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Add file IDs section to the FAQ
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@ -203,6 +203,36 @@ Telegram has a lot to offer, and inheritance helps the library reduce
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boilerplate, so it's important to know this concept. For newcomers,
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boilerplate, so it's important to know this concept. For newcomers,
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this may be a problem, so we explain what it means here in the FAQ.
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this may be a problem, so we explain what it means here in the FAQ.
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Can I send files by ID?
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=======================
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When people talk about IDs, they often refer to one of two things:
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the integer ID inside media, and a random-looking long string.
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You cannot use the integer ID to send media. Generally speaking, sending media
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requires a combination of ID, ``access_hash`` and ``file_reference``.
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The first two are integers, while the last one is a random ``bytes`` sequence.
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* The integer ``id`` will always be the same for every account, so every user
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or bot looking at a particular media file, will see a consistent ID.
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* The ``access_hash`` will always be the same for a given account, but
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different accounts will each see their own, different ``access_hash``.
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This makes it impossible to get media object from one account and use it in
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another. The other account must fetch the media object itself.
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* The ``file_reference`` is random for everyone and will only work for a few
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hours before it expires. It must be refetched before the media can be used
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(to either resend the media or download it).
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The second type of "`file ID <https://core.telegram.org/bots/api#inputfile>`_"
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people refer to is a concept from the HTTP Bot API. It's a custom format which
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encodes enough information to use the media.
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Telethon provides an old version of these HTTP Bot API-style file IDs via
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``message.file.id``, however, this feature is no longer maintained, so it may
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not work. It will be removed in future versions. Nonetheless, it is possible
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to find a different Python package (or write your own) to parse these file IDs
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and construct the necessary input file objects to send or download the media.
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Can I use Flask with the library?
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Can I use Flask with the library?
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=================================
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=================================
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