Vue中发送ajax请求——axios使用详解

vue

axios

基于 Promise 的 HTTP 请求客户端,可同时在浏览器和 node.js 中使用

功能特性

  • 在浏览器中发送 XMLHttpRequests 请求
  • 在 node.js 中发送 http请求
  • 支持 Promise API
  • 拦截请求和响应
  • 转换请求和响应数据
  • 自动转换 JSON 数据
  • 客户端支持保护安全免受 XSRF 攻击

浏览器支持

安装

使用 bower:

$ bower install axios

使用 npm:

$ npm install axios

例子

发送一个 GET 请求

// Make a request for a user with a given ID 

axios.get(\'/user?ID=12345\')

.then(function (response) {

console.log(response);

})

.catch(function (response) {

console.log(response);

});

// Optionally the request above could also be done as

axios.get(\'/user\', {params: {ID: 12345}})

.then(function (response) {

console.log(response);

})

.catch(function (response) {

console.log(response);

});

发送一个 POST 请求

axios.post(\'/user\', {firstName: \'Fred\', lastName: \'Flintstone\'})

.then(function (response) {

console.log(response);

})

.catch(function (response) {

console.log(response);

});

发送多个并发请求

function getUserAccount() {

return axios.get(\'/user/12345\');

}

function getUserPermissions() {

return axios.get(\'/user/12345/permissions\');

}

axios.all([getUserAccount(), getUserPermissions()])

.then(axios.spread(function (acct, perms) {

// Both requests are now complete

}));

axios API

可以通过给 axios传递对应的参数来定制请求:

axios(config)

// Send a POST request

axios(

{

method: \'post\',

url: \'/user/12345\',

data: {

firstName: \'Fred\',

lastName: \'Flintstone\'

}

});

axios(url[, config])

// Sned a GET request (default method) 

axios(\'/user/12345\');

请求方法别名

为方便起见,我们为所有支持的请求方法都提供了别名

axios.get(url[, config])

axios.delete(url[, config])

axios.head(url[, config])

axios.post(url[, data[, config]])

axios.put(url[, data[, config]])

axios.patch(url[, data[, config]])

注意

当使用别名方法时, url、 method 和 data 属性不需要在 config 参数里面指定。

并发

处理并发请求的帮助方法

axios.all(iterable)

axios.spread(callback)

创建一个实例

你可以用自定义配置创建一个新的 axios 实例。

axios.create([config])

var instance = axios.create({

baseURL: \'https://some-domain.com/api/\',

timeout: 1000,

headers: {\'X-Custom-Header\': \'foobar\'}

});

实例方法

所有可用的实例方法都列在下面了,指定的配置将会和该实例的配置合并。

axios#request(config)

axios#get(url[, config])

axios#delete(url[, config])

axios#head(url[, config])

axios#post(url[, data[, config]])

axios#put(url[, data[, config]])

axios#patch(url[, data[, config]])

请求配置

下面是可用的请求配置项,只有 url 是必需的。如果没有指定 method ,默认的请求方法是 GET

{

// `url` is the server URL that will be used for the request

url:\'/user\',

// `method` is the request method to be used when making the request

method: \'get\', // default

// `baseURL` will be prepended to `url` unless `url` is absolute.

// It can be convenient to set `baseURL` for an instance of axios to pass relative URLs

// to methods of that instance.

baseURL: \'https://some-domain.com/api/\',

// `transformRequest` allows changes to the request data before it is sent to the server

// This is only applicable for request methods \'PUT\', \'POST\', and \'PATCH\'

// The last function in the array must return a string or an ArrayBuffer

transformRequest: [function (data) {

// Do whatever you want to transform the data return data;

}],

// `transformResponse` allows changes to the response data to be made before

// it is passed to then/catch

transformResponse: [function (data) {

// Do whatever you want to transform the data return data;

}],

// `headers` are custom headers to be sent

headers: {\'X-Requested-With\': \'XMLHttpRequest\'},

// `params` are the URL parameters to be sent with the request

params: { ID: 12345 };

// `paramsSerializer` is an optional function in charge of serializing `params`

// (e.g. https://www.npmjs.com/package/qs, http://api.jquery.com/jquery.param/)

paramsSerializer: function(params) {

return Qs.stringify(params, {arrayFormat: \'brackets\'})

},

// `data` is the data to be sent as the request body

// Only applicable for request methods \'PUT\', \'POST\', and \'PATCH\'

// When no `transformRequest` is set, must be a string, an ArrayBuffer or a hash

data: { firstName: \'Fred\' },

// `timeout` specifies the number of milliseconds before the request times out.

// If the request takes longer than `timeout`, the request will be aborted.

timeout: 1000,

// `withCredentials` indicates whether or not cross-site Access-Control requests

// should be made using credentials

withCredentials: false, // default

// `adapter` allows custom handling of requests which makes testing easier.

