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Editor to share with you the C# development of Wechat portals and applications of Wechat message processing and response example analysis, I hope you will learn something after reading this article, let's discuss it together!

1. Message response interaction of Wechat

As we know, Wechat's server serves as a bridge between the client's mobile phone and the developer's server, and realizes the interaction with users through message transmission and response. here is its message flow chart.

The messages requested by Wechat to the developer server include many types, but basically, they are divided into text message processing, event message processing, voice message recognition, and the basic classification of message authentication operations before becoming a developer. The following is a message classification diagram I drew, which introduces these relationships, as well as their respective message classification.

For the requests for these messages, on the development server side, we need to write relevant logic for corresponding processing, and then respond to the message to the Wechat server platform.

In my previous essay, I posted code to introduce the entry operation of Wechat message processing, as shown below.

Public void ProcessRequest (HttpContext context) {/ / WHC.Framework.Commons.LogTextHelper.Info ("test record"); string postString = string.Empty If (HttpContext.Current.Request.HttpMethod.ToUpper () = "POST") {using (Stream stream = HttpContext.Current.Request.InputStream) {Byte [] postBytes = new Byte [stream.Length]; stream.Read (postBytes, 0, (Int32) stream.Length) PostString = Encoding.UTF8.GetString (postBytes);} if (! string.IsNullOrEmpty (postString)) {Execute (postString);}} else {Auth ();}}

Execute (postString); is the message handling function, which implements the process of distributing different messages.'

/ process various request information and reply (request via POST) / data submitted by POST private void Execute (string postStr) {WeixinApiDispatch dispatch = new WeixinApiDispatch (); string responseContent = dispatch.Execute (postStr); HttpContext.Current.Response.ContentEncoding = Encoding.UTF8 HttpContext.Current.Response.Write (responseContent);}

The WeixinApiDispatch inside is a distribution management class, which extracts the content of the request message, constructs different types of message parameters, passes them to different response functions for processing, and then returns the encapsulated XML content as a response.

The specific code processing logic is shown in the following figure.

This message processing interface actually defines a series of processing operations for request messages. The parameters are different message objects. The specific code definition is shown below (due to space, some of the interfaces are omitted. For more information, please refer to the figure above).

/ data interface requested by the client / public interface IWeixinAction {/ A text request message is processed / text information entity / string HandleText (RequestText info) / A processing of picture request information / picture information entity / string HandleImage (RequestImage info) / A subscription request event is processed / subscription request event Information entity / string HandleEventSubscribe (RequestEventSubscribe info) / A pair of menu click request events are processed / menu click request event information entity / string HandleEventClick (RequestEventClick info);.. }

As can be seen from the above code, different messages are passed in the form of different message entity classes (note: the entity class is defined by me according to the needs of program development, not Wechat's own entity class). This is very convenient for us to deal with the operation, otherwise we need to parse different message content every time, it is easy to have problems, such a strongly typed data type It improves the robustness and efficiency of our Wechat application development. The objects of these entity classes have a certain inheritance relationship, which is shown below.

2. The management interface of Wechat

The above message classification is the message request operation sent by the Wechat server to the developer server, and there is also a kind of message, which is the message request or response made by the developer server to the Wechat server. This is temporarily called Wechat's management interface, which indicates that we can perform relevant message reply or data management operations through these interfaces. Its classification diagram is shown below.

Wechat's reply message processing, like the information in the above section, is also inherited from the BaseMessage entity class (similarly, the entity class in the following figure and its inheritance relationship are also customized to facilitate program development), and its relationship is as follows

Reply messages, generally use the most text messages and picture and text messages.

The effect of a text message is as follows.

Picture and text messages, you can add pictures, you can also add detailed link pages, is a very good-looking effect, for some more content, want to show a better effect, generally use this, the effect is shown below.

After reading this article, I believe you have some understanding of "sample Analysis of Wechat message processing and responses in the Development of Wechat Portal and applications by C#". If you want to know more about it, you are welcome to follow the industry information channel. Thank you for reading!

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