def module_pack(txn: Txn, txndata: TxnData):
"""Output data pack function.
It's called after 'module_run' function.
the workflow (It would no effect if there is no response needed)
@param txn Transaction context which is used for getting shared
transaction data or invoking `service.call()`
@param data Input data
@return How many bytes be consumed
"""
logger.debug("py module pack")
# Increase counters
mod_metrics = metrics.module()
mod_metrics.response.inc(1)
# Assemble response
if txn.status() != Txn.TXN_OK:
txndata.append('error')
else:
sharedData = txn.data()
logger.debug("pack data: %s" % sharedData.data)
logger.info('ModulePack', 'module_pack: data sz: {}'.format(
len(sharedData.data)))
txndata.append(sharedData.data)
def module_init(config):
print ("py module init")
Logger.trace('py module init: trace test')
Logger.debug('py module init: debug test')
Logger.info('1', 'py module init: info test')
Logger.warn('2', 'py module init: warn test', 'no suggestion')
Logger.error('3', 'py module init: error test', 'no solution')
Logger.fatal('4', 'py module init: fatal test', 'no solution')
return True
def module_init(config):
logger.debug("py module init")
logger.info('ModuleInit', 'config: {}'.format(pprint.pformat(config)))
global CFG_MIN_TTL
global CFG_MAX_TTL
global CFG_LOW_LATENCY_BAR
global CFG_LATENCY_FACTOR
CFG_MIN_TTL = config['min_ttl']
CFG_MAX_TTL = config['max_ttl']
CFG_LOW_LATENCY_BAR = config['low_latency_bar']
CFG_LATENCY_FACTOR = config['latency_factor']
return True
def score(records):
scoringTmp = []
# Calculate the latency score according to the http status info
for record in records:
ip = record.ip
ttl = record.ttl
httpInfos = record.http_info
totalLatency = 0
validRecords = 0
for httpInfo in httpInfos:
# status list:
# 0: OK
# 1: ERROR
# 2. TIMEOUT
status = httpInfo.status
httpCode = httpInfo.httpCode
latency = httpInfo.latency
if status != 1:
totalLatency += latency
else:
# For error connection record, increase 2000ms
totalLatency += 2000
validRecords += 1
# Calculate average latency and build a scoring result
avgLatency = 0
if validRecords > 0:
avgLatency = int(totalLatency / validRecords)
scoringTmp.append(
_create_result_item(ip, ttl, avgLatency, validRecords))
# Ranking
if logger.isDebugEnabled():
logger.debug("scoringTmp: {}".format(scoringTmp))
scoringResults = sorted(scoringTmp,
key=lambda record: record['avgLatency'])
if logger.isDebugEnabled():
logger.debug("scoringResults: {}".format(scoringResults))
return scoringResults
def module_run(txn: Txn):
"""
Module Runnable Entry, be called when this module be picked up in current
workflow
@param txn Transaction context
@return - True if no errors
- False if error occurred
"""
logger.debug("py module run")
# Increase counters
mod_metrics = metrics.module()
mod_metrics.request.inc(1)
return True
def _dns_response(txn, iostatus, api_name, request_msg, response_msg):
if iostatus != Txn.IO_OK:
logger.error(
"DNS_E2", "Dns response IO error: {}".format(iostatus),
'')
return False
sharedData = txn.data()
for record in response_msg.record:
if logger.isDebugEnabled():
logger.debug(
"For question: {}, qtype: {}, got ip: {}, ttl: {}".format(
sharedData.question, sharedData.qtype, record.ip,
record.ttl))
sharedData.record.add(ip=record.ip, ttl=record.ttl)
return True
def module_run(txn: Txn):
logger.debug("dns_ask module run")
sharedData = txn.data()
question = sharedData.question
question_type = sharedData.qtype
dns_query = service_dns_query_req_pto.query_req()
dns_query.question = question
dns_query.qtype = question_type == 1 and 1 or 2
logger.debug("question: {}, qtype: {}".format(question, question_type))
ret = txn.iocall('dns', 'query', dns_query, api_cb=_dns_response)
if ret == Txn.IO_OK:
return True
else:
logger.error(
"DNS_E1", "Dns call failed, ret: {}".format(ret),
'Check the parameters')
return False
def module_unpack(txn: Txn, data: bytes):
"""Input data unpack function.
It's called if this module is the 'first' module in the workflow and there
is input data incoming
@param txn Transaction context which is used for getting shared
transaction data or invoking `service.call()`
@param data Input read-only `bytes` data
@return - > 0: Tell engine N bytes be consumed
- = 0: Need more data
- < 0: Error occurred
"""
logger.debug('ModuleUnpack: receive data: {}'.format(data.decode('UTF-8')))
# Store data into txn sharedData
sharedata = txn.data()
sharedata.data = data
return len(data)
def module_release():
"""Module Release Function, it's called once when module be unloaded"""
logger.debug("py module release")
def module_release():
logger.debug("Response module release")
return
def module_init(config):
logger.debug("Response module init")
logger.info('0', 'config: {}'.format(pprint.pformat(config)))
return True
def module_release():
logger.debug("dns_ask module release")
return
def module_init(config):
logger.debug("dns_ask module init")
logger.info('ModuleInit', 'config: {}'.format(pprint.pformat(config)))
return True
def module_release():
logger.debug("py module release")
return
