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The knowledge points of this article "how to set up a communication domain name by WeChat Mini Programs" are not quite understood by most people, so the editor summarizes the following contents to you. The content is detailed, the steps are clear, and it has a certain reference value. I hope you can get something after reading this article. Let's take a look at this "how to set up a communication domain name by WeChat Mini Programs" article.

Each WeChat Mini Programs needs to set up a communication domain name in advance, and Mini Program can communicate with the specified domain name on the network. It includes normal HTTPS request (wx.request), WebSocket communication (wx.connectSocket), upload file (wx.uploadFile) and download file (wx.downloadFile).

Network API list:

API description wx.request initiates network request wx.uploadFile uploads file wx.downloadFile downloads file wx.connectSocket creates WebSocket connection wx.onSocketOpen listens WebSocket turns on wx.onSocketError snooping WebSocket error wx.sendSocketMessage sends WebSocket message wx.onSocketMessage accepts WebSocket message wx.closeSocket closes WebSocket connection wx.onSocketClose listens WebSocket closes Tip

Tip: the referer of a network request cannot be set, and the format is fixed as https://servicewechat.com/{appid}/{version}/page-frame.html, where {appid} is the appid of Mini Program, {version} is the version number of Mini Program, and a version number of 0 indicates the development version.

Tip: after Mini Program runs in the background (off-the-top chat), if the network request does not end within 5 seconds, the error message "fail interrupted" will be called back. Before returning to the foreground, the network request API call will fail.

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