http statusCode有时未定义 [英] http statusCode sometimes undefined

问题描述

我在node.js（express）应用程序中使用请求模块。有时会发生与statusCode相关的错误：

I'm using request module in my node.js(express) application. Sometimes this statusCode related error occurs:

TypeError: Cannot read property
'statusCode' of undefined at Request._callback

这是我的全部代码：

request("https://www.googleapis.com/youtube/v3/search?part=snippet&q=" + docs[0].title + "&type=video&key=(some-key-variable)", {
                json: true
              }, function(error, response, resultData) {
                var yArr = [];
                if (!error || response.statusCode == 200) {
                  for (var i = 0; i < config.youtubeVideoCount; i++) {
                    var vArr = resultData.items[i];
                    yArr.push(vArr);
                  }
                } else {
                  console.log("can't find video");
                }
              });

response.statusCode 有时会出错。如何控制请求成功？它是请求模块中的错误吗？为什么statusCode有时会被定义？我认为statusCode应该每次都可用。

response.statusCode gives an error sometimes. How can I control that the request is successful? Is it bug in the request module? Why is statusCode undefined sometimes? I think statusCode should be available every time.

答案
可能是响应超时问题，你应该做一个if语句这个;

Answer Probably it is response timeout issue and u should do an if statement like this;

if (response === undefined || response.statusCode != 200){ console.log("there is a prob"); }

这段代码首先控制响应变量然后是response.statuscode，所以如果响应未定义则不控制响应.statusCode因此，我们不能得到任何错误。

this code firstly control response variable and then response.statuscode , so if response undefined don't control response.statusCode thus , we can't get any error.

推荐答案

这是一种解决方法，因为可能有几个原因回复是未定义：

This is a workaround, as there might be several reasons why response is undefined:

if (!error && response.statusCode == 200) {
    // do your stuff here..
}

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