xjc-vue/src/utils/request.js

import axios from 'axios'
import {ElNotification, ElMessageBox, ElMessage, ElLoading} from 'element-plus'
import {getToken} from '@/utils/auth'
import errorCode from '@/utils/errorCode'
import {tansParams, blobValidate} from '@/utils/ruoyi'
import cache from '@/plugins/cache'
import {saveAs} from 'file-saver'
import useUserStore from '@/store/modules/user'

let downloadLoadingInstance
// 是否显示重新登录
export let isRelogin = {show: false}

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'
// 创建axios实例
const service = axios.create({
    // axios中请求配置有baseURL选项，表示请求URL公共部分
    baseURL: import.meta.env.VITE_APP_BASE_API,
    // 超时
    timeout: 10000
})

// request拦截器
service.interceptors.request.use(config => {
    // 是否需要设置 token
    const isToken = (config.headers || {}).isToken === false
    // 是否需要防止数据重复提交
    const isRepeatSubmit = (config.headers || {}).repeatSubmit === false
    if (getToken() && !isToken) {
        config.headers['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
    }
    // get请求映射params参数
    if (config.method === 'get' && config.params) {
        let url = config.url + '?' + tansParams(config.params)
        url = url.slice(0, -1)
        config.params = {}
        config.url = url
    }
    if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
        const requestObj = {
            url: config.url,
            data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
            time: new Date().getTime()
        }
        const requestSize = Object.keys(JSON.stringify(requestObj)).length // 请求数据大小
        const limitSize = 5 * 1024 * 1024 // 限制存放数据5M
        if (requestSize >= limitSize) {
            console.warn(`[${config.url}]: ` + '请求数据大小超出允许的5M限制，无法进行防重复提交验证。')
            return config
        }
        const sessionObj = cache.session.getJSON('sessionObj')
        if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
            cache.session.setJSON('sessionObj', requestObj)
        } else {
            const s_url = sessionObj.url                // 请求地址
            const s_data = sessionObj.data              // 请求数据
            const s_time = sessionObj.time              // 请求时间
            const interval = 1000                       // 间隔时间(ms)，小于此时间视为重复提交
            if (s_data === requestObj.data && requestObj.time - s_time < interval && s_url === requestObj.url) {
                const message = '数据正在处理，请勿重复提交'
                console.warn(`[${s_url}]: ` + message)
                return Promise.reject(new Error(message))
            } else {
                cache.session.setJSON('sessionObj', requestObj)
            }
        }
    }
    return config
}, error => {
    console.log(error)
    Promise.reject(error)
})

// 响应拦截器
service.interceptors.response.use(res => {
        // 未设置状态码则默认成功状态
        const code = res.data.code || 200
        // 获取错误信息
        const msg = errorCode[code] || res.data.msg || errorCode['default']
        // 二进制数据则直接返回
        if (res.request.responseType === 'blob' || res.request.responseType === 'arraybuffer') {
            return res.data
        }
        if (code === 401) {
            if (!isRelogin.show) {
                isRelogin.show = true
                ElMessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '系统提示', {
                    confirmButtonText: '重新登录',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).then(() => {
                    isRelogin.show = false
                    useUserStore().logOut().then(() => {
                        location.href = '/index'
                    })
                }).catch(() => {
                    isRelogin.show = false
                })
            }
            return Promise.reject('无效的会话，或者会话已过期，请重新登录。')
        } else if (code === 500) {
            ElMessage({message: msg, type: 'error'})
            return Promise.reject(new Error(msg))
        } else if (code === 601) {
            ElMessage({message: msg, type: 'warning'})
            return Promise.reject(new Error(msg))
        } else if (code !== 200) {
            ElNotification.error({title: msg})
            return Promise.reject('error')
        } else {
            return Promise.resolve(res.data)
        }
    },
    error => {
        console.log('err' + error)
        let {message} = error
        if (message == "Network Error") {
            message = "后端接口连接异常"
        } else if (message.includes("timeout")) {
            message = "系统接口请求超时"
        } else if (message.includes("Request failed with status code")) {
            message = "系统接口" + message.substr(message.length - 3) + "异常"
        }
        ElMessage({message: message, type: 'error', duration: 5 * 1000})
        return Promise.reject(error)
    }
)


// 文件上传方法
export function uploadFile(url, data) {
    return new Promise((resolve, reject) => {
        service({
            url: url,
            method: 'post',
            data: data,
            headers: {
                'Content-Type': 'multipart/form-data',
                'Authorization': 'Bearer ' + getToken()
            },
        }).then(response => {
            resolve(response.data)
        }).catch(error => {
            reject(error)
        })
    })
}

// 通用下载方法
export function download(url, params, filename, config) {
    downloadLoadingInstance = ElLoading.service({text: "正在下载数据，请稍候", background: "rgba(0, 0, 0, 0.7)",})
    return service.post(url, params, {
        transformRequest: [(params) => {
            return tansParams(params)
        }],
        headers: {'Content-Type': 'application/x-www-form-urlencoded'},
        responseType: 'blob',
        ...config
    }).then(async (data) => {
        const isBlob = blobValidate(data)
        if (isBlob) {
            const blob = new Blob([data])
            saveAs(blob, filename)
        } else {
            const resText = await data.text()
            const rspObj = JSON.parse(resText)
            const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
            ElMessage.error(errMsg)
        }
        downloadLoadingInstance.close()
    }).catch((r) => {
        console.error(r)
        ElMessage.error('下载文件出现错误，请联系管理员！')
        downloadLoadingInstance.close()
    })
}

export default service