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import zlib
import sys
import socket
import os
import types
import json
import logging
try:
import http.client as httplib
except ImportError:
import httplib
_logger = logging.getLogger(__name__)
# Python 3 compatibility helpers.
PY2 = sys.version_info[0] == 2
PY3 = sys.version_info[0] == 3
if PY3:
def b(s):
return s.encode('latin-1')
else:
def b(s):
return s
# Helpers for json encoding and decoding.
def json_encode(obj, **kwargs):
_kwargs = {}
if type(b'') is type(''):
_kwargs['encoding'] = 'latin-1'
def _encode(o):
if isinstance(o, bytes):
return o.decode('latin-1')
elif isinstance(o, types.GeneratorType):
return list(o)
elif hasattr(o, '__iter__'):
return list(iter(o))
raise TypeError(repr(o) + ' is not JSON serializable')
_kwargs['default'] = _encode
_kwargs['separators'] = (',', ':')
_kwargs.update(kwargs)
return json.dumps(obj, **_kwargs)
def json_decode(s, **kwargs):
return json.loads(s, **kwargs)
# Platform plugin interface.
class Interface(object):
class NetworkInterfaceException(Exception): pass
class DiscardDataForRequest(NetworkInterfaceException): pass
class RetryDataForRequest(NetworkInterfaceException): pass
class ServerIsUnavailable(RetryDataForRequest): pass
USER_AGENT = 'ModWsgi-PythonPlugin/%s (Python %s %s)' % (
'1.0.0', sys.version.split()[0], sys.platform)
HOST = 'platform-api.newrelic.com'
URL = '/platform/v1/metrics'
def __init__(self, license_key):
self.license_key = license_key
def send_request(self, payload=()):
headers = {}
config = {}
license_key = self.license_key
if not self.license_key:
license_key = 'INVALID LICENSE KEY'
headers['User-Agent'] = self.USER_AGENT
headers['Content-Encoding'] = 'identity'
headers['X-License-Key'] = license_key
try:
data = json_encode(payload)
except Exception as exc:
_logger.exception('Error encoding data for JSON payload '
'with payload of %r.', payload)
raise Interface.DiscardDataForRequest(str(exc))
if len(data) > 64*1024:
headers['Content-Encoding'] = 'deflate'
level = (len(data) < 2000000) and 1 or 9
data = zlib.compress(b(data), level)
try:
connection = httplib.HTTPSConnection(self.HOST, timeout=30.0)
connection.request('POST', self.URL, data, headers)
response = connection.getresponse()
content = response.read()
except httplib.HTTPException as exc:
raise Interface.RetryDataForRequest(str(exc))
finally:
connection.close()
if response.status != 200:
_logger.debug('Received a non 200 HTTP response from the data '
'collector where headers=%r, status=%r and content=%r.',
headers, response.status, content)
if response.status == 400:
if headers['Content-Encoding'] == 'deflate':
data = zlib.decompress(data)
_logger.error('Data collector is indicating that a bad '
'request has been submitted for headers of %r and '
'payload of %r with response of %r.', headers, data,
content)
raise Interface.DiscardDataForRequest()
elif response.status == 403:
_logger.error('Data collector is indicating that the license '
'key %r is not valid.', license_key)
raise Interface.DiscardDataForRequest()
elif response.status == 413:
_logger.warning('Data collector is indicating that a request '
'was received where the request content size was over '
'the maximum allowed size limit. The length of the '
'request content was %d.', len(data))
raise Interface.DiscardDataForRequest()
elif response.status in (503, 504):
_logger.warning('Data collector is unavailable.')
raise Interface.ServerIsUnavailable()
elif response.status != 200:
_logger.warning('An unexpected HTTP response was received '
'from the data collector of %r. The payload for '
'the request was %r.', respnse.status, payload)
raise Interface.DiscardDataForRequest()
try:
if PY3:
content = content.decode('UTF-8')
result = json_decode(content)
except Exception as exc:
_logger.exception('Error decoding data for JSON payload '
'with payload of %r.', content)
raise Interface.DiscardDataForRequest(str(exc))
if 'status' in result:
return result['status']
error_message = result['error']
raise Interface.DiscardDataForRequest(error_message)
def send_metrics(self, name, guid, version, duration, metrics):
agent = {}
agent['host'] = socket.gethostname()
agent['pid'] = os.getpid()
agent['version'] = version or '0.0.0.'
component = {}
component['name'] = name
component['guid'] = guid
component['duration'] = duration
component['metrics'] = metrics
payload = {}
payload['agent'] = agent
payload['components'] = [component]
return self.send_request(payload)
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