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runtime_mock.py
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286 lines (228 loc) · 7.86 KB
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# pylint: disable=missing-docstring, global-statement, unused-argument, broad-except
from __future__ import print_function
import sys
import os
import random
import uuid
import time
import datetime
import subprocess
import json
import traceback
import base64
import signal
try:
# for python 3
from http.client import HTTPConnection
except ImportError:
# for python 2
from httplib import HTTPConnection
ORIG_STDOUT = sys.stdout
ORIG_STDERR = sys.stderr
LOGS = ''
LOG_TAIL = False
STAY_OPEN = os.environ.get('DOCKER_LAMBDA_STAY_OPEN', '')
HANDLER = sys.argv[1] if len(sys.argv) > 1 else os.environ.get('AWS_LAMBDA_FUNCTION_HANDLER', \
os.environ.get('_HANDLER', 'lambda_function.lambda_handler'))
EVENT_BODY = sys.argv[2] if len(sys.argv) > 2 else os.environ.get('AWS_LAMBDA_EVENT_BODY', \
(sys.stdin.read() if os.environ.get('DOCKER_LAMBDA_USE_STDIN', False) else '{}'))
FUNCTION_NAME = os.environ.get('AWS_LAMBDA_FUNCTION_NAME', 'test')
FUNCTION_VERSION = os.environ.get('AWS_LAMBDA_FUNCTION_VERSION', '$LATEST')
MEM_SIZE = os.environ.get('AWS_LAMBDA_FUNCTION_MEMORY_SIZE', '1536')
DEADLINE_MS = int(time.time() * 1000) + int(os.environ.get('AWS_LAMBDA_FUNCTION_TIMEOUT', '300'))
REGION = os.environ.get('AWS_REGION', os.environ.get('AWS_DEFAULT_REGION', 'us-east-1'))
ACCOUNT_ID = os.environ.get('AWS_ACCOUNT_ID', random.randint(100000000000, 999999999999))
ACCESS_KEY_ID = os.environ.get('AWS_ACCESS_KEY_ID', None)
SECRET_ACCESS_KEY = os.environ.get('AWS_SECRET_ACCESS_KEY', None)
SESSION_TOKEN = os.environ.get('AWS_SESSION_TOKEN', None)
INVOKEID = str(uuid.uuid4())
INVOKE_MODE = 'event' # Either 'http' or 'event'
SUPPRESS_INIT = True # Forces calling _get_handlers_delayed()
THROTTLED = False
DATA_SOCK = -1
CONTEXT_OBJS = {
'clientcontext': None,
'cognitoidentityid': None,
'cognitopoolid': None,
}
CREDENTIALS = {
'key': ACCESS_KEY_ID,
'secret': SECRET_ACCESS_KEY,
'session': SESSION_TOKEN
}
INVOKED_FUNCTION_ARN = os.environ.get('AWS_LAMBDA_FUNCTION_INVOKED_ARN', \
'arn:aws:lambda:%s:%s:function:%s' % (REGION, ACCOUNT_ID, FUNCTION_NAME))
XRAY_TRACE_ID = os.environ.get('_X_AMZN_TRACE_ID', None)
XRAY_PARENT_ID = None
XRAY_SAMPLED = None
TRACE_ID = None
INVOKED = False
ERRORED = False
INIT_END_SENT = False
INIT_END = time.time()
RECEIVED_INVOKE_AT = time.time()
TODAY = datetime.date.today()
# export needed stuff
os.environ['AWS_LAMBDA_LOG_GROUP_NAME'] = '/aws/lambda/%s' % FUNCTION_NAME
os.environ['AWS_LAMBDA_LOG_STREAM_NAME'] = "%s/%s/%s/[%s]%s" % (
TODAY.year,
TODAY.month,
TODAY.day,
FUNCTION_VERSION,
'%016x' % random.randrange(16**16)
)
os.environ["AWS_LAMBDA_FUNCTION_NAME"] = FUNCTION_NAME
os.environ['AWS_LAMBDA_FUNCTION_MEMORY_SIZE'] = MEM_SIZE
os.environ['AWS_LAMBDA_FUNCTION_VERSION'] = FUNCTION_VERSION
os.environ['AWS_REGION'] = REGION
os.environ['AWS_DEFAULT_REGION'] = REGION
os.environ['_HANDLER'] = HANDLER
MOCKSERVER_ENV = os.environ.copy()
MOCKSERVER_ENV['DOCKER_LAMBDA_NO_BOOTSTRAP'] = '1'
MOCKSERVER_ENV['DOCKER_LAMBDA_USE_STDIN'] = '1'
MOCKSERVER_PROCESS = subprocess.Popen(
'/var/runtime/mockserver', stdin=subprocess.PIPE, env=MOCKSERVER_ENV)
MOCKSERVER_PROCESS.stdin.write(EVENT_BODY.encode())
MOCKSERVER_PROCESS.stdin.close()
MOCKSERVER_CONN = HTTPConnection("127.0.0.1", 9001)
def sighup_handler(signum, frame):
eprint("SIGHUP received, exiting runtime...")
