def post(self, request, format=None):
serializer = RecordSerializer(data=request.data,
context={'request': request})
if serializer.is_valid():
# 如果是新网址，会添加一条record
# 如果以前添加过，则不会添加
# 所以保证了之后old_url存在
serializer.save()
# 通过old_url获取record
# 不用id获取的原因是，如果条目之前已经存在，serializer.save()中会直接跳出，而获取不到id
old_url = delete_http(request.data['old_url'])
record = Record.objects.get(old_url=old_url)
# 当前域名
domain = get_current_site(request).domain
# 当前域名与tiny_url结合
base = 'http://{0!s}/'.format(domain)
record.tiny_url = urljoin(base, record.tiny_url)
record.old_url = old_url
# 放入返回结果的serializer中
tiny_url_serializer = TinyUrlSerializer(record)
return Response(tiny_url_serializer.data,
status=status.HTTP_201_CREATED)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
def record() :
path = '/home/pi/recorded' # save path
target = Record.objects.get(id = 1)
serializer = RecordSerializer(target, many = False)
state = serializer.data['recording']
# rpi setting
GPIO.setmode(GPIO.BCM)
pir_pin = 7
GPIO.setup(pir_pin, GPIO.IN)
camera = PiCamera()
try:
while state :
target = Record.objects.get(id = 1)
serializer = RecordSerializer(target, many = False)
state = serializer.data['recording']
if GPIO.input(pir_pin): # motion detected
print("motion detected")
# take a video
camera.resolution = [320, 240]
camera.start_preview()
now = datetime.datetime.now()
start_time = time.time()
vid_name = now.strftime('%Y%m%d-%H%M%S')
vid_path = path + '/' + vid_name
h264_vid_path = vid_path + '.h264'
mp4_vid_path = vid_path + '.mp4'
thumbnail_path = path + '/' + vid_name + '.jpg'
camera.start_recording(output=h264_vid_path)
time.sleep(1)
camera.capture(thumbnail_path)
while GPIO.input(pir_pin) :
print("recoring..")
time.sleep(2)
camera.stop_recording()
camera.stop_preview()
result = subprocess.check_output("MP4Box -add {} {}".format(h264_vid_path, mp4_vid_path), shell=True)
print(result)
vid_time = time.strftime("%M:%S", time.gmtime(time.time()-start_time))
# s3 upload
s3 = boto3.client('s3', region_name = 'ap-northeast-2', aws_access_key_id=S3_ACCESS_KEY_ID, aws_secret_access_key=S3_SECRET_ACCESS_KEY)
s3.upload_file(Filename = mp4_vid_path, Bucket = S3_STORAGE_BUCKET_NAME, Key = vid_name + '.mp4')
s3.upload_file(Filename = thumbnail_path, Bucket = S3_STORAGE_BUCKET_NAME, Key = vid_name + '_thumb.jpg')
uploadVideo = {}
uploadVideo['vid_name'] = vid_name
uploadVideo['created'] = now
uploadVideo['vid_time'] = vid_time
uploadVideo['thumb'] = S3_ACCESS_URL + vid_name + '_thumb.jpg'
serializer = VideoSerializer(data = uploadVideo)
serializer.is_valid()
serializer.save()
print(vid_path, "upload success")
os.remove(h264_vid_path)
os.remove(mp4_vid_path)
os.remove(thumbnail_path)
else:
camera.stop_preview()
except KeyboardInterrupt:
print("quit")
GPIO.cleanup()