這次帶給大家axios封裝fetch呼叫詳解，axios封裝fetch的注意事項有哪些，以下就是實戰案例，一起來看一下。
基礎axios用法請看axios官網
//依赖于axios对私有ajax进行修改
import Qs from 'qs'
import axios from 'axios'
import router from 'router/index'
import {errorPrompt, loading, closeLoading} from 'util/util'
export const status = {
SUCCESS: '100',
NET_ERR: '101', // 网络连接异常，请稍候再试
BIZ_ERR: '103', // 业务请求异常
NO_AUTH: '104'
}
export function fetch(options) {
return new Promise((resolve, reject) => {
let instance = axios.create({
baseURL: process.env.BASE_API,
timeout: 2000,
headers: {
// "tracecode": window.encodeURIComponent(JSON.stringify({"ua":"","cv":"20161230","token":"3dwo0onUUsPKVJcP8tk","os":"windows10","app":"kind","ws":"1*1","pkey":"f8caf7d7-a5d4-4710-b06f-28a922b6a467"}))
"tracecode": commonBizHeader(isManager(options)),
'Content-Type': 'application/x-www-form-urlencoded'
},
transformRequest: [function (data) {
// Do whatever you want to transform the data
let ret = ''
for (let it in data) {
ret += encodeURIComponent(it) + '=' + encodeURIComponent(data[it]) + '&'
}
return ret
}]
});
instance.interceptors.request.use(function (response) {
// 请求拦截
loading();
return response;
}, function (error) {
console.log('error 请求拦截 : ', error)
return Promise.reject(error);
});
instance(options)
.then(response => {
const res = response.data;
if (res.errorCode != status.SUCCESS) {
switch (res.errorCode) {
case status.NET_ERR: {
errorPrompt(res.errorMsg)
reject(res)
break;
}
case status.BIZ_ERR: {
errorPrompt(res.errorMsg)
reject(res)
break;
}
case status.NO_AUTH: {
errorPrompt(res.errorMsg)
let session = require("storejs")
if (isManager(options)) { // 管理端
session.remove("managerUserToken")
router.push({path: '/manager/login'})
} else {
session.remove("clientUserToken")
router.push({path: '/client/login'})
}
reject(res)
break
}
}
}
closeLoading();
resolve(res);
}).catch(error => {
closeLoading();
errorPrompt('网络连接错误，请检查您的网络')
console.log('error', error); // for debug
reject(error);
});
});
}
function commonBizHeader (isManager) {
let session = require("storejs");
let params = {}
params['ua'] = window.navigator.userAgent.toLowerCase()
params['cv'] = '123456'
params['ws'] = window.screen.height + '*' + window.screen.width
params['token'] = "123456"
params['os'] = window.navigator.appCodeName
if (isManager) {
params['token'] = session.get('managerUserToken') // 管理 - 用户令牌
} else {
params['token'] = session.get('clientUserToken') // 用户 - 用户令牌
}
params['app'] = 'kind'
let UUID = session.get('pkey')
if (!UUID) {
UUID = getUUID()
window.localStorage.setItem('pkey', UUID)
}
return encodeURIComponent(JSON.stringify(params))
}
function isManager(options) {
return options && options.url && options.url.indexOf("/api/worker") != -1
}
/**
* 获取UUID
* @returns {string}
*/
export function getUUID() {
let len = 32 // 32长度
let radix = 16 // 16进制
let chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('')
let uuid = []
let i
radix = radix || chars.length
if (len) {
for (i = 0; i < len; i++) {
uuid[i] = chars[0 | Math.random() * radix]
}
} else {
var r
uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-'
uuid[14] = '4'
for (i = 0; i < 36; i++) {
if (!uuid[i]) {
r = 0 | Math.random() * 16
uuid[i] = chars[(i === 19) ? (r & 0x3) | 0x8 : r]
}
}
}
return uuid.join('').toLowerCase()
}這是在vue的專案中：在api中呼叫方法如下(react剛開始學，還在做簡單demo)
import {fetch} from 'api/fetch'
export const callAuthCode = (userPhone) => {
return fetch({
url: '/api/auth/code',
method: 'post',
data: ({
userPhone: userPhone,
}),
})
}因為我們這邊的後台要求嚴格區分get/post請求，所以封裝的方法調用中必須帶有method,如後台已經處理好，全部可進行post請求，則可以參考axios官網裡面將方法全部改為.post
關於fetch方法的說明：主要進行封裝了請求攔截，響應攔截，默認請求體由json格式轉換form格式，當然，這些都是在axios官網裡可以找到的，不過是集合下了而已
關於請求頭部分請不要直接套用，這是我們這邊後台要求特殊配置的，後台接口三端共用，必須區分是哪裡在調用
相信看了本文案例你已經掌握了方法，更多精彩請關注php中文網其它相關文章！
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