19-01-28
1

因为我的应用用到了国外的API，小程序方不允许通过，我就用leancloud的云引擎做了一次中转，原本的API访问返回时间为1.16s。用了云引擎访问，获取返回值，然后我在小程序中调用云函数后，返回时间为10s+。因为原因是什么？

我访问的API为 https://traffic.krashnz.com/api/v2/public/server/ets2/eu2/traffic.json2

云函数用的在线编写格式为

return new Promise(function(resolve,reject){
    var nodeRequest = require('request');
    var trafficUrlArray = [
        "https://traffic.krashnz.com/api/v2/public/server/ets2/eu1/traffic.json",
        "https://traffic.krashnz.com/api/v2/public/server/ets2/eu2/traffic.json",
        "https://traffic.krashnz.com/api/v2/public/server/ets2/eu3/traffic.json",
        "https://traffic.krashnz.com/api/v2/public/server/ets2/eu4/traffic.json",
        "https://traffic.krashnz.com/api/v2/public/server/ets2/eu5/traffic.json"
        ];
    var serverId = request.params.id;
    var url = trafficUrlArray[serverId];
    var option ={
      url: url,
      method: "GET",
      json: true,
      headers: {
          "content-type": "application/json",
      },
    }
    nodeRequest(option, function(error, response, body) {
      if (!error && response.statusCode == 200) {
          resolve(body);
      }
    });
});