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web_streaming.py
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web_streaming.py
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from http import server
from threading import Condition
import base64
import io
import logging
import os
import picamera
import socketserver
# Parameters
AUTH_USERNAME = os.environ.get('AUTH_USERNAME', 'pi')
AUTH_PASSWORD = os.environ.get('AUTH_PASSWORD', 'picamera')
AUTH_BASE64 = base64.b64encode('{}:{}'.format(
AUTH_USERNAME, AUTH_PASSWORD).encode('utf-8'))
BASIC_AUTH = 'Basic {}'.format(AUTH_BASE64.decode('utf-8'))
RESOLUTION = os.environ.get('RESOLUTION', '800x600').split('x')
RESOLUTION_X = int(RESOLUTION[0])
RESOLUTION_Y = int(RESOLUTION[1])
FRAMERATE = int(os.environ.get('FRAMERATE', '24'))
ROTATION = int(os.environ.get('ROTATE', 0))
HFLIP = os.environ.get('HFLIP', 'false').lower() == 'true'
VFLIP = os.environ.get('VFLIP', 'false').lower() == 'true'
PAGE = """\
<html>
<head>
<title>picamera MJPEG streaming demo</title>
</head>
<body>
<h1>PiCamera MJPEG Streaming Demo</h1>
<img src="stream.mjpg" width="{}" height="{}" />
</body>
</html>
""".format(RESOLUTION_X, RESOLUTION_Y)
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):
self.authorized_get()
def authorized_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('Access-Control-Allow-Origin', '*')
self.send_header('Access-Control-Allow-Headers','authorization'),
self.send_header('Access-Control-Allow-Methods','HEAD, GET, POST, PUT, PATCH, DELETE')
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('Access-Control-Allow-Origin', '*')
self.send_header('Access-Control-Allow-Headers','authorization'),
self.send_header('Access-Control-Allow-Methods','HEAD, GET, POST, PUT, PATCH, DELETE')
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
if __name__ == '__main__':
res = '{}x{}'.format(RESOLUTION_X, RESOLUTION_Y)
with picamera.PiCamera(resolution=res, framerate=FRAMERATE) as camera:
output = StreamingOutput()
camera.hflip = HFLIP
camera.vflip = VFLIP
camera.rotation = ROTATION
camera.start_recording(output, format='mjpeg')
try:
address = ('', 8000)
server = StreamingServer(address, StreamingHandler)
server.serve_forever()
finally:
camera.stop_recording()