appengine.py 文件源码

def __init__(self, headers=None, retries=None, validate_certificate=True):
        if not urlfetch:
            raise AppEnginePlatformError(
                "URLFetch is not available in this environment.")

        if is_prod_appengine_mvms():
            raise AppEnginePlatformError(
                "Use normal urllib3.PoolManager instead of AppEngineManager"
                "on Managed VMs, as using URLFetch is not necessary in "
                "this environment.")

        warnings.warn(
            "urllib3 is using URLFetch on Google App Engine sandbox instead "
            "of sockets. To use sockets directly instead of URLFetch see "
            "https://urllib3.readthedocs.io/en/latest/contrib.html.",
            AppEnginePlatformWarning)

        RequestMethods.__init__(self, headers)
        self.validate_certificate = validate_certificate

        self.retries = retries or Retry.DEFAULT