我有一个python脚本,该脚本应该遍历文本文件,并从文本文件中的每一行收集域作为参数。然后,应该使用域作为SQL查询中的参数。问题是当我将 domain_name 作为参数传递时,脚本生成的JSON输出为空。如果我直接在查询中的SQL查询中设置domain_name参数,则脚本将输出完美的JSON格式。正如您在def connect_to_db()下方的脚本顶部所看到的那样,我开始循环浏览文本文件。我不确定在任何帮助下发生错误的代码将不胜感激!
代码
from __future__ import print_function
try:
import psycopg2
except ImportError:
raise ImportError('\n\033[33mpsycopg2 library missing. pip install psycopg2\033[1;m\n')
sys.exit(1)
import re
import sys
import json
import pprint
DB_HOST = 'crt.sh'
DB_NAME = 'certwatch'
DB_USER = 'guest'
def connect_to_db():
filepath = 'test.txt'
with open(filepath) as fp:
for cnt, domain_name in enumerate(fp):
print("Line {}: {}".format(cnt, domain_name))
print(domain_name)
domain_name = domain_name.rstrip()
conn = psycopg2.connect("dbname={0} user={1} host={2}".format(DB_NAME, DB_USER, DB_HOST))
cursor = conn.cursor()
cursor.execute(
"SELECT c.id, x509_commonName(c.certificate), x509_issuerName(c.certificate) FROM certificate c, certificate_identity ci WHERE c.id = ci.certificate_id AND ci.name_type = 'dNSName' AND lower(ci.name_value) = lower('%s') AND x509_notAfter(c.certificate) > statement_timestamp();".format(
domain_name))
unique_domains = cursor.fetchall()
# print out the records using pretty print
# note that the NAMES of the columns are not shown, instead just indexes.
# for most people this isn't very useful so we'll show you how to return
# columns as a dictionary (hash) in the next example.
pprint.pprint(unique_domains)
outfilepath = domain_name + ".json"
with open(outfilepath, 'a') as outfile:
outfile.write(json.dumps(unique_domains, sort_keys=True, indent=4))
if __name__ == "__main__":
connect_to_db()
答案 0 :(得分:2)
请勿使用格式创建SQL语句。采用 ?占位符,然后是要插入的值的元组:
c.execute('''SELECT c.id, x509_commonName(c.certificate),
x509_issuerName(c.certificate) FROM certificate c, certificate_identity ci WHERE
c.id= ci.certificate_id AND ci.name_type = 'dNSName' AND lower(ci.name_value) =
lower(?) AND x509_notAfter(c.certificate) > statement_timestamp()''',(domain_name,))
更笼统地说:
c.execute('''SELECT columnX FROM tableA where columnY = ? AND columnZ =?'''
(desired_columnY_value,desired_columnZ_value))