HTTP 204 No Content: Meaning, Use Cases, and Best Practices
Blog post from Postman
The HTTP status code 204, "No Content," is used to indicate a successful operation that requires no response payload, often utilized in scenarios like DELETE requests or when updating resources where the client already knows the final state. It contrasts with other success codes like 200 OK, which involves a response body, 201 Created, which indicates resource creation, and 202 Accepted, used for asynchronous operations. Proper implementation involves ensuring responses are genuinely empty, using meaningful headers like Cache-Control, and avoiding mistakes such as returning a body with the 204 response or using it for errors. Testing in Postman involves verifying the absence of a response body and ensuring the Content-Length is zero or absent. By following best practices, developers can ensure their APIs are efficient, semantically correct, and consistent, reducing unnecessary data transfer and simplifying client-side processing.
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