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Transform and send a base64 image in attachment with FlaskMailMessage

I would like to send an image by email with FlaskMailMessage. But this image is a base64 encoded image.
Here is an example code :
def mail_answer():
msg = "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"
msg = base64.b64decode(msg)
attachment = [
FileStorage(
stream=io.BytesIO(msg),
filename="image01.png",
name="image01.png",
content_type="image/png",
)
]
headers = {"Reply-To": "hello#test.com"}
FlaskMailMessage(
"SO test",
sender="achichi#stackoverflow.com",
recipients=["test#†est.com"],
extra_headers=headers,
attachments=attachments,
)
When I try to execute it I have the following error :
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/threading.py", line 1009, in _bootstrap_inner
self.run()
File "/Users/antoine/Documents/Git/portail/portail/tools/threading.py", line 33, in run
super().run()
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/threading.py", line 946, in run
self._target(*self._args, **self._kwargs)
File "/Users/antoine/Documents/Git/portail/portail/modules/notification/notifications.py", line 83, in _background_notification_handle
manager.mail_users(emailed_users, signal.name, obj)
File "/Users/antoine/Documents/Git/portail/portail/modules/helpdesk/notifications.py", line 360, in mail_users
self.mail_answer(users, ticket)
File "/Users/antoine/Documents/Git/portail/portail/modules/helpdesk/notifications.py", line 465, in mail_answer
mails.send_email(
File "/Users/antoine/Documents/Git/portail/portail/modules/mail/lib.py", line 297, in send_email
return mail.send(msg)
File "/Users/antoine/Documents/Git/portail/venv/lib/python3.10/site-packages/flask_mail.py", line 492, in send
message.send(connection)
File "/Users/antoine/Documents/Git/portail/venv/lib/python3.10/site-packages/flask_mail.py", line 427, in send
connection.send(self)
File "/Users/antoine/Documents/Git/portail/venv/lib/python3.10/site-packages/flask_mail.py", line 190, in send
message.as_bytes() if PY3 else message.as_string(),
File "/Users/antoine/Documents/Git/portail/venv/lib/python3.10/site-packages/flask_mail.py", line 385, in as_bytes
return self._message().as_bytes()
File "/Users/antoine/Documents/Git/portail/venv/lib/python3.10/site-packages/flask_mail.py", line 350, in _message
f.set_payload(attachment.data)
File "/Users/antoine/Documents/Git/portail/venv/lib/python3.10/site-packages/werkzeug/datastructures.py", line 3023, in __getattr__
return getattr(self.stream, name)
AttributeError: '_io.BytesIO' object has no attribute 'data'
FlaskMail attachments are a list[FileStorage], maybe I do not need io.BytesIO(msg) ? But what should I use instead ?

Judging from the Documentation, it's not a FileStorage that's expected,
as the arguments parameter, but rather an Attachment object (can be seen from the source code as well).
So the actual code to attach a file to the message would be :
def mail_answer():
msg = "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"
data_bytes = base64.b64encode(msg)
headers = {"Reply-To": "hello#test.com"}
msg = FlaskMailMessage(
"SO test",
sender="achichi#stackoverflow.com",
recipients=["test#†est.com"],
extra_headers=headers
)
msg.attach("filename.png", "image/png", data_bytes)
# ...

_gdbm.error: Database needs recovery -- after running out of storage while fetching api data

