


Why can't my code get the data returned by the API? How to solve this problem?
Troubleshooting and solving the problem that Python code cannot obtain the data returned by API
This article analyzes a Python code case that returns empty values when calling ip-api.com
API using the requests
library and provides a solution.
Problem description
The following code tries to get the batch IP information of ip-api.com
using a POST request, but always returns a null value:
import random, requests, json ip = [ "49.104.25.257", "39.115.131.116" ] api = "http://ip-api.com/batch?fields=58898?lang=zh_cn" headers = { "user-agent": "mozilla/5.0 (windows nt 10.0; win64; x64) applewebkit/537.36 (khtml, like gecko) chrome/119.0.0.0 safari/537.36 edg/119.0.0.0", "content-type":"application/json" } ip = json.dumps(ip, ensure_ascii=False, indent=2) print(ip) resp = requests.post(url=api,data=ip,headers=headers) print(resp.status_code) print(resp.text) resp.close()
This API is a free version with a limit of 45 requests per minute, using POST requests, fields=58898
is used to specify the return field. Although there is no problem in querying the IP directly on the API website, the code always returns a null value and requests
library does not report an error.
Problem analysis and solutions
After carefully checking the code and API documentation, I found that the problem is the query parameter settings of the URL. In the original code, the URL is:
api = "http://ip-api.com/batch?fields=58898?lang=zh_cn"
&
connection should be used between multiple query parameters, rather than continuous use ?
The correct URL should be:
api = "http://ip-api.com/batch?fields=58898&lang=zh_CN"
In addition, it is recommended to set the lang
parameter to zh_CN
to ensure that Chinese data is returned. At the same time, User-Agent
and content-type
in HTTP Header should use the standard naming method, with the initials capitalized.
Here is the modified complete code:
import requests import json ip = [ "49.104.25.257", "39.115.131.116" ] api = "http://ip-api.com/batch?fields=58898&lang=zh_CN" headers = { "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36 Edg/119.0.0.0", "Content-Type": "application/json" } ip = json.dumps(ip, ensure_ascii=False, indent=2) print(ip) resp = requests.post(url=api, data=ip, headers=headers) print(resp.status_code) print(resp.text) resp.close()
By modifying the URL and HTTP Header, the API returns data can be successfully obtained. This example illustrates the potential failure of a subtle syntax error in API calls, emphasizing the importance of double-checking URLs and parameters.
The above is the detailed content of Why can't my code get the data returned by the API? How to solve this problem?. For more information, please follow other related articles on the PHP Chinese website!

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