关于通过Telegram传输二进制数据及Base64支持的技术问询

Great question! Let's break this down step by step:

1. Does Telegram support Base64-encoded text? #

Absolutely. Base64 uses a limited set of ASCII characters (uppercase letters, lowercase letters, digits, +, /, and = for padding) — all of which are fully supported in Telegram's text messages. There's no restriction on sending Base64 strings as regular chat messages, so this approach is technically feasible.

2. How to transfer binary data via Base64 on Telegram #

The workflow is straightforward:

• Encode: Convert your binary file/data into a Base64 string using any programming language or tool (e.g., Python, command-line tools like base64 on Unix-like systems).
• Send: Paste the Base64 string into a Telegram message and send it. For large files, split the Base64 string into chunks that fit within Telegram's text message limits (regular messages have a 4096-character cap; supergroups/channels allow longer messages, but splitting is still safer for very large data).
• Decode: The recipient takes the Base64 string(s), concatenates them if split, and decodes them back into the original binary data.

Here's a quick Python example for encoding/decoding:

# Encode binary file to Base64
import base64
with open("your_file.bin", "rb") as input_file:
    encoded_data = base64.b64encode(input_file.read()).decode("utf-8")

# Decode Base64 back to binary
with open("recovered_file.bin", "wb") as output_file:
    output_file.write(base64.b64decode(encoded_data))

3. Key considerations #

• Efficiency: Base64 encoding increases the data size by ~33% (since 3 bytes of binary become 4 bytes of text), so this is less efficient than sending files directly. If Telegram allows you to send files (which it does by default for most binary types), that's a better option.
• Message limits: As mentioned, regular text messages have a 4096-character limit. For large binary files, you'll need to split the Base64 string into smaller chunks and send them separately, then have the recipient reassemble them before decoding.
• Legal & TOS notes: While you mentioned your region doesn't block Telegram, using this method to bypass other forms of content censorship may violate local laws or Telegram's Terms of Service. Always ensure you're acting within legal boundaries.

4. Alternative: Direct file transfer #

Telegram natively supports sending arbitrary binary files (documents, archives, etc.) up to 2GB in size (for Premium users; free users have lower limits). If file sending isn't restricted in your region, this is far more practical than converting to Base64 text.

内容的提问来源于stack exchange，提问作者Seyed Amin