try :
sf = Salesforce(username = sfdc_username,
password = sfdc_password,
security_token = sfdc_security_token,
instance_url = sfdc_salesforce_instance_url,
domain = sfdc_sandbox)
print('salesforce login good')
except (SalesforceGeneralError,
SalesforceMoreThanOneRecord,
SalesforceMalformedRequest,
SalesforceExpiredSession,
SalesforceRefusedRequest,
SalesforceResourceNotFound) as e :
print(e.content[0]['message'])
sys.exit(1)
lambda上的这段代码失败，并显示以下错误：
a bytes-like object is required, not 'str': TypeError
Traceback (most recent call last):
File "/var/task/sfdc_etl/bin/sfdc_etl.py", line 80, in lambda_handler
domain = sfdc_sandbox)
File "/var/task/sfdc_etl/lib/python3.6/site-packages/simple_salesforce/api.py", line 146, in __init__
domain=self.domain)
File "/var/task/sfdc_etl/lib/python3.6/site-packages/simple_salesforce/login.py", line 80, in SalesforceLogin
username = escape(username)
File "/var/lang/lib/python3.6/html/__init__.py", line 19, in escape
s = s.replace("&", "&") # Must be done first!
TypeError: a bytes-like object is required, not 'str'
当我将此代码移至EC2亚马逊Linux上的测试环境并将sfdc_sandox设置为“ test”时，它可以正常工作。我尝试使用os.environb [“ L_SFDC_SANDBOX”]和os.environ [“ L_SFDC_SANDBOX”]。encode（'utf8'），但这也没有帮助，因为它给出了相同的错误。在Lambda中引入此变量时，如何解决类型错误？
这是整个脚本，也许错误不是由于那段特定的代码造成的，即使看起来像是这样。
import os
import sys
# this adds the parent directory of bin so we can find the module
parent_dir = os.path.abspath(os.path.join(os.path.dirname(__file__), os.path.pardir))
sys.path.append(parent_dir)
#This addes venv lib/python2.7/site-packages/ to the search path
mod_path = os.path.abspath(parent_dir+"/lib/python"+str(sys.version_info[0])+"."+str(sys.version_info[1])+"/site-packages/")
sys.path.append(mod_path)
from awsmgr.awsmgr import S3Helper
from base64 import b64decode
import boto3
from collections import OrderedDict
import datetime
from dateutil.parser import parse
import logging
import json
import math
import pandas as pd
from simple_salesforce import Salesforce, SalesforceLogin
from simple_salesforce.exceptions import SalesforceGeneralError, SalesforceMoreThanOneRecord, SalesforceMalformedRequest, SalesforceExpiredSession, SalesforceRefusedRequest, SalesforceResourceNotFound
from sqlalchemy import create_engine
from sqlalchemy import exc
current_path = os.path.dirname(os.path.realpath(__file__))
# Use this one for the parent directory
ENV_ROOT = os.path.abspath(os.path.join(current_path, os.path.pardir))
# Use this one for the current directory
#ENV_ROOT = os.path.abspath(os.path.join(current_path))
sys.path.append(ENV_ROOT)
def lambda_handler(event, context):
###############################
# Global Variable Definitions #
###############################
d_parse = parse
TMP_PATH = '/tmp'
igersUser = 'admin'
igersPwd = boto3.client('kms').decrypt(CiphertextBlob=b64decode(os.environ["RS_PASSWORD"]))['Plaintext']
igersHost = os.environ["RS_HOST"]
igers = create_engine('postgres://{}:{}@{}/ibdrs'.format(igersUser, igersPwd, igersHost), encoding="utf-8")
igersSchema = os.environ["RS_SCHEMA"]
s3 = S3Helper(debug=os.environ["DEBUG"])
nextObjFile = s3.get_s3_file('s3://test-sfdc-sds-team/sfdc-etl-jp-test/sfdc_etl/objects/next_object.txt',os.path.abspath(os.path.join(TMP_PATH,'next_object.txt')))
s3Destination = 's3://test-sfdc-sds-team/sfdc-etl-jp-test/sfdc_etl/json/'
s3Path = '{}_json'
s3NextObjDestination = 's3://test-sfdc-sds-team/sfdc-etl-jp-test/sfdc_etl/objects/{}'
fileCount = 1
sfdc_username = os.environ["L_USERNAME"].encode('utf8')
sfdc_salesforce_instance_url = os.environ["L_SALESFORCE_INSTANCE_URL"].encode('utf8')
sfdc_password = boto3.client('kms').decrypt(CiphertextBlob=b64decode(os.environ["L_PASSWORD"]))['Plaintext']
sfdc_security_token = boto3.client('kms').decrypt(CiphertextBlob=b64decode(os.environ["L_SECURITY_TOKEN"]))['Plaintext']
sfdc_sandbox = os.environ["L_SFDC_SANDBOX"].encode('utf8')
print(type(sfdc_username), type(sfdc_password), type(sfdc_security_token), type(sfdc_salesforce_instance_url), type(sfdc_sandbox))
try :
sf = Salesforce(username = sfdc_username,
password = sfdc_password,
security_token = sfdc_security_token,
instance_url = sfdc_salesforce_instance_url,
