反应:Axios网络错误

问题描述

这是我第一次使用axios，遇到错误.

This is my first time using axios and I have encountered an error.

  axios.get(
    `http://someurl.com/page1?param1=1&param2=${param2_id}`
  )
  .then(function(response) {
    alert();
  })
  .catch(function(error) {
    console.log(error);
  });

使用正确的url和参数，当我检查网络请求时，确实可以从服务器中获得正确的答案，但是当我打开控制台时，我看到它没有调用回调，而是捕获了错误.

With the right url and parameters, when I check network requests I indeed get the right answer from my server, but when I open console I see that it didn't call the callback, but instead it caught an error.

推荐答案

如果使用NodeJS创建API

---

您的Express应用程序需要使用CORS(跨源资源共享).将以下内容添加到您的服务器文件中:

If Creating an API Using NodeJS

---

Your Express app needs to use CORS (Cross-Origin Resource Sharing). Add the following to your server file:

// This should already be declared in your API file
var app = express();

// ADD THIS
var cors = require('cors');
app.use(cors());

要更全面地了解CORS，请阅读有关CORS的Mozilla文档.

For fuller understanding of CORS, please read the Mozilla Documentation on CORS.

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