258eafa5-e914-47da-95ca-c5ab0dc85b11
Seen in rfc6455

Seen in rfc6455

Seen in RFC 6455
Counts : rfc6455:2
Seen 2 times in more than 1 page, showing only the first.
RFC 6455                 The WebSocket Protocol            December 2011


   Concretely, if as in the example above, the |Sec-WebSocket-Key|
   header field had the value "dGhlIHNhbXBsZSBub25jZQ==", the server
   would concatenate the string "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
   to form the string "dGhlIHNhbXBsZSBub25jZQ==258EAFA5-E914-47DA-95CA-
   C5AB0DC85B11".  The server would then take the SHA-1 hash of this,
   giving the value 0xb3 0x7a 0x4f 0x2c 0xc0 0x62 0x4f 0x16 0x90 0xf6
   0x46 0x06 0xcf 0x38 0x59 0x45 0xb2 0xbe 0xc4 0xea.  This value is
   then base64-encoded (see Section 4 of [RFC4648]), to give the value
   "s3pPLMBiTxaQ9kYGzzhZRbK+xOo=".  This value would then be echoed in
   the |Sec-WebSocket-Accept| header field.

   The handshake from the server is much simpler than the client
   handshake.  The first line is an HTTP Status-Line, with the status
   code 101:

        HTTP/1.1 101 Switching Protocols

   Any status code other than 101 indicates that the WebSocket handshake
   has not completed and that the semantics of HTTP still apply.  The
   headers follow the status code.

   The |Connection| and |Upgrade| header fields complete the HTTP
   Upgrade.  The |Sec-WebSocket-Accept| header field indicates whether
   the server is willing to accept the connection.  If present, this
   header field must include a hash of the client's nonce sent in
   |Sec-WebSocket-Key| along with a predefined GUID.  Any other value
   must not be interpreted as an acceptance of the connection by the
   server.

        HTTP/1.1 101 Switching Protocols
        Upgrade: websocket
        Connection: Upgrade
        Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=

   These fields are checked by the WebSocket client for scripted pages.
   If the |Sec-WebSocket-Accept| value does not match the expected
   value, if the header field is missing, or if the HTTP status code is
   not 101, the connection will not be established, and WebSocket frames
   will not be sent.

   Option fields can also be included.  In this version of the protocol,
   the main option field is |Sec-WebSocket-Protocol|, which indicates
   the subprotocol that the server has selected.  WebSocket clients
   verify that the server included one of the values that was specified
   in the WebSocket client's handshake.  A server that speaks multiple
   subprotocols has to make sure it selects one based on the client's
   handshake and specifies it in its handshake.




Fette & Melnikov             Standards Track                    [Page 8]
-1 RFC regex push