I really don't know how to help myself, being unfamiliar with this kind of error, and not finding anything on the Google landscape really. My last hope is one of you guys since I don't know where else to go with this. I tried reinstalling all libraries and setting up a new venv. For more action I don't trust myself enough in these kinds of things.
The code triggering the error:
from wetterdienst import DWDObservationData
observations_daily = DWDObservationData(
station_ids=station_ids_d,
parameter=params_daily,
time_resolution=TimeResolution.DAILY,
start_date="2015-01-01",
end_date="2020-10-10",
tidy_data=True,
humanize_column_names=True,
)
for df in observations_hourly.collect_data():
name = str(df.STATION_ID.iloc[0]).strip(".0")
df.to_csv('./data/hourly/{}.csv'.format(name))
print('{} done'.format(name))
API is found here: https://github.com/earthobservations/wetterdienst
Error:
Traceback (most recent call last):
File "/Users/sashakaun/PycharmProjects/wetter2.0/main.py", line 83, in <module>
for df in observations_hourly.collect_data():
File "/Users/sashakaun/PycharmProjects/wetter2.0/venv/lib/python3.8/site-packages/wetterdienst/dwd/observations/api.py", line 178, in collect_data
df_parameter = self._collect_parameter_from_station(
File "/Users/sashakaun/PycharmProjects/wetter2.0/venv/lib/python3.8/site-packages/wetterdienst/dwd/observations/api.py", line 243, in _collect_parameter_from_station
df_period = collect_climate_observations_data(
File "/Users/sashakaun/PycharmProjects/wetter2.0/venv/lib/python3.8/site-packages/wetterdienst/dwd/observations/access.py", line 82, in collect_climate_observations_data
filenames_and_files = download_climate_observations_data_parallel(remote_files)
File "/Users/sashakaun/PycharmProjects/wetter2.0/venv/lib/python3.8/site-packages/wetterdienst/dwd/observations/access.py", line 106, in download_climate_observations_data_parallel
return list(zip(remote_files, files_in_bytes))
File "/usr/local/Cellar/python#3.8/3.8.5/Frameworks/Python.framework/Versions/3.8/lib/python3.8/concurrent/futures/_base.py", line 611, in result_iterator
yield fs.pop().result()
File "/usr/local/Cellar/python#3.8/3.8.5/Frameworks/Python.framework/Versions/3.8/lib/python3.8/concurrent/futures/_base.py", line 432, in result
return self.__get_result()
File "/usr/local/Cellar/python#3.8/3.8.5/Frameworks/Python.framework/Versions/3.8/lib/python3.8/concurrent/futures/_base.py", line 388, in __get_result
raise self._exception
File "/usr/local/Cellar/python#3.8/3.8.5/Frameworks/Python.framework/Versions/3.8/lib/python3.8/concurrent/futures/thread.py", line 57, in run
result = self.fn(*self.args, **self.kwargs)
File "/Users/sashakaun/PycharmProjects/wetter2.0/venv/lib/python3.8/site-packages/wetterdienst/dwd/observations/access.py", line 124, in _download_climate_observations_data
return BytesIO(__download_climate_observations_data(remote_file=remote_file))
File "<decorator-gen-2>", line 2, in __download_climate_observations_data
File "/Users/sashakaun/PycharmProjects/wetter2.0/venv/lib/python3.8/site-packages/dogpile/cache/region.py", line 1356, in get_or_create_for_user_func
return self.get_or_create(
File "/Users/sashakaun/PycharmProjects/wetter2.0/venv/lib/python3.8/site-packages/dogpile/cache/region.py", line 954, in get_or_create
with Lock(
File "/Users/sashakaun/PycharmProjects/wetter2.0/venv/lib/python3.8/site-packages/dogpile/lock.py", line 185, in __enter__
return self._enter()
File "/Users/sashakaun/PycharmProjects/wetter2.0/venv/lib/python3.8/site-packages/dogpile/lock.py", line 94, in _enter
generated = self._enter_create(value, createdtime)
File "/Users/sashakaun/PycharmProjects/wetter2.0/venv/lib/python3.8/site-packages/dogpile/lock.py", line 178, in _enter_create
return self.creator()
File "/Users/sashakaun/PycharmProjects/wetter2.0/venv/lib/python3.8/site-packages/dogpile/cache/region.py", line 920, in gen_value
self.backend.set(key, value)
File "/Users/sashakaun/PycharmProjects/wetter2.0/venv/lib/python3.8/site-packages/dogpile/cache/backends/file.py", line 239, in set
dbm[key] = pickle.dumps(value, pickle.HIGHEST_PROTOCOL)
_gdbm.error: Database needs recovery
Thanks a lot!!

