Python POST Request to Sample API with Data example

Python urllib3 : Exercise-4 with Solution

Write a Python program that makes a POST request to a sample API with some data in the request body.

Sample Solution:

Python Code :

import urllib3
import json

def make_post_request():
    # Create a PoolManager instance to manage HTTP connections
    http = urllib3.PoolManager()

    # Define the API endpoint URL
    api_url = 'https://jsonplaceholder.typicode.com/posts'

    # Define data to be sent in the request body
    post_data = {
        'title': 'Sample Title',
        'body': 'This is the body of the post.',
        'userId': 1
    }

    try:
        # Encode the data as JSON
        encoded_data = json.dumps(post_data).encode('utf-8')

        # Make a POST request with the data
        response = http.request('POST', api_url, body=encoded_data, headers={'Content-Type': 'application/json'})

        # Check if the request was successful (status code 201 for created)
        if response.status == 201:
            # Print the response data
            print("Post Request Successful:")
            print(response.data.decode('utf-8'))
        else:
            # Print an error message if the request was not successful
            print(f"Error: Unable to make POST request. Status Code: {response.status}")

    except urllib3.exceptions.RequestError as e:
        print(f"Error: {e}")

if __name__ == "__main__":
    make_post_request()

Sample Output:

 Post Request Successful:
{
  "title": "Sample Title",
  "body": "This is the body of the post.",
  "userId": 1,
  "id": 101
}

Explanation:

Here's a brief explanation of the above Python urllib3 library code:

• Import Libraries:
• urllib3: Used for handling HTTP requests.
• json: Used for encoding and decoding JSON data.
• Define Function make_post_request:
• Encapsulates the logic for making a POST request.
• Create a PoolManager Instance:
• Initializes a urllib3.PoolManager() instance to manage HTTP connections.
• Define API Endpoint and Request Data:
• Specifies the API endpoint URL (api_url).
• Creates a dictionary (post_data) containing data to be sent in the POST request body.
• Make a POST Request:
• Uses http.request() to send a POST request to the API with the specified data.
• The request includes encoded JSON data in the request body.
• Check Response and Print Results:
• Checks the HTTP status code of the response.
• If the status code is 201 (created), print the response data.
• If not, prints an error message with the status code.
• Handle Exceptions:
• Uses a try-except block to catch potential "urllib3" request-related exceptions.
• Prints an error message if exceptions occur.
• Run the Function:
• Calls the make_post_request() function when the script is executed.

Flowchart:

Python Code Editor :

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