Add ALPN (Application-Layer Protocol Negotiation) support for TLS 1.3#27
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Implement RFC 7301 ALPN extension for both client and server handshakes, enabling protocol negotiation (e.g., h2, http/1.1) during the TLS handshake. The server uses server-preference ordering when selecting a protocol and returns TlsNoApplicationProtocol when no common protocol exists. The negotiated protocol is exposed on the Connection object via the alpn_protocol field.
Contributor
Author
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Without having the HTTP ALPN protocols some of the top 100 sites just closed the connection. |
Owner
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Nice. Thanks. Do you have some of the domains which fail without ALPN. |
Contributor
Author
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You can find them by looking at the failed GitHub action that ran top_sites |
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Implement RFC 7301 ALPN extension for both client and server handshakes,
enabling protocol negotiation (e.g., h2, http/1.1) during the TLS
handshake. The server uses server-preference ordering when selecting a
protocol and returns TlsNoApplicationProtocol when no common protocol
exists. The negotiated protocol is exposed on the Connection object via
the alpn_protocol field.