VUE2中axios的使用方法

一，安装

　　npm install axios

二，在http.js中引入

　　import axios from 'axios';

三，定义http request 拦截器，添加数据请求公用信息

axios.interceptors.request.use(
    config => {
        // const token = getCookie('名称');注意使用的时候需要引入cookie方法，推荐js-cookie
        //config.data = JSON.stringify(config.data);
        let token = localStorage.token;
        //let token = 'xxx';
        let appid = 'xxx';
        let appID = decodeURIComponent(appid);
        config.headers.token = token;
        //config.headers['Content-Type'] = 'application/x-www-form-urlencoded';

        if (config.method == 'get') {
            config.params.app_id = appID
            config.params.token = token
        }
        if (config.method == 'post') {
            config.data.token = token
            config.data.app_id = appID
        }

        return config;
    },
    error => {
        return Promise.reject(err);
    }
);

四，封装get方法

export function get(url, params = {}) {

    return new Promise((resolve, reject) => {
        axios.get(url, {
                params: params
            })
            .then(response => {
                resolve(response.data);
            })
            .catch(err => {
                reject(err)
            })
    })
}

五，封装post方法

export function post(url, params = {}) {

    return new Promise((resolve, reject) => {
        axios.post(url, params)
            .then(response => {
                resolve(response.data);
            }, err => {
                reject(err)
            })
    })
}

六，封装patch请求

export function patch(url, data = {}) {
    return new Promise((resolve, reject) => {
        axios.patch(url, data)
            .then(response => {
                resolve(response.data);
            }, err => {
                reject(err)
            })
    })
}

七，封装put请求

export function put(url, data = {}) {
    return new Promise((resolve, reject) => {
        axios.put(url, data)
            .then(response => {
                resolve(response.data);
            }, err => {
                reject(err)
            })
    })
}

八，实现跨域

const downloadUrl = url => {
    let iframe = document.createElement('iframe')
    iframe.style.display = 'none'
    iframe.src = url
    iframe.onload = function() {
        document.body.removeChild(iframe)
    }
    document.body.appendChild(iframe)
}

九，方法的使用

　　在main.js里引入http.js

　　

import Vue from 'vue'
import App from './App'
import router from './router'
import axios from 'axios'
import {get, post } from '@/utils/http'

Vue.prototype.$ajax = axios;
Vue.prototype.$post = post;
Vue.prototype.$get = get;

　　在需要调用的地方

　　

this.$get(url).then((response) => {
               
    }
})

this.$post(url, data).then((response) => {
               
    }
})

this.$put(url, data).then((response) => {
               
    }
})

this.$patch(url, data).then((response) => {
               
    }
})