Class: HTTPAdapter::RackAdapter

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

Instance Method Summary collapse

Methods included from HTTPAdapter

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

Constructor Details

#initialize(options = {}) ⇒ RackAdapter

Returns a new instance of RackAdapter.



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# File 'lib/httpadapter/adapters/rack.rb', line 26

def initialize(options={})
  options = {
    :error_stream => $stderr
  }.merge(options)
  @error_stream = options[:error_stream]
end

Instance Method Details

#convert_request_from_a(request_ary) ⇒ Object 



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# File 'lib/httpadapter/adapters/rack.rb', line 51

def convert_request_from_a(request_ary)
  # These contortions are really obnoxious; lossiness is bad!
  method, uri, headers, body = request_ary
  env = {}
  method = method.to_s.upcase
  uri = Addressable::URI.parse(uri)
  body_io = StringIO.new
  body.each do |chunk|
    unless chunk.kind_of?(String)
      raise TypeError, "Expected String, got #{chunk.class}."
    end
    body_io.write(chunk)
  end
  body_io.rewind

  # PEP333 variables
  env['REQUEST_METHOD'] = method
  env['SERVER_NAME'] = uri.host || ''
  env['SERVER_PORT'] = uri.port || '80'
  env['SCRIPT_NAME'] = ''
  env['PATH_INFO'] = uri.path
  env['QUERY_STRING'] = uri.query || ''

  # Rack-specific variables
  env['rack.version'] = Rack::VERSION
  env['rack.input'] = body_io
  env['rack.errors'] = @error_stream
  env['rack.multithread'] = true # maybe?
  env['rack.multiprocess'] = true # maybe?
  env['rack.run_once'] = false
  env['rack.url_scheme'] = uri.scheme || 'http'

  headers.each do |header, value|
    case header.downcase
    when 'content-length'
      env['CONTENT_LENGTH'] = value
    when 'content-type'
      env['CONTENT_TYPE'] = value
    end
    env['HTTP_' + header.gsub(/\-/, "_").upcase] = value
  end
  request = Rack::Request.new(env)
  return request
end

#convert_request_to_a(request_obj) ⇒ Object 



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# File 'lib/httpadapter/adapters/rack.rb', line 33

def convert_request_to_a(request_obj)
  unless request_obj.kind_of?(Rack::Request)
    raise TypeError, "Expected Rack::Request, got #{request_obj.class}."
  end
  method = request_obj.request_method.to_s.upcase
  uri = Addressable::URI.parse(request_obj.url.to_s).normalize.to_s
  headers = []
  request_obj.env.each do |parameter, value|
    next if parameter !~ /^HTTP_/
    # Ugh, lossy canonicalization again
    header = (parameter.gsub(/^HTTP_/, '').split('_').map do |chunk|
      chunk.capitalize
    end).join('-')
    headers << [header, value]
  end
  return [method, uri, headers, request_obj.body]
end

#convert_response_from_a(request_ary) ⇒ Object 



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# File 'lib/httpadapter/adapters/rack.rb', line 103

def convert_response_from_a(request_ary)
  status, headers, body = request_ary
  status = status.to_i
  body.each do |chunk|
    # Purely for strict type-checking
    unless chunk.kind_of?(String)
      raise TypeError, "Expected String, got #{chunk.class}."
    end
  end
  response = Rack::Response.new(body, status, Hash[headers])
  return response
end

#convert_response_to_a(response_obj) ⇒ Object 



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# File 'lib/httpadapter/adapters/rack.rb', line 96

def convert_response_to_a(response_obj)
  unless response_obj.kind_of?(Rack::Response)
    raise TypeError, "Expected Rack::Response, got #{response_obj.class}."
  end
  return response_obj.finish
end

#fetch_resource(request_ary, connection = nil) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/httpadapter/adapters/rack.rb', line 116

def fetch_resource(request_ary, connection=nil)
  raise NotImplementedError,
    'No HTTP client implementation available to transmit a Rack::Request.'
end