Class: HttpClient::Request

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

Overview

This class is used internally by HttpClient to send the request, but you can also access it internally if you’d like to use a method not directly supported by the main API. For example:

HttpClient::Request.execute(:method => :head, :url => 'http://example.com')

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ Request

Returns a new instance of Request.



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# File 'lib/http_client/request.rb', line 20

def initialize(args)
  @method = args[:method] or raise ArgumentError, "must pass :method"
  @url = args[:url] or raise ArgumentError, "must pass :url"
  @headers = args[:headers] || {}
  @cookies = @headers.delete(:cookies) || args[:cookies] || {}
  @payload = process_payload(args[:payload])
  @user = args[:user]
  @password = args[:password]
  @timeout = args[:timeout]
  @open_timeout = args[:open_timeout]
  @raw_response = args[:raw_response] || false
  @verify_ssl = args[:verify_ssl] || false
  @ssl_client_cert = args[:ssl_client_cert] || nil
  @ssl_client_key  = args[:ssl_client_key] || nil
  @ssl_ca_file = args[:ssl_ca_file] || nil
  @tf = nil # If you are a raw request, this is your tempfile
end

Instance Attribute Details

#cookies ⇒ Object (readonly)

Returns the value of attribute cookies.



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# File 'lib/http_client/request.rb', line 11

def cookies
  @cookies
end

#headers ⇒ Object (readonly)

Returns the value of attribute headers.



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# File 'lib/http_client/request.rb', line 11

def headers
  @headers
end

#method ⇒ Object (readonly)

Returns the value of attribute method.



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# File 'lib/http_client/request.rb', line 11

def method
  @method
end

#open_timeout ⇒ Object (readonly)

Returns the value of attribute open_timeout.



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# File 'lib/http_client/request.rb', line 11

def open_timeout
  @open_timeout
end

#password ⇒ Object (readonly)

Returns the value of attribute password.



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# File 'lib/http_client/request.rb', line 11

def password
  @password
end

#payload ⇒ Object (readonly)

Returns the value of attribute payload.



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# File 'lib/http_client/request.rb', line 11

def payload
  @payload
end

#raw_response ⇒ Object (readonly)

Returns the value of attribute raw_response.



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# File 'lib/http_client/request.rb', line 11

def raw_response
  @raw_response
end

#ssl_ca_file ⇒ Object (readonly)

Returns the value of attribute ssl_ca_file.



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# File 'lib/http_client/request.rb', line 11

def ssl_ca_file
  @ssl_ca_file
end

#ssl_client_cert ⇒ Object (readonly)

Returns the value of attribute ssl_client_cert.



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# File 'lib/http_client/request.rb', line 11

def ssl_client_cert
  @ssl_client_cert
end

#ssl_client_key ⇒ Object (readonly)

Returns the value of attribute ssl_client_key.



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# File 'lib/http_client/request.rb', line 11

def ssl_client_key
  @ssl_client_key
end

#timeout ⇒ Object (readonly)

Returns the value of attribute timeout.



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# File 'lib/http_client/request.rb', line 11

def timeout
  @timeout
end

#url ⇒ Object (readonly)

Returns the value of attribute url.



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# File 'lib/http_client/request.rb', line 11

def url
  @url
end

#user ⇒ Object (readonly)

Returns the value of attribute user.



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# File 'lib/http_client/request.rb', line 11

def user
  @user
end

#verify_ssl ⇒ Object (readonly)

Returns the value of attribute verify_ssl.



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# File 'lib/http_client/request.rb', line 11

def verify_ssl
  @verify_ssl
end

Class Method Details

.execute(args) ⇒ Object 



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# File 'lib/http_client/request.rb', line 16

def self.execute(args)
  new(args).execute
end

Instance Method Details

#decode(content_encoding, body) ⇒ Object 



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# File 'lib/http_client/request.rb', line 168

def decode(content_encoding, body)
  if content_encoding == 'gzip' and not body.empty?
    Zlib::GzipReader.new(StringIO.new(body)).read
  elsif content_encoding == 'deflate'
    Zlib::Inflate.new.inflate(body)
  else
    body
  end
end

#default_headers ⇒ Object 



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# File 'lib/http_client/request.rb', line 203

def default_headers
  { :accept => 'application/xml', :accept_encoding => 'gzip, deflate' }
end

#display_log(msg) ⇒ Object 



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# File 'lib/http_client/request.rb', line 191

def display_log(msg)
  return unless log_to = HttpClient.log

  if log_to == 'stdout'
    STDOUT.puts msg
  elsif log_to == 'stderr'
    STDERR.puts msg
  else
    File.open(log_to, 'a') { |f| f.puts msg }
  end
end

#execute ⇒ Object 



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# File 'lib/http_client/request.rb', line 38

def execute
  uri = parse_url_with_auth(url)
  transmit uri, net_http_request_class(method).new(uri.request_uri, make_headers(headers)), payload
end

