智慧宿舍系统小程序

wechat/miniprogram/utils/request.js

@@ -0,0 +1,107 @@
+const CryptoJs = require('crypto-js');
+const HmacSHA1 = require('crypto-js').HmacSHA1;
+const { Base64,Utf8 } = require('crypto-js').enc;
+const application = 'YoWrZ2mYoZc'; //app_key
+const appSecret = 'qGJEtGEyfj';  //app_secret
+
+//获取服务器返回的时间戳
+const getTimestamp=()=>{
+  return new Promise((resolve,reject)=>{
+    wx.request({
+      url: 'https://ag-api.ctwing.cn/echo',
+      timeout: 0,
+      success: (result) => {
+        resolve(result.header['x-ag-timestamp'])
+      },
+      fail: (err)=>{
+        reject(err)
+      }
+    })
+  })
+};
+//计算时间偏移量offset
+const getOffset = async ()=>{
+  const start = (new Date()).valueOf(); //获取当前系统时间戳
+  const time = await getTimestamp();
+  const end = (new Date()).valueOf();
+  const offset = Math.round(time - (start + end)/2);
+  return offset;
+};
+
+//对象按名称ASCII码排序
+function sort_ASCII(obj){
+  var arr = new Array();
+  var num = 0;
+  for (var i in obj) {
+    arr[num] = i;
+    num++;
+  }
+  //sort方法让数组元素按ASCII码排序
+  var sortArr = arr.sort();
+  var sortObj = {};
+  for (var i in sortArr) {
+    sortObj[sortArr[i]] = obj[sortArr[i]];
+  }
+  return sortObj;
+}
+
+//将公共参数封装到请求中
+//url 请求地址 + 路径
+//method 请求方式
+//version API版本号
+//data 对象格式 非公共请求参数,如果不是必选参数，可以给其赋予空值，例如 { "pageSize":"" }
+//body 请求体参数
+export const request = async (url,method,version,data,body)=>{
+  data = (sort_ASCII(data)) || null;
+  const offset = await getOffset();
+  const timestamp = (new Date()).valueOf() + offset;
+  let params = data;
+  let Data = {
+    'application':application,
+    'timestamp':timestamp,
+    ...data
+  };
+  //生成要签名的字符串
+  let dataStr = JSON.stringify(Data).replace(/[\"|\{]/g,'').replace(/[\,|\}]/g,'\n'); 
+  if(body && body!== {}){
+    dataStr += (JSON.stringify(body).concat('\n'));
+    params = body;
+    if (data && Object.keys(data).length>1) {
+      let query = '';
+      for(let k in data){
+        if (k === 'MasterKey') {
+          continue;
+        } 
+        query += `${ k }=${ data[k] }&`;
+      }
+      url = `${ url }?${ query }`
+    }
+  }
+
+  //生成签名
+  const signature = Base64.stringify(HmacSHA1(dataStr.toString(Utf8),appSecret));
+  let header = {
+        'application':application,
+        'signature':signature,
+        'timestamp':timestamp,
+        'version':version
+  };
+  if (data.MasterKey) {
+    header.MasterKey = data.MasterKey;
+  }
+  return new Promise((resolve,reject)=>{
+    wx.request({
+      url: `https://${ url }`,
+      method:method,
+      data: params,
+      //公共参数封装到请求头
+      header:header,
+      success: (result) => {
+        resolve(result);
+      },
+      fail: (res) => {
+        reject(res);
+      },
+    })
+  })
+}