text: # coding: utf-8
  
  """
  Copyright 2017 Square, Inc.
  
      Licensed under the Apache License, Version 2.0 (the "License");
      you may not use this file except in compliance with the License.
      You may obtain a copy of the License at
  
          http://www.apache.org/licenses/LICENSE-2.0
  
      Unless required by applicable law or agreed to in writing, software
      distributed under the License is distributed on an "AS IS" BASIS,
      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      See the License for the specific language governing permissions and
      limitations under the License.
  """
  
  from __future__ import absolute_import
  
  import sys
  import io
  import json
  import ssl
  import certifi
  import logging
  import re
  
  # python 2 and python 3 compatibility library
  from six import iteritems
  
  from .configuration import Configuration
  
  try:
      import urllib3
  except ImportError:
      raise ImportError('Swagger python client requires urllib3.')
  
  try:
      # for python3
      from urllib.parse import urlencode
      from urllib.parse import urlparse
  except ImportError:
      # for python2
      from urllib import urlencode
      import urlparse
  
  logger = logging.getLogger(__name__)
  
  
  class RESTResponse(io.IOBase):
  
      def __init__(self, resp, method):
          self.urllib3_response = resp
          self.status = resp.status
          self.reason = resp.reason
          # In Square Connect v2 API,
          # GET ListCustomers/ListLocations/ListTransaction/ListRefunds
          # may have large response thus calling stream() for chunked-encoding
          if method in ['GET', 'HEAD']:
              self.data = ''
              for chunk in resp.stream():
                  # In the python 3, the response.data is bytes.
                  # we need to decode it to string.
                  if sys.version_info > (3,):
                      self.data += chunk.decode('utf8')
                  else:
                      self.data += str(chunk)
              # as using preload_content=False, we should call release_conn()
              # to release the http connection back to the connection pool so that
              # it can be re-used
              resp.release_conn()
          else:
              if sys.version_info > (3,):
                  self.data = resp.data.decode('utf8')
              else:
                  self.data = resp.data
  
      def getheaders(self):
          """
          Returns a dictionary of the response headers.
          """
          return self.urllib3_response.getheaders()
  
      def getheader(self, name, default=None):
          """
          Returns a given response header.
          """
          return self.urllib3_response.getheader(name, default)
  
      def getbatch_token(self):
          link_header = self.getheader('Link')
          if link_header != None:
              match = re.match("^<([^>]+)>;rel='next'$", link_header)
              if match != None:
                  next_url = match.group(1)
                  parsed_url = urlparse.urlparse(next_url)
                  parameters = urlparse.parse_qs(parsed_url.query)
                  if parameters.has_key('batch_token'):
                      return parameters['batch_token'][0]
          return None
  
  
  class RESTClientObject(object):
  
      def __init__(self, pools_size=4):
          # urllib3.PoolManager will pass all kw parameters to connectionpool
          # https://github.com/shazow/urllib3/blob/f9409436f83aeb79fbaf090181cd81b784f1b8ce/urllib3/poolmanager.py#L75
          # https://github.com/shazow/urllib3/blob/f9409436f83aeb79fbaf090181cd81b784f1b8ce/urllib3/connectionpool.py#L680
          # ca_certs vs cert_file vs key_file
          # http://stackoverflow.com/a/23957365/2985775
  
          # cert_reqs
          if Configuration().verify_ssl:
              cert_reqs = ssl.CERT_REQUIRED
          else:
              cert_reqs = ssl.CERT_NONE
  
          # ca_certs
          if Configuration().ssl_ca_cert:
              ca_certs = Configuration().ssl_ca_cert
          else:
              # if not set certificate file, use Mozilla's root certificates.
              ca_certs = certifi.where()
  