#fetch_body(http_response) ⇒ Object 



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# File 'lib/http_client/request.rb', line 135

def fetch_body(http_response)
  if @raw_response
    # Taken from Chef, which as in turn...
    # Stolen from http://www.ruby-forum.com/topic/166423
    # Kudos to _why!
    @tf = Tempfile.new("http-client") 
    size, total = 0, http_response.header['Content-Length'].to_i
    http_response.read_body do |chunk|
      @tf.write(chunk) 
      size += chunk.size
      if size == 0
        display_log("#{@method} #{@url} done (0 length file)")
      elsif total == 0
        display_log("#{@method} #{@url} (zero content length)")
      else
        display_log("#{@method} #{@url} %d%% done (%d of %d)" % [(size * 100) / total, size, total])
      end
    end
    @tf.close
    @tf
  else
    http_response.read_body
  end
  http_response
end

#make_headers(user_headers) ⇒ Object 



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# File 'lib/http_client/request.rb', line 43

def make_headers(user_headers)
  unless @cookies.empty?
    user_headers[:cookie] = @cookies.map {|key, val| "#{key.to_s}=#{val}" }.join('; ')
  end

  default_headers.merge(user_headers).inject({}) do |final, (key, value)|
    final[key.to_s.gsub(/_/, '-').capitalize] = value.to_s
  final
  end
end

#net_http_class ⇒ Object 



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# File 'lib/http_client/request.rb', line 54

def net_http_class
  if HttpClient.proxy
    proxy_uri = URI.parse(HttpClient.proxy)
    Net::HTTP::Proxy(proxy_uri.host, proxy_uri.port, proxy_uri.user, proxy_uri.password)
  else
    Net::HTTP
  end
end

#net_http_request_class(method) ⇒ Object 



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# File 'lib/http_client/request.rb', line 63

def net_http_request_class(method)
  Net::HTTP.const_get(method.to_s.capitalize)
end

#parse_url(url) ⇒ Object 



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# File 'lib/http_client/request.rb', line 67

def parse_url(url)
  url = "http://#{url}" unless url.match(/^http/)
  URI.parse(url)
end

#parse_url_with_auth(url) ⇒ Object 



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# File 'lib/http_client/request.rb', line 72

def parse_url_with_auth(url)
  uri = parse_url(url)
  @user = uri.user if uri.user
  @password = uri.password if uri.password
  uri
end

#process_payload(p = nil, parent_key = nil) ⇒ Object 



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# File 'lib/http_client/request.rb', line 79

def process_payload(p=nil, parent_key=nil)
  unless p.is_a?(Hash)
    p
  else
    @headers[:content_type] ||= 'application/x-www-form-urlencoded'
    p.keys.map do |k|
      key = parent_key ? "#{parent_key}[#{k}]" : k
      if p[k].is_a? Hash
        process_payload(p[k], key)
      else
        value = URI.escape(p[k].to_s, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]"))
        "#{key}=#{value}"
      end
    end.join("&")
  end
end

#process_result(res) ⇒ Object 



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# File 'lib/http_client/request.rb', line 161

def process_result(res)
  # We don't decode raw requests
  unless @raw_response
    decode res['content-encoding'], res.body if res.body
  end
end

#request_log ⇒ Object 



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# File 'lib/http_client/request.rb', line 178

def request_log
  out = []
  out << "HttpClient.#{method} #{url.inspect}"
  out << (payload.size > 100 ? "(#{payload.size} byte payload)".inspect : payload.inspect) if payload
  out << headers.inspect.gsub(/^\{/, '').gsub(/\}$/, '') unless headers.empty?
  out.join(', ')
end

#response_log(res) ⇒ Object 



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# File 'lib/http_client/request.rb', line 186

def response_log(res)
  size = @raw_response ? File.size(@tf.path) : res.body.size
  "# => #{res.code} #{res.class.to_s.gsub(/^Net::HTTP/, '')} | #{(res['Content-type'] || '').gsub(/;.*$/, '')} #{size} bytes"
end

#setup_credentials(req) ⇒ Object 



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# File 'lib/http_client/request.rb', line 131

def setup_credentials(req)
  req.basic_auth(user, password) if user
end

#transmit(uri, req, payload) ⇒ Object 



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# File 'lib/http_client/request.rb', line 96

def transmit(uri, req, payload)
  setup_credentials(req)

  net = net_http_class.new(uri.host, uri.port)
  net.use_ssl = uri.is_a?(URI::HTTPS)
  net.verify_mode = OpenSSL::SSL::VERIFY_NONE if @verify_ssl == false
  net.cert = @ssl_client_cert if @ssl_client_cert
  net.key = @ssl_client_key if @ssl_client_key
  net.ca_file = @ssl_ca_file if @ssl_ca_file
  net.read_timeout = @timeout if @timeout
  net.open_timeout = @open_timeout if @open_timeout

  display_log request_log

  net.start do |http|
    res = http.request(req, payload) { |http_response| fetch_body(http_response) }
    result = process_result(res)
    display_log response_log(res)

    if result.kind_of?(String) or @method == :head
      Response.new(result, res)
    elsif @raw_response
      RawResponse.new(@tf, res)
    else
      nil
    end
  end
rescue EOFError
  raise HttpClient::ServerBrokeConnection
rescue Timeout::Error
  raise HttpClient::RequestTimeout
rescue Errno::ECONNREFUSED
  raise HttpClient::ConnectionRefused
end