domain = sfdc_sandbox)
print('salesforce login good')
except (SalesforceGeneralError,
SalesforceMoreThanOneRecord,
SalesforceMalformedRequest,
SalesforceExpiredSession,
SalesforceRefusedRequest,
SalesforceResourceNotFound) as e :
print(e.content[0]['message'])
sys.exit(1)
# get nextobj from s3
with open(nextObjFile, 'r') as f :
nextObjItem = f.read().strip().lower()
nextObj = nextObjItem.lower()
print('Processing {}'.format(nextObj))
######################################################
# get rs table group permissions, store in dataframe #
######################################################
def rsGetGroupPerms(igers, nextObj) :
global groupPerms
groupPerms = {}
existingGroupPerms = '''
SELECT
namespace, item, type, groname
FROM
(
SELECT
use.usename AS subject,
nsp.nspname AS NAMESPACE,
cls.relname AS item,
cls.relkind AS TYPE,
use2.usename AS OWNER,
cls.relacl
FROM
pg_user use
CROSS JOIN pg_class cls
LEFT JOIN pg_namespace nsp ON cls.relnamespace = nsp.oid
LEFT JOIN pg_user use2 ON cls.relowner = use2.usesysid
WHERE
cls.relowner = use.usesysid
AND nsp.nspname NOT IN ( 'pg_catalog', 'pg_toast', 'information_schema' )
AND nsp.nspname IN ( 'salesforce' )
AND relacl IS NOT NULL
ORDER BY
subject,
NAMESPACE,
item
)
JOIN pg_group pu ON array_to_string( relacl, '|' ) LIKE'%%' || pu.groname || '%%'
WHERE item = '{}'
'''.format(nextObj)
groupPerms = pd.read_sql(existingGroupPerms, igers)
print('got the group permissions')
return groupPerms
#####################################################
# get rs table user permissions, store in dataframe #
# NOT CURRENTLY IN USE #
#####################################################
#def rsGetUseerPerms(igers, nextObj) :
# existingUserPerms = '''
# SELECT *
# FROM
# (
# SELECT
# schemaname
# ,objectname
# ,usename
# ,HAS_TABLE_PRIVILEGE(usrs.usename, fullobj, 'select') AND has_schema_privilege(usrs.usename, schemaname, 'usage') AS sel
# ,HAS_TABLE_PRIVILEGE(usrs.usename, fullobj, 'insert') AND has_schema_privilege(usrs.usename, schemaname, 'usage') AS ins
# ,HAS_TABLE_PRIVILEGE(usrs.usename, fullobj, 'update') AND has_schema_privilege(usrs.usename, schemaname, 'usage') AS upd
# ,HAS_TABLE_PRIVILEGE(usrs.usename, fullobj, 'delete') AND has_schema_privilege(usrs.usename, schemaname, 'usage') AS del
# ,HAS_TABLE_PRIVILEGE(usrs.usename, fullobj, 'references') AND has_schema_privilege(usrs.usename, schemaname, 'usage') AS ref
# FROM
# (
# SELECT schemaname, 't' AS obj_type, tablename AS objectname, schemaname + '.' + tablename AS fullobj FROM pg_tables
# UNION
# SELECT schemaname, 'v' AS obj_type, viewname AS objectname, schemaname + '.' + viewname AS fullobj FROM pg_views
# ) AS objs
# ,(SELECT * FROM pg_user) AS usrs
# ORDER BY fullobj
# )
# WHERE (sel = true or ins = true or upd = true or del = true or ref = true)
# and objectname = '{}'
# '''.format(nextObj)
#
# userPerms = pd.read_sql_query(existingUserPerms, igers)
# return userPerms
####################################################
# Connect to Salesforce, Query JSON, and Copy to S3#
####################################################
def sfToS3(fileCount, sf, nextObj) :
# Initiate list for returned data
pulls = []
# Pull initial Query
sfobject = sf.restful('sobjects/{}/describe/'.format(nextObj), params=None)
fields_list = [record['name'] for record in sfobject['fields']]
initialQuery = sf.query("SELECT {} FROM {}".format(','.join(fields_list),nextObj))
#Send a single file or the first file to S3
data = initialQuery['records']
try :
send_temp_jsonl_to_s3(data, nextObj, s3, s3Destination, fileCount, s3Path)
# Append initial query data to pulls
if 'nextRecordsUrl' in initialQuery :
pulls.append(initialQuery['nextRecordsUrl'])
nextChunk = initialQuery['nextRecordsUrl']
nextQuery = sf.query_more(nextChunk,True)
if 'nextRecordsUrl' in nextQuery :
pulls.append(nextQuery['nextRecordsUrl'])
x = True
fileCount = 2
while x == True:
try:
# set up while loop to re-query salesforce until returned
# query does not have a 'nextRecordsUrl' return value
# Query new 'nextRecordsUrl'
nextQuery = sf.query_more(nextQuery['nextRecordsUrl'],True)
