TriggerFullFrameSnapshot hangs on broken connection

[janick]

Please answer these questions before submitting your issue. Thanks!

What version of Python are you using (python -V)?

Python 2.7.10

What operating system and processor architecture are you using (python -c 'import platform; print(platform.uname());')?

('Darwin', 'Janicks-MacBook-Air.local', '18.2.0', 'Darwin Kernel Version 18.2.0: Mon Nov 12 20:24:46 PST 2018; root:xnu-4903.231.4~2/RELEASE_X86_64', 'x86_64', 'i386')

Which Python packages do you have installed (run the pip freeze or pip3 freeze command and paste output)?

altgraph==0.10.2
aniso8601==1.2.0
argcomplete==1.9.2
arlo==1.2.4
asn1crypto==0.24.0
base58==0.2.4
bdist-mpkg==0.5.0
bonjour-py==0.3
boto3==1.5.4
botocore==1.8.18
certifi==2017.11.5
cffi==1.11.2
chardet==3.0.4
click==6.7
cryptography==2.1.4
docutils==0.14
durationpy==0.5
enum34==1.1.6
Flask==0.12.1
Flask-Ask==0.9.7
future==0.16.0
futures==3.1.1
hjson==3.0.1
idna==2.6
ipaddress==1.0.19
itsdangerous==0.24
Jinja2==2.10
jmespath==0.9.3
kappa==0.6.0
lambda-packages==0.19.0
macholib==1.5.1
MarkupSafe==1.0
matplotlib==1.3.1
modulegraph==0.10.4
monotonic==1.5
numpy==1.8.0rc1
placebo==0.8.1
py2app==0.7.3
pycparser==2.18
pyobjc-core==2.5.1
pyobjc-framework-Accounts==2.5.1
pyobjc-framework-AddressBook==2.5.1
pyobjc-framework-AppleScriptKit==2.5.1
pyobjc-framework-AppleScriptObjC==2.5.1
pyobjc-framework-Automator==2.5.1
pyobjc-framework-CFNetwork==2.5.1
pyobjc-framework-Cocoa==2.5.1
pyobjc-framework-Collaboration==2.5.1
pyobjc-framework-CoreData==2.5.1
pyobjc-framework-CoreLocation==2.5.1
pyobjc-framework-CoreText==2.5.1
pyobjc-framework-DictionaryServices==2.5.1
pyobjc-framework-EventKit==2.5.1
pyobjc-framework-ExceptionHandling==2.5.1
pyobjc-framework-FSEvents==2.5.1
pyobjc-framework-InputMethodKit==2.5.1
pyobjc-framework-InstallerPlugins==2.5.1
pyobjc-framework-InstantMessage==2.5.1
pyobjc-framework-LatentSemanticMapping==2.5.1
pyobjc-framework-LaunchServices==2.5.1
pyobjc-framework-Message==2.5.1
pyobjc-framework-OpenDirectory==2.5.1
pyobjc-framework-PreferencePanes==2.5.1
pyobjc-framework-PubSub==2.5.1
pyobjc-framework-QTKit==2.5.1
pyobjc-framework-Quartz==2.5.1
pyobjc-framework-ScreenSaver==2.5.1
pyobjc-framework-ScriptingBridge==2.5.1
pyobjc-framework-SearchKit==2.5.1
pyobjc-framework-ServiceManagement==2.5.1
pyobjc-framework-Social==2.5.1
pyobjc-framework-SyncServices==2.5.1
pyobjc-framework-SystemConfiguration==2.5.1
pyobjc-framework-WebKit==2.5.1
pyOpenSSL==17.0.0
pyparsing==2.0.1
PySocks==1.6.8
python-dateutil==2.6.1
python-slugify==1.2.4
pytz==2013.7
PyYAML==3.12
requests==2.18.4
s3transfer==0.1.12
scipy==0.13.0b1
six==1.11.0
sseclient==0.0.22
toml==0.9.4
tqdm==4.19.1
Unidecode==0.4.21
urllib3==1.22
virtualenv==15.1.0
Werkzeug==0.12
xattr==0.6.4

Which Arlo hardware do you have (camera types - [Arlo, Pro, Q, etc.], basestation model, etc.)?

