使用 JavaScript Axios/Fetch。 你能禁用浏览器缓存吗？

Question

I am trying to query a quote API for a freeCodeCamp project I'm updating to React.js. I am now trying to use Fetch or Axios to query the API but it's caching the response in the browser. I know in $ajax there is a { cache: false } that would force the browser to do a new request.

Is there some way I will be able to do the same with Fetch or Axios ?

The cache-control setting seems to be already set to max-age: 0 by Axios .

This is my code I have that is querying the API.

generateQuote = () => {
  axios.get('https://quotesondesign.com/wp-json/posts?filter[orderby]=rand&filter[posts_per_page]=1')
    .then(response => {
      const { title, content, link } = response.data[0];
      console.log(title, content, link)
      this.setState(() => ({ title, content, link }));
    })
    .catch(err => {
      console.log(`${err} whilst contacting the quote API.`)
    })

}

Answer 1

Okay so I found a solution. I had to set a timestamp on the API url to get it to make a new call. There doesn't seem to be a way to force axios or fetch to disable cache.

This is how my code now looks

axios.get(`https://quotesondesign.com/wp-json/posts?filter[orderby]=rand&filter[posts_per_page]=1&timestamp=${new Date().getTime()}`)
  .then(response => {
    const { title, content, link } = response.data[0];
    console.log(title, content, link)
    this.setState(() => ({ title, content, link }));
  })
  .catch(err => {
    console.log(`${err} whilst contacting the quote API.`)
  })

Answer 2

I added these headers to all axios requests and it's working well.

axiosInstance.defaults.headers = {
  'Cache-Control': 'no-cache',
  'Pragma': 'no-cache',
  'Expires': '0',
};

Answer 3

I think you just need to make the url different each time you make the axios call. Timestamp is just one way to do so. Also consider disabling or filtering service workers caching method if you are developing a PWA.

Answer 4

It seems, adding timestamp is the only always working way.

If you're using Vue, for example:

const api = axios.create({
  baseURL: 'https://example.com/api',
  params: {
    t: new Date().getTime()
  }
})
Vue.prototype.$api = api

So you can use it with:

this.$api.get('items')

And it will always add different timestamp to the url, depending on current request time.

Answer 5

Create an instance of axios and then add timestamp to every request.

const axiosInstance = axios.create({})

axiosInstance.interceptors.request.use(
    function (config) {
      // Do something before request is sent
      config.params = { ...config.params, timestamp: Date.now() };
      return config;
    },
    function (error) {
      // Do something with request error
      return Promise.reject(error);
    }
  );