line chatbot

Last update: Thu Jun 5 22:25:41 2025

This is a new Template for line chatbot!

Presentation

Principle

Started that in December 2016, idea would be a line chatbot that can do some domotics... First we'll work with the Messaging API of Line.

Points of interest

Implementation

Basics: get a service running and plugged in Line

Create a business account, as a developer

Make a Channel, but for that you'll need a Provider

On the backend server, make a user linebot : sudo adduser --disabled-login linebot

If python pip is not here, you can :python -m ensurepip --default-pip or curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py;python get-pip.py or python -m ensurepip --default-pip

sudo pip install line-bot-sdk flask

git clone https://github.com/line/line-bot-sdk-python

Make yourself a DNS name, Duck DNS is fantastic and free (thanks guys!)

Now you need a certificate, so use certbot (let's encrypt thanks for your free service!) for that. I tried many options, but ended by using the manual method: sudo certbot certonly --manual -d myserver.duckdns.org
you'll need to run a parallel simple webserver, but it's all explained on the screen, just read it, you'll end up with you 2 .pem certificate files. You want that key file and your fullchain.pem that is stored in /etc/letsencrypt/live/myserver.duckdns.org/. You can use the privkey that is there too, it's the same as the key file you generated above.


mkdir -p /tmp/certbot/public_html/.well-known/acme-challenge
cd /tmp/certbot/public_html
printf "%s" ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ.XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX > .well-known/acme-challenge/ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ

sudo $(command -v python2 || command -v python2.7 || command -v python2.6) -c "import BaseHTTPServer, SimpleHTTPServer; \
s = BaseHTTPServer.HTTPServer(('', 80), SimpleHTTPServer.SimpleHTTPRequestHandler); \
s.serve_forever()"

You should now be able to run the basic samples of Line, after editing the code as below to enable listening to outside request (host="0.0.0.0") and enabling the certificates:


if __name__ == "__main__":
    app.run(host="0.0.0.0", ssl_context=('fullchain.pem', 'privkey.pem'))

Now go to Line website and go to your channel then provider and edit the 2 webhooks settings:

Use webhooks: set to Enabled

Webhook URL: put the url of your callback service, ie https://myserver.duckdns.org/callback You can even test, though it fails for me with the sample "flask-echo" but it works when you call it by talking to your line bot!

Victory, as you're here, you have a beta prototype working. Good job, go grab a beer. Yes you can, you deserve it.

Basics: as a docker!

I need a pretext to study docker, sounds about right. I will detail it here.

Natural Language Processing : SpaCy

Install Spacy, Python 2.x, in a Virtualenv, and English catalog


python -m pip install -U virtualenv
virtualenv .env
source .env/bin/activate
pip install -U spacy
python -m spacy download en

Schematics

Source code

Pictures

Links

Sites you'll need

Line developer portal: https://developers.line.biz/console/

Helpful sources

Official getting started with Messaging API https://developers.line.biz/en/docs/messaging-api/getting-started/

Official python SDK https://github.com/line/line-bot-sdk-python

Certbot (Let's encrypt) and Flask

NLP

SpaCy the trendy python lib https://spacy.io/usage/

Inspiration

All content on this site is shared under the MIT licence (do what u want, don't sue me, hat tip appreciated)
electrogeek.tokyo ~ Formerly known as Kalshagar.wikispaces.com and electrogeek.cc (AlanFromJapan [2009 - 2025])