axios 使用

官网

https://axios-http.com/

安装

npm install axios

使用格式

axios.method({configs})
.then(function(response){
    //
})
.catch(function (error) {
    // handle error
    console.log(error);
})
.finally(function () {
    // always executed
});

axios函数

axios(config)
axios(url[, config])

实例：

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

别名请求方法

axios.request(config)
axios.get(url[, config])
axios.delete(url[, config])
axios.head(url[, config])
axios.options(url[, config])
axios.post(url[, data[, config]])
axios.put(url[, data[, config]])
axios.patch(url[, data[, config]])
axios.postForm(url[, data[, config]])
axios.putForm(url[, data[, config]])
axios.patchForm(url[, data[, config]])

config 支持的参数：https://axios-http.com/docs/req_config

HTTP GET

axios.get('/user?ID=12345', {
    params: {
      ID: 12345
    }
  })
  .then(function (response) {
    // handle success
    console.log(response);
  })
  .catch(function (error) {
    // handle error
    console.log(error);
  })
  .finally(function () {
    // always executed
  });

HTTP POST

axios.post('/user', {
    firstName: 'Fred',
    lastName: 'Flintstone'
  })
  .then(function (response) {
    console.log(response);
  })
  .catch(function (error) {
    console.log(error);
  });

HTTP POST multipart

const {data} = await axios.post('https://httpbin.org/post', {
    firstName: 'Fred',
    lastName: 'Flintstone',
    orders: [1, 2, 3],
    photo: document.querySelector('#fileInput').files
  }, {
    headers: {
      'Content-Type': 'multipart/form-data'
    }
  }
)

支持的请求参数

config 支持的参数：https://axios-http.com/docs/req_config

优先级：请求配置 > 实例配置 > 全局配置

返回的数据格式(Response Schema)

https://axios-http.com/docs/res_schema

默认配置（Config Defaults）

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';

处理错误(Handling Errors)

axios.get('/user/12345')
  .catch(function (error) {
    if (error.response) {
      // The request was made and the server responded with a status code
      // that falls out of the range of 2xx
      console.log(error.response.data);
      console.log(error.response.status);
      console.log(error.response.headers);
    } else if (error.request) {
      // The request was made but no response was received
      // `error.request` is an instance of XMLHttpRequest in the browser and an instance of
      // http.ClientRequest in node.js
      console.log(error.request);
    } else {
      // Something happened in setting up the request that triggered an Error
      console.log('Error', error.message);
    }
    console.log(error.config);
  });

拦截器(Interceptors)

官方文档：https://axios-http.com/docs/interceptors
请求拦截器

// Add a request interceptor
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);
});

响应拦截器

// Add a response interceptor
axios.interceptors.response.use(function (response) {
    // Any status code that lie within the range of 2xx cause this function to trigger
    // Do something with response data
    return response;
  }, function (error) {
    // Any status codes that falls outside the range of 2xx cause this function to trigger
    // Do something with response error
    return Promise.reject(error);
  });

取消请求

官方文档：https://axios-http.com/docs/cancellation

取消单个请求

const CancelToken = axios.CancelToken;
let cancel;

axios.get('/user/12345', {
  cancelToken: new CancelToken(function executor(c) {
    // An executor function receives a cancel function as a parameter
    cancel = c;
  })
});

// cancel the request
cancel();

取消多个请求

const CancelToken = axios.CancelToken;
let cancel1;
let cancel2;

axios.get('/abc.pdf', {
    timeout:50000,
    cancelToken: new CancelToken(function executor(c) {
        // An executor function receives a cancel function as a parameter
        cancel1 = c;
    })
});

axios.get('/abc.pdf', {
    timeout:50000,
    cancelToken: new CancelToken(function executor(c) {
        // An executor function receives a cancel function as a parameter
        cancel2 = c;
    })
});

// cancel the request
cancel1();
cancel2();

Async

// Want to use async/await? Add the `async` keyword to your outer function/method.
async function getUser() {
  try {
    const response = await axios.get('/user?ID=12345');
    console.log(response);
  } catch (error) {
    console.error(error);
  }
}

等待任务全部完成

function getUserAccount() {
  return axios.get('/user/12345');
}

function getUserPermissions() {
  return axios.get('/user/12345/permissions');
}

const [acct, perm] = await Promise.all([getUserAccount(), getUserPermissions()]);

// 或者

Promise.all([getUserAccount(), getUserPermissions()])
  .then(function ([acct, perm]) {
    // ...
  });