ó ùR‹_c@s–dZddlZddlZddlZddlZddlZddlmZddlm Z ddl m Z ddl m Z ddl mZejeƒZeje jdƒZesÔeje jdƒZnd jeƒZd jeje jd ƒƒZd Zd Ziee6ZyeejddƒƒZWne k rOdZnXedd„Z!ee"dd„Z#d„Z$dd„Z%dd„Z&dS(s‘Provides helper methods for talking to the Compute Engine metadata server. See https://cloud.google.com/compute/docs/metadata for more details. iÿÿÿÿN(t http_client(tparse(t_helpers(tenvironment_vars(t exceptionssmetadata.google.internalshttp://{}/computeMetadata/v1/s http://{}s169.254.169.254smetadata-flavortGoogletGCE_METADATA_TIMEOUTic Cs­d}x ||kr¨yS|dtdddtd|ƒ}|jjtƒ}|jtjkof|tkSWq t j k r¤}t j d|d||ƒ|d7}q Xq Wt S( s½Checks to see if the metadata server is available. Args: request (google.auth.transport.Request): A callable used to make HTTP requests. timeout (int): How long to wait for the metadata server to respond. retry_count (int): How many times to attempt connecting to metadata server using above timeout. Returns: bool: True if the metadata server is reachable, False otherwise. iturltmethodtGETtheadersttimeoutsICompute Engine Metadata server unavailable onattempt %s of %s. Reason: %si(t_METADATA_IP_ROOTt_METADATA_HEADERSR tgett_METADATA_FLAVOR_HEADERtstatusRtOKt_METADATA_FLAVOR_VALUERtTransportErrort_LOGGERtwarningtFalse(trequestR t retry_counttretriestresponsetmetadata_flavorte((s]/var/www/syncserver/local/lib/python2.7/site-packages/google/auth/compute_engine/_metadata.pytping?s& icCs†tj||ƒ}i}|r+d|ds<        0L