Overview of WeChat Development

WeChat public platform development overview

WeChat public platform is a platform for operators to provide information and services to WeChat users through public accounts, and public platform development Interface is the basis for providing services , after developers create a public account on the public platform website and obtain interface permissions, they can help development by reading this interface document.

In order to identify users, each user will generate a secure OpenID for each public account. If you need to share users between multiple public accounts and mobile applications, you need to go to WeChat The open platform binds these official accounts and applications to an open platform account. After binding, although a user has multiple different OpenIDs for multiple official accounts and applications, he does not have access to all the public accounts and applications under the same open platform account. Official accounts and applications have only one UnionID. You can learn more in the User Management-Obtaining User Basic Information (UnionID Mechanism) document.

Please note to developers:

1. WeChat public platform development refers to business development for WeChat public accounts, including mobile applications, PC websites, and public accounts. For the development of third-party platforms (which provide services to public account operators from all walks of life), please go to the WeChat open platform to access.
2. Before applying for a certified public account, you can quickly apply for an interface test account through the test account application system and start interface testing and development immediately.
3. During the development process, you can use interface debugging tools to debug certain interfaces online.
4. Each interface has a daily interface call frequency limit. You can check the specific frequency on the official website of the public platform - Developer Center.
5. When problems occur during development, you can discover and solve the problem through the return code of the interface call and the alarm troubleshooting guide (the interface alarm can be set on the official website of the public platform - Developer Center).
6. The public platform uses access_token as the interface calling credential to call the interface. All interface calls need to obtain the access_token first. The access_token is valid within 2 hours. When it expires, it needs to be obtained again, but the number of times it can be obtained within one day is limited. The developer needs to Storage, see Obtaining Interface Call Credentials (access_token) documentation for details.
7. The public platform interface call only supports port 80.

Official accounts mainly provide services to users through official account message sessions and web pages within the official account. The two situations are introduced below:

1. Official account Message conversation

The public account exists in the form of a contact of the WeChat user. The message conversation is the basis for the interaction between the public account and the user. At present, there are mainly several types of messaging services in public accounts, which are used in different scenarios.

1) Mass messages: Official accounts can send mass messages to users at a certain frequency (once a day for subscription accounts, 4 times a month for service accounts), including text messages, graphic messages, Pictures, videos, voices, etc.
2) Passive reply message: After the user sends a message to the official account, the WeChat server will send the message to the server address pre-set by the developer in the developer center (the developer needs to verify the authenticity of the message), and the official account can Reply within 5 seconds, you can reply to a message, or you can reply with a command to tell the WeChat server not to reply to this message yet. Encryption can be set for passive reply messages (set it in the developer center of the official website of the public platform. After setting, it will be processed according to the message encryption and decryption documents. The other three types of message calls are not required because they are API calls rather than returns of requests. Encryption and decryption).
3) Customer service messages: Within 48 hours after the user sends a message to the official account, the official account can send an unlimited number of messages to the user, mainly used in customer service scenarios. User behavior will trigger event push. Some event push allows public accounts to send customer service messages accordingly. For details, see the WeChat push message and event description document.
4) Template messages: When it is necessary to send service notifications to users (such as card swiping reminders, service reservation success notifications, etc.), the official account can use specific content templates to proactively send messages to users.

2. Web pages in public accounts

Many complex business scenarios require providing services through web pages. In this case, you need to use:

1) Authorize the web page to obtain the user's basic information: Through this interface, you can obtain the user's basic information (obtaining the user's OpenID does not require the user's consent, and obtaining the user's basic information requires the user's consent)
2) WeChat JS-SDK: It is a toolkit for developers to use WeChat native functions on web pages through JavaScript code. Developers can use it to record and play WeChat voices on web pages, monitor WeChat sharing, upload local pictures on mobile phones, take photos, and many other capabilities.

Typical case introduction

The public accounts worth learning from are mainly service accounts. Let’s list and introduce them as follows:

China Merchants Bank Credit Card Center

If you are a cardholder, you canquickly querycredit card bills, limits and points; quickly repay and apply for bills Installment; WeChat transfer manual service; credit card consumption, WeChat free reminders. If you are not a cardholder, you can apply for a card via WeChat!

The China Merchants Bank official account guides users through prompt messages to safely bind their WeChat ID and credit card number.
Users can check bills, receive credit card notifications and other functions through this official account. This is a function implemented by China Merchants Bank developers through the official account interface.

China Southern Airlines

China Southern Airlines official account allows users to bind the Sky Pearl membership service with WeChat ID. Users can book tickets, check orders, and even apply for boarding passes through this official account.

Guangdong Unicom

##You can bind your mobile phone number in WeChat , points traffic, package balance, mobile Internet traffic, WeChat exclusive traffic inquiry, customer service consultation.

Guangdong China Unicom has also cooperated deeply with WeChat. If you purchase WeChat Woka, you can get the five major privileges of WeChat.

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