Solution to the problem of vue2.0 axios cross-domain rendering

Below I will share with you a solution to the problem of vue2.0 axios cross-domain rendering. It has a good reference value and I hope it will be helpful to everyone.

(Scaffolding vue-cli used)

Step one: Use the following declaration in main.js

import axios from 'axios'; Vue.prototype.$axios=axios;

Then in other vue components you can call this.$axios and use

Step 2: Configure proxyTable(config in webpack index.js under)

dev: { 加入以下 proxyTable: { '/api': { target: 'http://api.douban.com',//设置你调用的接口域名和端口号 别忘了加http changeOrigin: true, pathRewrite: { '^/api': '/'//这里理解成用‘/api'代替target里面的地址，后面组件中我们掉接口时直接用api代替 比如我要调用'http://api.douban.com/v2/movie/top250'，直接写‘/api/v2/movie/top250'即可 } } },

##Step Three:

Try it, the cross-domain is successful, but please note that this is only a cross-domain problem solved in the development environment (dev). In the production environment, if it is actually deployed on the server, there will still be cross-domain problems if it is not from the same origin, as in our case The deployed server port is 3001, which requires front-end and back-end joint debugging. In the first step, we can test the front-end in two environments: production and development. In config/dev.env.js and prod.env.js, it is development/ In the production environment, configure the requested address API_HOST respectively. In the development environment, we use the proxy address api configured above. In the production environment, we use the normal interface address, so configure it like this

module.exports = merge(prodEnv, { NODE_ENV: '"development"',//开发环境 API_HOST:"/api/" })

module.exports = { NODE_ENV: '"production"',//生产环境 API_HOST:'"http://api.douban.com"' }

Of course, you can directly request http://api.douban.com whether it is a development or production environment. After configuration, the program will automatically determine whether the current environment is development or production during testing, and then automatically match API_HOST. We can use process.env.API_HOST in any component to use addresses such as

instance.post(process.env.API_HOST+'user/login', this.form)

Then in the second step, the back-end server can configure cros cross-domain, which is access-control-allow-origin: * means allowing all access. To sum up: In the development environment, our front-end can configure a proxy to cross-domain. In a real production environment, we need the cooperation of the back-end. A certain expert said: This method is not easy to use in IE9 and below. If compatibility is required, the best way is to add a proxy to the server port on the backend. The effect is similar to the webpack proxy during development.

Step 4:

The above is what I compiled for everyone, I hope It will be helpful to everyone in the future.

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