Class: HTTPAdapter::NetHTTPAdapter

Inherits:
Object
  • Object
show all
Includes:
HTTPAdapter
Defined in:
lib/httpadapter/adapters/net_http.rb

Constant Summary collapse

METHOD_MAPPING = 
{
  # RFC 2616
  'OPTIONS' => Net::HTTP::Options,
  'GET' => Net::HTTP::Get,
  'HEAD' => Net::HTTP::Head,
  'POST' => Net::HTTP::Post,
  'PUT' => Net::HTTP::Put,
  'DELETE' => Net::HTTP::Delete,
  'TRACE' => Net::HTTP::Trace,
  # Other standards supported by Net::HTTP
  'COPY' => Net::HTTP::Copy,
  'LOCK' => Net::HTTP::Lock,
  'MKCOL' => Net::HTTP::Mkcol,
  'MOVE' => Net::HTTP::Move,
  'PROPFIND' => Net::HTTP::Propfind,
  'PROPPATCH' => Net::HTTP::Proppatch,
  'UNLOCK' => Net::HTTP::Unlock
}
STATUS_MESSAGES = 
{
  100 => "Continue",
  101 => "Switching Protocols",
  102 => "Processing",

  200 => "OK",
  201 => "Created",
  202 => "Accepted",
  203 => "Non-Authoritative Information",
  204 => "No Content",
  205 => "Reset Content",
  206 => "Partial Content",
  207 => "Multi-Status",
  226 => "IM Used",

  300 => "Multiple Choices",
  301 => "Moved Permanently",
  302 => "Found",
  303 => "See Other",
  304 => "Not Modified",
  305 => "Use Proxy",
  307 => "Temporary Redirect",

  400 => "Bad Request",
  401 => "Unauthorized",
  402 => "Payment Required",
  403 => "Forbidden",
  404 => "Not Found",
  405 => "Method Not Allowed",
  406 => "Not Acceptable",
  407 => "Proxy Authentication Required",
  408 => "Request Timeout",
  409 => "Conflict",
  410 => "Gone",
  411 => "Length Required",
  412 => "Precondition Failed",
  413 => "Request Entity Too Large",
  414 => "Request-URI Too Long",
  415 => "Unsupported Media Type",
  416 => "Requested Range Not Satisfiable",
  417 => "Expectation Failed",
  422 => "Unprocessable Entity",
  423 => "Locked",
  424 => "Failed Dependency",
  426 => "Upgrade Required",

  500 => "Internal Server Error",
  501 => "Not Implemented",
  502 => "Bad Gateway",
  503 => "Service Unavailable",
  504 => "Gateway Timeout",
  505 => "HTTP Version Not Supported",
  507 => "Insufficient Storage",
  510 => "Not Extended"
}
STATUS_MAPPING = 
Net::HTTPResponse::CODE_TO_OBJ

Instance Method Summary collapse

Methods included from HTTPAdapter

#adapt_request, #adapt_response, #specialize_request, #specialize_response, #transmit, verified_request, verified_response

Constructor Details

#initialize(&block) ⇒ NetHTTPAdapter

Returns a new instance of NetHTTPAdapter.



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# File 'lib/httpadapter/adapters/net_http.rb', line 101

def initialize(&block)
  @connection_config = block
end

Instance Method Details

#convert_request_from_a(request_ary) ⇒ Object 



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# File 'lib/httpadapter/adapters/net_http.rb', line 133

def convert_request_from_a(request_ary)
  method, uri, headers, body = request_ary
  method = method.to_s.upcase
  host_from_header = nil
  uri = Addressable::URI.parse(uri)
  request_class = METHOD_MAPPING[method]
  unless request_class
    raise ArgumentError, "Unknown HTTP method: #{method}"
  end
  request = request_class.new(uri.request_uri)
  headers.each do |header, value|
    request[header] = value
    if header.downcase == 'Content-Type'.downcase
      request.content_type = value
    elsif header.downcase == 'Host'.downcase
      host_from_header = value
    end
  end
  if host_from_header == nil && uri.host
    request['Host'] = uri.host
  end
  merged_body = ""
  body.each do |chunk|
    merged_body += chunk
  end
  if merged_body.length > 0
    request.body = merged_body
  elsif ['POST', 'PUT'].include?(method)
    request.content_length = 0
  end
  return request
end

