HTTP

HTTP Status Code 103 refers to Early Hints. It was introduced to allow the server to send some response headers to the client before the final response is ready. This code is typically used to preload resources, allowing the client to begin fetching linked assets (like stylesheets, scripts, or images) earlier, thus improving loading performance. When a server responds with 103 Early Hints, it sends preliminary headers that indicate which resources the client should begin loading while the main response is still being processed.

HTTP Status Code 102 refers to Processing. It is part of the WebDAV extension to HTTP and indicates that the server has received and is processing the request but has not yet completed it.

This status code helps prevent client timeouts, especially with complex or lengthy requests involving multiple operations. By sending 102 Processing, the server informs the client that it’s still working on the request, ensuring the client knows to wait without assuming a failure due to lack of immediate response.

HTTP Status Code 101 refers to Switching Protocols. This status code indicates that the server understands and agrees to change the protocol being used, based on a request from the client.

HTTP Status Code 100 refers to Continue. This informational code indicates that the initial part of a request has been received, and the client should proceed with sending the rest if there is more data to transmit. This is especially useful for large request bodies, commonly used with POST or PUT requests.

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