sys.exit(2)
signal.signal(signal.SIGINT, lambda x, y: sys.exit(0))
signal.signal(signal.SIGTERM, lambda x, y: sys.exit(0))
signal.signal(signal.SIGHUP, sighup_handler)
def eprint(*args, **kwargs):
print(*args, file=ORIG_STDERR, **kwargs)
def report_user_init_start():
return
def report_user_init_end():
global INIT_END
INIT_END = time.time()
def report_user_invoke_start():
return
def report_user_invoke_end():
return
def receive_start():
global MOCKSERVER_CONN
ping_timeout = time.time() + 1
while True:
try:
MOCKSERVER_CONN = HTTPConnection("127.0.0.1", 9001)
MOCKSERVER_CONN.request("GET", "/2018-06-01/ping")
resp = MOCKSERVER_CONN.getresponse()
if resp.status != 200:
raise Exception("Mock server returned %d" % resp.status)
resp.read()
break
except Exception:
if time.time() > ping_timeout:
raise
else:
time.sleep(.005)
continue
return (
INVOKEID,
INVOKE_MODE,
HANDLER,
SUPPRESS_INIT,
THROTTLED,
CREDENTIALS
)
def report_running(invokeid):
return
def receive_invoke():
global INVOKED
global INVOKEID
global DEADLINE_MS
global INVOKED_FUNCTION_ARN
global XRAY_TRACE_ID
global EVENT_BODY
global CONTEXT_OBJS
global LOGS
global LOG_TAIL
global RECEIVED_INVOKE_AT
ORIG_STDOUT.flush()
ORIG_STDERR.flush()
if not INVOKED:
RECEIVED_INVOKE_AT = time.time()
INVOKED = True
else:
LOGS = ""
try:
MOCKSERVER_CONN.request("GET", "/2018-06-01/runtime/invocation/next")
resp = MOCKSERVER_CONN.getresponse()
if resp.status != 200:
raise Exception("/invocation/next return status %d" % resp.status)
except Exception:
sys.exit(2 if STAY_OPEN else (1 if ERRORED else 0))
return ()
INVOKEID = resp.getheader('Lambda-Runtime-Aws-Request-Id')
DEADLINE_MS = int(resp.getheader('Lambda-Runtime-Deadline-Ms'))
INVOKED_FUNCTION_ARN = resp.getheader(
'Lambda-Runtime-Invoked-Function-Arn')
XRAY_TRACE_ID = resp.getheader('Lambda-Runtime-Trace-Id')
cognito_identity = json.loads(resp.getheader(
'Lambda-Runtime-Cognito-Identity', '{}'))
CONTEXT_OBJS['cognitoidentityid'] = cognito_identity.get('identity_id')
CONTEXT_OBJS['cognitopoolid'] = cognito_identity.get('identity_pool_id')
CONTEXT_OBJS['clientcontext'] = resp.getheader(
'Lambda-Runtime-Client-Context')
LOG_TAIL = resp.getheader('docker-lambda-log-type') == 'Tail'
EVENT_BODY = resp.read()
return (
INVOKEID,
DATA_SOCK,
CREDENTIALS,
EVENT_BODY,
CONTEXT_OBJS,
INVOKED_FUNCTION_ARN,
XRAY_TRACE_ID,
)
def report_fault(invokeid, msg, except_value, trace):
global ERRORED
ERRORED = True
if msg and except_value:
eprint('%s: %s' % (msg, except_value))
if trace:
eprint('%s' % trace)
def report_done(invokeid, errortype, result, is_fatal):
global ERRORED
global INIT_END_SENT
if not INVOKED:
return
if errortype is not None:
ERRORED = True
result_obj = json.loads(result)
stack_trace = result_obj.get('stackTrace')
if stack_trace is not None:
result_obj['stackTrace'] = traceback.format_list(stack_trace)
result = json.dumps(result_obj)
headers = {}
if LOG_TAIL:
headers['Docker-Lambda-Log-Result'] = base64.b64encode(LOGS.encode())
if not INIT_END_SENT:
headers['Docker-Lambda-Invoke-Wait'] = int(RECEIVED_INVOKE_AT * 1000)
headers['Docker-Lambda-Init-End'] = int(INIT_END * 1000)
INIT_END_SENT = True
MOCKSERVER_CONN.request("POST", "/2018-06-01/runtime/invocation/%s/%s" % \
(invokeid, "response" if errortype is None else "error"), result, headers)
resp = MOCKSERVER_CONN.getresponse()
if resp.status != 202:
raise Exception("/invocation/response return status %d" % resp.status)
resp.read()
def report_xray_exception(xray_json):
return
def log_bytes(msg, fileno):
global LOGS
if STAY_OPEN:
if LOG_TAIL:
LOGS += msg
(ORIG_STDOUT if fileno == 1 else ORIG_STDERR).write(msg)
else:
ORIG_STDERR.write(msg)
def log_sb(msg):
return
def get_remaining_time():
return DEADLINE_MS - int(time.time() * 1000)
def send_console_message(msg, byte_length):
log_bytes(msg + '\n', 1)