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This article mainly introduces how to achieve request message de-duplication in the development of Wechat public platform, which has a certain reference value. Interested friends can refer to it. I hope you will learn a lot after reading this article. Let the editor take you to know it.

In order to ensure the arrival rate of the information request message, the Wechat server will send the same request message (RequestMessage) many times without receiving the response message (ResponseMessage) in time, and all the text contents, including MsgId, etc., are consistent.

This mechanism ensures the success rate of reply to messages in situations such as poor network conditions, but sometimes repeated messages become a burden on the server because of the load on the server and the request process takes several seconds to complete. even business and data can be affected.

In view of this situation, SDK has added a deduplication setting, so you only need to add a sentence when using MessageHandler:

MessageHandler.OmitRepeatedMessage = true;// enables message deduplication / [HttpPost] [ActionName ("MiniPost")] public ActionResult MiniPost (string signature, string timestamp, string nonce, string echostr) {if (! CheckSignature.Check (signature, timestamp, nonce, Token)) {return new WeixinResult ("Parameter error!") ; / / v0.8 +} var messageHandler = new CustomMessageHandler (Request.InputStream, null, 10); messageHandler.OmitRepeatedMessage = true;// enable message deduplication function messageHandler.Execute (); / / execute Wechat process return new FixWeixinBugWeixinResult (messageHandler);}

The principle of deduplication is to judge whether the MsgId of the current request message is consistent with that of the previous request message through the context of the current user, and if so, the downward execution is terminated.

File: Senparc.Weixin.MessageHandlers.MessageHandler.cs

Public virtual void OnExecuting () {if (OmitRepeatedMessage & & CurrentMessageContext.RequestMessages.Count > 1) {var lastMessage = CurrentMessageContext.RequestMessages [CurrentMessageContext.RequestMessages.Count-2]; if (lastMessage.MsgId! = 0 & & lastMessage.MsgId = = RequestMessage.MsgId) {CancelExcute = true / / repeat message, cancel execution} Thank you for reading this article carefully. I hope the article "how to achieve request message de-duplication in the development of Wechat public platform" shared by the editor will be helpful to everyone. At the same time, I also hope that you will support me and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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