How to handle the interception and unified processing of network requests in Vue technology development

How to handle the interception and unified processing of network requests in Vue technology development

As a popular front-end development framework, Vue can easily be used through its built-in axios library Make a network request. In actual development, we often need to intercept and uniformly process network requests to implement some common functions, such as authentication, error handling, etc. This article will introduce how to intercept and uniformly process network requests in Vue development, and provide specific code examples.

1. The concept and function of interceptors

Before introducing the specific processing methods, let’s first understand the concept and functions of interceptors. Interceptors are functions that preprocess network requests and responses. It can intervene before sending a request, when sending a request, and when receiving a response to achieve some common functions. Interceptors are very useful in Vue development. They can handle some business logic in a unified manner and reduce code duplication.

2. Interception and unified processing of requests

Next, we will introduce in detail how to intercept and uniformly process network requests in Vue development.

1. Create axios instance

First, we need to create an axios instance for sending network requests. The following code can be added to the main.js file in the project:

import axios from 'axios'
 
const service = axios.create({
  // 在这里可以进行一些全局的配置
  // ...
})
 
export default service

2. Request Interceptor

Then, we can add the request interceptor to the created axios instance , processed before sending the request. You can add the following code to the service.js file:

import service from './service'
 
service.interceptors.request.use(
  config => {
    // 在发送请求之前做一些处理
    // ...
    return config
  },
  error => {
    // 请求错误时做一些处理
    // ...
    Promise.reject(error)
  }
)

In the request interceptor, we can perform some processing operations on the request, such as adding request headers, authentication, adding loading, etc. It should be noted that if an error occurs in the interceptor, the Promise.reject() method needs to be used to throw the error for subsequent processing.

3. Response interceptor

In addition to request interceptors, we can also add response interceptors to process the response after receiving it. You can add the following code to the service.js file:

service.interceptors.response.use(
  response => {
    // 在接收到响应后做一些处理
    // ...
    return response
  },
  error => {
    // 响应错误时做一些处理
    // ...
    return Promise.reject(error)
  }
)

In the response interceptor, we can perform some processing operations on the response, such as processing error information, unified processing of successful responses, etc.

4. Unified error handling

In the response interceptor, we can handle errors uniformly. For example, we can judge based on the error status code and then return different error messages to the user. You can add the following code to the service.js file:

import { Message } from 'element-ui'
 
service.interceptors.response.use(
  response => {
    // 在接收到响应后做一些处理
    // ...
    return response
  },
  error => {
    // 响应错误时做一些处理
    if (error.response) {
      switch (error.response.status) {
        case 401:
          // 鉴权失败
          // ...
          break
        case 404:
          // 请求资源不存在
          // ...
          break
        // 其他错误处理
        // ...
      }
    }
    // 在页面显示错误信息
    Message.error(error.message)
    return Promise.reject(error)
  }
)

In the above code, we use the Message component in the element-ui library to pop up the error message, which can be modified accordingly according to the needs of the actual project.

3. Summary

Through the introduction of the concept and function of interceptors, we learned how to handle the interception and unified processing of network requests in Vue development. In actual projects, we can implement some common functions through interceptors, improve development efficiency, and reduce code duplication. The above is just a demonstration. In actual development, we can make corresponding adjustments and expansions according to specific needs. I hope this article can be helpful to you in handling the interception and unified processing of network requests in Vue development.

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