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Status: 425

425 Too Early

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The HTTP 425 Too Early client error response status code indicates that the server was unwilling to risk processing a request that might be replayed to avoid potential replay attacks.

If a client has interacted with a server recently, early data (also known as zero round-trip time (0-RTT) data) allows the client to send data to a server in the first round trip of a connection, without waiting for the TLS handshake to complete. A client that sends a request in early data does not need to include the Early-Data header. See Early-Data for more information.

Status

425 Too Early

Specifications

Specification
Using Early Data in HTTP>
# status>

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Opera Safari Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet WebView Android WebView on iOS
425 No No 58 No No No 58 No No No No No

See also

  • HTTP response status codes
  • TLS
  • Early-Data

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https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Status/425

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