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Ordinary Web development, is to save the sessionid in cookie transfer.

Whether it is java or php, the server will add Set-Cookie to the header of response

Response HeadersContent-Type:application/json;charset=UTF-8Date:Mon, 02 Apr 2018 16:02:42 GMTSet-Cookie:JSESSIONID=781C7F500DFA24D663BA243A4D9044BC;path=/yht;HttpOnly browser request will also be added to header

Through this sessionid, Request HeadersAccept:*/*Accept-Encoding:gzip, deflate, and brAccept-Language:zh-CN,zh;q=0.8Cache-Control:no-cacheConnection:keep-aliveContent-Length:564content-type:application/jsonCookie:JSESSIONID=781C7F500DFA24D663BA243A4D9044BC;path=/yht;HttpOnly can maintain a conversation between the browser and the server, and keep the browser in the login state.

However, WeChat Mini Programs cannot save the Cookie, which causes a new session to be created every time the wx.request goes to the server, and the mini program cannot keep the login state.

The simple processing methods are as follows:

1. Save the value in the Set-Cookie of the server response to Storage

Wx.request ({

Url: path

Method:method

Header: header

Data:data

Success:function (res) {

If (res & & res.header & & res.header ['Set-Cookie']) {

Wx.setStorageSync ('cookieKey', res.header [' Set-Cookie']); / / Save Cookie to Storage

}

}

Fail:fail

})

Wx.request then takes the Cookie out of Storage and encapsulates it into header

Let cookie = wx.getStorageSync ('cookieKey')

Let path=conf.baseurl+url

Let header = {}

If (cookie) {

Header.Cookie=cookie

}

Wx.request ({

Url: path

Method:method

Header: header

Data:data

Success:success

Fail:fail

})

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