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python requests post retry

Narkw Brahma

Narkw Brahma

• 1 min read

Python Requests Post Retry

Python Requests is a popular library used for making HTTP requests in Python. It is simple and easy to use. However, sometimes the HTTP request may fail due to network issues or server errors. In such cases, it may be necessary to retry the request to ensure that it is successful.

Method 1: Retry with max retries

The simplest way to retry a failed request is to use the built-in retry functionality in the requests library. This can be done using the 'max_retries' parameter in the 'Session' object.


import requests
from requests.adapters import HTTPAdapter
from requests.packages.urllib3.util.retry import Retry

session = requests.Session()
retry = Retry(total=3, backoff_factor=0.5)
adapter = HTTPAdapter(max_retries=retry)
session.mount('http://', adapter)
session.mount('https://', adapter)

try:
    response = session.post(url, data=data)
    # handle response
except requests.exceptions.RequestException as e:
    # handle exception

In the above code, we create a session object and configure it to retry the request a maximum of 3 times with an increasing delay between retries. If the request still fails after 3 retries, an exception will be raised.

Method 2: Custom retry logic

Sometimes, the default retry logic provided by requests may not be sufficient. In such cases, we can implement our own retry logic using a loop and a sleep function.


import requests
import time

def post_with_retry(url, data, retries=3):
    for i in range(retries):
        try:
            response = requests.post(url, data=data)
            if response.status_code == 200:
                return response
        except requests.exceptions.RequestException as e:
            # handle exception
        time.sleep(1)
    return None

response = post_with_retry(url, data)

In the above code, we define a function 'post_with_retry' that takes the url, data and number of retries as input. It then tries to execute the request using a loop and waits for 1 second between retries. If the request is successful, it returns the response. Otherwise, it returns None.

Conclusion

In this article, we have seen two methods for retrying failed HTTP requests using the Python Requests library. The first method uses the built-in retry functionality provided by requests, while the second method implements custom retry logic using a loop and a sleep function. Depending on the specific use case, one method may be more suitable than the other.

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