js文件下载几种请求方式，普通请求方式封装

import axios from 'axios'
// axios.defaults.timeout = 30 * 1000;
// axios.defaults.headers.post['Content-Type'] = 'application/json;charset=UTF-8';
import FileSaver from 'file-saver'
import { saveAs } from 'file-saver/FileSaver';
import { reject } from 'lodash';
export function getRequest(url, params, noFilter) {
  var newParam
  if (!noFilter) {
    newParam = params
  } else {
    newParam = params
  }
  url += (url.indexOf('?') < 0 ? '?' : '&') + translateParam(newParam)
  return new Promise((resolve, reject) => {
    return axios.get(url).then(res => {
      resolve(res)
    })
      .catch(err => {
        reject(err)
      })
  })
}

export function postRequest(url, params) {
  return new Promise((resolve, reject) => {
    axios.post(url, params)
      .then(response => {
        resolve(response.data);
      })
      .catch(error => {
        reject(error);
      })
  })
}
export function putRequest(url, params) {
  return new Promise((resolve, reject) => {
    axios.put(url, params)
      .then(response => {
        resolve(response.data);
      })
      .catch(error => {
        reject(error);
      })
  })
}

export function deleteRequest(url, params) {
  return new Promise((resolve, reject) => {
    axios.delete(url, { data: params })
      .then(response => {
        resolve(response.data);
      })
      .catch(error => {
        reject(error);
      })
  })
}
// 下载文件 post
export function downloadPost(params, url, fileName = "") {
  return new Promise((resolve, reject) => {
    let context = ''
    axios({
      method: 'post',
      headers: {
        'Content-type': 'application/json'
      },
      data: params,
      url: url
    }).then(res => {
      let data = res.data
      var FileSaver = require('file-saver');
      var file = new File(['\uFEFF' + data], fileName + new Date().getTime() + '.csv', {
        type: 'text/plain;charset=utf-8'
      });
      FileSaver.saveAs(file);
      resolve()
    })
  })
}

// 下载文件 get
export function downloadUrl(url, type = '.csv', name) {
  return new Promise((resolve, reject) => {
    let context = ''
    axios.get(url).then(res => {
      // console.log(res)
      context = res.data
      let file = new File(["\uFEFF" + context], (name ? name : new Date().getTime()) + type, {
        type: "text/plain;charset=utf-8"
      })
      FileSaver.saveAs(file)
      resolve()
    })
  })

}



}
function fileDownload(data, type, fileName) {
  let blob = new Blob([data], {
    type: 'application/octet-stream'
  });
  let filename = fileName || 'filename.' + type;
  if (typeof window.navigator.msSaveBlob !== 'undefined') {
    window.navigator.msSaveBlob(blob, filename);
  } else {
    var blobURL = window.URL.createObjectURL(blob);
    var tempLink = document.createElement('a');
    tempLink.style.display = 'none';
    tempLink.href = blobURL;
    tempLink.setAttribute('download', filename);
    if (typeof tempLink.download === 'undefined') {
      tempLink.setAttribute('target', '_blank');
    }
    document.body.appendChild(tempLink);
    tempLink.click();
    document.body.removeChild(tempLink);
    window.URL.revokeObjectURL(blobURL);
  }
}
export function downloadExeclPost(url, params, type = 'xlsx', fileName = '') {
  let headerConfig = {};
  if (!params) {
    headerConfig = {
      method: 'get',
      url: baseURL + url,
      headers: {
        'Content-type': 'application/json',
        Authorization: 'Bearer ' + getToken() // 让每个请求携带自定义token 请根据实际情况自行修改
      },
      responseType: 'blob'
    };
  } else {
    headerConfig = {
      method: 'post',
      url: baseURL + url,
      headers: {
        'Content-type': 'application/json',
        Authorization: 'Bearer ' + getToken() // 让每个请求携带自定义token 请根据实际情况自行修改
      },
      responseType: 'blob',
      data: params
    };
  }
  return new Promise((resolve, reject) => {
    axios(headerConfig)
      .then((res) => {
        fileName = fileName ? fileName : new Date().getTime() + '.' + type; // }
        fileDownload(res.data, type, fileName);
        resolve();
      })
      .catch((error) => {
        alert('网络请求出错!', error);
      });
  });
}



export function translateTqParam(data) {
  let url = ''
  for (var k in data) {
    let value = data[k] !== undefined ? data[k] : ''
    url += `&${k}=${value}`
  }
  return url ? url.substring(1) : ''
}

export function translateParam(data) {
  let url = ''
  for (var k in data) {
    let value = data[k] !== undefined ? data[k] : ''
    url += `&${k}=${encodeURIComponent(value)}`
  }
  return url ? url.substring(1) : ''
}

export function filterParam(param) {
  let obj = {}
  for (let key in param) {
    if (param[key]) {
      obj[key] = param[key]
    }
  }
  return obj
}
　　

使用

import { getRequest, postRequest, downloadPost } from '@/assets/js/request'
import { reqUrl } from './api'
const BaseUrls = {
    getVins:reqUrl + 'tripanalyse/getOperatingCarVins'
}

export default {
    getVins(params) {
        let url = BaseUrls.getVins
        try {
            const result = postRequest(url, params)
            return result
        } catch (err) {
            return err
        }
    },
searchTableNames(params) {
        let url = BaseUrls.searchTableNames
        try {
            const result = getRequest(url, params)
            return result
        } catch (err) {
            return err
        }
    },
getDelete(params) {
    let url = BaswUrls.getDelete
    try{
        const result = deleteRequest(url,params)
        return result
    }catch(err){
        return err
    }
}
downloadDetail(params,fileName) {
        let url = BaseUrls.downloadDetail
        try {
            const result = downloadPost(params, url,fileName)
            return result
        } catch (err) {
            return err
        }
    },
socDistributionDownLoad(params,name){
    let url = `${BaseUrls.socDistributionDownLoad}?${translateParam(params)}`
    // let type = 'xls'
    await downloadUrl(url,'.csv',name)
}
bmsByBatteryDownload(params) {
    let url = `${BaseUrls.bmsByBatteryDownload}`
    let type = 'xls'
    await downloadExeclPost(url, params, type)
}
async infoDownload(params){
        let url = `${BaseUrls.infoDownload}?${translateParam(params)}`
        let type = 'xls'
       await downloadExecl(url, type)
    },

}