first commit

cloudfunctions/getOpenId/config.json

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+{
+  "permissions": {
+    "openapi": []
+  }
+}

cloudfunctions/getOpenId/index.js

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+// 云函数入口文件
+const cloud = require('wx-server-sdk')
+
+cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV })
+
+// 云函数入口函数
+exports.main = async (event, context) => {
+    const wxContext = cloud.getWXContext()
+
+    return {
+        openid: wxContext.OPENID
+    }
+}

cloudfunctions/getOpenId/package.json

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+{
+  "name": "getOpenId",
+  "version": "1.0.0",
+  "description": "获取用户OpenID",
+  "main": "index.js",
+  "dependencies": {
+    "wx-server-sdk": "~3.0.1"
+  }
+}