A GDBM file has been corrupted. You need to use gdbmtool to recover the database. Install gdbmtool then run
gdbmtool FILENAME
Where FILENAME is the name of the GDBM database. A prompt will appear, then you can enter
gdbmtool> recover summary
If the database can be recovered it will display a summary of the recovery results, eg:
Recovery succeeded.
Keys recovered: 6870650, failed: 5, duplicate: 0
Buckets recovered: 64830, failed: 2

Mongodb and Celery "pymongo.errors.OperationFailure: command createIndexes requires authentication"

I am working Celery with Mongodb( as backend and as a broker).
I follow this tutorial on how to set them up: https://skillachie.com/2013/06/15/intro-celery-and-mongodb/
When I have the security enable on the /etc/mongod.conf file like this:
security:
authorization: enabled
and I call the .get() to get the results of the tasks that I have set up I get this error:
Traceback (most recent call last):
File "/home/celeryProject/celeryProject/lib/python3.6/site-packages/kombu/utils/__init__.py", line 323, in __get__
return obj.__dict__[self.__name__]
KeyError: 'collection'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/celeryProject/celeryProject/lib/python3.6/site-packages/celery/result.py", line 169, in get
no_ack=no_ack,
File "/home/celeryProject/celeryProject/lib/python3.6/site-packages/celery/backends/base.py", line 229, in wait_for
meta = self.get_task_meta(task_id)
File "/home/celeryProject/celeryProject/lib/python3.6/site-packages/celery/backends/base.py", line 307, in get_task_meta
meta = self._get_task_meta_for(task_id)
File "/home/celeryProject/celeryProject/lib/python3.6/site-packages/celery/backends/mongodb.py", line 158, in _get_task_meta_for
obj = self.collection.find_one({'_id': task_id})
File "/home/celeryProject/celeryProject/lib/python3.6/site-packages/kombu/utils/__init__.py", line 325, in __get__
value = obj.__dict__[self.__name__] = self.__get(obj)
File "/home/celeryProject/celeryProject/lib/python3.6/site-packages/celery/backends/mongodb.py", line 246, in collection
collection.ensure_index('date_done', background='true')
File "/home/celeryProject/celeryProject/lib/python3.6/site-packages/pymongo/collection.py", line 2028, in ensure_index
self.__create_index(keys, kwargs, session=None)
File "/home/celeryProject/celeryProject/lib/python3.6/site-packages/pymongo/collection.py", line 1894, in __create_index
session=session)
File "/home/celeryProject/celeryProject/lib/python3.6/site-packages/pymongo/collection.py", line 250, in _command
user_fields=user_fields)
File "/home/celeryProject/celeryProject/lib/python3.6/site-packages/pymongo/pool.py", line 613, in command
user_fields=user_fields)
File "/home/celeryProject/celeryProject/lib/python3.6/site-packages/pymongo/network.py", line 167, in command
parse_write_concern_error=parse_write_concern_error)
File "/home/celeryProject/celeryProject/lib/python3.6/site-packages/pymongo/helpers.py", line 159, in _check_command_response
raise OperationFailure(msg % errmsg, code, response)
pymongo.errors.OperationFailure: command createIndexes requires authentication
But when I disable the security it is working!
I also tried to change the roles on the user on mongodb and nothing happened.
Also, I have tried to log in with that way:
BROKER_URL = 'mongodb://tester:123456#178.128.250.181:27017/test?authSource=admin'
celery = Celery('EOD_TASKS',broker=BROKER_URL)
Is this a security problem or I can ignore it and move on?

if i'm not mistaken, using authorization: enabled means you need to setup a user/pass to login in order to query the mongodb. by default it is left wide open, which is a security consideration

How to connect web2py with mysql on Windows 10

After adding
db = DAL('mysql://admin:admin#localhost/web2py')
I got this errors..
Failure to connect, tried 5 times: Traceback (most recent call last): File "C:\Projects\web2py\gluon\packages\dal\pydal\base.py", line 457, in init self._adapter = adapter(**kwargs) File "C:\Projects\web2py\gluon\packages\dal\pydal\adapters__init__.py", line 39, in call obj = super(AdapterMeta, cls).call(*args, **kwargs) File "C:\Projects\web2py\gluon\packages\dal\pydal\adapters\base.py", line 369, in init super(SQLAdapter, self).init(*args, **kwargs) File "C:\Projects\web2py\gluon\packages\dal\pydal\adapters\base.py", line 53, in init self.reconnect() File "C:\Projects\web2py\gluon\packages\dal\pydal\connection.py", line 154, in reconnect self.connection = self.connector() File "C:\Projects\web2py\gluon\packages\dal\pydal\adapters\mysql.py", line 51, in connector return self.driver.connect(**self.driver_args) File "MySQLdb/init.py", line 81, in Connect File "MySQLdb/connections.py", line 193, in init TypeError: 'password' is an invalid keyword argument for this function
I have installed mysql, mysql-connector for python, mysql-client, python2.7 and so on
db = DAL('mysql://admin:admin#localhost/web2py')
I expecting this will be connect but not 😒😒😒