#convert_request_to_a(request_obj) ⇒ Object 



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# File 'lib/httpadapter/adapters/net_http.rb', line 105

def convert_request_to_a(request_obj)
  unless request_obj.kind_of?(Net::HTTPRequest)
    raise TypeError, "Expected Net::HTTPRequest, got #{request_obj.class}."
  end
  method = request_obj.method.to_s.upcase
  host_from_header = nil
  scheme_from_header = nil
  headers = []
  request_obj.canonical_each do |header, value|
    if header.downcase == 'X-Forwarded-Proto'.downcase
      scheme_from_header = value
    elsif header.downcase == 'Host'.downcase
      host_from_header = value
    end
    headers << [header, value]
  end
  uri = Addressable::URI.parse(request_obj.path || "")
  uri.host ||= host_from_header
  if uri.host
    uri.scheme ||= scheme_from_header || 'http'
    uri.scheme = uri.normalized_scheme
    uri.authority = uri.normalized_authority
  end
  uri = uri.to_str
  body = request_obj.body || ""
  return [method, uri, headers, [body]]
end

#convert_response_from_a(response_ary) ⇒ Object 



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# File 'lib/httpadapter/adapters/net_http.rb', line 180

def convert_response_from_a(response_ary)
  status, headers, body = response_ary
  message = STATUS_MESSAGES[status.to_i]
  response_class = STATUS_MAPPING[status.to_s]
  unless message && response_class
    raise ArgumentError, "Unknown status code: #{status}"
  end
  status = status.to_i
  response = response_class.new('1.1', status.to_s, message)
  headers.each do |header, value|
    response.add_field(header, value)
  end
  merged_body = ""
  body.each do |chunk|
    merged_body += chunk
  end

  # Ugh
  response.instance_variable_set('@read', true)
  response.instance_variable_set('@body', merged_body)

  return response
end

#convert_response_to_a(response_obj) ⇒ Object 



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# File 'lib/httpadapter/adapters/net_http.rb', line 166

def convert_response_to_a(response_obj)
  unless response_obj.kind_of?(Net::HTTPResponse)
    raise TypeError,
      "Expected Net::HTTPResponse, got #{response_obj.class}."
  end
  status = response_obj.code.to_i
  headers = []
  response_obj.canonical_each do |header, value|
    headers << [header, value]
  end
  body = response_obj.body || ""
  return [status, headers, [body]]
end

#fetch_resource(request_ary, connection = nil) ⇒ Object 



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# File 'lib/httpadapter/adapters/net_http.rb', line 204

def fetch_resource(request_ary, connection=nil)
  method, uri, headers, body = request_ary
  uri = Addressable::URI.parse(uri)
  net_http_request = self.convert_request_from_a(
    [method, uri, headers, body]
  )
  net_http_response = nil
  unless connection
    http = Net::HTTP.new(uri.host, uri.inferred_port)
    if uri.normalized_scheme == 'https'
      require 'net/https'
      http.use_ssl = true
      if http.respond_to?(:enable_post_connection_check=)
        http.enable_post_connection_check = true
      end
      http.verify_mode = OpenSSL::SSL::VERIFY_PEER
      ca_file = File.expand_path(ENV['CA_FILE'] || '~/.cacert.pem')
      if File.exists?(ca_file)
        http.ca_file = ca_file
      end
      store = OpenSSL::X509::Store.new
      store.set_default_paths
      http.cert_store = store
      context = http.instance_variable_get('@ssl_context')
      if context && context.respond_to?(:tmp_dh_callback)
        # Fix for annoying warning
        context.tmp_dh_callback ||= lambda {}
      end
    end
    connection = HTTPAdapter::Connection.new(
      uri.host, uri.inferred_port, http,
      :open => [:start, [], nil],
      :close => [:finish, [], nil]
    )
  else
    http = nil
  end
  if @connection_config
    @connection_config.call(connection)
  end
  if connection.connection && !connection.connection.active?
    connection.connection.start
  end
  net_http_response = connection.connection.request(net_http_request)
  if http
    connection.close
  end
  return self.convert_response_to_a(net_http_response)
end