Build a WeChat Public Account Backend with Python/Django: Step‑by‑Step Guide

0x00 Background and Introduction

Apply for a WeChat public platform subscription account, connect the backend to a server, verify the server address, implement simple business logic, and respond differently based on the type of user message.

0x01 Language and Framework

Language: Python

Framework: Django

Development package: wechat-python-sdk

GitHub source code: https://github.com/PorridgeEater/WeChat

0x02 Reference Documentation

WeChat public platform development docs: http://mp.weixin.qq.com/wiki/home/index.html

SDK documentation: http://wechat-python-sdk.com/

0x03 Server Configuration

System: CentOS

Configuration steps:

Update the system

Install Python dependencies

Install Python and pip and update

Install Django framework

Install wechat-python-sdk package

Create a Django project

Add URL rules (urls.py)

Write view logic (views.py)

Run Django app on port 80

0x04 WeChat Backend Configuration

Record APPID and APPSecret in the conf attribute of views.py Fill in server configuration

Ensure the URL ends with a trailing slash, otherwise Django reports a POST URL error

Set a custom token in the conf attribute of views.py Set a custom EncodingAESKey in the conf attribute of

views.py

0x05 Pitfalls Encountered

After runserver, local access works but external access fails

Bind IP to 0.0.0.0 for public listening

Chinese input does not receive a response

After import os, set encoding to utf8 Port number is already in use

Run ps aux | grep manage and kill the corresponding process

0x06 Afterword

The system can recognize different message types and reply accordingly.

The code’s functionality still needs improvement, and its structure and logic could be clearer.