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emitter.py
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emitter.py
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import zlib
import sys
from pprint import pformat as pp
from util import json, md5, get_os
from config import get_ssl_certificate
def get_http_library(proxy_settings, use_forwarder):
#There is a bug in the https proxy connection in urllib2 on python < 2.6.3
if use_forwarder:
# We are using the forwarder, so it's local trafic. We don't use the proxy
import urllib2
elif proxy_settings is None or int(sys.version_info[1]) >= 7\
or (int(sys.version_info[1]) == 6 and int(sys.version_info[2]) >= 3):
# Python version >= 2.6.3
import urllib2
else:
# Python version < 2.6.3
import urllib2proxy as urllib2
return urllib2
def format_body(message):
payload = json.dumps(message)
return zlib.compress(payload)
def post_headers(agentConfig, payload):
return {
'User-Agent': 'Datadog Agent/%s' % agentConfig['version'],
'Content-Type': 'application/json',
'Content-Encoding': 'deflate',
'Accept': 'text/html, */*',
'Content-MD5': md5(payload).hexdigest()
}
def http_emitter(message, logger, agentConfig):
logger.debug('http_emitter: start')
# Post back the data
postBackData = format_body(message)
logger.debug('http_emitter: attempting postback to ' + agentConfig['dd_url'])
# Build the request handler
apiKey = message.get('apiKey', None)
if not apiKey:
raise Exception("The http emitter requires an api key")
url = "%s/intake?api_key=%s" % (agentConfig['dd_url'], apiKey)
headers = post_headers(agentConfig, postBackData)
proxy_settings = agentConfig.get('proxy_settings', None)
urllib2 = get_http_library(proxy_settings, agentConfig['use_forwarder'])
try:
request = urllib2.Request(url, postBackData, headers)
# Do the request, logger any errors
opener = get_opener(logger, proxy_settings, agentConfig['use_forwarder'], urllib2)
if opener is not None:
urllib2.install_opener(opener)
response = urllib2.urlopen(request)
try:
logger.debug('http_emitter: postback response: ' + str(response.read()))
finally:
response.close()
except urllib2.HTTPError, e:
if e.code == 202:
logger.debug("http payload accepted")
else:
raise
def get_opener(logger, proxy_settings, use_forwarder, urllib2):
if use_forwarder:
# We are using the forwarder, so it's local trafic. We don't use the proxy
return None
if proxy_settings is None:
# urllib2 will figure out how to connect automatically
return None
proxy_url = '%s:%s' % (proxy_settings['host'], proxy_settings['port'])
if proxy_settings.get('user') is not None:
proxy_auth = proxy_settings['user']
if proxy_settings.get('password') is not None:
proxy_auth = '%s:%s' % (proxy_auth, proxy_settings['password'])
proxy_url = '%s@%s' % (proxy_auth, proxy_url)
proxy = {'https': proxy_url}
logger.info("Using proxy settings %s" % proxy)
proxy_handler = urllib2.ProxyHandler(proxy)
opener = urllib2.build_opener(proxy_handler)
return opener