Nodejs builds WeChat

Public Account Development Platform

WeChat public accounts have become an important means of promotion and marketing for many companies, and the development of WeChat public accounts has also become an important skill for many programmers. In the development of WeChat official accounts, Node.js has become a popular technology choice because of its speed and scalability.

This article will introduce how to use Node.js to build a WeChat public account development platform, including creating a WeChat public account, configuring the development environment, accessing the WeChat server, processing WeChat messages, implementing custom menus and sending images core functions such as text messages.

1. Create a WeChat public account

First of all, we need to register a public account on the WeChat public account platform. This step is very simple. Just go to the official website of the WeChat public platform to register.

After successful registration, we need to make some basic configurations in the background of the official account, such as setting the avatar, description, menu, welcome message, etc. of the official account. The most important of them is to set the developer information and obtain the developer ID and Secret.

2. Configuring the development environment

The establishment of the Node.js environment is not the focus of this article, so I will not introduce it in too much. Here we assume that the reader already has a Node.js development environment. .

Next, we need to install some Node.js dependency packages, such as express, body-parser, request, etc. These dependency packages can be installed through the npm package manager.

Before creating a development platform for WeChat public accounts, we need to set up the server configuration in the WeChat public account background and fill in the interface address and token.

3. Access to the WeChat server

The development of WeChat public accounts requires interaction with the WeChat server, so we need to process the messages sent by the WeChat server in the development platform. The main processes here include Verify server address and process WeChat messages.

First, we need to configure the server address of the official account to the WeChat server. After successful verification, the WeChat server will send a POST request to the interface address provided by the development platform. We can verify according to the rules set by the WeChat public platform. After passing the verification, we can start processing WeChat messages.

4. Processing WeChat messages

The core of WeChat public account development is message processing, including receiving and replying to messages. When processing WeChat messages, we need to parse the POST request sent by the WeChat server, obtain the message type and message content, then process it according to business needs, and finally encapsulate the reply message and return it to the WeChat server.

Message types include text messages, picture messages, voice messages, video messages, geographical location messages, link messages, etc. For different message types, we need to parse and process them separately. When processing WeChat messages, we can use some third-party Node.js modules or libraries, such as wechat lite version, wechat-cli, etc.

5. Implement customized menu

WeChat public accounts can customize menus to facilitate users to interact with public accounts. The custom menu can include functions such as click menu, jump URL, scan code to push events, scan code to bring prompts, pop-up system photo, pop-up photo or photo album, etc.

Implementing a custom menu needs to be developed in accordance with the protocol rules provided by the WeChat public platform. It mainly includes the following steps:

1. Obtain access_token.

2. Setting menu.

3. Query menu.

4. Delete menu.

6. Sending graphic messages

WeChat official account also supports sending graphic messages, including single graphic messages and multiple graphic messages. When sending graphic messages, we need to develop according to the protocol rules provided by the WeChat public platform. It mainly includes the following steps:

1. Obtain access_token.

2. Upload pictures or public account articles.

3. Organize graphic and text messages.

4. Send graphic messages.

7. Summary

This article introduces how to use Node.js to build a WeChat public account development platform, including creating a WeChat public account, configuring the development environment, accessing the WeChat server, and processing WeChat messages. , implement core functions such as custom menus and sending graphic messages.

Using Node.js to develop WeChat public accounts can be developed quickly, easy to manage, and easy to expand. However, you also need to have a certain understanding of the API of the WeChat public platform and how to securely transmit and process data. I hope this article can be helpful to Node.js beginners and WeChat public account developers.

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