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Use axios to upload files in vue

Jun 19, 2018 pm 04:43 PM

axios vue File Upload progress bar

I have been learning axios recently, and then used it in the project, so this article mainly introduces you to the relevant information about using axios in vue to realize real-time update of file upload progress. The article first gives a brief introduction to axios and the method. Everyone understands learning. Friends who need it can learn together below.

axios Introduction

axios is a Promise-based HTTP client for browsers and nodejs. It has the following characteristics:

Create XMLHttpRequest from the browser
Issue an http request from node.js
Support Promise API
Interception of requests and responses
Convert request and response data
Cancel request
Automatically convert JSON data
The client supports preventing CSRF/XSRF

Introduction method:

$ npm install axios
//使用淘宝源
$ cnpm install axios
//或者使用cdn：
&lt;script src=&quot;https://unpkg.com/axios/dist/axios.min.js&quot;&gt;&lt;/script&gt;

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When installing other plug-ins, you can directly introduce them in main.js and use Vue.use() to register, but axios is not a vue plug-in, so you cannot use Vue.use (), so it can only be introduced immediately in each component that needs to send a request.

In order to solve this problem, after introducing axios, we modified the prototype chain to make it more convenient to use.

//main.js

import axios from &#39;axios&#39;
Vue.prototype.$http = axios

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After adding these two lines of code to main.js, you can use the $http command directly in the component's methods

methods: {
postData () {
this.$http({
method: &#39;post&#39;,
url: &#39;/user&#39;,
data: {
name: &#39;xiaoming&#39;,
info: &#39;12&#39;
}
})
}

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For more basic knowledge, you can refer to this article: //www.jb51.net/article/110324.htm

##vue uses axios to realize real-time update of file upload progress

The progress event has been added to the XHR level 2, whereby we can add a real-time data progress bar while the browser is receiving new data, thus making the interaction more friendly

vue template

&lt;p class=&quot;progress&quot; @click=&quot;upload&quot;
   :style=&quot;{backgroundImage:&#39;linear-gradient(to right,#C0C7CB 0%,#C0C7CB &#39;+progress+&#39;,#E1E6E9 &#39;+progress+&#39;,#E1E6E9 100%)&#39;}&quot;&gt;

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vue-js

 var form = new FormData()
 form.append(&#39;file&#39;, vm.$refs.upload.files[0])
 form.append(&#39;id&#39;, id)
 form.append(&#39;type&#39;, type)
 var config = {
  onUploadProgress: progressEvent =&gt; {
   var complete = (progressEvent.loaded / progressEvent.total * 100 | 0) + &#39;%&#39;
   this.progress = complete
  }
 }
 axios.post(`api/uploadFile`,
  form, config).then((res) =&gt; {
  if (res.data.status === &#39;success&#39;) {
   console.log(&#39;上传成功&#39;)
  }
 })

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The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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