> For the complete documentation index, see [llms.txt](https://painor.gitbook.io/gramjs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://painor.gitbook.io/gramjs/working-with-files/upload.getcdnfile.md).

# upload.getCdnFile

Download a [CDN](https://core.telegram.org/cdn) file.

## Example

{% tabs %}
{% tab title="Javascript" %}

```javascript
const {Api, TelegramClient} = require('telegram');
const {StringSession} = require('telegram/sessions');

const session = new StringSession('');
const client = new TelegramClient(session, apiId, apiHash, {});

(async function run() {
    const result = await client.invoke(new Api.upload.getCdnFile({
        fileToken: Buffer.from('some bytes here'),
        offset: 1130267,
        limit: 8166765,
        }));
    console.log(result); // prints the result
})();
```

{% endtab %}

{% tab title="TypeScript" %}

```typescript
import {Api, TelegramClient} from 'telegram';
import {StringSession} from 'telegram/sessions';

const session = new StringSession('');
const client = new TelegramClient(session, apiId, apiHash, {});

(async function run() {
    const result: Api.upload.CdnFile = await client.invoke(new Api.upload.getCdnFile({
        fileToken: Buffer.from('some bytes here'),
        offset: 1130267,
        limit: 8166765,
        }));
    console.log(result); // prints the result
})();
```

{% endtab %}
{% endtabs %}

## TL schema

```
upload.cdnFileReuploadNeeded#eea8e46e request_token:bytes = upload.CdnFile;
upload.cdnFile#a99fca4f bytes:bytes = upload.CdnFile;
---functions---
upload.getCdnFile#2000bcc3 file_token:bytes offset:int limit:int = upload.CdnFile;
```

## Parameters

|       Name      | Type                                          | Description                 |
| :-------------: | --------------------------------------------- | --------------------------- |
| **file\_token** | [bytes](https://core.telegram.org/type/bytes) | File token                  |
|    **offset**   | [int](https://core.telegram.org/type/int)     | Offset of chunk to download |
|    **limit**    | [int](https://core.telegram.org/type/int)     | Length of chunk to download |

## Result

[upload.CdnFile](https://core.telegram.org/type/upload.CdnFile)

## Possible errors

| Code | Type | Description |
| :--: | ---- | ----------- |

## Can bots use this methd ?

### yes

## Related pages

### [Encrypted CDNs for Speed and Security](https://core.telegram.org/cdn)