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HTTP 1xx Informational Status Codes/HTTP 101 Switching Protocols

Server is switching protocols

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Section: HTTP 1xx Informational Status Codes

HTTP 101 Switching Protocols

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curl -i -N -H 'Connection: Upgrade' -H 'Upgrade: websocket' https://example.com/socket
Explanation

Used when a client requests a protocol switch, such as upgrading to WebSocket.

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Same sheet · prioritizing HTTP 1xx Informational Status Codes
HTTP 100 Continue
Client may continue request body
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HTTP 102 Processing
Server has received and is processing
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HTTP 103 Early Hints
Preliminary headers before the final response
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