webrick: do not hang acceptor on slow TLS connections
OpenSSL::SSL::SSLSocket#accept may block indefinitely on clients
which negotiate the TCP connection, but fail (or are slow) to
negotiate the subsequent TLS handshake. This prevents the
multi-threaded WEBrick server from accepting other connections.
Since the TLS handshake (via OpenSSL::SSL::SSLSocket#accept)
consists of normal read/write traffic over TCP, handle it in the
per-client thread, instead.
Furthermore, using non-blocking accept() is useful for non-TLS
sockets anyways because spurious wakeups are possible from
select(2).
* lib/webrick/server.rb (accept_client): use TCPServer#accept_nonblock
and remove OpenSSL::SSL::SSLSocket#accept call
* lib/webrick/server.rb (start_thread): call OpenSSL::SSL::SSLSocket#accept
* test/webrick/test_ssl_server.rb (test_slow_connect): new test
[ruby-core:83221] [Bug #14005]
webrick: fix up r60172
By making the socket non-blocking in r60172, TLS/SSL negotiation
via the SSL_accept function must handle non-blocking sockets
properly and retry on SSL_ERROR_WANT_READ/SSL_ERROR_WANT_WRITE.
OpenSSL::SSL::SSLSocket#accept cannot do that properly with a
non-blocking socket, so it must use non-blocking logic of
OpenSSL::SSL::SSLSocket#accept_nonblock.
Thanks to MSP-Greg (Greg L) for finding this.
* lib/webrick/server.rb (start_thread): use SSL_accept properly
with non-blocking socket.
[Bug #14013] [Bug #14005]
webrick: fix up r60172 and revert r60189
Thanks to MSP-Greg (Greg L) for helping with this.
* lib/webrick/server.rb (start_thread): ignore ECONNRESET, ECONNABORTED,
EPROTO, and EINVAL on TLS negotiation errors the same way they
were ignored before r60172 in the accept_client method of the
main acceptor thread.
[Bug #14013] [Bug #14005]
webrick: fix up r60172 and r60208
Thanks to MSP-Greg (Greg L) for helping with this.
* lib/webrick/server.rb (start_thread): fix non-local return
introduced in r60208
webrick: fix up r60172 and r60210
Thanks to MSP-Greg (Greg L) for helping with this.
* lib/webrick/server.rb (start_thread): properly fix non-local return
introduced in r60208 and r60210
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@61240 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