# append new query to pulls
pulls.append(nextQuery['nextRecordsUrl'])
except: # This triggers when nextQuery['nextRecordsUrl'] does not exist
# set x to False to end loop
x = False
#if there was a follow on set of records, query it and add to S3
if len(pulls) >= 1 :
for i in range(len(pulls)) :
data = sf.query_more(str(pulls[i].split('/')[5]))['records']
send_temp_jsonl_to_s3(data, nextObj, s3, s3Destination, fileCount, s3Path)
fileCount += 1
print('completed sending JSON files to S3')
except :
print('Salesforce Object Empty, ending execution')
updateNextObj(nextObj, s3NextObjDestination)
sys.exit(1)
####################
# JSONL to S3 #
####################
def send_temp_jsonl_to_s3(data, nextObj, s3, s3Destination, fileCount, s3Path) :
fileName = '{}_file{}.json'
localFilePath ='/tmp/'
for element in data :
item = data.pop()
item.pop('attributes', None)
tempdict = OrderedDict({})
for k,v in item.items() :
if 'date' in k.lower() or 'stamp' in k.lower() :
if not v is None :
d = d_parse(v)
v = d.strftime('%Y-%m-%d %I:%M:%S')
tempdict[k.lower()] = v
else :
tempdict[k.lower()] = v
with open(localFilePath+fileName.format(nextObj,fileCount), 'a') as outfile :
outfile.write(json.dumps(tempdict))
outfile.write('\n')
s3.put_s3_file_datedpath(localFilePath+fileName.format(nextObj,fileCount),s3Destination+s3Path.format(nextObj))
os.remove(localFilePath+fileName.format(nextObj,fileCount))
#################################################
# maps SFDC type to SQL type - used for ddl #
#################################################
def map_data_type(sfdc_type, length):
"""
Definition to map Salesforce datatype to Redshift datatype.
"""
__MULTIPLIER = 1.3 # may not be Zero!
if length == 0:
length = 1092
if length == 4095:
length = 15000
if length > 65535:
length = 65534
if sfdc_type == u'boolean':
return u'varchar(5)'
elif sfdc_type == u'date':
return u'timestamp'
elif sfdc_type == u'datetime':
return u'timestamp'
elif sfdc_type == u'currency':
return u'decimal(38,6)'
elif sfdc_type == u'double':
return u'decimal(38,6)'
elif sfdc_type == u'int':
return u'numeric(10)'
elif sfdc_type == u'picklist':
return u'varchar({})'.format(length)
elif sfdc_type == u'id':
return u'varchar({})'.format(length)
elif sfdc_type == u'reference':
return u'varchar({})'.format(length)
elif sfdc_type == u'textarea':
if length >= (65535/length*__MULTIPLIER):
return u'varchar({})'.format(65534)
else:
return u'varchar({})'.format( math.ceil(length*__MULTIPLIER))
elif sfdc_type == u'email':
return u'varchar({})'.format(length)
elif sfdc_type == u'phone':
return u'varchar({})'.format(length)
elif sfdc_type == u'url':
return u'varchar({})'.format(length)
elif sfdc_type == u'multipicklist':
return u'varchar({})'.format(length)
elif sfdc_type == u'anyType':
if length >= 65535:
return u'varchar({})'.format(65534)
else:
return u'varchar({})'.format(math.ceil(length*__MULTIPLIER))
elif sfdc_type == u'percent':
return u'numeric(38,6)'
elif sfdc_type == u'combobox':
return u'varchar({})'.format(length)
elif sfdc_type == u'base64':
return u'varchar({})'.format(length)
elif sfdc_type == u'time':
return u'varchar(255)'
elif sfdc_type == u'string':
if length >= 65535:
return u'varchar({})'.format(65534)
else:
return u'varchar({})'.format(math.ceil(length*__MULTIPLIER))
else:
return u'varchar(65535)'
####################################
# Turn SFDC metadata into SQL #
####################################
def get_ddl(sf, nextObj, igersSchema, col_remove=None):
md = sf.restful("sobjects/{}/describe/".format(nextObj), params=None)
target_table=nextObj
total_field_count = 0
global ddl_str
ddl_str = ''
ddl_str += 'CREATE TABLE '+ igersSchema+"."+target_table +' ('
for x in md["fields"]:
#print x["name"]
if col_remove:
if x["name"].lower() in [element.lower() for element in col_remove]:
print("Skipping: {}".format(x["name"]))
continue
ddl_str += x["name"] + ' ' + map_data_type(x["type"],x["length"])
if x["name"] == 'Id':
ddl_str += ' NOT NULL DISTKEY'
ddl_str += ","
total_field_count = total_field_count + 1
ddl_str = ddl_str[:-1]
ddl_str += ')'
logging.info('DDL Successfully created...')
