U .e2,@sdZddlmZddlZddlZddlZddlmZddlm Z m Z m Z m Z m Z mZddlmZddlmZdd lmZdd lmZd d lmZzdd lmZWnek rdZYnXeeZGddde ZGddde Z GdddeZ!ej"Z"ej#Z#ej$Z$ej%Z%ej&Z&dS)a[ This module provides a pool manager that uses Google App Engine's `URLFetch Service `_. Example usage:: from pip._vendor.urllib3 import PoolManager from pip._vendor.urllib3.contrib.appengine import AppEngineManager, is_appengine_sandbox if is_appengine_sandbox(): # AppEngineManager uses AppEngine's URLFetch API behind the scenes http = AppEngineManager() else: # PoolManager uses a socket-level API behind the scenes http = PoolManager() r = http.request('GET', 'https://google.com/') There are `limitations `_ to the URLFetch service and it may not be the best choice for your application. There are three options for using urllib3 on Google App Engine: 1. You can use :class:`AppEngineManager` with URLFetch. URLFetch is cost-effective in many circumstances as long as your usage is within the limitations. 2. 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