HTTP Status Code – The Server Response
A so-called HTTP status code is sent from the server to the client (browser) to indicate whether the request was successful. In any case, a description of the respective status is sent. In the event of an error, this may involve redirects or similar issues.
The 3 most important status code categories
- All OK – Status code 200: Status codes that start with 200 (for example, 202, etc.) mean that the request was successfully accepted by the browser. Status code 200 is therefore the normal status.
- Page redirected – the 300s: Codes in the 300 range describe a redirection of the page from one URL to another.
- Permanent Redirect – Status Code 301: The web host has changed the URL. Thus, it redirects from one URL to another, and this redirect is permanent.
- Temporary Redirect – Status Code 302: If the redirect is only temporary, the status code 302 is returned. This means that the content will return to the original URL.
- Client Errors – the 400s: The codes in the 400 range indicate a bad request by the client. This means the server cannot process the request.
- Forbidden – Status code 403: The code 403 indicates that access permission is missing.
- Page not found – Status code 404: The page could not be found, it either does not exist.
- Page manually removed – Status code 410: If the page has been deleted, the server returns the error message 410.
- Server error – the 500s: Like the 400 codes, these are faulty requests. The problem with the 500s, however, lies on the server side.
- Server overloaded – 503: If the server is overloaded with requests or temporarily unavailable, error code 503 is returned.
- Server not responding – 504: If the server does not receive a response within the defined time frame, the error message 504 is displayed. This usually means the server is overloaded.
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