(items.grep(/ReqProtocol/)[0])
    @request.protocol = protocol_match['protocol']
  end

  # Response.
  ## Response headers.
  response_headers = items.grep(/RespHeader/)
  response_headers.each do |header|
    if match = /-\s+RespHeader\s+(?<header_name>.*): (?<header_value>.*)/.match(header)
      @response.add_header(match['header_name'], match['header_value'])
    end
  end

end

#reap_thread ⇒ Object 



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# File 'lib/varnishlog/varnishlog.rb', line 29

def reap_thread
  transaction = @varnishlog_thread.value
  parse(transaction)
end

#start_varnishlog_thread(user_agent = "shellac") ⇒ Object 



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# File 'lib/varnishlog/varnishlog.rb', line 22

def start_varnishlog_thread(user_agent="shellac")
  @varnishlog_thread = Thread.new {
    output = `varnishlog -q 'ReqHeader:User-Agent eq "#{user_agent}"' -k 1`
  }
  @varnishlog_thread
end