将 json 字段解析为变量

Question

我正在尝试从 API 查询解析 json 输出的字段。

示例 json：

{
   "_id":"611a7b651571d300074b9875",
   "Details":{
      "Source":{
         "Type":"WHOIS servers",
         "URL":"http://tiktea.com.au",
         "NetworkType":"ClearWeb"
      },
      "Type":"Phishing",
      "SubType":"RegisteredSuspiciousDomain",
      "Severity":"Medium"
   },
   "Assignees":[
      
   ],
   "FoundDate":"2021-08-16T14:51:17.747Z",
   "Assets":[
      {
         "Type":"Domains",
         "Value":"iktea.net"
      }
   ],
   "TakedownStatus":"NotSent",
   "IsFlagged":false,
   "Closed":{
      "IsClosed":false
   }
}

我想解析一些字段，得到类似的东西：

URL: http://tiktea.com.au
FoundDate: 2021-08-16T14:51:17.747Z"

所以我尝试了这个，但没有成功：Selecting fields from JSON output

这是我的python代码：

import requests
import json


#UserID + Api Key
auth = ('USERID','APIKEY')
headers = {    'Content-Type': "application/json",    }


url = "https://api.intsights.com/public/v1/data/alerts/alerts-list?alertType=Phishing
alerts = requests.request("GET", url, auth = auth, headers=headers)

for alertID in alerts.text.split('","'):
  url = "https://api.intsights.com/public/v1/data/alerts/get-alert/"+alertID #<-----This is the request that extract the JSON
  alertDetails = requests.request("GET", url, auth = auth, headers=headers)
  

  dict = alertDetails.text
  url=dict['Assets'][0]['Value'] #<---------Trying to parse the desired value
  print(url)

这是结果：

Traceback (most recent call last):
  File "cefexample.py", line 73, in <module>
    url=dict['Assets'][0]['Value']
TypeError: string indices must be integers

有什么建议吗？

Answer 1

首先你需要解析响应的 JSON。

data = alertDetails.json() # use convenience method

然后像嵌套字典一样访问你想要的字段。

url = data['Details']['Source'].get('URL')
print (f'Phishing URL: {url}')
found_date = data.get('FoundDate')
print(f'Found date: {found_date}')

这假设（基于您显示的错误）Deatails 和 Source 将始终存在，只有 URL 键可能丢失。为了安全起见，您可以这样做

url = data.get('Details', {}).get('Source', {}).get('URL')
print (f'Phishing URL: {url}')

或使用 try/except:

try:
    url = data['Details']['Source']['URL']
except KeyError:
    url = None
print (f'Phishing URL: {url}')