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bootstrap.py3
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bootstrap.py3
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#!/opt/pypy/bin/pypy
import decimal
import json
import os
import site
import sys
import urllib.request as request
import time
HANDLER = os.getenv("_HANDLER")
RUNTIME_API = os.getenv("AWS_LAMBDA_RUNTIME_API")
for path in ["/opt/pypy", "/opt/pypy/site-packages"]:
sys.path.insert(0, path)
site.addsitedir(path)
if "LAMBDA_TASK_ROOT" in os.environ:
sys.path.insert(0, os.environ["LAMBDA_TASK_ROOT"])
site.addsitedir(os.environ["LAMBDA_TASK_ROOT"])
class LambdaContext(object):
def __init__(self, request_id, invoked_function_arn, deadline_ms, trace_id):
self.aws_request_id = request_id
self.deadline_ms = deadline_ms
self.function_name = os.getenv("AWS_LAMBDA_FUNCTION_NAME")
self.function_version = os.getenv("AWS_LAMBDA_FUNCTION_VERSION")
self.invoked_function_arn = invoked_function_arn
self.log_group_name = os.getenv("AWS_LAMBDA_LOG_GROUP_NAME")
self.log_stream_name = os.getenv("AWS_LAMBDA_LOG_STREAM_NAME")
self.memory_limit_in_mb = os.getenv("AWS_LAMBDA_FUNCTION_MEMORY_SIZE")
self.trace_id = trace_id
if self.trace_id is not None:
os.environ["_X_AMZN_TRACE_ID"] = self.trace_id
def get_remaining_time_in_millis(self):
if self.deadline_ms is not None:
return time.time() * 1000 - int(self.deadline_ms)
def decimal_serializer(obj):
if isinstance(obj, decimal.Decimal):
return float(obj)
raise TypeError(repr(obj) + " is not JSON serializable")
def init_error(message, type):
details = {"errorMessage": message, "errorType": type}
details = json.dumps(details).encode("utf-8")
req = request.Request(
"http://%s/2018-06-01/runtime/init/error" % RUNTIME_API,
details,
{"Content-Type": "application/json"},
)
with request.urlopen(req) as res:
res.read()
def next_invocation():
with request.urlopen(
"http://%s/2018-06-01/runtime/invocation/next" % RUNTIME_API
) as res:
request_id = res.getheader("lambda-runtime-aws-request-id")
invoked_function_arn = res.getheader("lambda-runtime-invoked-function-arn")
deadline_ms = res.getheader("lambda-runtime-deadline-ms")
trace_id = res.getheader("lambda-runtime-trace-id")
event_payload = res.read()
event = json.loads(event_payload.decode("utf-8"))
context = LambdaContext(request_id, invoked_function_arn, deadline_ms, trace_id)
return request_id, event, context
def invocation_response(request_id, handler_response):
if not isinstance(handler_response, (bytes, str)):
handler_response = json.dumps(handler_response, default=decimal_serializer)
if not isinstance(handler_response, bytes):
handler_response = handler_response.encode("utf-8")
req = request.Request(
"http://%s/2018-06-01/runtime/invocation/%s/response"
% (RUNTIME_API, request_id),
handler_response,
{"Content-Type": "application/json"},
)
with request.urlopen(req) as res:
res.read()
def invocation_error(request_id, error):
details = {"errorMessage": str(error), "errorType": type(error).__name__}
details = json.dumps(details).encode("utf-8")
req = request.Request(
"http://%s/2018-06-01/runtime/invocation/%s/error" % (RUNTIME_API, request_id),
details,
{"Content-Type": "application/json"},
)
with request.urlopen(req) as res:
res.read()
if __name__ == "__main__":
for runtime_var in ["AWS_LAMBDA_RUNTIME_API", "_HANDLER"]:
if runtime_var not in os.environ:
init_error("%s environment variable not set" % runtime_var, "RuntimeError")
sys.exit(1)
try:
module_path, handler_name = HANDLER.rsplit(".", 1)
except ValueError:
init_error("Improperly formated handler value: %s" % HANDLER, "ValueError")
sys.exit(1)
module_path = module_path.replace("/", ".")
try:
module = __import__(module_path)
except ImportError:
init_error("Failed to import module: %s" % module_path, "ImportError")
sys.exit(1)
try:
handler = getattr(module, handler_name)
except AttributeError:
init_error(
"No handler %s in module %s" % (handler_name, module_path), "AttributeError"
)
sys.exit(1)
while True:
request_id, event, context = next_invocation()
try:
handler_response = handler(event, context)
except Exception as e:
invocation_error(request_id, e)
else:
invocation_response(request_id, handler_response)