Added examples for an SSL client and server. (#68)

Author: postmodern

examples/ssl/cert.crt

@@ -0,0 +1,29 @@
+-----BEGIN CERTIFICATE-----
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+wUaVIUMR7tbVLe6RGgXlVcU=
+-----END CERTIFICATE-----

examples/ssl/client.rb

@@ -0,0 +1,19 @@
+#!/usr/bin/env ruby
+
+require 'async'
+require 'async/io'
+require 'async/io/stream'
+
+endpoint = Async::IO::Endpoint.ssl('localhost',5678)
+
+Async do |async|
+	endpoint.connect do |socket|
+		stream = Async::IO::Stream.new(socket)
+
+		(1..).each do |i|
+			stream.puts "test #{i}"
+			puts stream.gets
+			sleep 1
+		end
+	end
+end

examples/ssl/key.pem

@@ -0,0 +1,51 @@
+-----BEGIN RSA PRIVATE KEY-----
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+-----END RSA PRIVATE KEY-----

examples/ssl/server.rb

@@ -0,0 +1,25 @@
+#!/usr/bin/env ruby
+
+require 'async'
+require 'async/io'
+require 'async/io/stream'
+
+key_file = File.join(__dir__,'key.pem')
+cert_file = File.join(__dir__,'cert.crt')
+
+ssl_context = OpenSSL::SSL::SSLContext.new
+ssl_context.key = OpenSSL::PKey::RSA.new(File.read(key_file))
+ssl_context.cert = OpenSSL::X509::Certificate.new(File.read(cert_file))
+
+endpoint = Async::IO::Endpoint.ssl('localhost',5678, ssl_context: ssl_context)
+
+Async do |async|
+	endpoint.accept do |peer|
+		stream = Async::IO::Stream.new(peer)
+
+		while line = stream.gets
+			puts "received: #{line}"
+			stream.puts "you sent: #{line}"
+		end
+	end
+end