text: import io
  import picamera
  import logging
  import socketserver
  from threading import Condition
  from http import server
  
  PAGE = """\
  <html>
  <head>
  <title>picamera MJPEG streaming demo</title>
  </head>
  <body>
  <h1>PiCamera MJPEG Streaming Demo</h1>
  <img src="stream.mjpg" width="640" height="480" />
  </body>
  </html>
  """
  
  
  class StreamingOutput(object):
      def __init__(self):
          self.frame = None
          self.buffer = io.BytesIO()
          self.condition = Condition()
  
      def write(self, buf):
          if buf.startswith(b"\xff\xd8"):
              # New frame, copy the existing buffer's content and notify all
              # clients it's available
              self.buffer.truncate()
              with self.condition:
                  self.frame = self.buffer.getvalue()
                  self.condition.notify_all()
              self.buffer.seek(0)
          return self.buffer.write(buf)
  
  
  class StreamingHandler(server.BaseHTTPRequestHandler):
      def do_GET(self):
          if self.path == "/":
              self.send_response(301)
              self.send_header("Location", "/index.html")
              self.end_headers()
          elif self.path == "/index.html":
              content = PAGE.encode("utf-8")
              self.send_response(200)
              self.send_header("Content-Type", "text/html")
              self.send_header("Content-Length", len(content))
              self.end_headers()
              self.wfile.write(content)
          elif self.path == "/stream.mjpg":
              self.send_response(200)
              self.send_header("Age", 0)
              self.send_header("Cache-Control", "no-cache, private")
              self.send_header("Pragma", "no-cache")
              self.send_header("Content-Type", "multipart/x-mixed-replace; boundary=FRAME")
              self.end_headers()
              try:
                  while True:
                      with output.condition:
                          output.condition.wait()
                          frame = output.frame
                      self.wfile.write(b"--FRAME\r\n")
                      self.send_header("Content-Type", "image/jpeg")
                      self.send_header("Content-Length", len(frame))
                      self.end_headers()
                      self.wfile.write(frame)
                      self.wfile.write(b"\r\n")
              except Exception as e:
                  logging.warning("Removed streaming client %s: %s", self.client_address, str(e))
          else:
              self.send_error(404)
              self.end_headers()
  
  
  class StreamingServer(socketserver.ThreadingMixIn, server.HTTPServer):
      allow_reuse_address = True
      daemon_threads = True
  
  
  with picamera.PiCamera(resolution="640x480", framerate=24) as camera:
      output = StreamingOutput()
      camera.start_recording(output, format="mjpeg")
      try:
          address = ("", 8000)
          server = StreamingServer(address, StreamingHandler)
          server.serve_forever()
      finally:
          camera.stop_recording()
  