mirror of
https://github.com/LonamiWebs/Telethon.git
synced 2024-12-02 14:23:45 +03:00
114 lines
4.6 KiB
ReStructuredText
114 lines
4.6 KiB
ReStructuredText
.. _sessions:
|
|
|
|
==============
|
|
Session Files
|
|
==============
|
|
|
|
The first parameter you pass to the constructor of the ``TelegramClient`` is
|
|
the ``session``, and defaults to be the session name (or full path). That is,
|
|
if you create a ``TelegramClient('anon')`` instance and connect, an
|
|
``anon.session`` file will be created on the working directory.
|
|
|
|
These database files using ``sqlite3`` contain the required information to
|
|
talk to the Telegram servers, such as to which IP the client should connect,
|
|
port, authorization key so that messages can be encrypted, and so on.
|
|
|
|
These files will by default also save all the input entities that you've seen,
|
|
so that you can get information about an user or channel by just their ID.
|
|
Telegram will **not** send their ``access_hash`` required to retrieve more
|
|
information about them, if it thinks you have already seem them. For this
|
|
reason, the library needs to store this information offline.
|
|
|
|
The library will by default too save all the entities (chats and channels
|
|
with their name and username, and users with the phone too) in the session
|
|
file, so that you can quickly access them by username or phone number.
|
|
|
|
If you're not going to work with updates, or don't need to cache the
|
|
``access_hash`` associated with the entities' ID, you can disable this
|
|
by setting ``client.session.save_entities = False``, or pass it as a
|
|
parameter to the ``TelegramClient``.
|
|
|
|
If you don't want to save the files as a database, you can also create
|
|
your custom ``Session`` subclass and override the ``.save()`` and ``.load()``
|
|
methods. For example, you could save it on a database:
|
|
|
|
.. code-block:: python
|
|
|
|
class DatabaseSession(Session):
|
|
def save():
|
|
# serialize relevant data to the database
|
|
|
|
def load():
|
|
# load relevant data to the database
|
|
|
|
|
|
You should read the ````session.py```` source file to know what "relevant
|
|
data" you need to keep track of.
|
|
|
|
|
|
Sessions and Heroku
|
|
-------------------
|
|
|
|
You probably have a newer version of SQLite installed (>= 3.8.2). Heroku uses
|
|
SQLite 3.7.9 which does not support ``WITHOUT ROWID``. So, if you generated
|
|
your session file on a system with SQLite >= 3.8.2 your session file will not
|
|
work on Heroku's platform and will throw a corrupted schema error.
|
|
|
|
There are multiple ways to solve this, the easiest of which is generating a
|
|
session file on your Heroku dyno itself. The most complicated is creating
|
|
a custom buildpack to install SQLite >= 3.8.2.
|
|
|
|
|
|
Generating a Session File on a Heroku Dyno
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. note::
|
|
Due to Heroku's ephemeral filesystem all dynamically generated
|
|
files not part of your applications buildpack or codebase are destroyed
|
|
upon each restart.
|
|
|
|
.. warning::
|
|
Do not restart your application Dyno at any point prior to retrieving your
|
|
session file. Constantly creating new session files from Telegram's API
|
|
will result in a 24 hour rate limit ban.
|
|
|
|
Due to Heroku's ephemeral filesystem all dynamically generated
|
|
files not part of your applications buildpack or codebase are destroyed upon
|
|
each restart.
|
|
|
|
Using this scaffolded code we can start the authentication process:
|
|
|
|
.. code-block:: python
|
|
|
|
client = TelegramClient('login.session', api_id, api_hash).start()
|
|
|
|
At this point your Dyno will crash because you cannot access stdin. Open your
|
|
Dyno's control panel on the Heroku website and "Run console" from the "More"
|
|
dropdown at the top right. Enter ``bash`` and wait for it to load.
|
|
|
|
You will automatically be placed into your applications working directory.
|
|
So run your application ``python app.py`` and now you can complete the input
|
|
requests such as "what is your phone number" etc.
|
|
|
|
Once you're successfully authenticated exit your application script with
|
|
CTRL + C and ``ls`` to confirm ``login.session`` exists in your current
|
|
directory. Now you can create a git repo on your account and commit
|
|
``login.session`` to that repo.
|
|
|
|
You cannot ``ssh`` into your Dyno instance because it has crashed, so unless
|
|
you programatically upload this file to a server host this is the only way to
|
|
get it off of your Dyno.
|
|
|
|
You now have a session file compatible with SQLite <= 3.8.2. Now you can
|
|
programatically fetch this file from an external host (Firebase, S3 etc.)
|
|
and login to your session using the following scaffolded code:
|
|
|
|
.. code-block:: python
|
|
|
|
fileName, headers = urllib.request.urlretrieve(file_url, 'login.session')
|
|
client = TelegramClient(os.path.abspath(fileName), api_id, api_hash).start()
|
|
|
|
.. note::
|
|
- ``urlretrieve`` will be depreciated, consider using ``requests``.
|
|
- ``file_url`` represents the location of your file.
|