lib/py/src/transport/THttpClient.py

# Copyright (c) 2006- Facebook
# Distributed under the Thrift Software License
#
# See accompanying file LICENSE or visit the Thrift site at:
# http://developers.facebook.com/thrift/

from TTransport import *
from cStringIO import StringIO

import urlparse
import httplib
import warnings

class THttpClient(TTransportBase):

  """Http implementation of TTransport base."""

  def __init__(self, uri_or_host, port=None, path=None):
    """THttpClient supports two different types constructor parameters.

    THttpClient(host, port, path) - deprecated
    THttpClient(uri)

    Only the second supports https."""

    if port is not None:
      warnings.warn("Please use the THttpClient('http://host:port/path') syntax", DeprecationWarning, stacklevel=2)
      self.host = uri_or_host
      self.port = port
      assert path
      self.path = path
      self.scheme = 'http'
    else:
      parsed = urlparse.urlparse(uri_or_host)
      self.scheme = parsed.scheme
      assert self.scheme in ('http', 'https')
      if self.scheme == 'http':
        self.port = parsed.port or httplib.HTTP_PORT
      elif self.scheme == 'https':
        self.port = parsed.port or httplib.HTTPS_PORT
      self.host = parsed.hostname
      self.path = parsed.path
    self.__wbuf = StringIO()
    self.__http = None

  def open(self):
    if self.scheme == 'http':
      self.__http = httplib.HTTP(self.host, self.port)
    else:
      self.__http = httplib.HTTPS(self.host, self.port)

  def close(self):
    self.__http.close()
    self.__http = None

  def isOpen(self):
    return self.__http != None

  def read(self, sz):
    return self.__http.file.read(sz)

  def write(self, buf):
    self.__wbuf.write(buf)

  def flush(self):
    if self.isOpen():
      self.close()
    self.open();

    # Pull data out of buffer
    data = self.__wbuf.getvalue()
    self.__wbuf = StringIO()

    # HTTP request
    self.__http.putrequest('POST', self.path)

    # Write headers
    self.__http.putheader('Host', self.host)
    self.__http.putheader('Content-Type', 'application/x-thrift')
    self.__http.putheader('Content-Length', str(len(data)))
    self.__http.endheaders()

    # Write payload
    self.__http.send(data)

    # Get reply to flush the request
    self.code, self.message, self.headers = self.__http.getreply()