Broken downloaded files

[ak8y]

Faced with problem: lost 64k chunks in downloaded files (zeros instead of data) in /var/lib/telegram-bot-api/XXXXXXXXXX:123asd.../videos/file_0.MOV

Runs in docker on macos 15.3.2 (m1 pro) in local mode
telegram-bot-api --dir=/var/lib/telegram-bot-api --temp-dir=/tmp/telegram-bot-api --username=telegram-bot-api --groupname=telegram-bot-api --http-port=8081 --local --http-stat-port=8082 --log=/var/lib/telegram-bot-api/telegram-bot-api.log --verbosity=5
version - Bot API 8.3

Broken file itself
Detailed log telegram-bot-api.log
(file id in logs - BAACAgIAAxkBAANCZ9fra6MWQjIfm__6Y2Bs-vXGo9sAAq9lAAKM6MBK9U8uYrIBw9E2BA)

[levlam]

The file in the log is being downloaded. Also, the log doesn't look complete. Many parts that must be in the log are missing, therefore it is impossible to tell whether and how download of the file was completed.

[ak8y]

i tried this config on VPS with Ubuntu 24.04 and everything works fine. It seems like it is platform specific problem. i can gather more info if needed

[levlam]

It could be a Docker bug if you access the files from outside of the Docker container.

[ak8y]

i could try reproduce the problem and collect needed data, let me know requirements for testing environment (but would like in docker). I used aiogram\telegram-bot-api docker image, maybe problem is there

[levlam]

It is important, how and when do you access the file.

[nijuyonkadesu]

After reading your comments @levlam I tried adding volume to my service file, but I still get the same error.
I am running the bot server using podman quadlet.

open /data/xxxx:xxxxxx/photos/file_0.jpg: no such file or directory

My container file:

[Unit]
Description=Telegram Bot Server hosted by @shichika

[Container]
Image=localhost/telegram-bot-api:latest
Pull=never
Volume=/var/lib/telegram-bot-api/temp:/temp
Volume=/var/lib/telegram-bot-api/data:/data
EnvironmentFile=/etc/containers/homelab/telegram-bot-api.env
Exec=--local --temp-dir=/temp --dir=/data
PublishPort=8081:8081

[Service]
Restart=always

[Install]
WantedBy=default.target

And server is running just fine on paper 🤔

     Loaded: loaded (/etc/containers/systemd/telegram-bot-api.container; generated)
     Active: active (running) since Sun 2025-04-06 17:47:34 UTC; 4s ago
 Invocation: 9a97f08af9f04ebb8f7d08ab76fbdeb6
   Main PID: 67497 (conmon)
      Tasks: 13 (limit: 74712)
     Memory: 7M (peak: 15.4M)
        CPU: 98ms
     CGroup: /system.slice/telegram-bot-api.service
             ├─libpod-payload-0680ab655416a9a0f728c4da9bb557712de06d7c2965c8a669e388ca4a64a729
             │ └─67499 /telegram-bot-api --local --temp-dir=/temp --dir=/data
...

The library I'm using is gotgbot and it says:

// GetFile (https://core.telegram.org/bots/api#getfile)
//
// Use this method to get basic information about a file and prepare it for downloading. For the moment, bots can download files of up to 20MB in size. On success, a File object is returned. The file can then be downloaded via the link https://api.telegram.org/file/bot<token>/<file_path>, where <file_path> is taken from the response. It is guaranteed that the link will be valid for at least 1 hour. When the link expires, a new one can be requested by calling getFile again.
// Note: This function may not preserve the original file name and MIME type. You should save the file's MIME type and name (if available) when the File object is received.
//   - fileId (type string): File identifier to get information about
//   - opts (type GetFileOpts): All optional parameters.
func (bot *Bot) GetFile(fileId string, opts *GetFileOpts) (*File, error) {
	return bot.GetFileWithContext(context.Background(), fileId, opts)
}

gotta check.

[levlam]

The Bot API method getFile saves the file locally to the Bot API server and returns full path to the file in local mode.

[nijuyonkadesu]

my bot application was running on another system, and botapi server in another system.
so ofc os.ReadFile(fullpath) will fail 🥰

... this is embarrassing.

  if state.State.Config.Telegram.SelfHostedAPI {
    return os.ReadFile(filePath)
  }

[alexk8y]

It is important, how and when do you access the file.

Got file phisically from botapi environment, after successful call botapi's GetFile via aiogram framework