# print("Total Field Count: "+str(total_field_count))
return ddl_str
#########################
# Create Table from DDL, execute the copy query and update permissions #
#########################
def rs_operations(ddl_str, groupPerms, igersSchema, nextObj, s3Destination, s3Path, igers) :
today = datetime.date.today()
dated_path = today.strftime('%Y/%m/%d')
perms_statement = ''
drop_table = '''
DROP TABLE IF EXISTS {}.{} CASCADE
'''.format(igersSchema, nextObj)
loadQuery = '''
COPY {}.{}
FROM '{}{}/{}/'
iam_role 'arn:aws:iam::087024238921:role/LambdaFullAccessRole'
TRUNCATECOLUMNS
FORMAT AS JSON 'auto'
'''.format(igersSchema, nextObj, s3Destination, s3Path.format(nextObj), dated_path)
grantPerms = '''
GRANT SELECT ON {}.{} TO GROUP {}
'''
with igers.connect() as conn:
try :
conn.execute(drop_table)
print('completed drop table')
conn.execute(ddl_str)
print('completed create table')
conn.execute(loadQuery)
print('completed load query')
for row in range(len(groupPerms)) :
perms_statement = grantPerms.format(groupPerms['namespace'].iloc[row],groupPerms['item'].iloc[row],groupPerms['groname'].iloc[row])
conn.execute(perms_statement)
print('completed grant group permissions')
conn.close()
except exc.SQLAlchemyError as e :
print(e)
######################################
# Update Next Object and Write to S3 #
######################################
def updateNextObj(nextObj, s3NextObjDestination) :
objectsList = []
objectsFile = s3.get_s3_file('s3://test-sfdc-sds-team/sfdc-etl-jp-test/sfdc_etl/objects/sfdc_etl_objects.txt',os.path.abspath(os.path.join(TMP_PATH,'sfdc_etl_objects.txt')))
localNobjTempFile = os.path.abspath(os.path.join(TMP_PATH,'next_object.txt'))
nextObjText = ''
with open (objectsFile, 'r') as objs :
for line in objs :
objectsList.append(line.strip("\n"))
for i in range(len(objectsList)-1) :
if objectsList[i].lower() == nextObj :
nextObjText = objectsList[i+1]
print(nextObjText)
with open (localNobjTempFile, 'w') as f :
f.write(nextObjText)
s3.put_s3_file(localNobjTempFile,s3NextObjDestination.format('next_object.txt'))
print('completed Updating the next object')
################################################
# Test if the object exists and execute #
################################################
try :
getattr(sf,nextObj).describe()
except (SalesforceGeneralError,
SalesforceMoreThanOneRecord,
SalesforceMalformedRequest,
SalesforceExpiredSession,
SalesforceRefusedRequest,
SalesforceResourceNotFound) as e :
print(e.content[0]['message'] +', writing next object and ending')
updateNextObj(nextObj, s3NextObjDestination)
sys.exit(1)
rsGetGroupPerms(igers, nextObj)
sfToS3(fileCount, sf, nextObj)
get_ddl(sf, nextObj, igersSchema, col_remove=None)
rs_operations(ddl_str, groupPerms, igersSchema, nextObj, s3Destination, s3Path, igers)
updateNextObj(nextObj, s3NextObjDestination)
答案 0 :(得分：0)
问题是以下行
sfdc_password = boto3.client('kms').decrypt(CiphertextBlob=b64decode(os.environ["L_PASSWORD"]))['Plaintext']
返回一个字节对象，另一方面，Salesforce类需要一个字符串。
解决方案：
try :
sf = Salesforce(username=sfdc_username,
password=sfdc_password.decode("utf-8"),
security_token=sfdc_security_token,
instance_url=sfdc_salesforce_instance_url,
domain=sfdc_sandbox)
print('salesforce login good')
请注意，sfdc_password变量已使用.decode字节方法转换为字符串