3 files changed, 103 insertions, 44 deletions
diff --git a/sample/dualstack-fetch.rb b/sample/dualstack-fetch.rb
new file mode 100644
index 0000000000..ab8d0914f2
--- /dev/null
+++ b/sample/dualstack-fetch.rb
@@ -0,0 +1,48 @@
+# simple webpage fetcher
+
+# The code demonstrates how a multi-protocol client should be written.
+# TCPsocket is using getaddrinfo() internally, so there should be no problem.
+
+require "socket"
+
+if ARGV.size != 1
+  STDERR.print "requires URL\n"
+  exit
+end
+
+url = ARGV[0]
+if url !~ /^http:\/\/([^\/]+)(\/.*)$/
+  STDERR.print "only http with full hostname is supported\n"
+  exit
+end
+
+# split URL into host, port and path
+hostport = $1
+path = $2
+if (hostport =~ /^(.*):([0-9]+)$/)
+  host = $1
+  port = $2
+else
+  host = hostport
+  port = 80
+end
+if host =~ /^\[(.*)\]$/
+  host = $1
+end
+
+#STDERR.print "url=<#{ARGV[0]}>\n"
+#STDERR.print "host=<#{host}>\n"
+#STDERR.print "port=<#{port}>\n"
+#STDERR.print "path=<#{path}>\n"
+
+STDERR.print "conntecting to #{host} port #{port}\n"
+c = TCPsocket.new(host, port)
+dest = Socket.getnameinfo(c.getpeername,
+		Socket::NI_NUMERICHOST|Socket::NI_NUMERICSERV)
+STDERR.print "conntected to #{dest[0]} port #{dest[1]}\n"
+c.print "GET #{path} HTTP/1.0\n"
+c.print "Host: #{host}\n"
+c.print "\n"
+while c.gets
+  print
+end
diff --git a/sample/dualstack-httpd.rb b/sample/dualstack-httpd.rb
new file mode 100644
index 0000000000..893b29feba
--- /dev/null
+++ b/sample/dualstack-httpd.rb
@@ -0,0 +1,55 @@
+# simple httpd
+
+# The code demonstrates how a multi-protocol daemon should be written.
+
+require "socket"
+require "thread"
+
+port = 8888
+res = Socket.getaddrinfo(nil, port, nil, Socket::SOCK_STREAM, nil, Socket::AI_PASSIVE)
+sockpool = []
+names = []
+threads = []
+
+res.each do |i|
+  s = TCPserver.new(i[3], i[1])
+  n = Socket.getnameinfo(s.getsockname, Socket::NI_NUMERICHOST|Socket::NI_NUMERICSERV).join(" port ")
+  sockpool.push s
+  names.push n
+end
+
+(0 .. sockpool.size - 1).each do |i|
+  mysock = sockpool[i]
+  myname = names[i]
+  STDERR.print "socket #{mysock} started, address #{myname}\n"
+  threads[i] = Thread.start do		# Thread.start cannot be used here!
+    ls = mysock	# copy to dynamic variable
+    t = Thread.current
+    STDERR.print "socket #{myname} listener started, pid #{$$} thread #{t}\n"
+    while TRUE
+      as = ls.accept
+      Thread.start do
+	STDERR.print "socket #{myname} accepted, thread ", Thread.current, "\n"
+	s = as	# copy to dynamic variable
+	str = ''
+	while line = s.gets
+	  break if line == "\r\n" or line == "\n"
+	  str << line
+	end
+	STDERR.print "socket #{myname} got string\n"
+	s.write("HTTP/1.0 200 OK\n")
+	s.write("Content-type: text/plain\n\n")
+	s.write("this is test: my name is #{myname}, you sent:\n")
+	s.write("---start\n")
+	s.write(str)
+	s.write("---end\n")
+	s.close
+	STDERR.print "socket #{myname} processed, thread ", Thread.current, " terminating\n"
+      end
+    end
+  end
+end
+
+for t in threads
+  t.join
+end
diff --git a/sample/io.rb b/sample/io.rb
deleted file mode 100644
index 0b38d2112d..0000000000
--- a/sample/io.rb
+++ /dev/null
@@ -1,44 +0,0 @@
-# IO test
-# usage: ruby io.rb file..
-
-home = ENV["HOME"]
-home.sub("m", "&&")
-print(home, "\n")
-print(home.reverse, "\n")
-
-if File.s("io.rb")
-  print(File.s("io.rb"), ": io.rb\n")
-end
-
-$/="f\n"
-for i in "abc\n\ndef\nghi\n"
-  print("tt: ", i)
-end
-
-printf("%s:(%d)%s\n", $0, ARGV.length, ARGV[0])
-passwd = open(ARGV[0], "r")
-#printf("%s", passwd.find{i|i =~ /\*/})
-
-n = 1
-for i in passwd #.grep(/^\*/)
-  printf("%6d: %s", n, i)
-  n = n + 1;
-end
-
-fp = open("|-", "r")
-
-if fp == nil
-  for i in 1..5
-    print(i, "\n")
-  end
-else
-  for line in fp
-    print(line)
-  end
-end
-
-def printUsage()
-  if $USAGE
-    apply($USAGE);
-  end
-end