mirror of
https://github.com/LonamiWebs/Telethon.git
synced 2024-11-24 02:13:45 +03:00
133 lines
5.7 KiB
ReStructuredText
133 lines
5.7 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 in the working directory.
|
|
|
|
Note that if you pass a string it will be a file in the current working
|
|
directory, although you can also pass absolute paths.
|
|
|
|
The session file contains enough information for you to login without
|
|
re-sending the code, so if you have to enter the code more than once,
|
|
maybe you're changing the working directory, renaming or removing the
|
|
file, or using random names.
|
|
|
|
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``.
|
|
|
|
Custom Session Storage
|
|
----------------------
|
|
|
|
If you don't want to use the default SQLite session storage, you can also use
|
|
one of the other implementations or implement your own storage.
|
|
|
|
To use a custom session storage, simply pass the custom session instance to
|
|
``TelegramClient`` instead of the session name.
|
|
|
|
Telethon contains two implementations of the abstract ``Session`` class:
|
|
|
|
* ``MemorySession``: stores session data in Python variables.
|
|
* ``SQLiteSession``, (default): stores sessions in their own SQLite databases.
|
|
|
|
There are other community-maintained implementations available:
|
|
|
|
* `SQLAlchemy <https://github.com/tulir/telethon-session-sqlalchemy>`_: stores all sessions in a single database via SQLAlchemy.
|
|
* `Redis <https://github.com/ezdev128/telethon-session-redis>`_: stores all sessions in a single Redis data store.
|
|
|
|
Creating your own storage
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
The easiest way to create your own storage implementation is to use ``MemorySession``
|
|
as the base and check out how ``SQLiteSession`` or one of the community-maintained
|
|
implementations work. You can find the relevant Python files under the ``sessions``
|
|
directory in Telethon.
|
|
|
|
After you have made your own implementation, you can add it to the community-maintained
|
|
session implementation list above with a pull request.
|
|
|
|
SQLite 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 SQLite 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.
|