ChatGPT Line Bot

• English
• 繁體中文版README.md

🤖 Introduction

Integrate ChatGPT Bot into Line. Simply input text into the input box to start interacting with ChatGPT.

✨ Features

• Completely free ChatGPT Bot

• Weekly horoscope information (real-time)

  

• Scheduled push for YouTube music channels

  

• Online image search (real-time)

  

Note

If you have any feature requests, feel free to submit a PR or an ISSUE.

🔨 Tools

• Python FastAPI: Create the ChatGPT response API
• gpt4free: Use OpenAI API for free
• zhipuai: Use GPT API for free
• Line messaging API channel: Connect ChatGPT API
• GitHub: Code repository
• replit/render/ngrok: Deploy your own FastAPI for free
• CronJob: Send scheduled requests for free, enabling scheduled push messages

🧠 Free GPT Options

Since g4f relies on reverse engineering to call OpenAI's API, it can be unstable. Therefore, the author suggests an alternative solution using the Zhipu AI open platform for free GPT API access.

• g4f: Use reverse engineering to call OpenAI API
• zhipuai: Zhipu AI open platform offers free GPT API. Visit the official site to register an account without requiring any credit card or fees. Add an API key in the Personal Center as shown below. Set this API key in the environment variables to use this GPT option.

🎈 Installation Steps

Obtain Tokens

1. Get Line Tokens:
   1. Log in to Line Developer
   2. Create a bot:
      1. Create a Provider -> Click Create
      2. Create a Channel -> Select Create a Messaging API channel
      3. Fill in the required basic information
      4. After completion, go to Basic Settings -> Under Channel Secret, click Issue to generate the LINE_CHANNEL_SECRET (used later).
      5. Under Messaging API, click Issue to generate the Channel access token (used later).

Project Setup and Execution

1. Fork the GitHub Project:
   1. Register/Log in to GitHub
   2. Navigate to ChatGPT-Line-Bot
   3. Click Star to support the developer
   4. Click Fork to copy all the code to your repository
2. Deployment:

• ngrok: Use a local computer (or Google Colab) as a server to deploy the API

  • Download the appropriate version of ngrok for your OS

  • Add the ngrok.exe path to your system's environment variables

  • Launch FastAPI in the terminal: $env:LINE_CHANNEL_SECRET="..."; $env:LINE_CHANNEL_ACCESS_TOKEN="..."; $env:SERPAPI_API_KEY="..."; $env:GPT_METHOD="..."; $env:GPT_API_KEY="..."; python main.py

    • GPT_METHOD: Choose g4f or zhipuai
    • GPT_API_KEY: If using the zhipuai method, provide your API key

  • Run: ngrok config add-authtoken <token>. Obtain the token from your personal ngrok dashboard.

  • Run: ngrok http 8080. The forwarding URL will be the webhook URL.

    

Finally, replace the webhook URL in the Line Developer console's Messaging API section. (See Step 2 in Project Setup)

Connect Service with Line Bot

Go back to the Line Developer homepage, click Add Friend Guide, and scan the QR code to add the Line Bot as a friend.

Homepage -> Select your bot -> Add friend tools -> Create Friend Action Barcode (https://manager.line.biz/account//gainfriends)

Congratulations! You've created your first Line Bot. Try talking to it—it will reply to you!

⛄ Group vs. Individual Chats

• In a one-on-one chat, any message will trigger a response.
• In group chats, use the @chat prefix to interact with the bot, e.g., @chat hi~.

🎃 Special Features

Horoscope

When your message contains a request for horoscope information, a web crawler will fetch the weekly horoscope:

• Personal chat: Give me the Scorpio horoscope, I want to know the Scorpio horoscope, ...
• Group chat: @chat Give me the Scorpio horoscope, @chat I want to know the Scorpio horoscope, ...

Online Image Search

When your message contains a request for an image, a web crawler will fetch an image:

• Personal chat: Find an image of Lin Xiang smoking online, Give me an image of Lin Xiang smoking online, ...
• Group chat: @chat Find an image of Lin Xiang smoking online, @chat Give me an image of Lin Xiang smoking online, ...

📢 Broadcast Messages - Daily YouTube Recommendations

• Using the broadcast API, the Line Bot can push messages to all users at once.
• This example demonstrates how the Line Bot can push 3 randomly selected YouTube songs every morning:

  • Create the file ./data/favorite_videos.json. Refer to the author's dataset.

    (The dataset is generated using the YouTube Data v3 API to fetch favorite videos. This guide does not cover YouTube API usage.)

  • Use ./chatgpt_linebot/modules/youtube_recommend.py to randomly select 3 songs, formatted by GPT.

  • Add a /recommend route in ./chatgpt_linebot/urls.py:

    videos = recommend_videos() # Get 3 songs
    
    if videos:
        line_bot_api.broadcast(TextSendMessage(text=videos)) # Broadcast to users
    
        # Push messages to known groups
        known_group_ids = [
            'C6d-xxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
            'Ccc-xxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
            'Cbb-xxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
        ]
        for group_id in known_group_ids:
            line_bot_api.push_message(group_id, TextSendMessage(text=videos))

    To retrieve group group_id, print it in the console:

    elif event.source.type == 'group' and user_message.startswith('@chat'):
        group_id = event.source.group_id
        print(group_id) # Output group_id

  • Now, hitting the /recommend route will broadcast messages to all users and specified groups.

  • Use cron-job.org to schedule daily pushes at 8:00 AM:

    1. Register/Log in to cron-job.org
    2. Click CREATE CRONJOB in the top-right corner
    3. Title: ChatGPT-Line-Bot, URL: e.g., https://ChatGPT-Line-Bot.jimmylin.repl.co/
    4. Set to run every 5 minutes
    5. Click CREATE

⚔ Advanced - Personalized Bot

You can personalize the Line Bot's responses using prompts. Define template in ./chatgpt_linebot/prompts/template.py, for example:

User input: What should I have for breakfast?

Bot response: Darling, are you awake yet? I've been waiting in bed, thinking of your lovely figure. What should we have for breakfast? How about something spicy, like a hot omelet to match your fiery charm? 😏🍳

Free Deployment Options

References

1. Line_Bot_Tutorial

2. ChatGPT-Line-Bot

Back to top