text: # Copyright (c) 2016 Uber Technologies, Inc.
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  # THE SOFTWARE.
  
  from __future__ import (
      absolute_import, division, print_function, unicode_literals
  )
  
  from . import schemes
  from . import transport as t
  
  __all__ = ['Request']
  
  
  class Request(object):
      """A TChannel request.
  
      This is sent by callers and received by registered handlers.
  
      :ivar body:
          The payload of this request. The type of this attribute depends on the
          scheme being used (e.g., JSON, Thrift, etc.).
  
      :ivar headers:
          A dictionary of application headers. This should be a mapping of
          strings to strings.
  
      :ivar transport:
          Protocol-level transport headers. These are used for routing over
          Hyperbahn.
  
          The most useful piece of information here is probably
          ``request.transport.caller_name``, which is the identity of the
          application that created this request.
  
      :ivar service:
          Name of the service being called. Inside request handlers, this is
          usually the name of "this" service itself. However, for services that
          simply forward requests to other services, this is the name of the
          target service.
  
      :ivar timeout:
          Amount of time (in seconds) within which this request is expected to
          finish.
      """
  
      # TODO move over other props from tchannel.tornado.request
  
      __slots__ = (
          'body',
          'headers',
          'service',
          'transport',
          'endpoint',
          'timeout',
      )
  
      def __init__(
          self,
          body=None,
          headers=None,
          transport=None,
          endpoint=None,
          service=None,
          timeout=None,
      ):
          self.body = body
          self.headers = headers
          self.transport = transport
          self.endpoint = endpoint
          self.service = service
          self.timeout = timeout
  
  
  class TransportHeaders(object):
      """Request Transport Headers"""
  
      # TODO implement __repr__
      # TODO retry_flags should be woke up past a string
  
      __slots__ = (
          'caller_name',
          'claim_at_start',
          'claim_at_finish',
          'failure_domain',
          'retry_flags',
          'routing_delegate',
          'scheme',
          'speculative_exe',
          'shard_key',
      )
  
      def __init__(self,
                   caller_name=None,
                   claim_at_start=None,
                   claim_at_finish=None,
                   failure_domain=None,
                   retry_flags=None,
                   scheme=None,
                   speculative_exe=None,
                   shard_key=None,
                   routing_delegate=None):
  
          if scheme is None:
              scheme = schemes.RAW
  
          self.caller_name = caller_name
          self.claim_at_start = claim_at_start
          self.claim_at_finish = claim_at_finish
          self.failure_domain = failure_domain
          self.retry_flags = retry_flags
          self.routing_delegate = routing_delegate
          self.scheme = scheme
          self.speculative_exe = speculative_exe
          self.shard_key = shard_key
  
      @classmethod
      def from_dict(cls, data):
          return cls(
              caller_name=data.get(t.CALLER_NAME),
              claim_at_finish=data.get(t.CLAIM_AT_FINISH),
              claim_at_start=data.get(t.CLAIM_AT_START),
              failure_domain=data.get(t.FAILURE_DOMAIN),
              retry_flags=data.get(t.RETRY_FLAGS),
              routing_delegate=data.get(t.ROUTING_DELEGATE),
              scheme=data.get(t.SCHEME),
              shard_key=data.get(t.SHARD_KEY),
              speculative_exe=data.get(t.SPECULATIVE_EXE),
          )
  
      def to_dict(self):
          m = {}
  
          if self.caller_name is not None:
              m[t.CALLER_NAME] = self.caller_name
  
          if self.claim_at_start is not None:
              m[t.CLAIM_AT_START] = self.claim_at_start
  
          if self.claim_at_finish is not None:
              m[t.CLAIM_AT_FINISH] = self.claim_at_finish
  
          if self.failure_domain is not None:
              m[t.FAILURE_DOMAIN] = self.failure_domain
  
          if self.retry_flags is not None:
              m[t.RETRY_FLAGS] = self.retry_flags
  
          if self.routing_delegate is not None:
              m[t.ROUTING_DELEGATE] = self.routing_delegate
  
          if self.scheme is not None:
              m[t.SCHEME] = self.scheme
  
          if self.shard_key is not None:
              m[t.SHARD_KEY] = self.shard_key
  
          if self.speculative_exe is not None:
              m[t.SPECULATIVE_EXE] = self.speculative_exe
  
          return m
  