Class: RedirectFollower

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

Defined Under Namespace

Classes: TooManyRedirects

Constant Summary collapse

REDIRECT_DEFAULT_LIMIT = 
5

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(url, limit = REDIRECT_DEFAULT_LIMIT, options = {}) ⇒ RedirectFollower 


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# File 'lib/redirect_follower.rb', line 9

def initialize(url, limit = REDIRECT_DEFAULT_LIMIT, options = {})
  if limit.is_a? Hash
    options = limit
    limit = REDIRECT_DEFAULT_LIMIT
  end
  @url, @redirect_limit = url, limit
  @headers = options[:headers] || {}
end

Instance Attribute Details

#body ⇒ Object

Returns the value of attribute body


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# File 'lib/redirect_follower.rb', line 7

def body
  @body
end

#headers ⇒ Object

Returns the value of attribute headers


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# File 'lib/redirect_follower.rb', line 7

def headers
  @headers
end

#redirect_limit ⇒ Object

Returns the value of attribute redirect_limit


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# File 'lib/redirect_follower.rb', line 7

def redirect_limit
  @redirect_limit
end

#response ⇒ Object

Returns the value of attribute response


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# File 'lib/redirect_follower.rb', line 7

def response
  @response
end

#url ⇒ Object

Returns the value of attribute url


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# File 'lib/redirect_follower.rb', line 7

def url
  @url
end

Instance Method Details

#redirect_url ⇒ Object 


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# File 'lib/redirect_follower.rb', line 41

def redirect_url
  if response['location'].nil?
    response.body.match(/<a href=\"([^>]+)\">/i)[1]
  else
    response['location']
  end
end

#resolve ⇒ Object

Raises:


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# File 'lib/redirect_follower.rb', line 18

def resolve
  raise TooManyRedirects if redirect_limit < 0

  uri = URI.parse(URI.escape(url))

  http = Net::HTTP.new(uri.host, uri.port)
  if uri.scheme == 'https'
    http.use_ssl = true
    http.verify_mode = OpenSSL::SSL::VERIFY_PEER
  end

  self.response = http.request_get(uri.request_uri, @headers)

  if response.kind_of?(Net::HTTPRedirection)
    self.url = redirect_url
    self.redirect_limit -= 1
    resolve
  end

  self.body = response.body
  self
end