Try something like this
uri = mysql://user:password#host/databasename
And also, use Python 3 goodluck :)))

ParallelSSH - SessionHandshakeError when using pssh2_client

Using parallel-ssh module I'm trying to run SSH commands using Natinve Client but getting SessionHandshakeError. And if I use Paramiko Client instead, everything works fine. I met the requirement of my_pkey.pub being in the same directory as my_pkey.
Here is my code which uses Native Client (changed real IPs to 'ip1' and 'ip2'):
from pssh.pssh2_client import ParallelSSHClient
pkey = os.path.dirname(os.path.abspath(__file__)) + '/my_pkey'
hosts = ['ip1', 'ip2']
client = ParallelSSHClient(hosts, user='root', pkey=pkey)
output = client.run_command('hostname')
for host, host_output in output.items():
for line in host_output.stdout:
print(line)
Getting this error:
Traceback (most recent call last):
File "C:\Program Files (x86)\Python36-32\lib\site-packages\pssh\ssh2_client.py", line 123, in _init
self.session.handshake(self.sock)
File "ssh2\session.pyx", line 81, in ssh2.session.Session.handshake
ssh2.exceptions.SessionHandshakeError: ('SSH session handshake failed with error code %s', -5)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Program Files (x86)\Python36-32\lib\site-packages\pssh\ssh2_client.py", line 123, in _init
self.session.handshake(self.sock)
File "ssh2\session.pyx", line 81, in ssh2.session.Session.handshake
ssh2.exceptions.SessionHandshakeError: ('SSH session handshake failed with error code %s', -5)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Program Files (x86)\Python36-32\lib\site-packages\pssh\ssh2_client.py", line 123, in _init
self.session.handshake(self.sock)
File "ssh2\session.pyx", line 81, in ssh2.session.Session.handshake
ssh2.exceptions.SessionHandshakeError: ('SSH session handshake failed with error code %s', -5)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:/Users/NazimokPP/Desktop/AnchorFree/QA-Automation/nodetest/nodetest.py", line 57, in <module>
main(args.server_domain, args.test_type)
File "C:/Users/NazimokPP/Desktop/AnchorFree/QA-Automation/nodetest/nodetest.py", line 45, in main
output = client.run_command('hostname')
File "C:\Program Files (x86)\Python36-32\lib\site-packages\pssh\pssh2_client.py", line 182, in run_command
encoding=encoding, use_pty=use_pty, timeout=timeout)
File "C:\Program Files (x86)\Python36-32\lib\site-packages\pssh\base_pssh.py", line 91, in run_command
self.get_output(cmd, output)
File "C:\Program Files (x86)\Python36-32\lib\site-packages\pssh\base_pssh.py", line 136, in get_output
(channel, host, stdout, stderr, stdin) = cmd.get()
File "C:\Program Files (x86)\Python36-32\lib\site-packages\gevent\greenlet.py", line 482, in get
self._raise_exception()
File "C:\Program Files (x86)\Python36-32\lib\site-packages\gevent\greenlet.py", line 159, in _raise_exception
reraise(*self.exc_info)
File "C:\Program Files (x86)\Python36-32\lib\site-packages\gevent\_compat.py", line 33, in reraise
raise value.with_traceback(tb)
File "C:\Program Files (x86)\Python36-32\lib\site-packages\gevent\greenlet.py", line 536, in run
result = self._run(*self.args, **self.kwargs)
File "C:\Program Files (x86)\Python36-32\lib\site-packages\pssh\pssh2_client.py", line 188, in _run_command
self._make_ssh_client(host)
File "C:\Program Files (x86)\Python36-32\lib\site-packages\pssh\pssh2_client.py", line 313, in _make_ssh_client
allow_agent=self.allow_agent, retry_delay=self.retry_delay)
File "C:\Program Files (x86)\Python36-32\lib\site-packages\pssh\ssh2_client.py", line 107, in __init__
THREAD_POOL.apply(self._init)
File "C:\Program Files (x86)\Python36-32\lib\site-packages\gevent\pool.py", line 325, in apply
return self.spawn(func, *args, **kwds).get()
File "C:\Program Files (x86)\Python36-32\lib\site-packages\gevent\event.py", line 385, in get
return self.get(block=False)
File "C:\Program Files (x86)\Python36-32\lib\site-packages\gevent\event.py", line 375, in get
return self._raise_exception()
File "C:\Program Files (x86)\Python36-32\lib\site-packages\gevent\event.py", line 355, in _raise_exception
reraise(*self.exc_info)
File "C:\Program Files (x86)\Python36-32\lib\site-packages\gevent\_compat.py", line 33, in reraise
raise value.with_traceback(tb)
File "C:\Program Files (x86)\Python36-32\lib\site-packages\gevent\threadpool.py", line 211, in _worker
value = func(*args, **kwargs)
File "C:\Program Files (x86)\Python36-32\lib\site-packages\pssh\ssh2_client.py", line 126, in _init
return self._connect_init_retry(retries)
File "C:\Program Files (x86)\Python36-32\lib\site-packages\pssh\ssh2_client.py", line 116, in _connect_init_retry
return self._init(retries=retries)
File "C:\Program Files (x86)\Python36-32\lib\site-packages\pssh\ssh2_client.py", line 126, in _init
return self._connect_init_retry(retries)
File "C:\Program Files (x86)\Python36-32\lib\site-packages\pssh\ssh2_client.py", line 116, in _connect_init_retry
return self._init(retries=retries)
File "C:\Program Files (x86)\Python36-32\lib\site-packages\pssh\ssh2_client.py", line 128, in _init
raise SessionError(msg, self.host, self.port, ex)
pssh.exceptions.SessionError: ('Error connecting to host %s:%s - %s', 'ip1', 22, SessionHandshakeError('SSH session handshake failed with error code %s', -5))
Process finished with exit code 1
Here is my code which uses Paramiko Client (changed real IPs to 'ip1' and 'ip2'):
from pssh.pssh_client import ParallelSSHClient
from pssh.utils import load_private_key
key_path = os.path.dirname(os.path.abspath(__file__)) + '/my_pkey'
pkey = load_private_key(key_path)
hosts = ['ip1', 'ip2']
client = ParallelSSHClient(hosts, user='root', pkey=pkey)
output = client.run_command('hostname')
for host, host_output in output.items():
for line in host_output.stdout:
print(line)
And it works. Here's the output (should I care about warnings?):
C:\Program Files (x86)\Python36-32\lib\site-packages\paramiko\ecdsakey.py:202: CryptographyDeprecationWarning: signer and verifier have been deprecated. Please use sign and verify instead.
signature, ec.ECDSA(self.ecdsa_curve.hash_object())
C:\Program Files (x86)\Python36-32\lib\site-packages\paramiko\rsakey.py:110: CryptographyDeprecationWarning: signer and verifier have been deprecated. Please use sign and verify instead.
algorithm=hashes.SHA1(),
ip1.hostname
ip2.hostname
Process finished with exit code 0
What am I doing wrong with Native Client?

