old_contents: """Basic http server for tests to simulate PyPI or custom indexes
  """
  import urllib2
  from threading import Thread
  from BaseHTTPServer import HTTPServer
  from SimpleHTTPServer import SimpleHTTPRequestHandler
  
  class IndexServer(HTTPServer):
      """Basic single-threaded http server simulating a package index
  
      You can use this server in unittest like this::
          s = IndexServer()
          s.start()
          index_url = s.base_url() + 'mytestindex'
          # do some test requests to the index
          # The index files should be located in setuptools/tests/indexes
          s.stop()
      """
      def __init__(self):
          HTTPServer.__init__(self, ('', 0), SimpleHTTPRequestHandler)
          self._run = True
  
      def serve(self):
          while True:
              self.handle_request()
              if not self._run: break
  
      def start(self):
          self.thread = Thread(target=self.serve)
          self.thread.start()
  
      def stop(self):
          """self.shutdown is not supported on python < 2.6"""
          self._run = False
          urllib2.urlopen('http://127.0.0.1:%s/' % self.server_port)
          self.thread.join()
  
      def base_url(self):
          port = self.server_port
          return 'http://127.0.0.1:%s/setuptools/tests/indexes/' % port
  
new_contents: """Basic http server for tests to simulate PyPI or custom indexes
  """
  import urllib2
  from threading import Thread
  from BaseHTTPServer import HTTPServer
  from SimpleHTTPServer import SimpleHTTPRequestHandler
  
  class IndexServer(HTTPServer):
      """Basic single-threaded http server simulating a package index
  
      You can use this server in unittest like this::
          s = IndexServer()
          s.start()
          index_url = s.base_url() + 'mytestindex'
          # do some test requests to the index
          # The index files should be located in setuptools/tests/indexes
          s.stop()
      """
      def __init__(self):
          HTTPServer.__init__(self, ('', 0), SimpleHTTPRequestHandler)
          self._run = True
  
      def serve(self):
          while True:
              self.handle_request()
              if not self._run: break
  
      def start(self):
          self.thread = Thread(target=self.serve)
          self.thread.start()
  
      def stop(self):
          """self.shutdown is not supported on python < 2.6"""
          self._run = False
          try:
              urllib2.urlopen('http://127.0.0.1:%s/' % self.server_port, None, 5)
          except urllib2.URLError:
              pass
          self.thread.join()
  
      def base_url(self):
          port = self.server_port
          return 'http://127.0.0.1:%s/setuptools/tests/indexes/' % port
  
subject: Fix race condition with the http server used in unittests