如何将Gatsby与NodeJs Express后端集成 [英] How to integrate Gatsby with NodeJs Express Backend

问题描述

我将Gatsby作为前端，并使用NodeJs/Express来获取API数据.我用以下内容编辑了gatsby-config.js

I have Gatsby as my frontend and NodeJs/Express to fetch API data. I edited gatsby-config.js with the following

module.exports = {
  /* Your site config here */

  proxy: {
    prefix: "/api",
    url: "http://localhost:4000",
  },
}

要使其正常工作.

它在我的开发环境中有效，但在我运行gatsby生产版本时不起作用.当我运行gatsby生产版本并转到实时生产网站时，未获取nodeJS API数据.我缺少构建步骤.

It works in my development environment, but not when I run the gatsby production build. When I run the gatsby production build and go to the live production website, the nodeJS API data is not being fetched. I'm I missing a build step.

我愿意

gatsby构建

盖茨比服务

推荐答案

来自

请记住，代理仅对开发有效(使用gatsby 开发)，这取决于您确保/api/todos之类的网址 指向生产中的正确位置.

Keep in mind that proxy only has effect in development (with gatsby develop), and it is up to you to ensure that URLs like /api/todos point to the right place in production.

在生产中，您需要将HTML请求直接发送到后端服务器，而无需使用代理.使用类似 Axios 的库:

In production, you need to send your HTML requests directly to your backend server without a proxy. Use a library like Axios:

这是axios回购中有关POST请求的示例:

Here an example from the axios repo for a POST request:

// Send a POST request
axios({
  method: 'post',
  url: '/user/12345',
  data: {
    firstName: 'Fred',
    lastName: 'Flintstone'
  }
});

您的浏览器将遇到CORS块.您的后端需要设置正确的响应头，以便您的浏览器将接受响应.在您的Express应用中设置cors:

You will run into a CORS block by your browser. Your backend needs to set the right response header so your browser will accept the response. In your express app set the cors:

const Express = require("express");
const BodyParser = require("body-parser");
const cors = require("cors");

const app = Express();
app.use(BodyParser.text({ type: "text/plain" }));

/* CORS */
// app.use(cors()); // Enable cors for all origins
app.use(cors({
  /** Use this when web frontend / production **/
  // origin: 'https://example.com',

  /** Use this when local frontend / development **/
  origin: "http://localhost:8000",
}));

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