4GB Upload

[silincone]

Is it possible to upload 4GB documents, if so, how?

[we-lu]

Information on sending files are written here: https://core.telegram.org/bots/api#sending-files

Either you

• upload the file manually to Telegram. Then you need Telegram Premium to upload files up to 4GB. Without Premium the limit is at 2GB
• upload the file via API to Telegram. Then you have the file limit somewhere at 20MB

[silincone]

I see, but look at this repo for example, it is written in python and uses pyrogram framework to download/upload files to telegram.

Without premium account, the bot is able to download upto 4GB size document and upload 2GB size document,
With premium account "string", it can upload & download upto 4GB size document.

If Pyrogram can do it, why not TgBot?! I am just trying to find a c++ alternative to pyrogram, thought that TgBot would do, but it seems to not help.

Please do reply back, I have no one else to ask this with.

I am a beginner at C++ and I do not know any other programming languages, so guess you'll understand me.

[reo7sp]

Pyrogram uses Telegram MTProto as a user client; tgbot-cpp wraps the HTTP Bot API, so the capabilities and limits are different.

For the hosted endpoint https://api.telegram.org:

• multipart upload: up to 50 MB for general files;
• download through getFile: up to 20 MB;
• sending an existing Telegram file_id: no re-upload limit.

A self-hosted telegram-bot-api server can download without a size limit and upload up to 2000 MB, not 4 GB. To use it with tgbot-cpp:

TgBot::CurlHttpClient httpClient;
TgBot::Bot bot(token, httpClient, "http://localhost:8081");

That URL works only when a local Bot API server is actually running there. tgbot-cpp cannot bypass either server-side limit; 4 GB uploads through a Premium user account are an MTProto feature, not a Bot API feature.