About 200 OK
Overview of 200 OK
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200 OK Overview The 200 OK status code indicates that the client’s request has been successfully processed and the server has returned a response to signify this success. It is used in a wide range of scenarios, such as retrieving resources with GET requests or confirming successful processing of POST requests. |
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Meaning The client’s request was successfully processed, and the server returned the requested resource or information. |
When is 200 OK Returned?
- When a GET request is successfully processed and the requested resource is returned
- When a POST request is successful and the server returns the result
- When an API request succeeds, and the expected data is included in the response
Examples of 200 OK
Successful GET Request
GET /index.html HTTP/1.1 Host: example.com
Response example:
HTTP/1.1 200 OK Content-Type: text/html; charset=UTF-8 <html> <head><title>Example</title></head> <body><p>Hello, world!</p></body> </html>
Explanation: This occurs when a client makes a GET request for a specific resource (e.g., index.html), and the server successfully processes the request and returns the resource content.
Successful API Request
GET /api/user/123 HTTP/1.1 Host: example.com
Response example:
HTTP/1.1 200 OK
Content-Type: application/json
{
"id": 123,
"name": "John Doe",
"email": "john.doe@example.com"
}
Explanation: This occurs when a client sends a request to an API endpoint, and the server correctly processes the request and returns data in JSON format.
Points to Note
Considerations when using the 200 OK status code:
- Return meaningful responses
Although 200 OK indicates a successful request, the response content must be meaningful to avoid confusing the client. - Clarify resource availability
Only return 200 OK when the resource is successfully processed. If the processing is incomplete, use an appropriate error code.
Comparison with Related HTTP Status Codes
Here is an explanation of status codes related to 200 OK:
- 201 Created: Used when a request succeeds, and a new resource is created.
- 204 No Content: Used when a request succeeds, but the response body is empty.
Understanding these differences helps in appropriately using the 200 status code.