This error was tracked down to the WinCNG back-end used for libssh2 on Windows - it does not support SHA-256 host key hashes which is now the default in recent versions of OpenSSH server.
The latest version of parallel-ssh, 1.6.0, fixes this issue by switching the Windows back-end to OpenSSL for better compatibility and to match the OSX and Linux binary wheels.
See release notes for more details.

Some explanations which I got from Panos in Google Groups thread. It didn't help me, but maybe it will be helpful for somebody else.
A -5 error is defined as a key exchange error in libssh2. It sounds
like the key type is not supported by libssh2 and paramiko shows
'ecdsakey.py' being used. ECDSA keys are not currently supported by
libssh2 (PR pending).
The warning are from paramiko itself, can't say if they matter.
Better exceptions for native client errors are being worked on for
next release.
_
So for a private key 'my_pkey', there should be a 'my_pkey.pub' in
same directory.
It may also be a case of the SSH server's key not being supported by
the native client (same limitations as user keys) which would explain
the key exchange error. Can check the type of key configured for the
server in /etc/ssh/sshd_config, HostKey entry. There should be at
least one non-ECDSA key configured, eg:
HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_dsa_key
HostKey /etc/ssh/ssh_host_ecdsa_key
If there is only a ECDSA key entry, the native client will not be able
to connect.