204 Status Code: Meaning and Usage in REST APIs

The 204 status code means "No Content" in HTTP responses. It tells the client that the request was successful but there is no data to send back in the response body.

How It Works

Imagine you ask a friend to check if a door is locked. Instead of them telling you "yes" or "no," they just nod silently to confirm the door is locked. The 204 status code works similarly in web communication. It tells the client that the server successfully processed the request but has nothing to send back.

This is useful because it saves bandwidth and time by not sending unnecessary data. The client understands the action was successful and can continue without waiting for extra information.

Example

This example shows a simple HTTP server in Python that responds with a 204 status code when a DELETE request is made, indicating the resource was deleted successfully but no content is returned.

python

from http.server import BaseHTTPRequestHandler, HTTPServer

class SimpleHandler(BaseHTTPRequestHandler):
    def do_DELETE(self):
        self.send_response(204)  # No Content
        self.end_headers()

if __name__ == '__main__':
    server = HTTPServer(('localhost', 8000), SimpleHandler)
    print('Server running on http://localhost:8000')
    server.serve_forever()

Output

Server running on http://localhost:8000

When to Use

Use the 204 status code when a client sends a request that changes something on the server but does not need any data back. Common cases include:

• Deleting a resource successfully.
• Updating a resource without returning the updated data.
• Performing an action that requires no response body, like logging out.

This helps keep communication efficient and clear.

Key Points

• 204 means success with no content returned.
• It saves bandwidth by not sending a response body.
• Clients should not expect any data in the response.
• Commonly used for DELETE or update operations.

Key Takeaways

204 status code means the request succeeded but no content is returned.

Use 204 to confirm actions like delete or update without sending data back.

It helps make communication between client and server faster and lighter.

Clients receiving 204 should not expect any response body.

204 improves efficiency by avoiding unnecessary data transfer.