Alro Pro

What did you do?

I'm using one of my Arlo camera to shoot a timelapse video, using a script inspired by https://github.com/Notalifeform/arlo-timelapse-lambda. It runs fine for a while, then will eventually issue this error message and hang:

Taking snapshot...
retrieving and storing  snapshots/snapshot-20190109-165848.jpg
Waiting for 4 secs...
Taking snapshot...
retrieving and storing  snapshots/snapshot-20190109-165857.jpg
Waiting for 4 secs...
Taking snapshot...
('Connection broken: IncompleteRead(0 bytes read)', IncompleteRead(0 bytes read))

Here's the entire script:

from datetime import datetime
from datetime import timedelta
#from urllib.request import urlopen                                                                                                                   
from Arlo import Arlo
from pprint import pprint
import time
import subprocess

# Instantiating the Arlo object automatically calls Login(), which returns an oAuth token that gets cached.                                           
# Subsequent successful calls to login will update the oAuth token.                                                                                   
arlo = Arlo(userid, password)

# Get the list of devices and filter on device type to only get the basestation.                                                                      
# This will return an array which includes all of the basestation's associated metadata.                                                   
basestations = arlo.GetDevices('basestation')

# Get the list of devices and filter on device type to only get the camera.                                                                           
# This will return an array which includes all of the camera's associated metadata.                                                                   
cameras = arlo.GetDevices('camera')
#print("CAMERA: {}".format(cameras))                                                                                                                  

# Pick the camera we want                                                                                                                             
camera = None
for cam in cameras:
    if (cam['deviceName'] == 'Workbench'):
        camera = cam
        break

#                                                                                                                                                     
# Prevent MacOS from sleeping                                                                                                                         
#                                                                                                                                                     
subprocess.Popen('caffeinate')

#                                                                                                                                                     
# Keep taking snapshots until interrupted                                                                                                             
#                                                                                                                                                     
interval = timedelta(seconds=10)
while (1):
    try:
        now = datetime.now()

        # Tells the Arlo basestation to trigger a snapshot on the given camera.                                                                       
        # This snapshot is not instantaneous, so this method waits for the response and returns the url                                               
        # for the snapshot, which is stored on the Amazon AWS servers.                                                                                
        print('Taking snapshot...')
        snapshot_url = arlo.TriggerFullFrameSnapshot(basestations[0], camera)

        # This method requests the snapshot for the given url and writes the image data to the location specified.                                                                 
        # Note: Snapshots are in .jpg format.                                                                                                         
        tag = now.strftime('%Y%m%d-%H%M%S')
        filename = 'snapshots/snapshot-{}.jpg'.format(tag)

        print('retrieving and storing  {}'.format(filename))
        arlo.DownloadSnapshot(snapshot_url, filename)

        # Wait until time for next snapshot                                                                                                           
        then = now + interval;
        now = datetime.now();
        if (now < then):
            delta = then - now;
            print('Waiting for {} secs...'.format(delta.seconds))
            time.sleep(delta.seconds)

    except:
        print("Retrying....")

What did you expect to see?

I don't mind a failure. A hang, on the other hand....

What did you see instead?

A hang I can't easily recover from.

Does this issue reproduce with the latest release?

Yes.

[jeffreydwalter]

Hello, thanks for the report. This is a known issue with the Arlo API. Their system fails to return the response to the EventStream frequently.

This issue has been raised in #93 and #95

I've been slammed with other priorities, but will be committing a fix within the next few days.

[jeffreydwalter]

@janick just pushed a fix for this issue. Please give it a try when you can and let me know how it goes. Thanks!

[jeffreydwalter]

@janick did you ever get a chance to try my fix for this issue? I'd appreciate any feedback you have. Thanks.

[janick]

I have not because I do not have a need to make another timelapse video. I appreciate the fix and will try it next time.