Authentication with Requests

When working with APIs, authentication is often required to access protected resources. Python’s Requests library makes it simple to handle various authentication mechanisms like Basic authentication, token-based authentication, and OAuth.

Basic Authentication

Basic authentication involves sending a username and password with each request. The Requests library provides built-in support for this.

Example: Basic Authentication

import requests
 
url = "https://httpbin.org/basic-auth/user/passwd"
response = requests.get(url, auth=("user", "passwd"))
 
if response.status_code == 200:
    print("Authentication Successful")
else:
    print("Authentication Failed")

Token-Based Authentication

Token-based authentication uses a secure token in the headers to verify requests. This is common in modern APIs.

Example: Token-Based Authentication

url = "https://api.example.com/data"
headers = {
    "Authorization": "Bearer YOUR_ACCESS_TOKEN"
}
 
response = requests.get(url, headers=headers)
 
if response.status_code == 200:
    print("Data:", response.json())
else:
    print("Authentication Failed")

OAuth Authentication

OAuth is a more complex and secure method for authentication. It allows access without sharing a username and password directly.

Example: OAuth with requests-oauthlib

Install the requests-oauthlib library:

pip install requests-oauthlib

Code Example:

from requests_oauthlib import OAuth1
import requests
 
# OAuth1 credentials
url = "https://api.twitter.com/1.1/statuses/home_timeline.json"
oauth = OAuth1(
    "YOUR_CONSUMER_KEY",
    "YOUR_CONSUMER_SECRET",
    "YOUR_ACCESS_TOKEN",
    "YOUR_ACCESS_SECRET"
)
 
response = requests.get(url, auth=oauth)
 
if response.status_code == 200:
    print("Data:", response.json())
else:
    print("Authentication Failed")

Try It Yourself

Problem 1: Basic Authentication

Access the URL https://httpbin.org/basic-auth/test/test using basic authentication with username test and password test. Print the response status.

import requests
 
url = "https://httpbin.org/basic-auth/test/test"
response = requests.get(url, auth=("test", "test"))
 
if response.status_code == 200:
    print("Authentication Successful")
else:
    print("Authentication Failed")

Problem 2: Token-Based Authentication

Access the URL https://api.example.com/private with the token "123456abcdef". Print the response JSON.

import requests
 
url = "https://api.example.com/private"
headers = {
    "Authorization": "Bearer 123456abcdef"
}
 
response = requests.get(url, headers=headers)
print("Response JSON:", response.json())

Authentication is a vital part of API usage. With Requests, you can easily handle various methods, from Basic to OAuth (Open Authorization). Practice these techniques to securely interact with APIs!