// Call `resolve` or `reject` and supply a valid response (see [response docs](#response-api)).

adapter: function (resolve, reject, config) { /* ... */ },

// `auth` indicates that HTTP Basic auth should be used, and supplies credentials.

// This will set an `Authorization` header, overwriting any existing

// `Authorization` custom headers you have set using `headers`.

auth: { username: \'janedoe\', password: \'s00pers3cret\' }

// `responseType` indicates the type of data that the server will respond with

// options are \'arraybuffer\', \'blob\', \'document\', \'json\', \'text\'

responseType: \'json\', // default

// `xsrfCookieName` is the name of the cookie to use as a value for xsrf token

xsrfCookieName: \'XSRF-TOKEN\', // default

// `xsrfHeaderName` is the name of the http header that carries the xsrf token value

xsrfHeaderName: \'X-XSRF-TOKEN\', // default

// `progress` allows handling of progress events for \'POST\' and \'PUT uploads\' as well as \'GET\' downloads

progress: function(progressEvent) {

// Do whatever you want with the native progress event

}

}

响应的数据结构

响应的数据包括下面的信息:

{ 

// `data` is the response that was provided by the server

data: {},

// `status` is the HTTP status code from the server response

status: 200,

// `statusText` is the HTTP status message from the server response

statusText: \'OK\',

// `headers` the headers that the server responded with

headers: {},

// `config` is the config that was provided to `axios` for the request

config: {}

}

当使用 then 或者 catch 时, 你会收到下面的响应:

axios.get(\'/user/12345\').then(function (response) {

console.log(response.data);

console.log(response.status);

console.log(response.statusText);

console.log(response.headers);

console.log(response.config);

});

默认配置

你可以为每一个请求指定默认配置。

全局 axios 默认配置

axios.defaults.baseURL = \'https://api.example.com\';

axios.defaults.headers.common[\'Authorization\'] = AUTH_TOKEN;

axios.defaults.headers.post[\'Content-Type\'] = \'application/x-www-form-urlencoded\';

自定义实例默认配置

// Set config defaults when creating the instance 

var instance = axios.create({baseURL: \'https://api.example.com\'});

// Alter defaults after instance has been created

instance.defaults.headers.common[\'Authorization\'] = AUTH_TOKEN;

配置的优先顺序

Config will be merged with an order of precedence. The order is library defaults found in lib/defaults.js, then defaults property of the instance, and finally config argument for the request. The latter will take precedence over the former. Here\'s an example.

// Create an instance using the config defaults provided by the library 

// At this point the timeout config value is `0` as is the default for the library

var instance = axios.create();

// Override timeout default for the library

// Now all requests will wait 2.5 seconds before timing out

instance.defaults.timeout = 2500;

// Override timeout for this request as it\'s known to take a long time

instance.get(\'/longRequest\', {timeout: 5000});

拦截器

你可以在处理 then 或 catch 之前拦截请求和响应

// 添加一个请求拦截器 

axios.interceptors.request.use(function (config) {

// Do something before request is sent return config;

}, function (error) {

// Do something with request error return Promise.reject(error);

});

// 添加一个响应拦截器

axios.interceptors.response.use(function (response) {

// Do something with response data return response;

}, function (error) {

// Do something with response error return Promise.reject(error);

});

移除一个拦截器:

var myInterceptor = axios.interceptors.request.use(function () {

/*...*/

});

axios.interceptors.request.eject(myInterceptor);

你可以给一个自定义的 axios 实例添加拦截器:

var instance = axios.create();

instance.interceptors.request.use(function () {

/*...*/

});

错误处理

axios.get(\'/user/12345\').catch(function (response) {

if (response instanceof Error) {

// Something happened in setting up the request that triggered an Error

console.log(\'Error\', response.message);

} else {

// The request was made, but the server responded with a status code

// that falls out of the range of 2xx

console.log(response.data);

console.log(response.status);

console.log(response.headers);

console.log(response.config);

}

});

Promises

axios 依赖一个原生的 ES6 Promise 实现,如果你的浏览器环境不支持 ES6 Promises,你需要引入 polyfill

TypeScript

axios 包含一个 TypeScript 定义

/// <reference path="axios.d.ts" />

import * as axios from \'axios\';

axios.get(\'/user?ID=12345\');

Credits

axios is heavily inspired by the $http service provided in Angular. Ultimately axios is an effort to provide a standalone $http-like service for use outside of Angular.

License

MIT

转载:https://www.awesomes.cn/repo/mzabriskie/axios

以上是 Vue中发送ajax请求——axios使用详解 的全部内容, 来源链接: utcz.com/z/375944.html

回到顶部