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1XX Informational Responses

About

These are HTTP response status code that provide information, and are called informational response status codes.

They signal that the request was received, continuing process1.

List2

There are 4 Informational responses ranging between 100 and 199:

  • 100 Continue - An interim response which indicates that the client should continue the request or ignore the response if the request is already finished
  • 101 Switching Protocols - The code is sent in response to an Upgrade request header from the client and indicates the protocol the server is switching to
  • 102 Processing - It was used with WebDAV contexts to indicate that a request has been received by the server, but no status was available at the time of the response
  • 103 Early Hints - Primarily intended to be used with the Link header, letting the user agent start preloading resources while the server prepares a response or preconnect to an origin from which the page will need resources

Anki

References


  1. Wikipedia. “HTTP”. Available at: https://en.wikipedia.org/wiki/HTTP. (Accessed: [2025-05-23 Fri 02:15]). ↩︎

  2. Mozilla Developer Network. “HTTP”. Available at: https://developer.mozilla.org/en-US/docs/Web/HTTP. (Accessed: [2025-05-06 Tue 16:07]). ↩︎

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