python - 在将字符串用作 json 对象之前转义字符串的正确方法是什么

Question

我必须从数据库值创建 JSON 字符串并将其再次推送回数据库。我的Python代码是:

json = "{"
for row in cursor_mysql:
    #mainkey = row[0]
    #name = row[1]
    #value = row[2]
    mainkey = """"  " \n \ /  """    #for testing only
    name = """    {} " \r \t  """    #for testing only
    value = """  ' " \ &      """    #for testing only
    json += """"%s":{"name":"%s","value":"%s"},""" % (re.escape(mainkey), re.escape(name), re.escape(value))

json = json[:-1]
json += "}"
#print json
query = """UPDATE table SET json = '%s' WHERE id = '%d' RETURNING id""" %  (json, rowId)
cursor_postgres.execute(query)
conn_postgres.commit()
insertId = cursor_postgres.fetchone()[0]

当周围没有恶意字符时，此代码非常有效。但是，当撒满非字母数字值时，它不起作用，如上面的测试用例所示。

进入我的数据库的错误 JSON 是:

{
    """ 
 \ /   ": {
        "name": " {} "","value":"'"  "
    },
    """ 
 \ /   ": {
        "name": " {} "","value":"'"  "
    }
}

如何清理字符串，以便反序列化时 json 输出与输入相同？

Answer 1

import json

data = json.dumps(BIG_STRUCTURE_GOES_HERE)
query = """UPDATE table SET json = %s WHERE id = %s RETURNING id"""
cursor_postgres.execute(query, (data, rowId))
conn_postgres.commit()