Also handle uname on jruby, windows, bsd.

And add RUBY_ENGINE to the reported information if it exists.

lib/stripe.rb

@@ -2,6 +2,7 @@
 # API spec at https://stripe.com/docs/api
 require 'cgi'
 require 'openssl'
+require 'rbconfig'
 require 'set'
 require 'socket'
 
@@ -160,6 +161,7 @@ module Stripe
       :lang => 'ruby',
       :lang_version => lang_version,
       :platform => RUBY_PLATFORM,
+      :engine => defined?(RUBY_ENGINE) ? RUBY_ENGINE : '',
       :publisher => 'stripe',
       :uname => @uname,
       :hostname => Socket.gethostname,
@@ -168,17 +170,33 @@ module Stripe
   end
 
   def self.get_uname
-    begin
+    if File.exist?('/proc/version')
       File.read('/proc/version').strip
-    rescue SystemCallError
-      begin
-        `uname -a 2>/dev/null`.strip if RUBY_PLATFORM =~ /linux|darwin/i
-      rescue Errno::ENOMEM # couldn't create subprocess
-        "uname lookup failed"
+    else
+      case RbConfig::CONFIG['host_os']
+      when /linux|darwin|bsd|sunos|solaris|cygwin/i
+        _uname_uname
+      when /mswin|mingw/i
+        _uname_ver
+      else
+        "unknown platform"
       end
     end
   end
 
+  def self._uname_uname
+    (`uname -a 2>/dev/null` || '').strip
+  rescue Errno::ENOMEM
+    "uname lookup failed"
+  end
+
+  def self._uname_ver
+    (`ver` || '').strip
+  rescue Errno::ENOMEM
+    "uname lookup failed"
+  end
+
+
   def self.uri_encode(params)
     Util.flatten_params(params).
       map { |k,v| "#{k}=#{Util.url_encode(v)}" }.join('&')