axios的二次封装

import axios, { AxiosInstance, AxiosRequestConfig, AxiosResponse } from 'axios'
import { Result } from './types'
import { useUserStore } from '/@/store/modules/user'
class request {
  private instance: AxiosInstance
  private readonly options: AxiosRequestConfig
  constructor(options: AxiosRequestConfig) {
    this.options = options
    this.instance = axios.create(options)
    this.instance.interceptors.request.use(
      (config) => {
        const token = useUserStore().getToken
        if (token) {
          config.headers.Authorization = `Bearer ${token}`
        }
        return config
      },
      (err) => {
        return err
      }
    )
    this.instance.interceptors.response.use(
      (res) => {
        // 拦截响应的数据
        if (res.data.code === 0) {
          return res.data.data
        }
        return res.data
      },
      (err) => {
        return err
      }
    )
  }
  request<T = any>(config: AxiosRequestConfig): Promise<T> {
    return new Promise((resolve, reject) => {
      this.instance
        .request<any, AxiosResponse<Result<T>>>(config)
        .then((res) => {
          resolve((res as unknown) as Promise<T>)
        })
        .catch((err) => {
          reject(err)
        })
    })
  }
  get<T = any>(config: AxiosRequestConfig): Promise<T> {
    return this.request({ ...config, method: 'GET' })
  }
  post<T = any>(config: AxiosRequestConfig): Promise<T> {
    return this.request({ ...config, method: 'POST' })
  }
  patch<T = any>(config: AxiosRequestConfig): Promise<T> {
    return this.request({ ...config, method: 'PATCH' })
  }
  delete<T = any>(config: AxiosRequestConfig): Promise<T> {
    return this.request({ ...config, method: 'DELETE' })
  }
}
export default request

aixos取消请求

main.js

//axios cancel req
window.__axiosPromiseArr = []

utils/axiosReq.js

req.cancelToken = new axios.CancelToken((cancel) => {
  //__axiosPromiseArr收集请求地址
  window.__axiosPromiseArr.push({
    url: req.url,
    cancel
  })
})

思路就是那__axiosPromiseArr全局变量收集axios的请求url,然后挂载到window上
使用

const cancelReq = () => {
  //cancel all req when page switch
  if (window.__axiosPromiseArr) {
    window.__axiosPromiseArr.forEach((ele, ind) => {
      ele.cancel()
      delete window.__axiosPromiseArr[ind]
    })
  }
}

codewhy写法

import axios from 'axios'
import type { AxiosInstance } from 'axios'
//import type { HYRequestInterceptors, HYRequestConfig } from './type'
//---------------------------------------------------------------------------
import type { AxiosRequestConfig, AxiosResponse } from 'axios'
export interface HYRequestInterceptors<T = AxiosResponse> {
  requestInterceptor?: (config: AxiosRequestConfig) => AxiosRequestConfig
  requestInterceptorCatch?: (error: any) => any
  responseInterceptor?: (res: T) => T
  responseInterceptorCatch?: (error: any) => any
}
export interface HYRequestConfig<T = AxiosResponse> extends AxiosRequestConfig {
  interceptors?: HYRequestInterceptors<T>
  showLoading?: boolean
}
//---------------------------------------------------------------------------
import { ElLoading } from 'element-plus'
import { ILoadingInstance } from 'element-plus/lib/el-loading/src/loading.type'
const DEAFULT_LOADING = true
class HYRequest {
  instance: AxiosInstance
  interceptors?: HYRequestInterceptors
  showLoading: boolean
  loading?: ILoadingInstance
  constructor(config: HYRequestConfig) {
    // 创建axios实例
    this.instance = axios.create(config)
    // 保存基本信息
    this.showLoading = config.showLoading ?? DEAFULT_LOADING
    this.interceptors = config.interceptors
    // 使用拦截器
    // 1.从config中取出的拦截器是对应的实例的拦截器
    this.instance.interceptors.request.use(
      this.interceptors?.requestInterceptor,
      this.interceptors?.requestInterceptorCatch
    )
    this.instance.interceptors.response.use(
      this.interceptors?.responseInterceptor,
      this.interceptors?.responseInterceptorCatch
    )
    // 2.添加所有的实例都有的拦截器
    this.instance.interceptors.request.use(
      (config) => {
        if (this.showLoading) {
          this.loading = ElLoading.service({
            lock: true,
            text: '正在请求数据....',
            background: 'rgba(0, 0, 0, 0.5)'
          })
        }
        return config
      },
      (err) => {
        return err
      }
    )
    this.instance.interceptors.response.use(
      (res) => {
        // 将loading移除
        this.loading?.close()
        const data = res.data
        if (data.returnCode === '-1001') {
          console.log('请求失败~, 错误信息')
        } else {
          return data
        }
      },
      (err) => {
        // 将loading移除
        this.loading?.close()
        // 例子: 判断不同的HttpErrorCode显示不同的错误信息
        if (err.response.status === 404) {
          console.log('404的错误~')
        }
        return err
      }
    )
  }
  request<T = any>(config: HYRequestConfig<T>): Promise<T> {
    return new Promise((resolve, reject) => {
      // 1.单个请求对请求config的处理
      if (config.interceptors?.requestInterceptor) {
        config = config.interceptors.requestInterceptor(config)
      }
      // 2.判断是否需要显示loading
      if (config.showLoading === false) {
        this.showLoading = config.showLoading
      }
      this.instance
        .request<any, T>(config)
        .then((res) => {
          // 1.单个请求对数据的处理
          if (config.interceptors?.responseInterceptor) {
            res = config.interceptors.responseInterceptor(res)
          }
          // 2.将showLoading设置true, 这样不会影响下一个请求
          this.showLoading = DEAFULT_LOADING
          // 3.将结果resolve返回出去
          resolve(res)
        })
        .catch((err) => {
          // 将showLoading设置true, 这样不会影响下一个请求
          this.showLoading = DEAFULT_LOADING
          reject(err)
          return err
        })
    })
  }
  get<T = any>(config: HYRequestConfig<T>): Promise<T> {
    return this.request<T>({ ...config, method: 'GET' })
  }
  post<T = any>(config: HYRequestConfig<T>): Promise<T> {
    return this.request<T>({ ...config, method: 'POST' })
  }
  delete<T = any>(config: HYRequestConfig<T>): Promise<T> {
    return this.request<T>({ ...config, method: 'DELETE' })
  }
  patch<T = any>(config: HYRequestConfig<T>): Promise<T> {
    return this.request<T>({ ...config, method: 'PATCH' })
  }
}
export default HYRequest

上面代码axios封装的算是很全面了,就是对于ts不熟悉的有点不友好