text: # Tweepy
  # Copyright 2009-2010 Joshua Roesslein
  # See LICENSE for details.
  
  import httplib
  import urllib
  import time
  import re
  
  from tweepy.error import TweepError
  from tweepy.utils import convert_to_utf8_str
  from tweepy.models import Model
  
  re_path_template = re.compile('{\w+}')
  
  
  def bind_api(**config):
  
      class APIMethod(object):
  
          path = config['path']
          payload_type = config.get('payload_type', None)
          payload_list = config.get('payload_list', False)
          allowed_param = config.get('allowed_param', [])
          method = config.get('method', 'GET')
          require_auth = config.get('require_auth', False)
          search_api = config.get('search_api', False)
          use_cache = config.get('use_cache', True)
  
          def __init__(self, api, args, kargs):
              # If authentication is required and no credentials
              # are provided, throw an error.
              if self.require_auth and not api.auth:
                  raise TweepError('Authentication required!')
  
              self.api = api
              self.post_data = kargs.pop('post_data', None)
              self.retry_count = kargs.pop('retry_count', api.retry_count)
              self.retry_delay = kargs.pop('retry_delay', api.retry_delay)
              self.retry_errors = kargs.pop('retry_errors', api.retry_errors)
              self.headers = kargs.pop('headers', {})
              self.build_parameters(args, kargs)
  
              # Pick correct URL root to use
              if self.search_api:
                  self.api_root = api.search_root
              else:
                  self.api_root = api.api_root
  
              # Perform any path variable substitution
              self.build_path()
  
              if api.secure:
                  self.scheme = 'https://'
              else:
                  self.scheme = 'http://'
  
              if self.search_api:
                  self.host = api.search_host
              else:
                  self.host = api.host
  
              # Manually set Host header to fix an issue in python 2.5
              # or older where Host is set including the 443 port.
              # This causes Twitter to issue 301 redirect.
              # See Issue https://github.com/tweepy/tweepy/issues/12
              self.headers['Host'] = self.host
  
          def build_parameters(self, args, kargs):
              self.parameters = {}
              for idx, arg in enumerate(args):
                  if arg is None:
                      continue
  
                  try:
                      self.parameters[self.allowed_param[idx]] = convert_to_utf8_str(arg)
                  except IndexError:
                      raise TweepError('Too many parameters supplied!')
  
              for k, arg in kargs.items():
                  if arg is None:
                      continue
                  if k in self.parameters:
                      raise TweepError('Multiple values for parameter %s supplied!' % k)
  
                  self.parameters[k] = convert_to_utf8_str(arg)
  
          def build_path(self):
              for variable in re_path_template.findall(self.path):
                  name = variable.strip('{}')
  
                  if name == 'user' and 'user' not in self.parameters and self.api.auth:
                      # No 'user' parameter provided, fetch it from Auth instead.
                      value = self.api.auth.get_username()
                  else:
                      try:
                          value = urllib.quote(self.parameters[name])
                      except KeyError:
                          raise TweepError('No parameter value found for path variable: %s' % name)
                      del self.parameters[name]
  
                  self.path = self.path.replace(variable, value)
  
          def execute(self):
              # Build the request URL
              url = self.api_root + self.path
              if len(self.parameters):
                  url = '%s?%s' % (url, urllib.urlencode(self.parameters))
  
              # Query the cache if one is available
              # and this request uses a GET method.
              if self.use_cache and self.api.cache and self.method == 'GET':
                  cache_result = self.api.cache.get(url)
                  # if cache result found and not expired, return it
                  if cache_result:
                      # must restore api reference
                      if isinstance(cache_result, list):
                          for result in cache_result:
                              if isinstance(result, Model):
                                  result._api = self.api
                      else:
                          if isinstance(cache_result, Model):
                              cache_result._api = self.api
                      return cache_result
  
              # Continue attempting request until successful
              # or maximum number of retries is reached.
              retries_performed = 0
              while retries_performed < self.retry_count + 1:
                  # Open connection
                  # FIXME: add timeout
                  if self.api.secure:
                      conn = httplib.HTTPSConnection(self.host)
                  else:
                      conn = httplib.HTTPConnection(self.host)
  
                  if not self.post_data:
                      self.headers['Content-Length'] = 0
  
                  # Apply authentication
                  if self.api.auth:
                      self.api.auth.apply_auth(
                              self.scheme + self.host + url,
                              self.method, self.headers, self.parameters
                      )
  
                  # Execute request
                  try:
                      conn.request(self.method, url, headers=self.headers, body=self.post_data)
                      resp = conn.getresponse()
                  except Exception, e:
                      raise TweepError('Failed to send request: %s' % e)
  
                  # Exit request loop if non-retry error code
                  if self.retry_errors:
                      if resp.status not in self.retry_errors: break
                  else:
                      if resp.status == 200: break
  
                  # Sleep before retrying request again
                  time.sleep(self.retry_delay)
                  retries_performed += 1
  
              # If an error was returned, throw an exception
              self.api.last_response = resp
              if resp.status != 200:
                  try:
                      error_msg = self.api.parser.parse_error(resp.read())
                  except Exception:
                      error_msg = "Twitter error response: status code = %s" % resp.status
                  raise TweepError(error_msg, resp)
  
              # Parse the response payload
              result = self.api.parser.parse(self, resp.read())
  
              conn.close()
  
              # Store result into cache if one is available.
              if self.use_cache and self.api.cache and self.method == 'GET' and result:
                  self.api.cache.store(url, result)
  
              return result
  
  
      def _call(api, *args, **kargs):
  
          method = APIMethod(api, args, kargs)
          return method.execute()
  
  
      # Set pagination mode
      if 'cursor' in APIMethod.allowed_param:
          _call.pagination_mode = 'cursor'
      elif 'page' in APIMethod.allowed_param:
          _call.pagination_mode = 'page'
  
      return _call
  
  