          # cert_file
          cert_file = Configuration().cert_file
  
          # key file
          key_file = Configuration().key_file
  
          # https pool manager
          self.pool_manager = urllib3.PoolManager(
              num_pools=pools_size,
              cert_reqs=cert_reqs,
              ca_certs=ca_certs,
              cert_file=cert_file,
              key_file=key_file
          )
  
      def request(self, method, url, query_params=None, headers=None,
                  body=None, post_params=None):
          """
          :param method: http request method
          :param url: http request url
          :param query_params: query parameters in the url
          :param headers: http request headers
          :param body: request json body, for `application/json`
          :param post_params: request post parameters,
                              `application/x-www-form-urlencode`
                              and `multipart/form-data`
          """
          method = method.upper()
          assert method in ['GET', 'HEAD', 'DELETE', 'POST', 'PUT', 'PATCH', 'OPTIONS']
  
          if post_params and body:
              raise ValueError(
                  "body parameter cannot be used with post_params parameter."
              )
  
          post_params = post_params or {}
          headers = headers or {}
  
          if 'Content-Type' not in headers:
              headers['Content-Type'] = 'application/json'
  
          try:
              # For `POST`, `PUT`, `PATCH`, `OPTIONS`, `DELETE`
              if method in ['POST', 'PUT', 'PATCH', 'OPTIONS', 'DELETE']:
                  if query_params:
                      url += '?' + urlencode(query_params)
                  if headers['Content-Type'] == 'application/json':
                      request_body = None
                      if body is not None:
                          request_body = json.dumps(body)
                      r = self.pool_manager.request(method, url,
                                                    body=request_body,
                                                    headers=headers)
                  if headers['Content-Type'] == 'application/x-www-form-urlencoded':
                      r = self.pool_manager.request(method, url,
                                                    fields=post_params,
                                                    encode_multipart=False,
                                                    headers=headers)
                  if headers['Content-Type'] == 'multipart/form-data':
                      # must del headers['Content-Type'], or the correct Content-Type
                      # which generated by urllib3 will be overwritten.
                      del headers['Content-Type']
                      r = self.pool_manager.request(method, url,
                                                    fields=post_params,
                                                    encode_multipart=True,
                                                    headers=headers)
              # For `GET`, `HEAD`
              else:
                  r = self.pool_manager.request(method, url,
                                                fields=query_params,
                                                headers=headers,
                                                preload_content=False)
  
          except urllib3.exceptions.SSLError as e:
              msg = "{0}\n{1}".format(type(e).__name__, str(e))
              raise ApiException(status=0, reason=msg)
  
          r = RESTResponse(r, method)
  
          # log response body
          logger.debug("response body: %s" % r.data)
  
          if r.status not in range(200, 206):
              raise ApiException(http_resp=r)
  
          return r
  
      def GET(self, url, headers=None, query_params=None):
          return self.request("GET", url,
                              headers=headers,
                              query_params=query_params)
  
      def HEAD(self, url, headers=None, query_params=None):
          return self.request("HEAD", url,
                              headers=headers,
                              query_params=query_params)
  
      def OPTIONS(self, url, headers=None, query_params=None, post_params=None, body=None):
          return self.request("OPTIONS", url,
                              headers=headers,
                              query_params=query_params,
                              post_params=post_params,
                              body=body)
  
      def DELETE(self, url, headers=None, query_params=None, body=None):
          return self.request("DELETE", url,
                              headers=headers,
                              query_params=query_params,
                              body=body)
  
      def POST(self, url, headers=None, query_params=None, post_params=None, body=None):
          return self.request("POST", url,
                              headers=headers,
                              query_params=query_params,
                              post_params=post_params,
                              body=body)
  
      def PUT(self, url, headers=None, query_params=None, post_params=None, body=None):
          return self.request("PUT", url,
                              headers=headers,
                              query_params=query_params,
                              post_params=post_params,
                              body=body)
  
      def PATCH(self, url, headers=None, query_params=None, post_params=None, body=None):
          return self.request("PATCH", url,
                              headers=headers,
                              query_params=query_params,
                              post_params=post_params,
                              body=body)
  
  
  class ApiException(Exception):
  
      def __init__(self, status=None, reason=None, http_resp=None):
          if http_resp:
              self.status = http_resp.status
              self.reason = http_resp.reason
              self.body = http_resp.data
              self.headers = http_resp.getheaders()
          else:
              self.status = status
              self.reason = reason
              self.body = None
              self.headers = None
  
      def __str__(self):
          """
          Custom error messages for exception
          """
          error_message = "({0})\n"\
                          "Reason: {1}\n".format(self.status, self.reason)
          if self.headers:
              error_message += "HTTP response headers: {0}\n".format(self.headers)
  
          if self.body:
              error_message += "HTTP response body: {0}\n".format(self.body)
  
          return error_message
  