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#! perl # mandatory depends=tcp |
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|
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# websocket protocol server (RFC6455), actually only the handshake part |
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# the framing is implemented in socket/lowlevel.C |
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# this implementations doesn't even try to completely implement th RFC, |
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# it tries only to be good enough. |
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|
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use Digest::SHA1 (); |
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|
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# websocket requests can be very long, and we want the tcp code to buffer for us |
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our $detector = ext::tcp::register websocket => 4096, sub { |
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m{^(?i:GET) \ (?i:http://[^/]+)? /ws \ (?:(?i)HTTP/[0-9\.]+).*\015\012\015\012}xs |
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}, sub { |
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my ($id, $fh, $buf) = @_; |
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|
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$buf =~ /^Sec-WebSocket-Version\s*:\s*([0-9]+)/mi |
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or return; |
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my $version = $1; # 8=ff10, 13=rfc |
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|
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$buf =~ /^Sec-WebSocket-Key\s*:\s*(\S+)/mi |
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or return; |
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my $key = $1; |
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|
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if ($version != 8 && $version != 13) { |
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syswrite $fh, "HTTP/1.1 400 version mismatch\015\012" |
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. "connection: close\015\012" |
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. "sec-websocket-version: 13, 8\015\012\015\012"; |
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return; |
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} |
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|
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my $res = "HTTP/1.1 101 upgrading\015\012" |
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. "connection: upgrade\015\012" |
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. "upgrade: websocket\015\012" |
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. "sec-websocket-accept: " . (Digest::SHA1::sha1_base64 $key . "258EAFA5-E914-47DA-95CA-C5AB0DC85B11") . "=\015\012" |
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. "\015\012"; |
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|
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syswrite $fh, $res; |
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|
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my $ns = cf::client::create fileno $_[1], $_[0]; |
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$ns->ws_version ($version); |
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$ns->run; |
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}; |
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